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1.
Deep sea minerals prolong life span of streptozotocin‐induced diabetic rats by compensatory augmentation of the IGF‐I‐survival signaling and inhibition of apoptosis
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Hung‐En Liao Marthandam Asokan Shibu Wei‐Wen Kuo Pei‐Ying Pai Tsung‐Jung Ho Chia‐Hua Kuo Jing‐Ying Lin Su‐Ying Wen Vijaya Padma Viswanadha Chih‐Yang Huang 《Environmental toxicology》2016,31(7):769-781
Consumption of deep sea minerals (DSM), such as magnesium, calcium, and potassium, is known to reduce hypercholesterolemia‐induced myocardial hypertrophy and cardiac‐apoptosis and provide protection against cardiovascular diseases. Heart diseases develop as a lethal complication among diabetic patients usually due to hyperglycemia‐induced cardiac‐apoptosis that causes severe cardiac‐damages, heart failure, and reduced life expectancy. In this study, we investigated the potential of DSM and its related cardio‐protection to increase the life expectancy in diabetic rats. In this study, a heart failure rat model was developed by using streptozotocin (65 mg kg?1) IP injection. Different doses of DSM‐1× (37 mg kg?1 day?1), 2× (74 mg kg?1 day?1) and 3× (111 mg kg?1 day?1), were administered to the rats through gavages for 4 weeks. The positive effects of DSM on the survival rate of diabetes rats were determined with respect to the corresponding effects of MgSO4. Further, to understand the mechanism by which DSM enhances the survival of diabetic rats, their potential to regulate cardiac‐apoptosis and control cardiac‐dysfunction were examined. Echocardiogram, tissue staining, TUNEL assay, and Western blotting assay were used to investigate modulations in the myocardial contractile function and related signaling protein expression. The results showed that DSM regulate apoptosis and complement the cardiomyocyte proliferation by enhancing survival mechanisms. Moreover DSM significantly reduced the mortality rate and enhanced the survival rate of diabetic rats. Experimental results show that DSM administration can be an effective strategy to improve the life expectancy of diabetic subjects by improving cardiac‐cell proliferation and by controlling cardiac‐apoptosis and associated cardiac‐dysfunction. © 2015 Wiley Periodicals, Inc. Environ Toxicol 31: 769–781, 2016. 相似文献
2.
Tiron ameliorates high glucose‐induced cardiac myocyte apoptosis by PKCδ‐dependent inhibition of osteopontin
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Hong Qiu Xianqi Yi Yemin Zhang Yingkang Cao Bo Zhao Zhongyuan Xia Changhua Wang 《Clinical and experimental pharmacology & physiology》2017,44(7):760-770
Tiron functions as an effective antioxidant alleviating the intracellular reactive oxygen species (ROS) or the acute toxic metal overload. Previous studies have shown that cardiac myocyte apoptosis can be effectively inhibited by tiron administration in streptozotocin (STZ)‐induced diabetic rats, primary neonatal rat cardiomyocytes (NRVMs), and H9c2 embryonic rat cardiomyocytes. However, the underlying signalling mechanism is ill‐defined. In the present study, we found that tiron supplementation significantly inhibited apoptosis of high glucose (HG)‐treated NRVMs and the left ventricular cardiomyocytes from STZ‐diabetic rat, accompanied with a reduction of osteopontin (OPN) levels as well as an inhibition of PKCδ phosphorylation. OPN knockdown protected NRVMs against HG‐induced cell apoptosis. In addition, genetic inhibition of PKCδ mitigated HG‐stimulated enhancement of intracellular OPN levels in NRVMs. These findings indicate that ROS‐mediated activation of PKCδ upregulated OPN expression, leading to cardiac myocyte apoptosis. Interfering with ROS/PKCδ pathway by antioxidants such as tiron provides an optional therapeutic strategy for treatment and prevention of apoptosis‐related cardiovascular diseases including diabetic cardiomyopathy. 相似文献
3.
Kuan‐Ho Lin Shibu Marthandam Asokan Wei‐Wen Kuo You‐Liang Hsieh Chong‐Kuei Lii Vijayapadma Viswanadha Yi‐Lin Lin Shulin Wang Caixian Yang Chih‐Yang Huang 《Environmental toxicology》2020,35(6):707-713
Excessive intake of high fat diet (HFD) and associated obese conditions are critical contributors of cardiac diseases. In this study, an active metabolite andrographolide from Andrographis paniculata was found to ameliorate HFD‐induced cardiac apoptosis. C57/BL6 mouse were grouped as control (n = 9), obese (n = 8), low dose (25 mg/kg/d) andrographolide treatment (n = 9), and high dose (50 mg/kg/d) andrographolide treatment (n = 9). The control group was provided with standard laboratory chow and the other groups were fed with HFD. Andrographolide was administered through oral gavage for 1 week. Histopathological analysis showed increase in apoptotic nuclei and considerable cardiac‐damages in the obese group signifying cardiac remodeling effects. Further, Western blot results showed increase in pro‐apoptotic proteins and decrease in the proteins of IGF‐1R‐survival signaling. However, feeding of andrographolide significantly reduced the cardiac effects of HFD. The results strongly suggest that andrographolide supplementation can be used for prevention and treatment of cardiovascular disease in obese patients. 相似文献
4.
Xiang Peng Haiyan Su Dali Liang Jeihua Li Wei‐Jen Ting Shih‐Chieh Liao Chih‐Yang Huang 《Environmental toxicology》2019,34(7):861-868
Clinical studies have shown that hyperglycemia can induce early‐stage diabetic nephropathy (DN). Furthermore, oxidative stress, tubular epithelial‐mesenchymal transition and extracellular matrix accumulation promote the progression of DN to chronic kidney disease and tubulointerstitial fibrosis. It is necessary to initiate treatment at the early stages of DN or even during the early stages of diabetes. In this work, rats with streptozotocin (STZ)‐induced diabetes mellitus (DM) presented early DN symptoms within 45 days, and collagen accumulation in the glomerulus of the rats was primarily mediated through the RhoA/ROCK pathway instead of the TGF‐β signaling pathway. Resveratrol (15 mg/kg/day) and ramipril (10 mg/kg/day) co‐treatment of STZ‐induced DN rats showed that glomerulosclerosis in early‐stage DN was reversible (P < .05 compared with that in STZ‐induced DM rats). The results of this study support early intervention in diabetes or DN as a more efficient therapeutic strategy. 相似文献
5.
Pei‐Chen Huang Marthandam Asokan Shibu Chia‐Hua Kuo Chien‐Kuo Han Yueh‐Sheng Chen Feng‐Yueh Lo Heng Li Vijaya Padma Viswanadha Chao‐Hung Lai Xudong Li Chih‐Yang Huang 《Environmental toxicology》2019,34(8):921-927
Hyperkalemia is often associated with cardiac dysfunction. In this study an earthworm extract (dilong) was prepared from dried Pheretima aspergillum powder and its effect against high‐KCl challenge was determined in H9c2 cardiomyoblast cells. H9c2 cells pre‐treated with dilong (31.25, 62.5, 125, and 250 mg/mL) for 24 hours, where challenged with different doses of KCl treatment for 3 hours to determine the protective mechanisms of dilong against cardiac fibrosis. High‐KCl administration induced mitochondrial injury and elevated the levels of pro‐apoptotic proteins. The mediators of fibrosis such as ERK, uPA, SP1, and CTGF were also found to be upregulated in high‐KCl condition. However, dilong treatment enhanced IGF1R/PI3k/Akt activation which is associated with cell survival. In addition, dilong also reversed high‐KCl induced cardiac fibrosis related events in H9c2 cells and displayed a strong cardio‐protective effect. Therefore, dilong is a potential agent to overcome cardiac events associated with high‐KCl toxicity. 相似文献
6.
Yingxiao Li Kai‐Chun Cheng Akihiro Asakawa Haruka Amitani Yoshiyuki Takimoto Joshua Runtuwene Akio Inui 《Clinical and experimental pharmacology & physiology》2015,42(9):964-971
Agmatine, an endogenous ligand of imidazoline receptors, is reported to exhibit anti‐hyperglycaemic and many other effects. It has been established that the imidazoline I3 receptor is involved in insulin secretion. The current study characterizes the role of the imidazoline I3 receptor in the protection of pancreatic islets. The activity effect of agmatine against on streptozotocin (STZ)‐induced (5 mmol/L) rat β cell apoptosis was examined by using ApoTox‐Glo triplex assay, live/dead cell double staining assay, flow cytometric analysis, and western blot. Imidazoline I3 receptors antagonist KU14R and the phospholipase C inhibitor named U73122 were treated in β cells to investigate the potential signalling pathways. The serum glucose and recovery of insulin secretion were measured in STZ‐treated rats after continuously injected agmatine. The apoptosis in rat β cells was reduced by agmatine in a dose‐dependent manner, cell viability was improved after treatment with agmatine and these effects were suppressed after the blockade of KU14R and U73122. Western blot analysis confirmed that agmatine could decrease caspase‐3 expression and increase the p‐BAD levels. In STZ‐treated rats, injection of agmatine for 4 weeks may significantly lower the serum glucose and recovery of insulin secretion. This improvement of pancreatic islets induced by agmatine was deleted by KU14R in vivo. Agmatine can activate the imidazoline I3 receptor linked with the phospholipase C pathway to induce cell protection against apoptosis induced by a low dose of STZ. This finding provides new insight into the prevention of early stage pancreatic islet damage. 相似文献
7.
Comparison of the cardioprotective and renoprotective effects of the L/N‐type calcium channel blocker,cilnidipine, in adriamycin‐treated spontaneously‐hypertensive rats
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Shizuka Aritomi Eri Harada Kazumi Sugino Mai Nishimura Tarou Nakamura Akira Takahara 《Clinical and experimental pharmacology & physiology》2015,42(4):344-352
Cilnidipine is an L/N‐type calcium channel blocker (CCB). The effects of cilnidipine on N‐type channels give it unique organ‐protective properties via the suppression of hyperactivity in the sympathetic nervous system (SNS) and renin‐angiotensin‐aldosterone system (RAAS). In the present study, we compared the effects of cilnidipine and amlodipine (an L‐type CCB) on cardiac and renal functions in spontaneously‐hypertensive rats injected with adriamycin (ADR). After the weekly administration of ADR for 3 weeks, spontaneously‐hypertensive rats were orally administered cilnidipine (20 mg/kg per day), amlodipine (3 mg/kg per day), or vehicle once daily for 4 weeks. A control group received saline rather than ADR, followed by vehicle for 4 weeks. Cilnidipine and amlodipine produced similar reductions in blood pressure after 4 weeks. Cilnidipine ameliorated ADR‐induced heart and kidney damage, whereas amlodipine slightly improved cardiac echocardiographic parameters, but did not protect against ADR‐induced renal damage. Cilnidipine (but not amlodipine) suppressed the reflex SNS and RAAS hyperactivity caused by their antihypertensive effects. Furthermore, cilnidipine and amlodipine treatment decreased the urinary levels of adrenocortical hormones. The protective effects of cilnidipine against ADR‐induced renal and cardiac dysfunction might be associated with its blockade of N‐type calcium channels, in addition to its pleiotropic actions, which include the inhibition of the RAAS. 相似文献
8.
9.
Fisetin‐induced apoptosis of human oral cancer SCC‐4 cells through reactive oxygen species production,endoplasmic reticulum stress,caspase‐, and mitochondria‐dependent signaling pathways
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Chen‐Hsuan Su Chao‐Lin Kuo Kung‐Wen Lu Fu‐Shun Yu Yi‐Shih Ma Jiun‐Long Yang Yung‐Lin Chu Fu‐Shin Chueh Kuo‐Ching Liu Jing‐Gung Chung 《Environmental toxicology》2017,32(6):1725-1741
Oral cancer is one of the cancer‐related diseases in human populations and its incidence rates are rising worldwide. Fisetin, a flavonoid from natural products, has been shown to exhibit anticancer activities in many human cancer cell lines but the molecular mechanism of fisetin‐induced apoptosis in human oral cancer cells is still unclear; thus, in this study, we investigated fisetin‐induced cell death and associated signal pathways on human oral cancer SCC‐4 cells in vitro. We examined cell morphological changes, total viable cells, and cell cycle distribution by phase contrast microscopy and flow cytometry assays. Reactive oxygen species (ROS), Ca2+, mitochondria membrane potential (ΔΨm), and caspase‐8, ‐9, and ‐3 activities were also measured by flow cytometer. Results indicate that fisetin induced cell death through the cell morphological changes, caused G2/M phase arrest, induction of apoptosis, promoted ROS and Ca2+ production, and decreased the level of ΔΨm and increased caspase‐3, ‐8, and ‐9 activities in SCC‐4 cells. DAPI staining and DNA gel electrophoresis were also used to confirm fisetin‐induced cell apoptosis in SCC‐4 cells. Western blotting also found out that Fisetin increased the proapoptotic proteins such as Bax and Bid and decreased the antiapoptotic proteins such as Bcl‐2. Furthermore, results also showed that Fisetin increased the cytochrome c, AIF, and Endo G release from mitochondria in SCC‐4 cells. We also used ATF‐6α, ATF‐6β, GADD153, and GRP78 which indicated that fisetin induced cell death through ER stress. Based on those observations, we suggest that fisetin induced cell apoptosis through ER stress, mitochondria‐, and caspase‐dependent pathways. 相似文献
10.
Deep sea minerals ameliorate diabetic‐induced inflammation via inhibition of TNFα signaling pathways
Chieh‐Hsiang Lu Hsiu‐Chung Ou Cecilia‐Hsuan Day Hsiu‐I Chen Pei‐Ying Pai Cheng‐Yu Lee Ray‐Jade Chen Ruey‐Lin Chang Vijaya PadmaViswanadha Dennis Jine‐Yuan Hsieh Chih‐Yang Huang 《Environmental toxicology》2020,35(4):468-477
It has been well‐documented that the consumption of deep sea water (DSW) has beneficial effects on myocardial hypertrophy and cardiac apoptosis induced by hypercholesterolemia. However, the molecular mechanisms for the anti‐inflammatory effects of DSW on diabetic cardiomyopathy are still largely unclear. The main purpose of this present study was to test the hypothesis that DSW exerts anti‐inflammatory effects through the suppression of the TNF‐α‐mediated signaling pathways. IP injection of streptozotocin (STZ) at the dose of 65 mg/kg was used to establish a diabetes rat model. DSW mineral extracts that diluted in desalinated water were prepared in three different dosages and administered to the rats through gavages for 4 weeks. These dosages are DSW‐1X (equivalent to 37 mg Mg2+/kg/day), 2X (equivalent to 74 mg Mg2+/kg/day) and 3X (equivalent to 111 mg Mg2+ mg/kg/day). Immunofluorescence staining and Western blot showed that the protein expression level of TNF‐α was markedly higher in the STZ‐induced diabetic rat hearts than in the control group. Consequently, the phosphorylation levels of the TNF‐α‐modulated downstream signaling molecules and P38 mitogen‐activated protein kinases (MAPKs) were notably elevated in heart tissues of STZ‐induced diabetes. These higher phosphorylation levels subsequently upregulated NF‐κB‐modulated inflammatory mediators, such as cyclooxygenase (COX)‐II and inducible nitric oxide synthase (iNOS). However, treatment with DSW as well as MgSO4, the main mineral in DSW, significantly reversed all the alterations. These findings suggest that DSW has potential as a therapeutic agent for preventing diabetes‐related cardiovascular diseases. 相似文献
11.
Pei‐Yu Chen Chien‐Wen Hou Marthandam Asokan Shibu Cecilia Hsuan Day Peiying Pai Zhao‐Rong Liu Tze‐Yi Lin Vijaya Padma Viswanadha Chia‐Hua Kuo Chih‐Yang Huang 《Environmental toxicology》2017,32(2):679-689
Q10 is a powerful antioxidant often used in medical nutritional supplements for cancer treatment. This study determined whether Q10 could effectively prevent cardio‐toxicity caused by doxorubicin treatment. Four week old SD rats were segregated into groups namely control, doxorubicin group (challenged with doxorubicin), Dox + Q10 group (with doxorubicin challenge and oral Q10 treatment), and Q10 group (with oral Q10 treatment). Doxorubicin groups received IP doxorubicin (2.5 mg/kg) every 3 days and Q10 groups received Q10 (10 mg/kg) every day. Three weeks of doxorubicin challenge caused significant reduction in heart weight, disarray in cardiomyocyte arrangement, elevation of collagen accumulation, enhancement of fibrosis and cell death associated proteins, and inhibition of survival proteins. However, Q10 effectively protected cardiomyocytes and ameliorated fibrosis and cell death induced by doxorubicin. Q10 is, therefore, evidently a potential drug to prevent heart damage caused by doxorubicin. © 2016 Wiley Periodicals, Inc. Environ Toxicol 32: 679–689, 2017. 相似文献
12.
Zhong-wei Liu Jun-kui Wang Chuan Qiu Gong-chang Guan Xin-hong Liu Shang-jian Li Zheng-rong Deng 《Acta pharmacologica Sinica》2015,36(3):323-333
Aim:
Matrine is an alkaloid from Sophora alopecuroides L, which has shown a variety of pharmacological activities and potential therapeutic value in cardiovascular diseases. In this study we examined the protective effects of matrine against diabetic cardiomyopathy (DCM) in rats.Methods:
Male SD rats were injected with streptozotocin (STZ) to induce DCM. One group of DCM rats was pretreated with matrine (200 mg·kg−1·d−1, po) for 10 consecutive days before STZ injection. Left ventricular function was evaluated using invasive hemodynamic examination, and myocardiac apoptosis was assessed. Primary rat myocytes were used for in vitro experiments. Intracellular ROS generation, MDA content and GPx activity were determined. Real-time PCR and Western blotting were performed to detect the expression of relevant mRNAs and proteins.Results:
DCM rats exhibited abnormally elevated non-fasting blood glucose levels at 4 weeks after STZ injection, and LV function impairment at 16 weeks. The cardiac tissues of DCM rats showed markedly increased apoptosis, excessive ROS production, and activation of TLR-4/MyD-88/caspase-8/caspase-3 signaling. Pretreatment with matrine significantly decreased non-fasting blood glucose levels and improved LV function in DCM rats, which were associated with reducing apoptosis and ROS production, and suppressing TLR-4/MyD-88/caspase-8/caspase-3 signaling in cardiac tissues. Incubation in a high-glucose medium induced oxidative stress and activation of TLR-4/MyD-88 signaling in cultured myocytes in vitro, which were significantly attenuated by pretreatment with N-acetylcysteine.Conclusion:
Excessive ROS production in DCM activates the TLR-4/MyD-88 signaling, resulting in cardiomyocyte apoptosis, whereas pretreatment with matrine improves cardiac function via suppressing ROS/TLR-4 signaling pathway. 相似文献13.
New 1,4‐Dihydropyridines Down‐regulate Nitric Oxide in Animals with Streptozotocin‐induced Diabetes Mellitus and Protect Deoxyribonucleic Acid against Peroxynitrite Action
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Elina Leonova Jelizaveta Sokolovska Jean‐Luc Boucher Sergejs Isajevs Evita Rostoka Larisa Baumane Tatjana Sjakste Nikolajs Sjakste 《Basic & clinical pharmacology & toxicology》2016,119(1):19-31
Diabetes mellitus (DM) and its complications cause numerous health and social problems throughout the world. Pathogenic actions of nitric oxide (NO) are responsible to a large extent for development of complications of DM. Search for compounds regulating NO production in patients with DM is thus important for the development of pharmacological drugs. Dihydropyridines (1,4‐DHPs) are prospective compounds from this point of view. The goals of this study were to study the in vivo effects of new DHPs on NO and reactive nitrogen and oxygen species production in a streptozotocin (STZ)‐induced model of DM in rats and to study their ability to protect DNA against nocive action of peroxynitrite. STZ‐induced diabetes caused an increase in NO production in the liver, kidneys, blood and muscles, but a decrease in NO in adipose tissue of STZ‐treated animals. Cerebrocrast treatment was followed by normalization of NO production in the liver, kidneys and blood. Two other DHPs, etaftorone and fenoftorone, were effective in decreasing NO production in kidneys, blood and muscles of diabetic animals. Furthermore, inhibitors of nitric oxide synthase (NOS) and an inhibitor of xanthine oxidoreductase (XOR) decreased NO production in kidneys of diabetic animals. Treatment with etaftorone decreased expression of inducible NOS and XOR in kidneys, whereas it increased the expression of endothelial NOS. In vitro, the studied DHPs did not significantly inhibit the activities of NOS and XOR but affected the reactivity of peroxynitrite with DNA. These new DHPs thus appear of strong interest for treatment of DM complications. 相似文献
14.
Melatonin attenuates 60Co γ‐ray‐induced hematopoietic,immunological and gastrointestinal injuries in C57BL/6 male mice
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Shahanshah Khan Jawahar Singh Adhikari Moshahid Alam Rizvi Nabo Kumar Chaudhury 《Environmental toxicology》2017,32(2):501-518
Protection of hematopoietic, immunological, and gastrointestinal injuries from deleterious effects of ionizing radiation is prime rational for developing radioprotector. The objective of this study, therefore, was to evaluate the radioprotective potential of melatonin against damaging effects of radiation‐induced hematopoietic, immunological, and gastrointestinal injuries in mice. C57BL/6 male mice were intraperitoneally administered with melatonin (50–150 mg/kg) 30 min prior to whole‐body radiation exposure of 5 and 7.5 Gy using 60Co‐teletherapy unit. Thirty‐day survival against 7.5 Gy was monitored. Melatonin (100 mg/kg) pretreatment showed 100% survival against 7.5 Gy radiation dose. Melatonin pretreatment expanded femoral HPSCs, and inhibited spleenocyte DNA strands breaks and apoptosis in irradiated mice. At this time, it also protected radiation‐induced loss of T cell sub‐populations in spleen. In addition, melatonin pretreatment enhanced crypts regeneration and increased villi number and length in irradiated mice. Translocation of gut bacteria to spleen, liver and kidney were controlled in irradiated mice pretreated with melatonin. Radiation‐induced gastrointestinal DNA strand breaks, lipid peroxidation, and expression of proapoptotic‐p53, Bax, and antiapoptotic‐Bcl‐xL proteins were reversed in melatonin pretreated mice. This increase of Bcl‐xL was associated with the decrease of Bax/Bcl‐xL ratio. ABTS and DPPH radical assays revealed that melatonin treatment alleviated total antioxidant capacity in hematopoietic and gastrointestinal tissues. Present study demonstrated that melatonin pretreatment was able to prevent hematopoietic, immunological, and gastrointestinal radiation‐induced injury, therefore, overcoming lethality in mice. These results suggest potential of melatonin in developing radioprotector for protection of bone marrow, spleen, and gastrointestine in planned radiation exposure scenarios including radiotherapy. © 2016 Wiley Periodicals, Inc. Environ Toxicol 32: 501–518, 2017. 相似文献
15.
Yung‐Ming Chang K. Ashok Kumar Da‐Tong Ju Tsung‐Jung Ho B. Mahalakshmi Wan‐Teng Lin Cecilia H. Day V. Vijaya Padma Po‐Hsiang Liao Chih‐Yang Huang 《Environmental toxicology》2020,35(5):570-581
Hypertension (HTN) is one of the most prevalent chronic conditions; it can damage blood vessels and rupture blood vessels can trap in small vessels. This blockage can prevent blood flow and oxygen delivery to brain cells and can result in Alzheimer's disease (AD). HTN‐ and AD‐mediated long‐time memory loss and its treatment remain poorly understood. Plant‐derived natural compounds are alternative solutions for effectively treating diseases without any side effects. This study revealed that bioactive peptides extracted from potato hydrolysis suppress HTN‐mediated long‐term memory (LTM) loss and cell apoptosis, thus improving memory formation and neuronal cell survival in the spontaneously hypertensive rat (SHR) rat model. SHR rats were treated with bioactive peptide IF (10 mg/kg orally) and angiotensin‐converting enzyme inhibitors (5 mg/kg orally). In this study, we evaluated the molecular expression levels of BDNF‐, GluR1‐, and CREB‐mediated markers protein expression in 24‐week‐old SHR rats. The study result showed that HTN‐induced AD regulated long‐term memory (LTM) loss and neuronal degeneration in the SHR animals. The bioactive peptide‐treated animals showed an elevated level of survival proteins. Bioactive peptide IF activate CREB‐mediated downstream proteins to regulate synaptic plasticity and neuronal survival in the SHR rat model. 相似文献
16.
Doxorubicin (DOX)‐induced cardiomyopathy is a lethal disease. DOX‐induced cardiotoxic effects are attributed towards increased redox status and apoptotic signaling. In this study, we show that genistein offers protection against DOX‐induced cardio toxicity in the mice model. DOX‐mediated increase in serum cardiac troponin and redox markers (ROS, LPO, 4‐hydroxynonenal‐protein adducts [HNE] levels) was significantly reduced by genistein treatment. Significantly increased TNF‐α, IL‐6, IL‐8 expressions during DOX‐induced inflammatory responses were down regulated by genistein treatment. Further, we found that genistein regulated antioxidant response through increased Nrf‐2, HO‐1, NQO1 protein expressions. In addition, DOX downregulated survival proteins (p‐Akt, Bcl‐2) with concomitant upregulation in Erk (1/2), Bax and cleaved caspase‐3 expressions. The apoptotic activation was significantly downregulated by genistein treatment through suppression of apoptosis. Altogether, these findings show that genistein protects against DOX‐induced cardiotoxic effects through activation of Nrf‐2/HO‐1 signaling. 相似文献
17.
Novel Pentapeptide GLP‐1 (32–36) Amide Inhibits β‐Cell Apoptosis In Vitro and Improves Glucose Disposal in Streptozotocin‐Induced Diabetic Mice
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Lidan Sun Yuxuan Dai Chuandong Wang Yingying Chu Xin Su Jianyong Yang Jie Zhou Wenlong Huang Hai Qian 《Chemical biology & drug design》2015,86(6):1482-1490
We proposed that a pentapeptide, LVKGR amide, GLP‐1 (32–36) amide, derived from the gluco‐incretin hormone, glucagon‐like peptide‐1 (GLP‐1), might possess favorable actions against diabetes. Therefore, GLP‐1 (32–36) amide was synthesized and the effects of it were examined in INS‐1 cell and streptozotocin‐induced diabetic mice model. To determine the protective effects of GLP‐1 (32–36) amide on INS‐1 cell viability and apoptosis, cells were exposed to 1 μm streptozotocin (STZ) and GLP‐1 (32–36) amide for 24 h. Results showed that GLP‐1 (32–36) amide treatment decreased apoptosis rate and significantly retained cell viability compared with saline‐treated controls. Then, GLP‐1 (32–36) amide was administered intraperitoneally to streptozotocin‐induced diabetic mice with normal mice used as control. Body weight, energy intake, plasma glucose, and histopathology of the pancreas were assessed. Results showed that GLP‐1 (32–36) amide protected β‐cell viability and apoptosis against STZ‐induced toxicity, inhibited weight gain, and relieved symptoms of polydipsia. Moreover, GLP‐1 pentapeptide‐treated mice showed a slight trend toward reduced glucose excursions in intraperitoneal glucose tolerance test at the end of the experiment. GLP‐1 (32–36) amide exerted favorable protective actions in streptozotocin‐induced diabetic mice. The peptide curtailed weight gain and alleviates symptoms of polydipsia. These findings suggested the probable utility of GLP‐1 (32–36) amide, a peptide mimetic derived there from GLP‐1, for adjuvant treatment of diabetes. 相似文献
18.
GABA tea attenuates cardiac apoptosis in spontaneously hypertensive rats (SHR) by enhancing PI3K/Akt‐mediated survival pathway and suppressing Bax/Bak dependent apoptotic pathway
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Bih‐Cheng Chen Meng‐Yu Hung Hsueh‐Fang Wang Li‐Jen Yeh Sudhir Pandey Ray‐Jade Chen Ruey‐Lin Chang Vijaya Padma Viswanadha Kuan‐Ho Lin Chih‐Yang Huang 《Environmental toxicology》2018,33(7):789-797
Cardiomyocyte apoptosis is the major risk factor for the development of heart failure (HF). The purpose of this study was to evaluate the effects of Gamma‐aminobutyric acid (GABA) tea on hypertension‐induced cardiac apoptotic pathways in spontaneously hypertensive rats (SHR). In order to reveal the mechanisms, 36 male SHR at eight weeks of age, 200 g were divided into six groups. One group was fed water as a control group. Other rats were administered one of the following treatments: GABA tea at dose 150 and 300 mg/kg/day as low GABA tea (LGT) and high GABA tea (HGT) groups, respectively, pure GABA at dose 150 and 300 mg/kg/day as LG and HG groups, respectively, green tea (GT) as control of LGT and HGT groups. After 12 weeks, cardiac tissues were analyzed by histological analysis, western blotting, and TUNEL assays. GABA tea, GT, and pure GABA decreased hypertension‐induced cardiac abnormalities, including abnormal myocardial architecture. In addition, GABA tea, GT, and pure GABA dramatically increased anti‐apoptotic protein, Bcl2. Furthermore, GABA tea, GT, and pure GABA also decreased activated‐caspase 9 and activated‐caspase 3. Additionally, the survival associated protein IGF‐I and PI3K/Akt were enhanced in cardiac tissues upon treatment. Our results showed an optimistic anti‐apoptotic and pro‐survival effects of GABA tea treatment against hypertensive rat hearts. 相似文献
19.
Spinal cord injury (SCI) is the most commonly seen trauma leading to disability in people worldwide. The purpose of current study was to determine the protective effect of methoxytetrahydro‐2H‐pyran‐2‐yl)methyl benzoate (HMPB) on SCI in rat model. TUNEL staining was used to examine apoptotic changes in spinal cord of SCI rats. The ELISA kits were employed to assess inflammatory processes and oxidative factors in the spinal cord tissues. Behavioral changes in SCI rats were assessed using Basso, Beattie, and Bresnahan (BBB) scoring system. Western blotting was used for assessment of proteins. The HMPB treatment of SCI rats reduced apoptotic cell number based on the concentration of dose administered. Treatment of SCI rats with HMPB enhanced BBB score and decreased accumulation of water content in SCI rats significantly. On treatment with HMPB the TNF‐α and interleukin‐6/1β/18 levels were suppressed in SCI rats. Treatment with HMPB induced excessive release of SOD, CAT, and GSH molecules and decreased overproduction of MDA. The SCI induced upregulation of caspase‐3/9 activity was completely alleviated by HMPB at 2 mg/kg dose. The HMPB treatment of SCI rats promoted peroxisome proliferator‐activated receptor γ (PPAR‐γ) expression, reduced cyclooxygenase (COX)‐2 production and increased expression of p‐Akt and phosphoinositide 3‐kinase (p‐PI3K). The study demonstrated that HMPB suppressed apoptosis, raised BBB score and inhibited inflammation in SCI rats. Moreover, activation of PI3K/Akt in the spinal cord tissues of SCI rats was promoted by HMPB. Therefore, HMPB has protective effect on SCI in the rat model. 相似文献
20.
Hung‐Jen Lin Samiraj Ramesh Yung‐Ming Chang Chuan‐Te Tsai Chin‐Chuan Tsai Marthandam Asokan Shibu Shanmugam Tamilselvi B. Mahalakshmi Wei‐Wen Kuo Chih‐Yang Huang 《Environmental toxicology》2021,36(1):86-94
This study addresses the effect of D‐galactose‐induced toxicity associated senescence mitigated by alpinate oxyphyllae fructus (AOF; Alpinia oxyphylla Miq) extracts fortified with adipose‐derived mesenchymal stem cells (ADMSCs) in rats. Male 18 week‐old Wistar Kyoto (WKY) rats were used in this study. We analyzed cardiac fibrosis by Masson's trichrome staining. The tissue sections were dyed using hematoxylin and eosin (H&E). Tissue sections were stained for the restoration of Nrf2 expression in treatment groups by immunohistochemistry. Immunohistochemistry and western blotting analysis showed that AOF with ADMSCs could significantly reduce aging‐induced oxidative stress in D‐galactose‐induced aging rat hearts by inducing Nrf2 pathway. Reduction in ROS resulted in the suppression of inflammatory signals (p‐NF‐κB and IL‐6). Histopathological studies were showed an increased interstitium and collagen accumulation in aging‐induced heart sections. However, AOF and ADMSCs treated hearts were recovered from cardiac remodeling. Furthermore, hypertrophy and fibrosis associated markers were also significantly reduced (P < .05) in treatment groups. We speculate that ADMSCs might activate certain paracrine factors, which could target the upstream activator of aging associated cardiac complications and AOF might provide homing for these stem cells. 相似文献