Arginine promotes porcine type I muscle fibres formation through improvement of mitochondrial biogenesis

2019 ◽  
Vol 123 (5) ◽  
pp. 499-507 ◽  
Author(s):  
Xiaoling Chen ◽  
Xiaoming Luo ◽  
Daiwen Chen ◽  
Bing Yu ◽  
Jun He ◽  
...  
Keyword(s):  
Mitochondrial Biogenesis ◽  
Basal Diet ◽  
Sirtuin 1 ◽  
Control Group ◽  
Muscle Fibres ◽  
Type I ◽  
Mrna Levels ◽  
Nuclear Respiratory Factor

AbstractThe present study aimed to investigate whether arginine (Arg) promotes porcine type I muscle fibres formation via improving mitochondrial biogenesis. In the in vivo study, a total of sixty Duroc × Landrace × Yorkshire weaning piglets with an average body weight of 6·55 (sd 0·36) kg were randomly divided into four treatments and fed with a basal diet or a basal diet supplemented with 0·5, 1·0 and 1·5 % l-Arg, respectively, in a 4-week trial. Results showed that dietary supplementation of 1·0 % Arg significantly enhanced the activity of succinate dehydrogenase, up-regulated the protein expression of myosin heavy chain I (MyHC I) and increased the mRNA levels of MyHC I, troponin I1, C1 and T1 (Tnni1, Tnnc1 and Tnnt1) in longissimus dorsi muscle compared with the control group. In addition, ATPase staining analysis indicated that 1·0 % Arg supplementation significantly increased the number of type I muscle fibres and significantly decreased the number of type II muscle fibres. Furthermore, 1·0 % Arg supplementation significantly up-regulated PPAR-γ coactivator-1α (PGC-1α), sirtuin 1 and cytochrome c (Cytc) protein expressions, increased PGC-1α, nuclear respiratory factor 1 (NRF1), mitochondria transcription factor B1 (TFB1M), Cytc and ATP synthase subunit C1 (ATP5G) mRNA levels and increased mitochondrial DNA content. In the in vitro study, mitochondrial complex I inhibitor rotenone (Rot) was used. We found that Rot annulled Arg-induced type I muscle fibres formation. Together, our results provide for the first time the evidence that Arg promotes porcine type I muscle fibres formation through improvement of mitochondrial biogenesis.

scholarly journals miR-29a Modulates GSK3β/SIRT1-Linked Mitochondrial Proteostatic Stress to Ameliorate Mouse Non-Alcoholic Steatohepatitis

2020 ◽  
Vol 21 (18) ◽  
pp. 6884
Author(s):  
Ya-Ling Yang ◽  
Pei-Wen Wang ◽  
Feng-Sheng Wang ◽  
Hung-Yu Lin ◽  
Ying-Hsien Huang
Keyword(s):  
Mitochondrial Biogenesis ◽  
Glycogen Synthase ◽  
In Silico Analysis ◽  
Bioinformatic Analysis ◽  
Sirtuin 1 ◽  
Luciferase Reporter ◽  
Alcoholic Fatty Liver ◽  
Hepatocellular Damage

MicroRNA-29a (miR-29a) has been shown to ameliorate hepatocellular damage, such as in the context of non-alcoholic fatty liver disease (NAFLD), steatohepatitis (NASH), and cholestatic injury. However, the mechanism mediating the hepatoprotective effect of miR-29a in diet-induced NASH remains elusive. In the present study, C57BL/6 mice of wild-type (WT) or miR-29a overexpression were fed with methionine–choline sufficient (MCS) or methionine–choline-deficient (MCD) diet for four weeks. The C57BL/6 mice harboring miR-29a overexpression presented reduced plasma AST, hepatic CD36, steatosis, and fibrosis induced by MCD. The TargetScan Release7.2-based bioinformatic analysis, KEGG pathway analysis, and luciferase reporter assay confirmed that miR-29a targets 3′UTR of glycogen synthase kinase 3 beta (Gsk3b) mRNA in the HepG2 hepatocyte cell line. Furthermore, miR-29a overexpression in the MCD-fed group resulted in inhibition of Gsk3b mRNA and GSK3β protein levels in the liver. GSK3β was notably expressed jointly with the extent of aggregated protein, which was then identified to be associated with mitochondrial unfolded protein response (UPRmt), but not with endoplasmic reticulum UPR (UPRER). Additionally, in silico analysis of protein–protein interaction, in vivo, and in vitro correlation analyses of protein expression demonstrated that GSK3β closely associated with sirtuin 1(SIRT1). Finally, the implication of SIRT1-mediated mitochondrial biogenesis in the perturbation of proteostasis was observed. We herein provide novel insight into a hepatoprotective pathway, whereby miR-29a inhibits GSK3β to repress SIRT1-mediated mitochondrial biogenesis, leading to alleviation of mitochondrial proteostatic stress and UPRmt in the context of NASH. miR-29a, GSK3β, and SIRT1 could thus serve as possible therapeutic targets to improve the treatment of NAFLD/NASH.

scholarly journals In Vivo Antiviral Effects of U18666A Against Type I Feline Infectious Peritonitis Virus

Pathogens ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 67 ◽  
Author(s):  
Tomoyoshi Doki ◽  
Tomoyo Tarusawa ◽  
Tsutomu Hohdatsu ◽  
Tomomi Takano
Keyword(s):  
Clinical Symptoms ◽  
Treated Group ◽  
Control Group ◽  
Type I ◽  
Feline Infectious Peritonitis Virus ◽  
Feline Infectious Peritonitis ◽  
Amphiphilic Drug ◽  
Antiviral Effects

Background: The cationic amphiphilic drug U18666A inhibits the proliferation of type I FIPV in vitro. In this study, we evaluated the in vivo antiviral effects of U18666A by administering it to SPF cats challenged with type I FIPV. Methods: Ten SPF cats were randomly assigned to two experimental groups. FIPV KU-2 were inoculated intraperitoneally to cats. The control group was administered PBS, and the U18666A-treated group was administered U18666A subcutaneously at 2.5 mg/kg on day 0, and 1.25 mg/kg on days 2 and 4 after viral inoculation. Results: Two of the five control cats administered PBS alone developed FIP. Four of the five cats administered U18666A developed no signs of FIP. One cat that temporarily developed fever, had no other clinical symptoms, and no gross lesion was noted on an autopsy after the end of the experiment. The FIPV gene was detected intermittently in feces and saliva regardless of the development of FIP or administration of U18666A. Conclusions: When U18666A was administered to cats experimentally infected with type I FIPV, the development of FIP might be suppressed compared with the control group. However, the number of animals with FIP is too low to establish anti-viral effect of U18666A in cats.

scholarly journals Neuroprotective Effect and Mechanism of Thiazolidinedione on Dopaminergic Neurons In Vivo and In Vitro in Parkinson’s Disease

PPAR Research ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Yanqin Wang ◽  
Weilin Zhao ◽  
Ge Li ◽  
Jinhu Chen ◽  
Xin Guan ◽  
...  
Keyword(s):  
Dopaminergic Neurons ◽  
Neuroprotective Effect ◽  
Oral Treatment ◽  
Treated Group ◽  
Control Group ◽  
Peroxisome Proliferator ◽  
Peroxisome Proliferator Activated Receptor ◽  
Nuclear Respiratory Factor

The aim of the present study was to gain insight into the neuroprotection effects and mechanism of thiazolidinedione pioglitazone in both in vitro and in vivo MPP+/MPTP induced PD models. In vivo experimental results showed that oral treatment of pioglitazone resulted in significant improvements in behavior symptoms damaged by MPTP and increase in the survival of TH positive neurons in the pioglitazone intervention groups. In addition, oral treatment of pioglitazone increased the expression of peroxisome proliferator-activated receptor-γ coactivator of 1α (PGC-1α) and increased the number of mitochondria, along with an observed improvement in mitochondrial ultrastructure. From in vitro studies, 2,4-thiazolidinedione resulted in increased levels of molecules regulated function of mitochondria, including PGC-1α, nuclear respiratory factor 1 (NRF1), NRF2, and mitochondria fusion 2 (Mfn2), and inhibited mitochondria fission 1 (Fis1). We show that protein levels of Bcl-2 and ERK were reduced in the MPP+-treated group compared with the control group. This effect was observed to be reversed upon treatment with 2,4-thiazolidinedione, as Bcl-2 and ERK expression levels were increased. We also observed that levels of the apoptotic protein Bax showed opposite changes compared to Bcl-2 and ERK levels. The results from this study confirm that pioglitazone/2,4-thiazolidinedione is able to activate PGC-1α and prevent damage of dopaminergic neurons and restore mitochondria ultrastructure through the regulation of mitochondria function.

scholarly journals The Effect of Diet on Improved Endurance in Male C57BL/6 Mice

Nutrients ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 1101 ◽  
Author(s):  
Jin Yu ◽  
Hong Zhu ◽  
Saeid Taheri ◽  
Stephen Perry ◽  
Mark Kindy
Keyword(s):  
Mitochondrial Biogenesis ◽  
Fruits And Vegetables ◽  
Sirtuin 1 ◽  
Peroxisome Proliferator ◽  
Peroxisome Proliferator Activated Receptor ◽  
Nuclear Respiratory Factor ◽  
Mitochondrial Transcription Factor ◽  
Exercise Endurance ◽  
The Impact

The consumption of fruits and vegetables appears to help with maintaining an adequate level of exercise and improves endurance. However, the mechanisms that are involved in this process are not well understood. In the current study, the impact of diets enriched in fruits and vegetables (GrandFusion®) on exercise endurance was examined in a mouse model. GrandFusion (GF) diets increased mitochondrial DNA and enzyme activity, while they also stimulated mitochondrial mRNA synthesis in vivo. GF diets increased both the mRNA expression of factors involved in mitochondrial biogenesis, peroxisome proliferator-activated receptor gamma coactivator 1 alpha (PGC-1α), mitochondrial transcription factor A (Tfam), estrogen-related receptor alpha (ERRα), nuclear respiratory factor 1 (NRF-1), cytochrome c oxidase IV (COXIV) and ATP synthase (ATPsyn). Mice treated with GF diets showed an increase in running endurance, rotarod perseverance and grip strength when compared to controls who were on a regular diet. In addition, GF diets increased the protein expression of phosphorylated AMP-activated protein kinase (AMPK), sirtuin 1 (SIRT1), PGC-1α and peroxisome proliferator-activated receptor delta (PPAR-δ), which was greater than exercise-related changes. Finally, GF reduced the expression of phosphorylated ribosomal protein S6 kinase 1 (p-S6K1) and decreased autophagy. These results demonstrate that GF diets enhance exercise endurance, which is mediated via mitochondrial biogenesis and function.

scholarly journals Investigation of Chemical Composition, Antioxidant Activity, and the Effects of Alfalfa Flavonoids on Growth Performance

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Si Chen ◽  
Xiang Li ◽  
Xin Liu ◽  
Ning Wang ◽  
Qi An ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Growth Performance ◽  
Antioxidant Activities ◽  
Colorimetric Method ◽  
Basal Diet ◽  
Feed Additive ◽  
Control Group

The flavonoids were extracted from alfalfa using ethanol assisted with ultrasonic extraction and purified by D101 macroporous resin column chromatography. The chemical composition and content of ethanol elution fractions (EEFs) were assessed by ultrahigh-performance liquid chromatography and hybrid quadrupole time of flight mass spectrometry (UHPLC-Q-TOF-MS) and aluminum nitrate-sodium nitrite-sodium hydroxide colorimetric method. The in vitro antioxidant activity of two EEFs was conducted by scavenging DPPH free radical, and the main antioxidants of 75% EEFs were screened using DPPH-UHPLC. Moreover, the in vivo antioxidant activity of 75% EEFs and the growth performance of broilers were studied. The results showed that the content of 30% and 75% EEFs was 26.20% and 62.57%. Fifteen compounds were identified from 75% EEFs, and five of them were reported in alfalfa for the first time. The scavenging activity of 75% and 30% EEFs (200 μg/mL) against DPPH was 95.51% and 78.85%. The peak area of 5,3′,4′-trihydroxyflavone and hyperoside was decreased by 82.69% and 76.04%, which exhibited strong scavenging capacities. The total antioxidant capacity (T-AOC), superoxide dismutase (SOD), and glutathione peroxidase (GSH-PX) level of three treated groups against the normal control group (NC) fed with basal diet significantly increased by 3.89-24.49%, 0.53-7.39%, and 0.79-11.79%, respectively. While the malondialdehyde (MDA) decreased by 0.47-18.27%. Compared with the NC, the feed to gain ratio (F : G) of three treated groups was lowered by 2.98-16.53% and survival rate of broilers significantly increased. Consequently, 75% EEFs extracted from alfalfa exhibited powerful antioxidant activities and might be a potential feed additive to poultry and livestock.

Erectile dysfunction in the type II diabetic db/db mouse: impaired venoocclusion with altered cavernosal vasoreactivity and matrix

2008 ◽  
Vol 294 (5) ◽  
pp. H2204-H2211 ◽  
Author(s):  
Ian P. Luttrell ◽  
Mei Swee ◽  
Barry Starcher ◽  
William C. Parks ◽  
Kanchan Chitaley
Keyword(s):  
Erectile Dysfunction ◽  
Erectile Function ◽  
Leptin Receptor ◽  
Science Studies ◽  
Type I Diabetes ◽  
Type I ◽  
Mrna Levels ◽  
Type Ii

The number of men with type II diabetes-associated erectile dysfunction (ED) continues to grow rapidly; however, the majority of basic science studies has examined mechanisms of ED in animal models of type I diabetes. In this study, we first establish an in vivo mouse model of type II diabetic ED using the leptin receptor mutated db/ db and wild-type control BKS mouse. Furthermore, we hypothesized that dual mechanistic impairments contribute to the impaired erectile function in the type II diabetic mouse, altered vasoreactivity, and venoocclusive disorder. In vivo erectile function was measured as intracavernosal pressure (ICP) normalized to mean arterial pressure (MAP) following electrical stimulation of the cavernosal nerve. Venoocclusion was assessed by the maintenance of elevated in vivo ICP following intracorporal saline infusion. Vasoreactivity of isolated cavernosum in response to contractile and dilatory stimulation was examined in vitro by myography. Collagen and elastin content were evaluated by quantification of hydroxyproline and desmosine, respectively, as well as by quantitative PCR and histological analysis of isolated cavernosum. Erectile function was significantly decreased in db/ db vs. BKS mice in a manner consistent with impairments in venoocclusive ability and decreased inflow. Heightened vasoconstriction and attenuated dilation in cavernosum of db/ db vs. BKS mice suggest an overall lowered relaxation ability and thus impaired filling of the cavernosal spaces. A decrease in desmosine and hydroxyproline as well as lowered mRNA levels for tropoelastin, fibrillin-1, and α1(I) collagen were detected. These vasoreactive and sinusoidal matrix alterations may alter tissue compliance dispensability, preventing the normal expansion necessary for erection.

Experimental induced wound cicatrisation after highly diluted products treatment

2021 ◽  
Vol 11 (40) ◽  
pp. 211-212
Author(s):  
Fernando Fortunato Jeronimo ◽  
Jenifer Pendiuk Gonçalves ◽  
Katia Fialho Do Nascimento ◽  
Simone Martins De Oliveira ◽  
Carolina Camargo De Oliveira ◽  
...  
Keyword(s):  
Connective Tissue ◽  
Inflammatory Cells ◽  
Control Group ◽  
Type I ◽  
Chelidonium Majus ◽  
Conium Maculatum ◽  
The Matrix ◽  
Aconitum Napellus

Introduction: Skin is an attractive target to study extracellular matrix, due to abundance in Connective tissue. In cases of injuries the first step is an inflammatory reaction and subsequent the healing that involves several changes in the matrix. These changes are fundamental to inflammatory cells activities allowing healing. Highly diluted products were shown to facilitate inflammatory mediators and to activate immune cells in vivo and in vitro, thus it can be effective to wound healing. Aims: This study aims to evaluate highly diluted products effects on inflammation and cicatrization process. Methodology: Three compounds (M8 (Aconitum napellus 20dH, Arsenicum album 18dH, Asa foetida 20dH, Calcarea carbonica 16dH, Conium maculatum 17dH, Ipecacuanha 13dH, Phosphorus 20dH, Rhus toxicodendron 17dH, Silicea 20dH, Sulphur 24dH, Thuja occidentalis 19dH), M1 (Chelidonium majus 20dH, Cinnamon 20dH, Echinaceae purpurea 20dH, Gelsemium sempervirens 20dH plus all M8 compounds) and Curcuma cH30 – simple product), were manipulated as a gel and applied on mice dorsal flank after incision and suture (approximately 1 cm and three points), for 3 consecutive days. After the treatments the scars were evaluated macroscopically, the animals were killed, the skin samples collected, fixed and processed for Hematoxilin-Eosin (HE) and Masson Tricromic (to observe the collagen fibers type I). The slices were analyzed and images collected by a light microscope Olympus BX51 with camera attached Olympus DP72. Results: It was observed a higher and faster rate of tissue epithelization in the treated groups after three days of gel-product application. This could be observed in lower rates in the control group (no treatment) - Figure 1 and 2). Regeneration and organization of connective tissue were proportional to epithelization the treated groups. We also observed evidences of changes in amount of neutrophils and fibroblasts, resulting in changes in the healing period. Analyses for these confirmations are in progress.

scholarly journals In vitro and in vivo tenocyte-protective effectiveness of dehydroepiandrosterone against high glucose-induced oxidative stress

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Shintaro Mukohara ◽  
Yutaka Mifune ◽  
Atsuyuki Inui ◽  
Hanako Nishimoto ◽  
Takashi Kurosawa ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Matrix Metalloproteinase ◽  
Protein Expression ◽  
Achilles Tendon ◽  
Mrna Expression ◽  
High Glucose ◽  
Control Group ◽  
Type I

Abstract Background Dehydroepiandrosterone (DHEA), an adrenal steroid, has a protective role against diabetes. This study aimed to investigate the in vitro and in vivo protective effects of DHEA against high glucose-induced oxidative stress in tenocytes and tendons. Methods Tenocytes from normal Sprague-Dawley rats were cultured in low-glucose (LG) or high-glucose (HG) medium with or without DHEA. The experimental groups were: control group (LG without DHEA), LG with DHEA, HG without DHEA, and HG with DHEA. Reactive oxygen species (ROS) production, apoptosis, and messenger RNA (mRNA) expression of NADPH oxidase (NOX) 1 and 4, and interleukin-6 (IL-6) were determined. Further, diabetic rats were divided into a control group and a DHEA-injected group (DHEA group). NOX1 and NOX4 protein expression and mRNA expression of NOX1, NOX4, IL-6, matrix metalloproteinase (MMP)-2, tissue inhibitors of matrix metalloproteinase (TIMP)-2, and type I and III collagens in the Achilles tendon were determined. Results In rat tenocytes, DHEA decreased the expression of NOX1 and IL-6, ROS accumulation, and apoptotic cells. In the diabetic rat Achilles tendon, NOX1 protein expression and mRNA expression of NOX1, IL-6, MMP-2, TIMP-2, and type III collagen were significantly lower while type I collagen expression was significantly higher in the DHEA group than in the control group. Conclusions DHEA showed antioxidant and anti-inflammatory effects both in vitro and in vivo. Moreover, DHEA improved tendon matrix synthesis and turnover, which are affected by hyperglycemic conditions. DHEA is a potential preventive drug for diabetic tendinopathy.

scholarly journals Impact of Zinc and/or Herbal Mixture on Ruminal Fermentation, Microbiota, and Histopathology in Lambs

2021 ◽  
Vol 8 ◽  
Author(s):  
Daniel Petrič ◽  
Dominika Mravčáková ◽  
Katarína Kucková ◽  
Svetlana Kišidayová ◽  
Adam Cieslak ◽  
...  
Keyword(s):  
Basal Diet ◽  
Medicinal Herbs ◽  
Morphological Observation ◽  
Control Group ◽  
Ruminal Fermentation ◽  
Artemisia Absinthium ◽  
Herbal Mixture ◽  
Organic Zinc

We investigated the effect of diets containing organic zinc and a mixture of medicinal herbs on ruminal microbial fermentation and histopathology in lambs. Twenty-eight lambs were divided into four groups: unsupplemented animals (Control), animals supplemented with organic zinc (Zn, 70 mg Zn/kg diet), animals supplemented with a mixture of dry medicinal herbs (Herbs, 100 g dry matter (DM)/d) and animals supplemented with both zinc and herbs (Zn+Herbs). Each lamb was fed a basal diet composed of meadow hay (700 g DM/d) and barley (300 g DM/d). The herbs Fumaria officinalis L. (FO), Malva sylvestris L. (MS), Artemisia absinthium L. (AA) and Matricaria chamomilla L. (MC) were mixed in equal proportions. The lambs were slaughtered after 70 d. The ruminal contents were used to determine the parameters of fermentation in vitro and in vivo and to quantify the microbes by molecular and microscopic methods. Samples of fresh ruminal tissue were used for histopathological evaluation. Quantitative analyses of the bioactive compounds in FO, MS, AA, and MC identified 3.961, 0.654, 6.482, and 12.084 g/kg DM phenolic acids and 12.211, 6.479, 0.349, and 2.442 g/kg DM flavonoids, respectively. The alkaloid content in FO was 6.015 g/kg DM. The diets affected the levels of total gas, methane and n-butyrate in vitro (P < 0.046, < 0.001, and < 0.001, respectively). Relative quantification by real-time PCR indicated a lower total ruminal bacterial population in the lambs in the Zn and Zn+Herbs groups than the Control group (P < 0.05). The relative abundances of Ruminococcus albus, R. flavefaciens, Streptococcus bovis, and Butyrivibrio proteoclasticus shifted in the Zn group. Morphological observation found a focally mixed infiltration of inflammatory cells in the lamina propria of the rumen in the Zn+Herbs group. The effect of the organic zinc and the herbal mixture on the parameters of ruminal fermentation in vitro was not confirmed in vivo, perhaps because the ruminal microbiota of the lambs adapted to the zinc-supplemented diets. Long-term supplementation of a diet combining zinc and medicinal herbs, however, may negatively affect the health of the ruminal epithelium of lambs.

scholarly journals In Vitro and in Vivo Tenocyte-protective Effectiveness of Dehydroepiandrosterone Against High Glucose-induced Oxidative Stress

2021 ◽  
Author(s):  
Shintaro Mukohara ◽  
Yutaka Mifune ◽  
Atsuyuki Inui ◽  
Hanako Nishimoto ◽  
Takashi Kurosawa ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Matrix Metalloproteinase ◽  
Protein Expression ◽  
Achilles Tendon ◽  
Mrna Expression ◽  
High Glucose ◽  
Control Group ◽  
Type I

Abstract BackgroundDehydroepiandrosterone (DHEA), an adrenal steroid, has a protective role against diabetes. The aim of this study was to investigate the in vitro and in vivo protective effects of DHEA against high glucose-induced oxidative stress in tenocytes and tendons. Methods In an in vitro study, tenocytes from normal Sprague-Dawley rats were cultured in low-glucose (LG) or high-glucose (HG) medium with or without DHEA. The experimental groups were: control group (LG without DHEA), LG with DHEA, HG without DHEA, and HG with DHEA. Reactive oxygen species (ROS) production, apoptosis, and messenger RNA (mRNA) expression of NADPH oxidase (NOX) 1 and 4, and interleukin-6 (IL-6) were determined. In the in vivo study, diabetic rats were divided into a control group and a DHEA-injected group (DHEA group). NOX1 and NOX4 protein expression and mRNA expression of NOX1, NOX4, IL-6, matrix metalloproteinase (MMP)-2, tissue inhibitors of matrix metalloproteinase (TIMP)-2, and type I and III collagens in the Achilles tendon were determined. Results In rat tenocytes, DHEA decreased the expression of NOX1 and IL-6, ROS accumulation, and apoptotic cells. In the diabetic rat Achilles tendon, NOX1 protein expression and mRNA expression of NOX1, IL-6, MMP-2, TIMP-2, and type III collagen were significantly lower, while type I collagen expression was significantly lower in the DHEA group.Conclusions DHEA showed antioxidant and anti-inflammatory effects both in vitro and in vivo. Moreover, DHEA improved tendon matrix synthesis and turnover which are affected by hyperglycemic conditions. DHEA could be a preventive drug for the diabetic tendinopathy.

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