RGD Reference Report - Ovarian stanniocalcin is structurally unique in mammals and its production and release are regulated through the luteinizing hormone receptor. - Rat Genome Database

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Ovarian stanniocalcin is structurally unique in mammals and its production and release are regulated through the luteinizing hormone receptor.

Authors: Paciga, M  Watson, AJ  DiMattia, GE  Wagner, GF 
Citation: Paciga M, etal., Endocrinology 2002 Oct;143(10):3925-34.
RGD ID: 628359
Pubmed: PMID:12239104   (View Abstract at PubMed)
DOI: DOI:10.1210/en.2002-220337   (Journal Full-text)

Stanniocalcin (STC) is a recently discovered mammalian hormone that is widely distributed in many tissues. In rodents the STC gene is most highly expressed in ovary, specifically in androgen-producing thecal and interstitial cells. In addition, ovarian levels of expression rise 15-fold over pregnancy. The objective of this study was to develop a primary culture system for ovarian thecal-interstitial cells (TICs) to identify factors governing STC production and release. We used highly purified primary cultures of rat and bovine TICs, the purity of which was routinely assessed with antigenic and enzymatic markers. The functionality of cells was assured by their responsiveness to LH in the form of progesterone release. We found that forskolin significantly increased STC gene expression and secretion by both rat and bovine TICs, an effect that was only replicated by human (h) chorionic gonadotropin (CG). Coincubation of TICs with hCG and phosphodiesterase inhibitors further increased STC secretion, whereas coincubation of TICs with hCG and protein kinase A inhibitors attenuated hCG-stimulated release. Intriguingly, ovarian STC proved to be substantially larger than the 50-kDa homodimer produced in most other tissues. These results indicate that ovarian STC is physically distinct, a feature that could explain its presence in serum during pregnancy and lactation.

Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
intracellular calcium ion homeostasis  TAS 628359 RGD 

Objects Annotated

Genes (Rattus norvegicus)
Stc1  (stanniocalcin 1)


Additional Information