We have previously examined the involvement of the B cell leukemia-2 gene product (Bcl-2) family proteins (Bcl-2, Bcl-x, Bax, Bak, and Bad) in Alzheimer's disease (AD) and found that Bcl-2, Bcl-x, Bak, and Bad were upregulated. As AD is an aging-associated disease, in the present study we examined the developmental and aging-related changes in Bcl-2 family proteins in the rat brain. Immunoblot analyses of brain extracts from embryonic day 19 (E19) to postnatal 96-week-old rats indicated that the Bcl-2 protein level was highest at E19 and decreased after birth. Bcl-x levels remained high from E19 to 96 weeks. Bax levels were high hom E19 to 2 weeks and decreased from 4 weeks onward. Bak levels were highest at E19 and decreased abruptly after birth. Bad levels were high from E19 to 2 weeks and decreased abruptly at 4 weeks. The present results suggest that the expression of each Bcl-2 family protein is differentially regulated during development and aging and that the changes in the senescent brains are different from those observed in AD. (C) 1998 Academic Press.
机构:
WASHINGTON UNIV, SCH MED, HOWARD HUGHES MED INST, DEPT PATHOL, ST LOUIS, MO 63110 USAWASHINGTON UNIV, SCH MED, HOWARD HUGHES MED INST, DEPT PATHOL, ST LOUIS, MO 63110 USA
OLTVAI, ZN
;
MILLIMAN, CL
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WASHINGTON UNIV, SCH MED, HOWARD HUGHES MED INST, DEPT PATHOL, ST LOUIS, MO 63110 USAWASHINGTON UNIV, SCH MED, HOWARD HUGHES MED INST, DEPT PATHOL, ST LOUIS, MO 63110 USA
MILLIMAN, CL
;
KORSMEYER, SJ
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WASHINGTON UNIV, SCH MED, HOWARD HUGHES MED INST, DEPT PATHOL, ST LOUIS, MO 63110 USAWASHINGTON UNIV, SCH MED, HOWARD HUGHES MED INST, DEPT PATHOL, ST LOUIS, MO 63110 USA
机构:
WASHINGTON UNIV, SCH MED, HOWARD HUGHES MED INST, DEPT PATHOL, ST LOUIS, MO 63110 USAWASHINGTON UNIV, SCH MED, HOWARD HUGHES MED INST, DEPT PATHOL, ST LOUIS, MO 63110 USA
OLTVAI, ZN
;
MILLIMAN, CL
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机构:
WASHINGTON UNIV, SCH MED, HOWARD HUGHES MED INST, DEPT PATHOL, ST LOUIS, MO 63110 USAWASHINGTON UNIV, SCH MED, HOWARD HUGHES MED INST, DEPT PATHOL, ST LOUIS, MO 63110 USA
MILLIMAN, CL
;
KORSMEYER, SJ
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h-index: 0
机构:
WASHINGTON UNIV, SCH MED, HOWARD HUGHES MED INST, DEPT PATHOL, ST LOUIS, MO 63110 USAWASHINGTON UNIV, SCH MED, HOWARD HUGHES MED INST, DEPT PATHOL, ST LOUIS, MO 63110 USA