PMID- 1910735 OWN - NLM STAT- MEDLINE DCOM- 19911104 LR - 20190912 IS - 0829-8211 (Print) IS - 0829-8211 (Linking) VI - 69 IP - 5-6 DP - 1991 May-Jun TI - Analysis of RNA for transcripts for catalase and SP71 in rat hearts after in vivo hyperthermia. PG - 375-82 AB - Hyperthermic stress induces synthesis of the major inducible (heat) stress protein (SP71) in all rat tissues. In addition, there is an increase in catalase activity in hearts at 24 and 48 h after the induction of the heat shock response. To more precisely define some of the molecular aspects of the induction of the heat shock response in hearts, we examined mRNA levels for the catalase, SP71 and HSP27. RNA was isolated from control hearts and at various time periods (0-24 h) of recovery after brief hyperthermic treatment and was analyzed by Northern blot analysis using as probes cDNA sequences for rat liver catalase, human HSP70 (inducible), and human HSP27. There was no detectable change in mRNA for catalase after heat shock or during recovery. Hyperthermic stress has no apparent effect on the regulation of transcription of mRNA coding for catalase, indicating that the increase in catalase activity is either translationally or post-translationally regulated. The human HSP70 cDNA did not hybridize to control heart RNA, but did hybridize to SP71 transcripts at 0, 1.5, and 3 h post heat shock. The mRNA level for SP71 peaked at 1.5 h, was reduced at 3 h, and became almost undetectable at 6 h post heat shock. Similarly, the human HSP27 cDNA did not hybridize to control heart RNA, but did hybridize to transcripts for HSP27 at 0, 1.5, 3, and up to 15 h post heat shock. Maximal signal for HSP27 was at 3 h post heat shock and was sharply reduced at 6 h post heat shock.(ABSTRACT TRUNCATED AT 250 WORDS) FAU - Currie, R W AU - Currie RW AD - Department of Anatomy, Dalhousie University, Halifax, N.S., Canada. FAU - Tanguay, R M AU - Tanguay RM LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Canada TA - Biochem Cell Biol JT - Biochemistry and cell biology = Biochimie et biologie cellulaire JID - 8606068 RN - 0 (Heat-Shock Proteins) RN - 0 (RNA, Messenger) RN - EC 1.11.1.6 (Catalase) SB - IM MH - Animals MH - Blotting, Northern MH - Blotting, Western MH - Catalase/analysis/biosynthesis/*genetics MH - Fever/*genetics/metabolism MH - Heat-Shock Proteins/biosynthesis/*genetics MH - Humans MH - Male MH - Myocardium/*metabolism MH - Nucleic Acid Hybridization MH - Plasmids/genetics MH - RNA, Messenger/*analysis/genetics/isolation & purification MH - Rats MH - Rats, Inbred Strains MH - Transcription, Genetic EDAT- 1991/05/01 00:00 MHDA- 1991/05/01 00:01 CRDT- 1991/05/01 00:00 PHST- 1991/05/01 00:00 [pubmed] PHST- 1991/05/01 00:01 [medline] PHST- 1991/05/01 00:00 [entrez] AID - 10.1139/o91-057 [doi] PST - ppublish SO - Biochem Cell Biol. 1991 May-Jun;69(5-6):375-82. doi: 10.1139/o91-057.