PMID- 2239783 OWN - NLM STAT- MEDLINE DCOM- 19901221 LR - 20180330 IS - 0002-9165 (Print) IS - 0002-9165 (Linking) VI - 52 IP - 6 DP - 1990 Dec TI - Vitamin A status in preschool-age Indonesian children as assessed by the modified relative-dose-response assay. PG - 1068-72 AB - The modified relative-dose-response (MRDR) assay has been validated in rats as a function of vitamin A status and tested in a group of American children. In this study the MRDR assay was applied to West Javan children who are at risk of being vitamin A deficient. Of 86 children enrolled, 75 were tested. In a time-course study involving 22 children aged 3.7-5.3 y, blood samples were taken at different times after doses of 0.35 mumol 3,4-didehydroretinyl acetate/kg body wt. Generally, the ratio of dehydroretinol to retinol (DR-R ratio) peaked between 4 and 8 h. Thereafter, in a survey of 53 children aged 0.6-4.8 y, single blood samples were drawn 5 h after the dehydroretinyl acetate dose. The DR-R ratio ranged from 0.0028 to 0.169. With a DR-R ratio of 0.03 as the cutoff value, 62% of the children were judged to be of marginal vitamin A status. FAU - Tanumihardjo, S A AU - Tanumihardjo SA AD - Department of Biochemistry and Biophysics, Iowa State University, Ames 50011. FAU - Muhilal AU - Muhilal FAU - Yuniar, Y AU - Yuniar Y FAU - Permaesih, D AU - Permaesih D FAU - Sulaiman, Z AU - Sulaiman Z FAU - Karyadi, D AU - Karyadi D FAU - Olson, J A AU - Olson JA LA - eng GR - DK 32793/DK/NIDDK NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Am J Clin Nutr JT - The American journal of clinical nutrition JID - 0376027 RN - 104621892X (vitamin A2) RN - 11103-57-4 (Vitamin A) RN - 4159-20-0 (3,4-didehydroretinoic acid) RN - 5688UTC01R (Tretinoin) SB - IM MH - Anthropometry MH - Child, Preschool MH - Dose-Response Relationship, Drug MH - Humans MH - Indonesia MH - Infant MH - *Nutritional Status MH - Time Factors MH - Tretinoin/*analogs & derivatives MH - Vitamin A/analogs & derivatives/*blood MH - Vitamin A Deficiency/*diagnosis EDAT- 1990/12/01 00:00 MHDA- 1990/12/01 00:01 CRDT- 1990/12/01 00:00 PHST- 1990/12/01 00:00 [pubmed] PHST- 1990/12/01 00:01 [medline] PHST- 1990/12/01 00:00 [entrez] AID - 10.1093/ajcn/52.6.1068 [doi] PST - ppublish SO - Am J Clin Nutr. 1990 Dec;52(6):1068-72. doi: 10.1093/ajcn/52.6.1068.