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Ma Y, Hu Y, Ma J. Animal models of the placenta accreta spectrum: current status and further perspectives. Front Endocrinol (Lausanne) 2023; 14:1118168. [PMID: 37223034 PMCID: PMC10200980 DOI: 10.3389/fendo.2023.1118168] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 03/20/2023] [Indexed: 05/25/2023] Open
Abstract
Placenta accreta spectrum disorder (PAS) is a kind of disease of placentation defined as abnormal trophoblast invasion of part or all of the placenta into the myometrium, even penetrating the uterus. Decidual deficiency, abnormal vascular remodeling in the maternal-fetal interface, and excessive invasion by extravillous trophoblast (EVT) cells contribute to its onset. However, the mechanisms and signaling pathways underlying such phenotypes are not fully understood, partly due to the lack of suitable experimental animal models. Appropriate animal models will facilitate the comprehensive and systematic elucidation of the pathogenesis of PAS. Due to the remarkably similar functional placental villous units and hemochorial placentation to humans, the current animal models of PAS are based on mice. There are various mouse models induced by uterine surgery to simulate different phenotypes of PAS, such as excessive invasion of EVT or immune disturbance at the maternal-fetal interface, which could define the pathological mechanism of PAS from the perspective of the "soil." Additionally, genetically modified mouse models could be used to study PAS, which is helpful to exploring the pathogenesis of PAS from the perspectives of both "soil" and "seed," respectively. This review details early placental development in mice, with a focus on the approaches of PAS modeling. Additionally, the strengths, limitations and the applicability of each strategy and further perspectives are summarized to provide the theoretical foundation for researchers to select appropriate animal models for various research purposes. This will help better determine the pathogenesis of PAS and even promote possible therapy.
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Affiliation(s)
- Yongdan Ma
- Department of Obstetrics and Gynecology, Peking University First Hospital, Beijing, China
| | - Yongyan Hu
- Laboratory Animal Center, Peking University First Hospital, Beijing, China
| | - Jingmei Ma
- Department of Obstetrics and Gynecology, Peking University First Hospital, Beijing, China
- Beijing Key Laboratory of Maternal Fetal Medicine of Gestational Diabetes Mellitus, Beijing, China
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Zhang L, Zuo J, Huang S, Chang Q. Endothelial progenitor cells overexpressing Grb2-associated binder 1 for in vitro-constructed tissue-engineered heart valves. KARDIOLOGIIA 2022; 62:38-43. [PMID: 35989628 DOI: 10.18087/cardio.2022.7.n2100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 05/27/2022] [Indexed: 06/15/2023]
Abstract
Aim Endothelial progenitor cells (EPCs) play important roles in heart valve replacement surgery. Up-regulation of Grb2‑associated binder 1 (Gab1) promotes hepatocyte growth factor (HGF) - induced endothelial progenitor cell proliferation and migration. This study aimed to investigate the effects of up-regulation of Gab1 in hepatocyte growth factor-induced EPCs in tissue-engineered heart valves (TEHV).Material and methods Fresh porcine aortic valves were placed in 1 % Triton X-100 and trypsin buffer for decellularization. EPCs in the control group were cultured normally, whereas those in the experimental group were both HGF stimulated and transfected with adenovirus containing the Gab1 gene. Cells in the two groups were seeded onto the decellularized valve scaffolds and cultured for 3 or 7 days. TEHV were analyzed by HE and AB-PAS staining.Results By day 3, the experimental group had formed confluent endothelial monolayers on top of the decellularized valves, on the basis of by HE staining and AB-PAS staining. One week later, the control group showed a imperfect endothelial layer.Conclusion HGF-induced EPCs overexpressing Gab1 can endothelialize the decellularized matrix and create functional TEHV, which may then be preconditioned in a bioreactor before clinical implantation.
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Affiliation(s)
- Liyu Zhang
- Qingdao University; The Affiliated Hospital of Qingdao University
| | - Jianxin Zuo
- Qingdao University; The Affiliated Hospital of Qingdao University
| | - Siyang Huang
- Qingdao University; The Affiliated Hospital of Qingdao University
| | - Qing Chang
- Qingdao University; The Affiliated Hospital of Qingdao University
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Guo J, Li J, Zhang J, Guo X, Liu H, Li P, Zhang Y, Lin C, Fan Z. LncRNA PVT1 knockdown alleviated ox-LDL-induced vascular endothelial cell injury and atherosclerosis by miR-153-3p/GRB2 axis via ERK/p38 pathway. Nutr Metab Cardiovasc Dis 2021; 31:3508-3521. [PMID: 34627697 DOI: 10.1016/j.numecd.2021.08.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 08/04/2021] [Accepted: 08/06/2021] [Indexed: 12/28/2022]
Abstract
BACKGROUND AND AIMS LncRNA plasmacytoma variant translocation 1 (PVT1) plays a regulatory role in some cardiovascular diseases, but its role in atherosclerosis (AS) remains barely explored. The study aimed to investigate the effects of PVT1 on high fat diet-induced AS and its potential mechanisms. METHODS AND RESULTS ApoE -/- mice were fed with high fat diet for 8 weeks to establish an AS model. Lentiviral vectors containing PVT1 short hairpin RNA (PVT1-shRNA) or NC-shRNA were administered by tail vein injection. Cell viability, apoptosis, inflammatory factor secretion, and cellular oxidative stress were measured to evaluate oxidized low-density lipoprotein (ox-LDL)-induced human umbilical vein endothelial cell (HUVEC) injury. Dual-luciferase reporter gene and RNA immunoprecipitation assays were used to confirm the interaction between miR-153-3p and PVT1 or growth factor receptor binding protein 2 (GRB2). Atherosclerotic lesions, lipid deposition, and cell apoptosis in aorta were analyzed by H&E, Oil Red O, and TUNEL straining. PVT1 knockdown alleviated ox-LDL-induced inflammation, apoptosis and oxidative stress in HUVECs. PVT1 acted as a sponge of miR-153-3p, and GRB2 was confirmed as a target of miR-153-3p. MiR-153-3p overexpression attenuated the enhanced effects of PVT1 on ox-LDL-induced cell damage. GRB2 overexpression reversed the mitigating effects of miR-153-3p on ox-LDL-caused injury. Inhibiting PVT1 restrained the activation of ERK1/2 and p38 pathway via miR-153-3p/GRB2 axis. Additionally, silencing PVT1 in vivo reduced atherosclerotic plaques, lipid deposition, inflammation, oxidative stress, and apoptosis in AS mice. CONCLUSION PVT1 knockdown alleviated ox-LDL-induced vascular endothelial cell injury and atherosclerosis through miR-153-3p/GRB2 axis via ERK1/2 and p38 pathway.
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Affiliation(s)
- Junxia Guo
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Jianhua Li
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Junbiao Zhang
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Xiaoliang Guo
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Hui Liu
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China.
| | - Peicheng Li
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Yongchun Zhang
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Cheng Lin
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Zhenping Fan
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
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Karabulut S, Korkmaz O, Erdem Altun C, Keskin I. A Histopathological Evaluation of Ovarian Hyperstimulation Syndrome on Reproductive and Vital Organs and the Role of the VEGF-PKA Pathway in a Mouse Model. Cells Tissues Organs 2021; 210:218-238. [PMID: 34320509 DOI: 10.1159/000517424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 05/14/2021] [Indexed: 11/19/2022] Open
Abstract
Ovarian hyperstimulation syndrome (OHSS) is one of the most common and iatrogenic complications of in vitro fertilization therapy, which is an exaggerated response to excess hormones resulting in the development of a large number of maturing follicles. Although the complications of and reasons for the condition are well known, the overall histopathological effects on systemic organs and the extent of the damage have not been fully elucidated. Besides, the mechanism that underlies the situation is not very well known. The aim of the present work was to analyse the histopathological effects of OHSS on reproductive (uterus and ovary) and vital organs (liver and kidney) and the possible role of the VEGF-PKA pathway in triggering the condition. Balb/c mice were used to establish an OHSS model. The OHSS group were injected with overdose PMSG while the normal responder group were injected with an optimal dose. Histopathological evaluation was utilised in the liver, kidney, ovary, and uterus stained with hematoxylin and eosin, Masson's trichrome, and periodic acid-Schiff stain. The expression profiles of VEGF (vascular endothelial growth factor), PKA (protein kinase A), and p-PKA (an activated form of PKA) were detected with immunohistochemistry and Western blotting. OHSS was demonstrated to have a negative histopathological effect on all of the organs analysed. These effects were associated with an overall increase in the expression levels of VEGF, PKA, and p-PKA. OHSS has a serious histopathological negative effect on the systemic and reproductive organs and is proven to affect overall health, and thus should be considered a dangerous complication during ART techniques. The activation of the VEGF-PKA pathway, which is indicated by the expression levels of VEGF, PKA, and p-PKA, is demonstrated to accompany this complication, which should be further elucidated to understand the mechanisms underlying the condition.
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Affiliation(s)
- Seda Karabulut
- Department of Histology and Embryology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.,Health Science and Technologies Research Institute (SABITA), Istanbul, Turkey
| | - Oya Korkmaz
- Department of Histology and Embryology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.,Health Science and Technologies Research Institute (SABITA), Istanbul, Turkey
| | - Ceren Erdem Altun
- Department of Histology and Embryology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey
| | - Ilknur Keskin
- Department of Histology and Embryology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.,Health Science and Technologies Research Institute (SABITA), Istanbul, Turkey
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Mizutani N, Hikita H, Saito Y, Myojin Y, Sato K, Urabe M, Kurahashi T, Shiode Y, Sakane S, Murai K, Nozaki Y, Kodama T, Sakamori R, Yoshida Y, Tatsumi T, Takehara T. Gab1 in livers with persistent hepatocyte apoptosis has an antiapoptotic effect and reduces chronic liver injury, fibrosis, and tumorigenesis. Am J Physiol Gastrointest Liver Physiol 2021; 320:G958-G968. [PMID: 33787344 DOI: 10.1152/ajpgi.00370.2020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 03/12/2021] [Accepted: 03/19/2021] [Indexed: 01/31/2023]
Abstract
Grb2-associated binder 1 (Gab1) is an adaptor protein that is important for intracellular signal transduction by receptor tyrosine kinases that are receptors for various growth factors and plays an important role in rapid liver regeneration after partial hepatectomy and during acute hepatitis. On the other hand, mild liver regeneration is induced in livers of individuals with chronic hepatitis, where hepatocyte apoptosis is persistent; however, the impact of Gab1 on such livers remains unclear. We examined the role of Gab1 in chronic hepatitis. Gab1 knockdown enhanced the decrease in cell viability and apoptosis induced by ABT-737, a Bcl-2/-xL/-w inhibitor, in BNL.CL2 cells, while cell viability and caspase activity were unchanged in the absence of ABT-737. ABT-737 treatment induced Gab1 cleavage to form p35-Gab1. p35-Gab1 was also detected in the livers of mice with hepatocyte-specific Mcl-1 knockout (KO), which causes persistent hepatocyte apoptosis. Gab1 deficiency exacerbated hepatocyte apoptosis in Mcl-1 KO mice with posttranscriptional downregulation of Bcl-XL. In BNL.CL2 cells treated with ABT-737, Gab1 knockdown posttranscriptionally suppressed Bcl-xL expression, and p35-Gab1 overexpression enhanced Bcl-xL expression. Gab1 deficiency in Mcl-1 KO mice activated STAT3 signaling in hepatocytes, increased hepatocyte proliferation, and increased the incidence of liver cancer with the exacerbation of liver fibrosis. In conclusion, Gab1 is cleaved in the presence of apoptotic stimuli and forms p35-Gab1 in hepatocytes. In chronic liver injury, the role of Gab1 in suppressing apoptosis and reducing liver damage, fibrosis, and tumorigenesis is more important than its role in liver regeneration.NEW & NOTEWORTHY Grb2-associated binder 1 (Gab1) is known to contribute to liver regeneration after acute liver injury. However, in chronic liver diseases, Gab1 plays a greater role in suppressing hepatocyte apoptosis than in liver regeneration, resulting in suppression of hepatocyte proliferation, liver fibrosis, and liver carcinogenesis.
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Affiliation(s)
- Naoki Mizutani
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Hayato Hikita
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yoshinobu Saito
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yuta Myojin
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Katsuhiko Sato
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Makiko Urabe
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Tomohide Kurahashi
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yuto Shiode
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Sadatsugu Sakane
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Kazuhiro Murai
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yasutoshi Nozaki
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Takahiro Kodama
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Ryotaro Sakamori
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yuichi Yoshida
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Tomohide Tatsumi
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Tetsuo Takehara
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
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Potential physio-pathological effects of branched fatty acid esters of hydroxy fatty acids. Biochimie 2021; 182:13-22. [PMID: 33412159 DOI: 10.1016/j.biochi.2020.12.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 12/14/2020] [Accepted: 12/28/2020] [Indexed: 12/31/2022]
Abstract
Branched Fatty Acid Esters of Hydroxy Fatty Acids (FAHFAs) are a new endogenous lipid class with recently uncovered interesting biological effects and which have been detected in food of plant and animal origins. Some FAHFAs can improve glucose tolerance and insulin sensitivity, stimulate insulin secretion, and exert anti-inflammatory effects. Other beneficial health effects have also been suggested, in particular against some cancers. FAHFAs could therefore be a potential therapeutic target for the treatment of numerous metabolic disorders such as type II diabetes, hepatic steatosis, cardiovascular diseases and various cancers. Their recent discovery has generated a great interest in the field of human health. This short review aims at bringing together the information available to date in the literature concerning their chemical synthesis, biosynthesis and degradation pathways as well as their potential physio-pathological beneficial effects.
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Wang L, Hu N, Jiang Z, Luo P, Yi N, Chen Y, Zhou N, Liu L. Association Between Serum Human Epididymis Protein 4 Levels and Cardiovascular Events in Obese Patients with Breast Cancer. Diabetes Metab Syndr Obes 2021; 14:3703-3710. [PMID: 34456577 PMCID: PMC8387245 DOI: 10.2147/dmso.s320122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 07/01/2021] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Patients with cancer have a higher incidence of cardiovascular diseases (CVDs). We aimed to evaluate the relationship between serum human epididymal protein 4 (HE4) levels and cardiovascular events in obese patients with breast cancer. METHODS Serum HE4 levels in 316 obese patients with breast cancer were measured at baseline and then prospectively followed up for approximately 36 months. The prognostic value of serum HE4 for predicting cardiovascular events was analyzed by the Cox proportional hazard model. RESULTS Serum HE4 was significantly associated with CVD history after adjustment for confounding factors (OR= 1.50; 95% CI 1.23-3.43; P=0.038) using multivariable logistic regression analysis. The multivariable Cox proportional hazard analysis suggested that serum HE4 had an independent prognostic value for predicting cardiovascular events in patients with breast cancer (HR=2.21, 95% CI 1.60-5.13, P<0.001). Additionally, sensitivity analysis showed that the independent association still existed. Stratified analysis showed that this relationship was not affected by chemoradiotherapy. CONCLUSION Serum HE4 is significantly related to cardiovascular events and poses good prognostic value for predicting cardiovascular events in obese patients with breast cancer. Serum HE4 may be a valuable indicator for the early detection of cardiovascular complications in obese patients with breast cancer.
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Affiliation(s)
- Li Wang
- Department of Breast Surgery, Nanhua Hospital, Nanhua University, Hengyang City, Hunan Province, 421002, People’s Republic of China
| | - Nie Hu
- Department of Breast Surgery, Nanhua Hospital, Nanhua University, Hengyang City, Hunan Province, 421002, People’s Republic of China
| | - Zhongjun Jiang
- Department of Breast Surgery, Nanhua Hospital, Nanhua University, Hengyang City, Hunan Province, 421002, People’s Republic of China
| | - Ping Luo
- Department of Breast Surgery, Nanhua Hospital, Nanhua University, Hengyang City, Hunan Province, 421002, People’s Republic of China
| | - Nian Yi
- Department of Breast Surgery, Nanhua Hospital, Nanhua University, Hengyang City, Hunan Province, 421002, People’s Republic of China
| | - Yanhua Chen
- Department of General Surgery, Nanhua Hospital, Nanhua University, Hengyang City, Hunan Province, 421002, People’s Republic of China
| | - Ning Zhou
- Department of General Surgery, Nanhua Hospital, Nanhua University, Hengyang City, Hunan Province, 421002, People’s Republic of China
| | - Longfei Liu
- Department of General Surgery, Nanhua Hospital, Nanhua University, Hengyang City, Hunan Province, 421002, People’s Republic of China
- Correspondence: Longfei Liu Department of General Surgery, Nanhua Hospital, Nanhua University, No. 336, Dongfeng South Road, Hengyang City, Hunan Province, 421002, People’s Republic of ChinaTel +86 0734-8399028 Email
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Loss of GRB2 associated binding protein 1 in arteriosclerosis obliterans promotes host autophagy. Chin Med J (Engl) 2020; 134:73-80. [PMID: 33323827 PMCID: PMC7862813 DOI: 10.1097/cm9.0000000000001255] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Background: Arteriosclerosis obliterans (ASO) is a major cause of adult limb loss worldwide. Autophagy of vascular endothelial cell (VEC) contributes to the ASO progression. However, the molecular mechanism that controls VEC autophagy remains unclear. In this study, we aimed to explore the role of the GRB2 associated binding protein 1 (GAB1) in regulating VEC autophagy. Methods: In vivo and in vitro studies were applied to determine the loss of adapt protein GAB1 in association with ASO progression. Histological GAB1 expression was measured in sclerotic vascular intima and normal vascular intima. Gain- and loss-of-function of GAB1 were applied in VEC to determine the effect and potential downstream signaling of GAB1. Results: The autophagy repressor p62 was significantly downregulated in ASO intima as compared to that in healthy donor (0.80 vs. 0.20, t = 6.43, P < 0.05). The expression level of GAB1 mRNA (1.00 vs. 0.24, t = 7.41, P < 0.05) and protein (0.72 vs. 0.21, t = 5.97, P < 0.05) was significantly decreased in ASO group as compared with the control group. Loss of GAB1 led to a remarkable decrease in LC3II (1.19 vs. 0.68, t = 5.99, P < 0.05), whereas overexpression of GAB1 significantly led to a decrease in LC3II level (0.41 vs. 0.93, t = 7.12, P < 0.05). Phosphorylation levels of JNK and p38 were significantly associated with gain- and loss-of-function of GAB1 protein. Conclusion: Loss of GAB1 promotes VEC autophagy which is associated with ASO. GAB1 and its downstream signaling might be potential therapeutic targets for ASO treatment.
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Surapaneni SK, Bhat ZR, Tikoo K. MicroRNA-941 regulates the proliferation of breast cancer cells by altering histone H3 Ser 10 phosphorylation. Sci Rep 2020; 10:17954. [PMID: 33087811 PMCID: PMC7578795 DOI: 10.1038/s41598-020-74847-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 08/25/2020] [Indexed: 12/25/2022] Open
Abstract
Breast cancer including triple negative breast cancer (TNBC) represents an important clinical challenge, as these tumours often develop resistance to conventional chemotherapeutics. MicroRNAs play a crucial role in cell-cycle regulation, differentiation, apoptosis, and migration. Herein, we performed Affymetrix Gene Chip miRNA 4.0 microarray and observed differential regulation of miRNAs (75 upregulated and 199 downregulated) in metastatic MDA-MB-231 cells as compared to immortalized human non-tumorigenic breast epithelial (MCF-10A) cells. MicroRNA-941 was significantly upregulated in MDA-MB-231 cells (almost nine-fold increase) in comparison to MCF-10A cells. Transfection of MiRNA-941 inhibitor significantly decreased the proliferation and migration of MDA-MB-231 cells by altering the expressions of p21, Cyclin D1, PP2B-B1, E-cadherin and MMP-13. Interestingly, we provide first evidence that inhibiting miR-941 prevents cell proliferation and phosphorylation of histone H3 at Ser10 residue. Xenograft model of breast cancer was developed by subcutaneous injection of MDA-MB-231 cells into the mammary fat pad of female athymic nude mice (Crl:NU-Foxn1nu). The tumours were allowed to grow to around 60 mm3, thereafter which we divided the animals into seven groups (n = 5). Notably, intratumoral injection of miR-941 inhibitor significantly abolished the tumour growth in MDA-MB-231 xenograft model. 5-Fluorouracil (10 mg/kg, i.p.) was used as positive control in our study. To the best of our knowledge, we report for the first time that targeting miR-941 improves the sensitivity of MDA-MB-231 cells to 5-fluorouracil. This can be of profound clinical significance, as it provides novel therapeutic approach for treating variety of cancers (overexpressing miRNA-941) in general and breast cancers in particular.
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Affiliation(s)
- Sunil Kumar Surapaneni
- Laboratory of Epigenetics and Diseases, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) S.A.S. Nagar, Sahibzada Ajit Singh Nagar, India
| | - Zahid Rafiq Bhat
- Laboratory of Epigenetics and Diseases, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) S.A.S. Nagar, Sahibzada Ajit Singh Nagar, India
| | - Kulbhushan Tikoo
- Laboratory of Epigenetics and Diseases, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER) S.A.S. Nagar, Sahibzada Ajit Singh Nagar, India.
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Sliz A, Locker KCS, Lampe K, Godarova A, Plas DR, Janssen EM, Jones H, Herr AB, Hoebe K. Gab3 is required for IL-2- and IL-15-induced NK cell expansion and limits trophoblast invasion during pregnancy. Sci Immunol 2020; 4:4/38/eaav3866. [PMID: 31375526 DOI: 10.1126/sciimmunol.aav3866] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 07/03/2019] [Indexed: 12/12/2022]
Abstract
The scaffolding protein Grb2-associated binding protein 3 (Gab3) is a member of the Gab family, whose functions have remained elusive. Here, we identify Gab3 as a key determinant of peripheral NK cell expansion. Loss of Gab3 resulted in impaired IL-2 and IL-15-induced NK cell priming and expansion due to a selective impairment in MAPK signaling but not STAT5 signaling. In vivo, we found that Gab3 is required for recognition and elimination of "missing-self" and tumor targets. Unexpectedly, our studies also revealed that Gab3 plays an important role during pregnancy. Gab3-deficient mice exhibited impaired uterine NK cell expansion associated with abnormal spiral artery remodeling and increased trophoblast invasion in the decidua basalis. This coincided with stillbirth, retained placenta, maternal hemorrhage, and undelivered fetoplacental units at term. Thus, Gab3 is a key component required for cytokine-mediated NK cell priming and expansion that is essential for antitumor responses and limits trophoblast cell invasion during pregnancy.
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Affiliation(s)
- Anna Sliz
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45220, USA.,Division of Immunobiology, Cincinnati Children's Hospital Research Foundation, Cincinnati, OH 45229, USA.,Immunology Graduate Program, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, OH 45220, USA
| | - Kathryn C S Locker
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45220, USA.,Division of Immunobiology, Cincinnati Children's Hospital Research Foundation, Cincinnati, OH 45229, USA.,Immunology Graduate Program, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, OH 45220, USA
| | - Kristin Lampe
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45220, USA.,Division of Immunobiology, Cincinnati Children's Hospital Research Foundation, Cincinnati, OH 45229, USA
| | - Alzbeta Godarova
- Biomedical Informatics Graduate Program, University of Cincinnati College of Medicine, Cincinnati, OH 45220, USA
| | - David R Plas
- Vontz Center for Molecular Studies, University of Cincinnati, Cincinnati, OH 45267, USA
| | | | - Helen Jones
- Division of General Pediatric and Thoracic Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA.,Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH 45220, USA
| | - Andrew B Herr
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45220, USA.,Division of Immunobiology, Cincinnati Children's Hospital Research Foundation, Cincinnati, OH 45229, USA.,Immunology Graduate Program, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, OH 45220, USA
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Al-Husseinawi E, Bui MM, Ahmed AA. Grb2-associated binding protein-1 as a biomarker in bone and soft tissue sarcomas. Pathology 2019; 51:610-614. [DOI: 10.1016/j.pathol.2019.05.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 05/09/2019] [Accepted: 05/16/2019] [Indexed: 12/31/2022]
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12
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Fan Q, Zhang L, Zhu W, Xue S, Song Y, Chang Q. Up-regulation of Grb2-associated binder 1 promotes hepatocyte growth factor-induced endothelial progenitor cell proliferation and migration. PeerJ 2019; 7:e6675. [PMID: 30956905 PMCID: PMC6442669 DOI: 10.7717/peerj.6675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 02/25/2019] [Indexed: 01/08/2023] Open
Abstract
Objectives Grb2-associated binder 1 (Gab1), a scaffolding adaptor protein, plays an important role in transmitting key signals that control cell growth, migration, and function from multiple tyrosine kinase receptors. This study was designed to investigate the influence of upregulation of Gab1 in endothelial progenitor cells (EPCs) stimulated with hepatocyte growth factor (HGF), and the underlying molecular mechanisms. Materials and Methods Endothelial progenitor cells isolated from human umbilical cord blood were identified and divided into four groups. EPCs in the Control group were cultured normally; those in the Control+HGF group were treated with HGF stimulation; those in the AD-Gab1 group were transfected with adenovirus containing the Gab1 gene but not treated with HGF stimulation; and, those in the AD-Gab1+HGF group were treated with both HGF stimulation and transfection with adenovirus containing the Gab1 gene. Subsequently, Gab1 expression and proliferation and migration ability were compared for EPCs grown under different conditions. Furthermore, we measured phosphorylation levels of three key proteins Gab1, SHP2, and ERK1/2. Results The AD-Gab1+HGF group had the highest expression of Gab1 and higher proliferation and migration than the other three groups. Conclusions Upregulation of Gab1 promoted HGF-induced EPC proliferation and migration. Mechanistically, HGF stimulated Gab1 tyrosine phosphorylation in EPCs, thus leading to activation of extracellular regulated MAP kinase 1/2, which is involved in proliferation and migration signaling.
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Affiliation(s)
- Qing Fan
- Qingdao University, Qingdao, China.,Cardiovascular Surgery Department, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Liyu Zhang
- Qingdao University, Qingdao, China.,Cardiovascular Surgery Department, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Wenjie Zhu
- Qingdao University, Qingdao, China.,Cardiovascular Surgery Department, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Sheng Xue
- Institute for Translational Medicine, Qingdao University, Qingdao, China
| | - Yisheng Song
- Qingdao University, Qingdao, China.,Cardiovascular Surgery Department, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Qing Chang
- Qingdao University, Qingdao, China.,Cardiovascular Surgery Department, The Affiliated Hospital of Qingdao University, Qingdao, China
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13
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Cecchinato A, Macciotta NPP, Mele M, Tagliapietra F, Schiavon S, Bittante G, Pegolo S. Genetic and genomic analyses of latent variables related to the milk fatty acid profile, milk composition, and udder health in dairy cattle. J Dairy Sci 2019; 102:5254-5265. [PMID: 30904297 DOI: 10.3168/jds.2018-15867] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 03/04/2019] [Indexed: 12/31/2022]
Abstract
The aim of this study was to perform genetic, genome-wide association (GWAS), and gene-set enrichment analyses with latent variables related to milk fatty acid profile (i.e., fatty acids factor scores; FAF), milk composition, and udder health in a cohort of 1,158 Italian Brown Swiss cows. The phenotypes under study were 12 FAF previously identified through factor analysis and classified as follows: de novo FA (F1), branched-chain FA-milk yield (F2), biohydrogenation (F3), long-chain fatty acids (F4), desaturation (F5), short-chain fatty acids (F6), milk protein and fat contents (F7), odd fatty acids (F8), conjugated linoleic acids (F9), linoleic acid (F10), udder health (F11) and vaccelenic acid (F12). (Co)variance components were estimated for factor scores using a Bayesian linear animal model via Gibbs sampling. The animals were genotyped with the Illumina BovineSNP50 BeadChip v.2 (Illumina Inc., San Diego, CA). A single marker regression model was fitted for GWAS analysis. The gene-set enrichment analysis was run on the GWAS results using the Gene Ontology and the Kyoto Encyclopedia of Genes and Genomes pathway databases to identify the ontologies and pathways associated with the FAF. Marginal posterior means of the heritabilities of the aforementioned FAF ranged from 0.048 for F12 to 0.310 for F5. Factors F1 and F6 had the highest number of relevant genetic correlations with the other traits. The genomic analysis detected a total of 39 significant SNP located on 17 Bos taurus autosomes. All latent variables produced signals except for F2 and F10. The traits with the highest number of significant associations were F11 (17) and F12 (7). Gene-set enrichment analyses identified significant pathways (false discovery rate 5%) for F3 and F7. In particular, systemic lupus erythematosus was enriched for F3, whereas the MAPK (mitogen-activated protein kinase) signaling pathway was overrepresented for F7. The results support the existence of important and exploitable genetic and genomic variation in these latent explanatory phenotypes. Information acquired might be exploited in selection programs and when designing further studies on the role of the putative candidate genes identified in the regulation of milk composition and udder health.
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Affiliation(s)
- A Cecchinato
- Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro, Padova, Italy.
| | - N P P Macciotta
- Dipartimento di Agraria, Sezione Scienze Zootecniche, Università di Sassari, Via de Nicola 9, 07100 Sassari, Italy
| | - M Mele
- Dipartimento di Scienze Agrarie, Alimentari, Agro-ambientali, Università di Pisa, Via del Borghetto, 80, 56124 Pisa, Italy
| | - F Tagliapietra
- Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro, Padova, Italy
| | - S Schiavon
- Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro, Padova, Italy
| | - G Bittante
- Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro, Padova, Italy
| | - S Pegolo
- Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), University of Padova, Viale dell'Università 16, 35020 Legnaro, Padova, Italy
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14
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Deng H, Fung G, Qiu Y, Wang C, Zhang J, Jin ZG, Luo H. Cleavage of Grb2-Associated Binding Protein 2 by Viral Proteinase 2A during Coxsackievirus Infection. Front Cell Infect Microbiol 2017; 7:85. [PMID: 28361043 PMCID: PMC5352685 DOI: 10.3389/fcimb.2017.00085] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Accepted: 03/03/2017] [Indexed: 12/18/2022] Open
Abstract
Coxsackievirus type B3 (CV-B3), an enterovirus associated with the pathogenesis of several human diseases, subverts, or employs the host intracellular signaling pathways to support effective viral infection. We have previously demonstrated that Grb2-associated binding protein 1 (GAB1), a signaling adaptor protein that serves as a platform for intracellular signaling assembly and transduction, is cleaved upon CV-B3 infection, resulting in a gain-of-pro-viral-function via the modification of GAB1-mediated ERK1/2 pathway. GAB2 is a mammalian homolog of GAB1. In this study, we aim to address whether GAB2 plays a synergistic role with GAB1 in the regulation of CV-B3 replication. Here, we reported that GAB2 is also a target of CV-B3-encoded viral proteinase. We showed that GAB2 is cleaved at G238 during CV-B3 infection by viral proteinase 2A, generating two cleaved fragments of GAB2-N1−237 and GAB2-C238−676. Moreover, knockdown of GAB2 significantly inhibits the synthesis of viral protein and subsequent viral progeny production, accompanied by reduced levels of phosphorylated p38, suggesting a pro-viral function for GAB2 linked to p38 activation. Finally, we examined whether the cleavage of GAB2 can promote viral replication as observed for GAB1 cleavage. We showed that expression of neither GAB2-N1−237 nor GAB2-C238−676 results in enhanced viral infectivity, indicating a loss-of-function, rather than a gain-of-function of GAB2 cleavage in mediating virus replication. Taken together, our findings in this study suggest a novel host defense machinery through which CV-B3 infection is limited by the cleavage of a pro-viral protein.
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Affiliation(s)
- Haoyu Deng
- Centre for Heart Lung Innovation, St. Paul's Hospital and Department of Pathology and Laboratory Medicine, University of British ColumbiaVancouver, BC, Canada; Department of Vascular Surgery, RenJi Hospital, Shanghai Jiaotong University School of MedicineShanghai, China
| | - Gabriel Fung
- Centre for Heart Lung Innovation, St. Paul's Hospital and Department of Pathology and Laboratory Medicine, University of British Columbia Vancouver, BC, Canada
| | - Ye Qiu
- Centre for Heart Lung Innovation, St. Paul's Hospital and Department of Pathology and Laboratory Medicine, University of British Columbia Vancouver, BC, Canada
| | - Chen Wang
- Centre for Heart Lung Innovation, St. Paul's Hospital and Department of Pathology and Laboratory Medicine, University of British ColumbiaVancouver, BC, Canada; Institute of Basic Theory for Chinese Medicine, China Academy of Chinese Medical ScienceBeijing, China
| | - Jingchun Zhang
- Centre for Heart Lung Innovation, St. Paul's Hospital and Department of Pathology and Laboratory Medicine, University of British Columbia Vancouver, BC, Canada
| | - Zheng-Gen Jin
- Aab Cardiovascular Research Institute and Department of Medicine, University of Rochester School of Medicine and Dentistry Rochester, NY, USA
| | - Honglin Luo
- Centre for Heart Lung Innovation, St. Paul's Hospital and Department of Pathology and Laboratory Medicine, University of British Columbia Vancouver, BC, Canada
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15
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Yasui T, Masaki T, Arita Y, Ishibashi T, Inagaki T, Okazawa M, Oka T, Shioyama W, Yamauchi-Takihara K, Komuro I, Sakata Y, Nakaoka Y. Molecular Characterization of Striated Muscle-Specific Gab1 Isoform as a Critical Signal Transducer for Neuregulin-1/ErbB Signaling in Cardiomyocytes. PLoS One 2016; 11:e0166710. [PMID: 27861634 PMCID: PMC5115770 DOI: 10.1371/journal.pone.0166710] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 11/02/2016] [Indexed: 01/23/2023] Open
Abstract
Grb2-associated binder (Gab) docking proteins regulate signals downstream of a variety of growth factors and receptor tyrosine kinases. Neuregulin-1 (NRG-1), a member of epidermal growth factor family, plays a critical role for cardiomyocyte proliferation and prevention of heart failure via ErbB receptors. We previously reported that Gab1 and Gab2 in the myocardium are essential for maintenance of myocardial function in the postnatal heart via transmission of NRG-1/ErbB-signaling through analysis of Gab1/Gab2 cardiomyocyte-specific double knockout mice. In that study, we also found that there is an unknown high-molecular weight (high-MW) Gab1 isoform (120 kDa) expressed exclusively in the heart, in addition to the ubiquitously expressed low-MW (100 kDa) Gab1. However, the high-MW Gab1 has been molecularly ill-defined to date. Here, we identified the high-MW Gab1 as a striated muscle-specific isoform. The high-MW Gab1 has an extra exon encoding 27 amino acid residues between the already-known 3rd and 4th exons of the ubiquitously expressed low-MW Gab1. Expression analysis by RT-PCR and immunostaining with the antibody specific for the high-MW Gab1 demonstrate that the high-MW Gab1 isoform is exclusively expressed in striated muscle including heart and skeletal muscle. The ratio of high-MW Gab1/ total Gab1 mRNAs increased along with heart development. The high-MW Gab1 isoform in heart underwent tyrosine-phosphorylation exclusively after intravenous administration of NRG-1, among several growth factors. Adenovirus-mediated overexpression of the high-MW Gab1 induces more sustained activation of AKT after stimulation with NRG-1 in cardiomyocytes compared with that of β-galactosidase. On the contrary, siRNA-mediated knockdown of the high-MW Gab1 significantly attenuated AKT activation after stimulation with NRG-1 in cardiomyocytes. Taken together, these findings suggest that the striated muscle-specific high-MW isoform of Gab1 has a crucial role for NRG-1/ErbB signaling in cardiomyocytes.
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Affiliation(s)
- Taku Yasui
- Department of Vascular Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Takeshi Masaki
- Department of Vascular Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yoh Arita
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Tomohiko Ishibashi
- Department of Vascular Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
| | - Tadakatsu Inagaki
- Department of Vascular Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
| | - Makoto Okazawa
- Department of Vascular Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
| | - Toru Oka
- Department of Cardiology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
| | - Wataru Shioyama
- Department of Cardiology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
| | - Keiko Yamauchi-Takihara
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Issei Komuro
- Department of Cardiovascular Medicine, The University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Yasushi Sakata
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yoshikazu Nakaoka
- Department of Vascular Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science Technology Agency, Kawaguchi, Saitama, 332-0012, Japan
- * E-mail:
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16
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Chen S, Kang Y, Sun Y, Zhong Y, Li Y, Deng L, Tao J, Li Y, Tian Y, Zhao Y, Cheng J, Liu W, Feng GS, Lu Z. Deletion of Gab2 in mice protects against hepatic steatosis and steatohepatitis: a novel therapeutic target for fatty liver disease. J Mol Cell Biol 2016; 8:492-504. [PMID: 27282405 DOI: 10.1093/jmcb/mjw028] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 01/31/2016] [Accepted: 01/03/2016] [Indexed: 02/07/2023] Open
Abstract
Fatty liver disease is a serious health problem worldwide and is the most common cause for chronic liver disease and metabolic disorders. The major challenge in the prevention and intervention of this disease is the incomplete understanding of the underlying mechanism and thus lack of potent therapeutic targets due to multifaceted and interdependent disease factors. In this study, we investigated the role of a signaling adaptor protein, GRB2-associated-binding protein 2 (Gab2), in fatty liver using an animal disease model. Gab2 expression in hepatocytes responded to various disease factor stimulations, and Gab2 knockout mice exhibited resistance to fat-induced obesity, fat- or alcohol-stimulated hepatic steatosis, as well as methionine and choline deficiency-induced steatohepatitis. Concordantly, the forced expression or knockdown of Gab2 enhanced or diminished oleic acid (OA)- or ethanol-induced lipid production in hepatocytes in vitro, respectively. During lipid accumulation in hepatocytes, both fat and alcohol induced the recruitment of PI3K or Socs3 by Gab2 and the activation of their downstream signaling proteins AKT, ERK, and Stat3. Therefore, Gab2 may be a disease-associated protein that is induced by pathogenic factors to amplify and coordinate multifactor-induced signals to govern disease development in the liver. Our research provides a novel potential target for the prevention and intervention of fatty liver disease.
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Affiliation(s)
- Shuai Chen
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, Xiamen, Fujian 361005, China
| | - Yujia Kang
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, Xiamen, Fujian 361005, China
| | - Yan Sun
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, Xiamen, Fujian 361005, China
| | - Yanhong Zhong
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, Xiamen, Fujian 361005, China
| | - Yanli Li
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, Xiamen, Fujian 361005, China
| | - Lijuan Deng
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, Xiamen, Fujian 361005, China
| | - Jin Tao
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, Xiamen, Fujian 361005, China
| | - Yang Li
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, Xiamen, Fujian 361005, China
| | - Yingpu Tian
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, Xiamen, Fujian 361005, China
| | - Yinan Zhao
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, Xiamen, Fujian 361005, China
| | - Jianghong Cheng
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, Xiamen, Fujian 361005, China
| | - Wenjie Liu
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, Xiamen, Fujian 361005, China
| | - Gen-Sheng Feng
- Department of Pathology, and Division of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA
| | - Zhongxian Lu
- School of Pharmaceutical Sciences, State Key Laboratory of Cellular Stress Biology, Xiamen University, Xiamen, Fujian 361005, China
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17
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Furuta K, Yoshida Y, Ogura S, Kurahashi T, Kizu T, Maeda S, Egawa M, Chatani N, Nishida K, Nakaoka Y, Kiso S, Kamada Y, Takehara T. Gab1 adaptor protein acts as a gatekeeper to balance hepatocyte death and proliferation during acetaminophen-induced liver injury in mice. Hepatology 2016; 63:1340-55. [PMID: 26680679 DOI: 10.1002/hep.28410] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Accepted: 12/11/2015] [Indexed: 12/11/2022]
Abstract
UNLABELLED Acetaminophen (APAP) overdose is the leading cause of drug-induced acute liver failure. In APAP-induced acute liver failure, hepatocyte death and subsequent liver regeneration determines the prognosis of patients, making it necessary to identify suitable therapeutic targets based on detailed molecular mechanisms. Grb2-associated binder 1 (Gab1) adaptor protein plays a crucial role in transmitting signals from growth factor and cytokine receptors to downstream effectors. In this study, we hypothesized that Gab1 is involved in APAP-induced acute liver failure. Hepatocyte-specific Gab1 conditional knockout (Gab1CKO) and control mice were treated with 250 mg/kg of APAP. After APAP treatment, Gab1CKO mice had significantly higher mortality and elevated serum alanine aminotransferase levels compared to control mice. Gab1CKO mice had increased hepatocyte death and increased serum levels of high mobility group box 1, a marker of hepatocyte necrosis. In addition, Gab1CKO mice had reduced hepatocyte proliferation. The enhanced hepatotoxicity in Gab1CKO mice was associated with increased activation of stress-related c-Jun N-terminal kinase (JNK) and reduced activation of extracellular signal-regulated kinase and AKT. Furthermore, Gab1CKO mice showed enhanced mitochondrial translocation of JNK accompanied by an increase in the release of mitochondrial enzymes into the cytosol, which is indicative of increased mitochondrial dysfunction and subsequent nuclear DNA fragmentation. Finally, in vitro experiments showed that Gab1-deficient hepatocytes were more susceptible to APAP-induced mitochondrial dysfunction and cell death, suggesting that hepatocyte Gab1 is a direct target of APAP-induced hepatotoxicity. CONCLUSION Our current data demonstrate that hepatocyte Gab1 plays a critical role in controlling the balance between hepatocyte death and compensatory hepatocyte proliferation during APAP-induced liver injury.
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Affiliation(s)
- Kunimaro Furuta
- Department of Gastroenterology and Hepatology, Osaka University, Graduate School of Medicine, Suita, Osaka, Japan
| | - Yuichi Yoshida
- Department of Gastroenterology and Hepatology, Osaka University, Graduate School of Medicine, Suita, Osaka, Japan
| | - Satoshi Ogura
- Department of Gastroenterology and Hepatology, Osaka University, Graduate School of Medicine, Suita, Osaka, Japan
| | - Tomohide Kurahashi
- Department of Gastroenterology and Hepatology, Osaka University, Graduate School of Medicine, Suita, Osaka, Japan
| | - Takashi Kizu
- Department of Gastroenterology and Hepatology, Osaka University, Graduate School of Medicine, Suita, Osaka, Japan
| | - Shinichiro Maeda
- Department of Pharmacy, Osaka University Hospital, Suita, Osaka, Japan
| | - Mayumi Egawa
- Department of Gastroenterology and Hepatology, Osaka University, Graduate School of Medicine, Suita, Osaka, Japan
| | - Norihiro Chatani
- Department of Gastroenterology and Hepatology, Osaka University, Graduate School of Medicine, Suita, Osaka, Japan
| | - Keigo Nishida
- Laboratory of Immune Regulation, Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, Suzuka, Mie, Japan
| | - Yoshikazu Nakaoka
- Department of Cardiovascular Medicine, Osaka University, Graduate School of Medicine, Suita, Osaka, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science Technology Agency, Kawaguchi, Saitama, Japan
| | - Shinichi Kiso
- Department of Gastroenterology and Hepatology, Osaka University, Graduate School of Medicine, Suita, Osaka, Japan
| | - Yoshihiro Kamada
- Department of Gastroenterology and Hepatology, Osaka University, Graduate School of Medicine, Suita, Osaka, Japan.,Departments of Molecular Biochemistry and Clinical Investigation, Osaka University, Graduate School of Medicine, Suita, Osaka, Japan
| | - Tetsuo Takehara
- Department of Gastroenterology and Hepatology, Osaka University, Graduate School of Medicine, Suita, Osaka, Japan
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18
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Changes in Gab2 phosphorylation and interaction partners in response to interleukin (IL)-2 stimulation in T-lymphocytes. Sci Rep 2016; 6:23530. [PMID: 27025927 PMCID: PMC4812247 DOI: 10.1038/srep23530] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 03/08/2016] [Indexed: 02/07/2023] Open
Abstract
Interleukin-2 (IL-2) stimulation results in T-cell growth as a consequence of activation of highly sophisticated and fine-tuned signaling pathways. Despite lacking intrinsic enzymatic activity, scaffold proteins such as Gab2, play a pivotal role in IL-2-triggered signal transduction integrating, diversifying and amplifying the signal by serving as a platform for the assembly of effectors proteins. Traditionally, Gab2-mediated protein recruitment was believed to solely depend on cytokine-induced phosphotyrosine moieties. At present, phosphorylation on serine/threonine residues is also emerging as a key mediator of Gab2-dependent signal regulation. Despite its relevance, IL-2-triggered regulation on Gab2 phosphorylation is yet poorly understood. Combining antibody- and TiO2-based enrichment of the scaffold protein with SILAC quantitative mass spectrometry we disclose the prominent regulation IL-2 exerts on Gab2 serine/threonine phosphorylation by showing that at least 18 serines and 1 threonine, including previously non-reported ones, become phosphorylated in response to cytokine stimulation. Additionally, we decipher the interactome of the docking protein in resting and cytokine-treated T-lymphocytes and besides well-known Gab2 interactors we discover three novel cytokine-inducible Gab2-binding proteins. Thus, our data provide novel insights and a wealth of candidates for future studies that will shed light into the role of Gab2 in IL-2-initiated signal transduction.
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19
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Deng H, Fung G, Shi J, Xu S, Wang C, Yin M, Hou J, Zhang J, Jin ZG, Luo H. Enhanced enteroviral infectivity via viral protease-mediated cleavage of Grb2-associated binder 1. FASEB J 2015; 29:4523-31. [PMID: 26183772 DOI: 10.1096/fj.15-274829] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 06/30/2015] [Indexed: 12/23/2022]
Abstract
Coxsackievirus B3 (CVB3), an important human causative pathogen for viral myocarditis, pancreatitis, and meningitis, has evolved different strategies to manipulate the host signaling machinery to ensure successful viral infection. We previously revealed a crucial role for the ERK1/2 signaling pathway in regulating viral infectivity. However, the detail mechanism remains largely unknown. Grb2-associated binder 1 (GAB1) is an important docking protein responsible for intracellular signaling assembly and transduction. In this study, we demonstrated that GAB1 was proteolytically cleaved after CVB3 infection at G175 and G436 by virus-encoded protease 2A(pro), independent of caspase activation. Knockdown of GAB1 resulted in a significant reduction of viral protein expression and virus titers. Moreover, we showed that virus-induced cleavage of GAB1 is beneficial to viral growth as the N-terminal proteolytic product of GAB1 (GAB1-N1-174) further enhances ERK1/2 activation and promotes viral replication. Our results collectively suggest that CVB3 targets host GAB1 to generate a GAB1-N1-174 fragment that enhances viral infectivity, at least in part, via activation of the ERK pathway. The findings in this study suggest a novel mechanism that CVB3 employs to subvert the host signaling and facilitate consequent viral replication.
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Affiliation(s)
- Haoyu Deng
- *Centre for Heart Lung Innovation, St. Paul's Hospital, and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; and Aab Cardiovascular Research Institute and Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Gabriel Fung
- *Centre for Heart Lung Innovation, St. Paul's Hospital, and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; and Aab Cardiovascular Research Institute and Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Junyan Shi
- *Centre for Heart Lung Innovation, St. Paul's Hospital, and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; and Aab Cardiovascular Research Institute and Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Suowen Xu
- *Centre for Heart Lung Innovation, St. Paul's Hospital, and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; and Aab Cardiovascular Research Institute and Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Chen Wang
- *Centre for Heart Lung Innovation, St. Paul's Hospital, and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; and Aab Cardiovascular Research Institute and Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Meimei Yin
- *Centre for Heart Lung Innovation, St. Paul's Hospital, and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; and Aab Cardiovascular Research Institute and Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Jun Hou
- *Centre for Heart Lung Innovation, St. Paul's Hospital, and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; and Aab Cardiovascular Research Institute and Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Jingchun Zhang
- *Centre for Heart Lung Innovation, St. Paul's Hospital, and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; and Aab Cardiovascular Research Institute and Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Zheng-Gen Jin
- *Centre for Heart Lung Innovation, St. Paul's Hospital, and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; and Aab Cardiovascular Research Institute and Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - Honglin Luo
- *Centre for Heart Lung Innovation, St. Paul's Hospital, and Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; and Aab Cardiovascular Research Institute and Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
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20
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Bai R, Weng C, Dong H, Li S, Chen G, Xu Z. MicroRNA-409-3p suppresses colorectal cancer invasion and metastasis partly by targeting GAB1 expression. Int J Cancer 2015; 137:2310-22. [PMID: 25991585 DOI: 10.1002/ijc.29607] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Revised: 05/03/2015] [Accepted: 05/11/2015] [Indexed: 12/19/2022]
Abstract
Colorectal cancer (CRC) is one of the most common cancers worldwide and its metastasis accounts for the majority of deaths. However, the molecular mechanisms underlying CRC progression are not well characterized. In this study, we identified miR-409-3p as a tumor suppressor of CRC. MiR-409-3p expression was significantly downregulated in CRC tissue compared to adjacent non-tumor tissue, and reduced miR-409-3p expression was correlated with CRC metastasis. In vitro and in vivo studies revealed that miR-409-3p negatively regulated CRC metastatic capacities, including suppressing cancer cell migration, invasion and metastasis. To explore the mechanism of action of miR-409-3p, we adopted a pathway and pathophysiological event-based target screening and validation approach, and found nine known metastasis-related genes as potential targets. The 3'-UTR binding assays between the candidates and miR-409-3p suggested that only GAB1, NR4A2 and LMO4 were directly regulated by the miRNA. However, endogenous expression analysis revealed that only GAB1 was modulated by miR-409-3p in CRC cells at both the mRNA and protein levels. Furthermore, we provided evidence to conclude that GAB1 was partially responsible for miR-409-3p-mediated metastasis. Taken together, our data demonstrate that miR-409-3p is a metastatic suppressor, and post-transcriptional inhibition of the oncoprotein GAB1 is one of the mechanisms of action of this miRNA. Our finding suggests miR-409-3p might be a novel target for CRC metastasis treatment.
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Affiliation(s)
- Rongpan Bai
- Institute of Environmental Health, Zhejiang University School of Public Health, Hangzhou, China.,Research Center of Molecular Medicine, Zhejiang University School of Medicine, Hangzhou, China.,Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Chunhua Weng
- Institute of Environmental Health, Zhejiang University School of Public Health, Hangzhou, China
| | - Haojie Dong
- Institute of Environmental Health, Zhejiang University School of Public Health, Hangzhou, China.,Research Center of Molecular Medicine, Zhejiang University School of Medicine, Hangzhou, China.,Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Siqi Li
- Institute of Environmental Health, Zhejiang University School of Public Health, Hangzhou, China.,Research Center of Molecular Medicine, Zhejiang University School of Medicine, Hangzhou, China.,Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Guangdi Chen
- Institute of Environmental Health, Zhejiang University School of Public Health, Hangzhou, China.,Research Center of Molecular Medicine, Zhejiang University School of Medicine, Hangzhou, China.,Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhengping Xu
- Institute of Environmental Health, Zhejiang University School of Public Health, Hangzhou, China.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, China.,Research Center of Molecular Medicine, Zhejiang University School of Medicine, Hangzhou, China.,Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
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21
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Kizu T, Yoshida Y, Furuta K, Ogura S, Egawa M, Chatani N, Hamano M, Takemura T, Ezaki H, Kamada Y, Nishida K, Nakaoka Y, Kiso S, Takehara T. Loss of Gab1 adaptor protein in hepatocytes aggravates experimental liver fibrosis in mice. Am J Physiol Gastrointest Liver Physiol 2015; 308:G613-24. [PMID: 25617348 DOI: 10.1152/ajpgi.00289.2014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Accepted: 01/18/2015] [Indexed: 01/31/2023]
Abstract
Grb2-associated binder 1 (Gab1) adaptor protein amplifies signals downstream of a broad range of growth factors/receptor tyrosine kinases. Although these signals are implicated in liver fibrogenesis, the role of Gab1 remains unclear. To elucidate the role of Gab1, liver fibrosis was examined in hepatocyte-specific Gab1-conditional knockout (Gab1CKO) mice upon bile duct ligation (BDL). Gab1CKO mice developed exacerbated liver fibrosis with activation of hepatic myofibroblasts after BDL compared with control mice. The antifibrotic role of hepatocyte Gab1 was further confirmed by another well-established mouse model of liver fibrosis using chronic injections of carbon tetrachloride. After BDL, Gab1CKO mice also displayed exacerbated liver injury, decreased hepatocyte proliferation, and enhanced liver inflammation. Furthermore, cDNA microarray analysis was used to investigate the potential molecular mechanisms of the Gab1-mediated signal in liver fibrosis, and the fibrosis-promoting factor chemokine (C-C motif) ligand 5 (Ccl5) was identified as upregulated in the livers of Gab1CKO mice following BDL. Interestingly, in vitro studies using primary hepatocytes isolated from control and Gab1CKO mice revealed that the loss of Gab1 resulted in increased hepatocyte CCL5 synthesis upon lipopolysaccharide stimulation. Finally, pharmacological antagonism of CCL5 reduced BDL-induced liver fibrosis in Gab1CKO mice. In conclusion, our results demonstrate that hepatocyte Gab1 is required for liver fibrosis and that hepatocyte CCL5 could be an important contributor to this process. Thus, we present a novel antifibrotic function of hepatocyte Gab1 in liver fibrogenesis.
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Affiliation(s)
- Takashi Kizu
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Yuichi Yoshida
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Kunimaro Furuta
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Satoshi Ogura
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Mayumi Egawa
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Norihiro Chatani
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Mina Hamano
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Takayo Takemura
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Hisao Ezaki
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Yoshihiro Kamada
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Keigo Nishida
- Laboratory for Homeostatic Network, RCAI, RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa, Japan; and
| | - Yoshikazu Nakaoka
- Department of Cardiovascular Medicine, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Shinichi Kiso
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Tetsuo Takehara
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan;
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22
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Wang W, Xu S, Yin M, Jin ZG. Essential roles of Gab1 tyrosine phosphorylation in growth factor-mediated signaling and angiogenesis. Int J Cardiol 2014; 181:180-4. [PMID: 25528308 DOI: 10.1016/j.ijcard.2014.10.148] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Revised: 09/08/2014] [Accepted: 10/18/2014] [Indexed: 12/16/2022]
Abstract
Growth factors and their downstream receptor tyrosine kinases (RTKs) mediate a number of biological processes controlling cell function. Adaptor (docking) proteins, which consist exclusively of domains and motifs that mediate molecular interactions, link receptor activation to downstream effectors. Recent studies have revealed that Grb2-associated-binders (Gab) family members (including Gab1, Gab2, and Gab3), when phosphorylated on tyrosine residues, provide binding sites for multiple effector proteins, such as Src homology-2 (SH2)-containing protein tyrosine phosphatase 2 (SHP2) and phosphatidylinositol 3-kinase (PI3K) regulatory subunit p85, thereby playing important roles in transducing RTKs-mediated signals into pathways with diversified biological functions. Here, we provide an up-to-date overview on the domain structure and biological functions of Gab1, the most intensively studied Gab family protein, in growth factor signaling and biological functions, with a special focus on angiogenesis.
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Affiliation(s)
- Weiye Wang
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, 14642, USA
| | - Suowen Xu
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, 14642, USA
| | - Meimei Yin
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, 14642, USA
| | - Zheng Gen Jin
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, 14642, USA.
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23
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Hu S, Zhang Y, Yu Y, Jin D, Zhang X, Gu S, Jia H, Chen X, Zhang Z, Jin Q, Ke Y, Liu H. Growth factor receptor bound protein 2-associated binder 2, a scaffolding adaptor protein, negatively regulates host immunity against tuberculosis. Am J Respir Cell Mol Biol 2014; 51:575-85. [PMID: 24805943 DOI: 10.1165/rcmb.2013-0329oc] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Cell-mediated immunity is indispensable for host protection against tuberculosis (TB). Growth factor receptor bound protein 2-associated binder (Gab) 2, a scaffolding adaptor protein, negatively regulates signaling pathways critical for T cell-mediated immunity. We sought to investigate the clinical significance and immunological role of Gab2 in Mycobacterium tuberculosis infection. We evaluated Gab2 protein and messenger RNA (mRNA) expression in human patients with pulmonary TB and determined the correlation of the mRNA expression pattern with antigen-specific IFN-γ secretion. Subsequently, we carried out M. tuberculosis infection in Gab2-deficient and wild-type control mice to explore the immunological role of Gab2 by examining bacterial load, histological changes, cytokine secretion, and gene expression of immune-associated transcription factors. mRNA levels of Gab2 and its correlated family member, Gab1, were markedly decreased in untreated patients with pulmonary TB compared with healthy control subjects. Importantly, this decreased Gab2 expression to normal levels after bacterial load in the patient's sputum became undetectable under the standard anti-TB treatment, which negatively correlated with the level of M. tuberculosis antigen-specific IFN-γ secretion. In the M. tuberculosis infection mouse model, infected Gab2-deficient mice exhibited decreased bacterial load and milder lung pathological damage compared with infected wild-type mice, accompanied by decreased production of IL-2, IL-6, and granulocyte/macrophage colony-stimulating factor proinflammatory cytokines, and an increased T-cell-specific T-box transcription factor/GATA binding protein 3 expression ratio. Overall, our study indicates that down-regulation of Gab2 relates to a protective function during M. tuberculosis infection, revealing a potential negative regulatory role for Gab2 in immunity to TB.
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MESH Headings
- Adaptor Proteins, Signal Transducing/genetics
- Adaptor Proteins, Signal Transducing/metabolism
- Animals
- Bacterial Load
- Case-Control Studies
- Disease Models, Animal
- GATA3 Transcription Factor/metabolism
- Host-Pathogen Interactions
- Humans
- Immunity, Cellular
- Inflammation Mediators/metabolism
- Lung/immunology
- Lung/metabolism
- Lung/pathology
- Lung/virology
- Mice
- Mice, Knockout
- Mycobacterium tuberculosis/immunology
- Mycobacterium tuberculosis/pathogenicity
- Phosphoproteins/deficiency
- Phosphoproteins/genetics
- Phosphoproteins/metabolism
- RNA, Messenger/metabolism
- TCF Transcription Factors/metabolism
- Time Factors
- Tuberculosis, Pulmonary/genetics
- Tuberculosis, Pulmonary/immunology
- Tuberculosis, Pulmonary/metabolism
- Tuberculosis, Pulmonary/pathology
- Tuberculosis, Pulmonary/prevention & control
- Tuberculosis, Pulmonary/virology
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Affiliation(s)
- Shizong Hu
- 1 Ministry of Health (MOH) Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
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24
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Haltrich I, Pikó H, Kiss E, Tóth Z, Karcagi V, Fekete G. A de novo atypical ring sSMC(22) characterized by array CGH in a boy with cat-eye syndrome. Mol Cytogenet 2014; 7:37. [PMID: 24959203 PMCID: PMC4067088 DOI: 10.1186/1755-8166-7-37] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 05/21/2014] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Microduplications 22q11 have been characterized as a genomic duplication syndrome mediated by nonallelic homologous recombination between region-specific low-copy repeats. Here we report on a 19 years old boy with intellectual disability having an unexpected structurally complex ring small supernumerary marker chromosome (sSMC) originated from a larger trisomy and a smaller tetrasomy of proximal 22q11 harboring additional copies of cat eye syndrome critical regions genes. RESULTS PRINCIPAL CLINICAL FEATURES WERE: anorectal and urogenital malformations, total anomalous pulmonary venous return with secundum ASD, hearing defect, preauricular pits, seizure and eczema. The proband also presented some rare or so far not reported clinical findings such as hyperinsulinaemia, severe immunodeficiency and grave cognitive deficits. Chromosome analysis revealed a mosaic karyotype with the presence of a small ring-like marker in 60% of cells. Array CGH detected approximately an 1,2 Mb single and a 0,2 Mb double copy gain of the proximal long arm of chromosome 22. The 1,3 Mb intervening region of chromosome 22 from centromere to the breakpoints showed no copy alteration. The karyotype of the patient was defined as 47,XY,+mar[60]/46,XY[40].ish idic r(22)(q11.1.q11.21) × 4.arr 22q11(17,435, 645-18,656,678) × 3,(17,598,642-17,799,783) × 4 dn. CONCLUSIONS The present report is the first one with a detailed description of clinical presentation in a patient carrying an atypical size ring sSMC (22) analyzed by array CGH. The specialty of the finding is emphasized by the fact that although the patient had a mosaic sSMC and the amplified region was smaller than in typical cat eye syndrome cases, the clinical presentation was severe.
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Affiliation(s)
- Irén Haltrich
- 2nd Department of Paediatrics, Semmelweis University, Tűzoltó utca 7-9, Budapest 1094, Hungary
| | - Henriett Pikó
- Department of Molecular Genetics and Diagnostics, National Institute of Environmental Health, Budapest, Hungary
| | - Eszter Kiss
- 2nd Department of Paediatrics, Semmelweis University, Tűzoltó utca 7-9, Budapest 1094, Hungary
| | - Zsuzsa Tóth
- 2nd Department of Paediatrics, Semmelweis University, Tűzoltó utca 7-9, Budapest 1094, Hungary
| | - Veronika Karcagi
- Department of Molecular Genetics and Diagnostics, National Institute of Environmental Health, Budapest, Hungary
| | - György Fekete
- 2nd Department of Paediatrics, Semmelweis University, Tűzoltó utca 7-9, Budapest 1094, Hungary
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