Isolation and identification of 1,23-dihydroxy-24,25,26,27-tetranorvitamin D3, a new metabolite of 1,25-dihydroxyvitamin D3 produced in rat kidney.
Isolation and identification of 1,23-dihydroxy-24,25,26,27-tetranorvitamin D3, a new metabolite of 1,25-dihydroxyvitamin D3 produced in rat kidney.
复制标题
大鼠肾脏产生的 1,25-二羟基维生素 D3 的新代谢物 1,23-二羟基-24,25,26,27-四去甲维生素 D3 的分离和鉴定。
作者:
G. Reddy;K. Tserng;B. R. Thomas;R. Dayal;A. Norman
A new metabolite of vitamin D3 was produced in vitro by perfusing rat kidneys with 1,25-dihydroxyvitamin D3 (4 X 10(-6) M). It was isolated and purified from the lipid extract of the kidney perfusate by high-performance liquid chromatography. By means of ultraviolet absorption spectrophotometry, mass spectrometry, chemical derivatization, and chemical synthesis, the new metabolite was identified as 1,23-dihydroxy-24,25,26,27-tetranorvitamin D3. Along with the new metabolite, three other previously identified metabolites, namely, 1,24,25-trihydroxyvitamin D3, 1,25-dihydroxy-24-oxovitamin D3, and 1,23,25-trihydroxy-24-oxovitamin D3, were also isolated. The new metabolite was also formed when 1,23,25-trihydroxy-24-oxovitamin D3 was used as the substrate. Thus, the new metabolite fits into the following metabolic pathway: 1,25-dihydroxyvitamin D3----1,24(R),25-trihydroxyvitamin D3----1,25-dihydroxy-24-oxovitamin D3----1,23,25-trihydroxy-24-oxovitamin D3----1,23-dihydroxy-24,25,26,27-tetranorvitamin D3. Further, we used 1 alpha,25-dihydroxy[1 beta-3H]vitamin D3 in the kidney perfusion system and demonstrated 1,23-dihydroxy-24,25,26,27-tetranorvitamin D3 as the major further metabolite of 1,25-dihydroxyvitamin D3, circulating in the final perfusate when kidneys were perfused with 1,25-dihydroxyvitamin D3 (6 X 10(-10) M) for 4 h. The biological activity of 1,23-dihydroxy-24,25,26,27-tetranorvitamin D3 (C-3 alcohol) and its metabolic relationship to 1-hydroxy-23-carboxy-24,25,26,27-tetranorvitamin D3 (calcitroic acid or C-23 acid), the other previously identified side-chain cleavage metabolite of 1,25-dihydroxyvitamin D3, are unknown and are presently undergoing investigation.
登录
查看更多内容
DOI:
--
发表时间:
1983
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Napoli,JL;Pramanik,BC;Royal,PM;Reinhardt,TA;Horst,RL
通讯作者:
Horst,RL
影响因子:
3.9
作者:
Mayer,E;Bishop,JE;Ohnuma,N;Norman,AW
通讯作者:
Norman,AW
影响因子:
2.9
作者:
Mayer,E;Reddy,GS;Chandraratna,RA;Okamura,WH;Kruse,JR;Popjàk,G;Bishop,JE;Norman,AW
通讯作者:
Norman,AW
影响因子:
3.9
作者:
Tanaka,Y;Schnoes,HK;Smith,CM;DeLuca,HF
通讯作者:
DeLuca,HF
影响因子:
2.9
作者:
Reinhardt,TA;Napoli,JL;Praminik,B;Littledike,ET;Beitz,DC;Partridge,JJ;Uskoković,MR;Horst,RL
通讯作者:
Horst,RL