Toll-like receptor 2 mediates vascular contraction and activates RhoA signaling in vascular smooth muscle cells from STZ-induced type 1 diabetic rats

2015 ◽  
Vol 467 (11) ◽  
pp. 2361-2374 ◽  
Author(s):  
Luke Schmidt ◽  
Maria Alicia Carrillo-Sepulveda
2010 ◽  
Vol 49 (6) ◽  
pp. 1012-1021 ◽  
Author(s):  
Gyun Jee Song ◽  
Stacey Barrick ◽  
Kristen L. Leslie ◽  
Brian Sicari ◽  
Nathalie M. Fiaschi-Taesch ◽  
...  

2000 ◽  
Vol 278 (3) ◽  
pp. H714-H722 ◽  
Author(s):  
Rui Wang ◽  
Yuejin Wu ◽  
Guanghua Tang ◽  
Lingyun Wu ◽  
Salma Toma Hanna

Vascular complications of diabetes are associated with abnormal Ca2+ handling by vascular smooth muscle cells (SMCs) in which the alteration in L-type voltage-dependent Ca2+ channel (VDCC) currents may play an important role. In the present study, the characteristics of L-type VDCC currents in tail artery SMCs from streptozotocin-induced diabetic rats were examined. The densities, but not the voltage dependence, of L-type VDCC currents were reduced as diabetes progressed from 1 wk to 3 mo. The inhibitory effect of dibutyryl-cAMP on L-type VDCC currents was greater in diabetic SMCs than in age-matched control cells ( P < 0.01). Both the stimulatory effect of BAY K 8644 and the inhibitory effect of nifedipine on L-type VDCC currents were significantly enhanced in diabetic cells. The diabetes-related abnormalities in L-type VDCC currents were mimicked by culturing SMCs with a high concentration of glucose. Our results suggest that the properties of L-type VDCC in diabetic vascular SMCs were significantly altered, partially related to the increased L-type VDCC sensitivity to cAMP and hyperglycemia.


Hypertension ◽  
2000 ◽  
Vol 35 (1) ◽  
pp. 297-302 ◽  
Author(s):  
Kotaro Takeda ◽  
Toshihiro Ichiki ◽  
Yuko Funakoshi ◽  
Kiyoko Ito ◽  
Akira Takeshita

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