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Skip to Search Results- 20Chan, Catherine B.
- 9Ozga, Jocelyn A.
- 7Wheeler, Michael B.
- 4Koshkin, Vasilij
- 4Reinecke, Dennis M.
- 3Bell, Rhonda C.
- 5Bioenergetics
- 5Metabolism
- 3Physical Activity
- 2Adipose Tissue
- 2Advanced Glycation End Products
- 2Diabetes
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2004
Zhang, Chen-Yu, Chan, Catherine B., Koshkin, Vasilij, Wheeler, Michael B., Lowell, Bradford B., Joseph, Jamie W., Saleh, Monique C., Sivitz, William I.
Chronic exposure to elevated free fatty acids (lipotoxicity) induces uncoupling protein (UCP2) in the pancreatic β-cell, and therefore a causal link between UCP2 and β-cell defects associated with obesity may exist. Recently, we showed that lipid treatment in vivo and in vitro in UCP2(–/–)...
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Glucose-regulated glucagon secretion requires insulin receptor expression in pancreatic α-cells
Download2005
Chan, Catherine B., Wheeler, Michael B., Asghar, Zeenat, Diao, Jingyu
The insulin receptor (IR) and its signaling appear to be essential for insulin secretion from pancreatic β-cells. However, much less is known about the role of the IR in α-cells. To assess the role of the IR in glucagon and insulin secretion, we engineered adeno-viruses for high efficiency small...
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IL-6 indirectly modulates the induction of glyceroneogenic enzmes in adipose tissue during exercise
Download2012
Wan, Zhongxiao, Beaudoin, Marie-Soleil, Castellani, Laura, Wright, David C., Ritchie, Ian, Chan, Catherine B.
Background Glyceroneogenesis is an important step in the control of fatty acid re-esterification with PEPCK and PDK4 being identified as key enzymes in this process. We have previously shown that glyceroneogenic enzymes such as PDK4 are rapidly induced in white adipose tissue during exercise....
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2012
Wan, Zhongxiao, MacDonald, Tara, Wright, David C., Holloway, Graham P., Chan, Catherine B., Perry, Christopher G.
Background Adipose tissue mitochondria have been implicated as key mediators of systemic metabolism. We have shown that IL-6 activates AMPK, a mediator of mitochondrial biogenesis, in adipose tissue; however, IL-6−/− mice fed a high fat diet have been reported to develop insulin resistance. These...
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Inhibition of Kv2.1 voltage-dependent K+ channels in pancreatic ß-cells enhances glucose-dependent insulin secretion
Download2002
Chan, Catherine B., Wang, Jianli, Sakellaropoulos, George, Tsushima, Robert G., Joseph, Jamie W., Smukler, Simon R., Sewing, Sabine, Saleh, Monique C., Wang, Jing, Salapatek, Anne Marie F., Wheeler, Michael B., MacDonald, Patrick E.
Voltage-dependent (Kv) outward K+ currents repolarize β-cell action potentials during a glucose stimulus to limit Ca2+ entry and insulin secretion. Dominant-negative “knockout” of Kv2 family channels enhances glucose-stimulated insulin secretion. Here we show that a putative Kv2.1 antagonist...
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Isoferulic acid prevents methylglyoxal-induced protein glycation and DNA damage by free radical scavenging activity
Download2015
Sompong, Weerachat, Suantawee, Tanyawan, Thilavech, Thavaree, Adisakwattana, Sirichai, Meeprom, Aramsri, Chan, Catherine B.
Background Isoferulic acid (IFA), a naturally occurring cinnamic acid derivative, is a main active ingredient of the rhizoma of Cimicifuga dahurica. It has been shown various pharmacological activities. The aim of the study was to investigate the effect of IFA against MG-induced protein glycation...
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Isoferulic acid, a new anti-glycation agent, inhibits fructose- and glucose-mediated protein glycation in vitro
Download2013
Meeprom, Aramsri, Adisakwattana, Sirichai, Sompong, Weerachat, Chan, Catherine B.
The inhibitory activity of isoferulic acid (IFA) on fructose- and glucose-mediated protein glycation and oxidation of bovine serum albumin (BSA) was investigated. Our data showed that IFA (1.25–5 mM) inhibited the formation of fluorescent advanced glycation end products (AGEs) and non-fluorescent...
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Limited mitochondrial permeabilization is an early manifestation of palmitate-induced lipotoxicity in pancreatic ß-cells
Download2008
Wheeler, Michael B., Chan, Catherine B., Dai, Feihan F., Koshkin, Vasilij, Robson-Doucette, Christine A.
Involvement of the mitochondrial permeability transition (MPT) pore in early stages of lipotoxic stress in the pancreatic β-cell lines MIN6 and INS-1 was the focus of this study. Both long term (indirect) and acute (direct) effects of fatty acid (FA) application on β-cell susceptibility to...
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2003
Chan, Catherine B., Wang, Xiaolin, Koshkin, Vasilij, Wheeler, Michael B., Scherer, Philipp E.
Excessive free fatty acid (FFA) exposure represents a potentially important diabetogenic condition that can impair insulin secretion from pancreatic β-cells. Because mitochondrial oxidative phosphorylation is a main link between glucose metabolism and insulin secretion, in the present work we...
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1998-01-01
McGarry, Roisin, Ozga, Jocelyn A., Reinecke, Dennis M.
Saskatoon fruit are an emerging horticultural crop across the Canadian prairies. As fruit size varies greatly among cultivars, knowledge of fruit growth patterns and factors that affect fruit size can be used to establish breeding trials and develop orchard management strategies that could...