Targeting CD44 and EpCAM with Antibody Dye Conjugates for the Photoimmunotherapy of Prostate Cancer
Background/Objectives: Photoimmunotherapy (PIT) is an innovative approach for the targeted therapy of cancer. In PIT, photosensitizer dyes are conjugated to tumor-specific antibodies for targeted delivery into cancer cells. Upon irradiation with visible light, the photosensitizer dye is activated an...
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MDPI AG
2025-01-01
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| Online Access: | https://www.mdpi.com/2073-4468/14/1/5 |
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| author | Isis Wolf Susanne Schultze-Seemann Christian Gratzke Philipp Wolf |
| author_facet | Isis Wolf Susanne Schultze-Seemann Christian Gratzke Philipp Wolf |
| author_sort | Isis Wolf |
| collection | DOAJ |
| description | Background/Objectives: Photoimmunotherapy (PIT) is an innovative approach for the targeted therapy of cancer. In PIT, photosensitizer dyes are conjugated to tumor-specific antibodies for targeted delivery into cancer cells. Upon irradiation with visible light, the photosensitizer dye is activated and induces cancer-specific cell death. In the present article, we describe the PIT of prostate cancer (PC) as a therapeutic option for the targeted treatment of localized prostate cancer. Methods: We conjugated the silicon phthalocyanine dye WB692-CB2 to recombinant cysteine-modified anti-CD44 and anti-EpCAM antibodies via a maleimide linker and tested the antibody dye conjugates for PIT on PC cells and prostate cancer stem cell (PCSC)-like cells. Results: The anti-CD44 and anti-EpCAM antibody dye conjugates showed specific binding and high cytotoxicity against PC and PCSC-like cells following irradiation with red light. Combined treatment with both conjugates led to enhanced cytotoxic effects. Conclusions: PIT with our dye WB692-CB2 can serve as an effective focal therapy against prostate cancer, preserving the prostate gland and minimizing side effects. It can be employed during radical prostatectomy (RP) to treat residual tumor cells or lymph node metastases in areas where further surgical intervention is not feasible. Utilizing multiple conjugates against antigens expressed on differentiated PC and PCSC-like cells, such as CD44 and EpCAM, could be an effective method to eradicate residual cancer cells in heterogeneous tumors. This approach could reduce the risk of local recurrence after RP and thus increase the therapeutic outcome of PC patients. |
| format | Article |
| id | doaj-art-0b721d9e38f54509b2dcf8cd4f394897 |
| institution | Kabale University |
| issn | 2073-4468 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Antibodies |
| spelling | doaj-art-0b721d9e38f54509b2dcf8cd4f3948972025-08-20T03:40:43ZengMDPI AGAntibodies2073-44682025-01-01141510.3390/antib14010005Targeting CD44 and EpCAM with Antibody Dye Conjugates for the Photoimmunotherapy of Prostate CancerIsis Wolf0Susanne Schultze-Seemann1Christian Gratzke2Philipp Wolf3Department of Urology, Medical Center—University of Freiburg, 79106 Freiburg im Breisgau, GermanyDepartment of Urology, Medical Center—University of Freiburg, 79106 Freiburg im Breisgau, GermanyDepartment of Urology, Medical Center—University of Freiburg, 79106 Freiburg im Breisgau, GermanyDepartment of Urology, Medical Center—University of Freiburg, 79106 Freiburg im Breisgau, GermanyBackground/Objectives: Photoimmunotherapy (PIT) is an innovative approach for the targeted therapy of cancer. In PIT, photosensitizer dyes are conjugated to tumor-specific antibodies for targeted delivery into cancer cells. Upon irradiation with visible light, the photosensitizer dye is activated and induces cancer-specific cell death. In the present article, we describe the PIT of prostate cancer (PC) as a therapeutic option for the targeted treatment of localized prostate cancer. Methods: We conjugated the silicon phthalocyanine dye WB692-CB2 to recombinant cysteine-modified anti-CD44 and anti-EpCAM antibodies via a maleimide linker and tested the antibody dye conjugates for PIT on PC cells and prostate cancer stem cell (PCSC)-like cells. Results: The anti-CD44 and anti-EpCAM antibody dye conjugates showed specific binding and high cytotoxicity against PC and PCSC-like cells following irradiation with red light. Combined treatment with both conjugates led to enhanced cytotoxic effects. Conclusions: PIT with our dye WB692-CB2 can serve as an effective focal therapy against prostate cancer, preserving the prostate gland and minimizing side effects. It can be employed during radical prostatectomy (RP) to treat residual tumor cells or lymph node metastases in areas where further surgical intervention is not feasible. Utilizing multiple conjugates against antigens expressed on differentiated PC and PCSC-like cells, such as CD44 and EpCAM, could be an effective method to eradicate residual cancer cells in heterogeneous tumors. This approach could reduce the risk of local recurrence after RP and thus increase the therapeutic outcome of PC patients.https://www.mdpi.com/2073-4468/14/1/5prostate cancerphotoimmunotherapyCD44EpCAMantibody dye conjugates |
| spellingShingle | Isis Wolf Susanne Schultze-Seemann Christian Gratzke Philipp Wolf Targeting CD44 and EpCAM with Antibody Dye Conjugates for the Photoimmunotherapy of Prostate Cancer Antibodies prostate cancer photoimmunotherapy CD44 EpCAM antibody dye conjugates |
| title | Targeting CD44 and EpCAM with Antibody Dye Conjugates for the Photoimmunotherapy of Prostate Cancer |
| title_full | Targeting CD44 and EpCAM with Antibody Dye Conjugates for the Photoimmunotherapy of Prostate Cancer |
| title_fullStr | Targeting CD44 and EpCAM with Antibody Dye Conjugates for the Photoimmunotherapy of Prostate Cancer |
| title_full_unstemmed | Targeting CD44 and EpCAM with Antibody Dye Conjugates for the Photoimmunotherapy of Prostate Cancer |
| title_short | Targeting CD44 and EpCAM with Antibody Dye Conjugates for the Photoimmunotherapy of Prostate Cancer |
| title_sort | targeting cd44 and epcam with antibody dye conjugates for the photoimmunotherapy of prostate cancer |
| topic | prostate cancer photoimmunotherapy CD44 EpCAM antibody dye conjugates |
| url | https://www.mdpi.com/2073-4468/14/1/5 |
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