Cancer resistance in transgenic mice expressing the SAC module of Par-4.
Prostate apoptosis response-4 (Par-4) is a tumor-suppressor protein that induces apoptosis in cancer cells, but not in normal/immortalized cells. The cancer-specific proapoptotic action of Par-4 is encoded in its centrally located SAC domain. We report here the characterization of a novel mouse model with ubiquitous expression of the SAC domain. Although SAC transgenic mice displayed normal development and life span, they were resistant to the growth of spontaneous, as well as oncogene-induced, autochthonous tumors. Resistance to tumorigenesis was linked to inhibition of nuclear factor-kappaB activity and induction of apoptosis by the SAC domain. Collectively, our findings provide genetic evidence that the SAC domain of Par-4 confers cancer resistance in transgenic mice without compromising normal viability or aging, and may have therapeutic significance.
Zhao
Yanming
Y
Department of Radiation Medicine, University of Kentucky, Room 309, Combs Research Building, 800 Rose Street, Lexington, KY 40536, USA.
Burikhanov
Ravshan
R
Qiu
Shirley
S
Lele
Subodh M
SM
Jennings
C Darrell
CD
Bondada
Subbarao
S
Spear
Brett
B
Rangnekar
Vivek M
VM
D000818:Animals; D017209:Apoptosis / Q000235:genetics; D002471:Cell Transformation, Neoplastic / Q000235:genetics / Q000378:metabolism; D005260:Female; D020022:Genetic Predisposition to Disease; D049452:Green Fluorescent Proteins / Q000096:biosynthesis / Q000235:genetics; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D009374:Neoplasms, Experimental / Q000235:genetics* / Q000517:prevention & control*; D017434:Protein Structure, Tertiary; D044462:Receptors, Proteinase-Activated / Q000096:biosynthesis* / Q000235:genetics / Q000378:metabolism; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis / Q000235:genetics
D044462:Receptors, Proteinase-Activated; D011993:Recombinant Fusion Proteins; C481942:protease-activated receptor 4, mouse; D049452:Green Fluorescent Proteins