Browsing by Author "Araz, Murat"

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    Prognostic Effect of Kelim Score of Prostate-Specific Antigen in Hormone-Sensitive Prostate Cancer Patients Treated With Novel Androgen Receptor Inhibitors: Pioneering New Ways
    (Wiley, 2025) Ilhan, Yusuf; Araz, Murat; Gurbuz, Ali Fuat; Urvay, Semiha; Urun, Muslih; Ercek, Berrak Mermit; Beypinar, Ismail
    Background The prognostic value of the PSA ELIMination rate constant K (PRO-KELIM) score was investigated in patients with metastatic castration-sensitive prostate cancer (mCSPC) treated with novel androgen receptor inhibitors. Methods This multicenter retrospective study included 160 patients diagnosed with prostate adenocarcinoma between 2011 and 2024 who received enzalutamide or abiraterone during the mCSPC and had at least three PSA measurements within the first 100 days of treatment. The patients were categorized into favorable (PRO-KELIM >= 1.0) and unfavorable (PRO-KELIM < 1.0) groups. Progression-free survival (PFS) and overall survival (OS) were analyzed using the Kaplan-Meier survival analysis and Cox regression. Results Median PFS was significantly higher in the favorable group than in the unfavorable group (not reached vs. 40.0 months, p < 0.001). The estimated 2-year PFS rates in the favorable and unfavorable groups were 78% and 52%, respectively. In multivariate analyses, a high PRO-KELIM score (HR 2.99; 95% CI 1.35-6.66, p = 0.007) and good initial response to treatment (p = 0.001) were independent favorable prognostic factors for PFS. The median OS did not differ significantly between the groups (p = 0.27). PRO-KELIM score was not an independent prognostic factor for OS (p = 0.76). Conclusion These findings suggest that the PRO-KELIM score can be a valuable prognostic tool in the mCSPC to assess early treatment response and predict disease progression.
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    Propsea, Safety Evaluation of Palbociclib and Ribociclib in Older Patients With Breast Cancer: a Prospective Real-World Tog Study
    (Elsevier, 2023) Avci, Okan; Iriagac, Yakup; Cavdar, Eyyuep; Karaboyun, Kubilay; Araz, Murat; Sakalar, Teoman; Seber, Erdogan Selcuk
    Introduction: In this study, the toxicities and management of palbociclib and ribociclib in older patients (>= 65 years) with metastatic breast cancer patients were investigated.Materials and Methods: Among older patients receiving palbociclib and ribociclib, Geriatric 8 (G8) and Groningen Frailty Index were used to evaluate frailty status. Dose modifications, drug withdrawal and other serious adverse events (SAEs) were recorded and analyzed according to baseline patient characteristics.Results: A total of 160 patients from 28 centers in Turkey were included (palbociclib = 76, ribociclib = 84). Forty-three patients were >= 75 years of age. The most common cause of first dose modification was neutropenia for both drugs (97% palbociclib, 69% ribociclib). Liver function tests elevation (10%) and renal function impairment (6%) were also causes for ribociclib dose modification. Drug withdrawal rate was 3.9% for palbociclib and 6% for ribociclib. SAEs were seen in 11.8% of those taking palbociclib and 15.5% of those on riboclib. An ECOG performance status of >= 2 and being older than 75 years were associated with dose reductions. Severe neutropenia was more common in patients with non-bone-only metastatic disease, those receiving treatment third-line therapy or higher, coexistance of non-neutropenic hematological side effects (for ribociclib). Neutropenia was less common among patients with obesity.Discussion: Our results show that it can be reasonable to start palbociclib and ribociclib at reduced dose in patients aged >= 75 years and/or with an ECOG performance status >= 2.