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• W2121287643 abstract "Please cite this paper as: McGahon MK, McKee J, Dash DP, Brown E, Simpson DA, Curtis TM, McGeown JG, Scholfield CN. Pharmacological profiling of store-operated Ca2+ entry in retinal arteriolar smooth muscle. Microcirculation 19: 586–597, 2012. Objective: Pharmacological profiling of SOCE and molecular profiling of ORAI and TRPC expression in arterioles. Methods: Fura-2-based microfluorimetry was used to assess CPA-induced SOCE in rat retinal arteriolar myocytes. Arteriolar ORAI and TRP transcript expression was screened using RT-PCR. Results: The SKF96365 and LOE908 blocked SOCE (IC50s of 1.2 and 1.4 μm, respectively). Gd3+ and La3+ potently inhibited SOCE (IC50s of 21 and 42 nm, respectively), but Ni2+ showed lower potency (IC50 = 11.6 μm). 2APB inhibited SOCE (IC50 = 3.7 μm) but enhanced basal influx (>100 μm). Verapamil and nifedipine had no effect at concentrations that inhibit L-type Ca2+ channels, but diltiazem inhibited SOCE by approximately 40% (≥0.1 μm). The RT-PCR demonstrated transcript expression for ORAI 1, 2, and 3, and TRPC1, 3, 4, and 7. Transcripts for TRPV1 and 2, which are activated by 2APB, were also expressed. Conclusions: The pharmacological profile of SOCE in retinal arteriolar smooth muscle appears unique when compared with other vascular tissues. This suggests that the molecular mechanisms underlying SOCE can differ, even in closely related tissues. Taken together, the pharmacological and molecular data are most consistent with involvement of TRPC1 in SOCE, although involvement of ORAI or other TRPC channels cannot be excluded." @default.
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• W2121287643 date "2012-10-01" @default.
• W2121287643 modified "2023-09-27" @default.
• W2121287643 title "Pharmacological Profiling of Store-Operated Ca2+Entry in Retinal Arteriolar Smooth Muscle" @default.
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• W2121287643 doi "https://doi.org/10.1111/j.1549-8719.2012.00192.x" @default.
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