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Zhu X, Peng C, Wu Z, Zhang X, Liu S, Luo Y, Yang L. Establishment of a rabbit model of different degrees of testicular torsion. Actas Urol Esp 2024:S2173-5786(24)00077-5. [PMID: 38885741 DOI: 10.1016/j.acuroe.2024.05.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2024] [Revised: 04/26/2024] [Accepted: 04/29/2024] [Indexed: 06/20/2024]
Abstract
INTRODUCTION AND OBJECTIVES Different degrees of testicular torsion result in varying degrees of testicular damage, which influences treatment options and outcomes. Therefore, establishing a testicular torsion model with different degrees is necessary for clinical diagnosis. MATERIALS AND METHODS Rabbits were randomly divided into four groups and their spermatic cords were twisted at 0 °, 180 °, 360 °, and 720 °, respectively. Color Doppler flow imaging (CDFI) were performed to evaluate the blood supply in testicles. The twisted testicles were surgically removed at six hours post-operation and were evaluated by morphological observation and Hematoxylin and Eosin staining. RESULTS CDFI signals were gradually decreased as the degree of testicular torsion increased, and scores of CDFI in the 360 ° and 720 ° groups were significantly decreased at postoperative six hours compared to pre-surgery. Compared to the sham, the testicle in the 180 ° group exhibited slight congestion, whereas the testicles in the 360 ° and 720 ° groups were dark red in color and had severe congestion and unrecognizable vessels. Hematoxylin and Eosin staining showed mild spermatogenic cell reduction and testicular interstitial hemorrhage in the 180 ° group. In the 360 ° and 720 ° groups, disordered seminiferous tubules, shed spermatogenic cells in tubules, inflammatory cell infiltration, and severe hemorrhage were found. In comparison with the sham, interstitial hemorrhage scores in the 360 ° and 720 ° groups were significantly higher, and scores of germinal epithelial cell thickness in the three testicular torsion groups were significantly decreased. CONCLUSIONS Collectively, we successfully constructed a testicular torsion model with different degrees in rabbits.
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Affiliation(s)
- X Zhu
- Departmento de Radiología, Hospital de China Occidental/Escuela de Medicina de China Occidental, Universidad de Sichuan, Sichuan, China
| | - C Peng
- Departmento de Radiología, Hospital de China Occidental/Escuela de Medicina de China Occidental, Universidad de Sichuan, Sichuan, China
| | - Z Wu
- Instituto de Patología Clínica, Laboratorio Clave de Ingeniería de Trasplantes e Inmunología, CNS, Hospital de China Occidental, Universidad de Sichuan, Sichuan, China
| | - X Zhang
- Departmento de Radiología, Hospital de China Occidental/Escuela de Medicina de China Occidental, Universidad de Sichuan, Sichuan, China
| | - S Liu
- Departmento de Radiología, Hospital de China Occidental/Escuela de Medicina de China Occidental, Universidad de Sichuan, Sichuan, China
| | - Y Luo
- Departmento de Radiología, Hospital de China Occidental/Escuela de Medicina de China Occidental, Universidad de Sichuan, Sichuan, China
| | - L Yang
- Departmento de Radiología, Hospital de China Occidental/Escuela de Medicina de China Occidental, Universidad de Sichuan, Sichuan, China.
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Akhigbe R, Odetayo A, Akhigbe T, Hamed M, Ashonibare P. Pathophysiology and management of testicular ischemia/reperfusion injury: Lessons from animal models. Heliyon 2024; 10:e27760. [PMID: 38694115 PMCID: PMC11058307 DOI: 10.1016/j.heliyon.2024.e27760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 02/24/2024] [Accepted: 03/06/2024] [Indexed: 05/03/2024] Open
Abstract
Testicular torsion is a urological emergency that involves the twisting of the spermatic cord along its course. Compelling pieces of evidence have implicated oxidative stress-sensitive signaling in pathogenesis of testicular I/R injury. Although, surgical detorsion is the mainstay management; blockade of the pathways involved in the pathogenesis may improve the surgical outcome. Experimental studies using various testicular I/R models have been reported in a bid to explore the mechanisms associated with testicular I/R and evaluate the benefits of potential therapeutic measures; however, most are limited by their shortcomings. Thus, this review was intended to describe the details of the available testicular I/R models as well as their merits and drawbacks, the pathophysiological basis and consequences of testicular I/R, and the pharmacological agents that have being proposed to confer testicular benefits against testicular I/R. This provides an understanding of the pathophysiological events and available models used in studying testicular I/R. In addition, this research provides evidence-based molecules with therapeutic potentials as well as their mechanisms of action in testicular I/R.
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Affiliation(s)
- R.E. Akhigbe
- Department of Physiology, Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria
- Reproductive Biology and Toxicology Research Laboratory, Oasis of Grace Hospital, Osogbo, Osun State, Nigeria
| | - A.F. Odetayo
- Reproductive Biology and Toxicology Research Laboratory, Oasis of Grace Hospital, Osogbo, Osun State, Nigeria
- Department of Physiology, University of Ilorin, Ilorin, Kwara State, Nigeria
| | - T.M. Akhigbe
- Reproductive Biology and Toxicology Research Laboratory, Oasis of Grace Hospital, Osogbo, Osun State, Nigeria
- Breeding and Plant Genetics Unit, Department of Agronomy, Osun State University, Osun State, Nigeria
| | - M.A. Hamed
- Reproductive Biology and Toxicology Research Laboratory, Oasis of Grace Hospital, Osogbo, Osun State, Nigeria
- Department of Medical Laboratory Science, Afe Babalola University, Ado-Ekiti, Ekiti State, Nigeria
- The Brainwill Laboratory, Osogbo, Osun State, Nigeria
| | - P.J. Ashonibare
- Department of Physiology, Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria
- Reproductive Biology and Toxicology Research Laboratory, Oasis of Grace Hospital, Osogbo, Osun State, Nigeria
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Cakmak YO, Khwaounjoo P, Pangilinan J, Wise IK, Burrows C, Kolakshyapati P, Williams Z, Bannon P. Decreasing the blood flow of non-compressible intra-abdominal organs with non-invasive transcutaneous electrical stimulation. Sci Rep 2024; 14:10122. [PMID: 38698055 PMCID: PMC11066058 DOI: 10.1038/s41598-024-55165-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 02/21/2024] [Indexed: 05/05/2024] Open
Abstract
Non-invasive neuromodulation of non-compressible internal organs has significant potential for internal organ bleeding and blood-shift in aero/space medicine. The present study aims to investigate the potential influences of the non-invasive transcutaneous electrical nerve stimulation (TENS) on multiple non-compressible internal organs' blood flow. Porcine animal model (n = 8) was randomized for a total of 48 neuromodulation sessions with two different TENS stimulation frequencies (80 Hz, 10 Hz) and a placebo stimulation. A combination of two different electrode configurations (Abdominal-only or Abdominal and hind limb) were also performed. Intraarterial blood flow measurements were taken during pre and post-stimulation periods at the left renal artery, common hepatic artery, and left coronary artery. Intracranial, and extracranial arterial blood flows were also assessed with digital subtraction angiography. TENS with abdominal-only electrode configurations at 10 Hz demonstrated significant reductions in average peak blood flow velocity (APV) of the common hepatic artery (p = 0.0233) and renal arteries (p = 0.0493). Arterial pressures (p = 0.0221) were also significantly lower when renal APV was reduced. The outcome of the present study emphasises the potential use of TENS in decreasing the blood flow of non-compressible internal organs when the correct combination of electrodes configuration and frequency is used.
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Affiliation(s)
- Yusuf O Cakmak
- Point-of-Care Technologies Theme, Centre for Bioengineering and Nanotechnology, Dunedin, New Zealand.
- Interventional Technologies Theme, Medical Technologies Centre of Research Excellence, Auckland, New Zealand.
- Centre for Health Systems and Technologies, University of Otago, Dunedin, New Zealand.
- Brain Health Research Centre, University of Otago, Dunedin, New Zealand.
- Cakmak Lab, Department of Anatomy, School of Biomedical Sciences, University of Otago, PO BOX 56, Dunedin, 9054, New Zealand.
| | - Prashanna Khwaounjoo
- Cakmak Lab, Department of Anatomy, School of Biomedical Sciences, University of Otago, PO BOX 56, Dunedin, 9054, New Zealand
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Joseph Pangilinan
- Cakmak Lab, Department of Anatomy, School of Biomedical Sciences, University of Otago, PO BOX 56, Dunedin, 9054, New Zealand
| | - Innes K Wise
- Hybrid Theatre, Charles Perkins Centre, The University of Sydney, Sydney, Australia
| | - Chris Burrows
- Hybrid Theatre, Charles Perkins Centre, The University of Sydney, Sydney, Australia
| | | | - Zoe Williams
- Hybrid Theatre, Charles Perkins Centre, The University of Sydney, Sydney, Australia
| | - Paul Bannon
- Hybrid Theatre, Charles Perkins Centre, The University of Sydney, Sydney, Australia
- Cardiovascular Surgery, Sydney Medical School, Sydney, Australia
- The Baird Institute of Applied Heart & Lung Surgical Research, Sydney, Australia
- Department of Cardiothoracic Surgery, Royal Prince Alfred Hospital, Sydney, Australia
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Zimmerman LL, Mentzelopoulos G, Parrish H, Marcu VI, Luma BD, Becker JB, Bruns TM. Immediate and Long-Term Effects of Tibial Nerve Stimulation on the Sexual Behavior of Female Rats. Neuromodulation 2024; 27:343-352. [PMID: 36609088 DOI: 10.1016/j.neurom.2022.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 11/07/2022] [Accepted: 11/08/2022] [Indexed: 01/06/2023]
Abstract
OBJECTIVES There are limited treatment options for female sexual dysfunction (FSD). Percutaneous tibial nerve stimulation (PTNS) has shown improvements in FSD symptoms in neuromodulation clinical studies, but the direct effects on sexual function are not understood. This study evaluated the immediate and long-term effects of PTNS on sexual motivation and receptivity in a rat model of menopausal women. Our primary hypothesis was that long-term PTNS would yield greater changes in sexual behavior than short-term stimulation. MATERIALS AND METHODS In two experiments, after receiving treatment, we placed ovariectomized female rats in an operant chamber in which the female controls access to a male by nose poking. We used five treatment conditions, which were with or without PTNS and no, partial, or full hormone priming. In experiment 1, we rotated rats through each condition twice with behavioral testing immediately following treatment for ten weeks. In experiment 2, we committed rats to one condition for six weeks and tracked sexual behavior over time. We quantified sexual motivation and sexual receptivity with standard measures. RESULTS No primary comparisons were significant in this study. In experiment 1, we observed increased sexual motivation but not receptivity immediately following PTNS with partial hormone priming, as compared with priming without PTNS (linear mixed effect models; initial latency [p = 0.34], inter-interval latency [p = 0.77], nose poke frequency [p = 0.084]; eight rats). In experiment 2, we observed trends of increased sexual receptivity (linear correlation for weekly group means; mounts [p = 0.094 for trendline], intromissions [p = 0.073], lordosis quotient [p = 0.58], percent time spent with a male [p = 0.39], decreased percent time alone [p = 0.024]; four rats per condition), and some sexual motivation metrics (linear correlation for weekly group means; nose pokes per interval [p = 0.050], nose poke frequency [p = 0.039], decreased initial latency [p = 0.11]; four rats per condition) when PTNS was applied long-term with partial hormone priming, as compared with hormone-primed rats without stimulation. CONCLUSIONS PTNS combined with hormone priming shows potential for increasing sexual motivation in the short-term and sexual receptivity in the long-term in rats. Further studies are needed to examine variability in rat behavior and to investigate PTNS as a treatment for FSD in menopausal women.
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Affiliation(s)
- Lauren L Zimmerman
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA; Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
| | - Georgios Mentzelopoulos
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA; Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA; Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI, USA
| | - Hannah Parrish
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA; Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI, USA
| | - Vlad I Marcu
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA; Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI, USA; Department of Engineering Physics, University of Michigan, Ann Arbor, MI, USA
| | - Brandon D Luma
- Michigan Neuroscience Institute, University of Michigan, Ann Arbor, MI, USA
| | - Jill B Becker
- Michigan Neuroscience Institute, University of Michigan, Ann Arbor, MI, USA; Department of Psychology, University of Michigan, Ann Arbor, MI, USA
| | - Tim M Bruns
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA; Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA.
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Keskin S, Keskin DD, Değermenci M, Hancı H, Karabekir NG, Atak M, Baş O. The Effectiveness of Electro-acupuncture in Ovarian Ischemia Reperfusion Injury. ACUPUNCTURE ELECTRO 2021. [DOI: 10.3727/036012921x16264625521781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Electro-acupuncture is widely used in gynecology. Adnexal torsion is an important threat to ovarian reserves in women of reproductive age. This is the first study to investigate whether electro-acupuncture is beneficial in protecting ovarian reserves in case of adnexal torsion resulting
in reperfusion injury. Thirty-two female Wistar Albino rats were randomized into four groups: the first group — sham operation, the second group — torsion/detorsion model, the third group — pre-acupunture + torsion/detorsion + post-acupuncture, and the fourth group —
torsion/detorsion + post-acupuncture. The acupoints used were CV4 and bilateral SP6, Ex-CA1, Kid3, and ST36. In the third group, the acupoints were needled for two weeks before torsion, continuing for a further two weeks after torsion. In the fourth group, needling began after torsion and
was maintained for two weeks. Both histological and biochemical parameters indicating ovarian reserves showed that electro-acupuncture applied to the above points exhibited an ameliorating effect on ovaries injured during ischemia/reperfusion. Electro-acupuncture may be capable of protecting
against and preventing ischemia/reperfusion injury in case of ovarian torsion.
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Jia W, Wang C, Yin Y. Acupuncture for oligospermia and asthenozoospermia: A systematic review and meta-analysis. Medicine (Baltimore) 2021; 100:e27816. [PMID: 35049183 PMCID: PMC9191280 DOI: 10.1097/md.0000000000027816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 10/29/2021] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Acupuncture is widely used for oligospermia and asthenozoospermia in China, but its effect is unclear. We aimed to determine the effectiveness and safety of acupuncture in treating oligospermia and asthenozoospermia. METHODS An electronic search for randomized controlled trials evaluating acupuncture treatment in patients with oligospermia and asthenozoospermia published from database inception to October 2018 was conducted in PubMed, EMBASE, the Chinese Biomedical Literature Database, the Chinese Scientific Journal Database (VIP Database), the Wan-Fang Database, the China National Knowledge Infrastructure and the Cochrane Library. We established search terms related to 3 areas (oligospermia, asthenozoospermia, and acupuncture). Two authors independently screened all identified citations and extracted the data. The methodological quality of the included trials was assessed using the Cochrane criteria. RESULTS Seven studies with a total of 527 subjects were screened according to inclusion and exclusion standards, and most of the studies had significant methodological weaknesses. Seven randomized controlled trials tested the effects of acupuncture compared with placebo acupuncture and conventional medications in patients with oligospermia and asthenozoospermia. The results of this study suggest that acupuncture alone has no clear superiority in improving sperm motility (standard mean difference [SMD] = 1.13, 95% confidence interval [CI]: -0.64 to 2.89), the sperm concentration (SMD = 0.32, 95% CI: 0.27-0.92) or semen volume compared with placebo acupuncture. No significant difference was found between acupuncture alone and conventional medications in improving sperm motility (SMD = -0.53, 95% CI: -2.54 to 1.48), the sperm concentration (SMD = -1.10, 95% CI: -1.48 to -0.72) or semen volume. However, adjuvant acupuncture may enhance the effect of medications on improving sperm motility (SMD = 4.10, 95% CI: 1.09-7.12) and the sperm concentration (SMD = 1.07, 95% CI: 0.739-1.40), but the study heterogeneity was too high to establish robust conclusions. CONCLUSION These results suggest that the current evidence does not support acupuncture as an effective treatment for oligospermia and asthenozoospermia; therefore, acupuncture is not currently recommended as a treatment for these conditions. However, owing to the high risk of bias among the included studies, the evidence is limited, and more large-scale, high-quality clinical trials are needed in the future. TRIAL REGISTRATION NUMBER PROSPERO CRD42018083885.
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Li HL, Ding H, Yin XZ, Chen ZH, Tang B, Sun JY, Hu XH, Lv X, Kang ST, Fan YS, Wu T, Zhao SF, Xiao B, Zhang MQ. Comparison of high-resolution synchrotron-radiation-based phase-contrast imaging and absorption-contrast imaging for evaluating microstructure of vascular networks in rat brain: from 2D to 3D views. JOURNAL OF SYNCHROTRON RADIATION 2019; 26:2024-2032. [PMID: 31721747 DOI: 10.1107/s1600577519011688] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Accepted: 08/21/2019] [Indexed: 06/10/2023]
Abstract
Conventional imaging methods such as magnetic resonance imaging, computed tomography and digital subtraction angiography have limited temporospatial resolutions and shortcomings like invasive angiography, potential allergy to contrast agents, and image deformation, that restrict their application in high-resolution visualization of the structure of microvessels. In this study, through comparing synchrotron radiation (SR) absorption-contrast imaging to absorption phase-contrast imaging, it was found that SR-based phase-contrast imaging could provide more detailed ultra-high-pixel images of microvascular networks than absorption phase-contrast imaging. Simultaneously, SR-based phase-contrast imaging was used to perform high-quality, multi-dimensional and multi-scale imaging of rat brain angioarchitecture. With the aid of image post-processing, high-pixel-size two-dimensional virtual slices can be obtained without sectioning. The distribution of blood supply is in accordance with the results of traditional tissue staining. Three-dimensional anatomical maps of cerebral angioarchitecture can also be acquired. Functional partitions of regions of interest are reproduced in the reconstructed rat cerebral vascular networks. Imaging analysis of the same sample can also be displayed simultaneously in two- and three-dimensional views, which provides abundant anatomical information together with parenchyma and vessels. In conclusion, SR-based phase-contrast imaging holds great promise for visualizing microstructure of microvascular networks in two- and three-dimensional perspectives during the development of neurovascular diseases.
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Affiliation(s)
- Hong Lei Li
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, People's Republic of China
| | - Hui Ding
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, People's Republic of China
| | - Xian Zhen Yin
- State Key Laboratory of Drug Research, CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China
| | - Zhuo Hui Chen
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, People's Republic of China
| | - Bin Tang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, People's Republic of China
| | - Jing Yan Sun
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, People's Republic of China
| | - Xin Hang Hu
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, People's Republic of China
| | - Xinyi Lv
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, People's Republic of China
| | - Shun Tong Kang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, People's Republic of China
| | - Yi Shu Fan
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, People's Republic of China
| | - Tong Wu
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, People's Republic of China
| | - Song Feng Zhao
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, People's Republic of China
| | - Bo Xiao
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, People's Republic of China
| | - Meng Qi Zhang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, People's Republic of China
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Dynamic Detection of Thrombolysis in Embolic Stroke Rats by Synchrotron Radiation Angiography. Transl Stroke Res 2019; 10:695-704. [PMID: 30680639 DOI: 10.1007/s12975-019-0687-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 11/30/2018] [Accepted: 01/03/2019] [Indexed: 12/20/2022]
Abstract
A rodent model of embolic middle cerebral artery occlusion is used to mimic cerebral embolism in clinical patients. Thrombolytic therapy is the effective treatment for this ischemic injury. However, it is difficult to detect thrombolysis dynamically in living animals. Synchrotron radiation angiography may provide a novel approach to directly monitor the thrombolytic process and assess collateral circulation after embolic stroke. Thirty-six adult Sprague-Dawley rats underwent the embolic stroke model procedure and were then treated with tissue plasminogen activator. The angiographic images were obtained in vivo by synchrotron radiation angiography. Synchrotron radiation angiography confirmed the successful establishment of occlusion and detected the thrombolysis process after the thrombolytic treatment. The time of thrombolytic recanalization was unstable during embolic stroke. The infarct volume increased as the recanalization time was delayed from 2 to 6 h (p < 0.05). The collateral circulation of the internal carotid artery to the ophthalmic artery, the olfactory artery to the ophthalmic artery, and the posterior cerebral artery to the middle cerebral artery opened after embolic stroke and manifested different opening rates (59%, 24%, and 75%, respectively) in the rats. The opening of the collateral circulation from the posterior cerebral artery to the middle cerebral artery alleviated infarction in rats with successful thrombolysis (p < 0.05). The cerebral vessels of the circle of Willis narrowed after thrombolysis (p < 0.05). Synchrotron radiation angiography provided a unique tool to dynamically detect and assess the thrombolysis process and the collateral circulation during thrombolytic therapy.
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9
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Haemodynamic Recovery Properties of the Torsioned Testicular Artery Lumen. Sci Rep 2017; 7:15570. [PMID: 29138449 PMCID: PMC5686114 DOI: 10.1038/s41598-017-15680-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 10/31/2017] [Indexed: 11/08/2022] Open
Abstract
Testicular artery torsion (twisting) is one such severe vascular condition that leads spermatic cord injury. In this study, we investigate the recovery response of a torsioned ram testicular artery in an isolated organ-culture flow loop with clinically relevant twisting modes (90°, 180°, 270° and 360° angles). Quantitative optical coherence tomography technique was employed to track changes in the lumen diameter, wall thickness and the three-dimensional shape of the vessel in the physiological pressure range (10-50 mmHg). As a control, pressure-flow characteristics of the untwisted arteries were studied when subjected to augmented blood flow conditions with physiological flow rates up to 36 ml/min. Both twist and C-shaped buckling modes were observed. Acute increase in pressure levels opened the narrowed lumen of the twisted arteries noninvasively at all twist angles (at ∼22 mmHg and ∼35 mmHg for 360°-twisted vessels during static and dynamic flow experiments, respectively). The association between the twist-opening flow rate and the vessel diameter was greatly influenced by the initial twist angle. The biomechanical characteristics of the normal (untwisted) and torsioned testicular arteries supported the utilization of blood flow augmentation as an effective therapeutic approach to modulate the vessel lumen and recover organ reperfusion.
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10
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Wang L, Mu Z, Lin X, Geng J, Xiao TQ, Zhang Z, Wang Y, Guan Y, Yang GY. Simultaneous Imaging of Cerebrovascular Structure and Function in Hypertensive Rats Using Synchrotron Radiation Angiography. Front Aging Neurosci 2017; 9:359. [PMID: 29163140 PMCID: PMC5673661 DOI: 10.3389/fnagi.2017.00359] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 10/19/2017] [Indexed: 12/12/2022] Open
Abstract
Hypertension has a profound influence on the structure and function of blood vessels. Cerebral vessels undergo both structural and functional changes in hypertensive animals. However, dynamic changes of cerebrovasculature and the factors involved in this process are largely unknown. In this study, we explored the dynamic changes of vascular structure in hypertensive rats using novel synchrotron radiation angiography. Twenty-four spontaneously hypertensive rats (SHR) and 24 Sprague–Dawley (SD) rats underwent synchrotron radiation (SR) angiography. Each group had 8 animals. We studied the cerebral vascular changes in SHR over a time period of 3–12-month and performed quantitative analysis. No vascular morphology differences between SHR and SD rats were observed in the early stage of hypertension. The number of twisted blood vessels in the front brain significantly increased at the 9- and 12-month observation time-points in the SHR compared to the SD rats (p < 0.01). The vessel density of the cortex and the striatum in SHR was consistently higher than that in SD rats at time points of 3-, 9-, and 12-month (p < 0.001). Vascular elasticity decreased both in SHR and SD rats with aging. There were statistically significant differences in the relative vascular elasticity of extracranial/intracranial internal carotid artery, middle cerebral artery, posterior cerebral artery and anterior cerebral artery between SHR and SD rats at 12-month (p < 0.01). We concluded that the dynamic vascular alterations detected by SR angiography provided novel imaging data for the study of hypertension in vivo. The longer the course of hypertension was, the more obvious the vascular differences between the SHR and the SD rats became.
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Affiliation(s)
- Liping Wang
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Zhihao Mu
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.,Department of Pathology and Pathophysiology, Faculty of Basic Medical Sciences, Kunming Medical University, Kunming, China
| | - Xiaojie Lin
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Jieli Geng
- Department of Neurology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ti Qiao Xiao
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, CAS, Shanghai, China
| | - Zhijun Zhang
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yongting Wang
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yongjing Guan
- Department of Radiology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Guo-Yuan Yang
- Department of Neurology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
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11
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Fehér ÁM, Bajory Z. A review of main controversial aspects of acute testicular torsion. JOURNAL OF ACUTE DISEASE 2016. [DOI: 10.1016/j.joad.2015.06.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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12
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Zhu J, Chen Z, Zhu L, Meng Z, Wu G, Tian Z. Arginine Vasopressin and Arginine Vasopressin Receptor 1b Involved in Electroacupuncture-Attenuated Hypothalamic-Pituitary-Adrenal Axis Hyperactivity in Hepatectomy Rats. Neuromodulation 2015; 19:498-506. [PMID: 26573696 PMCID: PMC5063097 DOI: 10.1111/ner.12366] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 08/21/2015] [Accepted: 09/15/2015] [Indexed: 12/11/2022]
Abstract
Objective The study aims to know the effect of electroacupuncture (EA) in maintenance of the homeostasis of the neuroendocrine system in hepatectomy rats and the involvement of arginine vasopressin (AVP) signaling in hypothalamus after EA was observed. Materials and Methods Rats were randomly assigned to four groups, including the intact group, model group, sham‐EA group, and EA group. EA was given during the perioperative period at the Zusanli (ST36) and Sanyinjiao (SP6) points after hepatectomy. The serum adrenocorticotropic hormone (ACTH) and corticosterone (CORT) levels were detected via radioimmunoassay. The expression of AVP, arginine vasopressin receptor 1a (AVPR1a), arginine vasopressin receptor 1b (AVPR1b), and glucocorticoid receptor (GR) was detected by Western blot after surgery. Results Compared with the intact group, the ACTH and CORT levels in the serum of model group were increased, whereas the ACTH and CORT levels were decreased in the EA group compared with the model group. Moreover, AVP and AVPR1b protein levels in the pituitary gland were increased in the model group and decreased in the EA group. Further, a distinct increase in the AVP and AVPR1a protein levels was observed in the model group, whereas they were significantly decreased in the EA group. Blockade of AVPR1b by nelivaptan reduced the increase of ACTH and CORT. D [Leu4, Lys8] vasopressin can inhibit the effect of EA in rectification of the hyperactivity of the hypothalamic‐pituitary‐adrenal (HPA) axis. Conclusions EA application at ST36 and SP6 can ameliorate the hyperactivity of the HPA axis via AVP signaling during the perioperative period.
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Affiliation(s)
- Jing Zhu
- Department of Integrative Medicine and Neurobiology, State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, Institute of Acupuncture Research, WHO Collaborating Centre for Traditional Medicine, Fudan University, Shanghai, China
| | - Zhejun Chen
- Department of Integrative Medicine and Neurobiology, State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, Institute of Acupuncture Research, WHO Collaborating Centre for Traditional Medicine, Fudan University, Shanghai, China
| | - LiTing Zhu
- Department of Integrative Medicine and Neurobiology, State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, Institute of Acupuncture Research, WHO Collaborating Centre for Traditional Medicine, Fudan University, Shanghai, China
| | - ZeHui Meng
- Department of Integrative Medicine and Neurobiology, State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, Institute of Acupuncture Research, WHO Collaborating Centre for Traditional Medicine, Fudan University, Shanghai, China
| | - GenCheng Wu
- Department of Integrative Medicine and Neurobiology, State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, Institute of Acupuncture Research, WHO Collaborating Centre for Traditional Medicine, Fudan University, Shanghai, China
| | - ZhanZhuang Tian
- Department of Integrative Medicine and Neurobiology, State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, Institute of Acupuncture Research, WHO Collaborating Centre for Traditional Medicine, Fudan University, Shanghai, China
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