title: Visfatin/Nampt and SIRT1: Roles in Postterm Delivery in Pregnancies Associated With Obesity.
abstract: Visfatin is both a systemic adipocytokine and the cytosolic enzyme, nicotinamide phosphoribosyl transferase (Nampt). This is a longevity protein, which extends the lifespan of human cells by activating sirtuin 1 (SIRT1). In this study, we sought a role for these proteins in obese pregnant women, who experience more postterm deliveries. Thus, 78 women (26 lean, 24 overweight, and 28 obese) were recruited and maternal blood and placental tissue collected prior to term labor. Plasma levels were measured by enzyme-linked immunosorbent assay and quantitative immunohistochemistry used for placenta. We confirmed maternal plasma interleukin 6 increased according to prepregnancy body mass index (BMI; P < .0001) and showed a linear relationship between BMI and syncytiotrophoblast visfatin/Nampt (P = .021) but not with its levels in maternal plasma. Both systemic and placental visfatin/Nampt were significantly associated with placental SIRT1 levels (P = .028 and .017). Thus, higher visfatin/Nampt may prevent a labor-associated decrease in SIRT1 leading to postterm delivery in obesity.
authors: Department of Obstetrics, Gynecology, and Women's Health, University of Hawaii, John A. Burns School of Medicine, Honolulu, HI, USA paijong@hawaii.edu.
authors: Pai-Jong Stacy
authors: PJ
authors: Tsai
authors: University of Hawaii, John A. Burns School of Medicine, Biostatistic Core, Honolulu, HI, USA.
authors: James
authors: J
authors: Davis
authors: Department of Pathology, University of Hawaii, John A. Burns School of Medicine, Honolulu, HI, USA.
authors: Karen
authors: K
authors: Thompson
authors: Department of Obstetrics, Gynecology, and Women's Health, University of Hawaii, John A. Burns School of Medicine, Honolulu, HI, USA.
authors: Gillian
authors: G
authors: Bryant-Greenwood
mesh_terms: D000328:Adult; D015415:Biomarkers / Q000097:blood; D015992:Body Mass Index; D016022:Case-Control Studies; D016207:Cytokines / Q000097:blood*; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D005865:Gestational Age; D006801:Humans; D007150:Immunohistochemistry; D007233:Infant, Postmature; D015850:Interleukin-6 / Q000097:blood; D016014:Linear Models; D054409:Nicotinamide Phosphoribosyltransferase / Q000097:blood*; D009765:Obesity / Q000097:blood / Q000150:complications* / Q000175:diagnosis; D010920:Placenta / Q000737:chemistry*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000097:blood / Q000209:etiology*; D012307:Risk Factors; D056564:Sirtuin 1 / Q000097:blood*
chemical_list: D015415:Biomarkers; D016207:Cytokines; C508600:IL6 protein, human; D015850:Interleukin-6; D054409:Nicotinamide Phosphoribosyltransferase; C085455:nicotinamide phosphoribosyltransferase, human; C447939:SIRT1 protein, human; D056564:Sirtuin 1
keywords: Nampt; SIRT1; obesity; pregnancy; visfatin