Cited by 91PARP inhibition in cancer therapyBRCA gene mutations in cancerAdvanced Breast Cancer Therapies

Evaluation of the pharmacodynamics and pharmacokinetics of the PARP inhibitor olaparib: a phase I multicentre trial in patients scheduled for elective breast cancer surgery

Bundred, Nigel, Gardovskis, Janis, Jaskiewicz, Janusz, Eglitis, Janis, Paramonov, Viktor, McCormack, Peter, Swaisland, Helen, Cavallin, Maria +3 more·2013·Investigational New Drugs

Abstract

Olaparib (AZD2281) is an oral poly(ADP-ribose) polymerase (PARP) inhibitor with antitumour activity in cancer patients with BRCA1/2 germline mutations and in patients with homologous recombination deficiency. In this dose-finding study, patients were randomized to olaparib 10, 30, 100, 200 or 400 mg (capsule formulation) twice daily for the 4-5 days preceding breast cancer surgery. The primary objective was to identify an effective biological dose of olaparib for future trials. Secondary endpoints included evaluation of PARP-1 inhibition dose/exposure-response, and safety. Olaparib plasma pharmacokinetics (PK) and the pharmacodynamics (PD) in tumour and peripheral blood mononuclear cells (PBMCs) were evaluated. Population PK/PD modelling was performed on pooled data from this study and a previously reported study. Sixty patients were randomized (n = 12, each dose). Dose-dependent increases in exposure to olaparib were observed, but at ~50 % lower plasma exposure levels than seen in advanced disease studies. The mean maximal extent of PARP inhibition in PBMCs and tumour tissue was 50.6 % and 70.0 %, respectively, and was similar to inhibitory levels reported previously. No PARP inhibition-dose relationship was observed. Due to the unexpectedly low olaparib exposure, we were unable to determine an effective biological dose. Common adverse events included procedural pain (n = 31 patients), nausea, asthenia, malaise and increased blood creatinine (n = 6, each); these were of mild-to-moderate intensity, and all were manageable. Despite low olaparib exposure, PARP inhibition was consistent with previous reports. Reasons for the inter-study differences in exposure are unclear. The tolerability profile of olaparib was consistent with previous studies.

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Crossref · 10.1007/s10637-012-9922-7

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Authors
Bundred, N., Gardovskis, J., Jaskiewicz, J., Eglitis, J., Paramonov, V., McCormack, P., Swaisland, H., Cavallin, M., Parry, T., Carmichael, J., & Dixon, J. M.
Affiliations
  • Wythenshawe Hospital (GB)
  • AstraZeneca (United Kingdom) (GB)
  • Western General Hospital (GB)
Corresponding author
Bundred, Nigel
Venue
Investigational New Drugs
Published
2013-01-13
Volume
31
Issue
4
Pages
949-958
ISSN
  • 0167-6997 (ISSN-L)
  • 1573-0646
OpenAlex
W2061762018
Cited by
89
References
20
Citations by year
2026: 1 · 2025: 4 · 2024: 2 · 2023: 6 · 2022: 8 · 2021: 9 · 2020: 7 · 2019: 5 · 2018: 6 · 2017: 7 · 2016: 8 · 2015: 14 · 2014: 10 · 2013: 2
FWCI
6.24
Type
journal article
Language
en
Open access
closed
Locations
  • Investigational New Drugs (publishedVersion)
  • PubMed (publishedVersion)
Funders
AstraZeneca
Topics
  • Health Sciences › Medicine › Oncology › PARP inhibition in cancer therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › BRCA gene mutations in cancer
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Advanced Breast Cancer Therapies
Keywords
olaparib, PARP inhibitors, breast cancer surgery, pharmacokinetics, pharmacodynamics, PARP1 inhibition, dose-finding, peripheral blood mononuclear cells, BRCA mutations, homologous recombination deficiency, drug exposure, tolerability
MeSH terms
Poly(ADP-ribose) Polymerase Inhibitors, Breast Neoplasms, Demography, Enzyme Inhibitors, Female, Humans, Middle Aged, Phthalazines, Piperazines, Elective Surgical Procedures

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