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Li X, Young ER, Martin C, Ribaudo JG, Zaghloul M, Roberts S, Meade R, Arif B, Moritz WR, Madira S, Schofield JB, Xun H, Hicks CW, Kang SH, Zayed MA, Sacks JM. Vaso-Lock for sutureless anastomosis in a pig arteriovenous loop model. Biomaterials 2024; 308:122563. [PMID: 38574456 DOI: 10.1016/j.biomaterials.2024.122563] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/29/2024] [Accepted: 03/31/2024] [Indexed: 04/06/2024]
Abstract
A vascular anastomosis is a critical surgical skill that involves connecting blood vessels. Traditional handsewn techniques can be challenging and resource intensive. To address these issues, we have developed a unique sutureless anastomotic device called Vaso-Lock. This intraluminal device connects free vascular ends using anchors to maintain traction and enable a rapid anastomosis. We tested the anastomotic capability of Vaso-Locks in a pig common carotid-internal jugular arteriovenous model. The use of Vaso-Lock allowed us to accomplish this procedure in less than 10 min, in contrast to the approximately 40 min required for a handsewn anastomosis. The Vaso-Lock effectively maintained patency for at least 6 weeks without causing significant tissue damage. Histological analysis revealed that the device was successfully incorporated into the arterial wall, promoting a natural healing process. Additionally, organ evaluations indicated no adverse effects from using the Vaso-Lock. Our findings support the safety and effectiveness of the Vaso-Lock for arteriovenous anastomosis in pigs, with potential applicability for translation to humans. Our novel sutureless device has the potential to advance surgical practice and improve patient outcomes.
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Affiliation(s)
- Xiaowei Li
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA.
| | - Emma R Young
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Cameron Martin
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Joseph G Ribaudo
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Mohamed Zaghloul
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Sophia Roberts
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Rodrigo Meade
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Batool Arif
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - William R Moritz
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Sarah Madira
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Jonathon B Schofield
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Helen Xun
- Department of Plastic Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Caitlin W Hicks
- Division of Vascular Surgery and Endovascular Therapy, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Sung H Kang
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Mohamed A Zayed
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA; Division of Molecular Cell Biology, Washington University School of Medicine, St. Louis, MO, 63110, USA; Department of Biomedical Engineering, McKelvey School of Engineering, Washington University in St. Louis, MO, 63130, USA; St. Louis Veterans Affairs Health Care System, St. Louis, MO, 63106, USA.
| | - Justin M Sacks
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA.
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Young ER, Martin C, Ribaudo J, Xia X, Moritz WR, Madira S, Zayed MA, Sacks JM, Li X. Surface Modification of PEEKs with Cyclic Peptides to Support Endothelialization and Antithrombogenicity. Mater Today Commun 2024; 39:108664. [PMID: 38618226 PMCID: PMC11008579 DOI: 10.1016/j.mtcomm.2024.108664] [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: 04/16/2024]
Abstract
Synthetic polymers are often utilized in the creation of vascular devices, and need to possess specific qualities to prevent thrombosis. Traditional strategies for this include surface modification of vascular devices through covalent attachment of substrates such as heparin, antiplatelet agents, thrombolytic agents, or hydrophilic polymers. One promising prosthetic material is polyether ether ketone (PEEK), which is utilized in various FDA-approved medical devices, including vascular and endovascular prostheses. We hypothesized that surface modification of biologically inert PEEK can help improve its endothelial cell affinity and reduce its thrombogenic potential. To evaluate this, we developed an effective surface-modification approach with unique cyclic peptides, such as CCHGGVRLYC and CCREDVC. We treated the PEEK surface with ammonia plasma, which introduced amine groups onto the PEEK surface. Subsequently, we were able to conjugate these peptides to the plasma-modified PEEKs. We observed that cyclic CCHGGVRLYC conjugated on prosthetic PEEK not only supported endothelialization, but minimized platelet adhesion and activation. This technology can be potentially applied for in vivo vascular and endovascular protheses to enhance their utility and patency.
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Affiliation(s)
- Emma R. Young
- Division of Plastic and Reconstructive Surgery, Washington University School of Medicine
| | - Cameron Martin
- Division of Plastic and Reconstructive Surgery, Washington University School of Medicine
| | - Joseph Ribaudo
- Division of Plastic and Reconstructive Surgery, Washington University School of Medicine
| | - Xiaochao Xia
- Division of Plastic and Reconstructive Surgery, Washington University School of Medicine
| | - William R. Moritz
- Division of Plastic and Reconstructive Surgery, Washington University School of Medicine
| | - Sarah Madira
- Division of Plastic and Reconstructive Surgery, Washington University School of Medicine
| | - Mohamed A. Zayed
- Section of Vascular Surgery, Washington University School of Medicine
- Division of Molecular Cell Biology, Washington University School of Medicine
- Department of Biomedical Engineering, McKelvey School of Engineering, Washington University in St. Louis
- St. Louis Veterans Affairs Health Care System, St. Louis, MO
| | - Justin M. Sacks
- Division of Plastic and Reconstructive Surgery, Washington University School of Medicine
| | - Xiaowei Li
- Division of Plastic and Reconstructive Surgery, Washington University School of Medicine
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Roberts SH, Zaghloul MS, Ismail U, Rowe RA, Engel C, Meade R, Elizondo-Benedetto S, Genin GM, Zayed MA. In Vivo Porcine Model of Acute Iliocaval Deep Vein Thrombosis. J Endovasc Ther 2024:15266028241231513. [PMID: 38357736 DOI: 10.1177/15266028241231513] [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] [Indexed: 02/16/2024]
Abstract
CLINICAL IMPACT The study establishes a rapid, technically straightforward, and reproducible porcine large animal model for acute iliocaval deep vein thrombosis (DVT). The procedure can be performed with basic endovascular skillsets. With its procedural efficiency and consistency, the platform is promising for comparative in vivo testing of venous thrombectomy devices in a living host, and for future verification and validation studies to determine efficacy of novel thrombectomy devices relative to predicates.
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Affiliation(s)
- Sophia H Roberts
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Cardiovascular Research Innovation in Surgery and Engineering Center, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
| | - Mohamed S Zaghloul
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Cardiovascular Research Innovation in Surgery and Engineering Center, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
| | | | | | - Connor Engel
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Cardiovascular Research Innovation in Surgery and Engineering Center, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
| | - Rodrigo Meade
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Cardiovascular Research Innovation in Surgery and Engineering Center, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
| | - Santiago Elizondo-Benedetto
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Cardiovascular Research Innovation in Surgery and Engineering Center, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
| | - Guy M Genin
- Cardiovascular Research Innovation in Surgery and Engineering Center, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Caeli Vascular, Inc., St. Louis, MO, USA
- Department of Biomedical Engineering, McKelvey School of Engineering, Washington University in St. Louis, St. Louis, MO, USA
- NSF Science and Technology Center for Engineering Mechanobiology, McKelvey School of Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Mohamed A Zayed
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Cardiovascular Research Innovation in Surgery and Engineering Center, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Caeli Vascular, Inc., St. Louis, MO, USA
- Department of Biomedical Engineering, McKelvey School of Engineering, Washington University in St. Louis, St. Louis, MO, USA
- Division of Molecular Cell Biology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
- Department of Radiology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
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4
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Hosny R, Zahran A, Abotaleb A, Ramzi M, Mubarak MF, Zayed MA, Shahawy AE, Hussein MF. Correction to "Nanotechnology Impact on Chemical-Enhanced Oil Recovery: A Review and Bibliometric Analysis of Recent Developments". ACS Omega 2024; 9:5083. [PMID: 38313541 PMCID: PMC10832001 DOI: 10.1021/acsomega.3c10450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Indexed: 02/06/2024]
Abstract
[This corrects the article DOI: 10.1021/acsomega.3c06206.].
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Affiliation(s)
- Rasha Hosny
- Department
of Production, Egyptian Petroleum Research
Institute (EPRI), Ahmed El-Zomer, Cairo 11727, Egypt
| | - Ahmed Zahran
- Department
of Production, Egyptian Petroleum Research
Institute (EPRI), Ahmed El-Zomer, Cairo 11727, Egypt
| | - Ahmed Abotaleb
- Department
of Civil Engineering, Faculty of Engineering, Suez Canal University, Ismailia 41522, Egypt
| | - Mahmoud Ramzi
- Department
of Production, Egyptian Petroleum Research
Institute (EPRI), Ahmed El-Zomer, Cairo 11727, Egypt
| | - Mahmoud F. Mubarak
- Department
of Petroleum Application, Egyptian Petroleum
Research Institute (EPRI), Ahmed El-Zomer, Cairo 11727, Egypt
| | - Mohamed A. Zayed
- Chemistry
Department, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Abeer El Shahawy
- Department
of Civil Engineering, Faculty of Engineering, Suez Canal University, Ismailia 41522, Egypt
| | - Modather F. Hussein
- Chemistry
Department, College of Science, Jouf University, Sakakah 74331, Saudi Arabia
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5
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Sastriques-Dunlop S, Elizondo-Benedetto S, Arif B, Meade R, Zaghloul MS, Luehmann H, Heo GS, English SJ, Liu Y, Zayed MA. Ketosis prevents abdominal aortic aneurysm rupture through C-C chemokine receptor type 2 downregulation and enhanced extracellular matrix balance. Sci Rep 2024; 14:1438. [PMID: 38228786 PMCID: PMC10791699 DOI: 10.1038/s41598-024-51996-7] [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: 06/12/2023] [Accepted: 01/12/2024] [Indexed: 01/18/2024] Open
Abstract
Abdominal aortic aneurysms (AAAs) are prevalent with aging, and AAA rupture is associated with increased mortality. There is currently no effective medical therapy to prevent AAA rupture. The monocyte chemoattractant protein (MCP-1)/C-C chemokine receptor type 2 (CCR2) axis critically regulates AAA inflammation, matrix-metalloproteinase (MMP) production, and extracellular matrix (ECM) stability. We therefore hypothesized that a diet intervention that can modulate CCR2 axis may therapeutically impact AAA risk of rupture. Since ketone bodies (KBs) can trigger repair mechanisms in response to inflammation, we evaluated whether systemic ketosis in vivo could reduce CCR2 and AAA progression. Male Sprague-Dawley rats underwent surgical AAA formation using porcine pancreatic elastase and received daily β-aminopropionitrile to promote AAA rupture. Rats with AAAs received either a standard diet, ketogenic diet (KD), or exogenous KBs (EKB). Rats receiving KD and EKB reached a state of ketosis and had significant reduction in AAA expansion and incidence of rupture. Ketosis also led to significantly reduced aortic CCR2 content, improved MMP balance, and reduced ECM degradation. Consistent with these findings, we also observed that Ccr2-/- mice have significantly reduced AAA expansion and rupture. In summary, this study demonstrates that CCR2 is essential for AAA expansion, and that its modulation with ketosis can reduce AAA pathology. This provides an impetus for future clinical studies that will evaluate the impact of ketosis on human AAA disease.
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Affiliation(s)
- Sergio Sastriques-Dunlop
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Santiago Elizondo-Benedetto
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Batool Arif
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Rodrigo Meade
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Mohamed S Zaghloul
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Hannah Luehmann
- Department of Radiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Gyu S Heo
- Department of Radiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Sean J English
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Yongjian Liu
- Department of Radiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Mohamed A Zayed
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, USA.
- Department of Radiology, Washington University School of Medicine, St. Louis, MO, USA.
- Division of Molecular Cell Biology, Washington University School of Medicine, St. Louis, MO, USA.
- Department of Biomedical Engineering, McKelvey School of Engineering, Washington University, St. Louis, MO, USA.
- Veterans Affairs St. Louis Health Care System, St. Louis, MO, USA.
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6
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Abstract
OBJECTIVES A comprehensive review of the current literature was conducted to summarize the potential therapeutic and management roles of ketogenic diet (KD) for cardiovascular disease (CVD). BACKGROUND Consensus has not been reached on the optimal diet for individuals with cardiovascular risk factors. KDs are characterized by high-fat, low-carbohydrate, and appropriate protein content, and have gained popularity in recent years in the management of various conditions, including cardiovascular and metabolic diseases. METHODS Original research, systematic reviews, and meta-analyses available in the PubMed, Web of Science, and Google Scholar databases were reviewed. RESULTS The current body of preclinical and clinical evidence on the efficacy of KD in the management of CVD remains limited. Specific applications of KD seem to suggest a positive impact on management of CVD. However, conflicting results and a lack of precise molecular and biochemical mechanisms of action provide ample opportunity for future investigation. CONCLUSION More multidisciplinary studies are needed to determine the true clinical benefit of KD in the management of CVD and so justify its expanded clinical use.
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Affiliation(s)
- Mohamed S Zaghloul
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Santiago Elizondo-Benedetto
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Mohamed A Zayed
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St. Louis, MO, USA
- Department of Radiology, Washington University School of Medicine, St. Louis, MO, USA
- Division of Molecular Cell Biology, Washington University School of Medicine, St. Louis, MO, USA
- McKelvey School of Engineering, Department of Biomedical Engineering, Washington University, St. Louis, MO, USA
- Department of Surgery, Veterans Affairs St. Louis Health Care System, St. Louis, MO, USA
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7
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Qiu MY, Suskin CB, Becerra-Garcia JJ, Roberts SH, Rucker DG, Zayed MA, Osbun JW, Genin GM. Quantification of the flexural rigidity of endovascular surgical devices using three-point bending tests. Res Sq 2023:rs.3.rs-3736325. [PMID: 38168215 PMCID: PMC10760252 DOI: 10.21203/rs.3.rs-3736325/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Endovascular surgical procedures require the navigation of catheters and wires through the vasculature to reach distal target sites. Quantitative frameworks for device selection hold the potential to improve the tracking of endovascular devices through vascular anatomy by personalizing the device flexural rigidity to an individual's anatomy. However, data are lacking to facilitate this technology, in part because typical endovascular devices have intricate spatial variations in mechanical properties that are challenging and tedious to quantify repeatably. We therefore developed a three-point bend test methodology using a custom rig and applied it to measure lengthwise flexural rigidity profiles of endovascular devices that are used to target the cerebral vasculature. The methodology demonstrated high repeatability and was able to characterize transition zones. We applied the methodology to generate the first comprehensive, quantitative library of device flexural rigidities, spanning guidewires, intermediate guides, and long sheaths. We observed that these three classes of device have properties that fall into distinct ranges. Additional plots examining relationships between flexural rigidity, device diameter, and length revealed application-specific trends in flexural properties. This methodology and the data allow for standardized characterization and comparisons to aid device selection, and have the potential to both enhance surgical planning and inform future innovation.
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Affiliation(s)
- Michael Y. Qiu
- CardioVascular Research Innovation in Surgery & Engineering Center, Washington University in St. Louis, Missouri, USA
- Division of Neurotechnology, Department of Neurological Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri, USA
| | - Charles B. Suskin
- CardioVascular Research Innovation in Surgery & Engineering Center, Washington University in St. Louis, Missouri, USA
- Division of Neurotechnology, Department of Neurological Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
- Department of Mechanical Engineering and Material Sciences, Washington University in St. Louis, St. Louis, Missouri, USA
- Center for Innovation in Neuroscience and Technology, Washington University School of Medicine, St. Louis, Missouri, USA
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
- NSF Science and Technology Center for Engineering Mechanobiology, Washington University in St. Louis, St. Louis, Missouri, USA
| | - Juan J. Becerra-Garcia
- CardioVascular Research Innovation in Surgery & Engineering Center, Washington University in St. Louis, Missouri, USA
- Division of Neurotechnology, Department of Neurological Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
- Department of Mechanical Engineering and Material Sciences, Washington University in St. Louis, St. Louis, Missouri, USA
- Center for Innovation in Neuroscience and Technology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Sophia H. Roberts
- CardioVascular Research Innovation in Surgery & Engineering Center, Washington University in St. Louis, Missouri, USA
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri, USA
- Center for Innovation in Neuroscience and Technology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - DeVaughn G. Rucker
- CardioVascular Research Innovation in Surgery & Engineering Center, Washington University in St. Louis, Missouri, USA
- Division of Neurotechnology, Department of Neurological Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri, USA
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
- NSF Science and Technology Center for Engineering Mechanobiology, Washington University in St. Louis, St. Louis, Missouri, USA
| | - Mohamed A. Zayed
- CardioVascular Research Innovation in Surgery & Engineering Center, Washington University in St. Louis, Missouri, USA
- Division of Neurotechnology, Department of Neurological Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri, USA
- Center for Innovation in Neuroscience and Technology, Washington University School of Medicine, St. Louis, Missouri, USA
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Joshua W. Osbun
- CardioVascular Research Innovation in Surgery & Engineering Center, Washington University in St. Louis, Missouri, USA
- Division of Neurotechnology, Department of Neurological Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
- Center for Innovation in Neuroscience and Technology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Guy M. Genin
- CardioVascular Research Innovation in Surgery & Engineering Center, Washington University in St. Louis, Missouri, USA
- Division of Neurotechnology, Department of Neurological Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri, USA
- Department of Mechanical Engineering and Material Sciences, Washington University in St. Louis, St. Louis, Missouri, USA
- Center for Innovation in Neuroscience and Technology, Washington University School of Medicine, St. Louis, Missouri, USA
- NSF Science and Technology Center for Engineering Mechanobiology, Washington University in St. Louis, St. Louis, Missouri, USA
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8
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Hosny R, Zahran A, Abotaleb A, Ramzi M, Mubarak MF, Zayed MA, Shahawy AE, Hussein MF. Nanotechnology Impact on Chemical-Enhanced Oil Recovery: A Review and Bibliometric Analysis of Recent Developments. ACS Omega 2023; 8:46325-46345. [PMID: 38107971 PMCID: PMC10720301 DOI: 10.1021/acsomega.3c06206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 11/09/2023] [Accepted: 11/14/2023] [Indexed: 12/19/2023]
Abstract
Oil and gas are only two industries that could change because of nanotechnology, a rapidly growing field. The chemical-enhanced oil recovery (CEOR) method uses chemicals to accelerate oil flow from reservoirs. New and enhanced CEOR compounds that are more efficient and eco-friendly can be created using nanotechnology. One of the main research areas is creating novel nanomaterials that can transfer EOR chemicals to the reservoir more effectively. It was creating nanoparticles that can be used to change the viscosity and surface tension of reservoir fluids and constructing nanoparticles that can be utilized to improve the efficiency of the EOR compounds that are already in use. The assessment also identifies some difficulties that must be overcome before nanotechnology-based EOR can become widely used in industry. These difficulties include the requirement for creating mass-producible, cost-effective nanomaterials. There is a need to create strategies for supplying nanomaterials to the reservoir without endangering the formation of the reservoir. The requirement is to evaluate the environmental effects of CEOR compounds based on nanotechnology. The advantages of nanotechnology-based EOR are substantial despite the difficulties. Nanotechnology could make oil production more effective, profitable, and less environmentally harmful. An extensive overview of the most current advancements in nanotechnology-based EOR is provided in this paper. It is a useful resource for researchers and business people interested in this area. This review's analysis of current advancements in nanotechnology-based EOR shows that this area is attracting more and more attention. There have been a lot more publications on this subject in recent years, and a lot of research is being done on many facets of nanotechnology-based EOR. The scientometric investigation discovered serious inadequacies in earlier studies on adopting EOR and its potential benefits for a sustainable future. Research partnerships, joint ventures, and cutting-edge technology that consider assessing current changes and advances in oil output can all benefit from the results of our scientometric analysis.
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Affiliation(s)
- Rasha Hosny
- Department
of Production, Egyptian Petroleum Research
Institute (EPRI), Ahmed El-Zomer, Cairo 11727, Egypt
| | - Ahmed Zahran
- Department
of Production, Egyptian Petroleum Research
Institute (EPRI), Ahmed El-Zomer, Cairo 11727, Egypt
| | - Ahmed Abotaleb
- Department
of Civil Engineering, Faculty of Engineering, Suez Canal University, Ismailia 41522, Egypt
| | - Mahmoud Ramzi
- Department
of Production, Egyptian Petroleum Research
Institute (EPRI), Ahmed El-Zomer, Cairo 11727, Egypt
| | - Mahmoud F. Mubarak
- Department
of Petroleum Application, Egyptian Petroleum
Research Institute (EPRI), Ahmed El-Zomer, Cairo 11727, Egypt
| | - Mohamed A. Zayed
- Chemistry
Department, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Abeer El Shahawy
- Department
of Civil Engineering, Faculty of Engineering, Suez Canal University, Ismailia 41522, Egypt
| | - Modather F. Hussein
- Chemistry
Department, College of Science, Al-Jouf
University, Sakakah 74331, Saudi Arabia
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9
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Jeon J, Lee KZ, Zhang X, Jaeger J, Kim E, Li J, Belaygorod L, Arif B, Genin GM, Foston MB, Zayed MA, Zhang F. Genetically Engineered Protein-Based Bioadhesives with Programmable Material Properties. ACS Appl Mater Interfaces 2023. [PMID: 38039085 DOI: 10.1021/acsami.3c12919] [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] [Subscribe] [Scholar Register] [Indexed: 12/03/2023]
Abstract
Silk-amyloid-mussel foot protein (SAM) hydrogels made from recombinant fusion proteins containing β-amyloid peptide, spider silk domain, and mussel foot protein (Mfp) are attractive bioadhesives as they display a unique combination of tunability, biocompatibility, bioabsorbability, strong cohesion, and underwater adhesion to a wide range of biological surfaces. To design tunable SAM hydrogels for tailored surgical repair applications, an understanding of the relationships between protein sequence and hydrogel properties is imperative. Here, we fabricated SAM hydrogels using fusion proteins of varying lengths of silk-amyloid repeats and Mfps to characterize their structure and properties. We found that increasing silk-amyloid repeats enhanced the hydrogel's β-sheet content (r = 0.74), leading to higher cohesive strength and toughness. Additionally, increasing the Mfp length beyond the half-length of the full Mfp sequence (1/2 Mfp) decreased the β-sheet content (r = -0.47), but increased hydrogel surface adhesion. Among different variants, the hydrogel made of 16xKLV-2Mfp displayed a high ultimate strength of 3.0 ± 0.3 MPa, an ultimate strain of 664 ± 119%, and an attractive underwater adhesivity of 416 ± 20 kPa to porcine skin. Collectively, the sequence-structure-property relationships learned from this study will be useful to guide the design of future protein adhesives with tunable characteristics for tailored surgical applications.
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Affiliation(s)
- Juya Jeon
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, One Brookings Drive, Saint Louis, Missouri 63130, United States
| | - Kok Zhi Lee
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, One Brookings Drive, Saint Louis, Missouri 63130, United States
| | - Xiaolu Zhang
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, One Brookings Drive, Saint Louis, Missouri 63130, United States
| | - John Jaeger
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, One Brookings Drive, Saint Louis, Missouri 63130, United States
| | - Eugene Kim
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, One Brookings Drive, Saint Louis, Missouri 63130, United States
| | - Jingyao Li
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, One Brookings Drive, Saint Louis, Missouri 63130, United States
| | - Larisa Belaygorod
- Department of Surgery, Section of Vascular Surgery, Washington University of Medicine in St. Louis, 660 South Euclid Avenue, Saint Louis, Missouri 63110, United States
| | - Batool Arif
- Department of Surgery, Section of Vascular Surgery, Washington University of Medicine in St. Louis, 660 South Euclid Avenue, Saint Louis, Missouri 63110, United States
| | - Guy M Genin
- NSF Science and Technology Center for Engineering MechanoBiology, Department of Mechanical Engineering & Materials Science, Washington University in St. Louis, One Brookings Drive, Saint Louis, Missouri 63130, United States
- Institute of Materials Science and Engineering, Washington University in St. Louis, One Brookings Drive, Saint Louis, Missouri 63130, United States
- Division of Biological & Biomedical Sciences, Washington University in St. Louis, One Brookings Drive, Saint Louis, Missouri 63130, United States
| | - Marcus B Foston
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, One Brookings Drive, Saint Louis, Missouri 63130, United States
| | - Mohamed A Zayed
- Department of Surgery, Section of Vascular Surgery, Washington University of Medicine in St. Louis, 660 South Euclid Avenue, Saint Louis, Missouri 63110, United States
- Department of Radiology, Washington University of Medicine in St. Louis, 660 South Euclid Avenue, Saint Louis, Missouri 63110, United States
- Division of Molecular Cell Biology, Washington University of Medicine in St. Louis, 660 South Euclid Avenue, Saint Louis, Missouri 63110, United States
- Division of Molecular Cell Biology, Washington University of Medicine in St. Louis, 660 South Euclid Avenue, Saint Louis, Missouri 63110, United States
- Veterans Affairs St. Louis Health Care System, 915 North Grand Boulevard, St. Louis, Missouri 63106, United States
| | - Fuzhong Zhang
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, One Brookings Drive, Saint Louis, Missouri 63130, United States
- Institute of Materials Science and Engineering, Washington University in St. Louis, One Brookings Drive, Saint Louis, Missouri 63130, United States
- Division of Biological & Biomedical Sciences, Washington University in St. Louis, One Brookings Drive, Saint Louis, Missouri 63130, United States
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10
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Meade R, Chao Y, Harroun N, Li C, Hafezi S, Hsu FF, Semenkovich CF, Zayed MA. Ceramides in peripheral arterial plaque lead to endothelial cell dysfunction. JVS Vasc Sci 2023; 4:100181. [PMID: 38077163 PMCID: PMC10704331 DOI: 10.1016/j.jvssci.2023.100181] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 10/22/2023] [Indexed: 02/12/2024] Open
Abstract
Background Peripheral arterial atheroprogression is increasingly prevalent, and is a risk factor for major limb amputations in individuals with risk factors such as diabetes. We previously demonstrated that bioactive lipids are significantly altered in arterial tissue of individuals with diabetes and advanced peripheral arterial disease. Methods Here we evaluated whether sphingolipid ceramide 18:1/16:0 (C16) is a cellular regulator in endothelial cells and peripheral tibial arterial tissue in individuals with diabetes. Results We observed that C16 is the single most elevated ceramide in peripheral arterial tissue from below the knee in individuals with diabetes (11% increase, P < .05). C16 content in tibial arterial tissue positively correlates with sphingomyelin (SPM) content in patients with and without diabetes (r2 = 0.5, P < .005; r2 = 0.17, P < .05; respectively). Tibial arteries of individuals with diabetes demonstrated no difference in CERS6 expression (encoding ceramide synthase 6; the predominate ceramide synthesis enzyme), but higher SMPD expression (encoding sphingomyelin phosphodiesterase that catalyzes ceramide synthesis from sphingomyelins; P < .05). SMPD4, but not SMPD2, was particularly elevated in maximally diseased (Max) tibial arterial segments (P < .05). In vitro, exogenous C16 caused endothelial cells (HUVECs) to have decreased proliferation (P < .03), increased apoptosis (P < .003), and decreased autophagy (P < .008). Selective knockdown of SMPD2 and SMPD4 decreased native production of C16 (P < .01 and P < .001, respectively), but only knockdown of SMPD4 rescued cellular proliferation (P < .005) following exogenous supplementation with C16. Conclusions Our findings suggest that C16 is a tissue biomarker for peripheral arterial disease severity in the setting of diabetes, and can impact endothelial cell viability and function. Clinical relevance Peripheral arterial disease and its end-stage manifestation known as chronic limb-threatening ischemia (CLTI) represent ongoing prevalent and intricate medical challenges. Individuals with diabetes have a heightened risk of developing CLTI and experiencing its complications, including wounds, ulcers, and major amputations. In the present study, we conducted a comprehensive examination of the molecular lipid composition within arterial segments from individuals with CLTI, and with and without diabetes. Our investigations unveiled a striking revelation: the sphingolipid ceramide 18:1/16:0 emerged as the predominant ceramide species that was significantly elevated in the peripheral arterial intima below the knee in patients with diabetes. Moreover, this heightened ceramide presence is associated with a marked impairment of endothelial cell function and viability. Additionally, our study revealed a concurrent elevation in the expression of sphingomyelin phosphodiesterases, enzymes responsible for catalyzing ceramide synthesis from sphingomyelins, within maximally diseased arterial segments. These findings underscore the pivotal role of ceramides and their biosynthesis enzymes in the context of CLTI, offering new insights into potential therapeutic avenues for managing this challenging disease process.
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Affiliation(s)
- Rodrigo Meade
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO
| | - Yang Chao
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO
| | - Nikolai Harroun
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO
| | - Chenglong Li
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO
| | - Shahab Hafezi
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO
| | - Fong-Fu Hsu
- Division of Endocrinology, Lipid, and Metabolism, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO
| | - Clay F. Semenkovich
- Division of Endocrinology, Lipid, and Metabolism, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO
| | - Mohamed A. Zayed
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO
- Department of Surgery, Veterans Affairs St. Louis Health Care System, St. Louis, MO
- Department of Radiology, Washington University School of Medicine, St. Louis, MO
- Division of Molecular Cell Biology, Washington University School of Medicine, St. Louis, MO
- Department of Biomedical Engineering, Washington University, McKelvey School of Engineering, St. Louis, MO
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11
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Elizondo-Benedetto S, Sastriques-Dunlop S, Detering L, Arif B, Heo GS, Sultan D, Luehmann H, Zhang X, Gao X, Harrison K, Thies D, McDonald L, Combadière C, Lin CY, Kang Y, Zheng J, Ippolito J, Laforest R, Gropler RJ, English SJ, Zayed MA, Liu Y. Chemokine Receptor 2 Is A Theranostic Biomarker for Abdominal Aortic Aneurysms. medRxiv 2023:2023.11.06.23298031. [PMID: 37986880 PMCID: PMC10659515 DOI: 10.1101/2023.11.06.23298031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Abdominal aortic aneurysm (AAA) is a degenerative vascular disease impacting aging populations with a high mortality upon rupture. There are no effective medical therapies to prevent AAA expansion and rupture. We previously demonstrated the role of the monocyte chemoattractant protein-1 (MCP-1) / C-C chemokine receptor type 2 (CCR2) axis in rodent AAA pathogenesis via positron emission tomography/computed tomography (PET/CT) using CCR2 targeted radiotracer 64 Cu-DOTA-ECL1i. We have since translated this radiotracer into patients with AAA. CCR2 PET showed intense radiotracer uptake along the AAA wall in patients while little signal was observed in healthy volunteers. AAA tissues collected from individuals scanned with 64 Cu-DOTA-ECL1i and underwent open-repair later demonstrated more abundant CCR2+ cells compared to non-diseased aortas. We then used a CCR2 inhibitor (CCR2i) as targeted therapy in our established male and female rat AAA rupture models. We observed that CCR2i completely prevented AAA rupture in male rats and significantly decreased rupture rate in female AAA rats. PET/CT revealed substantial reduction of 64 Cu-DOTA-ECL1i uptake following CCR2i treatment in both rat models. Characterization of AAA tissues demonstrated decreased expression of CCR2+ cells and improved histopathological features. Taken together, our results indicate the potential of CCR2 as a theranostic biomarker for AAA management.
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12
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Wahidi R, Zhang Y, Li R, Xu J, Zayed MA, Hastings MK, Zheng J. Quantitative Assessment of Peripheral Oxidative Metabolism With a New Dynamic 1 H MRI Technique: A Pilot Study in People With and Without Diabetes Mellitus. J Magn Reson Imaging 2023. [PMID: 37695103 PMCID: PMC10925551 DOI: 10.1002/jmri.28996] [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: 01/31/2023] [Revised: 08/19/2023] [Accepted: 08/23/2023] [Indexed: 09/12/2023] Open
Abstract
BACKGROUND Type 2 diabetes mellitus (T2DM) is linked to impaired mitochondrial function. Chemical exchange saturation transfer (CEST) magnetic resonance imaging (MRI) is a gadolinium-contrast-free 1 H method to assess mitochondrial function by measuring low-concentration metabolites. A CEST MRI-based technique may serve as a non-invasive proxy for assessing mitochondrial health. HYPOTHESIS A 1 H CEST MRI technique may detect significant differences in in vivo skeletal muscle phosphocreatine (SMPCr) kinetics between healthy volunteers and T2DM patients undergoing standardized isometric exercise. STUDY TYPE Cross-sectional study. SUBJECTS Seven subjects without T2DM (T2DM-) and seven age, sex, and BMI-matched subjects with T2DM (T2DM+). FIELD STRENGTH/SEQUENCE Single-shot rapid acquisition with refocusing echoes (RARE) and single-shot gradient-echo sequences, 3 T. ASSESSMENT Subjects underwent a rest-exercise-recovery imaging protocol to dynamically acquire SMPCr maps in calf musculature. Medial gastrocnemius (MG) and soleus SMPCr concentrations were plotted over time, and SMPCr recovery time,τ $$ \tau $$ , was determined. Mitochondrial function index was calculated as the ratio of resting SMPCr toτ $$ \tau $$ . Participants underwent a second exercise protocol for imaging of skeletal muscle blood flow (SMBF), and its association with SMPCr was assessed. STATISTICAL TESTS Unpaired t-tests and Pearson correlation coefficient. A P value <0.05 was considered statistically significant. RESULTS SMPCr concentrations in MG and soleus displayed expected declines during exercise and returns to baseline during recovery.τ $$ \tau $$ was significantly longer in the T2DM+ cohort (MG 83.5 ± 25.8 vs. 54.0 ± 21.1, soleus 90.5 ± 18.9 vs. 51.2 ± 14.5). The mitochondrial function index in the soleus was significantly lower in the T2DM+ cohort (0.33 ± 0.08 vs. 0.66 ± 0.19). SMBF was moderately correlated with the SMPCr in T2DM-; this correlation was not significant in T2DM+ (r = -0.23, P = 0.269). CONCLUSION The CEST MRI method is feasible for quantifying SMPCr in peripheral muscle tissue. T2DM+ individuals had significantly lower oxidative capacities than T2DM- individuals. In T2DM, skeletal muscle metabolism appeared to be decoupled from perfusion. LEVEL OF EVIDENCE 1 TECHNICAL EFFICACY: Stage 1.
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Affiliation(s)
- Ryan Wahidi
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Yi Zhang
- Key Laboratory for Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou, China
| | - Ran Li
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Jiadi Xu
- Department of Radiology, John Hopkins University, Baltimore, Maryland, USA
| | - Mohamed A Zayed
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Mary K Hastings
- Physical Therapy Program, Washington University School of Medicine, Saint Louis, Missouri, USA
| | - Jie Zheng
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, Saint Louis, Missouri, USA
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13
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Gani F, Jammeh ML, Zayed MA. Modified bare-back micro-retrograde tibial arterial access to facilitate peripheral endovascular therapy. J Vasc Surg Cases Innov Tech 2023; 9:101204. [PMID: 37333864 PMCID: PMC10273279 DOI: 10.1016/j.jvscit.2023.101204] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 04/12/2023] [Indexed: 06/20/2023] Open
Abstract
Patients with critical limb threatening ischemia often present with complex segmental peripheral arterial chronic total occlusions, which might not be amenable to traditional antegrade revascularization techniques. For these patients, alternative retrograde revascularization techniques could be necessary. In the present report, we describe a novel modified retrograde cannulation technique using a bare back technique that eliminates the need for conventional tibial access sheath placement and, instead, facilitates distal arterial blood sampling, blood pressure monitoring, retrograde administration of contrast agents and vasoactive substances, and a rapid-exchange strategy. This cannulation strategy can serve as part of the armamentarium in the treatment of patients with complex peripheral arterial occlusions.
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Affiliation(s)
- Faiz Gani
- Department of Surgery, School of Medicine, Washington University in St Louis, St Louis, MO
| | - Momodou L. Jammeh
- Department of Surgery, School of Medicine, Washington University in St Louis, St Louis, MO
| | - Mohamed A. Zayed
- Department of Surgery, School of Medicine, Washington University in St Louis, St Louis, MO
- Department of Radiology, School of Medicine, Washington University in St Louis, St Louis, MO
- Department of Biomedical Engineering, McKelvey School of Engineering, Washington University in St Louis, St Louis, MO
- Veterans Affairs St Louis Health Care System, St Louis, MO
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14
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Hartquist CM, Lee JV, Qiu MY, Suskin C, Chandrasekaran V, Lowe HR, Zayed MA, Osbun JW, Genin GM. Stability of navigation in catheter-based endovascular procedures. bioRxiv 2023:2023.06.02.543219. [PMID: 37333419 PMCID: PMC10274636 DOI: 10.1101/2023.06.02.543219] [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: 06/20/2023]
Abstract
Endovascular procedures provide surgeons and other interventionalists with minimally invasive methods to treat vascular diseases by passing guidewires, catheters, sheaths and treatment devices into the vasculature to and navigate toward a treatment site. The efficiency of this navigation affects patient outcomes, but is frequently compromised by catheter "herniation", in which the catheter-guidewire system bulges out from the intended endovascular pathway so that the interventionalist can no longer advance it. Here, we showed herniation to be a bifurcation phenomenon that can be predicted and controlled using mechanical characterizations of catheter-guidewire systems and patientspecific clinical imaging. We demonstrated our approach in laboratory models and, retrospectively, in patients who underwent procedures involving transradial neurovascular procedures with an endovascular pathway from the wrist, up in the arm, around the aortic arch, and into the neurovasculature. Our analyses identified a mathematical navigation stability criterion that predicted herniation in all of these settings. Results show that herniation can be predicted through bifurcation analysis, and provide a framework for selecting catheter-guidewire systems to avoid herniation in specific patient anatomy.
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15
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Li R, Zheng J, Zayed MA, Saffitz JE, Woodard PK, Jha AK. Carotid atherosclerotic plaque segmentation in multi-weighted MRI using a two-stage neural network: advantages of training with high-resolution imaging and histology. Front Cardiovasc Med 2023; 10:1127653. [PMID: 37293278 PMCID: PMC10244753 DOI: 10.3389/fcvm.2023.1127653] [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: 12/19/2022] [Accepted: 04/27/2023] [Indexed: 06/10/2023] Open
Abstract
Introduction A reliable and automated method to segment and classify carotid artery atherosclerotic plaque components is needed to efficiently analyze multi-weighted magnetic resonance (MR) images to allow their integration into patient risk assessment for ischemic stroke. Certain plaque components such as lipid-rich necrotic core (LRNC) with hemorrhage suggest a greater likelihood of plaque rupture and stroke event. Assessment for presence and extent of LRNC could assist in directing treatment with impact upon patient outcomes. Methods To address the need to accurately determine the presence and extent of plaque components on carotid plaque MRI, we proposed a two-staged deep-learning-based approach that consists of a convolutional neural network (CNN), followed by a Bayesian neural network (BNN). The rationale for the two-stage network approach is to account for the class imbalance of vessel wall and background by providing an attention mask to the BNN. A unique feature of the network training was to use ground truth defined by both high-resolution ex vivo MRI data and histopathology. More specifically, standard resolution 1.5 T in vivo MR image sets with corresponding high resolution 3.0 T ex vivo MR image sets and histopathology image sets were used to define ground-truth segmentations. Of these, data from 7 patients was used for training and from the remaining two was used for testing the proposed method. Next, to evaluate the generalizability of the method, we tested the method with an additional standard resolution 3.0 T in vivo data set of 23 patients obtained from a different scanner. Results Our results show that the proposed method yielded accurate segmentation of carotid atherosclerotic plaque and outperforms not only manual segmentation by trained readers, who did not have access to the ex vivo or histopathology data, but also three state-of-the-art deep-learning-based segmentation methods. Further, the proposed approach outperformed a strategy where the ground truth was generated without access to the high resolution ex vivo MRI and histopathology. The accurate performance of this method was also observed in the additional 23-patient dataset from a different scanner. Conclusion In conclusion, the proposed method provides a mechanism to perform accurate segmentation of the carotid atherosclerotic plaque in multi-weighted MRI. Further, our study shows the advantages of using high-resolution imaging and histology to define ground truth for training deep-learning-based segmentation methods.
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Affiliation(s)
- Ran Li
- Mallinckrodt Institute of Radiology, Washington University in St. Louis, St. Louis, MO, United States
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, United States
| | - Jie Zheng
- Mallinckrodt Institute of Radiology, Washington University in St. Louis, St. Louis, MO, United States
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, United States
| | - Mohamed A. Zayed
- Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO, United States
| | - Jeffrey E. Saffitz
- Department of Pathology, Beth Israel Deaconess Medical Center, Boston, MA, United States
| | - Pamela K. Woodard
- Mallinckrodt Institute of Radiology, Washington University in St. Louis, St. Louis, MO, United States
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, United States
| | - Abhinav K. Jha
- Mallinckrodt Institute of Radiology, Washington University in St. Louis, St. Louis, MO, United States
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, United States
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16
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Zheng J, Li R, Dickey EE, Yan Y, Zayed MA, Zellers JA, Hastings MK. Regional skeletal muscle perfusion distribution in diabetic feet may differentiate short-term healed foot ulcers from non-healed ulcers. Eur Radiol 2023; 33:3303-3311. [PMID: 36719497 PMCID: PMC10121766 DOI: 10.1007/s00330-023-09405-6] [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: 10/07/2022] [Revised: 12/13/2022] [Accepted: 12/23/2022] [Indexed: 02/01/2023]
Abstract
OBJECTIVES The purpose of this study was to leverage a magnetic resonance imaging (MRI) approach to characterize foot perfusion distribution in patients with diabetes, with or without foot ulcers, and determine the ability of the regional perfusion measurements to identify ulcer-healing status. METHODS Three groups of participants (n = 15 / group) were recruited: controls (without diabetes), type II diabetes, and type II diabetes with foot ulcers. All participants underwent MRI evaluating foot perfusion in three muscle layers (from plantar to dorsal) at rest and during a standardized toe-flexion exercise. The exercise perfusion and perfusion reserve values were analyzed around and away from ulcers. Participants with foot ulcers were followed up 3 months after the MRI exams to determine the foot healing status. RESULTS Foot plantar muscle perfusion reserves were progressively lower from controls to diabetes, and to diabetes with foot ulcers (e.g., 2.58 ± 0.67, 1.48 ± 0.71, 1.12 ± 0.35, p < 0.001). In controls, the plantar layer had significantly higher perfusion reserve than the dorsal layer, whereas in either diabetes group, there was no significant difference in perfusion reserve among muscle layers. Using the ratio of total exercise perfusion around ulcers to that away from ulcers, the sensitivity and specificity to differentiate healing from non-healed ulcers were 100% and 86%, respectively. CONCLUSIONS Our study reveals significantly different foot perfusion distribution among controls, diabetes, and diabetes with foot ulcers. The prognostic value of MRI regional perfusion assessments has the potential to monitor interventions to improve ulcer healing outcomes. KEY POINTS • Contrast-free MRI permits quantitative assessment of regional foot muscle perfusion at rest and during isometric exercise. • Patients with diabetes and foot ulcers, without clinical evidence of peripheral arterial disease, had significantly impaired foot muscle perfusion and perfusion reserve. • Regional foot perfusion distribution may be used to predict the short-term healing status of foot ulcers in diabetes.
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Affiliation(s)
- Jie Zheng
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, 4525 Scott Ave, Room 3114, St. Louis, MO, USA.
| | - Ran Li
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, 4525 Scott Ave, Room 3114, St. Louis, MO, USA
| | - Erin E Dickey
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, 4525 Scott Ave, Room 3114, St. Louis, MO, USA
| | - Yan Yan
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Mohamed A Zayed
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Jennifer A Zellers
- Program in Physical Therapy, Washington University School of Medicine, St. Louis, MO, USA
| | - Mary K Hastings
- Program in Physical Therapy, Washington University School of Medicine, St. Louis, MO, USA
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Hassan Fawzy K, Zayed MA, Yossri Frag E. Chemically modified flubendazole carbon electrochemical sensor for aluminum determination in food stuff, Multivitamin syrup and real water samples supported by DFT calculations, IR and morphological tools. Food Chem 2023; 421:136197. [PMID: 37116440 DOI: 10.1016/j.foodchem.2023.136197] [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: 02/09/2023] [Revised: 04/12/2023] [Accepted: 04/16/2023] [Indexed: 04/30/2023]
Abstract
Aluminum is a key component in nearly nourishment stuffs and medications. It is also found in treated drinking water in the form of reactive species, and aluminum salts are commonly utilized as flocculants in water treatment. Meanwhile, it was not thought to be a dangerous metal for people, but research showed a possible link with Alzheimer's disease, breast cancer, autism, and aluminum. Controlling the amount of aluminum in food processing, agriculture, and drinking water is crucial, thus newly synthesized Al(III) ion selective electrode based on innocuous reagent, flubendazole drug, has been developed. The electrode displayed Nernstian slopes of 20.11 0.47 mV decade-1 at 25 ± 1 °C, covering a wide concentration range of Al(III) from 1 × 10-7 to 1 × 10-1 mol L-1. The response mechanism is studied using IR, computational calculations, morphological tools. The developed sensor has been utilized to accurately measure Al(III) ions in genuine water samples, multivitamin syrup, and food stuff.
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Affiliation(s)
| | - M A Zayed
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Eman Yossri Frag
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt.
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18
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Sastriques-Dunlop S, Elizondo-Benedetto S, Arif B, Meade R, Zaghloul MS, English SJ, Liu Y, Zayed MA. Ketosis Prevents Abdominal Aortic Aneurysm Rupture Through CCR2 Downregulation and Enhanced MMP Balance. bioRxiv 2023:2023.02.21.529460. [PMID: 36865192 PMCID: PMC9980063 DOI: 10.1101/2023.02.21.529460] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Abdominal aortic aneurysms (AAAs) are common in aging populations, and AAA rupture is associated with high morbidity and mortality. There is currently no effective medical preventative therapy for AAAs to avoid rupture. It is known that the monocyte chemoattractant protein (MCP-1) / C-C chemokine receptor type 2 (CCR2) axis critically regulates AAA tissue inflammation, matrix-metalloproteinase (MMP) production, and in turn extracellular matrix (ECM) stability. However, therapeutic modulation of the CCR2 axis for AAA disease has so far not been accomplished. Since ketone bodies (KBs) are known to trigger repair mechanisms in response to vascular tissue inflammation, we evaluated whether systemic in vivo ketosis can impact CCR2 signaling, and therefore impact AAA expansion and rupture. To evaluate this, male Sprague-Dawley rats underwent surgical AAA formation using porcine pancreatic elastase (PPE), and received daily β-aminopropionitrile (BAPN) to promote AAA rupture. Animals with formed AAAs received either a standard diet (SD), ketogenic diet (KD), or exogenous KB supplements (EKB). Animals that received KD and EKB reached a state of ketosis, and had significantly reduced AAA expansion and incidence of rupture. Ketosis also led to significantly reduced CCR2, inflammatory cytokine content, and infiltrating macrophages in AAA tissue. Additionally, animals in ketosis had improved balance in aortic wall matrix-metalloproteinase (MMP), reduced extracellular matrix (ECM) degradation, and higher aortic media Collagen content. This study demonstrates that ketosis plays an important therapeutic role in AAA pathobiology, and provides the impetus for future studies investigating the role of ketosis as a preventative strategy for individuals with AAAs.
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Zaghloul MS, Jammeh M, Gibson A, Luo S, Chadwick-Mansker K, Liu Q, Yan Y, Zayed MA. Chronic anti-coagulation therapy reduced mortality in patients with high cardiovascular risk early in COVID-19 pandemic. Thromb J 2023; 21:14. [PMID: 36717941 PMCID: PMC9885912 DOI: 10.1186/s12959-023-00460-z] [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: 11/20/2022] [Accepted: 01/28/2023] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND Coronavirus disease 2019 (COVID-19) is associated with provoked thrombo-inflammatory responses. Early in the COVID-19 pandemic this was thought to contribute to hypercoagulability and multi-organ system complications in infected patients. Limited studies have evaluated the impact of therapeutic anti-coagulation therapy (AC) in alleviating these risks in COVID-19 positive patients. Our study aimed to investigate whether long-term therapeutic AC can decrease the risk of multi-organ system complications (MOSC) including stroke, limb ischemia, gastrointestinal (GI) bleeding, in-hospital and intensive care unit death in COVID-19 positive patients hospitalized during the early phase of the pandemic in the United States. METHODS A retrospective analysis was conducted of all COVID-19 positive United States Veterans between March 2020 and October 2020. Patients receiving continuous outpatient therapeutic AC for a least 90 days prior to their initial COVID-19 positive test were assigned to the AC group. Patients who did not receive AC were included in a control group. We analyzed the primary study outcome of MOSC between the AC and control groups using binary logistic regression analysis (Odd-Ratio; OR). RESULTS We identified 48,066 COVID-19 patients, of them 879 (1.8%) were receiving continuous therapeutic AC. The AC cohort had significantly worse comorbidities than the control group. On the adjusted binary logistic regression model, therapeutic AC significantly decreased in-hospital mortality rate (OR; 0.67, p = 0.04), despite a higher incidence of GI bleeding (OR; 4.00, p = 0.02). However, therapeutic AC did not significantly reduce other adverse events. CONCLUSION AC therapy reduced in-hospital death early in the COVID-19 pandemic among patients who were hospitalized with the infection. However, it did not decrease the risk of MOSC. Additional trials are needed to determine the effectiveness of AC in preventing complications associated with ongoing emerging strains of the COVID-19 virus.
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Affiliation(s)
- Mohamed S Zaghloul
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, Campus Box 8109, 660 South Euclid Avenue, St. Louis, MO, 63110-1093, USA
| | - Momodou Jammeh
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, Campus Box 8109, 660 South Euclid Avenue, St. Louis, MO, 63110-1093, USA
| | - Andrew Gibson
- Veterans Affairs St. Louis Health Care System, St. Louis, MO, USA
| | - Suhong Luo
- Department of Hematology, Washington University School of Medicine, St. Louis, MO, USA
| | - Kelley Chadwick-Mansker
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, Campus Box 8109, 660 South Euclid Avenue, St. Louis, MO, 63110-1093, USA
- Veterans Affairs St. Louis Health Care System, St. Louis, MO, USA
| | - Qianjin Liu
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Yan Yan
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, Campus Box 8109, 660 South Euclid Avenue, St. Louis, MO, 63110-1093, USA
- Veterans Affairs St. Louis Health Care System, St. Louis, MO, USA
| | - Mohamed A Zayed
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, Campus Box 8109, 660 South Euclid Avenue, St. Louis, MO, 63110-1093, USA.
- Veterans Affairs St. Louis Health Care System, St. Louis, MO, USA.
- Department of Radiology, Washington University School of Medicine, St. Louis, MO, USA.
- Division of Molecular Cell Biology, Washington University School of Medicine, St. Louis, MO, USA.
- Department of Biomedical Engineering, McKelvey School of Engineering, Washington University, St. Louis, MO, USA.
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20
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Toczek J, Gona K, Liu Y, Ahmad A, Ghim M, Ojha D, Kukreja G, Salarian M, Luehmann H, Heo GS, Guzman RJ, Ochoa Chaar CI, Tellides G, Hassab AH, Ye Y, Shoghi KI, Zayed MA, Gropler RJ, Sadeghi MM. Positron Emission Tomography Imaging of Vessel Wall Matrix Metalloproteinase Activity in Abdominal Aortic Aneurysm. Circ Cardiovasc Imaging 2023; 16:e014615. [PMID: 36649454 PMCID: PMC9858355 DOI: 10.1161/circimaging.122.014615] [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: 06/21/2022] [Accepted: 10/31/2022] [Indexed: 01/19/2023]
Abstract
BACKGROUND Matrix metalloproteinases (MMPs) play a key role in the pathogenesis of abdominal aortic aneurysm (AAA). Imaging aortic MMP activity, especially using positron emission tomography to access high sensitivity, quantitative data, could potentially improve AAA risk stratification. Here, we describe the design, synthesis, characterization, and evaluation in murine AAA and human aortic tissue of a first-in-class MMP-targeted positron emission tomography radioligand, 64Cu-RYM2. METHODS The broad spectrum MMP inhibitor, RYM2 was synthetized, and its potency as an MMP inhibitor was evaluated by a competitive inhibition assay. Toxicology studies were performed. Tracer biodistribution was evaluated in a murine model of AAA induced by angiotensin II infusion in Apolipoprotein E-deficient mice. 64Cu-RYM2 binding to normal and aneurysmal human aortic tissues was assessed by autoradiography. RESULTS RYM2 functioned as an MMP inhibitor with nanomolar affinities. Toxicology studies showed no adverse reaction in mice. Upon radiolabeling with Cu-64, the resulting tracer was stable in murine and human blood in vitro. Biodistribution and metabolite analysis in mice showed rapid renal clearance and acceptable in vivo stability. In vivo positron emission tomography/computed tomography in a murine model of AAA showed a specific aortic signal, which correlated with ex vivo measured MMP activity and Cd68 gene expression. 64Cu-RYM2 specifically bound to normal and aneurysmal human aortic tissues in correlation with MMP activity. CONCLUSIONS 64Cu-RYM2 is a first-in-class MMP-targeted positron emission tomography tracer with favorable stability, biodistribution, performance in preclinical AAA, and importantly, specific binding to human tissues. These data set the stage for 64Cu-RYM2-based translational imaging studies of vessel wall MMP activity, and indirectly, inflammation, in AAA.
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Affiliation(s)
- Jakub Toczek
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT (USA)
- Veterans Affairs Connecticut Healthcare System, West Haven, CT (USA)
| | - Kiran Gona
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT (USA)
- Veterans Affairs Connecticut Healthcare System, West Haven, CT (USA)
| | - Yongjian Liu
- Department of Radiology, Washington University, St. Louis, MO (USA)
| | - Azmi Ahmad
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT (USA)
- Veterans Affairs Connecticut Healthcare System, West Haven, CT (USA)
| | - Mean Ghim
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT (USA)
- Veterans Affairs Connecticut Healthcare System, West Haven, CT (USA)
| | - Devi Ojha
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT (USA)
- Veterans Affairs Connecticut Healthcare System, West Haven, CT (USA)
| | - Gunjan Kukreja
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT (USA)
- Veterans Affairs Connecticut Healthcare System, West Haven, CT (USA)
| | - Mani Salarian
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT (USA)
- Veterans Affairs Connecticut Healthcare System, West Haven, CT (USA)
| | - Hannah Luehmann
- Department of Radiology, Washington University, St. Louis, MO (USA)
| | - Gyu Seong Heo
- Department of Radiology, Washington University, St. Louis, MO (USA)
| | - Raul J. Guzman
- Division of Vascular Surgery and Endovascular Therapy, Department of Surgery, Yale School of Medicine, New Haven, CT (USA)
| | - Cassius I. Ochoa Chaar
- Division of Vascular Surgery and Endovascular Therapy, Department of Surgery, Yale School of Medicine, New Haven, CT (USA)
| | - George Tellides
- Veterans Affairs Connecticut Healthcare System, West Haven, CT (USA)
- Department of Surgery, Yale University School of Medicine, New Haven, CT (USA)
| | | | - Yunpeng Ye
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT (USA)
- Veterans Affairs Connecticut Healthcare System, West Haven, CT (USA)
| | | | - Mohamed A. Zayed
- Department of Surgery, Washington University, St. Louis, MO (USA)
| | | | - Mehran M. Sadeghi
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT (USA)
- Veterans Affairs Connecticut Healthcare System, West Haven, CT (USA)
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21
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Zaghloul MS, Jammeh M, Gibson A, Luo S, Chadwick-Mansker K, Liu Q, Yan Y, Zayed MA. Chronic Anti-Coagulation Therapy Reduced Mortality In Patients With High Cardiovascular Risk Early In COVID-19 Pandemic. Res Sq 2022:rs.3.rs-2252262. [PMID: 36415466 PMCID: PMC9681047 DOI: 10.21203/rs.3.rs-2252262/v1] [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] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background: Coronavirus disease 2019 (COVID-19) is associated with provoked thrombo-inflammatory responses. Early in the COVID-19 pandemic this was thought to contribute to hypercoagulability and multi-organ system complications in infected patients. Limited studies have evaluated the impact of therapeutic anti-coagulation therapy (AC) in alleviate these risks in COVID-19 positive patients. Our study aimed to investigate whether long-term therapeutic AC can decrease the risk of multi-organ system complications (MOSC) including stroke, limb ischemia, gastrointestinal (GI) bleeding, in-hospital and intensive care unit death in COVID-19 positive patients during the early phase of the pandemic in the United States. Methods: A retrospective analysis was conducted of all COVID-19 positive United States Veterans between March 2020 and October 2020. Patients receiving continuous therapeutic AC for a least 30 days prior to or after their initial COVID-19 positive test were assigned to the AC group. Patients who did not receive AC were included in a control group. We analyzed the primary study outcome of MOSC between the AC and control groups using binary logistic regression analysis (Odd-Ratio; OR). Results: We identified 48,066 COVID-19 patients, of them 879 (1.8%) were receiving continuous therapeutic AC. The AC cohort had significantly worse comorbidities than the control group. On the adjusted binary logistic regression model, therapeutic AC significantly decreased in-hospital mortality rate (OR; 0.67, p = 0.04), despite a higher incidence of GI bleeding (OR; 4.00, p = 0.02). However, therapeutic AC did not significantly reduce other adverse events. Conclusion: AC therapy reduced in-hospital death early in the COVID-19 pandemic among patients who were hospitalized with the infection. However, it did not decrease the risk of MOSC. Additional trials are needed to determine the effectiveness of AC in preventing complications associated with ongoing emerging strains of the COVID-19 virus.
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Affiliation(s)
| | | | | | - Suhong Luo
- Washington University School of Medicine
| | | | | | - Yan Yan
- Washington University School of Medicine
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22
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Zaghloul MS, Jammeh M, Gibson A, Luo S, Chadwick-Mansker K, Liu Q, Yan Y, Zayed MA. Chronic Anti-Coagulation Therapy Reduced Mortality In Patients With High Cardiovascular Risk Early In COVID-19 Pandemic. Res Sq 2022:rs.3.rs-2252262. [PMID: 36415466 PMCID: PMC9681047 DOI: 10.21203/rs.3.rs-2252262/v2] [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] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Background: Coronavirus disease 2019 (COVID-19) is associated with provoked thrombo-inflammatory responses. Early in the COVID-19 pandemic this was thought to contribute to hypercoagulability and multi-organ system complications in infected patients. Limited studies have evaluated the impact of therapeutic anti-coagulation therapy (AC) in alleviate these risks in COVID-19 positive patients. Our study aimed to investigate whether long-term therapeutic AC can decrease the risk of multi-organ system complications (MOSC) including stroke, limb ischemia, gastrointestinal (GI) bleeding, in-hospital and intensive care unit death in COVID-19 positive patients during the early phase of the pandemic in the United States. Methods: A retrospective analysis was conducted of all COVID-19 positive United States Veterans between March 2020 and October 2020. Patients receiving continuous therapeutic AC for a least 30 days prior to or after their initial COVID-19 positive test were assigned to the AC group. Patients who did not receive AC were included in a control group. We analyzed the primary study outcome of MOSC between the AC and control groups using binary logistic regression analysis (Odd-Ratio; OR). Results: We identified 48,066 COVID-19 patients, of them 879 (1.8%) were receiving continuous therapeutic AC. The AC cohort had significantly worse comorbidities than the control group. On the adjusted binary logistic regression model, therapeutic AC significantly decreased in-hospital mortality rate (OR; 0.67, p = 0.04), despite a higher incidence of GI bleeding (OR; 4.00, p = 0.02). However, therapeutic AC did not significantly reduce other adverse events. Conclusion: AC therapy reduced in-hospital death early in the COVID-19 pandemic among patients who were hospitalized with the infection. However, it did not decrease the risk of MOSC. Additional trials are needed to determine the effectiveness of AC in preventing complications associated with ongoing emerging strains of the COVID-19 virus.
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Affiliation(s)
| | | | | | - Suhong Luo
- Washington University School of Medicine
| | | | | | - Yan Yan
- Washington University School of Medicine
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23
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Elshaer IA, Zayed MA. Before and during the COVID-19 Pandemic, Physical Fitness Association with Mental Health among Higher Education Students: A Multi-Group Analysis Model. Int J Environ Res Public Health 2022; 19:15393. [PMID: 36430110 PMCID: PMC9696341 DOI: 10.3390/ijerph192215393] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/14/2022] [Accepted: 11/15/2022] [Indexed: 06/16/2023]
Abstract
The coronavirus disease 2019 (COVID-19) pandemic, caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), created a significant problem people's health around the world. The mental and physical health of entire populations has been negatively impacted due to the introduction of several restriction methods. Maintaining a specific physical activity and fitness level is crucial given the pandemic situation. The connection between physical fitness and mental health has recently received growing attention. In contrast to the message from physiological research, which lauds the general benefits of fitness for physical health, the corresponding psychological literature reveals a more complex relationship. This paper outlines the research evidence, focusing on the relationship between physical fitness and depression, anxiety, and stress before and during the COVID-19 pandemic. Data were obtained from 390 higher education students (measuring their perception before and during the pandemic). They were analyzed by a structural equation modeling multi-group analysis to detect the variance in the test relationship before and during the COVID-19 pandemic. Theoretical and empirical implications are also discussed.
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Affiliation(s)
- Ibrahim A. Elshaer
- Management Department, College of Business Administration, King Faisal University, Al-Hassa 31982, Saudi Arabia
- Faculty of Tourism and Hotel Management, Suez Canal University, Ismailia 41522, Egypt
| | - Mohamed A. Zayed
- Deanship of Student Affairs, King Faisal University, Al-Hassa 31982, Saudi Arabia
- Department of Fitness, Gymnastics and Sports Show, Faculty of Physical Education Alexandria University, Alexandria 21625, Egypt
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24
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Zayed MA, Sultan S, Alsaab HO, Yousof SM, Alrefaei GI, Alsubhi NH, Alkarim S, Al Ghamdi KS, Bagabir SA, Jana A, Alghamdi BS, Atta HM, Ashraf GM. Stem-Cell-Based Therapy: The Celestial Weapon against Neurological Disorders. Cells 2022; 11:3476. [PMID: 36359871 PMCID: PMC9655836 DOI: 10.3390/cells11213476] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 10/15/2022] [Accepted: 10/24/2022] [Indexed: 09/01/2023] Open
Abstract
Stem cells are a versatile source for cell therapy. Their use is particularly significant for the treatment of neurological disorders for which no definitive conventional medical treatment is available. Neurological disorders are of diverse etiology and pathogenesis. Alzheimer's disease (AD) is caused by abnormal protein deposits, leading to progressive dementia. Parkinson's disease (PD) is due to the specific degeneration of the dopaminergic neurons causing motor and sensory impairment. Huntington's disease (HD) includes a transmittable gene mutation, and any treatment should involve gene modulation of the transplanted cells. Multiple sclerosis (MS) is an autoimmune disorder affecting multiple neurons sporadically but induces progressive neuronal dysfunction. Amyotrophic lateral sclerosis (ALS) impacts upper and lower motor neurons, leading to progressive muscle degeneration. This shows the need to try to tailor different types of cells to repair the specific defect characteristic of each disease. In recent years, several types of stem cells were used in different animal models, including transgenic animals of various neurologic disorders. Based on some of the successful animal studies, some clinical trials were designed and approved. Some studies were successful, others were terminated and, still, a few are ongoing. In this manuscript, we aim to review the current information on both the experimental and clinical trials of stem cell therapy in neurological disorders of various disease mechanisms. The different types of cells used, their mode of transplantation and the molecular and physiologic effects are discussed. Recommendations for future use and hopes are highlighted.
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Affiliation(s)
- Mohamed A. Zayed
- Physiology Department, Faculty of Medicine in Rabigh, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Physiology Department, Faculty of Medicine, Menoufia University, Menoufia 32511, Egypt
| | - Samar Sultan
- Medical Laboratory Technology Department, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Regenerative Medicine Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Hashem O. Alsaab
- Department of Pharmaceutics and Pharmaceutical Technology, College of Pharmacy, Taif University, Taif 21944, Saudi Arabia
| | - Shimaa Mohammad Yousof
- Physiology Department, Faculty of Medicine in Rabigh, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Medical Physiology Department, Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt
| | - Ghadeer I. Alrefaei
- Department of Biology, College of Science, University of Jeddah, Jeddah 21589, Saudi Arabia
| | - Nouf H. Alsubhi
- Department of Biological Sciences, College of Science & Arts, King Abdulaziz University, Rabigh 21911, Saudi Arabia
| | - Saleh Alkarim
- Embryonic and Cancer Stem Cell Research Group, King Fahad Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Biology Department, Faculty of Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Embryonic Stem Cells Research Unit, Biology Department, Faculty of Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Kholoud S. Al Ghamdi
- Department of Physiology, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia
| | - Sali Abubaker Bagabir
- Genetic Unit, Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, Jazan University, Jazan 45142, Saudi Arabia
| | - Ankit Jana
- School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT) Deemed to be University, Campus-11, Patia, Bhubaneswar 751024, Odisha, India
| | - Badrah S. Alghamdi
- Department of Physiology, Faculty of Medicine, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Pre-Clinical Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Hazem M. Atta
- Clinical Biochemistry Department, Faculty of Medicine in Rabigh, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Cairo University, Cairo 11562, Egypt
| | - Ghulam Md Ashraf
- Department of Medical Laboratory Sciences, College of Health Sciences, University of Sharjah, University City, Sharjah 27272, United Arab Emirates
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25
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Tay S, Zaghloul MS, Shafqat M, Yang C, Desai KA, De Silva G, Sanchez LA, Zayed MA. Totally percutaneous endovascular repair for ruptured abdominal aortic aneurysms. Front Surg 2022; 9:1040929. [PMID: 36338637 PMCID: PMC9634472 DOI: 10.3389/fsurg.2022.1040929] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 10/04/2022] [Indexed: 11/06/2022] Open
Abstract
Purpose The PEVAR Trial demonstrated that compared to open femoral exposure, elective percutaneous endovascular AAA repair (ePEVAR) is associated with decreased perioperative morbidity and access site complications. We hypothesized that PEVAR for ruptured AAA (rPEVAR) may also improve perioperative morbidity compared to open femoral exposure (rEVAR). There are currently no reports that evaluate the utility and outcomes of rPEVAR. Materials and methods From 2015 to 2021, all patients who underwent an endovascular repair of a ruptured AAA at a single institution were included in the study and grouped into rPEVAR and rEVAR. Demographics, procedural details (successful preclose technique, conversion to femoral cutdown), postoperative variables (blood transfusion, ICU and hospital length of stay) and short-term outcomes (30-day major adverse events (30-day MAE) and 30-day femoral access-site complications (30-day FAAC)) were collected and compared with 50 historical ePEVAR patients from the PEVAR Trial. Statistical significance was determined using χ 2 or Fisher's exact test for categorical variables, and Mann-Whitney U-test for continuous variables. Results 35 patients were identified (21 rPEVAR; 14 rEVAR), 86% were male with a mean age of 72 ± 9 years. All patients underwent emergent endovascular aortic repair with 100% technical success. Seventeen patients (49%) presented with evidence of hemorrhagic shock and 22 patients (63%) had blood transfusion. 30-day MAE occurred in 12 patients (34%) (7 rPEVAR; 5 rEVAR). There was no difference in demographic, perioperative outcomes and 30-day MAE rate between rPEVAR and rEVAR patients. Compared to ePEVAR patient (from PEVAR trial), rPEVAR patients had higher rate of 30-day MAE (34% vs. 6%; p < 0.006) but no difference in 30-day FAAC (19% vs. 12%; p = 0.54). The success rate of the preclose technique was higher in ePEVAR compared to rPEVAR (96% vs. 76%; p = 0.02), but the rate of conversion to femoral cutdown was similar between the two groups (10% vs. 4%; p = 0.57). Conclusion Emergent rPEVAR appears to have similar outcomes when compared to rEVAR. Although patients undergoing rPEVAR have higher 30-day major adverse events rate compared to ePEVAR, the method of percutaneous femoral cannulation does not appear to increase the overall procedural or 30-day femoral artery access-site complications.
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Affiliation(s)
- Shirli Tay
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States
| | - Mohamed S. Zaghloul
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States
| | - Mehreen Shafqat
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States
| | - Chao Yang
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States
- Department of Vascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Kshitij A. Desai
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States
| | - Gayan De Silva
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States
| | - Luis A. Sanchez
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States
| | - Mohamed A. Zayed
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States
- Division of Molecular Cell Biology, Washington University School of Medicine, St. Louis, MO, United States
- McKelvey School of Engineering, Department of Biomedical Engineering, Washington Univesrity, St. Louis, MO, United States
- Department of Surgery, Veterans Affairs St. Louis Health Care System, St. Louis, MO, United States
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26
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Zayed MA, Elshaer IA. Physical Activities and Learning Experience of Higher Education Students: Mediating Role of Quality of Life and Physical Self-Esteem. Int J Environ Res Public Health 2022; 19:13417. [PMID: 36293998 PMCID: PMC9602441 DOI: 10.3390/ijerph192013417] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/12/2022] [Accepted: 10/16/2022] [Indexed: 06/16/2023]
Abstract
The impacts of physical activities (PAs) on psychological and physical health consequences have been examined in both nonclinical and clinical contexts. Although PAs' influences on physical consequences are regularly beneficial, the psychological positive impacts are less well-understood. This study investigates the effects of PA on physical consequences (i.e., physical self-esteem) and psychological and cognitive consequences (i.e., quality of life and learning experience). PA has been found to improve quality of life (QOL), learning experience (LP), and physical self-esteem. Mixed findings from prior studies suggested that the relationship between these variables might be direct or indirect. Data were collected via a self-administrated questionnaire from 510 higher education students in different Kingdom of Saudi Arabia (KSA) universities. The collected data were analyzed by structural equation modeling (SEM) and the SmartPLS 4 program. The SEM results show that PAs directly help in enhancing the student learning experience. The results support the mediating role of student physical self-esteem and quality of life in the relationship between physical activities and learning experience. Several theoretical and practical implications were elaborated on and discussed, along with limitations and further research opportunities.
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Affiliation(s)
- Mohamed A. Zayed
- Deanship of Student Affairs, King Faisal University, Al-Hassa 31982, Saudi Arabia
- Department of Fitness, Gymnastics and Sports Show, Faculty of Physical Education Alexandria University, Alexandria 21625, Egypt
| | - Ibrahim A. Elshaer
- Management Department, College of Business Administration, King Faisal University, Al-Hassa 31982, Saudi Arabia
- Faculty of Tourism and Hotel Management, Suez Canal University, Ismailia 41522, Egypt
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27
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Taha MM, Rizk MS, Zayed MA, Abdel-Haleem FM, Barhoum A. Non-Enzymatic Phenylboronic Acid-Based Optode Membrane for Glucose Monitoring in Serums of Diabetic Patients and in the Culture Medium of Human Embryos. Sensors (Basel) 2022; 22:7135. [PMID: 36236234 PMCID: PMC9571803 DOI: 10.3390/s22197135] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 08/30/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
Monitoring glucose levels is important not only for diabetics, but also for tracking embryonic development in human embryo culture media. In this study, an optochemical sensor (glucose-selective polymer membrane) was fabricated for the determination of glucose in serum from diabetic patients and the culture media of human embryos. The optode membranes were formulated using polyvinyl chloride (PVC) as the polymer matrix and 4',5'-dibromofluorescein octadecyl ester (ETH 7075) as the chromoionophore. The sensitivity of the optode membranes was optimized using two different plasticizers (tricresyl phosphate-TCP and nitrophenyloctyl ether-NOPE) and three ionophores (nitrophenylboronic acid-NPBA, trifluorophenyboronic acid-TFPBA, 4'-nitrobenzo-15-crown-5) and tested for glucose detection. The best optode membrane was formulated from 49.5% PVC, 49.5% TCP, 1% NPBA, and 1% ETH 7075. It showed a linear dynamic range of 10-3 M to 10-1 M, with a detection limit of 9 × 10-4 M and a response time of 2 min. The detection mechanism involves H-bonding between NPBA and glucose, which was confirmed by Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR). The reaction also involves the formation of boronate esters in basic media with deprotonation of the chromoionophore (ETH 7075), leading to a decrease in UV-Vis absorbance at λmax = 530 nm. The membrane optode was used for glucose determination in synthetic culture medium, commercial embryo culture medium (GLOBAL® TOTAL® W/HEPES), and serum from normal and diabetic patients, showing good accuracy and precision of the optode.
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Affiliation(s)
- Mohamed M. Taha
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt
- Adam International Hospital, Aden Street Mohandesein Anas Ibn Malek, Giza 12411, Egypt
| | - Mahmoud S. Rizk
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Mohamed A. Zayed
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Fatehy M. Abdel-Haleem
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt
- Center for Hazards Mitigation, Environmental Studies and Research (CHMESR), Cairo University, Giza 11795, Egypt
| | - Ahmed Barhoum
- NanoStruc Research Group, Chemistry Department, Faculty of Science, Helwan University, Cairo 11795, Egypt
- National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, D09 V209 Dublin, Ireland
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Albeladi FI, Mostafa MM, Zayed MA, Atta H. Association of Polymorphisms in Antioxidant Enzyme-Encoding Genes with Diabetic Nephropathy in a Group of Saudi Arabian Patients with Type II Diabetes Mellitus. Int J Gen Med 2022; 15:5919-5928. [PMID: 35799998 PMCID: PMC9255407 DOI: 10.2147/ijgm.s367673] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 06/13/2022] [Indexed: 01/15/2023] Open
Abstract
Introduction Purpose Patients and Methods Results Conclusion
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Affiliation(s)
- Fatma I Albeladi
- Department of Nephrology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mostafa M Mostafa
- Department of Clinical Biochemistry, Faculty of Medicine in Rabigh, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Medical Biochemistry and Molecular Biology, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Mohamed A Zayed
- Department of Medical Physiology, Faculty of Medicine in Rabigh, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Medical Physiology, Faculty of Medicine, Menoufia University, Menoufia, Egypt
- Correspondence: Mohamed A Zayed, Department of Medical Physiology, Faculty of Medicine in Rabigh, King Abdulaziz University, Jeddah, 21589, Saudi Arabia, Tel +966562603213, Fax +9666400000, Email
| | - Hazem Atta
- Department of Clinical Biochemistry, Faculty of Medicine in Rabigh, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Medical Biochemistry and Molecular Biology, Faculty of Medicine, Cairo University, Cairo, Egypt
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Jammeh ML, Suggs J, Adams GL, Armstrong EJ, Mustapha J, Zayed MA. Outcomes of Orbital Atherectomy in Patients with Critical Limb Threatening Ischemia and Diabetes. J Crit Limb Ischemia 2022; 2:E29-E37. [PMID: 37066103 PMCID: PMC10103796] [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] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
Purpose Patients with diabetes and critical limb threatening ischemia (CLTI) are at significantly higher risk of limb loss and death. Here we evaluate the outcomes of orbital atherectomy (OA) for treatment of CLTI in patients with and without diabetes. Methods Retrospective analysis of the LIBERTY 360 study was performed to evaluate baseline demographics, and peri-procedural outcomes between patients with CLTI, and with and without diabetes. Hazard ratios (HRs) were determined with Cox regression to examine the impact of OA in patients with diabetes and CLTI over a 3-year follow-up. Results A total of 289 patients (201 with diabetes, 88 without diabetes) with Rutherford classification 4-6 were included. Patients with diabetes had higher proportion of renal disease (48.3% vs 28.4%, p=0.002), prior minor/major limb amputation (26% vs 8%, p<0.005), and presence of wounds (63.2% vs 48.9%, p=0.027). Operative times, radiation dosage, and contrast volume were similar between groups. The rate of distal embolization was higher in patients with diabetes (7.8% vs 1.9%, p=0.01; OR 4.33 [0.99, 18.88], p=0.05). However, at 3-years post-procedure, patients with diabetes had no differences in freedom from target vessel/lesion revascularization (HR 1.09, p=0.73), major adverse events (MAE; HR 1.25, p=0.36), major target limb amputation (HR 1.74, p=0.39), and death (HR 1.11, p=0.72). Conclusion The LIBERTY 360 observed high limb preservation and low MAEs in patients with diabetes and CLTI. Higher distal embolization was observed with OA in patients with diabetes, but OR did not indicate a significant difference in risk between groups.
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Affiliation(s)
- Momodou L. Jammeh
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St Louis, MO 63110
| | - Julia Suggs
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St Louis, MO 63110
| | - George L. Adams
- University of North Carolina at Chapel Hill Rex Health Care System, Raleigh, NC
| | - Ehrin J. Armstrong
- Adventist Health and Vascular Institute at Adventist Health, St. Helena, CA
| | - Jihad Mustapha
- Advanced Cardiac & Vascular Centers for Amputation Prevention, Grand Rapids, MI
| | - Mohamed A. Zayed
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St Louis, MO 63110
- Washington University School of Medicine, Division of Molecular Cell Biology, St. Louis, MO
- Washington University, McKelvey School of Engineering, Department of Biomedical Engineering, St. Louis, MO
- Veterans Affairs St. Louis Health Care System, St. Louis, MO
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30
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Benedetto SE, Zaghloul M, Arif B, Dunlop SS, Zayed MA. Ketosis Prevents Abdominal Aortic Aneurysm Progression and Rupture in Male Rats. JVS Vasc Sci 2022. [DOI: 10.1016/j.jvssci.2022.05.027] [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: 10/18/2022] Open
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31
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Khairy AM, Tohamy MRA, Zayed MA, Mahmoud SF, El-Tahan AM, El-Saadony MT, Mesiha PK. Eco-friendly application of nano-chitosan for controlling potato and tomato bacterial wilt. Saudi J Biol Sci 2022; 29:2199-2209. [PMID: 35531227 PMCID: PMC9073058 DOI: 10.1016/j.sjbs.2021.11.041] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [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: 09/06/2021] [Revised: 11/01/2021] [Accepted: 11/17/2021] [Indexed: 02/02/2023] Open
Abstract
Bacterial wilt is one of the main diseases of Solanum spp., which caused by Ralstonia solanacearum (RS), formerly known as Pseudomonas solanacearum. Different concentrations of chitosan nanoparticles have been evaluated as one of the alternative methods of disease management in vitro and in vivo to reduce the risks of pesticide residues. Results in vitro experiment indicated that RS5 isolate was the most virulence one compared to RS1 and RS3. Increasing concentration of nano-chitosan, lead to increase inhibition zone, and this was observed at higher concentrations (100 and 200 µg/ml). In vivo results showed the highest concentration of spraying chitosan nanoparticles increase percentage reduction of disease incidence and severity, in effected potato and tomato plants. Recorded data of disease incidence and severity in treated potato plants were 78.93% and 71.85%, while on tomato plants were 81.64% and 77.63%, respectively compared to untreated infected potato plants were recorded 15.38%, 20.87%, and tomato plants were 20.98% and 28.64%. Results also revealed that 100 µg/ml of chitosan nanoparticles the lowest treatments used as soil amended curative treatments led to incease percentage reduction of disease incidence and severity, respectively on potato and tomato plants, but less than preventive treatment. The results registered that on potato plant were 54.93% and 52.65%, whilst recorded on tomato plants were 59.93% and 56.74%. Transmission electron microscopy (TEM) micrpgraphs illustrated that morphological of healthy R. solanacearum cells were undesirably stained with uranyl. The electron-dense uranyl acetate dye was limited to the cell surface slightly than the cytoplasm, which designated the integrity of the cell film of healthy cells. While bacterial cells treated with nano-chitosan, showed modification in the external shape, such as lysis of the cell wall and loss of cell flagella. Also, the result of using Random amplified polymorphic DNA (RAPD)-PCR observed that differences in treated Ralstonia solanancearum genotype by nano-chitosan compared to the genotype of the same untreated isolate.
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Affiliation(s)
- Ahmed M Khairy
- Plant Pathology Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | - Mohamed R A Tohamy
- Plant Pathology Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | - Mohamed A Zayed
- Plant Pathology Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | - Samy F Mahmoud
- Department of Biotechnology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Amira M El-Tahan
- Plant Production Department, Arid Lands Cultivation Research Institute, The City of Scientific Research and Technological Applications, SRTA-City. Borg El Arab, Alexandria, Egypt
| | - Mohamed T El-Saadony
- Department of Agricultural Microbiology, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | - Phelimon K Mesiha
- Plant Pathology Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
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Elizondo Benedetto S, Zaghloul M, Arif B, Sastriques Dunlop S, Zayed MA. Abstract 298: Ketosis Prevents Abdominal Aortic Aneurysm Progression And Rupture In Male Rats. Arterioscler Thromb Vasc Biol 2022. [DOI: 10.1161/atvb.42.suppl_1.298] [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: 12/05/2022]
Abstract
Abdominal aortic aneurysms (AAA) are common in aging populations, and its rupture is associated with high mortality. There is no effective medical therapy for the prevention of AAA expansion and rupture. Ketone bodies (KB) are argued to produce novel responses against injury. Serum KB are elevated through a ketogenic diet (KD) or the intake of exogenous KB (EKB). We hypothesize that ketosis can reduce AAA expansion and risk of rupture. Male Sprague-Dawley rats underwent intraluminal exposure to porcine pancreatic elastase (PPE) to induce AAA formation. Rats were also administered daily β-aminopropionitrile (BAPN) to promote AAA rupture. Control rats (N=12) were fed a standard diet (SD). Treated rats were given either a KD (N=9) or EKB (N=10) starting 3 days post AAA induction. Ketosis was verified by blood BHB level >0.5mmol/L. In vivo aortic diameter was evaluated by USG. After 2 weeks, survival animals were harvested, and AAA tissue analysis was performed. Rupture AAA was determined by necropsy. Rats treated with KD consistently remained in ketosis, while rats treated with EKB remained in ketosis for only 8-hour per day. AAA size was significantly reduced (p<0.01 and p<0.05) in both, KD and EKB groups at week 1 and 2 respectively. Rupture rate was also reduced in the KD and EKB groups (22% and 40%, respectively) compared to 67% in the SD group (p=0.03 and 0.12, respectively). AAA trichrome staining demonstrated greater content of collagen in KD and EKB groups when compared to SD group (p=0.08 and 0.02, respectively). AAA gelatin zymography demonstrated significantly decreased active MMP 9 levels in KD and EKB groups (p<0.05) while total MMP 2 was attenuated in the KD group (p<0.01). Ketosis appears to reduce AAA expansion and risk of rupture. This may have resulted from AAA increased collagen deposition as well as decreased MMP activity. These findings provide initial impetus to investigate whether ketosis in patients with small AAAs can prevent expansion and risk of rupture.
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Engel C, Zaghloul M, Meade R, Woodard PK, Gropler RJ, Liu Y, Zayed MA. Abstract 290: Ccr2 Expression Is Increased In Patients With Symptomatic Carotid Arterial Occlusive Disease. Arterioscler Thromb Vasc Biol 2022. [DOI: 10.1161/atvb.42.suppl_1.290] [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: 12/05/2022]
Abstract
Objectives:
Chemokines and their receptors play critical roles in the progression of atherosclerosis. The chemokine receptor, C-C chemokine receptor type 2 (CCR2), mediates an essential role in the differentiation of pro-inflammatory monocytes into macrophages. Recent studies suggest that proinflamatory macrophages in plaques predict plaque progression. While there is no clinical consensus on which patient with asymptomatic carotid artery stenosis would benefit from carotid endarterectomy (CEA), we hypothesized that CCR2 plaque content may predict plaque progression.
Methods:
Carotid plaque of ten patients undergoing elective CEA were harvested from the operating room, paraffin-embedded, sectioned into 5μm segments, immuno-stained for CCR2 and CD68, and imaged. Three 200х500μm regions-of-interest (ROIs) were randomly selected within 200μm of the lumen (superficial intima), outside 200μm of the lumen (deep intima), and the arterial media. Two independent observers evaluated the number of CCR2 and/or CD68 positive cells. Counts in each ROI were averaged and analyzed with Student’s t-test.
Results:
Patients with symptomatic carotid artery stenosis (6/10) demonstrated higher CCR2 and CCR2-CD68 double positive cells within the superficial intima of carotid artery plaques (A, p<0.05, n=10). Similarly, patients with symptomatic disease also showed increased CCR2 in the plaque media (B, p<0.05, n=10). Interestingly, we also observed a higher number of CCR2 positive cells in the media layer of smokers (6/10) compared to non-smokers (C, p<0.05, n=10).
Conclusions:
Our study demonstrates the close association between CCR2 cellular content and the incidence of symptomatic carotid artery disease. Additionally, CCR2 plaque content appears to correlate with risk-factors such as smoking. These studies have important implications regarding the impact of immune modulation on carotid plaque vulnerability in patients with asymptomatic carotid artery stenosis.
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Meade R, Engel C, Belaygorod L, Yin LI, Semenkovich CF, Zayed MA. Abstract 138: Sex Differences In Limb Ischemia Recovery Following Conditional Endothelial Overexpression Of Cept1. Arterioscler Thromb Vasc Biol 2022. [DOI: 10.1161/atvb.42.suppl_1.138] [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: 12/02/2022]
Abstract
Objectives:
Choline enthanolamine phosphotransferase 1 (
CEPT1
), is essential for endothelial
de novo
lipogenesis (DNL) and is elevated in diseased peripheral arterial segments. Women are more sensitive to diet-induced DNL, and those with diabetes have higher incidence of severe peripheral arterial disease (PAD). We therefore hypothesized that women may have higher
CEPT1
content in diseased peripheral arteries and that murine conditional endothelial overexpression of
CEPT1
may lead to sex-specific differences in ischemic recovery.
Methods:
CEPT1
expression was evaluated in diseased peripheral plaque of 7 women and 9 men. A murine endothelial
CEPT1
overexpression model was engineered with Cre-induced expression of a
CEPT1
transgene inserted in a C57BL/6J background. Endothelial
CEPT1
overexpression was evaluated using RT-PCR. Male (n=5) and female (n=5) received Streptozotocin and unilateral femoral artery ligation. Limb perfusion, appearance, and use were then evaluated. Gastrocnemius was stained with H&E, and endothelial Isolectin. Muscle fiber size and microvascular density were analyzed using Student’s t-test.
Results:
Compared to males, female patients have higher
CEPT1
in peripheral segments (n=7, p<0.005; Fig A). Murine endothelial
CEPT1
overexpression had a 7-fold increase in expression compared to control (Fig B). Compared to female mice, males demonstrated improved perfusion (p<0.05; Fig C,D), limb function (p<0.05; Fig E), limb appearance (p<0.05; Fig E), muscle fiber size (p<0.05; Fig F,G), but both has adequate muscle microvascular density (Fig F,H).
Conclusion:
This study reveals a gender difference in peripheral arterial
CEPT1
expression and ischemic recovery following overexpression. Differences do not appear to be directly associated with angiogenesis and may be due to underlying DNL metabolic consequences. These findings may have important implications for the prevalence of severe PAD in diabetic women.
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Affiliation(s)
| | | | | | - LI Yin
- Washington Univ, St. Louis, MO
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Zayed EM, Zayed MA, Radwan MAA, Alminderej FM. Synthesis, characterization, antimicrobial, and docking study of novel 1‐(furanyl)‐3‐(pyrrolyl)propenone‐based ligand and its chelates of 3d‐transition metal ions. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ehab M. Zayed
- Green Chemistry Department National Research Centre Giza Egypt
| | - Mohamed A. Zayed
- Chemistry Department, Faculty of Science Cairo University Giza Egypt
| | - Mohamed A. A. Radwan
- Applied Organic Chemistry Department National Research Centre Giza Egypt
- Department of Chemistry, College of Science Qassim University Buraydah Saudi Arabia
| | - Fahad M. Alminderej
- Department of Chemistry, College of Science Qassim University Buraydah Saudi Arabia
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36
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Tay S, Abdulnabi S, Saffaf O, Harroun N, Yang C, Semenkovich CF, Zayed MA. Comprehensive Assessment of Current Management Strategies for Patients With Diabetes and Chronic Limb-Threatening Ischemia. Clin Diabetes 2021; 39:358-388. [PMID: 34866779 PMCID: PMC8603325 DOI: 10.2337/cd21-0019] [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] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Chronic limb-threatening ischemia (CLTI) is the most severe form of peripheral artery disease. It is estimated that 60% of all nontraumatic lower-extremity amputations performed annually in the United States are in patients with diabetes and CLTI. The consequences of this condition are extraordinary, with substantial patient morbidity and mortality and high socioeconomic costs. Strategies that optimize the success of arterial revascularization in this unique patient population can have a substantial public health impact and improve patient outcomes. This article provides an up-to-date comprehensive assessment of management strategies for patients afflicted by both diabetes and CLTI.
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Affiliation(s)
- Shirli Tay
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St. Louis, MO
| | - Sami Abdulnabi
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St. Louis, MO
| | - Omar Saffaf
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St. Louis, MO
| | - Nikolai Harroun
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St. Louis, MO
| | - Chao Yang
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St. Louis, MO
| | - Clay F. Semenkovich
- Department of Internal Medicine, Division of Endocrinology, Metabolism and Lipid Research, Washington University School of Medicine, St. Louis, MO
| | - Mohamed A. Zayed
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St. Louis, MO
- Division of Molecular Cell Biology, Washington University School of Medicine, St. Louis, MO
- Department of Biomedical Engineering, Washington University McKelvey School of Engineering, St. Louis, MO
- Veterans Affairs St. Louis Health Care System, St. Louis, MO
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37
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Khairy AM, Tohamy MRA, Zayed MA, Ali MAS. Detecting pathogenic bacterial wilt disease of potato using biochemical markers and evaluate resistant in some cultivars. Saudi J Biol Sci 2021; 28:5193-5203. [PMID: 34466097 PMCID: PMC8381064 DOI: 10.1016/j.sjbs.2021.05.045] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/17/2021] [Accepted: 05/18/2021] [Indexed: 11/30/2022] Open
Abstract
Bacterial wilt caused by Ralstonia solanacearum (Smith), is one of the chief severe diseases of potato in warm temperate regions, tropics and subtropics of the world. The study was conducted to isolate and identify bacterial pathogens and select the most resistant cultivars and avoid the decrease in the total value of Egyptian potato exports to the European Union (EU) due to the quarantine restrictions imposed by the EU on potato tubers exported from Egypt affected by bacterial wilt. The results of traditional identification through morphological and serological studies showed that the five isolates were isolated and identified as Ralstonia solanacearum. Furthermore, the results illustrated that RS5 isolate showed the lowest percentage of disease incidence reduction on the three tested potatoes cultivar Bellini, Spunta and Mondial recorded 9.64%, 15.41% and 34.12%, respectively. While, RS8 isolate exhibited the highest effective one the percentage of disease reduction on all tested potato cultivars. This isolate reduced disease incidence 60.60%, 63.21% and 71.66%, compering to the healthy control treatment. The result of molecular identification represent that the probe used in Taq-man (PCR) was of the type (B2) capable to detect only biovar 2 of R. solanacearum bacterial wilt. Furthermore, primer and probe are specific for detection of the race 3 biovar 2 strain. Positive results were obtained in all assays used including IFAS, protein content and SDS-PAGE with all five isolates. So the isolate (RS5) was the most virulence one, followed by RS1, RS3, RS2 and RS8, registered that the tested isolates were R. solanacearum race 3, biovar 2. Also, studies focused on the form of genetic distances and similarities based on pathogenic and plant growth parameters. The results illustrate that the highest genetic similarity (0.998) was found between Bellini and Spunta cultivars as the closest but the lowest value (0.946) was found between Mondial and Bellini as most distant. These results were similarity with genetic distances and SDS-PAGE profile of the three tested potato cultivars.
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Affiliation(s)
- Ahmed M Khairy
- Plant Pathology Department, Faculty of Agric, Zagazig Univ, Egypt
| | | | - Mohamed A Zayed
- Plant Pathology Department, Faculty of Agric, Zagazig Univ, Egypt
| | - Mohamed A S Ali
- Plant Pathology Department, Faculty of Agric, Zagazig Univ, Egypt
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Gibson AK, Yan Y, Chadwick-Mansker K, Zayed MA. Outpatient Chronic Anticoagulation Improves Outcomes in Patients With Coronavirus Disease 2019 and Cardiovascular Risk Factors. J Vasc Surg 2021. [PMCID: PMC8376824 DOI: 10.1016/j.jvs.2021.06.141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Holzem KM, Benrashid E, Jammalamadaka U, Orsay T, Ballard D, Zayed MA. Physician-Modified Endograft Visceral Vessel Alignment Using Rapid Production of Sterilizable, Three-Dimensionally Printed Aortic Models. J Vasc Surg 2021. [DOI: 10.1016/j.jvs.2021.06.201] [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: 11/27/2022]
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40
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Zheng J, Sorensen C, Li R, An H, Hildebolt CF, Zayed MA, Mueller MJ, Hastings MK. Deteriorated regional calf microcirculation measured by contrast-free MRI in patients with diabetes mellitus and relation with physical activity. Diab Vasc Dis Res 2021; 18:14791641211029002. [PMID: 34313140 PMCID: PMC8481746 DOI: 10.1177/14791641211029002] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE To evaluate regional calf muscle microcirculation in people with diabetes mellitus (DM) with and without foot ulcers, compared to healthy control people without DM, using contrast-free magnetic resonance imaging methods. METHODS Three groups of subjects were recruited: non-DM controls, DM, and DM with foot ulcers (DM + ulcer), all with ankle brachial index (ABI) > 0.9. Skeletal muscle blood flow (SMBF) and oxygen extraction fraction (SMOEF) in calf muscle were measured at rest and during a 5-min isometric ankle plantarflexion exercise. Subjects completed the Yale physical activity survey. RESULTS The exercise SMBF (ml/min/100 g) of the medial gastrocnemius muscle were progressively impaired: 63.7 ± 18.9 for controls, 42.9 ± 6.7 for DM, and 36.2 ± 6.2 for DM + ulcer, p < 0.001. Corresponding exercise SMOEF was the lowest in DM + ulcers (0.48 ± 0.09). Exercise SMBF in the soleus muscle was correlated moderately with the Yale physical activity survey (r = 0.39, p < 0.01). CONCLUSIONS Contrast-free MR imaging identified progressively impaired regional microcirculation in medial gastrocnemius muscles of people with DM with and without foot ulcers. Exercise SMBF in the medial gastrocnemius muscle was the most sensitive index and was associated with HbA1c. Lower exercise SMBF in the soleus muscle was associated with lower Yale score.
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Affiliation(s)
- Jie Zheng
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO, USA
- Jie Zheng, Mallinckrodt Institute of Radiology, Washington University School of Medicine, 4525 Scott Ave, Room 3114, St. Louis, MO 63130-4899, USA.
| | - Christopher Sorensen
- The Program in Physical Therapy, Washington University School of Medicine, St. Louis, MO, USA
| | - Ran Li
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Hongyu An
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Charles F Hildebolt
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Mohamed A Zayed
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Michael J Mueller
- The Program in Physical Therapy, Washington University School of Medicine, St. Louis, MO, USA
| | - Mary K Hastings
- The Program in Physical Therapy, Washington University School of Medicine, St. Louis, MO, USA
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Hartquist CM, Chandrasekaran V, Lowe H, Leuthardt EC, Osbun JW, Genin GM, Zayed MA. Quantification of the flexural rigidity of peripheral arterial endovascular catheters and sheaths. J Mech Behav Biomed Mater 2021; 119:104459. [PMID: 33887627 DOI: 10.1016/j.jmbbm.2021.104459] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 02/28/2021] [Accepted: 03/10/2021] [Indexed: 11/18/2022]
Abstract
Endovascular catheter-based technologies have revolutionized the treatment of complex vascular pathology. Catheters and endovascular devices that can be maneuvered through tortuous arterial anatomy have enabled minimally invasive treatment in the peripheral arterial system. Although mechanical factors drive an interventionalist's choice of catheters and sheaths, these decisions are mostly made qualitative and based on personal experience and procedural pattern recognition. However, a definitive quantitative characterization of endovascular tools that are best suited for specific peripheral arterial beds is currently lacking. To establish a foundation for quantitative tool selection in the neurovascular and lower extremity peripheral arterial beds, we developed a nonlinear beam theory method to quantify catheter and sheath flexural rigidity. We applied this assessment to a sampling of commonly utilized commercially available peripheral arterial catheters and sheaths. Our results demonstrated that catheters and sheaths adopted for existing practice patterns to treat peripheral arterial disease in the lower extremities and neurovascular system have different but overlapping ranges of flexural rigidities that were not sensitive to luminal diameters within each procedure type. Our approach provides an accurate and effective method for characterization of flexural rigidity properties of catheters and sheaths, and a foundation for developing future technologies tailored for specific peripheral arterial systems.
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Affiliation(s)
- Chase M Hartquist
- Center for Innovation in Neuroscience and Technology, Washington University in St. Louis, Missouri, USA; McKelvey School of Engineering, Washington University in St. Louis, St. Louis, Missouri, USA; Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Vinay Chandrasekaran
- Center for Innovation in Neuroscience and Technology, Washington University in St. Louis, Missouri, USA; McKelvey School of Engineering, Washington University in St. Louis, St. Louis, Missouri, USA; Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Halle Lowe
- Center for Innovation in Neuroscience and Technology, Washington University in St. Louis, Missouri, USA; McKelvey School of Engineering, Washington University in St. Louis, St. Louis, Missouri, USA; Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Eric C Leuthardt
- Center for Innovation in Neuroscience and Technology, Washington University in St. Louis, Missouri, USA; McKelvey School of Engineering, Washington University in St. Louis, St. Louis, Missouri, USA; Department of Neurological Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Joshua W Osbun
- Center for Innovation in Neuroscience and Technology, Washington University in St. Louis, Missouri, USA; Department of Neurological Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Guy M Genin
- Center for Innovation in Neuroscience and Technology, Washington University in St. Louis, Missouri, USA; McKelvey School of Engineering, Washington University in St. Louis, St. Louis, Missouri, USA; Department of Neurological Surgery, Washington University School of Medicine, St. Louis, Missouri, USA.
| | - Mohamed A Zayed
- Center for Innovation in Neuroscience and Technology, Washington University in St. Louis, Missouri, USA; McKelvey School of Engineering, Washington University in St. Louis, St. Louis, Missouri, USA; Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri, USA.
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Zheng J, Li R, Zayed MA, Yan Y, An H, Hastings MK. Pilot study of contrast-free MRI reveals significantly impaired calf skeletal muscle perfusion in diabetes with incompressible peripheral arteries. Vasc Med 2021; 26:367-373. [PMID: 33749394 DOI: 10.1177/1358863x21996465] [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: 01/30/2023]
Abstract
Patients with diabetes mellitus (DM) are more likely to have densely calcified lesions in the below-the-knee tibial arteries. However, the relationship between peripheral arterial calcification and local skeletal muscle perfusion has not been explored. Thirty subjects were prospectively recruited into three groups in this pilot study: (1) Non-DM: 10 people without DM; (2) DM, ABI < 1.3: 10 people with DM and normal ankle-brachial index (ABI) (0.9-1.3); and (3) DM, ABI ⩾ 1.3: 10 people with DM and ABI ⩾ 1.3. All subjects underwent calf perfusion measurements at rest and during an isometric plantarflexion contraction exercise within the magnetic resonance imaging (MRI) system. The noncontrast MRI techniques were applied to quantitatively assess skeletal muscle blood flow (SMBF) and oxygen extraction fraction (SMOEF) in medial gastrocnemius and soleus muscles. Both SMBF and SMOEF reserves were calculated as the ratio of the exercise value to the resting value. Exercise SMBF and SMOEF values in the medial gastrocnemius muscle were lower in the two DM groups than in the non-DM group (p < 0.05). The SMBF reserve in medial gastrocnemius was significantly lower in the DM, ABI ⩾ 1.3 group compared to the DM, ABI < 1.3 group (p < 0.05). This study demonstrates that people with DM and calcified arteries had lower perfusion in gastrocnemius muscle compared to those without DM and those with DM and a normal ABI.
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Affiliation(s)
- Jie Zheng
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, MO, USA
| | - Ran Li
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, MO, USA
| | - Mohamed A Zayed
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St Louis, MO, USA
| | - Yan Yan
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St Louis, MO, USA
| | - Hongyu An
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, MO, USA
| | - Mary K Hastings
- Physical Therapy Program, Washington University School of Medicine, St Louis, MO, USA
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Abstract
The coronavirus disease-2019 (COVID-19) pandemic has rapidly spread across the world. The disease is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which first appeared in Wuhan, China in December, 2019. Ever increasing data is continuing to emerge about the impact of COVID-19 on cardiovascular tissue and other organ system. Clinical features associated with COVID-19 suggest that endothelial cell dysfunction and microvascular thrombosis are to a large extent contributing to resultant multi-organ complications. This review is aimed at highlighting the critical aspects associated with COVID-19 and its presumed microvascular angiopathic consequences on the cardiovascular system leading to multi-organ dysfunction.
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Affiliation(s)
- Margaret Nalugo
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States
| | - Linda J. Schulte
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States
| | - Muhammad F. Masood
- Division of Cardiothoracic Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States
| | - Mohamed A. Zayed
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States
- Division of Molecular Cell Biology, Washington University School of Medicine, St. Louis, MO, United States
- Department of Biomedical Engineering, McKelvey School of Engineering, Washington University, St. Louis, MO, United States
- Veterans Affairs St. Louis Health Care System, St. Louis, MO, United States
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Zayed MA, Jin X, Yang C, Belaygorod L, Engel C, Desai K, Harroun N, Saffaf O, Patterson BW, Hsu FF, Semenkovich CF. CEPT1-Mediated Phospholipogenesis Regulates Endothelial Cell Function and Ischemia-Induced Angiogenesis Through PPARα. Diabetes 2021; 70:549-561. [PMID: 33214136 PMCID: PMC7881870 DOI: 10.2337/db20-0635] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 11/12/2020] [Indexed: 11/13/2022]
Abstract
De novo phospholipogenesis, mediated by choline-ethanolamine phosphotransferase 1 (CEPT1), is essential for phospholipid activation of transcription factors such as peroxisome proliferator-activated receptor α (PPARα) in the liver. Fenofibrate, a PPARα agonist and lipid-lowering agent, decreases amputation incidence in patients with diabetes. Because we previously observed that CEPT1 is elevated in carotid plaque of patients with diabetes, we evaluated the role of CEPT1 in peripheral arteries and PPARα phosphorylation (Ser12). CEPT1 was found to be elevated in diseased lower-extremity arterial intima of individuals with peripheral arterial disease and diabetes. To evaluate the role of Cept1 in the endothelium, we engineered a conditional endothelial cell (EC)-specific deletion of Cept1 via induced VE-cadherin-CreERT2-mediated recombination (Cept1Lp/LpCre +). Cept1Lp/LpCre + ECs demonstrated decreased proliferation, migration, and tubule formation, and Cept1Lp/LpCre + mice had reduced perfusion and angiogenesis in ischemic hind limbs. Peripheral ischemic recovery and PPARα signaling were further compromised by streptozotocin-induced diabetes and ameliorated by feeding fenofibrate. Cept1 endoribonuclease-prepared siRNA decreased PPARα phosphorylation in ECs, which was rescued with fenofibrate but not PC16:0/18:1. Unlike Cept1Lp/LpCre + mice, Cept1Lp/LpCre + Ppara -/- mice did not demonstrate hind-paw perfusion recovery after feeding fenofibrate. Therefore, we demonstrate that CEPT1 is essential for EC function and tissue recovery after ischemia and that fenofibrate rescues CEPT1-mediated activation of PPARα.
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Affiliation(s)
- Mohamed A Zayed
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO
- VA St. Louis Health Care System, St. Louis, MO
| | - Xiaohua Jin
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO
| | - Chao Yang
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO
| | - Larisa Belaygorod
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO
| | - Connor Engel
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO
| | - Kshitij Desai
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO
| | - Nikolai Harroun
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO
| | - Omar Saffaf
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine in St. Louis, St. Louis, MO
| | - Bruce W Patterson
- Center for Human Nutrition, Department of Medicine, Washington University School of Medicine in St. Louis, St. Louis, MO
| | - Fong-Fu Hsu
- Division of Endocrinology, Metabolism and Lipid Research, Department of Medicine, Washington University School of Medicine in St. Louis, St. Louis, MO
| | - Clay F Semenkovich
- Division of Endocrinology, Metabolism and Lipid Research, Department of Medicine, Washington University School of Medicine in St. Louis, St. Louis, MO
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Moriarty JM, Rueda V, Liao M, Kim GHJ, Rochon PJ, Zayed MA, Lasorda D, Golowa YS, Shavelle DM, Dexter DJ. Endovascular Removal of Thrombus and Right Heart Masses Using the AngioVac System: Results of 234 Patients from the Prospective, Multicenter Registry of AngioVac Procedures in Detail (RAPID). J Vasc Interv Radiol 2021; 32:549-557.e3. [PMID: 33526346 DOI: 10.1016/j.jvir.2020.09.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 09/12/2020] [Accepted: 09/12/2020] [Indexed: 12/13/2022] Open
Abstract
PURPOSE To assess device and procedural safety and technical success associated with the use of the AngioVac System to remove vascular thrombi and cardiac masses. MATERIALS AND METHODS The Registry of AngioVac Procedures in Detail (RAPID) study prospectively collected data for 234 patients receiving treatment with AngioVac at 21 sites between March 2016 and August 2019: 84 (35.9%) with caval thromboemboli (CTEs), 113 (48.3%) with right heart masses (RHMs), 20 (8.5%) with catheter-related thrombi (CRTs), and 4 (1.7%) with pulmonary emboli (PEs). Thirteen patients had a combination of procedures during the same admission. RESULTS Using the AngioVac system, 70%-100% thrombus or mass removal was achieved in 73.6% of patients with CTEs, 58.5% of patients with RHMs, 60% of patients with CRTs, and 57.1% of patients with PEs. Extracorporeal bypass time was < 1 hour for 176 (75.2%) procedures. Estimated blood loss was < 250 mL for 179 procedures (76.5%). Mean hemoglobin decreased from 10.4 g/dL ± 2.9 preoperatively to 9.4 g/dL ± 2.6 postoperatively. Transfusions were administered in 59 procedures (25.2%) with 47 transfusions (78.2%) being ≤ 2 U. There were 36 procedure-related complications, including 1 death. CONCLUSIONS The RAPID registry data demonstrate that the AngioVac System can be safely and effectively used to remove vascular thrombi and cardiac masses across a broad range of patient populations. The limited use of the device to remove pulmonary emboli in the present series precludes recommending the use of the AngioVac device for this indication.
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Affiliation(s)
- John M Moriarty
- Division of Interventional Radiology, Department of Radiology, David Geffen School of Medicine at UCLA, Los Angeles, California.
| | - Victoria Rueda
- Division of Interventional Radiology, Department of Radiology, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Millie Liao
- Loma Linda University School of Medicine, Loma Linda, California
| | - Grace Hyun J Kim
- Department of Radiological Sciences, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Paul J Rochon
- Division of Interventional Radiology, Department of Radiology, University of Colorado School of Medicine, Aurora, Colorado
| | - Mohamed A Zayed
- Section of Vascular Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - David Lasorda
- Department of Cardiology, Allegheny General Hospital, Pittsburgh, Pennsylvania
| | - Yosef S Golowa
- Department of Vascular and Interventional Radiology, Montefiore Medical Center, New York, New York
| | - David M Shavelle
- Division of Cardiovascular Medicine, Keck School of Medicine at USC, Los Angeles, California
| | - David J Dexter
- Division of Vascular Surgery, Eastern Virginia Medical School, Norfolk, Virginia
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Ahmed MK, Zayed MA, El-Dek SI, Hady MA, El Sherbiny DH, Uskoković V. Nanofibrous ε-polycaprolactone scaffolds containing Ag-doped magnetite nanoparticles: Physicochemical characterization and biological testing for wound dressing applications in vitro and in vivo. Bioact Mater 2021; 6:2070-2088. [PMID: 33511308 PMCID: PMC7809176 DOI: 10.1016/j.bioactmat.2020.12.026] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [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: 09/28/2020] [Revised: 12/24/2020] [Accepted: 12/25/2020] [Indexed: 12/30/2022] Open
Abstract
Skin wounds can lead to numerous complications with dangerous health consequences. In this work, magnetite nanoparticles were doped with different concentrations of antimicrobial silver (Ag) ions and incorporated into the electrospun nanofibrous ε-polycaprolactone (PCL) scaffolds. Nanoparticles and scaffolds with various Ag contents were characterized using a range of physicochemical techniques. Ag entered magnetite as cations and preferentially positioned at tetrahedral sites, introducing lattice distortions and topographic irregularities. Amorphization of the structure due to accommodation of Ag expanded the lattice in the bulk and contracted it on the surface, where broadened distribution of Fe–O coordinations was detected. Promoting spin canting and diminishing the double exchange interaction through altered distribution of ferric and ferrous ions, Ag softened the magnetism of magnetite. By making the nanoparticle structure more defective, Ag modified the interface with the polymer and promoted the protrusion of the nanoparticles from the surface of the polymeric nanofibers, thus increasing their roughness and hydrophilicity, with positive repercussions on cell adhesion and growth. Both the viability of human melanocytes and the antibacterial activity against E. coli and S. aureus increased with the concentration of Ag in the magnetite phase of the scaffolds. Skin wound healing rate in rats also increased in direct proportion with the concentration of Ag in the magnetite phase, and no abnormalities in the dermal and epidermal tissues were visible on day 10 in the treatment group. These results imply an excellent potential of these composite nanofibrous scaffolds for use as wound dressings and in other reconstructive skin therapies. Electrospun nanofibrous polymeric wound dressings interspersed with magnetite nanoparticles doped with Ag ions were fabricated. Detailed physicochemical characterization is provided with aid of diffractometric, spectroscopic and microscopic techniques. Both the viability of melanocytes and the antibacterial activity increased with the addition of Ag ions. Skin wound healing rate in rats increased to 51 and 92 % on day 10 for dressings without and with Ag, respectively, relative to control. Animals treated with Ag-doped dressings displayed no atrophy of sebaceous glands and necrosis of hair follicles of control animals.
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Affiliation(s)
- M K Ahmed
- Faculty of Nanotechnology for Postgraduate studies, Cairo University, El‑Sheikh Zayed 12588, Egypt.,Department of Physics, Faculty of Science, Suez University, Suez 43518, Egypt
| | - M A Zayed
- Chemistry Department, Faculty of Science, Cairo University, 12613, Giza, Egypt
| | - S I El-Dek
- Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni Suef, Egypt
| | - Mayssa Abdel Hady
- Pharmaceutical Technology Department, National Research Centre, Dokii, Giza, Egypt
| | - Doaa H El Sherbiny
- Chemistry Department, Faculty of Science, Cairo University, 12613, Giza, Egypt.,Department of Biochemistry, Faculty of Dentistry, Modern University for Technology and Information, Mokattam, Cairo, Egypt
| | - Vuk Uskoković
- Advanced Materials and Nanobiotechnology Laboratory, TardigradeNano LLC, Irvine, CA, 92604, USA
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Cai M, Xie Y, Bowe B, Gibson AK, Zayed MA, Li T, Al-Aly Z. Temporal Trends in Incidence Rates of Lower Extremity Amputation and Associated Risk Factors Among Patients Using Veterans Health Administration Services From 2008 to 2018. JAMA Netw Open 2021; 4:e2033953. [PMID: 33481033 PMCID: PMC7823225 DOI: 10.1001/jamanetworkopen.2020.33953] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
IMPORTANCE Lower extremity amputation (LEA) is associated with significant morbidity and mortality. However, national temporal trends of LEA incidence rates among US veterans and associated factors have not been well characterized. OBJECTIVE To describe the temporal trends of LEA, characterize associated risk factors, and decompose the associations of these risk factors with changes in temporal trends of LEA among US veterans using Department of Veteran Affairs (VA) services between 2008 and 2018. DESIGN, SETTING, AND PARTICIPANTS This cohort study used VA data from 2008 to 2018 to estimate incidence rates of LEA among veterans using VA services. Cox regression models were used to identify risk factors associated with LEA. Decomposition analyses estimated the associations of changes in prevalence of risk factors with changes in LEA rates. Data were analyzed from October 1, 2007, to September 30, 2018. MAIN OUTCOMES AND MEASURES Toe, transmetatarsal, below-knee, or above-knee LEA. RESULTS A total of 6 493 141 veterans were included (median [interquartile range] age, 64 [54-76] years; 6 060 390 [93.4%] men). Veterans were studied for a median (interquartile range) of 10.9 (5.6-11.0) years. Between 2008 and 2018, rates of LEA increased from 12.89 (95% CI, 12.53-13.25) LEA per 10 000 persons to 18.12 (95% CI, 17.70-18.54) LEA per 10 000 persons, representing a net increase of 5.23 (95% CI, 4.68-5.78) LEA per 10 000 persons. Between 2008 and 2018, toe amputation rates increased by 3.24 (2.89-3.59) amputations per 10 000 persons, accounting for 62.0% of the total increase in LEA rates. Transmetatarsal amputations increased by 1.54 (95% CI, 1.27-1.81) amputations per 10 000 persons; below-knee amputation rates increased by 0.81 (95% CI, 0.56-1.05) amputations per 10 000 persons; and above-knee amputation rates decreased by 0.37 (95% CI, 0.14-0.59) amputations per 10 000 persons. Compared with men, women had decreased risk of any LEA (hazard ratio [HR], 0.34 [95% CI, 0.31-0.37]). Factors associated with increased risk of any LEA included Black race (HR, 1.25 [95% CI, 1.21-1.28]) or another non-White race (ie, Asian, Latino, or other; HR, 2.36 [95% CI, 2.30-2.42]), obesity (HR, 1.59 [95% CI, 1.55-1.63]), diabetes (HR, 6.38 [95% CI, 6.22-6.54]), chronic kidney disease (CKD; eg, CKD stage 5: HR, 3.94 [95% CI, 3.22-4.83]), and smoking status (eg, current smoking: HR, 1.97 [95% CI, 1.92-2.03]). Decomposition analyses suggested that while changes in demographic composition, primarily driven by increased proportion of women veterans, associated with a decrease of 0.18 (95% CI, 0.14-0.22) LEA per 10 000 persons, and decreases in smoking rates, associated with a decrease of 0.88 (95% CI, 0.79-0.97) LEA per 10 000 persons. However, these were overwhelmed by increased rates of diabetes, associated with an increase of 1.86 (95% CI, 1.72-1.99) LEA per 10 000 persons; peripheral arterial disease, associated with an increase of 1.53 (95% CI, 1.41-1.65) LEA per 10 000 persons; CKD, associated with an increase of 1.45 (95% CI, 1.33-1.57) LEA per 10 000 persons; and other clinical factors, including body mass index, cancer, cardiovascular disease, cerebrovascular disease, chronic lung disease, dementia, and hypertension, associated with an increase of 1.45 (95% CI, 1.33-1.57) LEA per 10 000 persons. CONCLUSIONS AND RELEVANCE This cohort study found that incidence rates of LEA among veterans using VA services increased between 2008 and 2018. Efforts aimed at reducing burden of LEA should target the reduction of diabetes, peripheral arterial disease, and CKD at the individual and population levels.
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Affiliation(s)
- Miao Cai
- Clinical Epidemiology Center, Department of Veterans Affairs, St Louis Health Care Systems, St Louis, Missouri
- Veterans Research and Education Foundation of St Louis, St Louis, Missouri
| | - Yan Xie
- Clinical Epidemiology Center, Department of Veterans Affairs, St Louis Health Care Systems, St Louis, Missouri
- Veterans Research and Education Foundation of St Louis, St Louis, Missouri
- Department of Epidemiology and Biostatistics, College for Public Health and Social Justice, St Louis University, St Louis, Missouri
| | - Benjamin Bowe
- Clinical Epidemiology Center, Department of Veterans Affairs, St Louis Health Care Systems, St Louis, Missouri
- Veterans Research and Education Foundation of St Louis, St Louis, Missouri
- Department of Epidemiology and Biostatistics, College for Public Health and Social Justice, St Louis University, St Louis, Missouri
| | - Andrew K. Gibson
- Clinical Epidemiology Center, Department of Veterans Affairs, St Louis Health Care Systems, St Louis, Missouri
| | - Mohamed A. Zayed
- Section of Vascular Surgery, Department of Surgery, School of Medicine, Washington University in St Louis, St Louis, Missouri
- Department of Surgery, Veterans Affairs St Louis Health Care System, St Louis, Missouri
| | - Tingting Li
- Clinical Epidemiology Center, Department of Veterans Affairs, St Louis Health Care Systems, St Louis, Missouri
- Division of Nephrology, School of Medicine, Washington University in St Louis, St Louis, Missouri
| | - Ziyad Al-Aly
- Clinical Epidemiology Center, Department of Veterans Affairs, St Louis Health Care Systems, St Louis, Missouri
- Veterans Research and Education Foundation of St Louis, St Louis, Missouri
- Department of Medicine, School of Medicine, Washington University in St Louis, St Louis, Missouri
- Nephrology Section, Medicine Service, Department of Veteran Affairs St Louis Health Care System, St Louis, Missouri
- Institute for Public Health, Washington University in St Louis, St Louis, Missouri
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Nalugo M, Cashin J, Jin X, Millman J, Remedi M, Engel C, Williams D, Lin Y, Zayed MA. Toward a Cure for Diabetes: Pancreatic Tissue Encapsulation and Implantation in a Novel Arteriovenous Graft. JVS Vasc Sci 2021. [DOI: 10.1016/j.jvssci.2021.09.017] [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: 11/30/2022] Open
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Abstract
There is a reported increased incidence of lower extremity amputations in individuals with diabetes who are treated with canagliflozin (an SGLT2 receptor inhibitor). It is unclear whether this is an unintended consequence of therapy, or whether canagliflozin can affect peripheral limb perfusion in the setting of underling arterial malperfusion. To evaluate this we explored the effect of canagliflozin on tissue recovery following unilateral hind-limb ischemia (HLI). Adult wildtype (+/+) and diabetic (db/db) mice were maintained on 8 weeks of a regular chow diet, or a chow diet containing canagliflozin (200 mg/kg). Following HLI, hind-limb appearance, function, and Doppler perfusion were serially evaluated. Gastrocnemius muscle fiber size and microvessel density were also evaluated 21 days following HLI. We observed that db/db that received a diet containing canagliflozin had significantly worse hind-limb function and appearance scores compared to both db/db mice that received a regular diet and +/+ mice that received a canagliflozin diet. At post-HLI day 21, db/db mice that received a canagliflozin diet also had decreased Doppler perfusion, gastrocnemius muscle fiber size, and microvessel density compared to +/+ mice that received a canagliflozin diet. These findings indicate that canagliflozin appears to impede ischemic peripheral tissue recovery and warrant further clinical investigation in individuals with diabetes and a history of peripheral artery disease.
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Affiliation(s)
- Margaret Nalugo
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St Louis, MO, USA
| | - Nikolai Harroun
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St Louis, MO, USA
| | - Chenglong Li
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St Louis, MO, USA
| | - Larisa Belaygorod
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St Louis, MO, USA
| | - Clay F Semenkovich
- Department of Medicine, Division of Endocrinology, Metabolism & Lipid Research, Washington University School of Medicine, St Louis, MO, USA
| | - Mohamed A Zayed
- Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St Louis, MO, USA.,Division of Molecular Cell Biology, Washington University School of Medicine, St Louis, MO, USA.,Department of Biomedical Engineering, Washington University, McKelvey School of Engineering, St Louis, MO, USA.,Veterans Affairs St Louis Health Care System, St Louis, MO, USA
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50
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Affiliation(s)
- Mohamed A Zayed
- Section of Vascular Surgery, Department of Surgery, and Division of Molecular Cell Biology, Washington University School of Medicine, St. Louis, MO. Department of Biomedical Engineering, Washington University, McKelvey School of Engineering, St. Louis, MO. Veterans Affairs St. Louis Health Care System, St. Louis, MO
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