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자료유형
학술저널
저자정보
저널정보
대한의생명과학회 대한의생명과학회지 대한의생명과학회지 제13권 제4호
발행연도
2007.12
수록면
333 - 339 (7page)

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Recently, much attention has been paid to human retinoblastoma since it provide a good model system for studying mechanisms underlying cell growth, differentiation, proliferation, and apoptosis, and for developing cancer therapy. However, until now it is unclear whether purinergic receptors are involved in the calcium mobilization in the retinoblastoma cells. In this regard, we measured possible purinergic signaling in WERI-Rb-1 cells using Ca²? imaging technique and RT-PCR method. ATP-induced [Ca²?]i transients was maintained to about 90.7±1.0% of the control (n=48) even in the absence of extracellular calcium. The ATP-induced intracellular calcium response was only attained to 10.4±1.8% (n=55) of peak amplitude of the control after preincubation of 1 μM U-73122, a PLC inhibitor, but it was not affected by 1 μM U-73343, a inactive form of U-73122. And also ATP-induced [Ca²?]i rise was almost attenuated by 20 μM 2-APB, a putative IP₃ receptor inhibitor. Two subtypes of IP₃ receptor (IP<SUB>3-1</SUB>R, IP<SUB>3-2</SUB>R) were identified by a RT-PCR method. These findings suggest that purinergic stimuli can cause calcium mobilization via PLC-IP₃ pathway after the activation of P2Y receptors in the retinoblastoma cells, which may play important roles in cell proliferation, differentiation, growth, and cell death.

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UCI(KEPA) : I410-ECN-0101-2010-510-001484648