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diZerega GS, Maulhardt HA, Verco SJ, Marin AM, Baltezor MJ, Mauro SA, Iacobucci MA. Intratumoral Injection of Large Surface Area Microparticle Taxanes in Carcinomas Increases Immune Effector Cell Concentrations, Checkpoint Expression, and Synergy with Checkpoint Inhibitors: A Review of Preclinical and Clinical Studies. Oncol Ther 2024; 12:31-55. [PMID: 38289576 PMCID: PMC10881942 DOI: 10.1007/s40487-024-00261-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 01/04/2024] [Indexed: 02/23/2024] Open
Abstract
This review summarizes development of large surface area microparticle paclitaxel (LSAM-PTX) and docetaxel (LSAM-DTX) for local treatment of primary carcinomas with emphasis on immunomodulation. Intratumoral (IT) delivery of LSAM-PTX and LSAM-DTX provides continuous, therapeutic drug levels for several weeks. Preclinical studies and clinical trials reported a reduction in tumor volume (TV) and immunomodulation in primary tumor and peripheral blood with increases in innate and adaptive immune cells and decreases in suppressor cells. Increased levels of checkpoint expression of immune cells occurred in clinical trials of high-risk non-muscle-invasive bladder cancer (LSAM-DTX) and unresectable localized pancreatic cancer (LSAM-PTX). TV reduction and increases in immune effector cells occurred following IT LSAM-DTX and IT LSAM-PTX together with anti-mCTLA-4 and anti-mPD-1, respectively. Synergistic benefits from combinatorial therapy in a 4T1-Luc breast cancer model included reduction of metastasis with IT LSAM-DTX + anti-mCTLA-4. IT LSAM-PTX and LSAM-DTX are tumoricidal, immune enhancing, and may improve solid tumor response to immune checkpoint inhibitors without additional systemic toxicity.
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Affiliation(s)
- Gere S diZerega
- US Biotest, Inc., 231 Bonetti Drive, Suite 240, San Luis Obispo, CA, 93401, USA.
- NanOlogy, LLC., 3909 Hulen Street, Fort Worth, TX, 76107, USA.
| | - Holly A Maulhardt
- US Biotest, Inc., 231 Bonetti Drive, Suite 240, San Luis Obispo, CA, 93401, USA
| | - Shelagh J Verco
- US Biotest, Inc., 231 Bonetti Drive, Suite 240, San Luis Obispo, CA, 93401, USA
| | - Alyson M Marin
- US Biotest, Inc., 231 Bonetti Drive, Suite 240, San Luis Obispo, CA, 93401, USA
| | | | - Samantha A Mauro
- US Biotest, Inc., 231 Bonetti Drive, Suite 240, San Luis Obispo, CA, 93401, USA
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Al Khatib AO, El-Tanani M, Al-Obaidi H. Inhaled Medicines for Targeting Non-Small Cell Lung Cancer. Pharmaceutics 2023; 15:2777. [PMID: 38140117 PMCID: PMC10748026 DOI: 10.3390/pharmaceutics15122777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/02/2023] [Accepted: 12/11/2023] [Indexed: 12/24/2023] Open
Abstract
Throughout the years, considerable progress has been made in methods for delivering drugs directly to the lungs, which offers enhanced precision in targeting specific lung regions. Currently, for treatment of lung cancer, the prevalent routes for drug administration are oral and parenteral. These methods, while effective, often come with side effects including hair loss, nausea, vomiting, susceptibility to infections, and bleeding. Direct drug delivery to the lungs presents a range of advantages. Notably, it can significantly reduce or even eliminate these side effects and provide more accurate targeting of malignancies. This approach is especially beneficial for treating conditions like lung cancer and various respiratory diseases. However, the journey towards perfecting inhaled drug delivery systems has not been without its challenges, primarily due to the complex structure and functions of the respiratory tract. This comprehensive review will investigate delivery strategies that target lung cancer, specifically focusing on non-small-cell lung cancer (NSCLC)-a predominant variant of lung cancer. Within the scope of this review, active and passive targeting techniques are covered which highlight the roles of advanced tools like nanoparticles and lipid carriers. Furthermore, this review will shed light on the potential synergies of combining inhalation therapy with other treatment approaches, such as chemotherapy and immunotherapy. The goal is to determine how these combinations might amplify therapeutic results, optimizing patient outcomes and overall well-being.
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Affiliation(s)
- Arwa Omar Al Khatib
- School of Pharmacy, University of Reading, Reading RG6 6AD, UK
- Faculty of Pharmacy, Al Ahliyya Amman University, Amman 19111, Jordan
| | - Mohamed El-Tanani
- Faculty of Pharmacy, Al Ahliyya Amman University, Amman 19111, Jordan
- College of Pharmacy, RAK Medical and Health Sciences University, Ras Al Khaimah P.O. Box 11172, United Arab Emirates
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Qamar SUR, Spahić L, Benolić L, Zivanovic M, Filipović N. Treatment of Peripheral Artery Disease Using Injectable Biomaterials and Drug-Coated Balloons: Safety and Efficacy Perspective. Pharmaceutics 2023; 15:1813. [PMID: 37514000 PMCID: PMC10385947 DOI: 10.3390/pharmaceutics15071813] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 06/01/2023] [Accepted: 06/15/2023] [Indexed: 07/30/2023] Open
Abstract
The possibility of injectable biomaterials being used in the therapy of peripheral artery disease (PAD) is investigated in this article. We conducted a thorough review of the literature on the use and efficacy of biomaterials (BMs) and drug-coated balloons (DCBs). These BMs included hydrogels, collagen scaffolds, and nanoparticles. These BMs could be used alone or in combination with growth factors, stem cells, or gene therapy. The treatment of peripheral artery disease with DCBs is increasingly common in the field of interventional angiology. Studies have been carried out to examine the effectiveness of paclitaxel-coated balloons such as PaccocathTM in lowering the frequency with which further revascularization operations are required. PCB angioplasty and angioplasty without paclitaxel did not significantly vary in terms of mortality, according to the findings of a recent meta-analysis that included the results of four randomized controlled studies. On the other hand, age was found to be a factor that predicted mortality. There was a correlation between the routine utilization of scoring balloon angioplasty along with DCBs and improved clinical outcomes in de novo lesions. In both preclinical and clinical testing, the SelutionTM DCB has demonstrated efficacy and safety, but further research is required to determine whether or not it is effective and safe over the long term. In addition, we reviewed the difficulties involved in bringing injectable BMs-based medicines to clinical trials, including the approval processes required by regulatory bodies. Injectable BMs have a significant amount of therapeutic promise for PAD, which highlights the need for more research and clinical studies to be conducted in this field. In conclusion, this research focuses on the potential of injectable BMs and DCBs in the treatment of PAD as well as the hurdles that must be overcome in order to translate these treatments into clinical trials. In this particular field, there is a demand for further research as well as clinical trials.
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Affiliation(s)
- Safi Ur Rehman Qamar
- Bioengineering Research and Development Centre (BioIRC), Prvoslava Stojanovića 6, 34000 Kragujevac, Serbia; (L.S.); (L.B.); (N.F.)
- Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Serbia
| | - Lemana Spahić
- Bioengineering Research and Development Centre (BioIRC), Prvoslava Stojanovića 6, 34000 Kragujevac, Serbia; (L.S.); (L.B.); (N.F.)
- Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Serbia
| | - Leo Benolić
- Bioengineering Research and Development Centre (BioIRC), Prvoslava Stojanovića 6, 34000 Kragujevac, Serbia; (L.S.); (L.B.); (N.F.)
- Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Serbia
| | - Marko Zivanovic
- Institute for Information Technologies Kragujevac, University of Kragujevac, Jovana Cvijića бб, 34000 Kragujevac, Serbia;
| | - Nenad Filipović
- Bioengineering Research and Development Centre (BioIRC), Prvoslava Stojanovića 6, 34000 Kragujevac, Serbia; (L.S.); (L.B.); (N.F.)
- Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Serbia
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Ferguson LT, Ma X, Myerson JW, Wu J, Glassman PM, Zamora ME, Hood ED, Zaleski M, Shen M, Essien EO, Shuvaev VV, Brenner JS. Mechanisms by Which Liposomes Improve Inhaled Drug Delivery for Alveolar Diseases. ADVANCED NANOBIOMED RESEARCH 2023; 3:2200106. [PMID: 37266328 PMCID: PMC10231510 DOI: 10.1002/anbr.202200106] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 11/23/2022] [Indexed: 01/29/2023] Open
Abstract
Diseases of the pulmonary alveolus, such as pulmonary fibrosis, are leading causes of morbidity and mortality, but exceedingly few drugs are developed for them. A major reason for this gap is that after inhalation, drugs are quickly whisked away from alveoli due to their high perfusion. To solve this problem, the mechanisms by which nano-scale drug carriers dramatically improve lung pharmacokinetics using an inhalable liposome formulation containing nintedanib, an antifibrotic for pulmonary fibrosis, are studied. Direct instillation of liposomes in murine lung increases nintedanib's total lung delivery over time by 8000-fold and lung half life by tenfold, compared to oral nintedanib. Counterintuitively, it is shown that pulmonary surfactant neither lyses nor aggregates the liposomes. Instead, each lung compartment (alveolar fluid, alveolar leukocytes, and parenchyma) elutes liposomes over 24 h, likely serving as "drug depots." After deposition in the surfactant layer, liposomes are transferred over 3-6 h to alveolar leukocytes (which take up a surprisingly minor 1-5% of total lung dose instilled) in a nonsaturable fashion. Further, all cell layers of the lung parenchyma take up liposomes. These and other mechanisms elucidated here should guide engineering of future inhaled nanomedicine for alveolar diseases.
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Affiliation(s)
- Laura T. Ferguson
- Department of MedicinePulmonary, Allergy, and Critical Care DivisionPerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA19104USA
| | - Xiaonan Ma
- Department of MedicinePulmonary, Allergy, and Critical Care DivisionPerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA19104USA
| | - Jacob W. Myerson
- Department of Systems Pharmacology and Translational TherapeuticsPerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA19104USA
| | - Jichuan Wu
- Department of MedicinePulmonary, Allergy, and Critical Care DivisionPerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA19104USA
| | - Patrick M. Glassman
- Department of Systems Pharmacology and Translational TherapeuticsPerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA19104USA
| | - Marco E. Zamora
- School of Biomedical Engineering, Science, and Health SystemsDrexel UniversityPhiladelphiaPA19104USA
| | - Elizabeth D. Hood
- Department of Systems Pharmacology and Translational TherapeuticsPerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA19104USA
| | - Michael Zaleski
- Department of Systems Pharmacology and Translational TherapeuticsPerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA19104USA
| | - Mengwen Shen
- Emergency Medicine DepartmentYueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese Medicine200437ShanghaiChina
- Department of MicrobiologyPerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA19104USA
| | - Eno-Obong Essien
- Department of MedicinePulmonary, Allergy, and Critical Care DivisionPerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA19104USA
| | - Vladimir V. Shuvaev
- Department of Systems Pharmacology and Translational TherapeuticsPerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA19104USA
| | - Jacob S. Brenner
- Department of MedicinePulmonary, Allergy, and Critical Care DivisionPerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA19104USA
- Department of Systems Pharmacology and Translational TherapeuticsPerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA19104USA
- Penn-CHOP Lung Biology InstitutePerelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA19104USA
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Maulhardt H, Marin A, Hesseltine H, diZerega G. Submicron particle docetaxel intratumoral injection in combination with anti-mCTLA-4 into 4T1-Luc orthotopic implants reduces primary tumor and metastatic pulmonary lesions. Med Oncol 2021; 38:106. [PMID: 34331595 PMCID: PMC8325653 DOI: 10.1007/s12032-021-01555-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 07/24/2021] [Indexed: 01/19/2023]
Abstract
We describe here characterization of the response of local and metastatic disease and immunomodulation following intratumoral (IT) injection of submicron particle docetaxel (SPD) administered alone or in combination with systemic antibody anti-mCTLA-4 (anti-mCTLA-4) in the metastatic 4T1-Luc2-1A4 (4T1) murine breast cancer model. In-life assessments of treatment tolerance, tumor volume (TV), and metastasis were performed (n = 10 animals/group). At study end, immune cell populations in tumor-site tissues and peripheral blood were analyzed using flow cytometry. Signs of distress typical of this aggressive tumor model occurred across all animals except for the combination treated which were asymptomatic and gained weight. TV at study end was significantly reduced in the combination group versus untreated [43% reduced (p < 0.05)] and vehicle controls [54% reduced (p < 0.0001)]. No evidence of thoracic metastasis was found in 40% of combination group animals and thoracic bioluminescence imaging (BLI) was reduced vs. untreated controls (p < 0.01). Significant elevations (p < 0.05) in CD4 + T, CD4 + helper T, Treg, and NKT cells were found in tumor and blood in SPD or combination treatment compared to controls or anti-mCTLA-4. Combination treatment increased tumor-associated CD8 + T cells (p < 0.01), peripheral B cells (p < 0.01), and tumor associated and circulating dendritic cells (DC) (p < 0.05). Tumor-associated NK cells were significantly increased in SPD ± anti-mCTLA-4 treatments (p < 0.01). Myeloid-derived suppressor cells (MDSC) were reduced in bloods in SPD ± anti-mCTLA-4 groups (p < 0.05). These data demonstrate that both SPD and anti-mCTLA-4 produce local anti-tumor effects as well as reductions in metastasis which are significantly enhanced when administered in combination.
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MESH Headings
- Animals
- Antibodies, Monoclonal/chemistry
- Antibodies, Monoclonal/pharmacology
- Antineoplastic Agents/chemistry
- Antineoplastic Agents/pharmacology
- CTLA-4 Antigen/antagonists & inhibitors
- CTLA-4 Antigen/immunology
- Combined Modality Therapy
- Docetaxel/administration & dosage
- Docetaxel/chemistry
- Docetaxel/pharmacology
- Female
- Immune Checkpoint Inhibitors/pharmacology
- Injections, Intralesional
- Killer Cells, Natural/immunology
- Lung Neoplasms/drug therapy
- Lung Neoplasms/immunology
- Lung Neoplasms/metabolism
- Lung Neoplasms/secondary
- Lymphocytes, Tumor-Infiltrating/immunology
- Mammary Neoplasms, Animal/drug therapy
- Mammary Neoplasms, Animal/immunology
- Mammary Neoplasms, Animal/metabolism
- Mammary Neoplasms, Animal/pathology
- Mice
- Mice, Inbred BALB C
- Myeloid-Derived Suppressor Cells/immunology
- Particle Size
- T-Lymphocytes, Regulatory/immunology
- Tumor Burden
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Affiliation(s)
- Holly Maulhardt
- US Biotest, Inc., 231 Bonetti Drive, Suite 240, San Luis Obispo, CA, USA
| | - Alyson Marin
- US Biotest, Inc., 231 Bonetti Drive, Suite 240, San Luis Obispo, CA, USA
| | - Holly Hesseltine
- US Biotest, Inc., 231 Bonetti Drive, Suite 240, San Luis Obispo, CA, USA
| | - Gere diZerega
- US Biotest, Inc., 231 Bonetti Drive, Suite 240, San Luis Obispo, CA, USA.
- NanOlogy, LLC., 3909 Hulen Street, Fort Worth, TX, USA.
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Feng G, Zhuang Y, Feng J, Zhao J, Zhong C, Chen S, Chen J. Development of A 3D-Printed Navigational Template for Establishing Rabbit VX2 Lung Cancer Model. J Surg Res 2021; 267:358-365. [PMID: 34198112 DOI: 10.1016/j.jss.2021.05.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 05/08/2021] [Accepted: 05/26/2021] [Indexed: 11/25/2022]
Abstract
BACKGROUND The CT-guided percutaneous puncture-inoculation for establishing the rabbit VX2 lung cancer model (LCM) is time-consuming, requires repeated CT scans, and has a high complication rate. Therefore, this study aimed to develop a navigational template using 3D technology to provide an alternative method for establishing the model with improved success and complication rates. MATERIALS AND METHODS Ideal pressure was determined using chest CT data from 15 anesthetized rabbits fitted with sphygmomanometer cuff around their chests. Subsequently, a preliminary 3D template with a square window and cross-sign to facilitate precise installation was designed. Using another 20 rabbits fixed with the preliminary template, an ideal common puncture point and parameter were determined, a navigational tunnel was set up on the template surface, and the final puncture navigational template was printed out. Eight-four rabbits (42/group) were assigned to the experimental (template-guided puncture) and control (traditional puncutre) groups and underwent VX2 tumor-fragment inoculation to validate the template. Differences in various parameters between two groups were analyzed. RESULTS The ideal pressure was 30 mmHg. All rabbits were inoculated successfully and the template adequately fit the rabbit chest. The experimental group displayed significantly better operation time (198.93±36.64 vs 735.14±91.19 seconds); number of CT scans (0 vs 7.19±1.64); pneumothorax (11.9% vs 35.7%), chest seeding (16.7% vs 35.7%), and mid-lung field tumor-bearing (88.1% vs 59.5%) rates than the control group (all, P <0.05). The groups did not differ in rib injury, tumor volume or survival time (all, P > 0.05). CONCLUSIONS We successfully developed a puncture navigational template, providing an alternative method for establishing the rabbit VX2 LCM.
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Affiliation(s)
- Guodong Feng
- Department of Radiology, Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research & The Affiliated Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, P.R. China.
| | - Yiping Zhuang
- Department of Radiology, Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research & The Affiliated Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, P.R. China
| | - Jianfang Feng
- Department of Radiology, Jiyuan Hospital of Traditional Chinese Medicine, Jiyuan, Henan, P.R. China
| | - Jiawei Zhao
- School of Food Science, Nanjing Normal University, Nanjing, P.R. China
| | - Chuan Zhong
- School of Food Science, Nanjing Normal University, Nanjing, P.R. China
| | - Shilin Chen
- Department of Radiology, Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research & The Affiliated Cancer Hospital of Nanjing Medical University, Nanjing, Jiangsu, P.R. China
| | - Jun Chen
- Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tenth People's Hospital of Tongji University, Shanghai, P.R. China
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Local administration of submicron particle paclitaxel to solid carcinomas induces direct cytotoxicity and immune-mediated tumoricidal effects without local or systemic toxicity: preclinical and clinical studies. Drug Deliv Transl Res 2020; 11:1806-1817. [PMID: 33159289 PMCID: PMC8421313 DOI: 10.1007/s13346-020-00868-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/12/2020] [Indexed: 12/18/2022]
Abstract
This report describes local administration of submicron particle paclitaxel (SPP) (NanoPac®: ~ 800-nm-sized particles with high relative surface area with each particle containing ~ 2 billion molecules of paclitaxel) in preclinical models and clinical trials evaluating treatment of carcinomas. Paclitaxel is active in the treatment of epithelial solid tumors including ovarian, peritoneal, pancreatic, breast, esophageal, prostate, and non-small cell lung cancer. SPP has been delivered directly to solid tumors, where the particles are retained and continuously release the drug, exposing primary tumors to high, therapeutic levels of paclitaxel for several weeks. As a result, tumor cell death shifts from primarily apoptosis to both apoptosis and necroptosis. Direct local tumoricidal effects of paclitaxel, as well as stimulation of innate and adaptive immune responses, contribute to antineoplastic effects. Local administration of SPP may facilitate tumor response to systemically administered chemotherapy, targeted therapy, or immunotherapy without contributing to systemic toxicity. Results of preclinical and clinical investigations described here suggest that local administration of SPP achieves clinical benefit with negligible toxicity and may complement standard treatments for metastatic disease.
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Shen AM, Minko T. Pharmacokinetics of inhaled nanotherapeutics for pulmonary delivery. J Control Release 2020; 326:222-244. [PMID: 32681948 PMCID: PMC7501141 DOI: 10.1016/j.jconrel.2020.07.011] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 06/25/2020] [Accepted: 07/10/2020] [Indexed: 10/23/2022]
Abstract
Pulmonary delivery of lipid-based nanotherapeutics by inhalation presents an advantageous alternative to oral and intravenous routes of administration that avoids enzymatic degradation in gastrointestinal tract and hepatic first pass metabolism and also limits off-target adverse side effects upon heathy tissues. For lung-related indications, inhalation provides localized delivery in order to enhance therapeutic efficacy at the site of action. Optimization of physicochemical properties, selected drug and inhalation format can greatly influence the pharmacokinetic behavior of inhaled nanoparticle systems and their payloads. The present review analyzes a wide range of nanoparticle systems, their formulations and consequent effect on pharmacokinetic distribution of delivered active components after inhalation.
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Affiliation(s)
- Andrew M Shen
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, the State University of New Jersey, Piscataway, NJ 08854, USA
| | - Tamara Minko
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, the State University of New Jersey, Piscataway, NJ 08854, USA; Rutgers Cancer Institute of New Jersey, New Brunswick, NJ 08903, USA; Environmental and Occupational Health Science Institute, Piscataway, NJ 08854, USA.
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9
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Maulhardt HA, Marin AM, diZerega GS. Intratumoral submicron particle docetaxel inhibits syngeneic Renca renal cancer growth and increases CD4+, CD8+, and Treg levels in peripheral blood. Invest New Drugs 2020; 38:1618-1626. [PMID: 32198648 PMCID: PMC7497695 DOI: 10.1007/s10637-020-00922-5] [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: 01/17/2020] [Accepted: 03/09/2020] [Indexed: 11/27/2022]
Abstract
Administration of chemotherapeutics as direct injections into tumors offers increased anti-tumor activity and reduced systemic toxicity. In this study, the Renca syngeneic murine xenograft model of renal cancer was used to evaluate the effects of intratumoral (IT) submicron particle docetaxel (NanoDoce®) on tumor growth and immunomodulation. Tumor volume (TV) was compared to controls, including intravenous (IV) chemotherapy. Flow cytometry of peripheral bloods and tumors was used to evaluate immune cell populations. Groups of animals were inoculated with a second Renca tumor at a site distant from the primary tumor. IT NanoDoce significantly reduced primary TV and reduced the growth rates of untreated secondary tumors. CD4+, CD8+ and Treg populations were increased in peripheral bloods from animals administered IT NanoDoce. Additional evaluation of the effect of IT NanoDoce on peripheral and local immune cell populations as well as the impact on sites of distant tumor growth are warranted.
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Affiliation(s)
- Holly A Maulhardt
- US Biotest, Inc., 231 Bonetti Drive, Suite 240, San Luis Obispo, CA, 93401, USA
| | - Alyson M Marin
- US Biotest, Inc., 231 Bonetti Drive, Suite 240, San Luis Obispo, CA, 93401, USA
| | - Gere S diZerega
- US Biotest, Inc., 231 Bonetti Drive, Suite 240, San Luis Obispo, CA, 93401, USA. .,NanOlogy, LLC., 3909 Hulen Street, Fort Worth, TX, 76107, USA.
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