Journal
JOURNAL OF ENDOCRINOLOGY
Volume 188, Issue 2, Pages 135-153Publisher
BIOSCIENTIFICA LTD
DOI: 10.1677/joe.1.06595
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- Intramural NIH HHS Funding Source: Medline
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One of the fundamental questions in endocrinology is how circulating or locally produced homones affect target cell functions by activating specific receptors linked to numerous signal-transduction pathways. Art important subset of G protein-coupled cell-surface receptors can activate phospholipase C enzymes to hydrolyze a small but critically important class of phospholipids, the phosphomositides. Although this signaling pathway has been extensively explored over the last 20 years, this has proven to be only the tip of the iceberg, and the multiplicity and diversity of the cellular functions controlled by phosphoinositides have surpassed any imagination. Phospho-inositides have been found to be key regulators of ion channels and transporters, and controllers of vesicular trafficking, and the transport of lipids between intracellular membranes. Essentially, the), organize the recruitment and regulation of signaling protein complexes in specific membrane compartments. While many of these processes have been classically studied by cell biologists, molecular eudocrinology cannot ignore these recent advances, and now needs to integrate the cell biologist's views in the modem concept of how hormones affect cell functions artd how derailment of simple molecular events can lead to complex endocrine and metabolic disorders.
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