LRP1B Expression as a Putative Predictor of Response to Pegylated Liposomal Doxorubicin Treatment in Ovarian Cancer

• Type: Article in International Scientific Journal
• Date: 2021

Authors

de Sousa, IDJ (Author) Other; Cunha, AI (Author) Other; Saraiva, IA (Author) Other; Portugal, RV (Author) Other; Gimba, ERP (Author) Other; Guimaraes, M (Author) Other; Prazeres, H (Author) Other; Lopes, JM (Author) FMUP; Soares, P (Author) FMUP; Lima, RT (Author) Other

Journal

Title: Pathobiology

Vol. 88

Pages: 400-411

ISSN: 1015-2008

Publisher: Karger

Indexing

ISI Web of Knowledge - 7 Citations

Other information

Authenticus ID: P-00V-MWM

DOI: 10.1159/000517372

Abstract (EN): Background: Pegylated liposomal doxorubicin (PLD) is among the most active therapies for recurrent/progressive ovarian cancer (OC). Low-density lipoprotein receptor-related protein 1B (LRP1B) is one of the 10 most significantly deleted genes in human cancers. It mediates endocytosis of several factors from the cellular environment including liposomes. Although the LRP1B role in cancer has not been fully disclosed, its contribution to resistance to liposomal therapies has been hypothesized. This study aimed to evaluate the impact of LRP1B protein as a possible marker of response to PLD in patients with OC. Methods: LRP1B expression and response to PLD were analyzed in OC cell lines by qRT-PCR and PrestoBlue viability assay, respectively. LRP1B protein expression was evaluated for the first time, in tumor samples from PLD-treated patients and controls (other chemotherapies) by immunohistochemistry. Association of LRP1B staining score (determined based on intensity and percentage of positively stained cells) with clinicopathological features, response to therapy and survival outcomes was evaluated. Results: OC cells with increased expression of LRP1B were more sensitive to PLD. LRP1B staining score was associated with clinicopathological features, response to therapy, and survival outcomes. Higher LRP1B levels were associated with prolonged progression-free survival. This association was more evident in patients treated with PLD and in responders to PLD. Conclusion: Our results support a possible role of LRP1B as a predictor of response to PLD in patients with OC. </p>

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12