| First Author | Rahmat JN | Year | 2024 |
| Journal | Int J Mol Sci | Volume | 25 |
| Issue | 16 | PubMed ID | 39201633 |
| Mgi Jnum | J:358834 | Mgi Id | MGI:7715632 |
| Doi | 10.3390/ijms25168947 | Citation | Rahmat JN, et al. (2024) Glutathione-S-Transferase Theta 2 (GSTT2) Modulates the Response to Bacillus Calmette-Guerin Immunotherapy in Bladder Cancer Patients. Int J Mol Sci 25(16) |
| abstractText | Glutathione-S-transferases (GST) enzymes detoxify xenobiotics and are implicated in response to anticancer therapy. This study evaluated the association of GST theta 1 (GSTT1), GSTT2, and GSTT2B with Mycobacterium bovis Bacillus Calmette-Guerin (BCG) response in non-muscle-invasive bladder cancer treatment. In vitro assessments of GSTT2 knockout (KO) effects were performed using cell lines and dendritic cells (DCs) from GSTT2KO mice. Deletion of GSTT2B, GSTT1, and single-nucleotide polymorphisms in the promoter region of GSTT2 was analysed in patients (n = 205) and healthy controls (n = 150). Silencing GSTT2 expression in MGH cells (GSTT2B(FL/FL)) resulted in increased BCG survival (p < 0.05) and decreased cellular reactive oxygen species. In our population, there are 24.2% with GSTT2B(Del/Del) and 24.5% with GSTT2B(FL/FL). With </= 8 instillations of BCG therapy (n = 51), 12.5% of GSTT2B(Del/Del) and 53.8% of GSTT2B(FL/FL) patients had a recurrence (p = 0.041). With >/=9 instillations (n = 153), the disease recurred in 45.5% of GSTT2B(Del/Del) and 50% of GSTT2B(FL/FL). GSTT2(FL/FL) patients had an increased likelihood of recurrence post-BCG therapy (HR 5.5 [1.87-16.69] p < 0.002). DCs from GSTT2KO mice produced three-fold more IL6 than wild-type DCs, indicating a robust inflammatory response. To summarise, GSTT2B(Del/Del) patients respond better to less BCG therapy and could be candidates for a reduced surveillance regimen. |
