A novel adipokine CTRP1 stimulates aldosterone production.
Complement-C1q TNF-related protein 1 (CTRP1), a member of the CTRP superfamily, is expressed at high levels in adipose tissues of obese Zucker diabetic fatty (fa/fa) rats, and CTRP1 expression is induced by proinflammatory cytokines, including TNF-alpha and IL-1beta. In the present study, we investigated stimulation of aldosterone production by CTRP1, since it was observed that CTRP1 was specifically expressed in the zona glomerulosa of the adrenal cortex, where aldosterone is produced. Increased aldosterone production by CTRP1 in cells of the human adrenal cortical cell line H295R was dose-dependent. Expression levels of aldosterone synthase CYP11B2 were examined to investigate the molecular mechanisms by which CTRP1 enhances the production of aldosterone. The expression of CYP11B2 was greatly increased by treatment with CTRP1, as was the expression of the transcription factors NGFIB and NURR1, which play critical roles in stimulation of CYP11B2 gene expression. It was also revealed that angiotensin II-induced aldosterone production is, at least in part, mediated by the stimulation of CTRP1 secretion, not by the increase of CTRP1 mRNA transcription. In addition, the levels of CTRP1 were significantly up-regulated in hypertensive patients' serum. As CTRP1 was highly expressed in obese subjects as well as up-regulated in hypertensive patients, CTRP1 may be a newly identified molecular link between obesity and hypertension.
Jeon
Jun Ho
JH
Department of Life Science, Sookmyung Women's University, Seoul 140-742, Korea.
Kim
Kun-yong
KY
Kim
Jae Hyeong
JH
Baek
Ahmi
A
Cho
Hyungin
H
Lee
Young Ho
YH
Kim
Jong Wan
JW
Kim
Dohee
D
Han
Seung Hyun
SH
Lim
Jong-Seok
JS
Kim
Keun Il
KI
Yoon
Do Young
DY
Kim
Soo-Hyun
SH
Oh
Goo Taeg
GT
Kim
Eunjoon
E
Yang
Young
Y
D054392:Adipokines / Q000502:physiology*; D000450:Aldosterone / Q000096:biosynthesis*; D000804:Angiotensin II / Q000494:pharmacology; D000818:Animals; D002118:Calcium / Q000378:metabolism; D019405:Cytochrome P-450 CYP11B2 / Q000235:genetics; D004268:DNA-Binding Proteins / Q000096:biosynthesis; D006801:Humans; D006973:Hypertension / Q000097:blood; D019808:Losartan / Q000494:pharmacology; D008297:Male; D057105:Nuclear Receptor Subfamily 4, Group A, Member 1; D057126:Nuclear Receptor Subfamily 4, Group A, Member 2; D011506:Proteins / Q000502:physiology*; D012333:RNA, Messenger / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley; D018160:Receptors, Cytoplasmic and Nuclear / Q000096:biosynthesis; D011987:Receptors, Steroid / Q000096:biosynthesis; D014157:Transcription Factors / Q000096:biosynthesis; D014407:Tumor Cells, Cultured
D054392:Adipokines; C512355:C1qtnf1 protein, rat; D004268:DNA-Binding Proteins; C539821:NR4A1 protein, human; C539882:NR4A2 protein, human; C539820:Nr4a1 protein, rat; C539884:Nr4a2 protein, rat; D057105:Nuclear Receptor Subfamily 4, Group A, Member 1; D057126:Nuclear Receptor Subfamily 4, Group A, Member 2; D011506:Proteins; D012333:RNA, Messenger; D018160:Receptors, Cytoplasmic and Nuclear; D011987:Receptors, Steroid; D014157:Transcription Factors; D000804:Angiotensin II; D000450:Aldosterone; D019405:Cytochrome P-450 CYP11B2; D019808:Losartan; D002118:Calcium