Key result
Noradrenaline produced significantly greater tension development in mesenteric arteries from diabetic rats compared to controls, which was dissociated from increases in intracellular Ca2+.
Enhanced contractile responses to noradrenaline in diabetic rat mesenteric arteries appear dissociated from increases in intracellular calcium, suggesting increased calcium sensitivity of contractile proteins.
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Enhanced diabetic arterial contraction dissociated from [Ca²⁺]ᵢ rise suggests increased myofilament sensitivity; leaves open mechanisms for in vivo confirmation.
Chow et al. (2001) studied Chronic streptozotocin-induced diabetes. Noradrenaline vs. Control rats was evaluated on Intracellular Ca2+ and tension in mesenteric arteries. Noradrenaline produced significantly greater tension development in mesenteric arteries from diabetic rats compared to controls, which was dissociated from increases in intracellular Ca2+.
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