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Earl CC, Javier AJ, Richards AM, Markham LW, Goergen CJ, Welc SS. Functional cardiac consequences of β-adrenergic stress-induced injury in the mdx mouse model of Duchenne muscular dystrophy. bioRxiv 2024:2024.04.15.589650. [PMID: 38659739 PMCID: PMC11042272 DOI: 10.1101/2024.04.15.589650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Cardiomyopathy is the leading cause of death in Duchenne muscular dystrophy (DMD), however, in the mdx mouse model of DMD, the cardiac phenotype differs from that seen in DMD-associated cardiomyopathy. Although some have used pharmacologic stress to enhance the cardiac phenotype in the mdx model, many methods lead to high mortality, variable cardiac outcomes, and do not recapitulate the structural and functional cardiac changes seen in human disease. Here, we describe a simple and effective method to enhance the cardiac phenotype model in mdx mice using advanced 2D and 4D high-frequency ultrasound to monitor cardiac dysfunction progression in vivo. For our study, mdx and wild-type (WT) mice received daily low-dose (2 mg/kg/day) isoproterenol injections for 10 days. Histopathologic assessment showed that isoproterenol treatment increased myocyte injury, elevated serum cardiac troponin I levels, and enhanced fibrosis in mdx mice. Ultrasound revealed reduced ventricular function, decreased wall thickness, increased volumes, and diminished cardiac reserve in mdx mice compared to wild-type. Our findings highlight the utility of low-dose isoproterenol in mdx mice as a valuable model for exploring therapies targeting DMD-associated cardiac complications.
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Affiliation(s)
- Conner C. Earl
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette IN, USA
- Indiana University School of Medicine, IN, USA
| | - Areli J. Javier
- Musculoskeletal Health Sciences Program, Indiana University School of Medicine, Indianapolis, IN USA
| | - Alyssa M. Richards
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette IN, USA
| | - Larry W. Markham
- Division of Pediatric Cardiology, Riley Children’s Hospital at Indiana University Health, Indiana University School of Medicine, Indianapolis, IN
| | - Craig J. Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette IN, USA
- Indiana University School of Medicine, IN, USA
| | - Steven S. Welc
- Division of Pediatric Cardiology, Riley Children’s Hospital at Indiana University Health, Indiana University School of Medicine, Indianapolis, IN
- Department of Anatomy, Cell Biology & Physiology, Indiana University School of Medicine, Indianapolis IN, USA
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Carroll CC, Campbell NW, Lewis RL, Preston SE, Garrett CM, Winstone HM, Barker AC, Vanos JM, Stouder LS, Reyes C, Fortino MA, Goergen CJ, Hass ZJ, Campbell WW. Greater Protein Intake Emphasizing Lean Beef Does Not Affect Resistance Training-Induced Adaptations in Skeletal Muscle and Tendon of Older Women: A Randomized Controlled Feeding Trial. J Nutr 2024:S0022-3166(24)00169-X. [PMID: 38604504 DOI: 10.1016/j.tjnut.2024.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 03/22/2024] [Accepted: 04/02/2024] [Indexed: 04/13/2024] Open
Abstract
BACKGROUND Although experimental research supports that resistance training (RT), especially with greater dietary protein intake, improves muscle mass and strength in older adults, comparable research on tendons is needed. OBJECTIVES We assessed the effects of a protein-rich diet emphasizing lean beef, compared with 2 control diets, on RT-induced changes in skeletal muscle and tendon size and strength in older women. METHODS We randomly assigned women [age: 66 ± 1 y, body mass index (BMI): 28 ± 1] to groups that consumed 1) 0.8 g total protein/kg body weight/day from mixed food sources (normal protein control, n = 16); 2) 1.4 g/kg/d protein from mixed food sources (high protein control, n = 17); or 3) 1.4 g/kg/d protein emphasizing unprocessed lean beef (high protein experimental group, n = 16). Participants were provided with all foods and performed RT 3 times/wk, 70% of 1-repetition maximum for 12 wk. We measured quadriceps muscle volume via magnetic resonance imaging (MRI). We estimated patellar tendon biomechanical properties and cross-sectional area (CSA) using ultrasound and MRI. RESULTS Dietary intake did not influence RT-induced increases in quadriceps strength (P < 0.0001) or muscle volume (P < 0.05). We noted a trend for an RT effect on mean tendon CSA (P = 0.07), with no differences among diets (P > 0.05). Proximal tendon CSA increased with RT (P < 0.05) with no difference between dietary groups (P > 0.05). Among all participants, midtendon CSA increased with RT (P ≤ 0.05). We found a decrease in distal CSA in the 0.8 g group (P < 0.05) but no change in the 1.4 g group (P > 0.05). Patellar tendon MRI signal or biomechanical properties were unchanged. CONCLUSIONS Our findings indicated that greater daily protein intake, emphasizing beef, did not influence RT-induced changes in quadriceps muscle strength or muscle volume of older women. Although we noted trends in tendon CSA, we did not find a statistically significant impact of greater daily protein intake from beef on tendon outcomes. This trial was registered at clinicaltrials.gov as NCT04347447.
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Affiliation(s)
- Chad C Carroll
- Department of Health and Kinesiology, Purdue University, West Lafayette, IN, United States.
| | - Nathan Wc Campbell
- Department of Health and Kinesiology, Purdue University, West Lafayette, IN, United States
| | - Rebecca L Lewis
- Department of Health and Kinesiology, Purdue University, West Lafayette, IN, United States
| | - Sarah E Preston
- Department of Health and Kinesiology, Purdue University, West Lafayette, IN, United States
| | - Chloe M Garrett
- Department of Health and Kinesiology, Purdue University, West Lafayette, IN, United States
| | - Hannah M Winstone
- Department of Health and Kinesiology, Purdue University, West Lafayette, IN, United States
| | - Anna C Barker
- Department of Health and Kinesiology, Purdue University, West Lafayette, IN, United States
| | - Johnny M Vanos
- Department of Health and Kinesiology, Purdue University, West Lafayette, IN, United States
| | - Lucas S Stouder
- Department of Health and Kinesiology, Purdue University, West Lafayette, IN, United States
| | - Camila Reyes
- Department of Health and Kinesiology, Purdue University, West Lafayette, IN, United States
| | - Matthew A Fortino
- Department of Health and Kinesiology, Purdue University, West Lafayette, IN, United States
| | - Craig J Goergen
- Department of Health and Kinesiology, Purdue University, West Lafayette, IN, United States; Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, United States
| | - Zachary J Hass
- School of Nursing, Purdue University, West Lafayette, IN, United States; School of Industrial Engineering, Purdue University, West Lafayette, IN, United States; Regenstrief Center for Healthcare Engineering, Purdue University, West Lafayette, IN, United States
| | - Wayne W Campbell
- Department of Nutrition Science, Purdue University, West Lafayette, IN, United States
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Schepers LE, Martindale BL, Berman AG, Cebull HL, Van Alstine W, Hollingshead SE, Novak T, Goergen CJ. Photocurable extracellular matrix sealant for cessation of venous hemorrhage. J Biomed Mater Res B Appl Biomater 2024; 112:e35401. [PMID: 38520703 DOI: 10.1002/jbm.b.35401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 01/23/2024] [Accepted: 02/18/2024] [Indexed: 03/25/2024]
Abstract
Hemorrhage is the second leading cause of death in patients under 46 years of age in the United States. Cessation of hemorrhage prevents hemorrhagic shock and tissue hypoxia. Controlling the bleed via direct pressure or tourniquet is often the first line of defense, but long-term care requires staples, hemostatic agents, or sealants that seal the vessel and restore blood flow. Here, we compare a new photocurable extracellular matrix sealant (pcECM) with low, medium, and high crosslink density formulations to a commercially available fibrin-based sealant, TISSEEL®. pcECM has potential uses in surgical and remote settings due to room temperature storage conditions and fast preparation time. Here, we determine if pcECM sealant can stop venous hemorrhage in a murine model, adhere to the wound site in vivo throughout the wound-healing process, and has the mechanical properties necessary for stopping hemorrhage. Adjusting pcECM crosslinking density significantly affected viscosity, swelling, burst strength, tensile strength, and elasticity of the sealant. 3-Dimensional ultrasound volume segmentations showed pcECM degrades to 17 ± 8% of its initial implant volume by day 28. Initially, local hemodynamic changes were observed, but returned close to baseline levels by day 28. Acute inflammation was observed near the puncture site in pcECM implanted mice, and we observed inflammatory markers at the 14-day explant for both sealants. pcECM and fibrin sealant successfully sealed the vessel in all cases, and consistently degraded over 14-28 days. pcECM is a durable sealant with tunable mechanical properties and possible uses in hemorrhage control and other surgical procedures.
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Affiliation(s)
- Luke E Schepers
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
| | | | - Alycia G Berman
- Product Engineering, Cook Biotech Inc., West Lafayette, Indiana, USA
| | - Hannah L Cebull
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
| | | | | | - Tyler Novak
- Product Engineering, Cook Biotech Inc., West Lafayette, Indiana, USA
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
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Patel SH, Campbell NWC, Emenim CE, Farino DO, Damen FW, Rispoli JV, Goergen CJ, Haus JM, Sabbaghi A, Carroll CC. Patellar tendon biomechanical and morphologic properties and their relationship to serum clinical variables in persons with prediabetes and type 2 diabetes. J Orthop Res 2024. [PMID: 38400550 DOI: 10.1002/jor.25816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 01/08/2024] [Accepted: 01/27/2024] [Indexed: 02/25/2024]
Abstract
Tendon biomechanical properties and fibril organization are altered in patients with diabetes compared to healthy individuals, yet few biomarkers have been associated with in vivo tendon properties. We investigated the relationships between in vivo imaging-based tendon properties, serum variables, and patient characteristics across healthy controls (n = 14, age: 45 ± 5 years, body mass index [BMI]: 24 ± 1, hemoglobin A1c [HbA1c]: 5.3 ± 0.1%), prediabetes (n = 14, age: 54 ± 5 years, BMI: 29 ± 2; HbA1c: 5.7 ± 0.1), and type 2 diabetes (n = 13, age: 55 ± 3 years, BMI: 33 ± 2, HbA1c: 6.7 ± 0.3). We used ultrasound speckle-tracking and measurements from magnetic resonance imaging (MRI) to estimate the patellar tendon in vivo tangent modulus. Analysis of plasma c-peptide, interleukin-1β (IL-1β), IL-6, IL-8, tumor necrosis factor-α (TNF-α), adiponectin, leptin, insulin-like growth factor 1 (IGF-1), and C-reactive protein (CRP) was completed. We built regression models incorporating statistically significant covariates and indicators for the clinically defined groups. We found that tendon cross-sectional area normalized to body weight (BWN CSA) and modulus were lower in patients with type 2 diabetes than in healthy controls (p < 0.05). Our regression analysis revealed that a model that included BMI, leptin, high-density lipoprotein (HDL), low-density lipoprotein (LDL), age, and group explained ~70% of the variability in BWN CSA (R2 = 0.70, p < 0.001). For modulus, including the main effects LDL, groups, HbA1c, age, BMI, cholesterol, IGF-1, c-peptide, leptin, and IL-6, accounted for ~54% of the variability in modulus (R2 = 0.54, p < 0.05). While BWN CSA and modulus were lower in those with diabetes, group was a poor predicter of tendon properties when considering the selected covariates. These data highlight the multifactorial nature of tendon changes with diabetes and suggest that blood variables could be reliable predictors of tendon properties.
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Affiliation(s)
- Shivam H Patel
- Department of Health and Kinesiology, Purdue University, West Lafayette, Indiana, USA
| | - Nathan W C Campbell
- Department of Health and Kinesiology, Purdue University, West Lafayette, Indiana, USA
| | - Chinonso E Emenim
- Department of Health and Kinesiology, Purdue University, West Lafayette, Indiana, USA
| | - Dominick O Farino
- Department of Health and Kinesiology, Purdue University, West Lafayette, Indiana, USA
| | - Frederick W Damen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
| | - Joseph V Rispoli
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
| | - Craig J Goergen
- Department of Health and Kinesiology, Purdue University, West Lafayette, Indiana, USA
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
| | - Jacob M Haus
- School of Kinesiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Arman Sabbaghi
- Head of Clinical Methods, Unlearn.AI, San Francisco, California, USA
| | - Chad C Carroll
- Department of Health and Kinesiology, Purdue University, West Lafayette, Indiana, USA
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Duan C, Anderson JL, Schepers LE, Damen FW, Cox A, Goergen CJ, Sivasankar PM. In Vivo Visualization and Quantification of Rat Laryngeal Blood Supply After Hydration Challenge. Laryngoscope 2024; 134:779-785. [PMID: 37584333 PMCID: PMC10842383 DOI: 10.1002/lary.30965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 05/31/2023] [Accepted: 08/01/2023] [Indexed: 08/17/2023]
Abstract
OBJECTIVES Systemic dehydration decreases total body blood volume; however, hemodynamic alterations at the level of local organs, such as the larynx, remain unclear. Here we sought to quantify superior thyroid artery (STA) blood flow after dehydration and rehydration using in vivo magnetic resonance angiography (MRA) and ultrasound imaging in a rat model. METHODS Male Sprague-Dawley rats (N = 17) were included in this prospective, repeated measures design. Rats first underwent MRA to determine baseline STA cross-sectional area, followed by high-frequency in vivo ultrasound imaging to measure STA blood velocity at baseline. Next, rats were systemically dehydrated (water withholding), followed by rehydration (water ad-lib). Ultrasound imaging was repeated immediately after dehydration and following rehydration. The STA blood velocity and STA cross-sectional area were used to compute STA blood flow. Three rats served as temporal controls for ultrasound imaging. To determine if the challenges to hydration status affected the STA cross-sectional area, four rats underwent only MRA at baseline, dehydration, and rehydration. RESULTS Systemic dehydration resulted in 10.5% average body weight loss. Rehydration resulted in average body weight gain of 10.9%. Statistically significant reductions were observed in STA mean blood flow rate after dehydration. Rehydration reversed these changes to pre-dehydration levels. No significant differences were observed in STA cross-sectional area with dehydration or rehydration. CONCLUSION Systemic dehydration decreased blood flow in the superior thyroid artery. Rehydration restored blood flow in the STA. Change in hydration status did not alter the STA cross-sectional area. These preliminary findings demonstrate the feasibility of using ultrasound and MRA to quantify hemodynamic changes and visualize laryngeal blood vessels. LEVEL OF EVIDENCE NA Laryngoscope, 134:779-785, 2024.
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Affiliation(s)
- Chenwei Duan
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN
- Department of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, IN
| | | | - Luke E. Schepers
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN
| | - Frederick W. Damen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN
- Indiana University School of Medicine, Indianapolis, IN
| | - Abigail Cox
- Department of Comparative Pathobiology, Purdue University, West Lafayette, IN
| | - Craig J. Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN
- Indiana University School of Medicine, Indianapolis, IN
| | - Preeti M. Sivasankar
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN
- Department of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, IN
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Consolini J, Oberman AG, Sayut J, Damen FW, Goergen CJ, Ravosa MJ, Holland MA. Investigation of direction- and age-dependent prestretch in mouse cranial dura mater. Biomech Model Mechanobiol 2024:10.1007/s10237-023-01802-6. [PMID: 38206531 DOI: 10.1007/s10237-023-01802-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 11/30/2023] [Indexed: 01/12/2024]
Abstract
Cranial dura mater is a dense interwoven vascularized connective tissue that helps regulate neurocranial remodeling by responding to strains from the growing brain. Previous ex vivo experimentation has failed to account for the role of prestretch in the mechanical behavior of the dura. Here we aim to estimate the prestretch in mouse cranial dura mater and determine its dependency on direction and age. We performed transverse and longitudinal incisions in parietal dura excised from newborn (day [Formula: see text]4) and mature (12 weeks) mice and calculated the ex vivo normalized incision opening (measured width over length). Then, similar incisions were simulated under isotropic stretching within Abaqus/Standard. Finally, prestretch was estimated by comparing the ex vivo and in silico normalized openings. There were no significant differences between the neonatal and adult mice when comparing cuts in the same direction, but adult mice were found to have significantly greater stretch in the anterior-posterior direction than in the medial-lateral direction, while neonatal dura was essentially isotropic. Additionally, our simulations show that increasing curvature impacts the incision opening, indicating that flat in silico models may overestimate prestretch.
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Affiliation(s)
- Jack Consolini
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Alyssa G Oberman
- Center for Functional Anatomy and Evolution, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - John Sayut
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Frederick W Damen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Matthew J Ravosa
- Center for Functional Anatomy and Evolution, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Maria A Holland
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN, 46556, USA.
- Bioengineering Graduate Program, University of Notre Dame, Notre Dame, IN, 46556, USA.
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Kaefer SL, Zhang L, Morrison RA, Brookes S, Awonusi O, Shay E, Hoilett OS, Anderson JL, Goergen CJ, Voytik-Harbin S, Halum S. Early Changes in Porcine Larynges Following Injection of Motor-Endplate Expressing Muscle Cells for the Treatment of Unilateral Vocal Fold Paralysis. Laryngoscope 2024; 134:272-282. [PMID: 37436167 DOI: 10.1002/lary.30868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 06/05/2023] [Accepted: 06/21/2023] [Indexed: 07/13/2023]
Abstract
OBJECTIVES No curative injectable therapy exists for unilateral vocal fold paralysis. Herein, we explore the early implications of muscle-derived motor-endplate expressing cells (MEEs) for injectable vocal fold medialization after recurrent laryngeal nerve (RLN) injury. METHODS Yucatan minipigs underwent right RLN transection (without repair) and muscle biopsies. Autologous muscle progenitor cells were isolated, cultured, differentiated, and induced to form MEEs. Three weeks after the injury, MEEs or saline were injected into the paralyzed right vocal fold. Outcomes including evoked laryngeal electromyography (LEMG), laryngeal adductor pressure, and acoustic vocalization data were analyzed up to 7 weeks post-injury. Harvested porcine larynges were examined for volume, gene expression, and histology. RESULTS MEE injections were tolerated well, with all pigs demonstrating continued weight gain. Blinded analysis of videolaryngoscopy post-injection revealed infraglottic fullness, and no inflammatory changes. Four weeks after injection, LEMG revealed on average higher right distal RLN activity retention in MEE pigs. MEE-injected pigs on average had vocalization durations, frequencies, and intensities higher than saline pigs. Post-mortem, the MEE-injected larynges revealed statistically greater volume on quantitative 3D ultrasound, and statistically increased expression of neurotrophic factors (BDNF, NGF, NTF3, NTF4, NTN1) on quantitative PCR. CONCLUSIONS Minimally invasive MEE injection appears to establish an early molecular and microenvironmental framework to encourage innate RLN regeneration. Longer follow-up is needed to determine if early findings will translate into functional contraction. LEVEL OF EVIDENCE NA Laryngoscope, 134:272-282, 2024.
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Affiliation(s)
- Samuel L Kaefer
- School of Medicine, Indiana University, Indianapolis, Indiana, U.S.A
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, U.S.A
| | - Lujuan Zhang
- School of Medicine, Department of Otolaryngology-Head and Neck Surgery, Indiana University, Indianapolis, Indiana, U.S.A
| | - Rachel A Morrison
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, U.S.A
| | - Sarah Brookes
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, U.S.A
| | - Oluwaseyi Awonusi
- School of Medicine, Indiana University, Indianapolis, Indiana, U.S.A
| | - Elizabeth Shay
- School of Medicine, Department of Otolaryngology-Head and Neck Surgery, Indiana University, Indianapolis, Indiana, U.S.A
| | - Orlando S Hoilett
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, U.S.A
- Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, U.S.A
| | - Jennifer L Anderson
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, U.S.A
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, U.S.A
| | - Sherry Voytik-Harbin
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, U.S.A
- Department of Basic Medical Sciences, Purdue University, West Lafayette, Indiana, U.S.A
| | - Stacey Halum
- School of Medicine, Indiana University, Indianapolis, Indiana, U.S.A
- School of Medicine, Department of Otolaryngology-Head and Neck Surgery, Indiana University, Indianapolis, Indiana, U.S.A
- Department of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, Indiana, U.S.A
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Salvas JP, Leyba KA, Schepers LE, Paiyabhroma N, Goergen CJ, Sicard P. Neurovascular Hypoxia Trajectories Assessed by Photoacoustic Imaging in a Murine Model of Cardiac Arrest and Resuscitation. IEEE Trans Ultrason Ferroelectr Freq Control 2023; 70:1661-1670. [PMID: 37043326 DOI: 10.1109/tuffc.2023.3265800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Cardiac arrest is a common cause of death annually mainly due to postcardiac arrest syndrome that leads to multiple organ global hypoxia and dysfunction after resuscitation. The ability to quantify vasculature changes and tissue oxygenation is crucial to adapt patient treatment in order to minimize major outcomes after resuscitation. For the first time, we applied high-resolution ultrasound associated with photoacoustic imaging (PAI) to track neurovascular oxygenation and cardiac function trajectories in a murine model of cardiac arrest and resuscitation. We report the preservation of brain oxygenation is greater compared to that in peripheral tissues during the arrest. Furthermore, distinct patterns of cerebral oxygen decay may relate to the support of vital brain functions. In addition, we followed trajectories of cerebral perfusion and cardiac function longitudinally after induced cardiac arrest and resuscitation. Volumetric cerebral oxygen saturation (sO2) decreased 24 h postarrest, but these levels rebounded at one week. However, systolic and diastolic cardiac dysfunction persisted throughout and correlated with cerebral hypoxia. Pathophysiologic biomarker trends, identified via cerebral PAI in preclinical models, could provide new insights into understanding the pathophysiology of cardiac arrest and resuscitation.
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Earl CC, Jauregui AM, Lin G, Hor KN, Markham LW, Soslow JH, Goergen CJ. Regional 4D Cardiac Magnetic Resonance Strain Predicts Cardiomyopathy Progression in Duchenne Muscular Dystrophy. medRxiv 2023:2023.11.07.23298238. [PMID: 37986975 PMCID: PMC10659514 DOI: 10.1101/2023.11.07.23298238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Background Cardiomyopathy (CMP) is the leading cause of death in Duchenne muscular dystrophy (DMD). Characterization of disease trajectory can be challenging, especially in the early stage of CMP where onset and clinical progression may vary. Traditional metrics from cardiovascular magnetic resonance (CMR) imaging such as LVEF (left ventricular ejection fraction) and LGE (late gadolinium enhancement) are often insufficient for assessing disease trajectory. We hypothesized that strain patterns from a novel 4D (3D+time) CMR regional strain analysis method can be used to predict the rate of DMD CMP progression. Methods We compiled 115 short-axis cine CMR image stacks for n=40 pediatric DMD patients (13.6±4.2 years) imaged yearly for 3 consecutive visits and computed regional strain metrics using custom-built feature tracking software. We measured regional strain parameters by determining the relative change in the localized 4D endocardial surface mesh using end diastole as the initial reference frame. Results We first separated patients into two cohorts based on their initial CMR: LVEF≥55% (n=28, normal cohort) and LVEF<55% (n=12, abnormal cohort). Using LVEF decrease measured two years following the initial scan, we further subclassified these cohorts into slow (ΔLVEF%≤5) or fast (ΔLVEF%>5) progression groups for both the normal cohort (n=12, slow; n=15, fast) and the abnormal cohort (n=8, slow; n=4, fast). There was no statistical difference between the slow and fast progression groups in standard biomarkers such as LVEF, age, or LGE status. However, basal circumferential strain (Ecc) late diastolic strain rate and basal surface area strain (Ea) late diastolic strain rate magnitude were significantly decreased in fast progressors in both normal and abnormal cohorts (p<0.01, p=0.04 and p<0.01, p=0.02, respectively). Peak Ea and Ecc magnitudes were also decreased in fast progressors, though these only reached statistical significance in the normal cohort (p<0.01, p=0.24 and p<0.01, p=0.18, respectively). Conclusion Regional strain metrics from 4D CMR can be used to differentiate between slow or fast CMP progression in a longitudinal DMD cohort. These results demonstrate that 4D CMR strain is useful for early identification of CMP progression in patients with DMD. Clinical Perspective Cardiomyopathy is the number one cause of death in Duchenne muscular dystrophy, but the onset and progression of the disease are variable and heterogeneous. In this study, we used a novel 4D cardiovascular magnetic resonance regional strain analysis method to evaluate 40 pediatric Duchenne patients over three consecutive annual visits. From our analysis, we found that peak systolic strain and late diastolic strain rate were early indicators of cardiomyopathy progression. This method offers promise for early detection and monitoring, potentially improving patient outcomes through timely intervention and management.
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Affiliation(s)
- Conner C. Earl
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN
- Indiana University School of Medicine, Indianapolis, IN
| | - Alexa M. Jauregui
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN
- Indiana University School of Medicine, Indianapolis, IN
| | - Guang Lin
- Department of Mathematics & School of Mechanical Engineering, Purdue University, West Lafayette, IN
| | - Kan N. Hor
- The Heart Center, Nationwide Children’s Hospital, Ohio State University, Columbus, OH, USA
| | - Larry W. Markham
- Division of Pediatric Cardiology, Riley Children’s Hospital at Indiana University Health, Indiana University School of Medicine, Indianapolis, IN
| | - Jonathan H. Soslow
- Division of Pediatric Cardiology, Department of Pediatrics, Vanderbilt University Medical Center
| | - Craig J. Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN
- Indiana University School of Medicine, Indianapolis, IN
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Cebull HL, Aremu OO, Kulkarni RS, Zhang SX, Samuels P, Jermy S, Ntusi NA, Goergen CJ. Simulating Subject-Specific Aortic Hemodynamic Effects of Valvular Lesions in Rheumatic Heart Disease. J Biomech Eng 2023; 145:111003. [PMID: 37470483 PMCID: PMC10405283 DOI: 10.1115/1.4063000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 07/16/2023] [Accepted: 07/17/2023] [Indexed: 07/21/2023]
Abstract
Rheumatic heart disease (RHD) is a neglected tropical disease despite the substantial global health burden. In this study, we aimed to develop a lower cost method of modeling aortic blood flow using subject-specific velocity profiles, aiding our understanding of RHD's consequences on the structure and function of the ascending aorta. Echocardiography and cardiovascular magnetic resonance (CMR) are often used for diagnosis, including valve dysfunction assessments. However, there is a need to further characterize aortic valve lesions to improve treatment options and timing for patients, while using accessible and affordable imaging strategies. Here, we simulated effects of RHD aortic valve lesions on the aorta using computational fluid dynamics (CFD). We hypothesized that inlet velocity distribution and wall shear stress (WSS) will differ between RHD and non-RHD individuals, as well as between subject-specific and standard Womersley velocity profiles. Phase-contrast CMR data from South Africa of six RHD subjects with aortic stenosis and/or regurgitation and six matched controls were used to estimate subject-specific velocity inlet profiles and the mean velocity for Womersley profiles. Our findings were twofold. First, we found WSS in subject-specific RHD was significantly higher (p < 0.05) than control subject simulations, while Womersley simulation groups did not differ. Second, evaluating spatial velocity differences (ΔSV) between simulation types revealed that simulations of RHD had significantly higher ΔSV than non-RHD (p < 0.05), these results highlight the need for implementing subject-specific input into RHD CFD, which we demonstrate how to accomplish through accessible methods.
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Affiliation(s)
- Hannah L. Cebull
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907; Cape Heart Institute, Faculty of Health Sciences, University of Cape Town, Observatory 7925, South Africa; Cape Universities Body Imaging Centre, Faculty of Health Sciences, University of Cape Town, Observatory 7925, South Africa; Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, GA 30322
| | - Olukayode O. Aremu
- Cape Heart Institute, Faculty of Health Sciences, University of Cape Town, Observatory 7925, South Africa; Cape Universities Body Imaging Centre, Faculty of Health Sciences, University of Cape Town, Observatory 7925, South Africa; Division of Cardiology, Department of Medicine, Faculty of Health Sciences, University of Cape Town and Groote Schuur Hospital, Observatory7925, South Africa
| | - Radhika S. Kulkarni
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907
| | - Samuel X. Zhang
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907
| | - Petronella Samuels
- Cape Universities Body Imaging Centre, Faculty of Health Sciences, University of Cape Town, Observatory 7925, South Africa; Division of Biomedical Engineering, Department of Human Biology, University of Cape Town, Observatory 7925, South Africa
| | - Stephen Jermy
- Cape Universities Body Imaging Centre, Faculty of Health Sciences, University of Cape Town, Observatory 7925, South Africa; Division of Biomedical Engineering, Department of Human Biology, University of Cape Town, Observatory 7925, South Africa
| | - Ntobeko A.B. Ntusi
- Cape Heart Institute, Faculty of Health Sciences, University of Cape Town, Observatory 7925, South Africa; Cape Universities Body Imaging Centre, Faculty of Health Sciences, University of Cape Town, Observatory 7925, South Africa; Division of Cardiology, Department of Medicine, Faculty of Health Sciences, University of Cape Town and Groote Schuur Hospital, Observatory 7925, South Africa; South African Medical Research Council Extramural Unit on the Intersection of Noncommunicable Diseases and Infectious Diseases, Cape Town 7925, South Africa
| | - Craig J. Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907; Indiana University School of Medicine, Indianapolis, IN 46202
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11
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Bäumler K, Phillips EH, Grande Gutiérrez N, Fleischmann D, Marsden AL, Goergen CJ. Longitudinal investigation of aortic dissection in mice with computational fluid dynamics. Comput Methods Biomech Biomed Engin 2023:1-14. [PMID: 37897230 DOI: 10.1080/10255842.2023.2274281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 09/30/2023] [Indexed: 10/29/2023]
Abstract
Predicting late adverse events in aortic dissections is challenging. One commonly observed risk factor is partial thrombosis of the false lumen. In this study we investigated false lumen thrombus progression over 7 days in four mice with angiotensin II-induced aortic dissection. We performed computational fluid dynamic simulations with subject-specific boundary conditions from velocity and pressure measurements. We investigated endothelial cell activation potential, mean velocity, thrombus formation potential, and other hemodynamic factors. Our findings support the hypothesis that flow stagnation is the predominant hemodynamic factor driving a large thrombus ratio in false lumina, particularly those with a single fenestration.
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Affiliation(s)
| | - Evan H Phillips
- Weldon School of Biomedical Engineering, Purdue University, IN, USA
- Department of Pharmaceutical Sciences, University of IL at Chicago, IL, USA
| | | | | | - Alison L Marsden
- Department of Bioengineering, Stanford University, CA, USA
- Department of Pediatrics (Cardiology), Stanford University, CA, USA
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, IN, USA
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12
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Perike S, Gonzalez-Gonzalez FJ, Abu-Taha I, Damen FW, Hanft LM, Lizama KS, Aboonabi A, Capote AE, Aguilar-Sanchez Y, Levin B, Han Z, Sridhar A, Grand J, Martin J, Akar JG, Warren CM, Solaro RJ, Sang-Ging O, Darbar D, McDonald KS, Goergen CJ, Wolska BM, Dobrev D, Wehrens XH, McCauley MD. PPP1R12C Promotes Atrial Hypocontractility in Atrial Fibrillation. Circ Res 2023; 133:758-771. [PMID: 37737016 PMCID: PMC10616980 DOI: 10.1161/circresaha.123.322516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 09/14/2023] [Indexed: 09/23/2023]
Abstract
BACKGROUND Atrial fibrillation (AF)-the most common sustained cardiac arrhythmia-increases thromboembolic stroke risk 5-fold. Although atrial hypocontractility contributes to stroke risk in AF, the molecular mechanisms reducing myofilament contractile function remain unknown. We tested the hypothesis that increased expression of PPP1R12C (protein phosphatase 1 regulatory subunit 12C)-the PP1 (protein phosphatase 1) regulatory subunit targeting MLC2a (atrial myosin light chain 2)-causes hypophosphorylation of MLC2a and results in atrial hypocontractility. METHODS Right atrial appendage tissues were isolated from human patients with AF versus sinus rhythm controls. Western blots, coimmunoprecipitation, and phosphorylation studies were performed to examine how the PP1c (PP1 catalytic subunit)-PPP1R12C interaction causes MLC2a dephosphorylation. In vitro studies of pharmacological MRCK (myotonic dystrophy kinase-related Cdc42-binding kinase) inhibitor (BDP5290) in atrial HL-1 cells were performed to evaluate PP1 holoenzyme activity on MLC2a. Cardiac-specific lentiviral PPP1R12C overexpression was performed in mice to evaluate atrial remodeling with atrial cell shortening assays, echocardiography, and AF inducibility with electrophysiology studies. RESULTS In human patients with AF, PPP1R12C expression was increased 2-fold versus sinus rhythm controls (P=2.0×10-2; n=12 and 12 in each group) with >40% reduction in MLC2a phosphorylation (P=1.4×10-6; n=12 and 12 in each group). PPP1R12C-PP1c binding and PPP1R12C-MLC2a binding were significantly increased in AF (P=2.9×10-2 and 6.7×10-3, respectively; n=8 and 8 in each group). In vitro studies utilizing drug BDP5290, which inhibits T560-PPP1R12C phosphorylation, demonstrated increased PPP1R12C binding with both PP1c and MLC2a and dephosphorylation of MLC2a. Mice treated with lentiviral PPP1R12C vector demonstrated a 150% increase in left atrial size versus controls (P=5.0×10-6; n=12, 8, and 12), with reduced atrial strain and atrial ejection fraction. Pacing-induced AF in mice treated with lentiviral PPP1R12C vector was significantly higher than in controls (P=1.8×10-2 and 4.1×10-2, respectively; n=6, 6, and 5). CONCLUSIONS Patients with AF exhibit increased levels of PPP1R12C protein compared with controls. PPP1R12C overexpression in mice increases PP1c targeting to MLC2a and causes MLC2a dephosphorylation, which reduces atrial contractility and increases AF inducibility. These findings suggest that PP1 regulation of sarcomere function at MLC2a is a key determinant of atrial contractility in AF.
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Affiliation(s)
- Srikanth Perike
- Division of Cardiology, Department of Medicine, College of Medicine, University of Illinois at Chicago
- Department of Physiology and Biophysics and the Center for Cardiovascular Research, University of Illinois at Chicago
- Jesse Brown VA Medical Center, Chicago, IL
| | - Francisco J. Gonzalez-Gonzalez
- Division of Cardiology, Department of Medicine, College of Medicine, University of Illinois at Chicago
- Department of Physiology and Biophysics and the Center for Cardiovascular Research, University of Illinois at Chicago
- Jesse Brown VA Medical Center, Chicago, IL
| | - Issam Abu-Taha
- Institute of Pharmacology, West German Heart and Vascular Center, University Duisburg-Essen, Germany
| | - Frederick W. Damen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN
| | - Laurin M. Hanft
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia
| | - Ken S. Lizama
- Division of Cardiology, Department of Medicine, College of Medicine, University of Illinois at Chicago
- Department of Physiology and Biophysics and the Center for Cardiovascular Research, University of Illinois at Chicago
- Jesse Brown VA Medical Center, Chicago, IL
| | - Anahita Aboonabi
- Division of Cardiology, Department of Medicine, College of Medicine, University of Illinois at Chicago
- Department of Physiology and Biophysics and the Center for Cardiovascular Research, University of Illinois at Chicago
| | - Andrielle E. Capote
- Division of Cardiology, Department of Medicine, College of Medicine, University of Illinois at Chicago
- Department of Physiology and Biophysics and the Center for Cardiovascular Research, University of Illinois at Chicago
| | - Yuriana Aguilar-Sanchez
- Department of Integrative Physiology and The Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX
| | | | - Zhenbo Han
- Department of Pharmacology and Regenerative Medicine, College of Medicine,University of Illinois at Chicago
| | - Arvind Sridhar
- Division of Cardiology, Department of Medicine, College of Medicine, University of Illinois at Chicago
| | - Jacob Grand
- Division of Cardiology, Department of Medicine, College of Medicine, University of Illinois at Chicago
| | | | | | - Chad M. Warren
- Department of Physiology and Biophysics and the Center for Cardiovascular Research, University of Illinois at Chicago
| | - R. John Solaro
- Department of Physiology and Biophysics and the Center for Cardiovascular Research, University of Illinois at Chicago
| | - Ong Sang-Ging
- Division of Cardiology, Department of Medicine, College of Medicine, University of Illinois at Chicago
- Department of Pharmacology and Regenerative Medicine, College of Medicine,University of Illinois at Chicago
| | - Dawood Darbar
- Division of Cardiology, Department of Medicine, College of Medicine, University of Illinois at Chicago
- Department of Physiology and Biophysics and the Center for Cardiovascular Research, University of Illinois at Chicago
- Jesse Brown VA Medical Center, Chicago, IL
| | - Kerry S. McDonald
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia
| | - Craig J. Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN
| | - Beata M. Wolska
- Division of Cardiology, Department of Medicine, College of Medicine, University of Illinois at Chicago
- Department of Physiology and Biophysics and the Center for Cardiovascular Research, University of Illinois at Chicago
| | - Dobromir Dobrev
- Institute of Pharmacology, West German Heart and Vascular Center, University Duisburg-Essen, Germany
- Department of Integrative Physiology and The Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX
- Department of Medicine, Montréal Heart Institute and Université de Montréal, Montréal, Canada
| | - Xander H.T. Wehrens
- Department of Integrative Physiology and The Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX
| | - Mark D. McCauley
- Division of Cardiology, Department of Medicine, College of Medicine, University of Illinois at Chicago
- Department of Physiology and Biophysics and the Center for Cardiovascular Research, University of Illinois at Chicago
- Jesse Brown VA Medical Center, Chicago, IL
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13
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Hegner A, Cebull HL, Gámez AJ, Blase C, Goergen CJ, Wittek A. Biomechanical characterization of tissue types in murine dissecting aneurysms based on histology and 4D ultrasound-derived strain. Biomech Model Mechanobiol 2023; 22:1773-1788. [PMID: 37707685 PMCID: PMC10511389 DOI: 10.1007/s10237-023-01759-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 07/26/2023] [Indexed: 09/15/2023]
Abstract
Abdominal aortic aneurysm disease is the local enlargement of the aorta, typically in the infrarenal section, causing up to 200,000 deaths/year. In vivo information to characterize the individual elastic properties of the aneurysm wall in terms of rupture risk is lacking. We used a method that combines 4D ultrasound and direct deformation estimation to compute in vivo 3D Green-Lagrange strain in murine angiotensin II-induced dissecting aortic aneurysms, a commonly used mouse model. After euthanasia, histological staining of cross-sectional sections along the aorta was performed in areas where in vivo strains had previously been measured. The histological sections were segmented into intact and fragmented elastin, thrombus with and without red blood cells, and outer vessel wall including the adventitia. Meshes were then created from the individual contours based on the histological segmentations. The isolated contours of the outer wall and lumen from both imaging modalities were registered individually using a coherent point drift algorithm. 2D finite element models were generated from the meshes, and the displacements from the registration were used as displacement boundaries of the lumen and wall contours. Based on the resulting deformed contours, the strains recorded were grouped according to segmented tissue regions. Strains were highest in areas containing intact elastin without thrombus attachment. Strains in areas with intact elastin and thrombus attachment, as well as areas with disrupted elastin, were significantly lower. Strains in thrombus regions with red blood cells were significantly higher compared to thrombus regions without. We then compared this analysis to statistical distribution indices and found that the results of each aligned, elucidating the relationship between vessel strain and structural changes. This work demonstrates the possibility of advancing in vivo assessments to a microstructural level ultimately improving patient outcomes.
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Affiliation(s)
- Achim Hegner
- Personalized Biomedical Engineering Lab, Frankfurt University of Applied Sciences, Frankfurt am Main, Germany
- Department of Mechanical Engineering and Industrial Design, School of Engineering, University of Cadiz, Cadiz, Spain
| | - Hannah L. Cebull
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, USA
- Department of Radiology and Imaging Sciences, Emory University, Atlanta, USA
| | - Antonio J. Gámez
- Department of Mechanical Engineering and Industrial Design, School of Engineering, University of Cadiz, Cadiz, Spain
| | - Christopher Blase
- Personalized Biomedical Engineering Lab, Frankfurt University of Applied Sciences, Frankfurt am Main, Germany
- Cell and Vascular Mechanics, Goethe University, Frankfurt am Main, Germany
| | - Craig J. Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, USA
| | - Andreas Wittek
- Personalized Biomedical Engineering Lab, Frankfurt University of Applied Sciences, Frankfurt am Main, Germany
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14
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Damen FW, Gramling DP, Ahlf Wheatcraft D, Wilpan RY, Costa MW, Goergen CJ. Application of 4-D ultrasound-derived regional strain and proteomics analysis in Nkx2-5-deficient male mice. Am J Physiol Heart Circ Physiol 2023; 325:H293-H310. [PMID: 37326999 PMCID: PMC10393333 DOI: 10.1152/ajpheart.00733.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 04/26/2023] [Accepted: 05/09/2023] [Indexed: 06/17/2023]
Abstract
The comprehensive characterization of cardiac structure and function is critical to better understanding various murine models of cardiac disease. We demonstrate here a multimodal analysis approach using high-frequency four-dimensional ultrasound (4DUS) imaging and proteomics to explore the relationship between regional function and tissue composition in a murine model of metabolic cardiomyopathy (Nkx2-5183P/+). The presented 4DUS analysis outlines a novel approach to mapping both circumferential and longitudinal strain profiles through a standardized framework. We then demonstrate how this approach allows for spatiotemporal comparisons of cardiac function and improved localization of regional left ventricular dysfunction. Guided by observed trends in regional dysfunction, our targeted Ingenuity Pathway Analysis (IPA) results highlight metabolic dysregulation in the Nkx2-5183P/+ model, including altered mitochondrial function and energy metabolism (i.e., oxidative phosphorylation and fatty acid/lipid handling). Finally, we present a combined 4DUS-proteomics z-score-based analysis that highlights IPA canonical pathways showing strong linear relationships with 4DUS biomarkers of regional cardiac dysfunction. The presented multimodal analysis methods aim to help future studies more comprehensively assess regional structure-function relationships in other preclinical models of cardiomyopathy.NEW & NOTEWORTHY A multimodal approach using both four-dimensional ultrasound (4DUS) and regional proteomics can help enhance our investigations of murine cardiomyopathy models. We present unique 4DUS-derived strain maps that provide a framework for both cross-sectional and longitudinal analysis of spatiotemporal cardiac function. We further detail and demonstrate an innovative 4DUS-proteomics z-score-based linear regression method, aimed at characterizing relationships between regional cardiac dysfunction and underlying mechanisms of disease.
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Affiliation(s)
- Frederick W Damen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, United States
- Indiana University School of Medicine, Indianapolis, Indiana, United States
| | - Daniel P Gramling
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, United States
| | | | | | - Mauro W Costa
- Jackson Laboratory, Bar Harbor, Maine, United States
- Gladstone Institute of Cardiovascular Disease, San Francisco, California, United States
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, United States
- Indiana University School of Medicine, Indianapolis, Indiana, United States
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15
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Perike S, Gonzalez-Gonzalez FJ, Abu-Taha I, Damen FW, Lizama KS, Aboonabi A, Capote AE, Aguilar-Sanchez Y, Levin B, Han Z, Sridhar A, Grand J, Martin J, Akar JG, Warren CM, Solaro RJ, Ong SG, Darbar D, Goergen CJ, Wolska BM, Dobrev D, Wehrens XHT, McCauley MD. Myosin Light Chain Dephosphorylation by PPP1R12C Promotes Atrial Hypocontractility in Atrial Fibrillation. bioRxiv 2023:2023.04.19.537590. [PMID: 37131731 PMCID: PMC10153354 DOI: 10.1101/2023.04.19.537590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Background Atrial fibrillation (AF), the most common sustained cardiac arrhythmia, increases thromboembolic stroke risk five-fold. Although atrial hypocontractility contributes to stroke risk in AF, the molecular mechanisms reducing myofilament contractile function remain unknown. We tested the hypothesis that increased expression of PPP1R12C, the PP1 regulatory subunit targeting atrial myosin light chain 2 (MLC2a), causes hypophosphorylation of MLC2a and results in atrial hypocontractility. Methods Right atrial appendage tissues were isolated from human AF patients versus sinus rhythm (SR) controls. Western blots, co-immunoprecipitation, and phosphorylation studies were performed to examine how the PP1c-PPP1R12C interaction causes MLC2a de-phosphorylation. In vitro studies of pharmacologic MRCK inhibitor (BDP5290) in atrial HL-1 cells were performed to evaluate PP1 holoenzyme activity on MLC2a. Cardiac-specific lentiviral PPP1R12C overexpression was performed in mice to evaluate atrial remodeling with atrial cell shortening assays, echocardiography, and AF inducibility with EP studies. Results In human patients with AF, PPP1R12C expression was increased two-fold versus SR controls ( P =2.0×10 -2 , n=12,12 in each group) with > 40% reduction in MLC2a phosphorylation ( P =1.4×10 -6 , n=12,12 in each group). PPP1R12C-PP1c binding and PPP1R12C-MLC2a binding were significantly increased in AF ( P =2.9×10 -2 and 6.7×10 -3 respectively, n=8,8 in each group). In vitro studies utilizing drug BDP5290, which inhibits T560-PPP1R12C phosphorylation, demonstrated increased PPP1R12C binding with both PP1c and MLC2a, and dephosphorylation of MLC2a. Lenti-12C mice demonstrated a 150% increase in LA size versus controls ( P =5.0×10 -6 , n=12,8,12), with reduced atrial strain and atrial ejection fraction. Pacing-induced AF in Lenti-12C mice was significantly higher than controls ( P =1.8×10 -2 and 4.1×10 -2 respectively, n= 6,6,5). Conclusions AF patients exhibit increased levels of PPP1R12C protein compared to controls. PPP1R12C overexpression in mice increases PP1c targeting to MLC2a and causes MLC2a dephosphorylation, which reduces atrial contractility and increases AF inducibility. These findings suggest that PP1 regulation of sarcomere function at MLC2a is a key determinant of atrial contractility in AF.
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16
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Muskat JC, Babbs CF, Goergen CJ, Rayz VL. Method for estimating pulsatile wall shear stress from one-dimensional velocity waveforms. Physiol Rep 2023; 11:e15628. [PMID: 37066977 PMCID: PMC10108024 DOI: 10.14814/phy2.15628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 02/03/2023] [Accepted: 02/12/2023] [Indexed: 04/18/2023] Open
Abstract
Wall shear stress (WSS)-a key regulator of endothelial function-is commonly estimated in vivo using simplified mathematical models based on Poiseuille's flow, assuming a quasi-steady parabolic velocity distribution, despite evidence that more rapidly time-varying, pulsatile blood flow during each cardiac cycle modulates flow-mediated dilation (FMD) in large arteries of healthy subjects. More exact and accurate models based on the well-established Womersley solution for rapidly changing blood flow have not been adopted clinically, potentially because the Womersley solution relies on the local pressure gradient, which is difficult to measure non-invasively. We have developed an open-source method for automatic reconstruction of unsteady, Womersley-derived velocity profiles, and WSS in conduit arteries. The proposed method (available online at https://doi.org/10.5281/zenodo.7576408) requires only the time-averaged diameter of the vessel and time-varying velocity data available from non-invasive imaging such as Doppler ultrasound. Validation of the method with subject-specific computational fluid dynamics and application to synthetic velocity waveforms in the common carotid, brachial, and femoral arteries reveals that the Poiseuille solution underestimates peak WSS 38.5%-55.1% during the acceleration and deceleration phases of systole and underestimates or neglects retrograde WSS. Following evidence that oscillatory shear significantly augments vasodilator production, it is plausible that mischaracterization of the shear stimulus by assuming parabolic flow leads to systematic underestimates of important biological effects of time-varying blood velocity in conduit arteries.
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Affiliation(s)
- J C Muskat
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
| | - C F Babbs
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
| | - C J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
| | - V L Rayz
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
- Mechanical Engineering, Purdue University, West Lafayette, Indiana, USA
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17
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Gu D, Soepriatna AH, Zhang W, Li J, Zhao J, Zhang X, Shu X, Wang Y, Landis BJ, Goergen CJ, Xie J. Activation of the Hedgehog signaling pathway leads to fibrosis in aortic valves. Cell Biosci 2023; 13:43. [PMID: 36864465 PMCID: PMC9983197 DOI: 10.1186/s13578-023-00980-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 02/03/2023] [Indexed: 03/04/2023] Open
Abstract
BACKGROUND Fibrosis is a pathological wound healing process characterized by excessive extracellular matrix deposition, which interferes with normal organ function and contributes to ~ 45% of human mortality. Fibrosis develops in response to chronic injury in nearly all organs, but the a cascade of events leading to fibrosis remains unclear. While hedgehog (Hh) signaling activation has been associated with fibrosis in the lung, kidney, and skin, it is unknown whether hedgehog signaling activation is the cause or the consequence of fibrosis. We hypothesize that activation of hedgehog signaling is sufficient to drive fibrosis in mouse models. RESULTS In this study, we provide direct evidence to show that activation of Hh signaling via expression of activated smoothened, SmoM2, is sufficient to induce fibrosis in the vasculature and aortic valves. We showed that activated SmoM2 -induced fibrosis is associated with abnormal function of aortic valves and heart. The relevance of this mouse model to human health is reflected in our findings that elevated GLI expression is detected in 6 out of 11 aortic valves from patients with fibrotic aortic valves. CONCLUSIONS Our data show that activating hedgehog signaling is sufficient to drive fibrosis in mice, and this mouse model is relevant to human aortic valve stenosis.
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Affiliation(s)
- Dongsheng Gu
- grid.257413.60000 0001 2287 3919Department of Pediatrics, Indiana University School of Medicine, Wells Center for Pediatric Research, 1040 W. Walnut Street., Indianapolis, IN 46202 USA
| | - Arvin H. Soepriatna
- grid.169077.e0000 0004 1937 2197Purdue University Weldon School of Biomedical Engineering, 206 S. Martin Jischke Drive, Room 3025, West Lafayette, IN 47907 USA ,grid.40263.330000 0004 1936 9094School of Engineering, Center for Biomedical Engineering, Brown University, 184 Hope Street, Providence, RI 02912 USA
| | - Wenjun Zhang
- grid.257413.60000 0001 2287 3919Department of Pediatrics, Indiana University School of Medicine, Wells Center for Pediatric Research, 1040 W. Walnut Street., Indianapolis, IN 46202 USA
| | - Jun Li
- grid.413087.90000 0004 1755 3939Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital Fudan University, 180 Fenglin Road, Shanghai, 200032 China
| | - Jenny Zhao
- grid.257413.60000 0001 2287 3919Department of Pediatrics, Indiana University School of Medicine, Wells Center for Pediatric Research, 1040 W. Walnut Street., Indianapolis, IN 46202 USA ,grid.189504.10000 0004 1936 7558Boston University School of Medicine, 72 E. Concord St., Boston, MA 02118 USA
| | - Xiaoli Zhang
- grid.257413.60000 0001 2287 3919Department of Pediatrics, Indiana University School of Medicine, Wells Center for Pediatric Research, 1040 W. Walnut Street., Indianapolis, IN 46202 USA
| | - Xianhong Shu
- grid.413087.90000 0004 1755 3939Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital Fudan University, 180 Fenglin Road, Shanghai, 200032 China
| | - Yongshi Wang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital Fudan University, 180 Fenglin Road, Shanghai, 200032, China.
| | - Benjamin J. Landis
- grid.257413.60000 0001 2287 3919Department of Pediatrics, Indiana University School of Medicine, Wells Center for Pediatric Research, 1040 W. Walnut Street., Indianapolis, IN 46202 USA
| | - Craig J. Goergen
- grid.169077.e0000 0004 1937 2197Purdue University Weldon School of Biomedical Engineering, 206 S. Martin Jischke Drive, Room 3025, West Lafayette, IN 47907 USA
| | - Jingwu Xie
- Department of Pediatrics, Indiana University School of Medicine, Wells Center for Pediatric Research, 1040 W. Walnut Street., Indianapolis, IN, 46202, USA. .,Basic and Translational Cancer Review Branch (BTC), Division of Basic and Integrative Biological Sciences (DBIB), Center for Scientific Review, National Institutes of Health, 6701 Rockledge Drive, Bethesda, MD, 20892, USA.
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18
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Schepers LE, Chernysh IN, Albrecht CK, Browning LC, Hillsdon-Smith ML, Cox AD, Weisel JW, Goergen CJ. Aortic Dissection Detection and Thrombus Structure Quantification Using Volumetric Ultrasound, Histology, and Scanning Electron Microscopy. JVS Vasc Sci 2023. [DOI: 10.1016/j.jvssci.2023.100105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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19
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Earl CC, Pyle VI, Clark SQ, Annamalai K, Torres PA, Quintero A, Damen FW, Hor KN, Markham LW, Soslow JH, Goergen CJ. Localized strain characterization of cardiomyopathy in Duchenne muscular dystrophy using novel 4D kinematic analysis of cine cardiovascular magnetic resonance. J Cardiovasc Magn Reson 2023; 25:14. [PMID: 36793101 PMCID: PMC9933368 DOI: 10.1186/s12968-023-00922-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 01/21/2023] [Indexed: 02/17/2023] Open
Abstract
BACKGROUND Cardiomyopathy (CMP) is the most common cause of mortality in Duchenne muscular dystrophy (DMD), though the age of onset and clinical progression vary. We applied a novel 4D (3D + time) strain analysis method using cine cardiovascular magnetic resonance (CMR) imaging data to determine if localized strain metrics derived from 4D image analysis would be sensitive and specific for characterizing DMD CMP. METHODS We analyzed short-axis cine CMR image stacks from 43 DMD patients (median age: 12.23 yrs [10.6-16.5]; [interquartile range]) and 25 male healthy controls (median age: 16.2 yrs [13.3-20.7]). A subset of 25 male DMD patients age-matched to the controls (median age: 15.7 yrs [14.0-17.8]) was used for comparative metrics. CMR images were compiled into 4D sequences for feature-tracking strain analysis using custom-built software. Unpaired t-test and receiver operator characteristic area under the curve (AUC) analysis were used to determine statistical significance. Spearman's rho was used to determine correlation. RESULTS DMD patients had a range of CMP severity: 15 (35% of total) had left ventricular ejection fraction (LVEF) > 55% with no findings of myocardial late gadolinium enhancement (LGE), 15 (35%) had findings of LGE with LVEF > 55% and 13 (30%) had LGE with LVEF < 55%. The magnitude of the peak basal circumferential strain, basal radial strain, and basal surface area strain were all significantly decreased in DMD patients relative to healthy controls (p < 0.001) with AUC values of 0.80, 0.89, and 0.84 respectively for peak strain and 0.96, 0.91, and 0.98 respectively for systolic strain rate. Peak basal radial strain, basal radial systolic strain rate, and basal circumferential systolic strain rate magnitude values were also significantly decreased in mild CMP (No LGE, LVEF > 55%) compared to a healthy control group (p < 0.001 for all). Surface area strain significantly correlated with LVEF and extracellular volume (ECV) respectively in the basal (rho = - 0.45, 0.40), mid (rho = - 0.46, 0.46), and apical (rho = - 0.42, 0.47) regions. CONCLUSION Strain analysis of 3D cine CMR images in DMD CMP patients generates localized kinematic parameters that strongly differentiate disease from control and correlate with LVEF and ECV.
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Affiliation(s)
- Conner C Earl
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Dr., West Lafayette, IN, 47907, USA
- Indiana University School of Medicine, Indianapolis, IN, USA
| | - Victoria I Pyle
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Dr., West Lafayette, IN, 47907, USA
| | - Sydney Q Clark
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Dr., West Lafayette, IN, 47907, USA
- Indiana University School of Medicine, Indianapolis, IN, USA
| | - Karthik Annamalai
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Dr., West Lafayette, IN, 47907, USA
| | - Paula A Torres
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Dr., West Lafayette, IN, 47907, USA
| | - Alejandro Quintero
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Dr., West Lafayette, IN, 47907, USA
| | - Frederick W Damen
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Dr., West Lafayette, IN, 47907, USA
- Indiana University School of Medicine, Indianapolis, IN, USA
| | - Kan N Hor
- The Heart Center, Nationwide Children's Hospital, Ohio State University, Columbus, OH, USA
| | - Larry W Markham
- Division of Pediatric Cardiology, Riley Children's Hospital at Indiana University Health, Indianapolis, IN, USA
- Indiana University School of Medicine, Indianapolis, IN, USA
| | - Jonathan H Soslow
- Division of Pediatric Cardiology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Dr., West Lafayette, IN, 47907, USA.
- Indiana University School of Medicine, Indianapolis, IN, USA.
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20
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Moravec KR, Lothamer EL, Hoene A, Wagoner PM, Beckman DJ, Goergen CJ. Clinical Immersion of Undergraduate Biomedical Engineering Students: Best Practices for Short-Term Programs. Biomed Eng Educ 2023; 3:1-7. [PMID: 36778754 PMCID: PMC9897606 DOI: 10.1007/s43683-022-00097-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 12/12/2022] [Indexed: 02/05/2023]
Abstract
Many biomedical engineering degree programs lack substantial immersive clinical experiences for undergraduate students, creating a need for clinical immersion programs that contribute to training objectives that emphasize current clinical needs (Becker in Eur J Eng Educ 31:261-272, 2006; Davis et al. in J Eng Educ 91:211-221, 2002; Dym et al. in J Eng Educ 94:103-120, 2005). Immersive clinical experiences have the potential to bridge the gap between clinical and non-clinical learning objectives in biomedical engineering curriculum. In collaboration with Indiana University Health Methodist Hospital, we have created, executed, and evaluated a two-week cardiovascular clinical immersion program for biomedical engineering undergraduate students at Purdue University. As of August 2022, this program has run 11 times since 2014 with 60 participants to date, exposing students to intensive and non-intensive care environments, facilitating interactions with medical professionals, and encouraging exploration of innovative technologies shaping the training of clinicians with direct patient interaction. The variety of cardiovascular topics discussed and clinical settings observed has provided students with a unique, highly beneficial learning opportunity. Keys to the continued success and growth of similar programs include: recruiting a diverse team, support from administrative staff/clinicians, a funded student intern position, and careful consideration of liability/risk management. Areas of future consideration include, streamlining the order of scheduled events, determining if offering course credit would be beneficial to students, and tracking career trajectories after participations.
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Affiliation(s)
- Katherine R. Moravec
- Indiana University Health Methodist Hospital, Indianapolis, IN USA
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN USA
| | - Emily L. Lothamer
- Indiana University Health Methodist Hospital, Indianapolis, IN USA
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN USA
| | - Amy Hoene
- Indiana University Health Methodist Hospital, Indianapolis, IN USA
| | - P. Mike Wagoner
- Indiana University Health Methodist Hospital, Indianapolis, IN USA
| | - Daniel J. Beckman
- Indiana University Health Methodist Hospital, Indianapolis, IN USA
- Indiana University School of Medicine, West Lafayette, IN USA
| | - Craig J. Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN USA
- Indiana University School of Medicine, West Lafayette, IN USA
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21
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Leyba K, Paiyabhroma N, Salvas JP, Damen FW, Janvier A, Zub E, Bernis C, Rouland R, Dubois CJ, Badaut J, Richard S, Marchi N, Goergen CJ, Sicard P. Neurovascular hypoxia after mild traumatic brain injury in juvenile mice correlates with heart-brain dysfunctions in adulthood. Acta Physiol (Oxf) 2023; 238:e13933. [PMID: 36625322 DOI: 10.1111/apha.13933] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 12/20/2022] [Accepted: 01/02/2023] [Indexed: 01/11/2023]
Abstract
AIM Retrospective studies suggest that mild traumatic brain injury (mTBI) in pediatric patients may lead to an increased risk of cardiac events. However, the exact functional and temporal dynamics and the associations between heart and brain pathophysiological trajectories are not understood. METHODS A single impact to the left somatosensory cortical area of the intact skull was performed on juvenile mice (17 days postnatal). Cerebral 3D photoacoustic imaging was used to measure the oxygen saturation (sO2 ) in the impacted area 4 h after mTBI followed by 2D and 4D echocardiography at days 7, 30, 90, and 190 post-impact. At 8 months, we performed a dobutamine stress test to evaluate cardiac function. Lastly, behavioral analyses were conducted 1 year after initial injury. RESULTS We report a rapid and transient decrease in cerebrovascular sO2 and increased hemoglobin in the impacted left brain cortex. Cardiac analyses showed long-term diastolic dysfunction and a diminished systolic strain response under stress in the mTBI group. At the molecular level, cardiac T-p38MAPK and troponin I expression was pathologic modified post-mTBI. We found linear correlations between brain sO2 measured immediately post-mTBI and long-term cardiac strain after 8 months. We report that initial cerebrovascular hypoxia and chronic cardiac dysfunction correlated with long-term behavioral changes hinting at anxiety-like and memory maladaptation. CONCLUSION Experimental juvenile mTBI induces time-dependent cardiac dysfunction that corresponds to the initial neurovascular sO2 dip and is associated with long-term behavioral modifications. These imaging biomarkers of the heart-brain axis could be applied to improve clinical pediatric mTBI management.
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Affiliation(s)
- Katherine Leyba
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
| | - Nitchawat Paiyabhroma
- PhyMedExp, INSERM/CNRS/Université de Montpellier, IPAM/Biocampus, Montpellier, France
| | - John P Salvas
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
| | - Frederick W Damen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
| | - Alicia Janvier
- Institute de Genomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Emma Zub
- Institute de Genomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Corinne Bernis
- Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Inserm/Université Paul Sabatier UMR1048, Toulouse, France
| | | | | | - Jerome Badaut
- Univ. Bordeaux, CNRS, CRMSB, UMR 5536, Bordeaux, France
| | - Sylvain Richard
- PhyMedExp, INSERM/CNRS/Université de Montpellier, IPAM/Biocampus, Montpellier, France
| | - Nicola Marchi
- Institute de Genomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
| | - Pierre Sicard
- PhyMedExp, INSERM/CNRS/Université de Montpellier, IPAM/Biocampus, Montpellier, France
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22
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Earl CC, Soslow JH, Markham LW, Goergen CJ. Myocardial strain imaging in Duchenne muscular dystrophy. Front Cardiovasc Med 2022; 9:1031205. [PMID: 36505382 PMCID: PMC9727102 DOI: 10.3389/fcvm.2022.1031205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 11/03/2022] [Indexed: 11/24/2022] Open
Abstract
Cardiomyopathy (CM) is the leading cause of death for individuals with Duchenne muscular dystrophy (DMD). While DMD CM progresses rapidly and fatally for some in teenage years, others can live relatively symptom-free into their thirties or forties. Because CM progression is variable, there is a critical need for biomarkers to detect early onset and rapid progression. Despite recent advances in imaging and analysis, there are still no reliable methods to detect the onset or progression rate of DMD CM. Cardiac strain imaging is a promising technique that has proven valuable in DMD CM assessment, though much more work has been done in adult CM patients. In this review, we address the role of strain imaging in DMD, the mechanical and functional parameters used for clinical assessment, and discuss the gaps where emerging imaging techniques could help better characterize CM progression in DMD. Prominent among these emerging techniques are strain assessment from 3D imaging and development of deep learning algorithms for automated strain assessment. Improved techniques in tracking the progression of CM may help to bridge a crucial gap in optimizing clinical treatment for this devastating disease and pave the way for future research and innovation through the definition of robust imaging biomarkers and clinical trial endpoints.
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Affiliation(s)
- Conner C. Earl
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, United States
- Indiana University School of Medicine, Indianapolis, IN, United States
| | - Jonathan H. Soslow
- Division of Pediatric Cardiology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Larry W. Markham
- Division of Pediatric Cardiology, Riley Children's Hospital, Indiana University Health, Indianapolis, IN, United States
| | - Craig J. Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, United States
- Indiana University School of Medicine, Indianapolis, IN, United States
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23
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Lottes AE, Cavanaugh KJ, Chan YYF, Devlin VJ, Goergen CJ, Jean R, Linnes JC, Malone M, Peat R, Reuter DG, Taylor K, Wodicka GR. Navigating the Regulatory Pathway for Medical Devices-a Conversation with the FDA, Clinicians, Researchers, and Industry Experts. J Cardiovasc Transl Res 2022; 15:927-943. [PMID: 35288821 PMCID: PMC8920055 DOI: 10.1007/s12265-022-10232-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Accepted: 03/04/2022] [Indexed: 11/26/2022]
Abstract
Successful translation of new and innovative medical products from concept to clinical use is a complex endeavor that requires understanding and overcoming a variety of challenges. In particular, regulatory pathways and processes are often unfamiliar to academic researchers and start-ups, and even larger companies. Growing evidence suggests that the successful translation of ideas to products requires collaboration and cooperation between clinicians, researchers, industry, and regulators. A multi-stakeholder group developed this review to enhance regulatory knowledge and thereby improve translational success for medical devices. Communication between and among stakeholders is identified as a critical factor. Current regulatory programs and processes to facilitate communication and translation of innovative devices are described and discussed. Case studies are used to highlight the importance of flexibility when considering evidence requirements. We provide a review of emerging strategies, opportunities, and best practices to increase the regulatory knowledge base and facilitate medical device translation by all stakeholders. Clinicians, regulators, industry, and researchers require regulatory knowledge and collaboration for successful translation of innovative medical devices.
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Affiliation(s)
- Aaron E Lottes
- Purdue University Weldon School of Biomedical Engineering, West Lafayette, IN, USA.
| | - Kenneth J Cavanaugh
- Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, MD, USA
| | | | - Vincent J Devlin
- Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, MD, USA
| | - Craig J Goergen
- Purdue University Weldon School of Biomedical Engineering, West Lafayette, IN, USA
| | - Ronald Jean
- Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, MD, USA
| | - Jacqueline C Linnes
- Purdue University Weldon School of Biomedical Engineering, West Lafayette, IN, USA
| | - Misti Malone
- Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, MD, USA
| | - Raquel Peat
- Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, MD, USA
| | - David G Reuter
- Seattle Children's Hospital, Allegro Pediatrics, Seattle, WA, USA
| | - Kay Taylor
- Becton Dickinson & Company, Indianapolis, IN, USA
| | - George R Wodicka
- Purdue University Weldon School of Biomedical Engineering, West Lafayette, IN, USA
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24
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Goergen CJ, Tweardy MJ, Steinhubl SR, Wegerich SW, Singh K, Mieloszyk RJ, Dunn J. Detection and Monitoring of Viral Infections via Wearable Devices and Biometric Data. Annu Rev Biomed Eng 2022; 24:1-27. [PMID: 34932906 PMCID: PMC9218991 DOI: 10.1146/annurev-bioeng-103020-040136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Mounting clinical evidence suggests that viral infections can lead to detectable changes in an individual's normal physiologic and behavioral metrics, including heart and respiration rates, heart rate variability, temperature, activity, and sleep prior to symptom onset, potentially even in asymptomatic individuals. While the ability of wearable devices to detect viral infections in a real-world setting has yet to be proven, multiple recent studies have established that individual, continuous data from a range of biometric monitoring technologies can be easily acquired and that through the use of machine learning techniques, physiological signals and warning signs can be identified. In this review, we highlight the existing knowledge base supporting the potential for widespread implementation of biometric data to address existing gaps in the diagnosis and treatment of viral illnesses, with a particular focus on the many important lessons learned from the coronavirus disease 2019 pandemic.
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Affiliation(s)
- Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA;
| | | | - Steven R Steinhubl
- physIQ Inc., Chicago, Illinois, USA
- Scripps Research Translational Institute, La Jolla, California, USA
| | | | - Karnika Singh
- Department of Biomedical Engineering, Duke University, Durham, North Carolina, USA
| | | | - Jessilyn Dunn
- Department of Biomedical Engineering, Duke University, Durham, North Carolina, USA
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25
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Dann MM, Clark SQ, Trzaskalski NA, Earl CC, Schepers LE, Pulente SM, Lennord EN, Annamalai K, Gruber JM, Cox AD, Lorenzen-Schmidt I, Seymour R, Kim KH, Goergen CJ, Mulvihill EE. Quantification of murine myocardial infarct size using 2-D and 4-D high-frequency ultrasound. Am J Physiol Heart Circ Physiol 2022; 322:H359-H372. [PMID: 34995167 PMCID: PMC8836752 DOI: 10.1152/ajpheart.00476.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 12/17/2021] [Accepted: 01/03/2022] [Indexed: 02/03/2023]
Abstract
Ischemic heart disease is the leading cause of death in the United States, Canada, and worldwide. Severe disease is characterized by coronary artery occlusion, loss of blood flow to the myocardium, and necrosis of tissue, with subsequent remodeling of the heart wall, including fibrotic scarring. The current study aims to demonstrate the efficacy of quantitating infarct size via two-dimensional (2-D) echocardiographic akinetic length and four-dimensional (4-D) echocardiographic infarct volume and surface area as in vivo analysis techniques. We further describe and evaluate a new surface area strain analysis technique for estimating myocardial infarction (MI) size after ischemic injury. Experimental MI was induced in mice via left coronary artery ligation. Ejection fraction and infarct size were measured through 2-D and 4-D echocardiography. Infarct size established via histology was compared with ultrasound-based metrics via linear regression analysis. Two-dimensional echocardiographic akinetic length (r = 0.76, P = 0.03), 4-D echocardiographic infarct volume (r = 0.85, P = 0.008), and surface area (r = 0.90, P = 0.002) correlate well with histology. Although both 2-D and 4-D echocardiography were reliable measurement techniques to assess infarct, 4-D analysis is superior in assessing asymmetry of the left ventricle and the infarct. Strain analysis performed on 4-D data also provides additional infarct sizing techniques, which correlate with histology (surface strain: r = 0.94, P < 0.001, transmural thickness: r = 0.76, P = 0.001). Two-dimensional echocardiographic akinetic length, 4-D echocardiography ultrasound, and strain provide effective in vivo methods for measuring fibrotic scarring after MI.NEW & NOTEWORTHY Our study supports that both 2-D and 4-D echocardiographic analysis techniques are reliable in quantifying infarct size though 4-D ultrasound provides a more holistic image of LV function and structure, especially after myocardial infarction. Furthermore, 4-D strain analysis correctly identifies infarct size and regional LV dysfunction after MI. Therefore, these techniques can improve functional insight into the impact of pharmacological interventions on the pathophysiology of cardiac disease.
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Affiliation(s)
- Melissa M Dann
- Faculty of Medicine, Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario, Canada
- University of Ottawa Heart Institute, Ottawa, Ontario, Canada
- Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Sydney Q Clark
- Indiana University School of Medicine, Indianapolis, Indiana
| | - Natasha A Trzaskalski
- Faculty of Medicine, Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario, Canada
- University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Conner C Earl
- Indiana University School of Medicine, Indianapolis, Indiana
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
| | - Luke E Schepers
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
| | - Serena M Pulente
- Faculty of Medicine, Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario, Canada
- University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Ebonee N Lennord
- Faculty of Medicine, Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario, Canada
- University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Karthik Annamalai
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
| | - Joseph M Gruber
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
| | - Abigail D Cox
- Department of Comparative Pathobiology, Purdue University, West Lafayette, Indiana
| | | | - Richard Seymour
- University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Kyoung-Han Kim
- University of Ottawa Heart Institute, Ottawa, Ontario, Canada
- Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Craig J Goergen
- Indiana University School of Medicine, Indianapolis, Indiana
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
- Department of Surgery, Indiana University School of Medicine, West Lafayette, Indiana
| | - Erin E Mulvihill
- Faculty of Medicine, Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario, Canada
- University of Ottawa Heart Institute, Ottawa, Ontario, Canada
- Montreal Diabetes Research Group, Montreal, Quebec, Canada
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26
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Sangha GS, Hu B, Li G, Fox SE, Sholl AB, Brown JQ, Goergen CJ. Assessment of photoacoustic tomography contrast for breast tissue imaging using 3D correlative virtual histology. Sci Rep 2022; 12:2532. [PMID: 35169198 PMCID: PMC8847353 DOI: 10.1038/s41598-022-06501-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Accepted: 01/25/2022] [Indexed: 11/12/2022] Open
Abstract
Current breast tumor margin detection methods are destructive, time-consuming, and result in significant reoperative rates. Dual-modality photoacoustic tomography (PAT) and ultrasound has the potential to enhance breast margin characterization by providing clinically relevant compositional information with high sensitivity and tissue penetration. However, quantitative methods that rigorously compare volumetric PAT and ultrasound images with gold-standard histology are lacking, thus limiting clinical validation and translation. Here, we present a quantitative multimodality workflow that uses inverted Selective Plane Illumination Microscopy (iSPIM) to facilitate image co-registration between volumetric PAT-ultrasound datasets with histology in human invasive ductal carcinoma breast tissue samples. Our ultrasound-PAT system consisted of a tunable Nd:YAG laser coupled with a 40 MHz central frequency ultrasound transducer. A linear stepper motor was used to acquire volumetric PAT and ultrasound breast biopsy datasets using 1100 nm light to identify hemoglobin-rich regions and 1210 nm light to identify lipid-rich regions. Our iSPIM system used 488 nm and 647 nm laser excitation combined with Eosin and DRAQ5, a cell-permeant nucleic acid binding dye, to produce high-resolution volumetric datasets comparable to histology. Image thresholding was applied to PAT and iSPIM images to extract, quantify, and topologically visualize breast biopsy lipid, stroma, hemoglobin, and nuclei distribution. Our lipid-weighted PAT and iSPIM images suggest that low lipid regions strongly correlate with malignant breast tissue. Hemoglobin-weighted PAT images, however, correlated poorly with cancerous regions determined by histology and interpreted by a board-certified pathologist. Nuclei-weighted iSPIM images revealed similar cellular content in cancerous and non-cancerous tissues, suggesting malignant cell migration from the breast ducts to the surrounding tissues. We demonstrate the utility of our nondestructive, volumetric, region-based quantitative method for comprehensive validation of 3D tomographic imaging methods suitable for bedside tumor margin detection.
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Affiliation(s)
- Gurneet S Sangha
- Fischell Department of Bioengineering, University of Maryland, 8278 Paint Branch Dr, College Park, MD, 20742, USA.,Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Dr., West Lafayette, IN, 47907, USA
| | - Bihe Hu
- Department of Biomedical Engineering, Tulane University, 547 Lindy Boggs Center, New Orleans, LA, 70118, USA
| | - Guang Li
- Department of Biomedical Engineering, Tulane University, 547 Lindy Boggs Center, New Orleans, LA, 70118, USA
| | - Sharon E Fox
- Department of Pathology, LSU Health Sciences Center, New Orleans, 433 Bolivar St, New Orleans, LA, 70112, USA.,Pathology and Laboratory Medicine Service, Southeast Louisiana Veterans Healthcare System, 2400 Canal Street, New Orleans, LA, 70112, USA
| | - Andrew B Sholl
- Delta Pathology Group, Touro Infirmary, 1401 Foucher St, New Orleans, LA, 70115, USA
| | - J Quincy Brown
- Department of Biomedical Engineering, Tulane University, 547 Lindy Boggs Center, New Orleans, LA, 70118, USA
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Dr., West Lafayette, IN, 47907, USA. .,Purdue University Center for Cancer Research, Purdue University, 201 S. University St., West Lafayette, IN, 47907, USA.
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27
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Berman AG, Romary DJ, Kerr KE, Gorazd NE, Wigand MM, Patnaik SS, Finol EA, Cox AD, Goergen CJ. Experimental aortic aneurysm severity and growth depend on topical elastase concentration and lysyl oxidase inhibition. Sci Rep 2022; 12:99. [PMID: 34997075 PMCID: PMC8742076 DOI: 10.1038/s41598-021-04089-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Accepted: 12/15/2021] [Indexed: 11/23/2022] Open
Abstract
Abdominal aortic aneurysm (AAA) formation and expansion is highly complex and multifactorial, and the improvement of animal models is an important step to enhance our understanding of AAA pathophysiology. In this study, we explore our ability to influence aneurysm growth in a topical elastase plus β-Aminopropionitrile (BAPN) mouse model by varying elastase concentration and by altering the cross-linking capability of the tissue. To do so, we assess both chronic and acute effects of elastase concentration using volumetric ultrasound. Our results suggest that the applied elastase concentration affects initial elastin degradation, as well as long-term vessel expansion. Additionally, we assessed the effects of BAPN by (1) removing it to restore the cross-linking capability of tissue after aneurysm formation and (2) adding it to animals with stable aneurysms to interrupt cross-linking. These results demonstrate that, even after aneurysm formation, lysyl oxidase inhibition remains necessary for continued expansion. Removing BAPN reduces the aneurysm growth rate to near zero, resulting in a stable aneurysm. In contrast, adding BAPN causes a stable aneurysm to expand. Altogether, these results demonstrate the ability of elastase concentration and BAPN to modulate aneurysm growth rate and severity. The findings open several new areas of investigation in a murine model that mimics many aspects of human AAA.
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Affiliation(s)
- Alycia G Berman
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, West Lafayette, IN, 47907, USA
| | - Daniel J Romary
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, West Lafayette, IN, 47907, USA
| | - Katherine E Kerr
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, West Lafayette, IN, 47907, USA
| | - Natalyn E Gorazd
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, West Lafayette, IN, 47907, USA
| | - Morgan M Wigand
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, West Lafayette, IN, 47907, USA
| | - Sourav S Patnaik
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX, USA
| | - Ender A Finol
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX, USA
| | - Abigail D Cox
- Department of Comparative Pathobiology, Purdue University, West Lafayette, IN, USA
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, West Lafayette, IN, 47907, USA.
- Purdue Center for Cancer Research, Purdue University, West Lafayette, IN, USA.
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28
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Seelbinder B, Ghosh S, Schneider SE, Scott AK, Berman AG, Goergen CJ, Margulies KB, Bedi K, Casas E, Swearingen AR, Brumbaugh J, Calve S, Neu CP. Nuclear deformation guides chromatin reorganization in cardiac development and disease. Nat Biomed Eng 2021; 5:1500-1516. [PMID: 34857921 PMCID: PMC9300284 DOI: 10.1038/s41551-021-00823-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 10/20/2021] [Indexed: 01/31/2023]
Abstract
In cardiovascular tissues, changes in the mechanical properties of the extracellular matrix are associated with cellular de-differentiation and with subsequent functional declines. However, the underlying mechanoreceptive mechanisms are largely unclear. Here, by generating high-resolution, full-field strain maps of cardiomyocyte nuclei during contraction in vitro, complemented with evidence from tissues from patients with cardiomyopathy and from mice with reduced cardiac performance, we show that cardiomyocytes establish a distinct nuclear organization during maturation, characterized by the reorganization of H3K9me3-marked chromatin towards the nuclear border. Specifically, we show that intranuclear tension is spatially correlated with H3K9me3-marked chromatin, that reductions in nuclear deformation (through environmental stiffening or through the disruption of complexes of the linker of nucleoskeleton and cytoskeleton) abrogate chromatin reorganization and lead to the dissociation of H3K9me3-marked chromatin from the nuclear periphery, and that the suppression of H3K9 methylation induces chromatin reorganization and reduces the expression of cardiac developmental genes. Overall, our findings indicate that, by integrating environmental mechanical cues, the nuclei of cardiomyocytes guide and stabilize the fate of cells through the reorganization of epigenetically marked chromatin.
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Affiliation(s)
- Benjamin Seelbinder
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder (CO)
| | - Soham Ghosh
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder (CO)
| | | | - Adrienne K. Scott
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder (CO)
| | - Alycia G. Berman
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette (IN)
| | - Craig J. Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette (IN)
| | | | - Kenneth Bedi
- Cardiovascular Institute, University of Pennsylvania, Philadelphia (PA)
| | - Eduard Casas
- Department of Molecular, Cellular & Developmental Biology, University of Colorado Boulder, Boulder (CO)
| | - Alison R. Swearingen
- Department of Molecular, Cellular & Developmental Biology, University of Colorado Boulder, Boulder (CO)
| | - Justin Brumbaugh
- Department of Molecular, Cellular & Developmental Biology, University of Colorado Boulder, Boulder (CO)
| | - Sarah Calve
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder (CO),Weldon School of Biomedical Engineering, Purdue University, West Lafayette (IN)
| | - Corey P. Neu
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder (CO),Corresponding Author
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29
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Busch A, Bleichert S, Ibrahim N, Wortmann M, Eckstein HH, Brostjan C, Wagenhäuser MU, Goergen CJ, Maegdefessel L. Translating mouse models of abdominal aortic aneurysm to the translational needs of vascular surgery. JVS Vasc Sci 2021; 2:219-234. [PMID: 34778850 PMCID: PMC8577080 DOI: 10.1016/j.jvssci.2021.01.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 01/04/2021] [Indexed: 01/03/2023] Open
Abstract
Introduction Abdominal aortic aneurysm (AAA) is a condition that has considerable socioeconomic impact and an eventual rupture is associated with high mortality and morbidity. Despite decades of research, surgical repair remains the treatment of choice and no medical therapy is currently available. Animal models and, in particular, murine models, of AAA are a vital tool for experimental in vivo research. However, each of the different models has individual limitations and provide only partial mimicry of human disease. This narrative review addresses the translational potential of the available mouse models, highlighting unanswered questions from a clinical perspective. It is based on a thorough presentation of the available literature and more than a decade of personal experience, with most of the available models in experimental and translational AAA research. Results From all the models published, only the four inducible models, namely the angiotensin II model (AngII), the porcine pancreatic elastase perfusion model (PPE), the external periadventitial elastase application (ePPE), and the CaCl2 model have been widely used by different independent research groups. Although the angiotensin II model provides features of dissection and aneurysm formation, the PPE model shows reliable features of human AAA, especially beyond day 7 after induction, but remains technically challenging. The translational value of ePPE as a model and the combination with β-aminopropionitrile to induce rupture and intraluminal thrombus formation is promising, but warrants further mechanistic insights. Finally, the external CaCl2 application is known to produce inflammatory vascular wall thickening. Unmet translational research questions include the origin of AAA development, monitoring aneurysm growth, gender issues, and novel surgical therapies as well as novel nonsurgical therapies. Conclusion New imaging techniques, experimental therapeutic alternatives, and endovascular treatment options provide a plethora of research topics to strengthen the individual features of currently available mouse models, creating the possibility of shedding new light on translational research questions.
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Affiliation(s)
- Albert Busch
- Department for Vascular and Endovascular Surgery, Technical University Munich, Munich, Germany.,Deutsches Zentrum für Herz-Kreislaufforschung (DZHK), Berlin, Germany
| | - Sonja Bleichert
- Division of Vascular Surgery and Surgical Research Laboratories, Department of Surgery, Medical University of Vienna, Vienna General Hospital, Vienna, Austria
| | - Nahla Ibrahim
- Division of Vascular Surgery and Surgical Research Laboratories, Department of Surgery, Medical University of Vienna, Vienna General Hospital, Vienna, Austria
| | - Markus Wortmann
- Department of Vascular and Endovascular Surgery, Universitaetsklinik Heidelberg, Heidelberg, Germany
| | - Hans-Henning Eckstein
- Department for Vascular and Endovascular Surgery, Technical University Munich, Munich, Germany
| | - Christine Brostjan
- Division of Vascular Surgery and Surgical Research Laboratories, Department of Surgery, Medical University of Vienna, Vienna General Hospital, Vienna, Austria
| | - Markus U Wagenhäuser
- Department of Vascular and Endovascular Surgery, Heinrich-Heine-University Medical Center Düsseldorf, Düsseldorf, Germany
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Ind
| | - Lars Maegdefessel
- Department for Vascular and Endovascular Surgery, Technical University Munich, Munich, Germany.,Deutsches Zentrum für Herz-Kreislaufforschung (DZHK), Berlin, Germany
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Mao R, Tweardy M, Wegerich SW, Goergen CJ, Wodicka GR, Zhu F. Motion Artifact Reduction In Photoplethysmography For Reliable Signal Selection. Annu Int Conf IEEE Eng Med Biol Soc 2021; 2021:5625-5630. [PMID: 34892399 DOI: 10.1109/embc46164.2021.9630595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Photoplethysmography (PPG) is a non-invasive and economical technique to extract vital signs of the human body. Although it has been widely used in consumer and research grade wrist devices to track a user's physiology, the PPG signal is very sensitive to motion which can corrupt the signal's quality. Existing Motion Artifact (MA) reduction techniques have been developed and evaluated using either synthetic noisy signals or signals collected during high-intensity activities - both of which are difficult to generalize for real-life scenarios. Therefore, it is valuable to collect realistic PPG signals while performing Activities of Daily Living (ADL) to develop practical signal denoising and analysis methods. In this work, we propose an automatic pseudo clean PPG generation process for reliable PPG signal selection. For each noisy PPG segment, the corresponding pseudo clean PPG reduces the MAs and contains rich temporal details depicting cardiac features. Our experimental results show that 71% of the pseudo clean PPG collected from ADL can be considered as high quality segment where the derived MAE of heart rate and respiration rate are 1.46 BPM and 3.93 BrPM, respectively. Therefore, our proposed method can determine the reliability of the raw noisy PPG by considering quality of the corresponding pseudo clean PPG signal.
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31
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Earl CC, Damen FW, Yin M, Aasa KL, Burris SK, Goergen CJ. Strain Estimation of the Murine Right Ventricle Using High-Frequency Speckle-Tracking Ultrasound. Ultrasound Med Biol 2021; 47:3291-3300. [PMID: 34373135 PMCID: PMC8488001 DOI: 10.1016/j.ultrasmedbio.2021.07.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 06/28/2021] [Accepted: 07/03/2021] [Indexed: 05/25/2023]
Abstract
Right ventricular (RV) strain measurements from ultrasound via speckle-tracking techniques are being used more frequently as a non-invasive diagnostic tool for a variety of cardiopulmonary pathologies. However, despite the clinical utility of ultrasound RV strain measurements, quantification of RV strain in rodents remains difficult owing to unique image artifacts and non-standardized methodologies. We demonstrate here a simple approach for measuring RV strain in both mice and rats using high-frequency ultrasound and automated speckle tracking. Our results show estimated peak RV free-wall longitudinal strain values (mean ± standard error of the mean) in mice (n = 15) and rats (n = 5) of, respectively, -10.38% ± 0.4% and -4.85% ± 0.42%. We further estimated the 2-D Green-Lagrange strain within the RV free wall, with longitudinal components estimated at -5.7% ± 0.48% in mice and -2.1% ± 0.28% in rats. These methods and data may provide a foundation for future work aimed at evaluating murine RV strain levels in different disease models.
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Affiliation(s)
- Conner C Earl
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
| | - Frederick W Damen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
| | - Melissa Yin
- Fujifilm VisualSonics Inc., Toronto, Ontario, Canada
| | | | | | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA.
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32
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Weiss D, Latorre M, Rego BV, Cavinato C, Tanski BJ, Berman AG, Goergen CJ, Humphrey JD. Biomechanical consequences of compromised elastic fiber integrity and matrix cross-linking on abdominal aortic aneurysmal enlargement. Acta Biomater 2021; 134:422-434. [PMID: 34332103 DOI: 10.1016/j.actbio.2021.07.059] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/07/2021] [Accepted: 07/23/2021] [Indexed: 12/25/2022]
Abstract
Abdominal aortic aneurysms (AAAs) are characterized histopathologically by compromised elastic fiber integrity, lost smooth muscle cells or their function, and remodeled collagen. We used a recently introduced mouse model of AAAs that combines enzymatic degradation of elastic fibers and blocking of lysyl oxidase, and thus matrix cross-linking, to study progressive dilatation of the infrarenal abdominal aorta, including development of intraluminal thrombus. We quantified changes in biomaterial properties and biomechanical functionality within the aneurysmal segment as a function of time of enlargement and degree of thrombosis. Towards this end, we combined multi-modality imaging with state-of-the art biomechanical testing and histology to quantify regional heterogeneities for the first time and we used a computational model of arterial growth and remodeling to test multiple hypotheses, suggested by the data, regarding the degree of lost elastin, accumulation of glycosaminoglycans, and rates of collagen turnover. We found that standard histopathological findings can be misleading, while combining advanced experimental and computational methods revealed that glycosaminoglycan accumulation is pathologic, not adaptive, and that heightened collagen deposition is ineffective if not cross-linked. In conclusion, loss of elastic fiber integrity can be a strong initiator of aortic aneurysms, but it is the rate and effectiveness of fibrillar collagen remodeling that dictates enlargement. STATEMENT OF SIGNIFICANCE: Precise mechanisms by which abdominal aortic aneurysms enlarge remain unclear, but a recent elastase plus β-aminopropionitrile mouse model provides new insight into disease progression. As in the human condition, the aortic degeneration and adverse remodeling are highly heterogeneous in this model. Our multi-modality experiments quantify and contrast the heterogeneities in geometry and biomaterial properties, and our computational modeling shows that standard histopathology can be misleading. Neither accumulating glycosaminoglycans nor frustrated collagen synthesis slow disease progression, thus highlighting the importance of stimulating adaptive collagen remodeling to limit lesion enlargement.
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Affiliation(s)
- D Weiss
- Department of Biomedical Engineering, Yale University, New Haven, CT, USA
| | - M Latorre
- Department of Biomedical Engineering, Yale University, New Haven, CT, USA
| | - B V Rego
- Department of Biomedical Engineering, Yale University, New Haven, CT, USA
| | - C Cavinato
- Department of Biomedical Engineering, Yale University, New Haven, CT, USA
| | - B J Tanski
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - A G Berman
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - C J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - J D Humphrey
- Department of Biomedical Engineering, Yale University, New Haven, CT, USA; Vascular Biology and Therapeutics Program, Yale School of Medicine, New Haven, CT, USA.
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33
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Muskat JC, Rayz VL, Goergen CJ, Babbs CF. Hemodynamic modeling of the circle of Willis reveals unanticipated functions during cardiovascular stress. J Appl Physiol (1985) 2021; 131:1020-1034. [PMID: 34264126 DOI: 10.1152/japplphysiol.00198.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The circle of Willis (CW) allows blood to be redistributed throughout the brain during local ischemia; however, it is unlikely that the anatomic persistence of the CW across mammalian species is driven by natural selection of individuals with resistance to cerebrovascular disease typically occurring in elderly humans. To determine the effects of communicating arteries (CoAs) in the CW on cerebral pulse wave propagation and blood flow velocity, we simulated young, active adult humans undergoing different states of cardiovascular stress (i.e., fear and aerobic exercise) using discrete transmission line segments with stress-adjusted cardiac output, peripheral resistance, and arterial compliance. Phase delays between vertebrobasilar and carotid pulses allowed bidirectional shunting through CoAs: both posteroanterior shunting before the peak of the pulse waveform and anteroposterior shunting after internal carotid pressure exceeded posterior cerebral pressure. Relative to an absent CW without intact CoAs, the complete CW blunted anterior pulse waveforms, although limited to 3% and 6% reductions in peak pressure and pulse pressure, respectively. Systolic rate of change in pressure (i.e., ∂P/∂t) was reduced 15%-24% in the anterior vasculature and increased 23%-41% in the posterior vasculature. Bidirectional shunting through posterior CoAs was amplified during cardiovascular stress and increased peak velocity by 25%, diastolic-to-systolic velocity range by 44%, and blood velocity acceleration by 134% in the vertebrobasilar arteries. This effect may facilitate stress-related increases in blood flow to the cerebellum (improving motor coordination) and reticular-activating system (enhancing attention and focus) via a nitric oxide-dependent mechanism, thereby improving survival in fight-or-flight situations.NEW & NOTEWORTHY Hemodynamic modeling reveals potential evolutionary benefits of the intact circle of Willis (CW) during fear and aerobic exercise. The CW equalizes pulse waveforms due to bidirectional shunting of blood flow through communicating arteries, which boosts vertebrobasilar blood flow velocity and acceleration. These phenomena may enhance perfusion of the brainstem and cerebellum via nitric oxide-mediated vasodilation, improving performance of the reticular-activating system and motor coordination in survival situations.
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Affiliation(s)
- J C Muskat
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
| | - V L Rayz
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana.,School of Mechanical Engineering, Purdue University, West Lafayette, Indiana
| | - C J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
| | - C F Babbs
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
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Vasiukhina A, Eshraghi J, Ahmadzadegan A, Goergen CJ, Vlachos PP, Solorio L. Stable Thermally-Modulated Nanodroplet Ultrasound Contrast Agents. Nanomaterials (Basel) 2021; 11:nano11092225. [PMID: 34578541 PMCID: PMC8469504 DOI: 10.3390/nano11092225] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/22/2021] [Accepted: 08/25/2021] [Indexed: 11/16/2022]
Abstract
Liquid perfluorocarbon-based nanodroplets are stable enough to be used in extravascular imaging, but provide limited contrast enhancement due to their small size, incompressible core, and small acoustic impedance mismatch with biological fluids. Here we show a novel approach to overcoming this limitation by using a heating-cooling cycle, which we will refer to as thermal modulation (TM), to induce echogenicity of otherwise stable but poorly echogenic nanodroplets without triggering a transient phase shift. We apply thermal modulation to high-boiling point tetradecafluorohexane (TDFH) nanodroplets stabilized with a bovine serum albumin (BSA) shell. BSA-TDFH nanodroplets with an average diameter under 300 nanometers showed an 11.9 ± 5.4 mean fold increase in echogenicity on the B-mode and a 13.9 ± 6.9 increase on the nonlinear contrast (NLC) mode after thermal modulation. Once activated, the particles maintained their enhanced echogenicity (p < 0.001) for at least 13 h while retaining their nanoscale size. Our data indicate that thermally modulated nanodroplets can potentially serve as theranostic agents or sensors for various applications of contrast-enhanced ultrasound.
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Affiliation(s)
- Anastasiia Vasiukhina
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA; (A.V.); (C.J.G.)
| | - Javad Eshraghi
- School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA; (J.E.); (A.A.)
| | - Adib Ahmadzadegan
- School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA; (J.E.); (A.A.)
| | - Craig J. Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA; (A.V.); (C.J.G.)
- Center for Cancer Research, Purdue University, West Lafayette, IN 47907, USA
| | - Pavlos P. Vlachos
- School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA; (J.E.); (A.A.)
- Correspondence: (P.P.V.); (L.S.)
| | - Luis Solorio
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA; (A.V.); (C.J.G.)
- Center for Cancer Research, Purdue University, West Lafayette, IN 47907, USA
- Correspondence: (P.P.V.); (L.S.)
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35
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Kim B, Soepriatna AH, Park W, Moon H, Cox A, Zhao J, Gupta NS, Park CH, Kim K, Jeon Y, Jang H, Kim DR, Lee H, Lee KS, Goergen CJ, Lee CH. Rapid custom prototyping of soft poroelastic biosensor for simultaneous epicardial recording and imaging. Nat Commun 2021; 12:3710. [PMID: 34140475 PMCID: PMC8211747 DOI: 10.1038/s41467-021-23959-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 05/21/2021] [Indexed: 02/05/2023] Open
Abstract
The growing need for the implementation of stretchable biosensors in the body has driven rapid prototyping schemes through the direct ink writing of multidimensional functional architectures. Recent approaches employ biocompatible inks that are dispensable through an automated nozzle injection system. However, their application in medical practices remains challenged in reliable recording due to their viscoelastic nature that yields mechanical and electrical hysteresis under periodic large strains. Herein, we report sponge-like poroelastic silicone composites adaptable for high-precision direct writing of custom-designed stretchable biosensors, which are soft and insensitive to strains. Their unique structural properties yield a robust coupling to living tissues, enabling high-fidelity recording of spatiotemporal electrophysiological activity and real-time ultrasound imaging for visual feedback. In vivo evaluations of custom-fit biosensors in a murine acute myocardial infarction model demonstrate a potential clinical utility in the simultaneous intraoperative recording and imaging on the epicardium, which may guide definitive surgical treatments.
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Affiliation(s)
- Bongjoong Kim
- School of Mechanical Engineering, Purdue University, West Lafayette, IN, USA
| | - Arvin H Soepriatna
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Woohyun Park
- School of Mechanical Engineering, Purdue University, West Lafayette, IN, USA
| | - Haesoo Moon
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Abigail Cox
- Department of Comparative Pathobiology, Purdue College of Veterinary Medicine, West Lafayette, IN, USA
| | - Jianchao Zhao
- Chemical Diagnostics and Engineering, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - Nevin S Gupta
- Chemical Diagnostics and Engineering, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - Chi Hoon Park
- Chemical Diagnostics and Engineering, Los Alamos National Laboratory, Los Alamos, NM, USA
- Department of Energy Engineering, Gyeongnam National University of Science and Technology, Jinju-Si, Republic of Korea
| | - Kyunghun Kim
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Yale Jeon
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
- School of Mechanical Engineering, Hanyang University, Seoul, Republic of Korea
| | - Hanmin Jang
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
- School of Mechanical Engineering, Hanyang University, Seoul, Republic of Korea
| | - Dong Rip Kim
- School of Mechanical Engineering, Hanyang University, Seoul, Republic of Korea
| | - Hyowon Lee
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Kwan-Soo Lee
- Chemical Diagnostics and Engineering, Los Alamos National Laboratory, Los Alamos, NM, USA.
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA.
| | - Chi Hwan Lee
- School of Mechanical Engineering, Purdue University, West Lafayette, IN, USA.
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA.
- Department of Materials Engineering, Purdue University, West Lafayette, IN, USA.
- Birck Nanotechnology Center, Purdue University, West Lafayette, IN, USA.
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36
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Damen FW, Salvas JP, Pereyra AS, Ellis JM, Goergen CJ. Improving characterization of hypertrophy-induced murine cardiac dysfunction using four-dimensional ultrasound-derived strain mapping. Am J Physiol Heart Circ Physiol 2021; 321:H197-H207. [PMID: 34085843 DOI: 10.1152/ajpheart.00133.2021] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Mouse models of cardiac disease have become essential tools in the study of pathological mechanisms, but the small size of rodents makes it challenging to quantify heart function with noninvasive imaging. Building off recent developments in high-frequency four-dimensional ultrasound (4DUS) imaging, we have applied this technology to study cardiac dysfunction progression in a murine model of metabolic cardiomyopathy. Cardiac knockout of carnitine palmitoyltransferase 2 (Cpt2M-/-) in mice hinders cardiomyocyte bioenergetic metabolism of long-chain fatty acids, and leads to progressive cardiac hypertrophy and heart failure. The proposed analysis provides a standardized approach to measure localized wall kinematics and simultaneously extracts metrics of global cardiac function, LV morphometry, regional circumferential strain, and regional longitudinal strain from an interpolated 4-D mesh of the endo- and epicardial boundaries. Comparison of metric changes due to aging suggests that circumferential strain at the base and longitudinal strain along the posterior wall are most sensitive to disease progression. We further introduce a novel hybrid strain index (HSI) that incorporates information from these two regions and may have greater utility to characterize disease progression relative to other extracted metrics. Potential applications to additional disease models are discussed that could further demonstrate the utility of metrics derived from 4DUS imaging and strain mapping.NEW & NOTEWORTHY High-frequency four-dimensional ultrasound can be used in conjunction with standardized analysis procedures to simultaneously extract left-ventricular global function, morphometry, and regional strain metrics. Furthermore, a novel hybrid strain index (HSI) formula demonstrates greater performance compared with all other metrics in characterizing disease progression in a model of metabolic cardiomyopathy.
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Affiliation(s)
- Frederick W Damen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
| | - John P Salvas
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
| | - Andrea S Pereyra
- Department of Physiology, East Carolina Diabetes and Obesity Institute, Brody School of Medicine, East Carolina University, Greenville, North Carolina
| | - Jessica M Ellis
- Department of Physiology, East Carolina Diabetes and Obesity Institute, Brody School of Medicine, East Carolina University, Greenville, North Carolina
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
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Hansen SM, Schepers LE, Pratihar R, Tibbett J, Vallejo G, Grubbs G, Fisher T, Hansen PE, Goergen CJ. Hemodynamic Assay of Hind Limb in Multiple Animal Models. Mil Med 2021; 186:351-357. [PMID: 33499513 DOI: 10.1093/milmed/usaa446] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 08/05/2020] [Accepted: 10/19/2020] [Indexed: 11/14/2022] Open
Abstract
INTRODUCTION Measuring hemodynamic characteristics of injured limbs is paramount to early identification of potentially damaging ischemic conditions, but can often prove difficult attributable to a multitude of factors. Here, we present an in vivo optical imaging technique to characterize pulsatile blood flow quality through the distal extremity in multiple animal models that replicate the signs of distal extremity ischemia. The purpose of this study is to examine the feasibility of the optical imaging technique and relevance to hemodynamic complications such as acute compartment syndrome (ACS) and nonobvious hemorrhage. MATERIALS AND METHODS In one pig and six mice, three different methods were used to create ischemic conditions in the lower extremity, producing symptoms similar to what is observed in ACS. In each condition, perfusion to the distal extremity was measured with the hemodynamic detection device (HDD; Odin Technologies), an optical assessment tool for perfusion and blood flow quality. RESULTS We observed a profound decrease in extremity perfusion immediately after onset of ischemia in all three models. In the porcine model, the HDD's measurements demonstrated similar characteristic flow between the various measurement locations. After the tourniquet was applied, the HDD revealed a 95% decrease in normalized perfusion value (npv) while the intracompartmental pressure rose from 5 to 52 mmHg (a 47mmHg increase). After the tourniquet was removed during reperfusion, the normalized blood flow returned to baseline and the intracompartmental pressure dropped from 20 to 6 mmHg in less than 5 minutes. For each mouse, the HDD test leg demonstrated a measurement of 0.97 npv before femoral ligation and 0.05 npv after femoral ligation, an 89% decrease (P < .01) in flow. Pulsed-wave Doppler ultrasound (PWDU) measurements on the test leg had pre-ligation measurement of 0.84 npv and a post-ligation measurement of 0.001 npv, a 99% decrease. These PWDU measurements revealed almost complete stoppage of blood flow during ischemia, followed by a substantial increase after the femoral artery ligation was removed. CONCLUSIONS Here, we show that a novel, optics-based sensing system can be used to diagnose and assess ACS in animal models. This technology is comparable to other standards used to monitor ACS and nonobvious hemorrhage and may also be a plausible alternative to prolonged invasive monitoring of patients with sustained extremity trauma.
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Affiliation(s)
| | - Luke E Schepers
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | | | | | | | | | | | | | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
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Pereyra AS, Harris KL, Soepriatna AH, Waterbury QA, Bharathi SS, Zhang Y, Fisher-Wellman KH, Goergen CJ, Goetzman ES, Ellis JM. Octanoate is differentially metabolized in liver and muscle and fails to rescue cardiomyopathy in CPT2 deficiency. J Lipid Res 2021; 62:100069. [PMID: 33757734 PMCID: PMC8082564 DOI: 10.1016/j.jlr.2021.100069] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/19/2021] [Accepted: 02/20/2021] [Indexed: 12/30/2022] Open
Abstract
Long-chain fatty acid oxidation is frequently impaired in primary and systemic metabolic diseases affecting the heart; thus, therapeutically increasing reliance on normally minor energetic substrates, such as ketones and medium-chain fatty acids, could benefit cardiac health. However, the molecular fundamentals of this therapy are not fully known. Here, we explored the ability of octanoate, an eight-carbon medium-chain fatty acid known as an unregulated mitochondrial energetic substrate, to ameliorate cardiac hypertrophy in long-chain fatty acid oxidation-deficient hearts because of carnitine palmitoyltransferase 2 deletion (Cpt2M-/-). CPT2 converts acylcarnitines to acyl-CoAs in the mitochondrial matrix for oxidative bioenergetic metabolism. In Cpt2M-/- mice, high octanoate-ketogenic diet failed to alleviate myocardial hypertrophy, dysfunction, and acylcarnitine accumulation suggesting that this alternative substrate is not sufficiently compensatory for energy provision. Aligning this outcome, we identified a major metabolic distinction between muscles and liver, wherein heart and skeletal muscle mitochondria were unable to oxidize free octanoate, but liver was able to oxidize free octanoate. Liver mitochondria, but not heart or muscle, highly expressed medium-chain acyl-CoA synthetases, potentially enabling octanoate activation for oxidation and circumventing acylcarnitine shuttling. Conversely, octanoylcarnitine was oxidized by liver, skeletal muscle, and heart, with rates in heart 4-fold greater than liver and, in muscles, was not dependent upon CPT2. Together, these data suggest that dietary octanoate cannot rescue CPT2-deficient cardiac disease. These data also suggest the existence of tissue-specific mechanisms for octanoate oxidative metabolism, with liver being independent of free carnitine availability, whereas cardiac and skeletal muscles depend on carnitine but not on CPT2.
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Affiliation(s)
- Andrea S Pereyra
- Brody School of Medicine at East Carolina University, Department of Physiology, and East Carolina Diabetes and Obesity Institute, Greenville, NC, USA
| | - Kate L Harris
- Department of Biochemistry, Purdue University, West Lafayette, IN, USA
| | - Arvin H Soepriatna
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Quin A Waterbury
- Department of Biochemistry, Purdue University, West Lafayette, IN, USA
| | - Sivakama S Bharathi
- Department of Pediatrics, Children's Hospital of Pittsburgh of the University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Yuxun Zhang
- Department of Pediatrics, Children's Hospital of Pittsburgh of the University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Kelsey H Fisher-Wellman
- Brody School of Medicine at East Carolina University, Department of Physiology, and East Carolina Diabetes and Obesity Institute, Greenville, NC, USA
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Eric S Goetzman
- Department of Pediatrics, Children's Hospital of Pittsburgh of the University of Pittsburgh Medical Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Jessica M Ellis
- Brody School of Medicine at East Carolina University, Department of Physiology, and East Carolina Diabetes and Obesity Institute, Greenville, NC, USA.
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Gonzalez-Gonzalez FJ, Srikanth P, Capote AE, Katherina M A, Levin B, Sridhar A, Jacob G, Martin J, Akar J, Warren CM, Solaro J, Darbar D, Goergen CJ, Wolska BM, Wehrens XH, McCauley M. Abstract P780: Myosin Light Chain Dephosphorylation by Ppp1r12c Promotes Atrial Hypocontractility in Atrial Fibrillation. Stroke 2021. [DOI: 10.1161/str.52.suppl_1.p780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Atrial fibrillation (AF) is the most common sustained arrhythmia, with an estimated prevalence in the U.S.of 6.1 million. AF increases the risk of a thromboembolic stroke in five-fold. Although atrial hypocontractility contributes to stroke risk in AF, the molecular mechanisms reducing myofilament contractile function in AF remains unknown. We have recently identified protein phosphatase 1 subunit 12c (PPP1R12C) as a key molecule targeting myosin light-chain phosphorylation in AF.
Objective:
We hypothesize that the overexpression of PPP1R12C causes hypophosphorylation of atrial myosin light-chain 2 (MLC2a), thereby decreasing atrial contractility in AF.
Methods and Results:
Left and right atrial appendage tissues were isolated from AF patients versus sinus rhythm (SR). To evaluate the role of the PP1c-PPP1R12C interaction in MLC2a de-phosphorylation, we utilized Western blots, co-immunoprecipitation, and phosphorylation assays. In patients with AF, PPP1R12C expression was increased 3.5-fold versus SR controls with an 88% reduction in MLC2a phosphorylation. PPP1R12C-PP1c binding and PPP1R12C-MLC2a binding were significantly increased in AF. In vitro studies of either pharmacologic (BDP5290) or genetic (T560A), PPP1R12C activation demonstrated increased PPP1R12C binding with both PP1c and MLC2a, and dephosphorylation of MLC2a. Additionally, to evaluate the role of PPP1R12C expression in cardiac function, mice with lentiviral cardiac-specific overexpression of PPP1R12C (Lenti-12C) were evaluated for atrial contractility using echocardiography, versus wild-type and Lenti-controls. Lenti-12C mice demonstrated a 150% increase in left atrium size versus controls, with reduced atrial strain and atrial ejection fraction. Also, programmed electrical stimulation was performed to evaluate AF inducibility in vivo. Pacing-induced AF in Lenti-12C mice was significantly higher than controls.
Conclusion:
The overexpression of PPP1R12C increases PP1c targeting to MLC2a and provokes dephosphorylation, associated with a reduction in atrial contractility and an increase in AF inducibility. All these discoveries suggest that PP1 regulation of sarcomere function at MLC2a is a main regulator of atrial contractility in AF.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Xander H Wehrens
- Cardiovascular Rsch Institute, Baylor College of Medicine, Houston, TX
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Jiang H, Woodhouse I, Selvamani V, Ma JL, Tang R, Goergen CJ, Soleimani T, Rahimi R. A Wireless Implantable Passive Intra-Abdominal Pressure Sensing Scheme via Ultrasonic Imaging of a Microfluidic Device. IEEE Trans Biomed Eng 2021; 68:747-758. [PMID: 32780694 DOI: 10.1109/tbme.2020.3015485] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In this article, we demonstrate a wireless and passive physiological pressure sensing scheme that utilizes ultrasound imaging of an implantable microfluidic based pressure sensitive transducer. The transducer consists of a sub-mm scale pressure sensitive membrane that covers a reservoir filled with water and is connected to a hydrophobic micro-channel. Applied pressure onto the transducer deflects the membrane and pushes the water from the reservoir into the channel; the water's travelling distance in the channel is a function of the applied pressure, which is quantitatively measured by using a 40 MHz ultrasound imaging system. The sensor presents a linear sensitivity of 42 kPa/mm and a spatial resolution of 1.2 kPa/30 μm in the physiological range of abdominal compartment syndrome. Reliability assessments of the transducer confirm its ability to remain functional after more than 600 cycles of pressure up to 55 kPa over the course of 2 days. Ex vivo experimental results verify the practical capability of the technology to effectively measure pressures under a 15 mm thick porcine skin. It is anticipated that this technology can be applied to a broad range of implantable pressure measurement, by simply tuning the thickness of the thin polydimethylsiloxane membrane and the geometry of the reservoir.
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Abstract
Automatic boundary detection of 4D ultrasound (4DUS) cardiac data is a promising yet challenging application at the intersection of machine learning and medicine. Using recently developed murine 4DUS cardiac imaging data, we demonstrate here a set of three machine learning models that predict left ventricular wall kinematics along both the endo- and epi-cardial boundaries. Each model is fundamentally built on three key features: (1) the projection of raw US data to a lower dimensional subspace, (2) a smoothing spline basis across time, and (3) a strategic parameterization of the left ventricular boundaries. Model 1 is constructed such that boundary predictions are based on individual short-axis images, regardless of their relative position in the ventricle. Model 2 simultaneously incorporates parallel short-axis image data into their predictions. Model 3 builds on the multi-slice approach of model 2, but assists predictions with a single ground-truth position at end-diastole. To assess the performance of each model, Monte Carlo cross validation was used to assess the performance of each model on unseen data. For predicting the radial distance of the endocardium, models 1, 2, and 3 yielded average R2 values of 0.41, 0.49, and 0.71, respectively. Monte Carlo simulations of the endocardial wall showed significantly closer predictions when using model 2 versus model 1 at a rate of 48.67%, and using model 3 versus model 2 at a rate of 83.50%. These finding suggest that a machine learning approach where multi-slice data are simultaneously used as input and predictions are aided by a single user input yields the most robust performance. Subsequently, we explore the how metrics of cardiac kinematics compare between ground-truth contours and predicted boundaries. We observed negligible deviations from ground-truth when using predicted boundaries alone, except in the case of early diastolic strain rate, providing confidence for the use of such machine learning models for rapid and reliable assessments of murine cardiac function. To our knowledge, this is the first application of machine learning to murine left ventricular 4DUS data. Future work will be needed to strengthen both model performance and applicability to different cardiac disease models.
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Affiliation(s)
- Frederick W. Damen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - David T. Newton
- Department of Statistics, Purdue University, West Lafayette, IN 47907, USA
| | - Guang Lin
- Department of Mathematics & School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Craig J. Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
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Puls TJ, Fisher CS, Cox A, Plantenga JM, McBride EL, Anderson JL, Goergen CJ, Bible M, Moller T, Voytik-Harbin SL. Regenerative tissue filler for breast conserving surgery and other soft tissue restoration and reconstruction needs. Sci Rep 2021; 11:2711. [PMID: 33526826 PMCID: PMC7851166 DOI: 10.1038/s41598-021-81771-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 01/05/2021] [Indexed: 12/25/2022] Open
Abstract
Complete removal of cancerous tissue and preservation of breast cosmesis with a single breast conserving surgery (BCS) is essential for surgeons. New and better options would allow them to more consistently achieve this goal and expand the number of women that receive this preferred therapy, while minimizing the need for re-excision and revision procedures or more aggressive surgical approaches (i.e., mastectomy). We have developed and evaluated a regenerative tissue filler that is applied as a liquid to defects during BCS prior to transitioning to a fibrillar collagen scaffold with soft tissue consistency. Using a porcine simulated BCS model, the collagen filler was shown to induce a regenerative healing response, characterized by rapid cellularization, vascularization, and progressive breast tissue neogenesis, including adipose tissue and mammary glands and ducts. Unlike conventional biomaterials, no foreign body response or inflammatory-mediated "active" biodegradation was observed. The collagen filler also did not compromise simulated surgical re-excision, radiography, or ultrasonography procedures, features that are important for clinical translation. When post-BCS radiation was applied, the collagen filler and its associated tissue response were largely similar to non-irradiated conditions; however, as expected, healing was modestly slower. This in situ scaffold-forming collagen is easy to apply, conforms to patient-specific defects, and regenerates complex soft tissues in the absence of inflammation. It has significant translational potential as the first regenerative tissue filler for BCS as well as other soft tissue restoration and reconstruction needs.
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Affiliation(s)
| | - Carla S Fisher
- Division of Surgery, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Abigail Cox
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, IN, 47907, USA
| | - Jeannie M Plantenga
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN, 47907, USA
| | - Emma L McBride
- Weldon School of Biomedical Engineering, College of Engineering, Purdue University, West Lafayette, IN, 47907, USA
- Medical Scientist/Engineer Training Program, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Jennifer L Anderson
- Weldon School of Biomedical Engineering, College of Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, College of Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Melissa Bible
- Weldon School of Biomedical Engineering, College of Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Tracy Moller
- Weldon School of Biomedical Engineering, College of Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Sherry L Voytik-Harbin
- Weldon School of Biomedical Engineering, College of Engineering, Purdue University, West Lafayette, IN, 47907, USA.
- Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN, 47907, USA.
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43
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Anderson JL, Niedert EE, Patnaik SS, Tang R, Holloway RL, Osteguin V, Finol EA, Goergen CJ. Animal Model Dependent Response to Pentagalloyl Glucose in Murine Abdominal Aortic Injury. J Clin Med 2021; 10:E219. [PMID: 33435461 PMCID: PMC7827576 DOI: 10.3390/jcm10020219] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/23/2020] [Accepted: 12/28/2020] [Indexed: 12/21/2022] Open
Abstract
Abdominal aortic aneurysms (AAAs) are a local dilation of the aorta and are associated with significant mortality due to rupture and treatment complications. There is a need for less invasive treatments to prevent aneurysm growth and rupture. In this study, we used two experimental murine models to evaluate the potential of pentagalloyl glucose (PGG), which is a polyphenolic tannin that binds to and crosslinks elastin and collagen, to preserve aortic compliance. Animals underwent surgical aortic injury and received 0.3% PGG or saline treatment on the adventitial surface of the infrarenal aorta. Seventeen mice underwent topical elastase injury, and 14 mice underwent topical calcium chloride injury. We collected high-frequency ultrasound images before surgery and at 3-4 timepoints after. There was no difference in the in vivo effective maximum diameter due to PGG treatment for either model. However, the CaCl2 model had significantly higher Green-Lagrange circumferential cyclic strain in PGG-treated animals (p < 0.05). While ex vivo pressure-inflation testing showed no difference between groups in either model, histology revealed reduced calcium deposits in the PGG treatment group with the CaCl2 model. These findings highlight the continued need for improved understanding of PGG's effects on the extracellular matrix and suggest that PGG may reduce arterial calcium accumulation.
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Affiliation(s)
- Jennifer L. Anderson
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA; (J.L.A.); (E.E.N.); (R.T.); (R.L.H.)
| | - Elizabeth E. Niedert
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA; (J.L.A.); (E.E.N.); (R.T.); (R.L.H.)
| | - Sourav S. Patnaik
- Department of Mechanical Engineering, University of Texas, San Antonio, TX 78249, USA; (S.S.P.); (V.O.); (E.A.F.)
| | - Renxiang Tang
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA; (J.L.A.); (E.E.N.); (R.T.); (R.L.H.)
| | - Riley L. Holloway
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA; (J.L.A.); (E.E.N.); (R.T.); (R.L.H.)
| | - Vangelina Osteguin
- Department of Mechanical Engineering, University of Texas, San Antonio, TX 78249, USA; (S.S.P.); (V.O.); (E.A.F.)
| | - Ender A. Finol
- Department of Mechanical Engineering, University of Texas, San Antonio, TX 78249, USA; (S.S.P.); (V.O.); (E.A.F.)
| | - Craig J. Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA; (J.L.A.); (E.E.N.); (R.T.); (R.L.H.)
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44
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Sangha GS, Goergen CJ, Prior SJ, Ranadive SM, Clyne AM. Preclinical techniques to investigate exercise training in vascular pathophysiology. Am J Physiol Heart Circ Physiol 2021; 320:H1566-H1600. [PMID: 33385323 PMCID: PMC8260379 DOI: 10.1152/ajpheart.00719.2020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Atherosclerosis is a dynamic process starting with endothelial dysfunction and inflammation and eventually leading to life-threatening arterial plaques. Exercise generally improves endothelial function in a dose-dependent manner by altering hemodynamics, specifically by increased arterial pressure, pulsatility, and shear stress. However, athletes who regularly participate in high-intensity training can develop arterial plaques, suggesting alternative mechanisms through which excessive exercise promotes vascular disease. Understanding the mechanisms that drive atherosclerosis in sedentary versus exercise states may lead to novel rehabilitative methods aimed at improving exercise compliance and physical activity. Preclinical tools, including in vitro cell assays, in vivo animal models, and in silico computational methods, broaden our capabilities to study the mechanisms through which exercise impacts atherogenesis, from molecular maladaptation to vascular remodeling. Here, we describe how preclinical research tools have and can be used to study exercise effects on atherosclerosis. We then propose how advanced bioengineering techniques can be used to address gaps in our current understanding of vascular pathophysiology, including integrating in vitro, in vivo, and in silico studies across multiple tissue systems and size scales. Improving our understanding of the antiatherogenic exercise effects will enable engaging, targeted, and individualized exercise recommendations to promote cardiovascular health rather than treating cardiovascular disease that results from a sedentary lifestyle.
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Affiliation(s)
- Gurneet S Sangha
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana.,Purdue University Center for Cancer Research, Purdue University, West Lafayette, Indiana
| | - Steven J Prior
- Department of Kinesiology, University of Maryland School of Public Health, College Park, Maryland.,Baltimore Veterans Affairs Geriatric Research, Education, and Clinical Center, Baltimore, Maryland
| | - Sushant M Ranadive
- Department of Kinesiology, University of Maryland School of Public Health, College Park, Maryland
| | - Alisa M Clyne
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
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Zbinden JC, Blum KM, Berman AG, Ramachandra AB, Szafron JM, Kerr KE, Anderson JL, Sangha GS, Earl CC, Nigh NR, Mirhaidari GJM, Reinhardt JW, Chang Y, Yi T, Smalley R, Gabriele PD, Harris JJ, Humphrey JD, Goergen CJ, Breuer CK. Tissue‐Engineered Vascular Grafts: Effects of Braiding Parameters on Tissue Engineered Vascular Graft Development (Adv. Healthcare Mater. 24/2020). Adv Healthc Mater 2020. [DOI: 10.1002/adhm.202070086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Meyers BA, Goergen CJ, Segers P, Vlachos PP. Colour-Doppler echocardiography flow field velocity reconstruction using a streamfunction-vorticity formulation. J R Soc Interface 2020; 17:20200741. [PMID: 33259749 DOI: 10.1098/rsif.2020.0741] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
We introduce a new method (Doppler Velocity Reconstruction or DoVeR), for reconstructing two-component velocity fields from colour Doppler scans. DoVeR employs the streamfunction-vorticity equation, which satisfies mass conservation while accurately approximating the flow rate of rotation. We validated DoVeR using artificial colour Doppler images generated from computational fluid dynamics models of left ventricle (LV) flow. We compare DoVeR against the conventional intraventricular vector flow mapping (iVFM1D) and reformulated iVFM (iVFM2D). LV model error analysis showed that DoVeR is more robust to noise and probe placement, with noise RMS errors (nRMSE) between 3.81% and 6.67%, while the iVFM methods delivered 4.16-24.17% for iVFM1D and 4.06-400.21% for iVFM2D. We test the DoVeR and iVFM methods using in vivo mouse LV ultrasound scans. DoVeR yielded more haemodynamically accurate reconstructions, suggesting that it can provide a more reliable approach for robust quantification of cardiac flow.
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Affiliation(s)
- Brett A Meyers
- School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907, USA
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Dr., West Lafayette, IN 47907, USA
| | - Patrick Segers
- bioMMeda Research Group, Institute Biomedical Technology (IBiTech), Ghent University, Ghent, Belgium
| | - Pavlos P Vlachos
- School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907, USA.,Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Dr., West Lafayette, IN 47907, USA
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47
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Zbinden JC, Blum KM, Berman AG, Ramachandra AB, Szafron JM, Kerr KE, Anderson JL, Sangha GS, Earl CC, Nigh NR, Mirhaidari GJM, Reinhardt JW, Chang Y, Yi T, Smalley R, Gabriele PD, Harris JJ, Humphrey JD, Goergen CJ, Breuer CK. Effects of Braiding Parameters on Tissue Engineered Vascular Graft Development. Adv Healthc Mater 2020; 9:e2001093. [PMID: 33063452 DOI: 10.1002/adhm.202001093] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 09/17/2020] [Indexed: 01/06/2023]
Abstract
Tissue engineered vascular grafts (TEVGs) using scaffolds fabricated from braided poly(glycolic acid) (PGA) fibers coated with poly(glycerol sebacate) (PGS) are developed. The approach relies on in vivo tissue engineering by which neotissue forms solely within the body after a scaffold has been implanted. Herein, the impact of altering scaffold braid design and scaffold coating on neotissue formation is investigated. Several combinations of braiding parameters are manufactured and evaluated in a Beige mouse model in the infrarenal abdominal aorta. Animals are followed with 4D ultrasound analysis, and 12 week explanted vessels are evaluated for biaxial mechanical properties as well as histological composition. Results show that scaffold parameters (i.e., braiding angle, braiding density, and presence of a PGS coating) have interdependent effects on the resulting graft performance, namely, alteration of these parameters influences levels of inflammation, extracellular matrix production, graft dilation, neovessel distensibility, and overall survival. Coupling carefully designed in vivo experimentation with regression analysis, critical relationships between the scaffold design and the resulting neotissue that enable induction of favorable cellular and extracellular composition in a controlled manner are uncovered. Such an approach provides a potential for fabricating scaffolds with a broad range of features and the potential to manufacture optimized TEVGs.
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Affiliation(s)
- Jacob C. Zbinden
- Nationwide Children's Hospital, Abagail Wexner Research Institute 575 Children's Crossroad Columbus OH 43215 USA
| | - Kevin M. Blum
- Nationwide Children's Hospital, Abagail Wexner Research Institute 575 Children's Crossroad Columbus OH 43215 USA
| | - Alycia G. Berman
- Weldon School of Biomedical Engineering, Purdue University 206 S Martin Jischke Drive West Lafayette IN 47907 USA
| | - Abhay B. Ramachandra
- Department of Biomedical Engineering, Yale University 55 Prospect Street New Haven CT 06520 USA
| | - Jason M. Szafron
- Department of Biomedical Engineering, Yale University 55 Prospect Street New Haven CT 06520 USA
| | - Katherine E. Kerr
- Weldon School of Biomedical Engineering, Purdue University 206 S Martin Jischke Drive West Lafayette IN 47907 USA
| | - Jennifer L. Anderson
- Weldon School of Biomedical Engineering, Purdue University 206 S Martin Jischke Drive West Lafayette IN 47907 USA
| | - Gurneet S. Sangha
- Weldon School of Biomedical Engineering, Purdue University 206 S Martin Jischke Drive West Lafayette IN 47907 USA
| | - Conner C. Earl
- Weldon School of Biomedical Engineering, Purdue University 206 S Martin Jischke Drive West Lafayette IN 47907 USA
| | - Noah R. Nigh
- Weldon School of Biomedical Engineering, Purdue University 206 S Martin Jischke Drive West Lafayette IN 47907 USA
| | - Gabriel J. M. Mirhaidari
- Nationwide Children's Hospital, Abagail Wexner Research Institute 575 Children's Crossroad Columbus OH 43215 USA
| | - James W. Reinhardt
- Nationwide Children's Hospital, Abagail Wexner Research Institute 575 Children's Crossroad Columbus OH 43215 USA
| | - Yu‐Chun Chang
- Nationwide Children's Hospital, Abagail Wexner Research Institute 575 Children's Crossroad Columbus OH 43215 USA
| | - Tai Yi
- Nationwide Children's Hospital, Abagail Wexner Research Institute 575 Children's Crossroad Columbus OH 43215 USA
| | - Ryan Smalley
- Secant Group, LLC 551 East Church Ave Telford PA 18969 USA
| | | | | | - Jay D. Humphrey
- Department of Biomedical Engineering, Yale University 55 Prospect Street New Haven CT 06520 USA
| | - Craig J. Goergen
- Weldon School of Biomedical Engineering, Purdue University 206 S Martin Jischke Drive West Lafayette IN 47907 USA
| | - Christopher K. Breuer
- Nationwide Children's Hospital, Abagail Wexner Research Institute 575 Children's Crossroad Columbus OH 43215 USA
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Kim K, Ro B, Damen FW, Gramling DP, Lehr TD, Song Q, Goergen CJ, Roseguini BT. Heat therapy improves body composition and muscle function but does not affect capillary or collateral growth in a model of obesity and hindlimb ischemia. J Appl Physiol (1985) 2020; 130:355-368. [PMID: 33180645 DOI: 10.1152/japplphysiol.00535.2020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Heat therapy (HT) has emerged as a potential adjunctive therapy to alleviate the symptoms of peripheral artery disease (PAD), but the mechanisms underlying the positive effects of this treatment modality remain undefined. Using a model of diet-induced obesity (DIO) and ischemia-induced muscle damage, we tested the hypothesis that HT would alter body composition, promote vascular growth and mitochondrial biogenesis, and improve skeletal muscle function. Male DIO C57Bl/6J mice underwent bilateral ligation of the femoral artery and were randomly allocated to receive HT or a control intervention for 30 min daily over 3 wk. When compared with a group of lean, sham-operated animals, ligated DIO mice exhibited increases in body and fat masses, exercise intolerance, and contractile dysfunction of the isolated soleus (SOL) and extensor digitorum longus (EDL) muscles. Repeated HT averted an increase in body mass induced by high-fat feeding due to reduced fat accrual. Fat mass was ∼25% and 29% lower in the HT group relative to controls after 2 and 3 wk of treatment, respectively. Muscle mass relative to body mass and maximal absolute force of the EDL, but not SOL, were higher in animals exposed to HT. There were no group differences in skeletal muscle capillarization, the expression of angiogenic factors, mitochondrial content, and the diameter of the gracilis arteries. These findings indicate that HT reduces diet-induced fat accumulation and rescues skeletal muscle contractile dysfunction. This practical treatment may prove useful for diabetic and obese PAD patients who are unable to undergo conventional exercise regimens.NEW & NOTEWORTHY The epidemic of obesity-related dyslipidemia and diabetes is a central cause of the increasing burden of peripheral artery disease (PAD), but few accessible therapies exist to mitigate the metabolic and functional abnormalities in these patients. We report that daily exposure to heat therapy (HT) in the form of lower-body immersion in water heated to 39 °C for 3 weeks attenuates fat accumulation and weight gain, and improves muscle strength in obese mice with femoral artery occlusion.
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Affiliation(s)
- Kyoungrae Kim
- Department of Health and Kinesiology, Purdue University, West Lafayette, Indiana
| | - Bohyun Ro
- Department of Health and Kinesiology, Purdue University, West Lafayette, Indiana
| | - Frederick W Damen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
| | - Daniel P Gramling
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
| | - Trevor D Lehr
- Department of Health and Kinesiology, Purdue University, West Lafayette, Indiana
| | - Qifan Song
- Department of Statistics, Purdue University, West Lafayette, Indiana
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
| | - Bruno T Roseguini
- Department of Health and Kinesiology, Purdue University, West Lafayette, Indiana
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49
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Boster KAS, Dong M, Oakes JM, Bellini C, Rayz VL, LaDisa JF, Parker D, Wilson NM, Shadden SC, Marsden AL, Goergen CJ. Integrated Image-Based Computational Fluid Dynamics Modeling Software as an Instructional Tool. J Biomech Eng 2020; 142:1084469. [PMID: 32529203 DOI: 10.1115/1.4047479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Indexed: 11/08/2022]
Abstract
Computational modeling of cardiovascular flows is becoming increasingly important in a range of biomedical applications, and understanding the fundamentals of computational modeling is important for engineering students. In addition to their purpose as research tools, integrated image-based computational fluid dynamics (CFD) platforms can be used to teach the fundamental principles involved in computational modeling and generate interest in studying cardiovascular disease. We report the results of a study performed at five institutions designed to investigate the effectiveness of an integrated modeling platform as an instructional tool and describe "best practices" for using an integrated modeling platform in the classroom. Use of an integrated modeling platform as an instructional tool in nontraditional educational settings (workshops, study abroad programs, in outreach) is also discussed. Results of the study show statistically significant improvements in understanding after using the integrated modeling platform, suggesting such platforms can be effective tools for teaching fundamental cardiovascular computational modeling principles.
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Affiliation(s)
- Kimberly A Stevens Boster
- School of Mechanical and Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907
| | - Melody Dong
- Bioengineering, Stanford University, Stanford, CA 94305
| | | | - Chiara Bellini
- Bioengineering, Northeastern University, Boston, MA 02115
| | - Vitaliy L Rayz
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907
| | - John F LaDisa
- Biomedical Engineering, Marquette University and the Medical College of Wisconsin, Milwaukee, WI 53233
| | - Dave Parker
- Research Computing Center, Stanford University, Stanford, CA 94305
| | - Nathan M Wilson
- Open Source Medical Software Corporation, Santa Monica, CA 90403
| | - Shawn C Shadden
- Mechanical Engineering, University of California, Berkeley, CA 94720
| | - Alison L Marsden
- Pediatrics and Bioengineering, Stanford University, Stanford, CA 94305
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907
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50
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Leyba KA, Vasudevan S, O'Sullivan TD, Goergen CJ. Evaluation of Hemodynamics in a Murine Hindlimb Ischemia Model Using Spatial Frequency Domain Imaging. Lasers Surg Med 2020; 53:557-566. [PMID: 32956499 PMCID: PMC7981275 DOI: 10.1002/lsm.23320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 08/09/2020] [Accepted: 08/30/2020] [Indexed: 01/13/2023]
Abstract
BACKGROUND AND OBJECTIVES Spatial frequency domain imaging (SFDI), an optical imaging technique capable of quantitatively measuring tissue hemodynamics over a large field-of-view, has captured the interest of scientists and clinicians due to its ability to image rapidly and noninvasively. The goal of this study was to apply SFDI in a preclinical murine model to assess its ability to measure hemodynamic changes due to hindlimb ischemia in vivo longitudinally. STUDY DESIGN/MATERIALS AND METHODS Complete unilateral femoral artery ligation was performed on a total of nine C57BL/6J mice to induce ischemia in the left hindlimb. Changes in vascular perfusion in each mouse were monitored through SFDI acquisition of both the ischemic and control limbs throughout the course of 4 weeks. High-frequency pulsed-wave Doppler ultrasound was also acquired to confirm occlusion of the left femoral artery post-ligation compared with the control limb, while histological analysis was used to quantify femoral artery lumen shape and size. RESULTS Tissue oxygen saturation in the ischemic limb normalized to the control limb decreased from a ratio of 0.96 ± 0.06 at baseline to 0.86 ± 0.10 at day 1, then 0.94 ± 0.06 at day 3, followed by 0.95 ± 0.14 at day 7, 0.91 ± 0.09 at day 14, 0.90 ± 0.09 at day 21, and 1.01 ± 0.09 at day 28. CONCLUSION The results of this study indicate the utility of SFDI to detect hemodynamic changes in a preclinical murine model, as well as how to effectively use this tool to extract information regarding ischemia-induced hindlimb changes. In our model, we observed a decline in tissue oxygen saturation within one day post-ischemic injury, followed by a return to baseline values over the 4-week study period. While reducing skin artifacts and modifying camera hardware could still improve this murine imaging approach, our multimodality study presented here suggests that SFDI can be used to reliably characterize ischemia-mediated changes in a clinically relevant mouse model of peripheral arterial disease. Lasers Surg. Med. © 2020 Wiley Periodicals LLC.
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Affiliation(s)
- Katherine A Leyba
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
| | - Sandhya Vasudevan
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana
| | - Thomas D O'Sullivan
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana
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