Abstract A9: Chronology of arterial hypertension and microalbuminuria associated with inhibiting treatments of vascular endothelium growth factor receptor in patients with cancer.

Abstract

Abstract Purpose: Angiogenesis plays a major role in cancer. Drugs blocking the growth factor receptor in the vascular endothelium constitute a fundamental treatment in several cancers. Hypertension (HBP) and proteinuria associated with these treatments is frequent and presents in an oscillating and irregular way and is generally controlled by scarcely reliable means. Methods: We started a prospective study with the determination of microalbuminuria (MAL) in 24 hours orine samples and the execution of pre- and post-treatment 24 h-ambulatory blood pressure monitoring (ABPM) and selfmeasured of BP every 12 hours at home, during 60 days, in patients with cancer under treatment with either bevacizumab or sunitinib with a view to identifying the variations in MAL, ABPM and the onset of HBP at an early stage. For ABPM, a validated recording device was used; a recording was made prior to the start of the anti-angiogenic treatment and 20 days (at least) after the first dose. An OMRON M6 tensiometer validated by the European HBP Society was used, with the ambulatory BP figures being collected at home as per standards. MAL was measured in 24h orine samples in mg/L and mg/gr creatinine. The primary goal is to find differences of at least 16 mmHg in the mean BP between the two ABPM readings. Results: N=21. Eighteen patients received bevacizumab and three sunitinib. Mean age 57.0 years (26–79). Three patients was known to be hypertensive. Differences of 4.9 and 3.9 mmHg were found between the mean systolic and diastolic BPs before and after treatment (p<0.05). Conclusions: Our data revealed a statically significant increase of blood pressure in patients treated with antiangiongenics as determined by ABMP. The data point to a greater increase in nocturnal BP suggesting a non-dipper pattern. The self measured records shown an early onset HBP. Microalbuminuria trends to increase in this patients. All data will be shown at the meeting. Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the AACR-NCI-EORTC International Conference: Molecular Targets and Cancer Therapeutics; 2011 Nov 12-16; San Francisco, CA. Philadelphia (PA): AACR; Mol Cancer Ther 2011;10(11 Suppl):Abstract nr A9.