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Kang T, Qin X, Lei Q, Yang Q. BRAP silencing protects against neuronal inflammation, oxidative stress and apoptosis in cerebral ischemia-reperfusion injury by promoting PON1 expression. ENVIRONMENTAL TOXICOLOGY 2023; 38:2645-2655. [PMID: 37647369 DOI: 10.1002/tox.23899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 07/06/2023] [Indexed: 09/01/2023]
Abstract
BACKGROUND BRCA1 associated protein (BRAP) participates in the regulation of myocardial infarction and atherosclerosis. But the function of BRAP in cerebral ischemia-reperfusion (CIR) injury has not been elucidated yet. METHODS BRAP expression in PC12 cells in response to oxygen-glucose deprivation/reoxygenation (OGD/R) treatment was examined with Western blot assay. PC12 cells underwent OGD/R-treatment and were subsequently transfected with pcDNA-BRAP or sh-BRAP, followed by determination of viability, lactate dehydrogenase (LDH) production, apoptosis, inflammatory cytokine secretion, and oxidative stress marker protein levels. Paraoxonase 1 (PON1) promoter methylation was evaluated with methylation-specific PCR assay. the effect of BRAP/PON1 axis on CIR injury was investigated by rescue experiments. Additionally, sh-BRAP was injected into a middle cerebral artery occlusion (MCAO) rat model, and the changes of neurological damage were evaluated. RESULTS BRAP overexpression exacerbated OGD/R-induced viability reduction, LDH production, apoptosis, inflammatory cytokine secretion and oxidative stress in PC12 neuronal cells. In contrast, BRAP silencing showed the opposite results. Mechanistically, BRAP reduced PON1 expression by promoting DNA methyl transferase1 (DNMT1)-mediated PON1 promoter methylation. PON1 silencing reversed BRAP-mediated neuroprotection. Additionally, BRAP silencing alleviated CIR-induced neurological damage in MCAO rats. CONCLUSION BRAP silencing suppressed OGD/R-induced neuronal apoptosis, inflammation, and oxidative stress, and alleviated CIR-induced neurological damage in MCAO rats through facilitating PON1 expression.
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Affiliation(s)
- Tao Kang
- Department of Neurology, Shaanxi Provincial People's Hospital, Xi'an, China
| | - Xiao Qin
- Department of Neurology, Shaanxi Provincial People's Hospital, Xi'an, China
| | - Qi Lei
- Department of Neurology, Shaanxi Provincial People's Hospital, Xi'an, China
| | - Qian Yang
- Department of Neurology, Shaanxi Provincial People's Hospital, Xi'an, China
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Shimizu Y, Maeda T. Influence of height on endothelial maintenance activity: a narrative review. Environ Health Prev Med 2021; 26:19. [PMID: 33549053 PMCID: PMC7866474 DOI: 10.1186/s12199-021-00941-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 01/24/2021] [Indexed: 12/25/2022] Open
Abstract
Recent studies have revealed an inverse association between height and cardiovascular disease. However, the background mechanism of this association has not yet been clarified. Height has also been reported to be positively associated with cancer. Therefore, well-known cardiovascular risk factors, such as increased oxidative stress and chronic inflammation, are not the best explanations for this inverse association because these risk factors are also related to cancer. However, impaired blood flow is the main pathological problem in cardiovascular disease, while glowing feeding vessels (angiogenesis) are the main characteristic of cancer pathologies. Therefore, endothelial maintenance activity, especially for the productivity of hematopoietic stem cells such as CD34-positive cells, could be associated with the height of an individual because this cell contributes not only to the progression of atherosclerosis but also to the development of angiogenesis. In addition, recent studies have also revealed a close connection between bone marrow activity and endothelial maintenance; bone marrow-derived hematopoietic stem cells contribute towards endothelial maintenance. Since the absolute volume of bone marrow is positively associated with height, height could influence endothelial maintenance activity. Based on these hypotheses, we performed several studies. The aim of this review is not only to discuss the association between height and bone marrow activity, but also to describe the potential mechanism underlying endothelial maintenance. In addition, this review also aims to explain some of the reasons that implicate hypertension as a major risk factor for stroke among the Japanese population. The review also aims to clarify the anthropological reasons behind the high risk of atherosclerosis progression in Japanese individuals with acquired genetic characteristics.
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Affiliation(s)
- Yuji Shimizu
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Sakamoto 1-12-4, Nagasaki, 852-8523, Japan. .,Department of Cardiovascular Disease Prevention, Osaka Center for Cancer and Cardiovascular Diseases Prevention, Osaka, Japan.
| | - Takahiro Maeda
- Department of General Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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Wei X, Liu X, Liu H, He X, Zhuang H, Tang Y, Wang B. BRCA1-associated protein induced proliferation and migration of gastric cancer cells through MAPK pathway. Surg Oncol 2020; 35:191-199. [PMID: 32890957 DOI: 10.1016/j.suronc.2020.08.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 07/22/2020] [Accepted: 08/02/2020] [Indexed: 11/29/2022]
Abstract
BRCA1-associated protein (BRAP) was first found to bind to the nuclear localization signal motifs of BRCA1. In this study, we investigated the role of BRAP in gastric cancer. The cancer genome atlas(TCGA) data were obtained from UALCAN. We downregulated and upregulated the level of BRAP in gastric cancer cells by transfection with shRNAs and plasmids. Then, we evaluated the expression of BRAP by qRT-PCR and investigated the expression of important proteins by Western blot analysis. We conducted a microarray analysis to identify the function of BRAP in gastric cancer cells. Then, we investigated the effect of BRAP on proliferation and migration by CCK-8 assays, colony formation assays, wound healing assays and an extreme limiting dilution analysis. The analysis of TCGA data showed that BRAP was significantly overexpressed in gastric cancer tissues compared to that in normal gastric mucosal tissues (P < 0.001). A hybridization-based microarray assay was used to analyze MGC-803 cells and BRAP-downregulated MGC-803 cells. We found 22,199 protein-coding RNAs that were differentially expressed. The genes in the two groups were analyzed with the Kyoto Encyclopedia of Genes and Genomes (KEGG) database, and both the focal adhesion and MAPK pathways were significantly enriched. The results of Cell Counting Kit-8(CCK-8) assays, colony formation assays, wound healing assays and the extreme limiting dilution analysis showed that the knockdown of BRAP reduced gastric cancer cell proliferation and migration and inhibited the process of epithelial-mesenehymal transition (EMT). The overexpression of BRAP induced gastric cancer cell proliferation, migration and the process of EMT. To verify the function of the mitogen-activated protein kinase (MAPK) signaling pathway, we performed a Western blot analysis. The results showed that the downregulation of BRAP decreased the levels of p-ERK and p-Raf1, thereby decreasing the activity of the MAPK signaling pathway. The use of Honokiol increased the levels of p-ERK and p-Raf1, rescuing the function of BRAP downregulation in the MAPK pathway. Xenograft tumor transplantation experiments in nude mice further confirmed the role of BRAP in gastric cancer progression and metastasis.
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Affiliation(s)
- Xiaodong Wei
- Department of Gastroenterology, Tianjin Nankai Hospital, Tianjin, 300100, PR China; Tianjin Key Laboratory of Acute Abdomen Disease Associated Organ Injury and ITCWM Repair, Tianjin, 300100, PR China
| | - Xi Liu
- Department of Gastroenterology, Tianjin Nankai Hospital, Tianjin, 300100, PR China; Tianjin Key Laboratory of Acute Abdomen Disease Associated Organ Injury and ITCWM Repair, Tianjin, 300100, PR China
| | - Huimin Liu
- Department of Gastroenterology, Tianjin Medical University General Hospital, Tianjin, 300052, PR China
| | - Xin He
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Hao Zhuang
- Department of Hepatic Biliary Pancreatic Surgery, Cancer Hospital Affiliated to Zhengzhou University, Zhengzhou, Henan, 450008, PR China.
| | - Yanping Tang
- Department of Gastroenterology, Tianjin Nankai Hospital, Tianjin, 300100, PR China; Tianjin Key Laboratory of Acute Abdomen Disease Associated Organ Injury and ITCWM Repair, Tianjin, 300100, PR China.
| | - Bo Wang
- Department of Neurosurgery, Tianjin Huanhu Hospital, Tianjin Key Laboratory of Cerebral Vascular and Neurodegenerative Diseases, Tianjin Neurosurgical Institute, Tianjin, 300050, China.
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Potential mechanisms underlying the association between single nucleotide polymorphism (BRAP and ALDH2) and hypertension among elderly Japanese population. Sci Rep 2020; 10:14148. [PMID: 32843694 PMCID: PMC7447746 DOI: 10.1038/s41598-020-71031-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 08/03/2020] [Indexed: 11/23/2022] Open
Abstract
Minor allele frequency (MAF) of rs3782886 (BRAP) and rs671 (ALDH2) are reported to be inversely associated with blood pressure. Another study revealed that hematopoietic activity which is evaluated by reticulocytes could influenced on hypertension status partly by indicating activity of endothelial maintenance. Therefore, to evaluate the association between genetic factor and hypertension, influence of hematopoietic activity should be considered. A multi-faced analysis was performed in a simple general elderly population model (1,313 older Japanese aged 60–98 years). Participants were stratified by median values of reticulocytes (5.21 × 104 cells/μL for men and 4.65 × 104 cells/μL for women). Independent of known cardiovascular risk factors, MAF of rs3782886 and rs671 are significantly inversely associated with hypertension for participants with high hematopoietic activity (high reticulocytes level) (fully adjusted odds ratio (ORs) were 0.72 (0.55, 0.96) for rs3782886 and 0.72 (0.54, 0.96) for rs671) but not for low reticulocytes count (the corresponding values were 1.05 (0.79, 1.39) and 1.08 (0.81, 1.45), respectively). Hematopoietic activity evaluated by reticulocytes levels could influence on the association between single nucleotide polymorphism (rs3782886 and rs671) and hypertension. Those results were efficient tool to clarify the part of the mechanism that underlying the association between genetic factor and hypertension.
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Abstract
Patients with psychotic disorders are at high risk for type 2 diabetes mellitus, and there is increasing evidence that patients display glucose metabolism abnormalities before significant antipsychotic medication exposure. In the present study, we examined insulin action by quantifying insulin sensitivity in first-episode psychosis (FEP) patients and unaffected siblings, compared to healthy individuals, using a physiological-based model and comprehensive assessment battery. Twenty-two unaffected siblings, 18 FEP patients, and 15 healthy unrelated controls were evaluated using a 2-h oral glucose tolerance test (OGTT), with 7 samples of plasma glucose and serum insulin concentration measurements. Insulin sensitivity was quantified using the oral minimal model method. Lipid, leptin, free fatty acids, and inflammatory marker levels were also measured. Anthropometric, nutrient, and activity assessments were conducted; total body composition and fat distribution were determined using whole-body dual-energy X-ray absorptiometry. Insulin sensitivity significantly differed among groups (F = 6.01 and 0.004), with patients and siblings showing lower insulin sensitivity, compared to controls (P = 0.006 and 0.002, respectively). Body mass index, visceral adipose tissue area (cm2), lipids, leptin, free fatty acids, inflammatory markers, and activity ratings were not significantly different among groups. There was a significant difference in nutrient intake with lower total kilocalories/kilogram body weight in patients, compared to siblings and controls. Overall, the findings suggest that familial abnormal glucose metabolism or a primary insulin signaling pathway abnormality is related to risk for psychosis, independent of disease expression and treatment effects. Future studies should examine underlying biological mechanisms of insulin signaling abnormalities in psychotic disorders.
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Shimizu Y, Yamanashi H, Noguchi Y, Koyamatsu J, Nagayoshi M, Kiyoura K, Fukui S, Tamai M, Kawashiri SY, Arima K, Maeda T. Short stature-related single-nucleotide polymorphism (SNP) activates endothelial repair activity in elderly Japanese. Environ Health Prev Med 2019; 24:26. [PMID: 31043174 PMCID: PMC6495505 DOI: 10.1186/s12199-019-0780-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 04/09/2019] [Indexed: 01/17/2023] Open
Abstract
Background Hypertension and atherosclerosis are bidirectionally related, while platelet count could serve as an indicator of endothelial repair. Therefore, high platelet counts could be associated with hypertension by indicating more intense endothelial repair activity. Furthermore, short stature has been shown to constitute a risk of atherosclerosis. Since inflammation-related single-nucleotide polymorphism (SNP (rs3782886)) is reportedly associated with myocardial infarction and short stature, rs3782886 could be associated with a high platelet count and thus more intense endothelial repair activity. Methods We conducted a cross-sectional study of 988 elderly Japanese who participated in a general health check-up. Short stature was defined as a height of at or under the 25th percentile of the study population, and high platelet count as the highest tertiles of the platelet levels. Results High platelet counts were found to be independently and positively associated with hypertension while rs3782886 was independently associated with high platelet levels and short stature. The classical cardiovascular risk factor-adjusted odds ratio (OR) and 95% confidence interval (CI) of high platelet count for hypertension was 1.34 (1.02, 1.77). With non-minor homo of the rs3782886 as the reference group, the adjusted OR and 95% CI for high platelet count and short stature of minor home were 2.40 (1.30, 4.42) and 2.21 (1.16, 4.21), respectively. Conclusion SNP (rs3782886) was shown to be associated with high platelet count and short stature. This result partly explains how a genetic factor can influence the impact of height on endothelial repair.
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Affiliation(s)
- Yuji Shimizu
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Sakamoto 1-12-4, Nagasaki, 852-8523, Japan. .,Department of Cardiovascular Disease Prevention, Osaka Center for Cancer and Cardiovascular Disease Prevention, Osaka, Japan.
| | - Hirotomo Yamanashi
- Department of General Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - Yuko Noguchi
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Sakamoto 1-12-4, Nagasaki, 852-8523, Japan
| | - Jun Koyamatsu
- Department of Island and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Mako Nagayoshi
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Sakamoto 1-12-4, Nagasaki, 852-8523, Japan
| | - Kairi Kiyoura
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Sakamoto 1-12-4, Nagasaki, 852-8523, Japan
| | - Shoichi Fukui
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Sakamoto 1-12-4, Nagasaki, 852-8523, Japan
| | - Mami Tamai
- Department of Immunology and Rheumatology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Shin-Ya Kawashiri
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Sakamoto 1-12-4, Nagasaki, 852-8523, Japan
| | - Kazuhiko Arima
- Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Takahiro Maeda
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Sakamoto 1-12-4, Nagasaki, 852-8523, Japan.,Department of General Medicine, Nagasaki University Hospital, Nagasaki, Japan.,Department of Island and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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Premature ovarian aging in BRCA carriers: a prototype of systemic precocious aging? Oncotarget 2018; 9:15931-15941. [PMID: 29662617 PMCID: PMC5882308 DOI: 10.18632/oncotarget.24638] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 02/27/2018] [Indexed: 11/25/2022] Open
Abstract
Purpose Though former evidence implies a correlation of breast cancer susceptibility gene (BRCA) mutation with reduced ovarian reserve, the data is yet inconsistent. Our aim was to investigate biomarkers of ovarian aging in a cohort of young healthy carriers of the BRCA mutation. We hypothesized that the role played by BRCA genes in aging pathways is not exclusive to the ovary. Experimental Design Healthy female BRCA carriers, 40 years or younger and healthy male BRCA carriers, 50 years or younger, were enrolled in the study. Serum anti-mullerian Hormone (AMH), fibroblast growth factor-23 (FGF-23), Klotho and IL-1 were measured by enzyme-linked immunosorbent assay (ELISA). Ovarian AMH and protein kinase B (AKT) mRNA from BRCA carriers who underwent prophylactic oophorectomy and from age-matched, healthy, non-carriers who underwent partial oophorectomy due to benign conditions were analyzed by qPCR. Results Thirty-three female (median age 35y) and 20 male (44y) BRCA carriers were enrolled into the study and matched to control non-carriers (34y and 43y, respectively). Serum AMH level was significantly lower in BRCA female carriers than in both non-carrier controls and age-matched nomograms. The levels of ovarian AMH and AKT mRNA were significantly lower in carriers than in controls. The systemic aging cytokines FGF-23, klotho and IL-1 displayed a differential expression in carriers of both genders. FGF-23 level was higher in carriers (P=0.06). Conclusions Our results suggest a link between BRCA mutation, accelerated ovarian aging and systemic aging-related pathophysiology.
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Affiliation(s)
- Rajesh Ranganath
- Department of Computer Science, Princeton University, Princeton, NJ
| | - David M. Blei
- Departments of Computer Science and Statistics, Columbia University, New York, NY
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Association of the type 2 diabetes mellitus susceptibility gene (IGF2BP2) with schizophrenia in an Egyptian sample. MIDDLE EAST CURRENT PSYCHIATRY 2017. [DOI: 10.1097/01.xme.0000513071.88010.21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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