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Novel high molecular weight albumin-conjugated angiotensin II activates β-arrestin and G-protein pathways.

Pang HW, Linares A, Couling L, Santollo J, Ancheta L, Daniels D, Speth RC (2019) Novel high molecular weight albumin-conjugated angiotensin II activates β-arrestin and G-protein pathways. Endocrine 66(2):349-359. doi: 10.1007/s12020-019-01930-z

Objective: To study the ability of a novel bovine serum albumin-angiotensin II (BSA-Ang II) conjugate to effect responses of the AT1 angiotensin II receptor subtype mediated by the G-protein-coupled and the beta-arrestin pathways.

Summary: BSA-Ang II and Ang II stimulated water appetite equivalently but BSA-Ang II stimulated saline appetite more than Ang II. Both BSA-Ang II and Ang II were considerably more potent at causing calcium mobilization than β-arrestin binding.

Usage: Angiotensin II (Ang II) was conjugated with bovine serum albumin and compared with Ang II for competition binding to AT1 receptors, to stimulate aldosterone release from adrenocortical cells, to promote beta-arrestin binding to AT1 receptors, to promote calcium mobilization, and stimulate drinking of water and saline by rats.

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