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Dai J, Chen R, Wang J, Zhou P, Wang B, Li J, Lu Y, Pang X, Fu S. Intraperitoneal administration of doxorubicin-encapsulated Brucea javanica oil nanoemulsion against malignant ascites. Eur J Pharm Biopharm 2024; 202:114422. [PMID: 39033885 DOI: 10.1016/j.ejpb.2024.114422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 07/10/2024] [Accepted: 07/18/2024] [Indexed: 07/23/2024]
Abstract
Malignant ascites is a common complication of advanced cancers, which reduces survival rates and diminishes patients' quality of life. Intraperitoneal chemotherapy is a conventional method for treating cancer-related ascites, but the poor drug retention of conventional drugs requires frequent administration to maintain sustained anti-tumor effects. In this study, we encapsulated doxorubicin (DOX) into Brucea javanica oil (BJO) to develop a water-in-oil (W/O) nanoemulsion called BJO@DOX for the treatment of malignant ascites through in-situ intraperitoneal administration. BJO significantly induced apoptosis of S180 cells by upregulating the expression of p53 and caspase-3 (cleaved). Additionally, BJO notably downregulated the expression of Bcl-2, further promoting apoptosis of S180 cells. Cell apoptosis significantly inhibited ascites formation and tumor cell proliferation in a mouse model. The combination of DOX and BJO exhibited satisfactory synergistic effects, consequently prolonging the survival period of mice. Histological examination of major organs indicated that the nanoemulsion had excellent biosafety in vivo. The BJO@DOX nanoemulsion represents a promising platform for in-situ chemotherapy of malignant ascites.
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Affiliation(s)
- Jie Dai
- Department of Oncology, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Renjin Chen
- Department of Oncology, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Jie Wang
- Department of Pediatrics, School of Clinical Medicine, Southwest Medical University, Luzhou, Sichuan 646000, China
| | - Ping Zhou
- Department of Radiology, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Biqiong Wang
- Department of Oncology, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Jianmei Li
- Department of Oncology, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Yun Lu
- Department of Oncology, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Xianlun Pang
- Health Management Center, the Affiliated TCM Hospital of Southwest Medical University, Luzhou 646000, China.
| | - Shaozhi Fu
- Department of Oncology, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China.
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Ruhi MK, Rickard BP, Overchuk M, Sinawang PD, Stanley E, Mansi M, Sierra RG, Hayes B, Tan X, Akin D, Chen B, Demirci U, Rizvi I. PpIX-enabled fluorescence-based detection and photodynamic priming of platinum-resistant ovarian cancer cells under fluid shear stress. Photochem Photobiol 2024. [PMID: 39189505 DOI: 10.1111/php.14014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 06/27/2024] [Accepted: 06/30/2024] [Indexed: 08/28/2024]
Abstract
Over 75% percent of ovarian cancer patients are diagnosed with advanced-stage disease characterized by unresectable intraperitoneal dissemination and the presence of ascites, or excessive fluid build-up within the abdomen. Conventional treatments include cytoreductive surgery followed by multi-line platinum and taxane chemotherapy regimens. Despite an initial response to treatment, over 75% of patients with advanced-stage ovarian cancer will relapse and succumb to platinum-resistant disease. Recent evidence suggests that fluid shear stress (FSS), which results from the movement of fluid such as ascites, induces epithelial-to-mesenchymal transition and confers resistance to carboplatin in ovarian cancer cells. This study demonstrates, for the first time, that FSS-induced platinum resistance correlates with increased cellular protoporphyrin IX (PpIX), the penultimate downstream product of heme biosynthesis, the production of which can be enhanced using the clinically approved pro-drug aminolevulinic acid (ALA). These data suggest that, with further investigation, PpIX could serve as a fluorescence-based biomarker of FSS-induced platinum resistance. Additionally, this study investigates the efficacy of PpIX-enabled photodynamic therapy (PDT) and the secretion of extracellular vesicles under static and FSS conditions in Caov-3 and NIH:OVCAR-3 cells, two representative cell lines for high-grade serous ovarian carcinoma (HGSOC), the most lethal form of the disease. FSS induces resistance to ALA-PpIX-mediated PDT, along with a significant increase in the number of EVs. Finally, the ability of PpIX-mediated photodynamic priming (PDP) to enhance carboplatin efficacy under FSS conditions is quantified. These preliminary findings in monolayer cultures necessitate additional studies to determine the feasibility of PpIX as a fluorescence-based indicator, and mediator of PDP, to target chemoresistance in the context of FSS.
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Affiliation(s)
- Mustafa Kemal Ruhi
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, North Carolina, USA
- Institute of Biomedical Engineering, Boğaziçi University, Istanbul, Turkey
| | - Brittany P Rickard
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, North Carolina, USA
- Curriculum in Toxicology & Environmental Medicine, University of North Carolina School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Marta Overchuk
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, North Carolina, USA
| | - Prima Dewi Sinawang
- Department of Chemical Engineering, School of Engineering, Stanford University, Stanford, California, USA
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratories, Department of Radiology, School of Medicine, Stanford University, Palo Alto, California, USA
- Department of Radiology, School of Medicine, Canary Center at Stanford, Stanford University, Palo Alto, California, USA
| | - Elizabeth Stanley
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, North Carolina, USA
| | - Matthew Mansi
- Department of Pharmaceutical Sciences, Philadelphia College of Pharmacy, Saint Joseph's University, Philadelphia, Pennsylvania, USA
| | - Raymond G Sierra
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Brandon Hayes
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Xianming Tan
- Department of Biostatistics, University of North Carolina School of Public Health, Chapel Hill, North Carolina, USA
| | - Demir Akin
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratories, Department of Radiology, School of Medicine, Stanford University, Palo Alto, California, USA
- Department of Radiology, School of Medicine, Canary Center at Stanford, Stanford University, Palo Alto, California, USA
| | - Bin Chen
- Department of Pharmaceutical Sciences, Philadelphia College of Pharmacy, Saint Joseph's University, Philadelphia, Pennsylvania, USA
| | - Utkan Demirci
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratories, Department of Radiology, School of Medicine, Stanford University, Palo Alto, California, USA
- Department of Radiology, School of Medicine, Canary Center at Stanford, Stanford University, Palo Alto, California, USA
| | - Imran Rizvi
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, North Carolina, USA
- Curriculum in Toxicology & Environmental Medicine, University of North Carolina School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
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Luo Z, Wan Z, Ren P, Zhang B, Huang Y, West RE, Huang H, Chen Y, Nolin TD, Xie W, Wang J, Li S, Sun J. In Situ Formation of Fibronectin-Enriched Protein Corona on Epigenetic Nanocarrier for Enhanced Synthetic Lethal Therapy. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2307940. [PMID: 38482976 PMCID: PMC11109615 DOI: 10.1002/advs.202307940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 02/15/2024] [Indexed: 05/23/2024]
Abstract
PARP inhibitors (PARPi)-based synthetic lethal therapy demonstrates limited efficacy for most cancer types that are homologous recombination (HR) proficient. To potentiate the PARPi application, a nanocarrier based on 5-azacytidine (AZA)-conjugated polymer (PAZA) for the codelivery of AZA and a PARP inhibitor, BMN673 (BMN) is developed. AZA conjugation significantly decreased the nanoparticle (NP) size and increased BMN loading. Molecular dynamics simulation and experimental validations shed mechanistic insights into the self-assembly of effective NPs. The small PAZA NPs demonstrated higher efficiency of tumor targeting and penetration than larger NPs, which is mediated by a new mechanism of active targeting that involves the recruitment of fibronectin from serum proteins following systemic administration of PAZA NPs. Furthermore, it is found that PAZA carrier sensitize the HR-proficient nonsmall cell lung cancer (NSCLC) to BMN, a combination therapy that is more effective at a lower AZA/BMN dosage. To investigate the underlying mechanism, the tumor immune microenvironment and various gene expressions by RNAseq are explored. Moreover, the BMN/PAZA combination increased the immunogenicity and synergized with PD-1 antibody in improving the overall therapeutic effect in an orthotopic model of lung cancer (LLC).
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Affiliation(s)
- Zhangyi Luo
- Center for PharmacogeneticsDepartment of Pharmaceutical ScienceUniversity of Pittsburgh School of PharmacyPittsburghPA15213USA
| | - Zhuoya Wan
- Center for PharmacogeneticsDepartment of Pharmaceutical ScienceUniversity of Pittsburgh School of PharmacyPittsburghPA15213USA
| | - Pengfei Ren
- Center for PharmacogeneticsDepartment of Pharmaceutical ScienceUniversity of Pittsburgh School of PharmacyPittsburghPA15213USA
| | - Bei Zhang
- Center for PharmacogeneticsDepartment of Pharmaceutical ScienceUniversity of Pittsburgh School of PharmacyPittsburghPA15213USA
| | - Yixian Huang
- Center for PharmacogeneticsDepartment of Pharmaceutical ScienceUniversity of Pittsburgh School of PharmacyPittsburghPA15213USA
| | - Raymond E. West
- Department of Pharmacy and TherapeuticsUniversity of Pittsburgh School of PharmacyPittsburghPA15213USA
| | - Haozhe Huang
- Center for PharmacogeneticsDepartment of Pharmaceutical ScienceUniversity of Pittsburgh School of PharmacyPittsburghPA15213USA
| | - Yuang Chen
- Center for PharmacogeneticsDepartment of Pharmaceutical ScienceUniversity of Pittsburgh School of PharmacyPittsburghPA15213USA
| | - Thomas D. Nolin
- Department of Pharmacy and TherapeuticsUniversity of Pittsburgh School of PharmacyPittsburghPA15213USA
| | - Wen Xie
- Center for PharmacogeneticsDepartment of Pharmaceutical ScienceUniversity of Pittsburgh School of PharmacyPittsburghPA15213USA
| | - Junmei Wang
- Department of Pharmaceutical Sciences and Computational Chemical Genomics Screening CenterUniversity of Pittsburgh School of PharmacyPittsburghPA15213USA
| | - Song Li
- Center for PharmacogeneticsDepartment of Pharmaceutical ScienceUniversity of Pittsburgh School of PharmacyPittsburghPA15213USA
| | - Jingjing Sun
- Department of Pharmaceutical SciencesCollege of PharmacyUniversity of Nebraska Medical CenterOmahaNE68106USA
- Fred & Pamela Buffett Cancer CenterUniversity of Nebraska Medical CenterOmahaNE68106USA
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Kumar N, Kumar S, Shukla A, Kumar S, Singh RK, Ulasov I, Kumar S, Patel AK, Yadav L, Tiwari R, Rachana, Mohanta SP, Kaushalendra, Delu V, Acharya A. Mitochondrial-mediated apoptosis as a therapeutic target for FNC (2'-deoxy-2'-b-fluoro-4'-azidocytidine)-induced inhibition of Dalton's lymphoma growth and proliferation. Discov Oncol 2024; 15:16. [PMID: 38252337 PMCID: PMC10803707 DOI: 10.1007/s12672-023-00829-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 11/13/2023] [Indexed: 01/23/2024] Open
Abstract
PURPOSE T-cell lymphomas, refer to a diverse set of lymphomas that originate from T-cells, a type of white blood cell, with limited treatment options. This investigation aimed to assess the efficacy and mechanism of a novel fluorinated nucleoside analogue (FNA), 2'-deoxy-2'-β-fluoro-4'-azidocytidine (FNC), against T-cell lymphoma using Dalton's lymphoma (DL)-bearing mice as a model. METHODS Balb/c mice transplanted with the DL tumor model received FNC treatment to study therapeutic efficacy against T-cell lymphoma. Behavioral monitoring, physiological measurements, and various analyses were conducted to evaluate treatment effects for mechanistic investigations. RESULTS The results of study indicated that FNC prevented DL-altered behavior parameters, weight gain and alteration in organ structure, hematological parameters, and liver enzyme levels. Moreover, FNC treatment restored organ structures, attenuated angiogenesis, reduced DL cell viability and proliferation through apoptosis. The mechanism investigation revealed FNC diminished MMP levels, induced apoptosis through ROS induction, and activated mitochondrial-mediated pathways leading to increase in mean survival time of DL mice. These findings suggest that FNC has potential therapeutic effects in mitigating DL-induced adverse effects. CONCLUSION FNC represents an efficient and targeted treatment strategy against T-cell lymphoma. FNC's proficient ability to induce apoptosis through ROS generation and MMP reduction makes it a promising candidate for developing newer and more effective anticancer therapies. Continued research could unveil FNC's potential role in designing a better therapeutic approach against NHL.
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Affiliation(s)
- Naveen Kumar
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India
| | - Sanjeev Kumar
- Department of Zoology, Lucknow University, Lucknow, Uttar Pradesh, 226007, India
| | - Alok Shukla
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India
| | - Sanjay Kumar
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India
| | - Rishi Kant Singh
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India
| | - Ilya Ulasov
- Group of Experimental Biotherapy and Diagnostic, Department of Advanced Materials, Institute for Regenerative Medicine, Sechenov First Moscow State Medical University, Moscow, 119991, Russia
- World-Class Research Center, Digital Biodesign and Personalized Healthcare, Sechenov First Moscow State Medical University, Moscow, 119991, Russia
| | - Sandeep Kumar
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India
| | - Anand Kumar Patel
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India
| | - Lokesh Yadav
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India
| | - Ruchi Tiwari
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India
| | - Rachana
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India
| | | | - Kaushalendra
- Department of Zoology, Pachhunga University College Campus, Mizoram University, Aizawl, Mizoram, 796001, India
| | - Vikram Delu
- Haryana State Biodiversity Board, Panchkula, Haryana, 134109, India
| | - Arbind Acharya
- Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India.
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Mateos-Pujante A, Jiménez MC, Andreu I. Assessment of the PARP inhibitor talazoparib photosafety profile. Biomed Pharmacother 2023; 167:115593. [PMID: 37793275 DOI: 10.1016/j.biopha.2023.115593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 09/22/2023] [Accepted: 09/25/2023] [Indexed: 10/06/2023] Open
Abstract
Talazoparib (TLZ) is a poly(adenosine diphosphate [ADP]-ribose) polymerase inhibitor employed for the treatment of breast cancer. This drug displays an absorption band in the UVA region, and therefore investigation of the possible phototoxic side-effects associated to its administration results of enormous relevance. In this context, we describe here a photochemical and photobiological study to ascertain the photosafety profile of TLZ. Concerning transient species, the singlet and triplet excited states of TLZ were detected by fluorescence (λmax em = 440 nm) and laser flash photolysis experiments (λmax abs = 400 nm), respectively. Remarkably, TLZ irradiation with UVA light in aqueous solution resulted in formation of a stable photooxidated product, TLZ-P, whose absorption band is extended until the visible region. From in vitro experiments, phototoxicity was revealed for the parent drug by neutral red uptake (NRU) assays, with a PIF value of ca 7; besides, TLZ induced formation of reactive oxygen species (ROS) and produced significant damage to both proteins and DNA. By contrast, the singlet and triplet excited states of TLZ-P were not detected, and no photodamage was observed in the NRU experiments. Overall, the results indicate that TLZ induces phototoxicity, whereas its photoproduct exhibits photosafety.
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Affiliation(s)
- Alejandro Mateos-Pujante
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain; Unidad Mixta de Investigación Universitat Politècnica de València -Instituto de Investigación Sanitaria (IIS) La Fe, Hospital Universitari i Politècnic La Fe, Avenida de Fernando Abril Martorell 106, 46026 Valencia, Spain
| | - M Consuelo Jiménez
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain; Unidad Mixta de Investigación Universitat Politècnica de València -Instituto de Investigación Sanitaria (IIS) La Fe, Hospital Universitari i Politècnic La Fe, Avenida de Fernando Abril Martorell 106, 46026 Valencia, Spain.
| | - Inmaculada Andreu
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain; Unidad Mixta de Investigación Universitat Politècnica de València -Instituto de Investigación Sanitaria (IIS) La Fe, Hospital Universitari i Politècnic La Fe, Avenida de Fernando Abril Martorell 106, 46026 Valencia, Spain.
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Breusa S, Zilio S, Catania G, Bakrin N, Kryza D, Lollo G. Localized chemotherapy approaches and advanced drug delivery strategies: a step forward in the treatment of peritoneal carcinomatosis from ovarian cancer. Front Oncol 2023; 13:1125868. [PMID: 37287910 PMCID: PMC10242058 DOI: 10.3389/fonc.2023.1125868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 05/04/2023] [Indexed: 06/09/2023] Open
Abstract
Peritoneal carcinomatosis (PC) is a common outcome of epithelial ovarian carcinoma and is the leading cause of death for these patients. Tumor location, extent, peculiarities of the microenvironment, and the development of drug resistance are the main challenges that need to be addressed to improve therapeutic outcome. The development of new procedures such as HIPEC (Hyperthermic Intraperitoneal Chemotherapy) and PIPAC (Pressurized Intraperitoneal Aerosol Chemotherapy) have enabled locoregional delivery of chemotherapeutics, while the increasingly efficient design and development of advanced drug delivery micro and nanosystems are helping to promote tumor targeting and penetration and to reduce the side effects associated with systemic chemotherapy administration. The possibility of combining drug-loaded carriers with delivery via HIPEC and PIPAC represents a powerful tool to improve treatment efficacy, and this possibility has recently begun to be explored. This review will discuss the latest advances in the treatment of PC derived from ovarian cancer, with a focus on the potential of PIPAC and nanoparticles in terms of their application to develop new therapeutic strategies and future prospects.
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Affiliation(s)
- Silvia Breusa
- Univ Lyon, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique (CNRS), LAGEPP Unité Mixte de Recherche (UMR) 5007, Villeurbanne, France
- Apoptosis, Cancer and Development Laboratory- Equipe labellisée ‘La Ligue’, LabEx DEVweCAN, Institut PLAsCAN, Centre de Recherche en Cancérologie de Lyon, Institut national de santé et de la recherche médicale (INSERM) U1052-Centre National de la Recherche Scientifique - Unité Mixte de Recherche (CNRS UMR)5286, Université de Lyon, Centre Léon Bérard, Lyon, France
| | - Serena Zilio
- Univ Lyon, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique (CNRS), LAGEPP Unité Mixte de Recherche (UMR) 5007, Villeurbanne, France
- Sociétés d'Accélération du Transfert de Technologies (SATT) Ouest Valorisation, Rennes, France
| | - Giuseppina Catania
- Univ Lyon, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique (CNRS), LAGEPP Unité Mixte de Recherche (UMR) 5007, Villeurbanne, France
| | - Naoual Bakrin
- Department of Surgical Oncology, Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, Lyon, France
- Centre pour l'Innovation en Cancérologie de Lyon (CICLY), Claude Bernard University Lyon 1, Lyon, France
| | - David Kryza
- Univ Lyon, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique (CNRS), LAGEPP Unité Mixte de Recherche (UMR) 5007, Villeurbanne, France
- Imthernat Plateform, Hospices Civils de Lyon, Lyon, France
| | - Giovanna Lollo
- Univ Lyon, Université Claude Bernard Lyon 1, Centre National de la Recherche Scientifique (CNRS), LAGEPP Unité Mixte de Recherche (UMR) 5007, Villeurbanne, France
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Yang S, Green A, Brown N, Robinson A, Senat M, Testino B, Dinulescu DM, Sridhar S. Sustained delivery of PARP inhibitor Talazoparib for the treatment of BRCA-deficient ovarian cancer. Front Oncol 2023; 13:1175617. [PMID: 37228496 PMCID: PMC10203577 DOI: 10.3389/fonc.2023.1175617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 04/25/2023] [Indexed: 05/27/2023] Open
Abstract
Background Ovarian cancer has long been known to be the deadliest cancer associated with the female reproductive system. More than 15% of ovarian cancer patients have a defective BRCA-mediated homologous recombination repair pathway that can be therapeutically targeted with PARP inhibitors (PARPi), such as Talazoparib (TLZ). The expansion of TLZ clinical approval beyond breast cancer has been hindered due to the highly potent systemic side effects resembling chemotherapeutics. Here we report the development of a novel TLZ-loaded PLGA implant (InCeT-TLZ) that sustainedly releases TLZ directly into the peritoneal (i.p.) cavity to treat patient-mimicking BRCA-mutated metastatic ovarian cancer (mOC). Methods InCeT-TLZ was fabricated by dissolving TLZ and PLGA in chloroform, followed by extrusion and evaporation. Drug loading and release were confirmed by HPLC. The in vivo therapeutic efficacy of InCeT-TLZ was carried out in a murine Brca2-/-p53R172H/-Pten-/- genetically engineered peritoneally mOC model. Mice with tumors were divided into four groups: PBS i.p. injection, empty implant i.p. implantation, TLZ i.p. injection, and InCeT-TLZ i.p. implantation. Body weight was recorded three times weekly as an indicator of treatment tolerance and efficacy. Mice were sacrificed when the body weight increased by 50% of the initial weight. Results Biodegradable InCeT-TLZ administered intraperitoneally releases 66 μg of TLZ over 25 days. In vivo experimentation shows doubled survival in the InCeT-TLZ treated group compared to control, and no significant signs of toxicity were visible histologically in the surrounding peritoneal organs, indicating that the sustained and local delivery of TLZ greatly maximized therapeutic efficacy and minimized severe clinical side effects. The treated animals eventually developed resistance to PARPi therapy and were sacrificed. To explore treatments to overcome resistance, in vitro studies with TLZ sensitive and resistant ascites-derived murine cell lines were carried out and demonstrated that ATR inhibitor and PI3K inhibitor could be used in combination with the InCeT-TLZ to overcome acquired PARPi resistance. Conclusion Compared to intraperitoneal PARPi injection, the InCeT-TLZ better inhibits tumor growth, delays the ascites formation, and prolongs the overall survival of treated mice, which could be a promising therapy option that benefits thousands of women diagnosed with ovarian cancer.
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Affiliation(s)
- Shicheng Yang
- Department of Chemical Engineering, Northeastern University, Boston, MA, United States
| | - Allen Green
- Department of Pathology, Division of Women’s and Perinatal Pathology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States
| | - Needa Brown
- Department of Radiation Oncology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States
- Cancer Nanomedicine Co-ops for Undergraduate Research Experience (CaNCURE), Northeastern University, Boston, MA, United States
- Department of Physics, Northeastern University, Boston, MA, United States
| | - Alexis Robinson
- Cancer Nanomedicine Co-ops for Undergraduate Research Experience (CaNCURE), Northeastern University, Boston, MA, United States
| | - Merline Senat
- Cancer Nanomedicine Co-ops for Undergraduate Research Experience (CaNCURE), Northeastern University, Boston, MA, United States
| | - Bryanna Testino
- Department of Pathology, Division of Women’s and Perinatal Pathology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States
- Cancer Nanomedicine Co-ops for Undergraduate Research Experience (CaNCURE), Northeastern University, Boston, MA, United States
| | - Daniela M. Dinulescu
- Department of Pathology, Division of Women’s and Perinatal Pathology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States
| | - Srinivas Sridhar
- Department of Chemical Engineering, Northeastern University, Boston, MA, United States
- Department of Radiation Oncology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States
- Cancer Nanomedicine Co-ops for Undergraduate Research Experience (CaNCURE), Northeastern University, Boston, MA, United States
- Department of Physics, Northeastern University, Boston, MA, United States
- Department of Bioengineering, Northeastern University, Boston, MA, United States
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8
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Xiao S, Wang Y, Ma W, Zhou P, Wang B, Wu Z, Wen Q, Xiong K, Liu Y, Fu S. Intraperitoneal administration of thermosensitive hydrogel Co-loaded with norcantharidin nanoparticles and oxaliplatin inhibits malignant ascites of hepatocellular carcinoma. Drug Deliv 2022; 29:2713-2722. [PMID: 35975331 PMCID: PMC9387330 DOI: 10.1080/10717544.2022.2111480] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Malignant ascites is a common complication of some advanced cancers. Although intraperitoneal (IP) administration of chemotherapy drugs is routinely used to treat cancerous ascites, conventional drugs have poor retention and therefore need to be administered frequently to maintain a sustained anti-tumor effect. In this study, a thermosensitive hydrogel composite loaded with norethindrone nanoparticles (NPs) and oxaliplatin (N/O/Hydrogel) was developed to inhibit ascites of hepatocellular carcinoma (HCC) through IP injection. N/O/Hydrogel induced apoptosis in the H22 cells in vitro, and significantly inhibited ascites formation, tumor cell proliferation and micro-angiogenesis in a mouse model of advanced HCC with ascites, and prolonged the survival of tumor-bearing mice. Histological examination of the major organs indicated that the hydrogel system is safe. Taken together, the N/O/Hydrogel system is a promising platform for in-situ chemotherapy of malignant ascites.
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Affiliation(s)
- Susu Xiao
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, PR China
| | - Yu Wang
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, PR China.,Health Management Center, The Affiliated Hospital of Southwest Medical University, Luzhou, PR China
| | - Wenqiong Ma
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, PR China
| | - Ping Zhou
- Department of Radiology, The Affiliated Hospital of Southwest Medical University, Luzhou, PR China
| | - Biqiong Wang
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, PR China
| | - Zhouxue Wu
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, PR China
| | - Qian Wen
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, PR China
| | - Kang Xiong
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, PR China
| | - Yanlin Liu
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, PR China
| | - Shaozhi Fu
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, PR China
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Hobbs EA, Litton JK, Yap TA. Development of the PARP inhibitor talazoparib for the treatment of advanced BRCA1 and BRCA2 mutated breast cancer. Expert Opin Pharmacother 2021; 22:1825-1837. [PMID: 34309473 DOI: 10.1080/14656566.2021.1952181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
INTRODUCTION BRCA1 and BRCA2 (BRCA1/2) mutation breast cancers constitute an uncommon, but unique group of breast cancers that present at a younger age, and are underscored by genomic instability and accumulation of DNA damage. Talazoparib is a potent poly(ADP-ribose) polymerase (PARP) inhibitor that exploits impaired DNA damage response mechanisms in this population of patients and results in significant efficacy. Based on the results of the EMBRACA trial, talazoparib was approved for the treatment of patients with advanced germline BRCA1/2 mutant breast cancer. AREAS COVERED In this review, the authors highlight the relevant clinical trials of talazoparib, as well as, safety, tolerability, and quality of life considerations. They also examine putative response and resistance mechanisms, and rational combinatorial therapeutic strategies under development. EXPERT OPINION Talazoparib has been a major advance in the treatment of germline BRCA1/2 mutation breast cancer with both clinical efficacy and improvement in quality of life compared to standard cytotoxic chemotherapy. To date, the optimal sequencing of talazoparib administration in the metastatic setting has not yet been established. A deeper understanding of response and resistance mechanisms, and more broadly, the DNA repair pathway, will lead to additional opportunities in targeting this pathway and open up therapeutic indications to a broader patient population.
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Affiliation(s)
- Evthokia A Hobbs
- Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jennifer K Litton
- Breast Medical Oncology Department, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Timothy A Yap
- Department of Investigational Cancer Therapeutics (Phase I Program), University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Khalifa Institute for Personalized Cancer Therapy, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Thoracic/Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,The Institute for Applied Cancer Science, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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10
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Yang S, Wallach M, Krishna A, Kurmasheva R, Sridhar S. Recent Developments in Nanomedicine for Pediatric Cancer. J Clin Med 2021; 10:1437. [PMID: 33916177 PMCID: PMC8036287 DOI: 10.3390/jcm10071437] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 03/20/2021] [Accepted: 03/23/2021] [Indexed: 02/07/2023] Open
Abstract
Cancer is the second biggest cause of death in children in the US. With the development of chemotherapy, there has been a substantial increase in the overall survival rate in the last 30 years. However, the overall mortality rate in children with cancer remains 25%, and many survivors experience a decline in overall quality of life and long-term adverse effects caused by treatments. Although cancer cells share common characteristics, pediatric cancers are different from adult cancers in their prevalence, mutation load, and drug response. Therefore, there is an urgent unmet need to develop therapeutic approaches specifically designed for children with cancer. Nanotechnology can potentially overcome the deficiencies of conventional methods of administering chemotherapy and ultimately improve clinical outcomes. The nanoparticle-based drug delivery systems can decrease the toxicity of therapy, provide a sustained or controlled drug release, improve the pharmacokinetic properties of loading contents, and achieve a targeted drug delivery with achievable modifications. Furthermore, therapeutic approaches based on combining nanoformulated drugs with novel immunotherapeutic agents are emerging. In this review, we discussed the recently developed nanotechnology-based strategies for treating blood and solid pediatric cancers.
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Affiliation(s)
- Shicheng Yang
- Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA;
| | - Mia Wallach
- School of Business, Northeastern University, Boston, MA 02115, USA;
| | - Apurva Krishna
- Department of Physics, Northeastern University, Boston, MA 02115, USA;
| | - Raushan Kurmasheva
- Department of Molecular Medicine, The University of Texas Health at San Antonio, San Antonio, TX 78229, USA
- Greehey Children’s Cancer Research Institute, San Antonio, TX 78229, USA
| | - Srinivas Sridhar
- Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA;
- Department of Physics, Northeastern University, Boston, MA 02115, USA;
- Division of Radiation Oncology, Harvard Medical School, Boston, MA 02115, USA
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11
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Rodell CB, Baldwin P, Fernandez B, Weissleder R, Sridhar S, Dubach JM. Quantification of Cellular Drug Biodistribution Addresses Challenges in Evaluating in vitro and in vivo Encapsulated Drug Delivery. ADVANCED THERAPEUTICS 2020; 4. [PMID: 33997266 DOI: 10.1002/adtp.202000125] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Nanoencapsulated drug delivery to solid tumors is a promising approach to overcome pharmacokinetic limitations of therapeutic drugs. However, encapsulation leads to complex drug biodistribution and delivery making analysis of delivery efficacy challenging. As proxies, nanocarrier accumulation or total tumor drug uptake in the tumor are used to evaluate delivery. Yet, these measurements fail to assess delivery of active, released drug to the target, and thus it commonly remains unknown if drug-target occupancy has been achieved. Here, we develop an approach to evaluate the delivery of encapsulated drug to the target, where residual drug target vacancy is measured using a fluorescent drug analog. In vitro measurements reveal that burst release governs drug delivery independent of nanoparticle uptake, and highlight limitations of evaluating nanoencapsulated drug delivery in these models. In vivo, however, our approach captures successful nanoencapsulated delivery, finding that tumor stromal cells drive nanoparticle accumulation and mediate drug delivery to adjacent cancer cells. These results, and generalizable approach, provide a critical advance to evaluate delivery of encapsulated drug to the drug target - the central objective of nanotherapeutics.
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Affiliation(s)
- Christopher B Rodell
- Center for Systems Biology, Massachusetts General Hospital, Boston, MA.,School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA
| | - Paige Baldwin
- Department of Bioengineering, Northeastern University, Boston, MA
| | - Bianca Fernandez
- Center for Systems Biology, Massachusetts General Hospital, Boston, MA.,Institute for Innovation in Imaging, Massachusetts General Hospital, Boston, MA
| | - Ralph Weissleder
- Center for Systems Biology, Massachusetts General Hospital, Boston, MA.,Department of Systems Biology, Harvard Medical School, Boston, MA
| | - Srinivas Sridhar
- Department of Bioengineering, Northeastern University, Boston, MA.,Department of Physics, Northeastern University, Boston, MA
| | - J Matthew Dubach
- Center for Systems Biology, Massachusetts General Hospital, Boston, MA.,Institute for Innovation in Imaging, Massachusetts General Hospital, Boston, MA
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12
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Nanoparticles in precision medicine for ovarian cancer: From chemotherapy to immunotherapy. Int J Pharm 2020; 591:119986. [DOI: 10.1016/j.ijpharm.2020.119986] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/23/2020] [Accepted: 10/11/2020] [Indexed: 12/24/2022]
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13
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Singh B, Yang S, Krishna A, Sridhar S. Nanoparticle Formulations of Poly (ADP-ribose) Polymerase Inhibitors for Cancer Therapy. Front Chem 2020; 8:594619. [PMID: 33330383 PMCID: PMC7719718 DOI: 10.3389/fchem.2020.594619] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 11/02/2020] [Indexed: 12/16/2022] Open
Abstract
A number of poly(ADP-ribose) polymerase (PARP) inhibitors have been recently approved for clinical use in BRCA mutated and other cancers. However, off-target toxicity of PARP inhibitors and the emergence of drug resistance following prolonged administration of these inhibitors indicate the need for improved methods of drug delivery to the tumors. Nanomedicines based upon nanoparticle formulations of conventional small molecule drugs and inhibitors offer many advantages, such as increased solubility and bioavailability of drugs, reduced toxicity and drug resistance, and improved tissue selectivity and therapeutic efficacy. This review highlights the current trends in formulations of PARP inhibitors developed by nanotechnology approaches and provides an insight into the applications and limitations of these PARP inhibitor nanomedicines for cancer therapies.
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Affiliation(s)
- Bijay Singh
- Nanomedicine Innovation Center, Northeastern University, Boston, MA, United States.,Department of Physics, Northeastern University, Boston, MA, United States
| | - Shicheng Yang
- Nanomedicine Innovation Center, Northeastern University, Boston, MA, United States.,Department of Chemical Engineering, Northeastern University, Boston, MA, United States
| | - Apurva Krishna
- Nanomedicine Innovation Center, Northeastern University, Boston, MA, United States.,Department of Bioengineering, Northeastern University, Boston, MA, United States
| | - Srinivas Sridhar
- Nanomedicine Innovation Center, Northeastern University, Boston, MA, United States.,Department of Physics, Northeastern University, Boston, MA, United States.,Department of Chemical Engineering, Northeastern University, Boston, MA, United States.,Department of Bioengineering, Northeastern University, Boston, MA, United States.,Department of Radiation Oncology, Harvard Medical School, Boston, MA, United States
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14
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Tu C, Yang K, Wan L, He J, Qi L, Wang W, Lu Q, Li Z. The crosstalk between lncRNAs and the Hippo signalling pathway in cancer progression. Cell Prolif 2020; 53:e12887. [PMID: 32779318 PMCID: PMC7507458 DOI: 10.1111/cpr.12887] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/23/2020] [Accepted: 07/18/2020] [Indexed: 12/11/2022] Open
Abstract
LncRNAs play a pivotal role in the regulation of epigenetic modification, cell cycle, differentiation, proliferation, migration and other physiological activities. In particular, considerable studies have shown that the aberrant expression and dysregulation of lncRNAs are widely implicated in cancer initiation and progression by acting as tumour promoters or suppressors. Hippo signalling pathway has attracted researchers’ attention as one of the critical cancer‐related pathways in recent years. Increasing evidences have demonstrated that lncRNAs could interact with Hippo cascade and thereby contribute to acquisition of multiple malignant hallmarks, including proliferation, metastasis, relapse and resistance to anti‐cancer treatment. Specifically, Hippo signalling pathway is reported to modulate or be regulated by widespread lncRNAs. Intriguingly, certain lncRNAs could form a reciprocal feedback loop with Hippo signalling. More speculatively, lncRNAs related to Hippo pathway have been poised to become important putative biomarkers and therapeutic targets in human cancers. Herein, this review focuses on the crosstalk between lncRNAs and Hippo pathway in carcinogenesis, summarizes the comprehensive role of Hippo‐related lncRNAs in tumour progression and depicts their clinical diagnostic, prognostic or therapeutic potentials in tumours.
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Affiliation(s)
- Chao Tu
- Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, China.,Hunan Key Laboratory of Tumor Models and Individualized Medicine, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Kexin Yang
- Xiangya School of Medicine, Central South University, Changsha, China
| | - Lu Wan
- Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, China.,Hunan Key Laboratory of Tumor Models and Individualized Medicine, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Jieyu He
- Department of Geriatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Lin Qi
- Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, China.,Hunan Key Laboratory of Tumor Models and Individualized Medicine, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Wanchun Wang
- Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, China.,Hunan Key Laboratory of Tumor Models and Individualized Medicine, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Qiong Lu
- Hunan Key Laboratory of Tumor Models and Individualized Medicine, The Second Xiangya Hospital, Central South University, Changsha, China.,Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Zhihong Li
- Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, China.,Hunan Key Laboratory of Tumor Models and Individualized Medicine, The Second Xiangya Hospital, Central South University, Changsha, China
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15
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Baldwin P, Likhotvorik R, Baig N, Cropper J, Carlson R, Kurmasheva R, Sridhar S. Nanoformulation of Talazoparib Increases Maximum Tolerated Doses in Combination With Temozolomide for Treatment of Ewing Sarcoma. Front Oncol 2019; 9:1416. [PMID: 31921673 PMCID: PMC6928193 DOI: 10.3389/fonc.2019.01416] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 11/28/2019] [Indexed: 12/26/2022] Open
Abstract
The Pediatric Preclinical Testing Program previously identified the PARP inhibitor talazoparib (TLZ) as a means to potentiate temozolomide (TMZ) activity for the treatment of Ewing sarcoma. However, the combination of TLZ and TMZ has been toxic in both preclinical and clinical testing, necessitating TMZ dose reduction to ~15% of the single agent maximum tolerated dose. We have synthesized a nanoparticle formulation of talazoparib (NanoTLZ) to be administered intravenously in an effort to modulate the toxicity profile of this combination treatment. Results in Ewing sarcoma xenograft models are presented to demonstrate the utility of this delivery method both alone and in combination with TMZ. NanoTLZ reduced gross toxicity and had a higher maximum tolerated dose than oral TLZ. The dose of TMZ did not have to be reduced when combined with NanoTLZ as was required when combined with oral TLZ. This indicated the NanoTLZ delivery system may be advantageous in decreasing the systemic toxicity associated with the combination of oral TLZ and TMZ.
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Affiliation(s)
- Paige Baldwin
- Department of Bioengineering, Northeastern University, Boston, MA, United States
| | | | - Nabeela Baig
- Greehey Children's Cancer Research Institute, San Antonio, TX, United States
| | - Jodie Cropper
- Greehey Children's Cancer Research Institute, San Antonio, TX, United States
| | - Ruth Carlson
- Greehey Children's Cancer Research Institute, San Antonio, TX, United States
| | - Raushan Kurmasheva
- Greehey Children's Cancer Research Institute, San Antonio, TX, United States.,Department of Molecular Medicine, The University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Srinivas Sridhar
- Department of Bioengineering, Northeastern University, Boston, MA, United States.,Department of Physics, Northeastern University, Boston, MA, United States.,Division of Radiation Oncology, Harvard Medical School, Boston, MA, United States
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16
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Zhang D, Baldwin P, Leal AS, Carapellucci S, Sridhar S, Liby KT. A nano-liposome formulation of the PARP inhibitor Talazoparib enhances treatment efficacy and modulates immune cell populations in mammary tumors of BRCA-deficient mice. Am J Cancer Res 2019; 9:6224-6238. [PMID: 31534547 PMCID: PMC6735511 DOI: 10.7150/thno.36281] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 07/22/2019] [Indexed: 12/28/2022] Open
Abstract
Two recently approved PARP inhibitors provide an important new therapeutic option for patients with BRCA-mutated metastatic breast cancer. PARP inhibitors significantly prolong progression-free survival in patients, but conventional oral delivery of PARP inhibitors is hindered by limited bioavailability and off-target toxicities, thus compromising the therapeutic benefits and quality of life for patients. Here, we developed a new delivery system, in which the PARP inhibitor Talazoparib is encapsulated in the bilayer of a nano-liposome, to overcome these limitations. Methods: Nano-Talazoparib (NanoTLZ) was characterized both in vitro and in vivo. The therapeutic efficacy and toxicity of Nano-Talazoparib (NanoTLZ) were evaluated in BRCA-deficient mice. The regulation of NanoTLZ on gene transcription and immunomodulation were further investigated in spontaneous BRCA-deficient tumors. Results: NanoTLZ significantly (p<0.05) prolonged the overall survival of BRCA-deficient mice compared to all of the other experimental groups, including saline control, empty nanoparticles, and free Talazoparib groups (oral and i.v.). Moreover, NanoTLZ was better tolerated than treatment with free Talazoparib, with no significant weight lost or alopecia as was observed with the free drug. After 5 doses, NanoTLZ altered the expression of over 140 genes and induced DNA damage, cell cycle arrest and inhibition of cell proliferation in the tumor. In addition, NanoTLZ favorably modulated immune cell populations in vivo and significantly (p<0.05) decreased the percentage of myeloid derived suppressor cells in both the tumor and spleen compared to control groups. Conclusions: Our results demonstrate that delivering nanoformulated Talazoparib not only enhances treatment efficacy but also reduces off-target toxicities in BRCA-deficient mice; the same potential is predicted for patients with BRCA-deficient breast cancer.
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