PMID- 10562464 OWN - NLM STAT- MEDLINE DCOM- 20000107 LR - 20220318 IS - 1096-7192 (Print) IS - 1096-7192 (Linking) VI - 68 IP - 3 DP - 1999 Nov TI - Expression of hexokinase 1 and hexokinase 2 in mammary tissue of nonlactating and lactating rats: evaluation by RT-PCR. PG - 371-4 AB - Because the initial step in the metabolism of glucose involves phosphorylation by hexokinase (HK), we tested the hypothesis that the expression of the isozymes, hexokinase type 1 (HK1) and hexokinase type 2 (HK2), would be different in rat mammary tissue during pregnancy and lactation. RNA was extracted from mammary tissue dissected from timed pregnant rats (from gestional days 10 to 21) and nursing rat mothers (up to postnatal day 5) for mRNA examination by reverse transcriptase and polymerase chain reaction (RT-PCR) using isozyme specific oligonucleotide primers to the HK1 and HK2 cDNAs. The HK1 mRNA was expressed in both the nonlactating and lactating mammary gland tissue, but HK2 mRNA was found only during lactation. We speculate that the pattern of HK expression might affect human milk production and quality. CI - Copyright 1999 Academic Press. FAU - Kaselonis, G L AU - Kaselonis GL AD - Department of Pediatrics, UCLA School of Medicine, Los Angeles, California, 90095, USA. FAU - McCabe, E R AU - McCabe ER FAU - Gray, S M AU - Gray SM LA - eng GR - P30 HD27823/HD/NICHD NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Mol Genet Metab JT - Molecular genetics and metabolism JID - 9805456 RN - 0 (Isoenzymes) RN - 0 (RNA, Messenger) RN - EC 2.7.1.1 (Hexokinase) SB - IM MH - Animals MH - Female MH - Gestational Age MH - Hexokinase/*genetics MH - Humans MH - Isoenzymes/genetics MH - Lactation/*metabolism MH - Mammary Glands, Animal/*enzymology MH - Milk, Human/physiology MH - Pregnancy MH - Pregnancy, Animal/*metabolism MH - RNA, Messenger/genetics MH - Rats MH - Rats, Sprague-Dawley MH - Reverse Transcriptase Polymerase Chain Reaction/methods MH - Transcription, Genetic EDAT- 1999/11/24 00:00 MHDA- 1999/11/24 00:01 CRDT- 1999/11/24 00:00 PHST- 1999/11/24 00:00 [pubmed] PHST- 1999/11/24 00:01 [medline] PHST- 1999/11/24 00:00 [entrez] AID - S1096-7192(99)92923-2 [pii] AID - 10.1006/mgme.1999.2923 [doi] PST - ppublish SO - Mol Genet Metab. 1999 Nov;68(3):371-4. doi: 10.1006/mgme.1999.2923.