Does Proton Pump Inhibitors Decrease the Efficacy of Palbociclib and Ribociclib in Patients with Metastatic Breast Cancer?

• Published in: Medicina (Kaunas, Lithuania) Vol. 59; no. 3; p. 557
• Main Authors: Odabas, Hatice, Dogan, Akif, Ozcelik, Melike, Yildirim, Sedat, Ozkerim, Ugur, Turan, Nedim, Yildirim, Mahmut Emre, Gumus, Mahmut
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 01.03.2023; MDPI
• Subjects: Analysis; Antacids; Antineoplastic Combined Chemotherapy Protocols; Bioavailability; Breast cancer; Breast Neoplasms - drug therapy; Breast Neoplasms - pathology; Cancer therapies; Care and treatment; Clinical outcomes; Cyclin-dependent kinases; Development and progression; Diagnosis; Dosage and administration; Drug interactions; Drug therapy; drug-drug interactions; Endocrine therapy; Female; Humans; Kinases; Metastasis; metastatic breast cancer; palbociclib; Patient outcomes; Pharmacokinetics; Proton pump inhibitors; Proton Pump Inhibitors - pharmacology; Proton Pump Inhibitors - therapeutic use; Retrospective Studies; ribociclib; Targeted cancer therapy; Tumors; Turkey; proton pump inhibitors; drug-drug interactions; palbociclib; ribociclib; metastatic breast cancer
• ISSN: 1648-9144; 1010-660X; 1648-9144
• DOI: 10.3390/medicina59030557

This investigation aimed to determine the impacts of concurrent proton pump inhibitors (PPIs) on progression-free survival (PFS) in patients with hormone receptor-positive and HER2-negative metastatic breast cancer managed with palbociclib or ribociclib as either the initial or subsequent line of therapy option. In this retrospective study, patients were classified as "concurrent PPIs" if PPIs were given for at least two-thirds of the palbociclib or ribociclib therapy period, and "no concurrent PPIs" if no PPIs were given during the period of palbociclib or ribociclib therapy. Each patient was also classified as endocrine-sensitive or endocrine-resistant according to the duration of previous endocrine responses. "Concurrent PPIs" and "no concurrent PPIs" groups were compared with each other in terms of PFS. This comparison was performed for both ribociclib and palbociclib groups. : The research included 220 patients in total. The PFS of 57 patients on palbociclib using concomitant PPIs was 14.4 months. Among 63 patients using palbociclib without concomitant PPIs, the PFS was 15.8 months. No statistically significant difference was found with PPI use ( = 0.82). Among 29 patients using ribociclib concurrently with PPIs, the PFS was 22.4 months. Among 71 patients using ribociclib without PPIs, the PFS was 20.2 months. No statistically significant difference was found with PPI use ( = 0.40). : The results of our investigation showed that concomitant use of the most commonly used PPIs in the study (lansoprazole, pantoprazole, and esomeprazole) with palbociclib or ribociclib did not have any detrimental effects on PFS. Where appropriate, PPIs can be used concurrently with palbociclib and ribociclib. However, the effect of PPIs on cycling-dependent kinase 4/6 inhibitors deserves further investigation.