Effect of voltage-gated calcium channel beta anchoring and regulating protein deletion on insulin secretion in glucose intolerant C57BL/6 mice.
BARP which is endogenously expressed in insulin-secreting cells was found to modulate calcium-dependent secretion through VGCC downregulation. However, little was done to determine the effects of BARP on insulin secretion. Therefore, in addition to previous work on BARP overexpression studies, 12-14...
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sg-ntu-dr.10356-493952023-02-28T18:02:20Z Effect of voltage-gated calcium channel beta anchoring and regulating protein deletion on insulin secretion in glucose intolerant C57BL/6 mice. Tang, Fengxiang. School of Biological Sciences A*STAR Institute of Molecular and Cell Biology Lim Chiaw Hwee Hunziker Walter DRNTU::Science BARP which is endogenously expressed in insulin-secreting cells was found to modulate calcium-dependent secretion through VGCC downregulation. However, little was done to determine the effects of BARP on insulin secretion. Therefore, in addition to previous work on BARP overexpression studies, 12-14-week-old C57BL/6 mice of pancreas-specific BARP knockout (P-BARP-KO) were used here to study the effect of BARP deletion on insulin secretion. Cre recombinase mediated the removal of BARP sequence between loxP sites in P-BARP-KO mice. Effect of BARP deletion was first studied at the systemic level via IPGTT and non-fasting blood tests. P-BARP-KO mice were observed to be glucose intolerant with reduced insulin secretion. Further IPITT analysis dismissed the possibility of insulin insensitivity in P-BARP-KO mice. ELISA measurements of islet insulin content suggested a decrease in insulin production in P-BARP-KO mice. The effect of BARP deletion on islet development was further analyzed through histological observations. General islet architecture of the P-BARP-KO mice appeared normal although morphometric determinations detected reduced β-cell count and β-cell hypertrophy. Therefore, P-BARP-KO mice had reduced plasma insulin with concomitant β-cell changes. Summarizing the previous findings with the current study has shown BARP to assume a regulatory function instead of an essential role in calcium-mediated hormone release. Bachelor of Science in Biological Sciences 2012-05-18T03:28:54Z 2012-05-18T03:28:54Z 2012 2012 Final Year Project (FYP) http://hdl.handle.net/10356/49395 en Nanyang Technological University 33 p. application/pdf |
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DRNTU::Science Tang, Fengxiang. Effect of voltage-gated calcium channel beta anchoring and regulating protein deletion on insulin secretion in glucose intolerant C57BL/6 mice. |
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BARP which is endogenously expressed in insulin-secreting cells was found to modulate calcium-dependent secretion through VGCC downregulation. However, little was done to determine the effects of BARP on insulin secretion. Therefore, in addition to previous work on BARP overexpression studies, 12-14-week-old C57BL/6 mice of pancreas-specific BARP knockout (P-BARP-KO) were used here to study the effect of BARP deletion on insulin secretion. Cre recombinase mediated the removal of BARP sequence between loxP sites in P-BARP-KO mice. Effect of BARP deletion was first studied at the systemic level via IPGTT and non-fasting blood tests. P-BARP-KO mice were observed to be glucose intolerant with reduced insulin secretion. Further IPITT analysis dismissed the possibility of insulin insensitivity in P-BARP-KO mice. ELISA measurements of islet insulin content suggested a decrease in insulin production in P-BARP-KO mice. The effect of BARP deletion on islet development was further analyzed through histological observations. General islet architecture of the P-BARP-KO mice appeared normal although morphometric determinations detected reduced β-cell count and β-cell hypertrophy. Therefore, P-BARP-KO mice had reduced plasma insulin with concomitant β-cell changes. Summarizing the previous findings with the current study has shown BARP to assume a regulatory function instead of an essential role in calcium-mediated hormone release. |
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School of Biological Sciences |
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School of Biological Sciences Tang, Fengxiang. |
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Final Year Project |
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Tang, Fengxiang. |
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Tang, Fengxiang. |
title |
Effect of voltage-gated calcium channel beta anchoring and regulating protein deletion on insulin secretion in glucose intolerant C57BL/6 mice. |
title_short |
Effect of voltage-gated calcium channel beta anchoring and regulating protein deletion on insulin secretion in glucose intolerant C57BL/6 mice. |
title_full |
Effect of voltage-gated calcium channel beta anchoring and regulating protein deletion on insulin secretion in glucose intolerant C57BL/6 mice. |
title_fullStr |
Effect of voltage-gated calcium channel beta anchoring and regulating protein deletion on insulin secretion in glucose intolerant C57BL/6 mice. |
title_full_unstemmed |
Effect of voltage-gated calcium channel beta anchoring and regulating protein deletion on insulin secretion in glucose intolerant C57BL/6 mice. |
title_sort |
effect of voltage-gated calcium channel beta anchoring and regulating protein deletion on insulin secretion in glucose intolerant c57bl/6 mice. |
publishDate |
2012 |
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http://hdl.handle.net/10356/49395 |
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1759854262387474432 |