Affiliation:
1. Animal Health Research Institute
2. Cairo University
3. Alexandria University
Abstract
Abstract
Most of the felines with mammary carcinoma (MC) exhibit an aggressive metastatic phenotype. A slew of studies has implicated breast cancer stem cells (BCSCs) with the phenotypes CD44+/CD24- and/or CD133+ in the promotion of invasive and metastatic MC. Where BCSCs are resistant to conventional chemo- and radiotherapies, gold nanorods (AuNRs)-mediated plasmonic photothermal therapy (PPTT) selectively eradicates BCSCs. In this study, we investigated for the first time the anti-tumor activity of AuNRs PPTT by flow cytometry analysis (FCA) of the circulatory BCSCs in the PB of cats with spontaneous metastatic and non-metastatic forms of MC. The PPTT was applied either alone (GA = 7) or in combination with mastectomy (GB = 3). In one test, BCSCs were identified as CD133+, while in another, they were identified as a CD44+/CD24- combination. With a survival rate of 50%, the non-metastatic cats in GA revealed complete tumor ablation 6–8 weeks post-treatment and complete wound healing in GB, no in situ recurrence or distant metastasis over the observation period with a statistically significant drop in cBCSC counts (P = 0.00512). Lung metastasis persisted in metastatic cats in both groups with a statistically significant rise in cBCSC counts (P = 0.008). The prognostic significance cutoff values were >996 for (CD44+/CD24-) phenotypes and >110 for CD133+ cells. That implies that BCSCs are highly susceptible to PPTT in non-metastatic queens, unlike metastatic cats, and indicates the FCA of cBCSCs as an accurate and non-invasive method for therapy monitoring in FMC.
Publisher
Research Square Platform LLC
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