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Cheng L, Zhang D, Zhou L, Zhao J, Chen B. Association between SLC30A8 rs13266634 Polymorphism and Type 2 Diabetes Risk: A Meta-Analysis. Med Sci Monit 2015. [PMID: 26214053 PMCID: PMC4527121 DOI: 10.12659/msm.894052] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Accumulating but inconsistent data about the role of rs13266634 variant of SLC30A8 in type 2 diabetes have been reported, partly due to small sample sizes and non-identical ethnicity. MATERIAL AND METHODS We searched PubMed and Cochrane Library to identify eligible studies and extract data of baseline characteristics, genotype count, odds ratio (OR), and 95% confidence interval (CI). Both adjusted OR with 95% CI and genotype counts were employed to assess the association. Genotype data were further pooled to provide estimates under different genetic models and the most appropriate model was determined. Sensitivity and cumulative analysis were conducted to assure the strength of results. RESULTS Fifty-five datasets of 39 studies (including 38 of 24 with genotype count) were included. Significant associations were found in allelic contrasts using adjusted ORs and raw genotype count, respectively, overall in Asian and European populations (overall: OR=1.147/1.157, 95% CI 1.114-1.181/1.135-1.180; Asian: OR=1.186/1.165, 95% CI 1.150-1.222/1.132-1.198; European: OR=1.100/1.151, 95% CI 1.049-1.153/1.120-1.183; All p=0.00), but not in African populations (African: OR=1.255/1.111, 95% CI 0.964-1.634/0.908-1.360, p=0.091/0.305). Further analysis with genotype count under different genetic models all showed that individuals with CC genotype had 33.0% and 16.5% higher risk of type 2 diabetes than those carrying TT and CT genotypes, respectively, under the most likely codominant model. Cumulative analysis indicated gradually improved precision of estimation after studies accumulated. CONCLUSIONS Our results suggest that rs13266634 may be an important genetic factor of type 2 diabetes risk among Asian and European but not African populations.
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Affiliation(s)
- Liqing Cheng
- Department of Endocrinology and Metabolism, Southwest Hospital, Third Military Medical University, Chongqing, China (mainland)
| | - Dongmei Zhang
- Department of Dermatology, Southwest Hospital, Third Military Medical University, Chongqing, China (mainland)
| | - Lina Zhou
- Department of Endocrinology and Metabolism, Southwest Hospital, Third Military Medical University, Chongqing, China (mainland)
| | - Jie Zhao
- Department of Endocrinology and Metabolism, Southwest Hospital, Third Military Medical University, Chongqing, China (mainland)
| | - Bing Chen
- Department of Endocrinology and Metabolism, Southwest Hospital, Third Military Medical University, Chongqing, China (mainland)
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152
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Rivera-Fuentes P, Wrobel AT, Zastrow ML, Khan M, Georgiou J, Luyben TT, Roder JC, Okamoto K, Lippard SJ. A Far-Red Emitting Probe for Unambiguous Detection of Mobile Zinc in Acidic Vesicles and Deep Tissue. Chem Sci 2015; 6:1944-1948. [PMID: 25815162 PMCID: PMC4372157 DOI: 10.1039/c4sc03388d] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 01/02/2015] [Indexed: 12/12/2022] Open
Abstract
Imaging mobile zinc in acidic environments remains challenging because most small-molecule optical probes display pH-dependent fluorescence. Here we report a reaction-based sensor that detects mobile zinc unambiguously at low pH. The sensor responds reversibly and with a large dynamic range to exogenously applied Zn2+ in lysosomes of HeLa cells, endogenous Zn2+ in insulin granules of MIN6 cells, and zinc-rich mossy fiber boutons in hippocampal tissue from mice. This long-wavelength probe is compatible with the green-fluorescent protein, enabling multicolor imaging, and facilitates visualization of mossy fiber boutons at depths of >100 µm, as demonstrated by studies in live tissue employing two-photon microscopy.
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Affiliation(s)
- Pablo Rivera-Fuentes
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , MA 02139 , USA .
| | - Alexandra T. Wrobel
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , MA 02139 , USA .
| | - Melissa L. Zastrow
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , MA 02139 , USA .
| | - Mustafa Khan
- Lunenfeld-Tanenbaum Research Institute , Mount Sinai Hospital , Toronto , ON M5G 1X5 , Canada
| | - John Georgiou
- Lunenfeld-Tanenbaum Research Institute , Mount Sinai Hospital , Toronto , ON M5G 1X5 , Canada
| | - Thomas T. Luyben
- Lunenfeld-Tanenbaum Research Institute , Mount Sinai Hospital , Toronto , ON M5G 1X5 , Canada
- Department of Molecular Genetics , Faculty of Medicine , University of Toronto , Toronto , ON M5S 1A8 , Canada
| | - John C. Roder
- Lunenfeld-Tanenbaum Research Institute , Mount Sinai Hospital , Toronto , ON M5G 1X5 , Canada
- Department of Molecular Genetics , Faculty of Medicine , University of Toronto , Toronto , ON M5S 1A8 , Canada
| | - Kenichi Okamoto
- Lunenfeld-Tanenbaum Research Institute , Mount Sinai Hospital , Toronto , ON M5G 1X5 , Canada
- Department of Molecular Genetics , Faculty of Medicine , University of Toronto , Toronto , ON M5S 1A8 , Canada
| | - Stephen J. Lippard
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , MA 02139 , USA .
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153
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DeGrado TR, Pandey MK, Byrne JF, Engelbrecht HP, Jiang H, Packard AB, Thomas KA, Jacobson MS, Curran GL, Lowe VJ. Preparation and preliminary evaluation of 63Zn-zinc citrate as a novel PET imaging biomarker for zinc. J Nucl Med 2014; 55:1348-54. [PMID: 25047329 DOI: 10.2967/jnumed.114.141218] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 05/30/2014] [Indexed: 11/16/2022] Open
Abstract
UNLABELLED Abnormalities of zinc homeostasis are indicated in many human diseases. A noninvasive imaging method for monitoring zinc in the body would be useful to understand zinc dynamics in health and disease. To provide a PET imaging agent for zinc, we have investigated production of (63)Zn (half-life, 38.5 min) via the (63)Cu(p,n)(63)Zn reaction using isotopically enriched solutions of (63)Cu-copper nitrate. A solution target was used for rapid isolation of the (63)Zn radioisotope from the parent (63)Cu ions. Initial biologic evaluation was performed by biodistribution and PET imaging in normal mice. METHODS To produce (63)Zn, solutions of (63)Cu-copper nitrate in dilute nitric acid were irradiated by 14-MeV protons in a low-energy cyclotron. An automated module was used to purify (63)Zn from (63)Cu in the target solution. The (63)Cu-(63)Zn mixture was trapped on a cation-exchange resin and rinsed with water, and the (63)Zn was eluted using 0.05 N HCl in 90% acetone. The resulting solution was neutralized with NaHCO3, and the (63)Zn was then trapped on a carboxymethyl cartridge, washed with water, and eluted with isotonic 4% sodium citrate. Standard quality control tests were performed on the product according to current good manufacturing practice, including radionuclidic identity and purity, and measurement of nonradioactive Zn(+2), Cu(+2), Fe(+3), and Ni(+2) by ion-chromatography high-performance liquid chromatography. Biodistribution and PET imaging studies were performed in B6.SJL mice after intravenous administration of (63)Zn-zinc citrate. (63)Cu target material was recycled by eluting the initial resin with 4N HNO3. RESULTS Yields of 1.07 ± 0.22 GBq (uncorrected at 30-36 min after end of bombardment) of (63)Zn-zinc citrate were obtained with a 1.23 M (63)Cu-copper nitrate solution. Radionuclidic purity was greater than 99.9%, with copper content lower than 3 μg/batch. Specific activities were 41.2 ± 18.1 MBq/μg (uncorrected) for the (63)Zn product. PET and biodistribution studies in mice at 60 min showed expected high uptake in the pancreas (standard uptake value, 8.8 ± 3.2), liver (6.0 ± 1.9), upper intestine (4.7 ± 2.1), and kidney (4.2 ± 1.3). CONCLUSION A practical and current good manufacturing practice-compliant preparation of radionuclidically pure (63)Zn-zinc citrate has been developed that will enable PET imaging studies in animal and human studies. (63)Zn-zinc citrate showed the expected biodistribution in mice.
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Affiliation(s)
| | | | - John F Byrne
- Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; and
| | | | - Huailei Jiang
- Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | - Alan B Packard
- Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Kevin A Thomas
- Department of Radiology, Mayo Clinic, Rochester, Minnesota
| | | | | | - Val J Lowe
- Department of Radiology, Mayo Clinic, Rochester, Minnesota
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154
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Aziz MTA, El-Asmar MF, Rezq AM, Wassef MAA, Fouad H, Roshdy NK, Ahmed HH, Rashed LA, Sabry D, Taha FM, Hassouna A. Effects of a novel curcumin derivative on insulin synthesis and secretion in streptozotocin-treated rat pancreatic islets in vitro. Chin Med 2014; 9:3. [PMID: 24422903 PMCID: PMC3896850 DOI: 10.1186/1749-8546-9-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Accepted: 01/13/2014] [Indexed: 12/29/2022] Open
Abstract
Background Hyperglycemia induces activation of the c-Jun N-terminal kinase (JNK) pathway, which suppresses insulin gene expression and reduces DNA binding of pancreatic and duodenal homeobox factor (PDX)-1. This study aims to investigate the effects of a novel curcumin derivative (NCD) on JNK signaling pathway on insulin synthesis and secretion in streptozotocin (STZ)-treated rat pancreatic islets in vitro. Methods Isolated rat pancreatic islets were divided into five groups: untreated control group; group treated with NCD (10 μM); group exposed to STZ (5 mM); group treated with NCD (10 μM) and then exposed to STZ (5 mM); and group exposed to STZ (5 mM) and then treated with NCD (10 μM). The pancreatic islets from all groups were used for DNA fragmentation assays and quantitative assessments of the JNK, Pdx1, glucose transporter-2 (GLUT2), heme oxygenase (HO)-1, transcription factor 7-like 2 (TCF7L2), and glucagon-like peptide (GLP)-1 gene expression levels. The intracellular calcium, zinc, and the phosphorylated and total JNK protein levels were assessed. The insulin (secreted/total) and C-peptide levels were examined in islet culture medium. Results NCD protected pancreatic islets against STZ-induced DNA damage, improved total insulin (P = 0.001), secreted insulin (P = 0.001), and C-peptide levels (P = 0.001), normalized mRNA expressions of insulin, Pdx1, and GLUT2 (P = 0.0001), and significantly elevated calcium and zinc levels (P = 0.0001). All effects were significant when islets were treated with NCD before STZ (P = 0.05). JNK gene overexpression and JNK protein levels induced by STZ were significantly inhibited after NCD treatment of islets ( P = 0.0001). NCD-treated islets showed significantly elevated gene expressions of HO-1, TCF7L2, and GLP-1 (P = 0.0001), and these upregulated gene expressions were more significantly elevated with NCD treatment before STZ than after STZ (P = 0.05). Conclusions NCD improved insulin synthesis and secretion in vitro in isolated pancreatic islets treated with STZ through inhibition of the JNK pathway, up-regulation of the gene expressions of HO-1, TCF7L2, and GLP-1 and enhancing effects on calcium and zinc levels.
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Affiliation(s)
| | | | | | | | - Hanan Fouad
- Medical Biochemistry Department, Faculty of Medicine, Cairo University, POB 11562, Cairo, Egypt.
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155
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Gavrilova J, Tõugu V, Palumaa P. Affinity of zinc and copper ions for insulin monomers. Metallomics 2014; 6:1296-300. [DOI: 10.1039/c4mt00059e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zinc is an essential trace element involved in the correct packing and storage of insulin.
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Affiliation(s)
- Julia Gavrilova
- Department of Gene Technology
- Tallinn University of Technology
- 12618 Tallinn, Estonia
| | - Vello Tõugu
- Department of Gene Technology
- Tallinn University of Technology
- 12618 Tallinn, Estonia
| | - Peep Palumaa
- Department of Gene Technology
- Tallinn University of Technology
- 12618 Tallinn, Estonia
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