Expression of placental leptin and leptin receptor transcripts in early pregnancy and at term.
Objective: To demonstrate the expression of messenger RNA (mRNA) transcripts for placental leptin and leptin receptor in early gestation and at term, to quantitate transcriptional changes relative to stage of gestation, to localize transcripts within specific placental cell types, and to determine i...
| Publicado en: | Obstetrics & Gynecology Vol. 92; no. 6; pp. 1020 - 1029 |
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| Autores principales: | , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Lippincott Williams & Wilkins
Dec1998
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=114911651&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 114911651 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00297844 22Z jtl: Obstetrics & Gynecology issn: 00297844 maglogo: N pubinfo: dt: Dec1998 vid: 92 iid: 6 pid: 433 pub: Lippincott Williams & Wilkins place: Baltimore, Maryland artinfo: ui: 114911651 114911651 NLM9840570 114911651 10.1097/00006250-199812000-00026 NLM9840570 114911651 ppf: 1020 ppct: 9 formats: tig: atl: Expression of placental leptin and leptin receptor transcripts in early pregnancy and at term. aug: au: Henson, Michael C. Swan, Kenneth F. O'neil, Jennifer S. Henson, M C Swan, K F O'Neil, J S affil: Departments of Obstetrics and Gynecology, Physiology, Anatomy, and the Interdisciplinary Program in Molecular and Cellular Biology, Tulane University School of Medicine, New Orleans, Louisiana. sug: subj: Carrier Proteins Receptors, Cell Surface Adipose Tissue Metabolism Proteins Placenta Metabolism Pregnancy Trimester, Third Human Pregnancy Leptin Gene Expression Pregnancy Trimester, First RNA Female Validation Studies Comparative Studies Evaluation Research Multicenter Studies Female ab: Objective: To demonstrate the expression of messenger RNA (mRNA) transcripts for placental leptin and leptin receptor in early gestation and at term, to quantitate transcriptional changes relative to stage of gestation, to localize transcripts within specific placental cell types, and to determine if transcripts also are expressed in cultured cells.Methods: Expression of leptin and leptin receptor was assessed by reverse transcriptase-polymerase chain reaction, and leptin quantitated against a leptin mRNA competitor (MIMIC), in human placental villous tissue collected at term cesarean deliveries and earlier during gestation (7-14 weeks) upon elective terminations. In situ hybridization was used to identify cell types exhibiting transcripts for genes of interest. Additionally, tissue was dispersed enzymatically, cytotrophoblast cells progressed to syncytiotrophoblastic maturity in culture, and transcripts were assessed.Results: Placental leptin and leptin receptor transcripts were identified in early (n = 6) and late (n = 5) gestation. Although no changes (P > .05) were apparent for receptor, leptin mRNA declined (P < .005) from (mean+/-standard error) 1.815+/-.491 attomoles/microg total RNA early in gestation to .013+/-.003 attomoles/microg total RNA at term. Leptin and leptin receptor transcripts were localized in trophoblast by in situ hybridization and were expressed in culture.Conclusion: Results suggest an ontogenetic decline in leptin mRNA with advancing gestation. Localization of leptin and leptin receptor transcripts in syncytiotrophoblasts, cells also responsible for the production of hormones vital to pregnancy maintenance, suggest a potential for autocrine or paracrine interactions within this tissue. Finally, transcript expression in cultured cells suggests the suitability of in vitro paradigms for future studies of leptin in pregnancy. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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