PMID- 9359877 OWN - NLM STAT- MEDLINE DCOM- 19980205 LR - 20220215 IS - 0021-9533 (Print) IS - 0021-9533 (Linking) VI - 110 ( Pt 23) DP - 1997 Dec TI - HSF1 transcription factor concentrates in nuclear foci during heat shock: relationship with transcription sites. PG - 2935-41 AB - In this paper, we show that upon heat shock, HSF1 concentrates in the nucleus of diploid human fibroblasts in two large foci. The relative distribution of HSF1 nuclear foci and active heat shock protein (hsp) genes was investigated by combining fluorescence in situ hybridization (FISH) for the detection of hsp nuclear transcripts and immunofluorescence for the detection of HSF1. We show that the HSF1 foci are distinct from the sites of hsp70 and hsp90 genes transcription. This is the second report of ploidy-dependent foci of transcription factors that are independent of their specific transcription sites. However, the correlation between the number of HSF1 foci and the ploidy of the cells strongly supports the existence of a specific chromosomal target for HSF1 foci. FAU - Jolly, C AU - Jolly C AD - DyOGen, INSERM U309, Institut Albert Bonniot, Domaine de la Merci, 38706, La Tronche cedex, France. caroline.jolly@ujf-grenoble.fr FAU - Morimoto, R AU - Morimoto R FAU - Robert-Nicoud, M AU - Robert-Nicoud M FAU - Vourc'h, C AU - Vourc'h C LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Cell Sci JT - Journal of cell science JID - 0052457 RN - 0 (Chromatin) RN - 0 (DNA-Binding Proteins) RN - 0 (HSF1 protein, human) RN - 0 (HSP70 Heat-Shock Proteins) RN - 0 (HSP90 Heat-Shock Proteins) RN - 0 (Heat Shock Transcription Factors) RN - 0 (Transcription Factors) SB - IM MH - Apoptosis MH - Cell Nucleus/*metabolism/ultrastructure MH - Cell Survival MH - Cells, Cultured MH - Chromatin/physiology/ultrastructure MH - DNA-Binding Proteins/analysis/*biosynthesis MH - Diploidy MH - Female MH - Fibroblasts MH - HSP70 Heat-Shock Proteins/analysis/biosynthesis MH - HSP90 Heat-Shock Proteins/analysis/biosynthesis MH - Heat Shock Transcription Factors MH - Hot Temperature MH - Humans MH - In Situ Hybridization, Fluorescence MH - Kinetics MH - Skin/*cytology MH - Transcription Factors/biosynthesis MH - *Transcription, Genetic EDAT- 1998/02/07 00:00 MHDA- 1998/02/07 00:01 CRDT- 1998/02/07 00:00 PHST- 1998/02/07 00:00 [pubmed] PHST- 1998/02/07 00:01 [medline] PHST- 1998/02/07 00:00 [entrez] AID - 10.1242/jcs.110.23.2935 [doi] PST - ppublish SO - J Cell Sci. 1997 Dec;110 ( Pt 23):2935-41. doi: 10.1242/jcs.110.23.2935.