Lynparza (olaparib)

Finally, KPT-6566 can sensitize HeLa and HepG2 cells to PARP inhibitor Olaparib and the NHEJ inhibitor UMI-77, exhibiting a synergistic effect in suppressing cell proliferation. Our findings highlight the potential of STAG1/2 as promising therapeutic targets in cancer treatment, particularly when they are targeted in combination with other DNA damage response inhibitors.

Virtually all PSROC participants in the SOLO2/ENGOT-Ov21 experienced one or more AE whilst on placebo. Furthermore, study investigators attributed one quarter of AEs to be related to placebo therapy and dose alterations and treatment changes were made based on these AE. Further work is needed to improve measurement and categorization of AEs in trials of maintenance therapy in PSROC.

Collectively, GFPT2 is potentially useful as a biomarker for prognostic prediction and immune infiltration in a variety of malignancies ,and could lead to exciting new approaches to personalized oncotherapy.

In real-world practice, PARPis are well-tolerated with promising TTF in gBRCA1/2 and gPALB2 carriers. Further studies will delineate the clinical efficacy of PARPis in other MBC subsets, such as sBRCA mutations, HER2-positive disease, and CNS metastasis.

Moreover, tumors with heightened FBL expression exhibit reduced DNA damage levels but increased sensitivity to combined low-dose radiotherapy and olaparib treatment. This underscores the potential of leveraging PARP inhibitors to augment radiotherapy sensitivity in CRC cases characterized by elevated FBL expression, offering a promising therapeutic avenue.

Accordingly, the combination of olaparib and radiotherapy was indicated in vivo and in vitro to specifically reduce the growth of SMAD4-deficient PDAC by attenuating PARP1 activity. Collectively, our results revealed a novel molecular mechanism for the involvement of the SMAD4-PARP1 interaction in DNA repair with a vital role in radiotherapy response in PDAC. Based on our set of findings, our findings offer a new combined therapeutic strategy for SMAD4 deficient PDAC that can significantly reduce pancreatic cancer radiotherapy resistance.

This study has highlighted that Olaparib displays radiosensitizing and antimetastatic effects by inhibiting the IL-17 A-dependent signal. Remarkably, Olaparib could provide a remarkable anticancer efficacy to improve treatment response in OSCC patients with recurrent/metastatic disease after RT.

P1, N=130, Not yet recruiting, Jiangsu Simcere Pharmaceutical Co., Ltd.

The FDA (US Food and Drug Administration) has approved olaparib as a front-line maintenance therapy in combination with bevacizumab for patients with newly diagnosed advanced ovarian, fallopian tube, or primary peritoneal cancer with HRD+ status. We have demonstrated that the TSO500-HRD assay can accurately determine HRD status in ovarian tumors.

P2, N=150, Not yet recruiting, Akeso

P2, N=14, Active, not recruiting, National Cancer Institute (NCI) | N=94 --> 14 | Trial completion date: Dec 2024 --> Nov 2025 | Trial primary completion date: Dec 2024 --> Jan 2024

Using a 3D spheroid model from primary cells, we confirmed the 2D monoculture results and demonstrated not only increased caspase activity under the combined treatment but also a substantial gain in cytotoxicity compared to the mono-treatment. Our study proposes ADAM17 inhibition sensitizing ovarian cancer to olaparib treatment and improving treatment response.

P1, N=24, Not yet recruiting, Kazia Therapeutics

P2, N=60, Completed, University of Sydney | Terminated --> Completed

Eight (16%) patients had dose adjustment, but none discontinued olaparib treatment due to AEs. We provide the first evidence that mono-olaparib could be a safe and effective maintenance treatment option for patients newly diagnosed with HRD-positive/BRCA wild-type ovarian cancer.

P3, N=851, Active, not recruiting, Merck Sharp & Dohme LLC | N=591 --> 851

P1/2, N=5, Terminated, University of Utah | N=39 --> 5 | Trial completion date: Aug 2027 --> Oct 2024 | Recruiting --> Terminated; This study was terminated due to sponsor de-activation of all programs associated with RP-3500 (camonsertib).

P2, N=104, Active, not recruiting, M.D. Anderson Cancer Center | Recruiting --> Active, not recruiting

Our findings reveal that both PARPi olaparib and rucaparib sensitize A549 cells to 12C-ion exposure, with olaparib exhibiting superior sensitization. Thus we are the first to demonstrate that olaparib sensitizes NSCLC cells to carbon ion by interfering with HR and NHEJ pathway. These insights underscore the promising therapeutic potential of combining PARP inhibition with carbon ion exposure for effective NSCLC management.

P=N/A, N=342, Completed, AstraZeneca | Active, not recruiting --> Completed | Trial completion date: Dec 2024 --> Sep 2024 | Trial primary completion date: Dec 2024 --> Sep 2024

The 100-gene expression signature identified in this study may serve as a valuable predictive biomarker for PARP inhibitor sensitivity in gastric cancer.

Moreover, compared to the JQ1 and PARPi olaparib combination, PARP1-PROTAC and JQ1 had more notable synergistic effects. Further research into the synergistic mechanism demonstrated that combination therapy enhanced DNA damage and suppressed DNA repair by inducing cell cycle arrest and cell apoptosis. The present study therefore provides the experimental data for this type of combination therapy, which is expected to be an innovative approach for the treatment of HR-proficient pancreatic cancer.

The FDA recently approved olaparib and rucaparib for treating mCRPC patients with HRR gene alterations. Ongoing trials are investigating combination therapies involving PARP inhibitors combined with radiation, chemotherapy, immunotherapy, and androgen receptor signaling inhibitors (ARSIs) to improve the effectiveness of PARP inhibitors and broaden the range of patients who can benefit from the treatment. This review provides an overview of the development of PARP inhibitors in prostate cancer and analyzes the mechanisms underlying their resistance.

P2, N=50, Active, not recruiting, AstraZeneca | Trial primary completion date: May 2024 --> Nov 2024

P1, N=54, Active, not recruiting, Abramson Cancer Center at Penn Medicine | Phase classification: P1/2 --> P1 | Trial completion date: Apr 2024 --> Dec 2024 | Trial primary completion date: Apr 2024 --> Dec 2024

A literature review of all reported cases of cutaneous metastasis in prostate cancer was conducted to shed light on the incidence, clinical presentation, diagnosis, treatment, and prognosis of this entity. We also reviewed published cases of skin metastasis in BRCA-associated cancers with an effort to correlate skin involvement with PARPi treatment, BRCAness status, and prognosis.

P=N/A, N=61, Active, not recruiting, AstraZeneca | Recruiting --> Active, not recruiting | N=104 --> 61

The study indicates that targeting both HSP90AB1 and PARP1 presents a promising therapeutic strategy for prostate cancer. The synergistic combination of celastrol and olaparib enhances the efficacy of treatment against prostate cancer, offering a potent approach to combat this disease.

PARP inhibitors may be considered for patients with advanced pancreatic cancer harboring pathogenic alterations of BRCA who cannot tolerate standard chemotherapy. Maintenance PARPis can be considered in selected patients with non-BRCA/non-PALB2 HRR mutations.

Here, we detailed the role of PARP-1 as a therapeutic target in CRC and studied the efficacy of novel PARPi compounds in wildtype (WT) and DNA repair-deficient CRC cell lines together with the chemotherapeutics irinotecan (IT), 5-fluorouracil (5-FU), and oxaliplatin (OXA). Finally, we provided evidence that all PARPi (olaparib > veliparib > X17613 > X17618) synergize with chemotherapeutic drugs (IT > OXA) in a BRCA2-dependent manner in CRC cells, whereas ATR deficiency had only a minor impact. Collectively, our study identified novel lead structures with potent PARP-1 inhibitory activity in CRC cells but low cytotoxicity due to the lack of PARP-1 trapping, which synergized with IT in homologous recombination deficiency.

Approximately 15% of TNBC patients have a germline mutation in BRCA1 and/or BRCA2, and for these patients, innovative therapeutic options such as olaparib and talazoparib, which are PARP inhibitors, are available. Sacituzumab govitecan (SG) is a humanized monoclonal antibody-drug conjugate directed against the surface antigen of human trophoblastic cells (Trop-2) expressed in approximately 90% of TNBC, coupled with SN-38, the active metabolite of irinotecan, a topoisomerase I inhibitor. Here, we present the case of a woman who was initially diagnosed with localized luminal B breast cancer (ER-positive; HER2-negative) and was treated with curative therapy. However, she later experienced a recurrence with metastatic TNBC (ER-negative/HER2-negative) and received treatment with sacituzumab govitecan, which resulted in prolonged disease control.

The current treatment for GBM includes adjuvant chemotherapy with temozolomide (TMZ), radiation therapy, and surgical tumor excision. Olaparib is currently investigated as a radio- and/or chemo-sensitizer in addition to being used as a single agent because it may increase the cytotoxic effects of other treatments. This review addresses Olaparib and its significance in treating TMZ resistance in GBM.

P1, N=13, Active, not recruiting, National Cancer Institute (NCI) | Trial completion date: Sep 2024 --> Sep 2025

Inhibition of PINK1 expression significantly reduced mitochondrial function and mass, impaired cell growth, and decreased resistance to Olaparib. These findings suggest that PINK1 plays a crucial role in modulating mitochondrial dynamics that confer therapeutic resistance, highlighting its potential as a therapeutic target for overcoming Olaparib resistance in PCa.

P2, N=56, Recruiting, University of Chicago | Trial completion date: Oct 2025 --> Apr 2025 | Trial primary completion date: Oct 2024 --> Apr 2025

P2, N=145, Active, not recruiting, National Cancer Institute (NCI) | Trial completion date: Jul 2024 --> Jul 2025 | Trial primary completion date: Jul 2024 --> Jul 2025

Our retrospective study demonstrates that PARP inhibitor maintenance therapy, including olaparib and niraparib, significantly prolongs PFS in patients with PSR epithelial ovarian, tubal, or primary peritoneal cancer, These findings support the broad utilization of PARP inhibitors as a standard maintenance therapy for PSR epithelial ovarian cancer irrespective of BRCA mutation status.

Our findings show that ATRi increased reliance on PARP for metabolic viability, the combination of ATRi and PARPi induced synthetic lethality in cervical cancer in vitro, and reduced tumor burden in vivo.

P2/3, N=10, Active, not recruiting, Rush University Medical Center | Trial primary completion date: Sep 2024 --> Dec 2024

P2, N=40, Not yet recruiting, British Columbia Cancer Agency

P2, N=25, Recruiting, Fundación de investigación HM | Not yet recruiting --> Recruiting

Olaparib and talazoparib are PARP inhibitors (PARPi) are being employed for the monotherapies in case of the deleterious germline HER2-negative and BRCA-mutated breast cancer. The PARPi have been found its place in the all different types of Breast Cancers and have shown potential benefits. The purpose of this review is to provide an update on the oral poly(ADP-ribose) polymerase (PARP)inhibitors for the improvement in the treatment and management of Breast Cancer.