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Ji L, Lou S, Fang Y, Wang X, Zhu W, Liang G, Lee K, Luo W, Zhuang Z. Patchouli Alcohol Protects the Heart against Diabetes-Related Cardiomyopathy through the JAK2/STAT3 Signaling Pathway. Pharmaceuticals (Basel) 2024; 17:631. [PMID: 38794201 PMCID: PMC11124524 DOI: 10.3390/ph17050631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 04/20/2024] [Accepted: 04/29/2024] [Indexed: 05/26/2024] Open
Abstract
Diabetic cardiomyopathy (DCM) represents a common pathological state brought about by diabetes mellitus (DM). Patchouli alcohol (PatA) is known for its diverse advantageous effects, notably its anti-inflammatory properties and protective role against metabolic disorders. Despite this, the influence of PatA on DCM remains relatively unexplored. To explore the effect of PatA on diabetes-induced cardiac injury and dysfunction in mice, streptozotocin (STZ) was used to mimic type 1 diabetes in mice. Serological markers and echocardiography show that PatA treatment protects the heart against cardiomyopathy by controlling myocardial fibrosis but not by reducing hyperglycemia in diabetic mice. Discovery Studio 2017 software was used to perform reverse target screening of PatA, and we found that JAK2 may be a potential target of PatA. RNA-seq analysis of heart tissues revealed that PatA activity in the myocardium was primarily associated with the inflammatory fibrosis through the Janus tyrosine kinase 2 (JAK2)/signal transducer and activator of the transcription 3 (STAT3) pathway. In vitro, we also found that PatA alleviates high glucose (HG) + palmitic acid (PA)-induced fibrotic and inflammatory responses via inhibiting the JAK2/STAT3 signaling pathway in H9C2 cells. Our findings illustrate that PatA mitigates the effects of HG + PA- or STZ-induced cardiomyopathy by acting on the JAK2/STAT3 signaling pathway. These insights indicate that PatA could potentially serve as a therapeutic agent for DCM treatment.
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Affiliation(s)
- Lijun Ji
- The Affiliated Cangnan Hospital and Chemical Biology Research Center, Wenzhou Medical University, Wenzhou 325000, China; (L.J.); (S.L.); (Y.F.); (X.W.); (W.Z.); (G.L.)
- College of Pharmacy, Chonnam National University, Gwangju 61186, Republic of Korea;
| | - Shuaijie Lou
- The Affiliated Cangnan Hospital and Chemical Biology Research Center, Wenzhou Medical University, Wenzhou 325000, China; (L.J.); (S.L.); (Y.F.); (X.W.); (W.Z.); (G.L.)
| | - Yi Fang
- The Affiliated Cangnan Hospital and Chemical Biology Research Center, Wenzhou Medical University, Wenzhou 325000, China; (L.J.); (S.L.); (Y.F.); (X.W.); (W.Z.); (G.L.)
| | - Xu Wang
- The Affiliated Cangnan Hospital and Chemical Biology Research Center, Wenzhou Medical University, Wenzhou 325000, China; (L.J.); (S.L.); (Y.F.); (X.W.); (W.Z.); (G.L.)
| | - Weiwei Zhu
- The Affiliated Cangnan Hospital and Chemical Biology Research Center, Wenzhou Medical University, Wenzhou 325000, China; (L.J.); (S.L.); (Y.F.); (X.W.); (W.Z.); (G.L.)
| | - Guang Liang
- The Affiliated Cangnan Hospital and Chemical Biology Research Center, Wenzhou Medical University, Wenzhou 325000, China; (L.J.); (S.L.); (Y.F.); (X.W.); (W.Z.); (G.L.)
- School of Pharmaceutical Sciences, Hangzhou Medical College, Hangzhou 311399, China
| | - Kwangyoul Lee
- College of Pharmacy, Chonnam National University, Gwangju 61186, Republic of Korea;
| | - Wu Luo
- The Affiliated Cangnan Hospital and Chemical Biology Research Center, Wenzhou Medical University, Wenzhou 325000, China; (L.J.); (S.L.); (Y.F.); (X.W.); (W.Z.); (G.L.)
- School of Pharmaceutical Sciences, Hangzhou Medical College, Hangzhou 311399, China
| | - Zaishou Zhuang
- The Affiliated Cangnan Hospital and Chemical Biology Research Center, Wenzhou Medical University, Wenzhou 325000, China; (L.J.); (S.L.); (Y.F.); (X.W.); (W.Z.); (G.L.)
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Law J, Orbach SM, Weston BR, Steele PA, Rajagopalan P, Murali TM. Computational Construction of Toxicant Signaling Networks. Chem Res Toxicol 2023; 36:1267-1277. [PMID: 37471124 PMCID: PMC10445288 DOI: 10.1021/acs.chemrestox.2c00422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Indexed: 07/21/2023]
Abstract
Humans and animals are regularly exposed to compounds that may have adverse effects on health. The Toxicity Forecaster (ToxCast) program was developed to use high throughput screening assays to quickly screen chemicals by measuring their effects on many biological end points. Many of these assays test for effects on cellular receptors and transcription factors (TFs), under the assumption that a toxicant may perturb normal signaling pathways in the cell. We hypothesized that we could reconstruct the intermediate proteins in these pathways that may be directly or indirectly affected by the toxicant, potentially revealing important physiological processes not yet tested for many chemicals. We integrate data from ToxCast with a human protein interactome to build toxicant signaling networks that contain physical and signaling protein interactions that may be affected as a result of toxicant exposure. To build these networks, we developed the EdgeLinker algorithm, which efficiently finds short paths in the interactome that connect the receptors to TFs for each toxicant. We performed multiple evaluations and found evidence suggesting that these signaling networks capture biologically relevant effects of toxicants. To aid in dissemination and interpretation, interactive visualizations of these networks are available at http://graphspace.org.
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Affiliation(s)
- Jeffrey
N. Law
- Interdisciplinary
Ph.D. Program in Genetics, Bioinformatics, and Computational Biology, Blacksburg, Virginia 24061, United States
| | - Sophia M. Orbach
- Department
of Chemical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Bronson R. Weston
- Interdisciplinary
Ph.D. Program in Genetics, Bioinformatics, and Computational Biology, Blacksburg, Virginia 24061, United States
| | - Peter A. Steele
- Department
of Computer Science, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Padmavathy Rajagopalan
- Department
of Chemical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - T. M. Murali
- Department
of Computer Science, Virginia Tech, Blacksburg, Virginia 24061, United States
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Liu J, Zhang Y, Liu M, Shi F, Cheng B. AG1024, an IGF-1 receptor inhibitor, ameliorates renal injury in rats with diabetic nephropathy via the SOCS/JAK2/STAT pathway. Open Med (Wars) 2023; 18:20230683. [PMID: 37034500 PMCID: PMC10080708 DOI: 10.1515/med-2023-0683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 02/22/2023] [Accepted: 03/02/2023] [Indexed: 04/11/2023] Open
Abstract
Insulin-like-growth factor-1 (IGF-1) is the ligand for insulin-like growth factor-1 receptor (IGF-1R), and the roles of IGF-1/IGF-1R in diabetic nephropathy (DN) are well-characterized previously. However, the biological functions of AG1024 (an IGF-1R inhibitor) in DN remain unknown. This study investigates the roles and related mechanisms of AG-1024 in DN. The experimental DN was established via intraperitoneal injection of streptozotocin, and STZ-induced diabetic rats were treated with AG1024 (20 mg/kg/day) for 8 weeks. The 24 h proteinuria, blood glucose level, serum creatinine, and blood urea nitrogen were measured for biochemical analyses. The increase in 24 h proteinuria, blood glucose level, serum creatinine, and blood urea of DN rats were conspicuously abated by AG1024. After biochemical analyses, the renal tissue specimens were collected, and as revealed by hematoxylin and eosin staining and Masson staining, AG-1024 mitigated typical renal damage and interstitial fibrosis in DN rats. Then, the anti-inflammatory effect of AG-1024 was assessed by western blotting and ELISA. Mechanistically, AG-1024 upregulated SOCS1 and SOCS3 expression and decreased phosphorylated JAK2, STAT1, and STAT3, as shown by western blotting. Collectively, AG-1024 (an IGF-1R inhibitor) ameliorates renal injury in experimental DN by attenuating renal inflammation and fibrosis via the SOCS/JAK2/STAT pathway.
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Affiliation(s)
- Jianhua Liu
- Department of Nephrology, The Sixth Hospital of Wuhan (Affiliated Hospital of Jianghan University), Wuhan 430015, Hubei, China
| | - Yun Zhang
- Department of Nephrology, The Sixth Hospital of Wuhan (Affiliated Hospital of Jianghan University), Wuhan 430015, Hubei, China
| | - Min Liu
- Department of Nephrology, The Sixth Hospital of Wuhan (Affiliated Hospital of Jianghan University), Wuhan 430015, Hubei, China
| | - Feng Shi
- Department of Nephrology, The Sixth Hospital of Wuhan (Affiliated Hospital of Jianghan University), Wuhan 430015, Hubei, China
| | - Bo Cheng
- Department of Nephrology, The Sixth Hospital of Wuhan (Affiliated Hospital of Jianghan University), No. 168, Hong Kong Road, Jiang’an District, Wuhan 430015, Hubei, China
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HAN N, SU Y, GUO M, YU L. Retinal SHP2 silencing alleviates diabetic retinopathy via suppressing inflammatory response and oxidative stress by regulating YAP1 activity. Exp Anim 2022; 71:376-384. [PMID: 35400714 PMCID: PMC9388342 DOI: 10.1538/expanim.21-0122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Diabetic retinopathy (DR) is the prevalent microvascular complication of diabetes mellitus (DM), and it may lead to permanent blindness. The previous publication has indicated that both
inflammatory response and oxidative stress are critical factors involved in DR progression, however, the accurate regulatory mechanism remains to be revealed. Src homology region 2
(SH2)-containing protein tyrosine phosphatase 2 (SHP2), a member of the protein tyrosine phosphatase family, was reported to play a role in diabetic nephropathy, whereas its function in DR
was unknown and required further exploration. The level of phosphorylated, not the total, SHP2 increased in the retinas of rats with streptozotocin injection-induced DM. Further, the
intravitreal injection of SHP2 shRNA lentivirus alleviated retinal pathological changes, and inhibited inflammatory response and oxidative stress, which were accompanied with Yes-associated
protein 1 (YAP1) deactivation in DR rats. Additional co-immunoprecipitation results confirmed the interaction of SHP2 and YAP1. Collectively, our data preliminarily show that DR
amelioration-induced by SHP2 inhibition in rats may attribute to the deactivation of YAP1 pathway.
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Affiliation(s)
- Ning HAN
- Department of Ophthalmology, The Second Hospital of Jilin University
| | - Ying SU
- Department of Ophthalmology, Liaoyuan People’s Hospital
| | - Mi GUO
- Department of Ophthalmology, Baotou Eye Hospital
| | - Li YU
- Department of Ophthalmology, The Second Hospital of Jilin University
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Liu S, Hu Y, Wang Y, Sun Y, Qin SL, Xu D. Endosulfan promotes cell proliferation and extracellular matrix accumulation through TGF-β/Smad signaling pathway in HRMCs. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 228:113040. [PMID: 34856488 DOI: 10.1016/j.ecoenv.2021.113040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 11/16/2021] [Accepted: 11/26/2021] [Indexed: 06/13/2023]
Abstract
Endosulfan is an organochlorine pesticide, which poses a potential danger to human health and safety. It is known that dysfunction of glomerular mesangial cells causes glomerular sclerosis, associated with chronic kidney diseases. In the present study, we investigated the effects of endosulfan on cell proliferation and extracellular matrix accumulation (ECM) in human renal mesangial cells (HRMCs). Cells were treated with endosulfan, endosulfan (10 μM) plus specific inhibitor of TGF-β signaling (LY2109761) or antioxidant (NAC). The results showed that endosulfan significantly promoted cell proliferation, accompanied with the decrease of p27 mRNA expression and the increase in the mRNA expression levels of p21 and inflammatory factors IL-6/IL-8. qRT-PCR results showed that matrix metalloproteinase-2 (MMP2) and tissue metalloproteinase-3 (TIMP3) were down-regulated whereas laminin was up-regulated when exposure to endosulfan. Western blot results showed that p-Smad2/3 was up-regulated, while Smad7 was down-regulated when exposure to endosulfan, which were reversed in the presence of LY2109761. Endosulfan significantly decreased the activity of SOD and increased the MDA level and CAT activity, which were reversed in the presence of NAC. These findings suggest that endosulfan can cause excessive proliferation and massive accumulation of ECM through TGF-β/Smad signaling pathway, and also induced oxidative stress and inflammation in HRMCs.
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Affiliation(s)
- Shiwen Liu
- Institute of Environmental Systems Biology, Environmental Science and Engineering College, Dalian Maritime University, #1 Linghai Road, 116026 Dalian, China.
| | - Yumeng Hu
- Institute of Environmental Systems Biology, Environmental Science and Engineering College, Dalian Maritime University, #1 Linghai Road, 116026 Dalian, China.
| | - Yue Wang
- Institute of Environmental Systems Biology, Environmental Science and Engineering College, Dalian Maritime University, #1 Linghai Road, 116026 Dalian, China.
| | - Yeqing Sun
- Institute of Environmental Systems Biology, Environmental Science and Engineering College, Dalian Maritime University, #1 Linghai Road, 116026 Dalian, China.
| | - Shu-Lan Qin
- Department of Endocrinology, The Fifth Affiliated Hospital, Southern Medical University, 510900 Guangzhou, China.
| | - Dan Xu
- Institute of Environmental Systems Biology, Environmental Science and Engineering College, Dalian Maritime University, #1 Linghai Road, 116026 Dalian, China.
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Liu Y, Xiao J, Zhao Y, Zhao C, Yang Q, Du X, Wang X. microRNA-216a protects against human retinal microvascular endothelial cell injury in diabetic retinopathy by suppressing the NOS2/JAK/STAT axis. Exp Mol Pathol 2020; 115:104445. [PMID: 32335083 DOI: 10.1016/j.yexmp.2020.104445] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 03/13/2020] [Accepted: 04/22/2020] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Since microRNAs (miRNAs) represent as effective therapeutic targets for diabetic retinopathy (DR), we identified aberrantly expressed miRNAs related to cellular dysfunction in DR and further detected their potential targets. This study aimed to explore the synergistic effect of miR-216a, inducible nitric oxide synthase 2 (NOS2) and the Janus kinase/signal transducer and activator of transcription (JAK/STAT) pathway on human retinal microvascular endothelial cell (HRMEC) injury in DR. METHODS The differentially expressed genes in DR were obtained by GEO database, and the downstream signaling pathways and upstream targeted miRNAs were obtained through bioinformatics analysis. Subsequently, a DR model rat was established, and the target miR-216a was overexpressed to observe the pathological and morphological changes of the rat retina and the levels of inflammatory factors. Then, HRMECs were extracted and added with d-Glucose, and then transfected with miR-216a, NOS2 or adding JAK/STAT signaling pathway specific inhibitor to observe changes in cell activity and inflammatory damage. RESULTS NOS2 was significantly upregulated, and the JAK/STAT signaling pathway was significantly activated in DR. miR-216a targeted NOS2, which played a protective role in the retina of DR rats. Moreover, in cell experiments, overexpression of miR-216a promoted the viability of HRMECs under d-glucose treatment, and inhibited NOS2 expression and the JAK/STAT signaling pathway activation. CONCLUSION This study suggests that miR-216a protects against HRMECs injury in DR by suppressing the NOS2/JAK/STAT axis.
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Affiliation(s)
- Yong Liu
- Department of Ophthalmology, Air Force Medical Center, PLA, Beijing 100142, PR China.
| | - Jianhe Xiao
- Department of Ophthalmology, NO.989 Hospital of the PLA Joint Logistics Support Force, Luoyang 471031, Henan, PR China
| | - Yanyan Zhao
- Department of Ophthalmology, Air Force Medical Center, PLA, Beijing 100142, PR China
| | - Chen Zhao
- Department of Ophthalmology, Air Force Medical Center, PLA, Beijing 100142, PR China
| | - Qinghong Yang
- Department of Ophthalmology, Air Force Medical Center, PLA, Beijing 100142, PR China
| | - Xianghong Du
- Department of Ophthalmology, Air Force Medical Center, PLA, Beijing 100142, PR China
| | - Xin Wang
- Department of Ophthalmology, Air Force Medical Center, PLA, Beijing 100142, PR China
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Li CD, Zhao JY, Chen JL, Lu JH, Zhang MB, Huang Q, Cao YN, Jia GL, Tao YX, Li J, Cao H. Mechanism of the JAK2/STAT3-CAV-1-NR2B signaling pathway in painful diabetic neuropathy. Endocrine 2019; 64:55-66. [PMID: 30830585 PMCID: PMC6453875 DOI: 10.1007/s12020-019-01880-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 02/22/2019] [Indexed: 12/30/2022]
Abstract
PURPOSE The aim of the present study was to further elucidate the role of JAK2/STAT3-CAV-1-NR2B on painful diabetic neuropathy. METHODS In vivo, the mechanical withdrawal threshold and thermal withdrawal latency were measured to evaluate neuropathic pain behaviors (n= 8), while western blot (n= 5) and an immunofluorescence double staining experiment (n= 6) were performed to understand the molecular mechanism. In vitro, the individual culture of BV2 mouse microglia cell lines, the co-culture of BV2 mouse microglia cell lines and PC12 rat neuron cell lines, and western blot analysis were performed to understand the molecular mechanism between microglia and neurons. RESULTS The expression of p-JAK2, p-STAT3, t-CAV-1, and p-NR2B was upregulated in the dorsal horn of DNP rats throughout the experiment. Through the immunofluorescence double staining experiment, it was found that p-STAT3 was mainly expressed in activated microglia, and this condition can be stably maintained for approximately 2 weeks after the establishment of the DNP model. The intrathecal injection of JAK2 inhibitor AG490 can relieve the abnormal expression of p-JAK2, p-STAT3, t-CAV-1, and p-NR2B, and relieve pain. The remission of AG490 began on the third day, and it could be stably sustained for 14 days. In vitro high-glucose induced the activation of p-STAT3 in microglia, thereby upregulating the expression of p-CAV-1 and p-NR2B in neurons in the co-culture system. JAK2 inhibitor AG490 can alleviate the abnormal expression of these proteins in the JAK2/STAT3-CAV-1-NR2B signaling pathway in vitro. CONCLUSIONS Microglial JAK2/STAT3 signaling probably contributes to neuropathic pain by activating the CAV-1-NR2B pathway.
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Affiliation(s)
- Chuan-Da Li
- Department of Anesthesiology, Second Affiliated Hospital of Wenzhou Medical University, Pain Medicine Institute of Wenzhou Medical University, 325035, Zhejiang, China
| | - Jia-Yi Zhao
- Department of Anesthesiology, Second Affiliated Hospital of Wenzhou Medical University, Pain Medicine Institute of Wenzhou Medical University, 325035, Zhejiang, China
| | - Jia-Li Chen
- Department of Anesthesiology, Second Affiliated Hospital of Wenzhou Medical University, Pain Medicine Institute of Wenzhou Medical University, 325035, Zhejiang, China
| | - Jia-Hui Lu
- Department of Anesthesiology, Second Affiliated Hospital of Wenzhou Medical University, Pain Medicine Institute of Wenzhou Medical University, 325035, Zhejiang, China
| | - Mao-Biao Zhang
- Department of Anesthesiology, Second Affiliated Hospital of Wenzhou Medical University, Pain Medicine Institute of Wenzhou Medical University, 325035, Zhejiang, China
| | - Qi Huang
- Department of Anesthesiology, Second Affiliated Hospital of Wenzhou Medical University, Pain Medicine Institute of Wenzhou Medical University, 325035, Zhejiang, China
| | - Yan-Nan Cao
- Department of Anesthesiology, Second Affiliated Hospital of Wenzhou Medical University, Pain Medicine Institute of Wenzhou Medical University, 325035, Zhejiang, China
| | - Gai-Li Jia
- Department of Anesthesiology, Second Affiliated Hospital of Wenzhou Medical University, Pain Medicine Institute of Wenzhou Medical University, 325035, Zhejiang, China
| | - Yuan-Xiang Tao
- Department of Anesthesiology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, 07103, USA
| | - Jun Li
- Department of Anesthesiology, Second Affiliated Hospital of Wenzhou Medical University, Pain Medicine Institute of Wenzhou Medical University, 325035, Zhejiang, China.
| | - Hong Cao
- Department of Anesthesiology, Second Affiliated Hospital of Wenzhou Medical University, Pain Medicine Institute of Wenzhou Medical University, 325035, Zhejiang, China.
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Duan WN, Xia ZY, Liu M, Sun Q, Lei SQ, Wu XJ, Meng QT, Leng Y. Protective effects of SOCS3 overexpression in high glucose‑induced lung epithelial cell injury through the JAK2/STAT3 pathway. Mol Med Rep 2017; 16:2668-2674. [PMID: 28713982 PMCID: PMC5547984 DOI: 10.3892/mmr.2017.6941] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 05/05/2017] [Indexed: 12/25/2022] Open
Abstract
Previous studies have suggested that the Janus kinase (JAK)/signal transducers and activators of transcription (STAT) pathway is involved in hyperglycemia-induced lung injury. The present study aimed to investigate the roles of suppressor of cytokine signaling3 (SOCS3) in the regulation of JAK2/STAT3 activation following high glucose (HG) treatment in A549 human pulmonary epithelial cells. Cell viability was evaluated using Cell Counting Kit-8 and lactate dehydrogenase assays. HG-induced inflammatory injury in A549 cells was assessed through the evaluation of interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) levels using ELISA. The protein expression levels of SOCS3, JAK2, STAT3, phosphorylated (p)-JAK2 and p-STAT3 were determined using western blot analysis. Cellular viability was significantly decreased, whereas IL-6 and TNF-α levels were significantly increased, following HG stimulation of A549 cells. In addition, the protein levels of SOCS3, p-JAK2 and p-STAT3 were significantly increased in HG-treated cells. Treatment with the JAK2/STAT3 inhibitor tyrphostin AG490, or SOCS3 overexpression, appeared to prevent the HG-induced alterations in protein expression. Furthermore, cellular viability was enhanced, whereas the levels of proinflammatory cytokines were suppressed. These finding suggested the involvement of the SOCS3/JAK2/STAT3 signaling pathway in HG-induced responses in lung cells. Therefore, it may be hypothesized that the inhibition of the JAK2/STAT3 pathway through SOCS3 overexpression may prevent hyperglycemia-induced lung injury, and may have therapeutic potential for the treatment of patients with diabetic lung injury.
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Affiliation(s)
- Wei-Na Duan
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Zhong-Yuan Xia
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Min Liu
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Qian Sun
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Shao-Qing Lei
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Xiao-Jing Wu
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Qing-Tao Meng
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Yan Leng
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
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Bhattacharjee N, Barma S, Konwar N, Dewanjee S, Manna P. Mechanistic insight of diabetic nephropathy and its pharmacotherapeutic targets: An update. Eur J Pharmacol 2016; 791:8-24. [PMID: 27568833 DOI: 10.1016/j.ejphar.2016.08.022] [Citation(s) in RCA: 170] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 08/03/2016] [Accepted: 08/24/2016] [Indexed: 02/09/2023]
Abstract
Diabetic nephropathy (DN), a chronic complication of diabetes, is charecterized by glomerular hypertrophy, proteinuria, decreased glomerular filtration, and renal fibrosis resulting in the loss of renal function. Although the exact cause of DN remains unclear, several mechanisms have been postulated, such as hyperglycemia-induced renal hyper filtration and renal injury, AGEs-induced increased oxidative stress, activated PKC-induced increased production of cytokines, chemokines, and different inflammatory and apoptotic signals. Among various factors, oxidative stress has been suggested to play a major role underlying the onset and propagation of DN. It triggers several signaling pathways involved in DN, like AGEs, PKC cascade, JAK/STAT signaling, MAPK, mTOR, and SMAD. Oxidative stress-induced activation of both inflammatory and apoptotic signals are two major problems in the pathogenesis of DN. The FDA approved pharmacotherapeutic agents affecting against polyol pathway principally include anti-oxidants, like α-lipoic acid, vitamin E, and vitamin C. Kremezin and benfotiamine are the FDA approved AGEs inhibitors, another therapeutic target against DN. Ruboxistaurin, telmizartan, rapamycin, fenofibrate, aliskiren, and manidipine are some FDA approved pharmacotherapeutics effective against DN via diverse mechanisms. Beside this, some therapeutic agents are still waiting for FDA approval and few drugs without FDA approval are also prescribed in some countries for the management of DN. Despite the medications available in the market to treat DN, the involvement of multiple mechanisms makes it difficult to choose an optimum therapeutic agent. Therefore, much research is required to find out new therapeutic agent/strategies for an adequate pharmacotherapy of DN.
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Affiliation(s)
- Niloy Bhattacharjee
- Advanced Pharmacognosy Research Laboratory, Department of Pharmaceutical Technology, Jadavpur University, Raja S C Mullick Road, Kolkata 700032, India
| | - Sujata Barma
- Advanced Pharmacognosy Research Laboratory, Department of Pharmaceutical Technology, Jadavpur University, Raja S C Mullick Road, Kolkata 700032, India
| | - Nandita Konwar
- Biological Science and Technology Division, CSIR-NEIST, Jorhat, Assam 785006, India
| | - Saikat Dewanjee
- Advanced Pharmacognosy Research Laboratory, Department of Pharmaceutical Technology, Jadavpur University, Raja S C Mullick Road, Kolkata 700032, India.
| | - Prasenjit Manna
- Biological Science and Technology Division, CSIR-NEIST, Jorhat, Assam 785006, India.
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Pecoraro V, Moja L, Dall'Olmo L, Cappellini G, Garattini S. Most appropriate animal models to study the efficacy of statins: a systematic review. Eur J Clin Invest 2014; 44:848-71. [PMID: 25066257 DOI: 10.1111/eci.12304] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Accepted: 07/21/2014] [Indexed: 12/21/2022]
Abstract
BACKGROUND In animal models and clinical trials, statins are reported as effective in reducing cholesterol levels and lowering the risk of cardiovascular diseases. We have aggregated the findings in animal models - mice, rats and rabbits - using the technique of systematic review and meta-analysis to highlight differences in the efficacy of statins. MATERIALS AND METHODS We searched Medline and Embase. After examining all eligible articles, we extracted results about total cholesterol and other blood parameters, blood pressure, myocardial infarction and survival. Weighted and standard mean difference random effects meta-analysis was used to measure overall efficacy in prespecified species, strains and subgroups. RESULTS We included in systematic review 161 animal studies and we analysed 120 studies, accounting for 2432 animals. Statins lowered the total cholesterol across all species, although with large differences in the effect size: -30% in rabbits, -20% in mice and -10% in rats. The reduction was larger in animals fed on a high-cholesterol diet. Statins reduced infarct volume but did not consistently reduce the blood pressure or effect the overall survival. Few studies considered strains at high risk of cardiovascular diseases or hard outcomes. CONCLUSIONS Although statins showed substantial efficacy in animal models, few preclinical data considered conditions mimicking human pathologies for which the drugs are clinically indicated and utilized. The empirical finding that statins are more effective in lowering cholesterol derived from an external source (i.e. diet) conflicts with statin's supposed primary mechanism of action.
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Affiliation(s)
- Valentina Pecoraro
- Clinical Epidemiology Unit, IRCCS Orthopedic Institute Galeazzi, Milan, Italy
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Abstract
The most problematic issue in clinical nephrology is the relentless and progressive increase in patients with ESRD (end-stage renal disease) worldwide. The impact of diabetic nephropathy on the increasing population with CKD (chronic kidney disease) and ESRD is enormous. Three major pathways showing abnormality of intracellular metabolism have been identified in the development of diabetic nephropathy: (i) the activation of polyol and PKC (protein kinase C) pathways; (ii) the formation of advanced glycation end-products; and (iii) intraglomerular hypertension induced by glomerular hyperfiltration. Upstream of these three major pathways, hyperglycaemia is the major driving force of the progression to ESRD from diabetic nephropathy. Downstream of the three pathways, microinflammation and subsequent extracellular matrix expansion are common pathways for the progression of diabetic nephropathy. In recent years, many researchers have been convinced that the inflammation pathways play central roles in the progression of diabetic nephropathy, and the identification of new inflammatory molecules may link to the development of new therapeutic strategies. Various molecules related to the inflammation pathways in diabetic nephropathy include transcription factors, pro-inflammatory cytokines, chemokines, adhesion molecules, Toll-like receptors, adipokines and nuclear receptors, which are candidates for the new molecular targets for the treatment of diabetic nephropathy. Understanding of these molecular pathways of inflammation would translate into the development of anti-inflammation therapeutic strategies.
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Ortiz-Muñoz G, Lopez-Parra V, Lopez-Franco O, Fernandez-Vizarra P, Mallavia B, Flores C, Sanz A, Blanco J, Mezzano S, Ortiz A, Egido J, Gomez-Guerrero C. Suppressors of cytokine signaling abrogate diabetic nephropathy. J Am Soc Nephrol 2010; 21:763-72. [PMID: 20185635 DOI: 10.1681/asn.2009060625] [Citation(s) in RCA: 132] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Activation of Janus kinase/signal transducers and activators of transcription (JAK/STAT) is an important mechanism by which hyperglycemia contributes to renal damage, suggesting that modulation of this pathway may prevent renal and vascular complications of diabetes. Here, we investigated the involvement of suppressors of cytokine signaling (SOCS) as intracellular negative regulators of JAK/STAT activation in diabetic nephropathy. In a rat model, inducing diabetes resulted in JAK/STAT activation and increased expression of SOCS1 and SOCS3. In humans, we observed increased expression of glomerular and tubulointerstitial SOCS proteins in biopsies of patients with diabetic nephropathy. In vitro, high concentrations of glucose activated JAK/STAT/SOCS in human mesangial and tubular cells. Overexpression of SOCS reversed the glucose-induced activation of the JAK/STAT pathway, expression of STAT-dependent genes (chemokines, growth factors, and extracellular matrix proteins), and cell proliferation. In vivo, intrarenal delivery of adenovirus expressing SOCS1 and SOCS3 to diabetic rats significantly improved renal function and reduced renal lesions associated with diabetes, such as mesangial expansion, fibrosis, and influx of macrophages. SOCS gene delivery also decreased the activation of STAT1 and STAT3 and the expression of proinflammatory and profibrotic proteins in the diabetic kidney. In summary, these results provide direct evidence for a link between the JAK/STAT/SOCS axis and hyperglycemia-induced cell responses in the kidney. Suppression of the JAK/STAT pathway by increasing intracellular SOCS proteins may have therapeutic potential in diabetic nephropathy.
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Affiliation(s)
- Guadalupe Ortiz-Muñoz
- Renal and Vascular Research Laboratory, Fundacion Jimenez Diaz, Autonoma University, Madrid, Spain
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Expression of JAKs/STATs pathway molecules in rat model of rapid focal segmental glomerulosclerosis. Pediatr Nephrol 2009; 24:1661-71. [PMID: 19350281 DOI: 10.1007/s00467-009-1163-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2008] [Revised: 02/19/2009] [Accepted: 02/19/2009] [Indexed: 12/29/2022]
Abstract
The objective of this study was to investigate the role of the Janus kinase-signal transducers and activators of transcription (JAKs/STATs) pathway in focal segmental glomerulosclerosis. Sixty specific pathogen-free male Wistar rats were randomly divided into two groups: a model group (MG) and a control group (CG). In the MG group, nephropathy was induced by unilateral nephrectomy and a single tail vein injection of adriamycin (5 mg/kg). Ten rats were sacrificed every 2 weeks in each group. The expressions of smooth muscle alpha actin (alpha-SMA), collagen (COL)-IV, STAT1, and STAT3 were examined using histochemical techniques, and Western blotting was used to examine the protein levels of STAT1, STAT3, phosphorylated (P)-STAT1, P-STAT3, and transforming growth factor beta1 (TGFbeta(1)). The expressions of JAK1, JAK2, STAT1, STAT3, suppressors of cytokine signaling (SOCS)1, SOCS3, protein inhibitors of activated STAT (PIAS)1, and PIAS3 were also measured by real-time quantitative reverse transcriptase-PCR. A steady and significant increase in the expressions of alpha-SMA, COL-IV and TGFbeta(1) were observed in MG rats over the whole experimental course. Increased STAT1 and P-STAT1 levels in MG rats were observed by week 6, whereas increased levels of STAT3 and P-STAT3 were noted by week 2. At the mRNA levels, JAK1, STAT1, and PIAS1 were significantly increased in MG rats in week 2, whereas JAK2 mRNA showed a significant decrease by weeks 2 and 4, followed by an significant increase in week 6. Significantly increased STAT3 levels were noted in week 2, followed by a steady and significant decrease in weeks 4 and 6. Significantly reduced levels of SOCS1, SOCS3, and PIAS3 mRNA were noted at all time points. We conclude that the JAKs/STATs signaling pathway may play an important role in the pathological process of rapid focal segmental glomerulosclerosis in the rat model.
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Herrera VLM, Bagamasbad P, Didishvili T, Decano JL, Ruiz-Opazo N. Overlapping genes in Nalp6/PYPAF5 locus encode two V2-type vasopressin isoreceptors: angiotensin-vasopressin receptor (AVR) and non-AVR. Physiol Genomics 2008; 34:65-77. [PMID: 18413781 DOI: 10.1152/physiolgenomics.00199.2007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The angiotensin-vasopressin receptor (AVR) responds with equivalent affinities to angiotensin II (ANG II) and vasopressin and is coupled to adenylate cyclase and hence a V2-type vasopressin receptor. AVR maps to the Nalp6 locus and overlaps with the larger Nalp6/PYPAF5 reported to be a T cell/granulocyte-specific, cytoplasmic-specific proapoptotic protein, thus questioning the existence of AVR. Here we confirm, through different experimental modalities, that AVR is distinct from Nalp6/PYPAF5 based on different mRNA and protein sizes, subcellular localization, and tissue-specific expression patterns. Binding studies of PYPAF5-specific Cos1 transfectants detect high-affinity binding to vasopressin but not ANG II, thus assigning PYPAF5 as a non-AVR (NAVR). Signaling array analysis reveals that AVP stimulation of AVR- and NAVR-specific Cos1 transfectants results in diametrical activation as well as coactivation of signaling pathways known to mediate renal sodium and water balance. Likewise, ANG II stimulation of Cos1-AVR transfectants reveals a signaling profile distinct from that of AVP-stimulated Cos1-AVR transfectants. Analysis of genomic organization of the AVR/NAVR locus shows an overlapping gene arrangement with alternative promoter usage resulting in different NH(2) termini for NAVR and AVR. In addition to core promoter elements, androgen and estrogen response elements are detected. Promoter analysis of NAVR/AVR 5'-regulatory region detects transcriptional upregulation by testosterone and synergistic upregulation by testosterone and estrogen, thus suggesting that AVR and/or NAVR contribute to sex-specific V2-type vasopressin-mediated effects. Altogether, confirmation of AVR and identification of NAVR as vasopressin receptors are concordant with emerging vasopressin functions not attributable to V1a, V1b, or V2 receptors and add molecular bases for the multifunctional complexity of vasopressin-mediated functions and regulation.
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Affiliation(s)
- Victoria L M Herrera
- Section of Molecular Medicine, Department of Medicine and Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA 02118, USA
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