Downregulation of BCL-2 induces downregulation of carbonic anhydrase IX, vascular endothelial growth factor, and pAkt and induces radiation sensitization.

Downregulation of BCL-2 induces downregulation of carbonic anhydrase IX, vascular endothelial growth factor, and pAkt and induces radiation sensitization. Research Abstract Details 

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Downregulation of BCL-2 induces downregulation of carbonic anhydrase IX, vascular endothelial growth factor, and pAkt and induces radiation sensitization. Abstract Text:

Satoshi Anai,Kathleen Shiverick,Theresa Medrano,Kogenta Nakamura,Steve Goodison,Bob D Brown,Charles J Rosser,Satoshi Anai,Kathleen Shiverick,Theresa Medrano,Kogenta Nakamura,Steve Goodison,Bob D Brown,Charles J Rosser,

OBJECTIVES: Our group previously demonstrated that expression of the oncogene, Bcl-2, was associated with radiation resistance. The aim of the present study was to determine whether Bcl-2 expression in radiation-resistant tumors was associated with expression of carbonic anhydrase IX (CAIX), vascular endothelial growth factor (VEGF), and pAkt and whether downregulation of Bcl-2 could modulate the expression of CAIX, VEGF, and pAkt. METHODS: Two prostate cancer cell lines, PC-3-Bcl-2 and PC-3-Neo, were injected into the subcutaneous flanks of 192 athymic male nude mice; 96 received PC-3 Bcl-2 and 96 PC-3-Neo. The mice were then treated with antisense Bcl-2 oligodeoxynucleotide (ASODN), reverse control ODN, or vehicle only (mock treatment) with or without irradiation (4 Gy). The tumors were monitored for growth (ie, volume) over time, resected at various points, and processed and sectioned for protein analyses. RESULTS: Bcl-2 ASODN treatment was associated with downregulation of Bcl-2, VEGF, pAkt, and CAIX. PC-3-Bcl-2 and PC-3-Neo prostate tumor xenografts in mice treated with the combination of Bcl-2 ASODN and irradiation were significantly (ie, one third) smaller than those in mice treated with reverse control ODN alone, Bcl-2 ASODN alone, irradiation alone, or reverse control ODN plus irradiation (P = 0.0001). An increased tumor response to the combined therapy was associated with decreased expression of Bcl-2, VEGF, and pAkt proteins. CONCLUSIONS: These findings have demonstrated an intimate relationship among CAIX, VEGF, pAkt, and Bcl-2 in prostate tumors. Thus, CAIX might prove effective as a potential marker of tumor radiation resistance. Downregulation of CAIX might lead to radiation sensitization. Consequently, the combination of CAIX reduction and radiotherapy warrants further consideration as a new strategy for therapy.

Downregulation of BCL-2 induces downregulation of carbonic anhydrase IX, vascular endothelial growth factor, and pAkt and induces radiation sensitization. Publishing Authors By Initials

S Anai,K Shiverick,T Medrano,K Nakamura,S Goodison,BD Brown,CJ Rosser,S Anai,K Shiverick,T Medrano,K Nakamura,S Goodison,BD Brown,CJ Rosser,

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Downregulation of BCL-2 induces downregulation of carbonic anhydrase IX, vascular endothelial growth factor, and pAkt and induces radiation sensitization. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Urology

VOLUME: 70

Page Numbers: 832-7

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ISSN: 1527-9995

DAY: 9

MONTH: Oct

YEAR: 2007

Downregulation of BCL-2 induces downregulation of carbonic anhydrase IX, vascular endothelial growth factor, and pAkt and induces radiation sensitization. Information

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LANGUAGE: eng

NlmUniqueID: 366151

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Grant and Affiliation Information for Downregulation of BCL-2 induces downregulation of carbonic anhydrase IX, vascular endothelial growth factor, and pAkt and induces radiation sensitization.

AFFILIATION: Division of Urology, University of Florida College of Medicine, Jacksonville, USA.

Country: United States

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MEDLINETA: Urology

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