1
|
Teng Y, Xuan S, Jiang M, Tian L, Tian J, Chang Q. Expression of H 2S in Gestational Diabetes Mellitus and Correlation Analysis with Inflammatory Markers IL-6 and TNF- α. J Diabetes Res 2020; 2020:3085840. [PMID: 32280713 PMCID: PMC7125483 DOI: 10.1155/2020/3085840] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 02/11/2020] [Accepted: 03/04/2020] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Gestational diabetes mellitus (GDM) is a severe threat to the health of both mother and child. The pathogenesis of GDM remains unclear, although much research has found that the levels of hydrogen sulfide (H2S) play an important role in complications of pregnancy. METHODS We collected venous blood samples from parturient women and umbilical vein blood (UVB) and peripheral venous blood (PVB) samples one hour after childbirth in the control, GDM-, and GDM+ groups in order to determine the concentration of glucose and H2S in plasma; to measure levels of TNF-α, IL-1β, IL-6, TGF-β1, and ADP in parturient women and the UVB of newborns; and to find the correlation of H2S with regression. RESULTS We found that, with the elevation of glucose, the level of H2S was decreased in GDM pregnant women and newborns and the concentrations of IL-6 and TNF-α were upregulated. With regression, IL-6 and TNF-α concentrations were positively correlated with the level of blood glucose and negatively correlated with H2S concentration. CONCLUSION This study shows that downregulation of H2S participates in the pathogenesis of GDM and is of great significance in understanding the difference of H2S between normal and GDM pregnant women and newborns. This study suggests that IL-6 and TNF-α are correlated with gestational diabetes mellitus. The current study expands the knowledge base regarding H2S and provides new avenues for exploring further the pathogenesis of GDM.
Collapse
Affiliation(s)
- Yucui Teng
- Department of Obstetrics, The Second People's Hospital of Liaocheng, Linqing, Shandong Province, China 252600
| | - Shuxia Xuan
- Department of Obstetrics, The Second People's Hospital of Liaocheng, Linqing, Shandong Province, China 252600
| | - Ming Jiang
- Department of Obstetrics, The Second People's Hospital of Liaocheng, Linqing, Shandong Province, China 252600
| | - Li Tian
- Department of Obstetrics, The Second People's Hospital of Liaocheng, Linqing, Shandong Province, China 252600
| | - Jinjing Tian
- Department of Laboratory, The Second People's Hospital of Liaocheng, Linqing, Shandong Province, China 252600
| | - Qian Chang
- Department of Obstetrics, The Second People's Hospital of Liaocheng, Linqing, Shandong Province, China 252600
| |
Collapse
|
2
|
Cao L, Liang Y, Liu Y, Xu Y, Wan W, Zhu C. Pseudo-phosphorylation at AT8 epitopes regulates the tau truncation at aspartate 421. Exp Cell Res 2018; 370:103-115. [PMID: 29908160 DOI: 10.1016/j.yexcr.2018.06.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 06/10/2018] [Accepted: 06/12/2018] [Indexed: 12/21/2022]
Abstract
Tau pathology in Alzheimer's disease (AD) includes hyperphosphorylation and truncation of tau. Phosphorylation at S422 is found to suppress truncation of tau at D421 that leading to the generation of ΔTau. However, the interrelation between hyperphosphorylation and generation of ΔTau in AD remains elusive. In current study, staurosporine (Stau) induced ΔTau generation by caspases in SH-SY5Y cells with tau overexpression was found to be accompanied by a dramatic dephosphorylation at S422 and the epitope of the diagnostic antibody AT8 (S199 + S202 + T205), but a moderate dephosphorylation of PHF1 (S396 + S404) epitope. Therefore, to explore the effect of AT8 epitope on tau truncation, the residues in AT8 epitope were mutated to produce "pseudo-phosphorylated" (AT8E) or "pseudo-unphosphorylated" (AT8A) tau constructs. With Stau treatment, the generation of ΔTau from tau-AT8E was significantly attenuated comparing with that from tau-AT8A, which was S422-independent in that addition of S422A mutation still preserved this effect. Interestingly, this modulatory effect was able to be reversed by addition of PHF1E mutation. Moreover, treating the crude tau extracts with recombinant caspase-3 in vitro, also showed that ΔTau level was suppressed by AT8E, and potentiated by AT8E + PHF1E. The results primarily revealed the modulating effects of phosphorylation on ΔTau generation which may have potential implications in tau pathological processes and therapeutic intervention.
Collapse
Affiliation(s)
- Lan Cao
- State Key Laboratory of Medical Neurobiology & Institutes of Brain Science, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yan Liang
- State Key Laboratory of Medical Neurobiology & Institutes of Brain Science, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yunsheng Liu
- State Key Laboratory of Medical Neurobiology & Institutes of Brain Science, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yuxia Xu
- State Key Laboratory of Medical Neurobiology & Institutes of Brain Science, Shanghai Medical College, Fudan University, Shanghai, China
| | - Wenbin Wan
- Department of Neurology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Cuiqing Zhu
- State Key Laboratory of Medical Neurobiology & Institutes of Brain Science, Shanghai Medical College, Fudan University, Shanghai, China.
| |
Collapse
|
3
|
van Krüchten A, Wilden JJ, Niemann S, Peters G, Löffler B, Ludwig S, Ehrhardt C. Staphylococcus aureus triggers a shift from influenza virus-induced apoptosis to necrotic cell death. FASEB J 2018; 32:2779-2793. [PMID: 29401589 DOI: 10.1096/fj.201701006r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Superinfections with Staphylococcus aureus are a major complication of influenza disease, causing excessive inflammation and tissue damage. This enhanced cell-damaging effect is also observed in superinfected tissue cultures, leading to a strong decrease in overall cell viability. In our analysis of the underlying molecular mechanisms, we observed that, despite enhanced cell damage in superinfection, S. aureus did not increase but rather inhibited influenza virus (IV)-induced apoptosis in cells on the level of procaspase-8 activation. This apparent contradiction was solved when we observed that S. aureus mediated a switch from apoptosis to necrotic cell death of IV-infected cells, a mechanism that was dependent on the bacterial accessory gene regulator ( agr) locus that promotes bacterial survival and spread. This so far unknown action may be a bacterial strategy to enhance dissemination of intracellular S. aureus and may thereby contribute to increased tissue damage and severity of disease.-Van Krüchten, A., Wilden, J. J., Niemann, S., Peters, G., Löffler, B., Ludwig, S., Ehrhardt, C. Staphylococcus aureus triggers a shift from influenza virus-induced apoptosis to necrotic cell death.
Collapse
Affiliation(s)
- Andre van Krüchten
- Institute of Virology (IVM), Westfaelische Wilhelms-University (WWU) Münster, Muenster, Germany.,Institute of Medical Microbiology, WWU Münster, Münster, Germany
| | - Janine J Wilden
- Institute of Virology (IVM), Westfaelische Wilhelms-University (WWU) Münster, Muenster, Germany
| | - Silke Niemann
- Institute of Medical Microbiology, WWU Münster, Münster, Germany
| | - Georg Peters
- Institute of Medical Microbiology, WWU Münster, Münster, Germany.,Cluster of Excellence EXC 1003, Cells in Motion Interfaculty Centre, WWU Münster, Muenster, Germany; and
| | - Bettina Löffler
- Institute of Medical Microbiology, Jena University Hospital, Jena, Germany
| | - Stephan Ludwig
- Institute of Virology (IVM), Westfaelische Wilhelms-University (WWU) Münster, Muenster, Germany.,Cluster of Excellence EXC 1003, Cells in Motion Interfaculty Centre, WWU Münster, Muenster, Germany; and
| | - Christina Ehrhardt
- Institute of Virology (IVM), Westfaelische Wilhelms-University (WWU) Münster, Muenster, Germany.,Cluster of Excellence EXC 1003, Cells in Motion Interfaculty Centre, WWU Münster, Muenster, Germany; and
| |
Collapse
|
4
|
Zhou Y, Chang R, Ji W, Wang N, Qi M, Xu Y, Guo J, Zhan L. Loss of Scribble Promotes Snail Translation through Translocation of HuR and Enhances Cancer Drug Resistance. J Biol Chem 2015; 291:291-302. [PMID: 26527679 PMCID: PMC4697165 DOI: 10.1074/jbc.m115.693853] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Indexed: 11/30/2022] Open
Abstract
Drug resistance of cancer cells to various therapeutic agents and molecular targets is a major problem facing current cancer research. The tumor suppressor gene Scribble encodes a polarity protein that is conserved between Drosophila and mammals; loss of the locus disrupts cell polarity, inhibits apoptosis, and mediates cancer process. However, the role of Scribble in drug resistance remains unknown. We show here that knockdown of Scribble enhances drug resistance by permitting accumulation of Snail, which functions as a transcription factor during the epithelial-mesenchymal transition. Then, loss of Scribble activates the mRNA-binding protein human antigen R (HuR) by facilitating translocation of HuR from the nucleus to the cytoplasm. Furthermore, we demonstrate HuR can recognize AU-rich elements of the Snail-encoding mRNA, thereby regulating Snail translation. Moreover, loss of Scribble-induced HuR translocation mediates the accumulation of Snail via activation of the p38 MAPK pathway. Thus, this work clarifies the role of polarity protein Scribble, which is directly implicated in the regulation of developmental transcription factor Snail, and suggesting a mechanism for Scribble mediating cancer drug resistance.
Collapse
Affiliation(s)
- Yi Zhou
- From the Key Laboratory of Nutrition and Metabolism, Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Renxu Chang
- From the Key Laboratory of Nutrition and Metabolism, Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Weiwei Ji
- From the Key Laboratory of Nutrition and Metabolism, Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Na Wang
- From the Key Laboratory of Nutrition and Metabolism, Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Meiyan Qi
- From the Key Laboratory of Nutrition and Metabolism, Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Yi Xu
- From the Key Laboratory of Nutrition and Metabolism, Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Jingyu Guo
- From the Key Laboratory of Nutrition and Metabolism, Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Lixing Zhan
- From the Key Laboratory of Nutrition and Metabolism, Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| |
Collapse
|
5
|
Zhao D, Yuan H, Yi F, Meng C, Zhu Q. Autophagy prevents doxorubicin‑induced apoptosis in osteosarcoma. Mol Med Rep 2014; 9:1975-81. [PMID: 24639013 DOI: 10.3892/mmr.2014.2055] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2013] [Accepted: 02/10/2014] [Indexed: 11/05/2022] Open
Abstract
Autophagy is a process of selective degradation of cellular components. Autophagy is an adaptive process in the majority of tumor cells; it provides sufficient nutrients by degrading cellular components to enhance the survival of tumors. Osteosarcoma is the most common type of primary malignant bone tumor in children and adolescents. Identification of an improved therapeutic strategy for the treatment of osteosarcoma is urgently required. Osteosarcoma has been primarily treated by chemotherapy and the phenomena of resistance to the therapy has become increasingly common. Doxorubicin (Dox) is a classic chemotherapeutic drug for the treatment of osteosarcoma, and certain studies have suggested that Dox induces autophagy. On the basis of the protective effect of autophagy for tumors, the present study investigated whether U2OS and Saos-2 osteosarcoma cells activate autophagy to reduce Dox-induced apoptosis. Dox was observed to inhibit the growth of U2OS and Saos-2 osteosarcoma cells in a concentration-dependent manner. The results of the western blot analysis demonstrated that Dox induced increased expression levels of the apoptosis-related proteins cleaved caspase-3 and cytochrome c and loss of mitochondrial membrane potential (MMP) in the U2OS and Saos-2 osteosarcoma cells. Furthermore, the results of the western blot analysis also revealed that Dox increased the expression levels of the autophagy-related protein microtubule-associated protein 1 light chain 3 and reduced those of p62 in the U2OS and Saos-2 osteosarcoma cells. In order to determine the effect of autophagy on the apoptosis induced by Dox in the U2OS and Saos-2 osteosarcoma cells, autophagy-related protein (Atg)7 small interfering (si) RNA or the autophagy inhibitor 3-methyladenine (3-MA) alone or combined with Dox was used in U2OS and Saos-2 osteosarcoma cells. The results identified that Atg7 siRNA and the autophagy inhibitor 3-MA significantly elevated the levels of growth inhibition by Dox and markedly increased the expression levels of the apoptosis‑related proteins cleaved caspase-3 and cytochrome c, and reduced the levels of MMP in the U2OS and Saos-2 osteosarcoma cells, which were treated with Dox. These results indicated that autophagy was the protective mechanism used by U2OS and Saos-2 osteosarcoma against Dox-induced apoptosis. The inhibition of autophagy notably increases the levels of apoptosis induced by Dox. This suggested that Dox used in combination with autophagy inhibitors may effectively treat osteosarcoma.
Collapse
Affiliation(s)
- Dongxu Zhao
- Department of Spine Surgery, The First Bethune Hospital, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Hongping Yuan
- Department of Nephrology, The Fourth Bethune Hospital, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Fei Yi
- Department of Spine Surgery, The First Bethune Hospital, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Chunyang Meng
- Department of Spine Surgery, The First Bethune Hospital, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Qingsan Zhu
- Department of Spine Surgery, The First Bethune Hospital, Jilin University, Changchun, Jilin 130021, P.R. China
| |
Collapse
|