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Kim SE, Jeong SI, Shim KM, Jang K, Park JS, Lim YM, Kang SS. In Vivo Evaluation of Gamma-Irradiated and Heparin-Immobilized Small-Diameter Polycaprolactone Vascular Grafts with VEGF in Aged Rats. Polymers (Basel) 2022; 14:polym14061265. [PMID: 35335595 PMCID: PMC8955708 DOI: 10.3390/polym14061265] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 03/14/2022] [Accepted: 03/15/2022] [Indexed: 01/19/2023] Open
Abstract
The effectiveness of small-diameter vascular grafts depends on their antithrombogenic properties and ability to undergo accelerated endothelialization. The extreme hydrophobic nature of poly(ε-caprolactone) (PCL) hinders vascular tissue integration, limiting its use in medical implants. To enhance the antithrombogenicity of PCL as a biomaterial, we grafted 2-aminoethyl methacrylate (AEMA) hydrochloride onto the PCL surface using gamma irradiation; developed a biodegradable heparin-immobilized PCL nanofibrous scaffold using gamma irradiation and N-(3-dimethylaminopropyl)-N′-ethyl carbodiimide hydrochloride/N-hydroxysuccinimide reaction chemistry; and incorporated vascular endothelial growth factor (VEGF) into the scaffold to promote vascular endothelial cell proliferation and prevent thrombosis on the vascular grafts. We assessed the physicochemical properties of PCL, heparin-AEMA-PCL (H-PCL), and VEGF-loaded heparin-AEMA-PCL (VH-PCL) vascular grafts using scanning electron microscopy, attenuated total reflection–Fourier transform infrared spectroscopy, toluidine blue O staining, and fibrinogen adsorption and surface wettability measurement. In addition, we implanted the vascular grafts into 24-month-old Sprague Dawley rats and evaluated them for 3 months. The H-PCL and VH-PCL vascular grafts improved the recovery of blood vessel function by promoting the proliferation of endothelial cells and preventing thrombosis in clinical and histological evaluation, indicating their potential to serve as functional vascular grafts in vascular tissue engineering.
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Affiliation(s)
- Se-Eun Kim
- BK21 FOUR Program, Department of Veterinary Surgery, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea; (S.-E.K.); (K.-M.S.); (K.J.)
- Biomaterial R&BD Center, Chonnam National University, Gwangju 61186, Korea
| | - Sung-In Jeong
- Advanced Radiation Technology, Korea Atomic Energy Research Institute, Jeongeup-si 56212, Korea; (S.-I.J.); (J.-S.P.)
| | - Kyung-Mi Shim
- BK21 FOUR Program, Department of Veterinary Surgery, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea; (S.-E.K.); (K.-M.S.); (K.J.)
- Biomaterial R&BD Center, Chonnam National University, Gwangju 61186, Korea
| | - Kwangsik Jang
- BK21 FOUR Program, Department of Veterinary Surgery, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea; (S.-E.K.); (K.-M.S.); (K.J.)
- Biomaterial R&BD Center, Chonnam National University, Gwangju 61186, Korea
| | - Jong-Seok Park
- Advanced Radiation Technology, Korea Atomic Energy Research Institute, Jeongeup-si 56212, Korea; (S.-I.J.); (J.-S.P.)
| | - Youn-Mook Lim
- Advanced Radiation Technology, Korea Atomic Energy Research Institute, Jeongeup-si 56212, Korea; (S.-I.J.); (J.-S.P.)
- Correspondence: (Y.-M.L.); (S.-S.K.); Tel.: +82-63-570-3065 (Y.-M.L.); +82-62-530-2877 (S.S.K.)
| | - Seong-Soo Kang
- BK21 FOUR Program, Department of Veterinary Surgery, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea; (S.-E.K.); (K.-M.S.); (K.J.)
- Biomaterial R&BD Center, Chonnam National University, Gwangju 61186, Korea
- Correspondence: (Y.-M.L.); (S.-S.K.); Tel.: +82-63-570-3065 (Y.-M.L.); +82-62-530-2877 (S.S.K.)
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El-Domiaty HF, El-Roghy ES, Salem HR. Combination of magnesium supplementation with treadmill exercise improves memory deficit in aged rats by enhancing hippocampal neurogenesis and plasticity: a functional and histological study. Appl Physiol Nutr Metab 2022; 47:296-308. [PMID: 35225658 DOI: 10.1139/apnm-2021-0133] [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: 11/22/2022]
Abstract
This study aimed to investigate the possible ameliorative effects of co-supplementation with Mg2+ and treadmill exercise on memory deficit in aged rats. Fifty male albino rats (10 young and 40 aged rats) were divided into 5 groups (10 rats/group): young, aged sedentary, aged exercised, aged Mg2+-supplemented, and aged exercised and Mg2+-supplemented. Memory was assessed using the Y-maze and novel object recognition tests. Plasma samples were collected for measurement of C-reactive protein (CRP). Subsequently, brain malondialdehyde and catalase levels were measured. Histological and immunohistochemical analyses of the hippocampi were performed. Our results showed impaired memory in aged sedentary rats, with significantly elevated plasma CRP and brain malondialdehyde levels and decreased brain catalase. The hippocampus of aged sedentary rats showed cellular degeneration, downregulation of synaptophysin (SYP) and proliferating cell nuclear antigen (PCNA), and upregulation of glial fibrillary acidic protein (GFAP) and caspase-3. Mg2+ supplementation and/or treadmill exercise significantly improved memory tests in aged rats, which could be explained by the upregulation of hippocampal SYP and PCNA expression and downregulation of GFAP and caspase-3 expression with antioxidant and anti-inflammatory mechanisms. The combined therapy had a better effect than both treatments alone, confirming the role of Mg2+ supplementation with physical exercise in enhancing age-related memory deficit. Novelty: Magnesium supplementation with treadmill exercise improves memory deficit in aged rats. The possible mechanisms are upregulation of the hippocampal synaptophysin and PCNA, downregulation of GFAP and caspase-3, the antioxidant and anti-inflammatory mechanisms.
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Affiliation(s)
- Heba Fathy El-Domiaty
- Medical Physiology Department, Faculty of Medicine, Menoufia University, Shebin El-Kom, Menoufia Governorate, Egypt
| | - Eman S El-Roghy
- Histology Department, Faculty of Medicine, Menoufia University, Shebin El-Kom, Menoufia Governorate, Egypt
| | - Heba Rady Salem
- Medical Physiology Department, Faculty of Medicine, Menoufia University, Shebin El-Kom, Menoufia Governorate, Egypt
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Chen TY, Chen YL, Chiu WC, Yeh CL, Tung YT, Shirakawa H, Liao WT, Yang SC. Effects of the Water Extract of Fermented Rice Bran on Liver Damage and Intestinal Injury in Aged Rats with High-Fat Diet Feeding. Plants (Basel) 2022; 11:plants11050607. [PMID: 35270077 PMCID: PMC8912322 DOI: 10.3390/plants11050607] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 02/16/2022] [Accepted: 02/18/2022] [Indexed: 05/11/2023]
Abstract
The purpose of this study was to investigate the protective effects of the water extract of fermented rice bran (FRB) on liver damage and intestinal injury in old rats fed a high-fat (HF) diet. Rice bran (RB) was fermented with Aspergillus kawachii, and FRB was produced based on a previous study. Male Sprague Dawley rats at 36 weeks of age were allowed free access to a standard rodent diet and water for 8 weeks of acclimation then randomly divided into four groups (six rats/group), including a normal control (NC) group (normal diet), HF group (HF diet; 60% of total calories from fat), HF + 1% FRB group (HF diet + 1% FRB w/w), and HF + 5% FRB group (HF diet + 5% FRB w/w). It was found that the antioxidant ability of FRB was significantly increased when compared to RB. After 8 weeks of feeding, the HF group exhibited liver damage including an increased non-alcoholic fatty liver disease score (hepatic steatosis and inflammation) and higher interleukin (IL)-1β levels, while these were attenuated in the FRB-treated groups. Elevated plasma leptin levels were also found in the HF group, but the level was down-regulated by FRB treatment. An altered gut microbiotic composition was observed in the HF group, while beneficial bacteria including of the Lactobacillaceae and Lachnospiraceae had increased after FRB supplementation. In conclusion, it was found that FRB had higher anti-oxidative ability and showed the potential for preventing liver damage induced by a HF diet, which might be achieved through regulating imbalanced adipokines and maintaining a healthier microbiotic composition.
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Affiliation(s)
- Ting-Yu Chen
- Graduate Institute of Metabolism and Obesity Sciences, Taipei Medical University, Taipei 11031, Taiwan;
| | - Ya-Ling Chen
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 11031, Taiwan; (Y.-L.C.); (W.-C.C.); (C.-L.Y.)
| | - Wan-Chun Chiu
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 11031, Taiwan; (Y.-L.C.); (W.-C.C.); (C.-L.Y.)
| | - Chiu-Li Yeh
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 11031, Taiwan; (Y.-L.C.); (W.-C.C.); (C.-L.Y.)
| | - Yu-Tang Tung
- Graduate Institute of Biotechnology, National Chung Hsing University, Taichung 40227, Taiwan;
| | - Hitoshi Shirakawa
- Laboratory of Nutrition, Graduate School of Agricultural Science, Tohoku University, Sendai 980-8857, Japan;
| | - Wei-Tzu Liao
- Chian-E Biomedical Technology Corporation, Taipei 11031, Taiwan;
| | - Suh-Ching Yang
- Graduate Institute of Metabolism and Obesity Sciences, Taipei Medical University, Taipei 11031, Taiwan;
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei 11031, Taiwan; (Y.-L.C.); (W.-C.C.); (C.-L.Y.)
- Research Center of Geriatric Nutrition, College of Nutrition, Taipei Medical University, Taipei 11031, Taiwan
- Nutrition Research Center, Taipei Medical University Hospital, Taipei 11031, Taiwan
- Correspondence: ; Tel.: +886-2-2736-1661 (ext. 6553); Fax: +886-2-2737-3112
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Zhang YT, Zhao X, Yin YR, Wu SF, Zhang LN, DU XX, Zhang Y. [A new method of microglia sorting and functional characteristics of spinal microglia in aged rats]. Zhongguo Ying Yong Sheng Li Xue Za Zhi 2022; 38:91-96. [PMID: 35634677 DOI: 10.12047/j.cjap.6194.2022.017] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To establish an improved method of separating microglia from aged rats and to observe the biological characteristics of spinal microglia of aged rats. Methods: Young SD rats (2 months) were used as control group. Single cell suspension of rat microglia were prepared by trypsin, trypsin substitutes or mechanical net rubbing method. Then, by assessing the purity and survival rate of cells, and observing the morphological characteristics and analyzing the inflammatory functional characteristics, we optimized the isolation and purification method of microglia from aged rats (20 months old) , and observed the functional characteristics of spinal microglia in aged rats. Results: The survival rate of cells digested by pancreatic enzyme was low(young rats 83%, aged rats 60%). Although the survival rate of mechanical net rubbing method was higher than that of pancreatic enzyme digest methods (95%), the cell acquisition rate was lower(young rats(0.207±0.020)×106, aged rats(0.243±0.023)×106). Trypsin substitute dissociation combining density gradient centrifugation method was the best way to get abundant, active and higher survival microglia, and the purity reached more than 85%. We used this method to separate microglia from spinal cord of rats. Compared with the young rats, the spinal cord tissue of old rats was larger, the digestive fluid volume was higher, but the digestion time was shorter. Compared with the young rats, the aged rat spinal microglia had larger and rounder cell body, fewer and shorter protrusions, it tended to be activated morphologically, the level of proinflammatory cytokine IL-1β of microglia in aged rats was lower, and the level of antiinflammatory factor IL-10 was higher. Conclusion: The method of trypsin substitute dissociation combined with density gradient centrifugation was successfully established to isolate and purify microglia from spinal cord of rats, the spinal microglia of old rats showed anti-inflammatory phenotype.
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Affiliation(s)
- Yu-Tong Zhang
- Key Laboratory of Cellular Physiology, Ministry of Education; Department of Physiology, Shanxi Medical University, Taiyuan 030001, China
| | - Xin Zhao
- Key Laboratory of Cellular Physiology, Ministry of Education; Department of Physiology, Shanxi Medical University, Taiyuan 030001, China
| | - Yi-Ru Yin
- Key Laboratory of Cellular Physiology, Ministry of Education; Department of Physiology, Shanxi Medical University, Taiyuan 030001, China
| | - Shu-Fen Wu
- Key Laboratory of Cellular Physiology, Ministry of Education; Department of Physiology, Shanxi Medical University, Taiyuan 030001, China
| | - Li-Na Zhang
- Key Laboratory of Cellular Physiology, Ministry of Education; Department of Physiology, Shanxi Medical University, Taiyuan 030001, China
| | - Xiang-Xin DU
- Key Laboratory of Cellular Physiology, Ministry of Education; Department of Physiology, Shanxi Medical University, Taiyuan 030001, China
| | - Yu Zhang
- Key Laboratory of Cellular Physiology, Ministry of Education; Department of Physiology, Shanxi Medical University, Taiyuan 030001, China
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Chen Y, Zhang P, Lin X, Zhang H, Miao J, Zhou Y, Chen G. Mitophagy impairment is involved in sevoflurane-induced cognitive dysfunction in aged rats. Aging (Albany NY) 2020; 12:17235-17256. [PMID: 32903215 PMCID: PMC7521530 DOI: 10.18632/aging.103673] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [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: 12/17/2019] [Accepted: 07/02/2020] [Indexed: 01/24/2023]
Abstract
Postoperative cognitive dysfunction (POCD) is frequently observed in elderly patients following anesthesia, but its pathophysiological mechanisms have not been fully elucidated. Sevoflurane was reported to repress autophagy in aged rat neurons; however, the role of mitophagy, which is crucial for the control of mitochondrial quality and neuronal health, in sevoflurane-induced POCD in aged rats remains undetermined. Therefore, this study investigated whether mitophagy impairment is involved in sevoflurane-induced cognitive dysfunction. We found sevoflurane treatment inhibited mitochondrial respiration and mitophagic flux, changes in mitochondria morphology, impaired lysosomal acidification, and increased Tomm20 and deceased LAMP1 accumulation were observed in H4 cell and aged rat models. Rapamycin counteracted ROS induced by sevoflurane, restored mitophagy and improved mitochondrial function. Furthermore, rapamycin ameliorated the cognitive deficits observed in aged rats given sevoflurane anesthesia as determined by the Morris water maze test; this improvement was associated with an increased number of dendritic spines and pyramidal neurons. Overexpression of PARK2, but not mutant PARK2 lacking enzyme activity, in H4 cells decreased ROS and Tomm20 accumulation and reversed mitophagy dysfunction after sevoflurane treatment. These findings suggest that mitophagy dysfunction could be a mechanism underlying sevoflurane-induced POCD and that activating mitophagy may provide a new strategy to rescue cognitive deficits.
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Affiliation(s)
- Yeru Chen
- Department of Anesthesiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Piao Zhang
- Department of Anesthesiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Xianyi Lin
- Department of Anesthesiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Huan Zhang
- Department of Anesthesiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Jiamin Miao
- Department of Anesthesiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Youfa Zhou
- Department of Anesthesiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310058, Zhejiang, China
| | - Gang Chen
- Department of Anesthesiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310058, Zhejiang, China
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Wang S, Yu L, Sun G, Liu Y, Hu W, Liu Y, Peng T, Wang X, Cheng J, Sr A, Qin B, Lu H. Danhong Injection Protects Hemorrhagic Brain by Increasing Peroxiredoxin 1 in Aged Rats. Front Pharmacol 2020; 11:346. [PMID: 32292340 PMCID: PMC7135891 DOI: 10.3389/fphar.2020.00346] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 07/23/2019] [Accepted: 03/09/2020] [Indexed: 12/23/2022] Open
Abstract
Intracerebral hemorrhage (ICH) is a severe cerebrovascular disease with a high incidence, mortality and disability rate. Danhong injection (DHI) is beneficial for ischemic stroke, but is prohibited for ICH due to risk of bleeding. The present study aims to explore the potential therapeutic time window and molecular mechanism of DHI in a collagenase-induced ICH model in aged rats. DHI administration after ICH could significantly improve body weight and neurological deficits, and reduce the hematoma volume and brain water content when compared to the vehicle control. Furthermore, the protective effect of DHI administration on days 1–3 after ICH was superior to those on days 3–5 or 7–9 after ICH. DHI remarkably increased the Peroxiredoxin 1 (Prx1) expression in astrocytes and reduced the expression of inflammatory factors tumor necrosis factor-α (TNF-α) and interleukin-β (IL-1β) after ICH. The immediate treatment of Prx1 inhibiter chelerythrine (Che) after ICH abolished the protective effect of DHI. Furthermore, the Che treatment reduced the expression of Prx1 in astrocytes, but increased the expression of TNF-α and IL-1β after ICH. DHI treatment could not reverse these changes. Therefore, the earlier DHI is administered, the better the neuroprotective effect. DHI exerts antioxidative and anti-inflammatory function by increasing Prx1 in astrocytes. These present results may change the established understanding of DHI, and reveal a novel treatment approach for ICH.
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Affiliation(s)
- Shang Wang
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Lie Yu
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Guifang Sun
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yu Liu
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Wentao Hu
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yanru Liu
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Tao Peng
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xiaojun Wang
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Jingliang Cheng
- Department of Magnetic Resonance, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Aravintakumar Sr
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Bo Qin
- Translational Medicine Centre, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Hong Lu
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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Li PJ, Guo YQ, Ding PY, Liu RB, Deng F, Feng XX, Yan WJ. Neuroprotective effects of a Smoothened receptor agonist against postoperative cognitive dysfunction by promoting autophagy in the dentate gyrus of aged rats. Neurol Res 2019; 41:867-874. [PMID: 31221056 DOI: 10.1080/01616412.2019.1628411] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Objectives: To investigate the effect of purmorphamine (PUR), a Shh co-receptor Smoothened (Smo) agonist, on postoperative cognitive dysfunction (POCD) rat models. Methods: Eighteen-month-old male Sprague-Dawley rats were subjected to intramedullary fixation of a tibial fracture with 7% chloral hydrate anesthesia to mimic human clinical surgery. PUR was administered via an intraperitoneal injection at a dose of 15mg/kg/day for 3 consecutive days at 6 h after surgery. The aged rats were sacrificed after performing a Morris water maze test 1, 3, and 7 days postoperatively to evaluate the expression of related proteins at the appointed time. Results: Compared to the POCD + vehicle group and sham + PUR group, the POCD + PUR group restored neurological deficit (P = 0.01). PUR administration induced upregulation of Shh expression on postoperative day 1 (P = 0.02), which continued on the third day (P = 0.008) but dropped by the 7th day (P = 0.03). Immunofluorescent analysis, similar to western blot analysis, showed a significant increase in the autophagy-marker LC3 (P = 0.006) as well as p62 degradation (P = 0.000) in the dentate gyrus of the aged rats (P = 0.000) after PUR treatment. Importantly, LC3 was mainly found in the presynaptic and postsynaptic membranes of the hippocampus. Conclusions: These results indicate a link between Shh and autophagy in the rat model of POCD, providing new insights into Shh signaling pathway-mediated mechanisms of neuroprotection and cognitive repair after POCD. It also provides a potential entry point for the development of clinical drugs.
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Affiliation(s)
- Pei-Jun Li
- Department of Anesthesiology, Gansu Province People's Hospital , LanZhou , China
| | - Ying-Qiang Guo
- Department of Anesthesiology, Gansu Province People's Hospital , LanZhou , China
| | - Pei-Yan Ding
- Department of Anesthesiology, Gansu Province People's Hospital , LanZhou , China
| | - Ruo-Bing Liu
- Department of Anesthesiology, Gansu Province People's Hospital , LanZhou , China
| | - Fei Deng
- Department of Anesthesiology, Gansu Province People's Hospital , LanZhou , China
| | - Xiao-Xue Feng
- Department of Anesthesiology, Gansu Province People's Hospital , LanZhou , China
| | - Wen-Jun Yan
- Department of Anesthesiology, Gansu Province People's Hospital , LanZhou , China.,Lanzhou University , LanZhou , China
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Thet-Thet-Lwin, Yoneyama A, Imai M, Maruyama H, Hyodo K, Takeda T. Testicular seminoma in the aged rat visualized by phase-contrast X-ray computed tomography. Acta Radiol Open 2018; 7:2058460118806657. [PMID: 30377541 PMCID: PMC6202748 DOI: 10.1177/2058460118806657] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 09/22/2018] [Indexed: 11/16/2022] Open
Abstract
Spontaneously growing testicular seminoma in the aged rat was imaged by
one of the most sensitive imaging modalities, namely, phase-contrast
X-ray computed tomography (CT) with crystal X-ray interferometry.
Phase-contrast X-ray CT clearly depicted the detailed inner structures
of the tumor and provided 20× magnified images compared to
light-microscopic images. Phase-contrast X-ray CT images are generated
based on density variations in the object, whereas pathological images
are based on differentiation of cellular structures, such as the
cellular nuclei and cytoplasm. The mechanism of image generation
differs between the two techniques: phase-contrast X-ray CT detects
even minute differences in the density among pathological structures,
depending, for example, on the number and sizes of the nuclei,
variations of the cytoplasmic components, and presence/absence of
fibrous septa, cystic changes, and hemorrhage. Thus, phase-contrast
X-ray CT with a spatial resolution of 26 µm might allow prediction of
the morphological characteristics of a tumor even before
histopathological processing.
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Affiliation(s)
- Thet-Thet-Lwin
- School of Allied Health Sciences, Kitasato University, Kanagawaken, Japan.,Graduate School of Medical Sciences, Kitasato University, Kanagawaken, Japan
| | - Akio Yoneyama
- SAGA Light Source, Kyushu Synchrotron Light Research Center, Saga, Japan
| | - Motoki Imai
- Graduate School of Medical Sciences, Kitasato University, Kanagawaken, Japan
| | - Hiroko Maruyama
- School of Allied Health Sciences, Kitasato University, Kanagawaken, Japan.,Graduate School of Medical Sciences, Kitasato University, Kanagawaken, Japan
| | - Kazuyuki Hyodo
- Institute of Materials Structure Science, High Energy Accelerator Organization (KEK), Ibarakiken, Japan
| | - Tohoru Takeda
- School of Allied Health Sciences, Kitasato University, Kanagawaken, Japan.,Graduate School of Medical Sciences, Kitasato University, Kanagawaken, Japan
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Li W, Chai Q, Zhang H, Ma J, Xu C, Dong J, Wei X, Wang Z, Zhang K. High doses of minocycline may induce delayed activation of microglia in aged rats and thus cannot prevent postoperative cognitive dysfunction. J Int Med Res 2018; 46:1404-1413. [PMID: 29458276 PMCID: PMC6091817 DOI: 10.1177/0300060517754032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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] [Indexed: 11/26/2022] Open
Abstract
Objective Postoperative cognitive dysfunction (POCD) is common after surgery in elderly patients and is associated with high morbidity. The molecular mechanisms responsible for POCD are unknown. Minocycline, an inhibitor of microglial activation, may be useful in treating and preventing POCD. We explored whether minocycline can inhibit microglial activation and prevent POCD in aged rats as a surgery model. Methods Rats aged 18 to 20 months were randomly allocated to the following groups: naïve, abdominal surgery alone, or minocycline injection before abdominal surgery. Hippocampal cytokine mRNA levels were measured at 3 hours, 1 day, 3 days, and 7 days after surgery, and microglial activation was measured at 3 hours and 7 days after surgery. Memory was assessed using the Morris water maze test. Results Surgery resulted in severe cognitive impairment in aged rats and induced a significant neuroinflammatory response and microglial activation. The use of minocycline can prevent microglial activation after surgery, but delayed microglial activation may occur. The use of minocycline may further impair memory after surgery. Conclusion Minocycline can restrain microglial activation and restrict the inflammatory response in the hippocampus early after surgery, but it may induce delayed microglial activation and cannot prevent POCD in aged rats.
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Affiliation(s)
- Wenyao Li
- Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Qing Chai
- Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Hongwei Zhang
- Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Jing Ma
- Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Chengfen Xu
- Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Jifu Dong
- Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Xianghua Wei
- Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Zhiyi Wang
- Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Kexian Zhang
- Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
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Aydın AF, Küçükgergin C, Çoban J, Doğan-Ekici I, Doğru-Abbasoğlu S, Uysal M, Koçak-Toker N. Carnosine prevents testicular oxidative stress and advanced glycation end product formation in D-galactose-induced aged rats. Andrologia 2017; 50. [PMID: 29230838 DOI: 10.1111/and.12939] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/17/2017] [Indexed: 12/12/2022] Open
Abstract
D-Galactose is shown to mimic natural ageing in rodents by exacerbating oxidative stress and glycation. Steroid production and having a poor antioxidant system make testis vulnerable to galactose-induced ageing. Antioxidation and antiglycating actions of carnosine may be intriguing for prevention of testicular ageing. In this study, male Wistar rats were applied D-galactose (300 mg/kg; subcutaneously 5 days a week) and carnosine (250 mg/kg; intraperitoneally 5 days a week) along with D-galactose for 2 months. D-Galactose treatment increased testicular reactive oxygen species, thiobarbituric acid reactive substances, diene conjugates, protein carbonyls, advanced oxidation products of proteins and advanced glycation end products. Carnosine was capable of repelling oxidative stress and glycation produced by D-galactose. Johnsen's score, which describes histopathological evaluation, was also significantly improved with preserved spermatogenesis by carnosine. It appears that carnosine deters the testicular oxidative stress due to galactose-induced ageing directly by its antioxidative and antiglycating properties.
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Affiliation(s)
- A F Aydın
- Department of Biochemistry, İstanbul Medical Faculty, İstanbul University, İstanbul, Turkey
| | - C Küçükgergin
- Department of Biochemistry, İstanbul Medical Faculty, İstanbul University, İstanbul, Turkey
| | - J Çoban
- Department of Biochemistry, Yeditepe University Medical Faculty, İstanbul, Turkey
| | - I Doğan-Ekici
- Department of Medical Pathology, Yeditepe University Medical Faculty, İstanbul, Turkey
| | - S Doğru-Abbasoğlu
- Department of Biochemistry, İstanbul Medical Faculty, İstanbul University, İstanbul, Turkey
| | - M Uysal
- Department of Biochemistry, İstanbul Medical Faculty, İstanbul University, İstanbul, Turkey
| | - N Koçak-Toker
- Department of Biochemistry, İstanbul Medical Faculty, İstanbul University, İstanbul, Turkey
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Samarghandian S, Azimi-Nezhad M, Borji A, Farkhondeh T. Effect of crocin on aged rat kidney through inhibition of oxidative stress and proinflammatory state. Phytother Res 2016; 30:1345-53. [PMID: 27279282 DOI: 10.1002/ptr.5638] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 04/17/2016] [Accepted: 04/19/2016] [Indexed: 12/11/2022]
Abstract
This study evaluated whether crocin, a bioactive component of saffron, has a protective effect on kidney through reducing the oxidative stress and inflammatory response in aged rats. In this study the changes in activities of antioxidant enzymes, lipid peroxidation, glutathione (GSH) levels and the expression of pro-inflammatory cytokines in the serum and renal tissue were evaluated by ELISA and RT-PCR, respectively. The middle and aged rats were given intraperitoneal injections of crocin (10, 20, 30 mg/kg/day) for 4 weeks. After 4 weeks, animals were anesthetized with diethyl ether. The kidney samples were taken for biochemical analysis. The results revealed the aging was associated with a significant decrease in the activities of antioxidant enzymes, and GSH content with increase in lipid peroxidation level in kidney of the aged rats (p < 0.001). The increased levels of serum renal functional parameter, oxidative parameters (p < 0.01) and also pro-inflammatory cytokine levels were significantly reduced by crocin administration (p < 0.05). The aged rats exhibited a dysregulation of the oxidative stress, and inflammation in the kidneys, but crocin treatment significantly reduced the expression of the inflammatory genes. These results provide pivotal documentation that crocin has a renoprotective effects against the development of oxidative stress and inflammation in the kidney of old rats. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Saeed Samarghandian
- Department of Basic Medical sciences, Neyshabur University of Medical Sciences, Neyshabur, Iran
| | - Mohsen Azimi-Nezhad
- Department of Basic Medical sciences, Neyshabur University of Medical Sciences, Neyshabur, Iran.,Medical Genetics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Abasalt Borji
- Department of Basic Medical sciences, Neyshabur University of Medical Sciences, Neyshabur, Iran
| | - Tahereh Farkhondeh
- Department of Immunogenetics, BuAli Research Institute, Mashhad University of Medical Sciences, Mashhad, Iran
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Lwin TT, Yoneyama A, Hara A, Ohbu M, Maruyama H, Taguchi M, Esashi S, Matsushima T, Terazaki K, Hyodo K, Takeda T. Spontaneous brain tumor imaging of aged rat by crystal X-ray interferometer-based phase-contrast X-ray CT. Acta Radiol Open 2016; 5:2058460115626958. [PMID: 26962462 PMCID: PMC4765814 DOI: 10.1177/2058460115626958] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 12/15/2015] [Accepted: 12/20/2015] [Indexed: 12/01/2022] Open
Abstract
Background Crystal X-ray interferometer-based phase-contrast X-ray computed tomography (C-PCCT) enables the depiction of internal structures of biological tissue without contrast agents. Purpose To determine the advantage of this technique in visualizing detailed morphological structures of a rare spontaneous brain tumor in an aged rat. Material and Methods An aged rat’s spontaneous brain tumor was imaged by C-PCCT without contrast agent. Three-dimensional (3D) images of the tumor microvasculature were reconstructed and compared with pathological pictures. Results C-PCCT depicted the tumor’s various pathological features clearly, e.g. its cell density and vasculature, and blood clots caused by hemorrhaging and/or hematomas. The obtained images resembled pathological pictures with a magnification of ×20 and were used to reconstruct 3D images of the tumor vascularity up to approximately 26 µm in diameter. Conclusion Since C-PCCT is able to depict various pathological conditions, it might be useful for cancer research.
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Affiliation(s)
- Thet-Thet Lwin
- Allied Health Sciences, Kitasato University, Sagamihara, Japan; Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Akio Yoneyama
- Allied Health Sciences, Kitasato University, Sagamihara, Japan; Kitasato University, School of Medicine, Sagamihara, Japan
| | - Atsuko Hara
- Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan; Kitasato University, School of Medicine, Sagamihara, Japan
| | - Makoto Ohbu
- Allied Health Sciences, Kitasato University, Sagamihara, Japan; Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Hiroko Maruyama
- Allied Health Sciences, Kitasato University, Sagamihara, Japan; Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Masaya Taguchi
- Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Shogo Esashi
- Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Tsubasa Matsushima
- Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Kei Terazaki
- Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Kazuyuki Hyodo
- High Energy Accelerator Research Organization, Tsukuba, Japan
| | - Tohoru Takeda
- Allied Health Sciences, Kitasato University, Sagamihara, Japan; Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
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Carageorgiou H, Sideris AC, Messari I, Liakou CI, Tsakiris S. The effects of rivastigmine plus selegiline on brain acetylcholinesterase, (Na, K)-, Mg-ATPase activities, antioxidant status, and learning performance of aged rats. Neuropsychiatr Dis Treat 2008; 4:687-99. [PMID: 19043511 PMCID: PMC2536534 DOI: 10.2147/ndt.s3272] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
UNLABELLED We investigated the effects of rivastigmine (a cholinesterase inhibitor) and selegiline ((-)deprenyl, an irreversible inhibitor of monoamineoxidase-B), alone and in combination, on brain acetylcholinesterase (AChE), (Na(+), K(+))-, Mg(2+)-ATPase activities, total antioxidant status (TAS), and learning performance, after long-term drug administration in aged male rats. The possible relationship between the biochemical and behavioral parameters was evaluated. METHODS Aged rats were treated (for 36 days) with rivastigmine (0.3 mg/kg rat/day ip), selegiline (0.25 mg/kg rat/day im), rivastigmine plus selegiline in the same doses and way of administration as separately. Aged and adult control groups received NaCl 0.9% 0.5 ml ip. RESULTS TAS was lower in aged than in adult rats, rivastigmine alone does not affect TAS, decreases AChE activity, increases (Na(+), K(+))-ATPase and Mg(2+)-ATPase activity of aged rat brain and improves cognitive performance. Selegiline alone decreases free radical production and increases AChE activity and (Na(+), K(+))-ATPase activity, improving cognitive performance as well. In the combination: rivastigmine seems to cancel selegiline action on TAS and AChE activity, while it has additive effect on (Na(+), K(+))-ATPase activity. In the case of Mg(2+)-ATPase selegiline appears to attenuate rivastigmine activity. No statistically significant difference was observed in the cognitive performance. CONCLUSION Reduced TAS, AChE activity and learning performance was observed in old rats. Both rivastigmine and selesiline alone improved performance, although they influenced the biochemical parameters in a different way. The combination of the two drugs did not affect learning performance.
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Affiliation(s)
- Haris Carageorgiou
- Department of Pharmacology, Medical School, University of Athens Athens, Greece
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