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Michalczyk K, Kapczuk P, Witczak G, Tousty P, Bosiacki M, Kurzawski M, Chlubek D, Cymbaluk-Płoska A. An Assessment of MT1A (rs11076161), MT2A (rs28366003) and MT1L (rs10636) Gene Polymorphisms and MT2 Concentration in Women with Endometrial Pathologies. Genes (Basel) 2023; 14:genes14030773. [PMID: 36981043 PMCID: PMC10048541 DOI: 10.3390/genes14030773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/13/2023] [Accepted: 03/21/2023] [Indexed: 03/30/2023] Open
Abstract
Several studies have indicated a relationship between metallothionein (MT) polymorphisms and the development of different pathologies, including neoplastic diseases. However, no studies thus far have been conducted on the influence of MT polymorphisms and the development of endometrial lesions, including endometrial cancer. This study included 140 patients with normal endometrial tissue, endometrial polyps, uterine myomas and endometrial cancer. The tissue MT2 concentration was determined using the ELISA method. MT1A, MT2A and MT1L polymorphisms were analyzed using TaqMan real-time PCR genotyping assays. We found no statistical difference between the tissue MT2 concentration in patients with EC vs. benign endometrium (p = 0.579). However, tissue MT2 concentration was significantly different between uterine fibromas and normal endometrial tissue samples (p = 0.019). Menopause status did not influence the tissue MT2 concentration (p = 0.282). There were no significant associations between the prevalence of MT1A, MT2A and MT1L polymorphisms and MT2 concentration. The age, menopausal status, and diabetes status of patients were identified as EC risk factors.
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Affiliation(s)
- Kaja Michalczyk
- Department of Gynecological Surgery and Gynecological Oncology of Adults and Adolescents, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland
| | - Patrycja Kapczuk
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72, 70-111 Szczecin, Poland
| | - Grzegorz Witczak
- Department of Gynecological Surgery and Gynecological Oncology of Adults and Adolescents, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland
| | - Piotr Tousty
- Department of Obstetrics and Gynecology, Pomeranian Medical University, Powstańców Wielkopolskich 72, 70-111 Szczecin, Poland
| | - Mateusz Bosiacki
- Department of Functional Diagnostics and Physical Medicine, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland
| | - Mateusz Kurzawski
- Department of Experimental and Clinical Pharmacology, Pomeranian Medical University in Szczecin, Powstancow Wielkopolskich 72, 70-111 Szczecin, Poland
| | - Dariusz Chlubek
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72, 70-111 Szczecin, Poland
| | - Aneta Cymbaluk-Płoska
- Department of Reconstructive Surgery and Gynecological Oncology, Pomeranian Medical University in Szczecin, Al. Powstańców Wielkopolskich 72, 70-111 Szczecin, Poland
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Qin S, Li B, Li R, Cai Y, Zheng K, Huang H, Xiao F, Zeng M, Xu X. Proteomic characteristics and identification of PM 2.5-induced differentially expressed proteins in hepatocytes and c-Myc silenced hepatocytes. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 209:111838. [PMID: 33387776 DOI: 10.1016/j.ecoenv.2020.111838] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 12/16/2020] [Accepted: 12/19/2020] [Indexed: 06/12/2023]
Abstract
Proteomics and bioinformatics were applied to explore PM2.5-induced differentially expressed proteins (DEPs) in hepatocytes (L02 cells) and c-Myc-silenced hepatocytes. L02 cells and c-Myc-silenced hepatocytes were treated with PM2.5 for 24 h. Fifty-two DEPs were screened in L02 hepatocytes, of which 28 were upregulated and 24 were downregulated. Forty-one DEPs were screened in the c-Myc-silenced hepatocytes, of which 31 were upregulated and 10 were downregulated. GO analysis showed that DEPs in L02 cells were mainly concentrated in the cytosol and were involved in biological processes such as the response to metal ions. DEPs in c-Myc-silenced cells were mainly enriched in the extracellular space and were involved in lipoprotein metabolism. KEGG analysis showed that DEPs in L02 cells were mainly involved in arachidonic acid metabolism and mineral absorption. DEPs in c-Myc-silenced cells were mainly enriched in pathways involving nerve absorption, complement and coagulation cascades, and other pathways. Twenty key proteins, including Metallothionein-2A (MT2A), Metallothionein-1X (MT1X), zinc transporter ZIP10 (SLC39A10) and Serine protease 23 (PRSS23) were screened in two groups through analysis of protein-protein interactions. Based on the identification of the selected DEPs, PRSS23 and SLC39A10 might be the potential biomarker of PM2.5-induced carcinogenesis, which provide the scientific basis for further research into the carcinogenic mechanisms of PM2.5.
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Affiliation(s)
- Shuangjian Qin
- Xiangya School of Public Health, Central South University, Changsha, Hunan 410078, China; Institute of environment and health, Shenzhen center for disease control and prevention, Shenzhen, Guangdong 518055, China
| | - Boru Li
- Xiangya School of Public Health, Central South University, Changsha, Hunan 410078, China; Institute of environment and health, Shenzhen center for disease control and prevention, Shenzhen, Guangdong 518055, China
| | - Runbing Li
- Institute of environment and health, Shenzhen center for disease control and prevention, Shenzhen, Guangdong 518055, China; School of public health, University of South China, Hengyang, Hunan 421001, China
| | - Ying Cai
- Institute of environment and health, Shenzhen center for disease control and prevention, Shenzhen, Guangdong 518055, China; School of public health, University of South China, Hengyang, Hunan 421001, China
| | - Kai Zheng
- Institute of environment and health, Shenzhen center for disease control and prevention, Shenzhen, Guangdong 518055, China; School of public health, University of South China, Hengyang, Hunan 421001, China
| | - Haiyan Huang
- Institute of environment and health, Shenzhen center for disease control and prevention, Shenzhen, Guangdong 518055, China
| | - Fang Xiao
- Xiangya School of Public Health, Central South University, Changsha, Hunan 410078, China.
| | - Ming Zeng
- Xiangya School of Public Health, Central South University, Changsha, Hunan 410078, China.
| | - Xinyun Xu
- Institute of environment and health, Shenzhen center for disease control and prevention, Shenzhen, Guangdong 518055, China.
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Singh P, Mitra P, Goyal T, Kumar PVK, Sharma S, Sharma P. Effect of metallothionein 1A rs8052394 polymorphism on lead, cadmium, zinc, and aluminum levels in factory workers. Toxicol Ind Health 2020; 36:816-822. [PMID: 32816651 DOI: 10.1177/0748233720947518] [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] [Indexed: 01/01/2023]
Abstract
Metallothioneins (MTs) are low molecular weight cysteine-rich, metal-binding proteins. They are involved in transportation and detoxification of heavy metals, homeostasis of essential metals, and as antioxidation against reactive oxygen species. Polymorphisms in a gene may increase or decrease the expression efficiency of a gene. This study aimed to determine the genetic effect of MT1A rs8052394 on lead (Pb), cadmium (Cd), zinc (Zn), and aluminum (Al) levels in factory workers. The study included 100 occupationally heavy metal exposed workers from different factories around Jodhpur. Pb, Cd, Zn, and Al levels were measured by atomic absorption spectrophotometry. Individuals with the GG genotype had lower Pb, Zn, and Al levels and higher Cd levels than AA and AG genotypes. The genotyping of MT1A rs8052394 was done by the polymerase chain reaction-restriction fragment length polymorphism method (PCR-RFLP). The mean ± standard deviation of Pb, Cd, Zn, and Al was 5.88 ± 13.28 µg/dL, 3.52 ± 1.25 µg/L, 16.45 ± 16.69 µg/dL, and 58.92 ± 58.91 µg/L, respectively. A significant association was found between single-nucleotide polymorphisms (SNPs) of MT1A gene and Cd (p = 0.006) and with Zn levels (p = 0.031) but no association found with Pb and Al levels. Among the study population, 78 participants were homozygote major (AA), 19 were heterozygote (AG), and 3 were homozygote minor (GG). The χ 2 test presented the genotypic distribution of all three genotypes under the Hardy-Weinberg equilibrium (p > 0.05). The frequency of the A allele was 87.5% (175) and the G allele was 12.5% (25). To conclude, polymorphism in rs8052394 of the MT1A gene is associated with increased metal accumulation which in turn may lead to increased toxic effects in the exposed individuals. Factory workers thus, should be more cautious about protecting their health against the toxic effects of heavy metals.
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Affiliation(s)
- Preeti Singh
- Department of Biochemistry, 410730All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Prasenjit Mitra
- Department of Biochemistry, 410730All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Taru Goyal
- Department of Biochemistry, 410730All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Pilla Vsn Kiran Kumar
- Department of Biochemistry, 410730All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Shailja Sharma
- Department of Biochemistry, 410730All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Praveen Sharma
- Department of Biochemistry, 410730All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
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Liu Z, Ye Q, Wu L, Gao F, Xie H, Zhou L, Zheng S, Xu X. Metallothionein 1 family profiling identifies MT1X as a tumor suppressor involved in the progression and metastastatic capacity of hepatocellular carcinoma. Mol Carcinog 2018; 57:1435-1444. [PMID: 29873415 DOI: 10.1002/mc.22846] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Revised: 05/14/2018] [Accepted: 06/01/2018] [Indexed: 12/20/2022]
Abstract
Metallothionein 1 (MT1s) is a family of cysteine-rich proteins with diverse functions such as metal homeostasis, oxidative stress, and carcinogenesis. However, its involvement in hepatocellular carcinoma (HCC) remains not fully understood. We aimed to explore the contribution of the individual member of MT1s to HCC. Its member mRNA levels were determined in cohort 1 of normal (n = 30), cirrhotic (n = 30), peritumoral (n = 135), and HCC (n = 135). In cohort 1, seven of eight members were down-regulated during the transition from normal liver to HCC, and only MT1G and MT1X were correlated with tumor features and outcomes. The MT1X was selected to be further stained in cohort 2 consisting of a series of liver nodules (15 normal livers, 33 cirrhotic livers, 12 dysplastic nodules, 31 HCC, and 9 HCC metastasis), and in cohort 3 (HCC, n = 85). In cohort 2, MT1X immunoreactivity was reduced in HCC and lost in metastatic HCC and showed good diagnostic performance for HCC (AUC = 0.754, 95%IC = 0.659-0.849). In cohort 3, MT1X expression in peritumoral tissues was independent predictor for HCC (recurrence free survival: HR = 0.34, 95%CI = 0.17-0.66; overall survival: HR = 0.32, 95%CI = 0.16-0.60). Moreover, we found that ectopic overexpression of MT1X delayed G1/S progression of cell cycle and promoted apoptosis in HCC cells in vitro, and suppressed tumor growth and lung metastasis in nude mice in vivo. We further demonstrated that MT1X induces cell cycle arrest and apoptosis by inactivating NF-κB signaling in HCC. In conclusion, MT1X may serve as a candidate of prognostic indicator and inhibits the progression and metastasis of HCC.
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Affiliation(s)
- Zhikun Liu
- Division of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Key Lab of Combined Multi-Organ Transplantation, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Ministry of Public Health, Hangzhou, China
| | - Qianwei Ye
- Key Lab of Combined Multi-Organ Transplantation, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Ministry of Public Health, Hangzhou, China
| | - Lingjiao Wu
- Key Lab of Combined Multi-Organ Transplantation, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Ministry of Public Health, Hangzhou, China
| | - Feng Gao
- Division of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Key Lab of Combined Multi-Organ Transplantation, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Ministry of Public Health, Hangzhou, China
| | - Haiyang Xie
- Key Lab of Combined Multi-Organ Transplantation, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Ministry of Public Health, Hangzhou, China
| | - Lin Zhou
- Key Lab of Combined Multi-Organ Transplantation, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Ministry of Public Health, Hangzhou, China
| | - Shusen Zheng
- Division of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Key Lab of Combined Multi-Organ Transplantation, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Ministry of Public Health, Hangzhou, China
| | - Xiao Xu
- Division of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Key Lab of Combined Multi-Organ Transplantation, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Ministry of Public Health, Hangzhou, China
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Genetic polymorphisms (rs10636 and rs28366003) in metallothionein 2A increase breast cancer risk in Chinese Han population. Aging (Albany NY) 2017; 9:547-555. [PMID: 28228606 PMCID: PMC5361680 DOI: 10.18632/aging.101177] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 02/09/2017] [Indexed: 12/22/2022]
Abstract
Genetic polymorphisms of MT2A are frequently observed in many different cancers. We performed this case-control study, including 459 breast cancer (BC) patients and 549 healthy controls from Northwest China, to evaluate the associations between two common MT2A polymorphisms (rs10636 and rs28366003) and BC risk. The MT2A polymorphisms were genotyped via Sequenom MassARRAY. The individuals with the rs28366003 A/G, A/G-G/G genotypes underwent a higher risk of BC (P<0.0001). And, the minor allele G of rs28366003 was related to an increased BC risk (P<0.0001). We also found a significantly increased BC risk with rs10636 polymorphism among homozygote and recessive models (P<0.05). Further subgroup analysis by clinical characteristics of BC patients showed that Scarff, Bloom and Richardson tumor grade (SBR) 1-2 have a higher expression of the minor allele of these two MT2A loci than SBR 3. Our results indicated that the rs10636 and rs28366003 polymorphisms in MT2A increased BC risk in Northwest Chinese Han population.
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Krizkova S, Kepinska M, Emri G, Eckschlager T, Stiborova M, Pokorna P, Heger Z, Adam V. An insight into the complex roles of metallothioneins in malignant diseases with emphasis on (sub)isoforms/isoforms and epigenetics phenomena. Pharmacol Ther 2017; 183:90-117. [PMID: 28987322 DOI: 10.1016/j.pharmthera.2017.10.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Metallothioneins (MTs) belong to a group of small cysteine-rich proteins that are ubiquitous throughout all kingdoms. The main function of MTs is scavenging of free radicals and detoxification and homeostating of heavy metals. In humans, 16 genes localized on chromosome 16 have been identified to encode four MT isoforms labelled by numbers (MT-1-MT-4). MT-2, MT-3 and MT-4 proteins are encoded by a single gene. MT-1 comprises many (sub)isoforms. The known active MT-1 genes are MT-1A, -1B, -1E, -1F, -1G, -1H, -1M and -1X. The rest of the MT-1 genes (MT-1C, -1D, -1I, -1J and -1L) are pseudogenes. The expression and localization of individual MT (sub)isoforms and pseudogenes vary at intra-cellular level and in individual tissues. Changes in MT expression are associated with the process of carcinogenesis of various types of human malignancies, or with a more aggressive phenotype and therapeutic resistance. Hence, MT (sub)isoform profiling status could be utilized for diagnostics and therapy of tumour diseases. This review aims on a comprehensive summary of methods for analysis of MTs at (sub)isoforms levels, their expression in single tumour diseases and strategies how this knowledge can be utilized in anticancer therapy.
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Affiliation(s)
- Sona Krizkova
- Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic; Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Marta Kepinska
- Department of Biomedical and Environmental Analysis, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211, 50-556 Wroclaw, Poland
| | - Gabriella Emri
- Department of Dermatology, Faculty of Medicine, University of Debrecen, Nagyerdei krt 98, H-4032 Debrecen, Hungary
| | - Tomas Eckschlager
- Department of Paediatric Haematology and Oncology, 2nd Faculty of Medicine, Charles University, and University Hospital Motol, V Uvalu 84, CZ-150 06 Prague 5, Czech Republic
| | - Marie Stiborova
- Department of Biochemistry, Faculty of Science, Charles University, Albertov 2030, CZ-128 40 Prague 2, Czech Republic
| | - Petra Pokorna
- Department of Biochemistry, Faculty of Science, Charles University, Albertov 2030, CZ-128 40 Prague 2, Czech Republic; Department of Oncology, 2nd Faculty of Medicine, Charles University, and University Hospital Motol, V Uvalu 84, CZ-150 06 Prague 5, Czech Republic
| | - Zbynek Heger
- Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic; Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Vojtech Adam
- Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic; Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.
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Hsieh H, Horwath MC, Genter MB. Zinc gluconate toxicity in wild-type vs. MT1/2-deficient mice. Neurotoxicology 2016; 58:130-136. [PMID: 27979773 DOI: 10.1016/j.neuro.2016.12.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 12/08/2016] [Accepted: 12/09/2016] [Indexed: 10/20/2022]
Abstract
Previous studies have suggested that oral zinc supplementation can help reduce the duration of the common cold; however, the use of intranasal (IN) zinc is strongly associated with anosmia, or the loss of the sense of smell, in humans. Prior studies from this lab showed that upregulation of metallothioneins (MT) is a rapid and robust response to zinc gluconate (ZG). Therefore, we assessed the role of MT in the recovery of nasal epithelial damage resulting from IN zinc administration. The main studies in this investigation used a high dose of ZG (170mM) to ensure ablation of the olfactory mucosa, so that the progression of histological and functional recovery could be assessed. In vivo studies using wild-type, MT1/2 knockout mice (MT KO), and heterozygotes administered ZG by IN instillation showed profound loss of the olfactory mucosa in the nasal cavity. Recovery was monitored, and a lower percentage of the MT KO mice were able to smell 28 d after treatment; however, no significant difference was observed in the rate of cell proliferation in the basal layer of the olfactory epithelium between MT KO and wild-type mice. A lower concentration of ZG (33mM), equivalent to that found in homeopathic IN ZG preparations, also caused olfactory epithelial toxicity in mice. These studies suggest that the use of zinc in drug formulations intended for IN administration in humans must be carefully evaluated for their potential to cause olfactory functional deficits.
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Affiliation(s)
- Heidi Hsieh
- Department of Environmental Health, University of Cincinnati, Cincinnati, OH 45267-0056, United States
| | - Michael C Horwath
- Department of Internal Medicine, University of Cincinnati, Cincinnati, OH 45267-0557, United States; Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, United States
| | - Mary Beth Genter
- Department of Environmental Health, University of Cincinnati, Cincinnati, OH 45267-0056, United States.
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Babaei J, Jalali A, Galehdari H, Saki A. MT1A (A>G), MT1A (C>G), MT1M (A>C) and MT4 (G>A) single nucleotide polymorphism allele frequencies in Iranian populations. BIOTECHNOL BIOTEC EQ 2016. [DOI: 10.1080/13102818.2016.1207487] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Javad Babaei
- Department of Pharmacology and Toxicology, School of Pharmacy and Toxicology Research Center, Ahvaz Jundishapur University of Medical Science, Ahvaz, Iran
| | - Amir Jalali
- Department of Pharmacology and Toxicology, School of Pharmacy and Toxicology Research Center, Ahvaz Jundishapur University of Medical Science, Ahvaz, Iran
| | - Hamid Galehdari
- Department of Genetics, School of Sciences, Shaheed Chamran University, Ahvaz, Iran
| | - Amal Saki
- Department of Statistics, School of Health, Ahvaz Jundishapur University of Medical Science, Ahvaz, Iran
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Kimura T, Kambe T. The Functions of Metallothionein and ZIP and ZnT Transporters: An Overview and Perspective. Int J Mol Sci 2016; 17:336. [PMID: 26959009 PMCID: PMC4813198 DOI: 10.3390/ijms17030336] [Citation(s) in RCA: 274] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Revised: 02/25/2016] [Accepted: 02/25/2016] [Indexed: 12/18/2022] Open
Abstract
Around 3000 proteins are thought to bind zinc in vivo, which corresponds to ~10% of the human proteome. Zinc plays a pivotal role as a structural, catalytic, and signaling component that functions in numerous physiological processes. It is more widely used as a structural element in proteins than any other transition metal ion, is a catalytic component of many enzymes, and acts as a cellular signaling mediator. Thus, it is expected that zinc metabolism and homeostasis have sophisticated regulation, and elucidating the underlying molecular basis of this is essential to understanding zinc functions in cellular physiology and pathogenesis. In recent decades, an increasing amount of evidence has uncovered critical roles of a number of proteins in zinc metabolism and homeostasis through influxing, chelating, sequestrating, coordinating, releasing, and effluxing zinc. Metallothioneins (MT) and Zrt- and Irt-like proteins (ZIP) and Zn transporters (ZnT) are the proteins primarily involved in these processes, and their malfunction has been implicated in a number of inherited diseases such as acrodermatitis enteropathica. The present review updates our current understanding of the biological functions of MTs and ZIP and ZnT transporters from several new perspectives.
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Affiliation(s)
- Tomoki Kimura
- Department of Life Science, Faculty of Science and Engineering, Setsunan University, Neyagawa, Osaka 572-8508, Japan.
| | - Taiho Kambe
- Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan.
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Lack of association between the BIM deletion polymorphism and the risk of lung cancer with and without EGFR mutations. J Thorac Oncol 2015; 10:59-66. [PMID: 25384174 DOI: 10.1097/jto.0000000000000371] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
INTRODUCTION The BIM deletion polymorphism in intron 2 was found in a significant percent of the Asian population. Patients with epidermal growth factor receptor (EGFR) mutant lung cancers harboring this BIM polymorphism have shorter progression free survival and overall response rates to EGFR tyrosine kinase inhibitors. However, the association between the BIM deletion polymorphism and lung cancer risk is unknown. METHODS The BIM deletion polymorphism was screened by polymerase chain reaction in 765 lung cancer cases and 942 healthy individuals. RESULTS Carriers possessing one allele of the BIM polymorphism were observed in 13.0% of control cases and 12.8% of lung cancer cases, similar to incidence rates reported earlier in healthy individuals. Homozygote for the BIM polymorphism was observed in four of 942 healthy controls and three of 765 lung cancer cases. The frequency of the BIM deletion polymorphism in lung cancer patients was not related to age, sex, smoking history, or family history of lung cancer. The BIM deletion polymorphism was found in 30 of 212 patients with EGFR wild type lung cancers and 16 of 120 patients with EGFR mutant lung cancers. The frequency of the BIM polymorphism is similar between cancers with wild type EGFR and mutated EGFR (p = 0.78). CONCLUSION The BIM deletion polymorphism was not associated with lung cancer susceptibility. Furthermore, the BIM polymorphism is not associated with EGFR mutant lung cancer.
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Erratum. Mol Carcinog 2015; 54:935. [DOI: 10.1002/mc.22382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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