Abstract
A comparison of the kinetic and other parameters of enzymes of flavin-nucleotide metabolism in the whole foetus vis-à-vis the maternal liver in the pregnant rat revealed relatively lower activities of foetal flavokinase and FAD pyrophosphorylase. Passive immunoneutralization of the maternal riboflavin carrier protein suppresses foetal FAD pyrophosphorylase rather selectively. Additionally, although the activities of foetal nucleotide pyrophosphatase and FMN phosphatase were unchanged owing to immunoneutralization, higher activities of these enzymes in the whole foetus as compared with the maternal liver may be responsible for the drastic depletion of FAD levels that precipitates foetal degeneration.
Full text
PDF




Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- DELUCA C., KAPLAN N. O. Flavin adenine dinucleotide synthesis in animal tissues. Biochim Biophys Acta. 1958 Oct;30(1):6–11. doi: 10.1016/0006-3002(58)90233-6. [DOI] [PubMed] [Google Scholar]
- Fass S., Rivlin R. S. Regulation of riboflavin-metabolizing enzymes in riboflavin deficiency. Am J Physiol. 1969 Oct;217(4):988–991. doi: 10.1152/ajplegacy.1969.217.4.988. [DOI] [PubMed] [Google Scholar]
- Krishnamurthy K., Surolia N., Adiga P. R. Mechanism of foetal wastage following immunoneutralization of riboflavin carrier protein in the pregnant rat: disturbances in flavin coenzyme levels. FEBS Lett. 1984 Dec 3;178(1):87–91. doi: 10.1016/0014-5793(84)81246-6. [DOI] [PubMed] [Google Scholar]
- Krishnan N., Rao N. A. Studies on nucleotide pyrophosphatase. I. Partial purification and properties of a sheep liver enzyme that catalyzes the hydrolysis of dinucleotides. Arch Biochem Biophys. 1972 Apr;149(2):336–348. doi: 10.1016/0003-9861(72)90332-3. [DOI] [PubMed] [Google Scholar]
- LOWRY O. H., ROSEBROUGH N. J., FARR A. L., RANDALL R. J. Protein measurement with the Folin phenol reagent. J Biol Chem. 1951 Nov;193(1):265–275. [PubMed] [Google Scholar]
- Lee S. S., McCormick D. B. Effect of riboflavin status on hepatic activities of flavin-metabolizing enzymes in rats. J Nutr. 1983 Nov;113(11):2274–2279. doi: 10.1093/jn/113.11.2274. [DOI] [PubMed] [Google Scholar]
- MCCORMICK D. B. INHIBITION OF FLAVIN ADENINE DINUCLEOTIDE PYROPHOSPHORYLASE BY ISORIBOFLAVIN. Nature. 1964 Feb 29;201:925–926. doi: 10.1038/201925a0. [DOI] [PubMed] [Google Scholar]
- MILLER Z., PONCET I., TAKACS E. Biochemical studies on experimental congenital malformations: flavin nucleotides and folic acid in fetuses and livers from normal and riboflavin-deficient rats. J Biol Chem. 1962 Mar;237:968–973. [PubMed] [Google Scholar]
- Merrill A. H., Jr, McCormick D. B. Affinity chromatographic purification and properties of flavokinase (ATP:riboflavin 5'-phosphotransferase) from rat liver. J Biol Chem. 1980 Feb 25;255(4):1335–1338. [PubMed] [Google Scholar]
- Muniyappa K., Adiga P. R. Isolation and characterization of riboflavin-binding protein from pregnant-rat serum. Biochem J. 1980 May 1;187(2):537–540. doi: 10.1042/bj1870537. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Muniyappa K., Adiga P. R. Occurrence and functional importance of a riboflavin-carrier protein in the pregnant rat. FEBS Lett. 1980 Feb 11;110(2):209–212. doi: 10.1016/0014-5793(80)80074-3. [DOI] [PubMed] [Google Scholar]
- Murty C. V., Adiga P. R. Mechanism of foetal wastage following immunoneutralisation of riboflavin carrier protein in the pregnant rat. FEBS Lett. 1981 Dec 7;135(2):281–284. doi: 10.1016/0014-5793(81)80801-0. [DOI] [PubMed] [Google Scholar]
- Rivlin R. S., Langdon R. G. Regulation of hepatic FAD levels by thyroid hormone. Adv Enzyme Regul. 1966;4:45–58. doi: 10.1016/0065-2571(66)90006-9. [DOI] [PubMed] [Google Scholar]
- Rivlin R. S. Perinatal development of enzymes synthesizing FMN and FAD. Am J Physiol. 1969 Apr;216(4):979–982. doi: 10.1152/ajplegacy.1969.216.4.979. [DOI] [PubMed] [Google Scholar]
- Rivlin R. S. Regulation of flavoprotein enzymes in hypothyroidism and in riboflavin deficiency. Adv Enzyme Regul. 1970;8:239–250. doi: 10.1016/0065-2571(70)90020-8. [DOI] [PubMed] [Google Scholar]
- Rivlin R. S. Riboflavin and cancer: a review. Cancer Res. 1973 Sep;33(9):1977–1986. [PubMed] [Google Scholar]
