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Tilsed CM, Fisher SA, Nowak AK, Lake RA, Lesterhuis WJ. Cancer chemotherapy: insights into cellular and tumor microenvironmental mechanisms of action. Front Oncol 2022; 12:960317. [PMID: 35965519 PMCID: PMC9372369 DOI: 10.3389/fonc.2022.960317] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 07/01/2022] [Indexed: 12/12/2022] Open
Abstract
Chemotherapy has historically been the mainstay of cancer treatment, but our understanding of what drives a successful therapeutic response remains limited. The diverse response of cancer patients to chemotherapy has been attributed principally to differences in the proliferation rate of the tumor cells, but there is actually very little experimental data supporting this hypothesis. Instead, other mechanisms at the cellular level and the composition of the tumor microenvironment appear to drive chemotherapy sensitivity. In particular, the immune system is a critical determinant of chemotherapy response with the depletion or knock-out of key immune cell populations or immunological mediators completely abrogating the benefits of chemotherapy in pre-clinical models. In this perspective, we review the literature regarding the known mechanisms of action of cytotoxic chemotherapy agents and the determinants of response to chemotherapy from the level of individual cells to the composition of the tumor microenvironment. We then summarize current work toward the development of dynamic biomarkers for response and propose a model for a chemotherapy sensitive tumor microenvironment.
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Affiliation(s)
- Caitlin M. Tilsed
- National Centre for Asbestos Related Diseases, Institute for Respiratory Health, Nedlands, WA, Australia
- School of Biomedical Sciences, University of Western Australia, Crawley, WA, Australia
| | - Scott A. Fisher
- National Centre for Asbestos Related Diseases, Institute for Respiratory Health, Nedlands, WA, Australia
- School of Biomedical Sciences, University of Western Australia, Crawley, WA, Australia
| | - Anna K. Nowak
- National Centre for Asbestos Related Diseases, Institute for Respiratory Health, Nedlands, WA, Australia
- Medical School, University of Western Australia, Crawley, WA, Australia
- Department of Medical Oncology, Sir Charles Gairdner Hospital, Nedlands, WA, Australia
| | - Richard A. Lake
- National Centre for Asbestos Related Diseases, Institute for Respiratory Health, Nedlands, WA, Australia
- School of Biomedical Sciences, University of Western Australia, Crawley, WA, Australia
| | - W. Joost Lesterhuis
- National Centre for Asbestos Related Diseases, Institute for Respiratory Health, Nedlands, WA, Australia
- School of Biomedical Sciences, University of Western Australia, Crawley, WA, Australia
- Telethon Kids Institute, University of Western Australia, West Perth, WA, Australia
- *Correspondence: W. Joost Lesterhuis,
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Choudhary S, Doshi A, Luckett-Chastain L, Ihnat M, Hamel E, Mooberry SL, Gangjee A. Potential of substituted quinazolines to interact with multiple targets in the treatment of cancer. Bioorg Med Chem 2021; 35:116061. [PMID: 33647840 PMCID: PMC7995636 DOI: 10.1016/j.bmc.2021.116061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 01/28/2021] [Accepted: 02/01/2021] [Indexed: 12/12/2022]
Abstract
The efficacy of quinazoline-based antiglioma agents has been attributed to their effects on microtubule dynamics.1,2 The design, synthesis and biological evaluation of quinazolines as potent inhibitors of multiple intracellular targets, including microtubules and multiple RTKs, is described. In addition to the known ability of quinazolines 1 and 2 to cause microtubule depolymerization, they were found to be low nanomolar inhibitors of EGFR, VEGFR-2 and PDGFR-β. Low nanomolar inhibition of EGFR was observed for 1-3 and 9-10. Compounds 1 and 4 inhibited VEGFR-2 kinase with activity better than or equal to that of sunitinib. In addition, compounds 1 and 2 had similar potency to sunitinib in the CAM angiogenesis assay. Multitarget activities of compounds in the present study demonstrates that the quinazolines can affect multiple pathways and could lead to these agents having antitumor potential caused by their activity against multiple targets.
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Affiliation(s)
- Shruti Choudhary
- Division of Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, Duquesne University, 600 Forbes Avenue, Pittsburgh, PA 15282, United States
| | - Arpit Doshi
- Division of Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, Duquesne University, 600 Forbes Avenue, Pittsburgh, PA 15282, United States
| | - Lerin Luckett-Chastain
- College of Pharmacy, University of Oklahoma Health Science Center, 1110 North Stonewall, Oklahoma City, OK 73117, United States
| | - Michael Ihnat
- College of Pharmacy, University of Oklahoma Health Science Center, 1110 North Stonewall, Oklahoma City, OK 73117, United States
| | - Ernest Hamel
- Molecular Pharmacology Branch, Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, Frederick National Laboratory for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, United States
| | - Susan L Mooberry
- Department of Pharmacology, Mays Cancer Center, University of Texas Health Science Center, San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229, United States
| | - Aleem Gangjee
- Division of Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, Duquesne University, 600 Forbes Avenue, Pittsburgh, PA 15282, United States.
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Athira VR, Saranya MK, Shivanandappa T, Yajurvedi HN. Multiple dose treatment reduces cyclophosphamide-induced ovarian follicular loss in mice. Birth Defects Res 2019; 112:71-80. [PMID: 31643145 DOI: 10.1002/bdr2.1603] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 08/18/2019] [Accepted: 09/21/2019] [Indexed: 12/16/2022]
Abstract
This study compares the effects of single dose and multiple dose treatment of cyclophosphamide (CP) on oxidative stress-mediated follicular damage in mouse ovary. In the first experiment, adult female mice were administered with a single dose of CP (100 mg/kg body weight/mouse) and autopsied 72 hr after treatment. In the second experiment, adult female mice were injected with multiple doses of CP (40 mg/kg body weight/day/mouse for 10 consecutive days) and sacrificed on Day 11. There was a 58, 48, 53, and 51% loss of primordial, primary, preantral, and antral follicles, respectively, following the administration of a single dose of CP, whereas, multiple dose of CP caused only 35% reduction in primordial follicles coupled with 28, 23, and 38%, loss of primary, preantral, and antral follicles, respectively. There was a decrease in activities of the ovarian antioxidant enzymes and increase in reactive oxygen species (ROS) and malondialdehyde (MDA) concentrations following single dose CP, whereas multiple dose treatment caused an increase in activities of these enzymes and decrease in ROS and MDA concentrations. The serum concentration of estradiol was significantly decreased following single or multiple dose treatment. The ovarian damage caused by a single high dose of CP administration is higher than that by multiple doses of smaller amount, though the total amount of CP administered was higher with multiple treatment. The results of the current study reveal the benefit of metronomic chemotherapy in cancer treatment, for its effectiveness in reducing ovarian toxicity, a major side effect in young female patients.
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Filippi R, Lombardi P, Depetris I, Fenocchio E, Quarà V, Chilà G, Aglietta M, Leone F. Rationale for the use of metronomic chemotherapy in gastrointestinal cancer. Expert Opin Pharmacother 2018; 19:1451-1463. [PMID: 30161003 DOI: 10.1080/14656566.2018.1512585] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Metronomic chemotherapy (mCT) is endowed with various properties, ranging from antiangiogenic to immunomodulation, and may revert tumor resistance to conventional drug administration. A variety of antineoplastic agents displayed activity when administered with metronomic schedules in preclinical models of gastrointestinal cancers. However, most of the field is still unexplored. AREAS COVERED Herein, the authors review the existing literature from PubMed, concerning the use of mCT in gastrointestinal oncology. EXPERT OPINION A mounting body of evidence is emerging in support of mCT as a treatment option for gastrointestinal tumors, but the frequent signs of clinical activity inconsistently translate into a benefit for survival. Research in this field should focus on providing high-quality evidence on the safety and efficacy of mCT, with more prospective, comparative trials; identifying the subgroups of patients for whom mCT would be the best approach; establishing standardized protocols based on mCT pharmacokinetics and pharmacodynamics; developing drug activity biomarkers. mCT is also potentially suitable for combinations with targeted antiangiogenic drugs and may be incorporated with conventional administration into dual regimens.
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Affiliation(s)
- Roberto Filippi
- a Department of Oncology , University of Turin , Candiolo , Italy.,b Medical Oncology , Candiolo Cancer Institute FPO-IRCCS , Candiolo , Italy
| | - Pasquale Lombardi
- a Department of Oncology , University of Turin , Candiolo , Italy.,b Medical Oncology , Candiolo Cancer Institute FPO-IRCCS , Candiolo , Italy
| | - Ilaria Depetris
- a Department of Oncology , University of Turin , Candiolo , Italy.,b Medical Oncology , Candiolo Cancer Institute FPO-IRCCS , Candiolo , Italy
| | - Elisabetta Fenocchio
- a Department of Oncology , University of Turin , Candiolo , Italy.,b Medical Oncology , Candiolo Cancer Institute FPO-IRCCS , Candiolo , Italy
| | - Virginia Quarà
- a Department of Oncology , University of Turin , Candiolo , Italy.,b Medical Oncology , Candiolo Cancer Institute FPO-IRCCS , Candiolo , Italy
| | - Giovanna Chilà
- a Department of Oncology , University of Turin , Candiolo , Italy.,b Medical Oncology , Candiolo Cancer Institute FPO-IRCCS , Candiolo , Italy
| | - Massimo Aglietta
- a Department of Oncology , University of Turin , Candiolo , Italy.,b Medical Oncology , Candiolo Cancer Institute FPO-IRCCS , Candiolo , Italy
| | - Francesco Leone
- a Department of Oncology , University of Turin , Candiolo , Italy.,b Medical Oncology , Candiolo Cancer Institute FPO-IRCCS , Candiolo , Italy
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Morotti M, Dass PH, Harris AL, Lord S. Pharmacodynamic and Pharmacokinetic Markers For Anti-angiogenic Cancer Therapy: Implications for Dosing and Selection of Patients. Eur J Drug Metab Pharmacokinet 2018; 43:137-153. [PMID: 29019020 DOI: 10.1007/s13318-017-0442-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Angiogenesis is integral to tumour growth and invasion, and is a key target for cancer therapeutics. However, for many of the licensed indications, only a modest clinical benefit has been observed for both monoclonal antibody and small-molecule tyrosine kinase inhibitor anti-angiogenic therapy. Pre-clinical and clinical studies have attempted to evaluate circulating, imaging, genomic, pharmacokinetic, and pharmacodynamic markers that may aid both the selection of patients for treatment and define dosing. Correct dosing is likely to be critical in the context of vascular normalization to allow better delivery of concomitant anti-cancer therapy and novel imaging techniques hold much promise in the early evaluation of pharmacodynamic response to improve efficacy.
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Affiliation(s)
- Matteo Morotti
- Hypoxia and Angiogenesis Group, Cancer Research UK Molecular Oncology Laboratories, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Headington, Oxford, OX3 9DS, UK.
- Department of Gynaecology Oncology, University of Oxford, Oxford, UK.
- Department of Oncology, Churchill Hospital, University of Oxford, Oxford, OX3 9DU, UK.
| | - Prashanth Hari Dass
- Department of Oncology, Churchill Hospital, University of Oxford, Oxford, OX3 9DU, UK
| | - Adrian L Harris
- Hypoxia and Angiogenesis Group, Cancer Research UK Molecular Oncology Laboratories, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Headington, Oxford, OX3 9DS, UK
- Department of Oncology, Churchill Hospital, University of Oxford, Oxford, OX3 9DU, UK
| | - Simon Lord
- Hypoxia and Angiogenesis Group, Cancer Research UK Molecular Oncology Laboratories, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Headington, Oxford, OX3 9DS, UK
- Department of Oncology, Churchill Hospital, University of Oxford, Oxford, OX3 9DU, UK
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Kwak G, Jo SD, Kim D, Kim H, Kim MG, Kim K, Kwon IC, Kim SH. Synergistic antitumor effects of combination treatment with metronomic doxorubicin and VEGF-targeting RNAi nanoparticles. J Control Release 2017; 267:203-213. [DOI: 10.1016/j.jconrel.2017.08.015] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 08/08/2017] [Accepted: 08/14/2017] [Indexed: 12/12/2022]
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Al-Abd AM, Alamoudi AJ, Abdel-Naim AB, Neamatallah TA, Ashour OM. Anti-angiogenic agents for the treatment of solid tumors: Potential pathways, therapy and current strategies - A review. J Adv Res 2017; 8:591-605. [PMID: 28808589 PMCID: PMC5544473 DOI: 10.1016/j.jare.2017.06.006] [Citation(s) in RCA: 121] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 06/20/2017] [Accepted: 06/26/2017] [Indexed: 02/08/2023] Open
Abstract
Recent strategies for the treatment of cancer, other than just tumor cell killing have been under intensive development, such as anti-angiogenic therapeutic approach. Angiogenesis inhibition is an important strategy for the treatment of solid tumors, which basically depends on cutting off the blood supply to tumor micro-regions, resulting in pan-hypoxia and pan-necrosis within solid tumor tissues. The differential activation of angiogenesis between normal and tumor tissues makes this process an attractive strategic target for anti-tumor drug discovery. The principles of anti-angiogenic treatment for solid tumors were originally proposed in 1972, and ever since, it has become a putative target for therapies directed against solid tumors. In the early twenty first century, the FDA approved anti-angiogenic drugs, such as bevacizumab and sorafenib for the treatment of several solid tumors. Over the past two decades, researches have continued to improve the performance of anti-angiogenic drugs, describe their drug interaction potential, and uncover possible reasons for potential treatment resistance. Herein, we present an update to the pre-clinical and clinical situations of anti-angiogenic agents and discuss the most recent trends in this field.
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Affiliation(s)
- Ahmed M Al-Abd
- Pharmacology Department, Medical Division, National Research Centre, Dokki, Giza, Egypt.,Department of Pharmacology and Toxicology, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia.,Biomedical Research Section, Nawah Scientific, Mokkatam, Cairo, Egypt
| | - Abdulmohsin J Alamoudi
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ashraf B Abdel-Naim
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Thikryat A Neamatallah
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Osama M Ashour
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Pharmacology, Faculty of Medicine, Minia University, El-Minia 61519, Egypt
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Fuso Nerini I, Cesca M, Bizzaro F, Giavazzi R. Combination therapy in cancer: effects of angiogenesis inhibitors on drug pharmacokinetics and pharmacodynamics. CHINESE JOURNAL OF CANCER 2016; 35:61. [PMID: 27357621 PMCID: PMC4928348 DOI: 10.1186/s40880-016-0123-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 05/10/2016] [Indexed: 12/15/2022]
Abstract
Validated preclinical studies have provided evidence that anti-vascular endothelial growth factor (VEGF) compounds enhance the activity of subsequent antitumor therapy, but the mechanism of this potentiation is far from clear. The most widespread explanation is enhanced delivery of therapeutics due to vascular remodeling, lower interstitial pressure, and increased blood flow. While the antiangiogenic effects on vascular morphology have been fairly consistent in both preclinical and clinical settings, the improvement of tumor vessel function is debated. This review focuses on the effect of anti-VEGF therapy on tumor microenvironment morphology and functions, and its therapeutic benefits when combined with other therapies. The uptake and spatial distribution of chemotherapeutic agents into the tumor after anti-VEGF are examined.
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Affiliation(s)
- Ilaria Fuso Nerini
- Department of Oncology, IRCCS-Mario Negri Institute for Pharmacological Research, Via La Masa 19, 20156, Milan, Italy
| | - Marta Cesca
- Department of Oncology, IRCCS-Mario Negri Institute for Pharmacological Research, Via La Masa 19, 20156, Milan, Italy
| | - Francesca Bizzaro
- Department of Oncology, IRCCS-Mario Negri Institute for Pharmacological Research, Via La Masa 19, 20156, Milan, Italy
| | - Raffaella Giavazzi
- Department of Oncology, IRCCS-Mario Negri Institute for Pharmacological Research, Via La Masa 19, 20156, Milan, Italy.
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Kubota M, Shimizu M, Baba A, Ohno T, Kochi T, Shirakami Y, Moriwaki H. Combination of bevacizumab and acyclic retinoid inhibits the growth of hepatocellular carcinoma xenografts. J Nutr Sci Vitaminol (Tokyo) 2015; 60:357-62. [PMID: 25744425 DOI: 10.3177/jnsv.60.357] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The prognosis of patients with hepatocellular carcinoma (HCC) is poor and the development of effective treatments for this malignancy, including combination chemotherapy, is required. This study examined the possible combined inhibitory effects of bevacizumab, an anti-vascular endothelial growth factor monoclonal antibody, and acyclic retinoid (ACR), which can prevent the development of HCC, on the growth of Huh7 human HCC cells. Xenograft tumors were produced by subcutaneously injecting Huh7 cells into nude mice. Starting 1 wk after the tumor cell injection, the mice were treated with bevacizumab alone (5 mg/kg body weight, subcutaneous injection, twice a week), ACR alone (given in a diet containing 0.03%), or their combination for 6 wk, and the effects of these regimens on xenograft growth were examined. Combined treatment with bevacizumab plus ACR significantly suppressed the growth of Huh7 xenografts. The combination of these agents significantly inhibited the phosphorylation of the Akt protein in tumor tissues. With combination therapy, the population of Ki-67-positive cells in xenografts decreased, while that of TUNEL-positive cells increased. The combination of bevacizumab and ACR exerts growth-suppressing effects on HCC cells by inhibiting cell proliferation and inducing apoptosis. This combination might be an effective regimen for the treatment of HCC.
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Affiliation(s)
- Masaya Kubota
- Department of Gastroenterology/Internal Medicine, Gifu University Graduate School of Medicine
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Siemann DW, Horsman MR. Modulation of the tumor vasculature and oxygenation to improve therapy. Pharmacol Ther 2015; 153:107-24. [PMID: 26073310 DOI: 10.1016/j.pharmthera.2015.06.006] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 06/03/2015] [Indexed: 12/12/2022]
Abstract
The tumor microenvironment is increasingly recognized as a major factor influencing the success of therapeutic treatments and has become a key focus for cancer research. The progressive growth of a tumor results in an inability of normal tissue blood vessels to oxygenate and provide sufficient nutritional support to tumor cells. As a consequence the expanding neoplastic cell population initiates its own vascular network which is both structurally and functionally abnormal. This aberrant vasculature impacts all aspects of the tumor microenvironment including the cells, extracellular matrix, and extracellular molecules which together are essential for the initiation, progression and spread of tumor cells. The physical conditions that arise are imposing and manifold, and include elevated interstitial pressure, localized extracellular acidity, and regions of oxygen and nutrient deprivation. No less important are the functional consequences experienced by the tumor cells residing in such environments: adaptation to hypoxia, cell quiescence, modulation of transporters and critical signaling molecules, immune escape, and enhanced metastatic potential. Together these factors lead to therapeutic barriers that create a significant hindrance to the control of cancers by conventional anticancer therapies. However, the aberrant nature of the tumor microenvironments also offers unique therapeutic opportunities. Particularly interventions that seek to improve tumor physiology and alleviate tumor hypoxia will selectively impair the neoplastic cell populations residing in these environments. Ultimately, by combining such therapeutic strategies with conventional anticancer treatments it may be possible to bring cancer growth, invasion, and metastasis to a halt.
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Affiliation(s)
- Dietmar W Siemann
- Department of Radiation Oncology, University of Florida Health Cancer Center, Gainesville, FL, USA.
| | - Michael R Horsman
- Department of Experimental Clinical Oncology, Aarhus University Hospital-NBG, Aarhus, Denmark
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Broggini-Tenzer A, Sharma A, Nytko KJ, Bender S, Vuong V, Orlowski K, Hug D, O'Reilly T, Pruschy M. Combined treatment strategies for microtubule stabilizing agent-resistant tumors. J Natl Cancer Inst 2015; 107:dju504. [PMID: 25694444 DOI: 10.1093/jnci/dju504] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Resistance to microtubule-stabilizing agents is a major hurdle for successful cancer therapy. We investigated combined treatment of microtubule-stabilizing agents (MSAs) with inhibitors of angiogenesis to overcome MSA resistance. METHODS Treatment regimens of clinically relevant MSAs (patupilone and paclitaxel) and antiangiogenic agents (everolimus and bevacizumab) were investigated in genetically defined MSA-resistant lung (A549EpoB40) and colon adenocarcinoma (SW480) tumor xenografts in nude mice (CD1-Foxn1<nu>, ICRnu; 5-14 per group). Tumor growth delays were calculated by Kaplan-Meier analysis with Holm-Sidak tests. All statistical tests were two-sided. RESULTS Inhibition of mTOR-kinase by everolimus only minimally reduced the proliferative activity of β tubulin-mutated lung adenocarcinoma cells alone and in combination with the MSA patupilone, but everolimus inhibited expression and secretion of vascular endothelial growth factor (VEGF) from these cells. mTOR-kinase inhibition strongly sensitized tumor xenografts derived from these otherwise MSA-resistant tumor cells to patupilone. Tumors treated with the combined modality of everolimus and patupilone had statistically significantly reduced tumor volume and stronger tumor growth delay (16.2 ± 1.01 days) than control- (7.7 ± 0.3 days, P = .004), patupilone- (10 ± 0.97 days, P = .009), and everolimus-treated (10.6 ± 1.4 days, P = .014) tumors. A combined treatment modality with bevacizumab also resensitized this MSA-refractory tumor model to patupilone. Treatment combination also strongly reduced microvessel density, corroborating the relevance of VEGF targeting for the known antivasculature-directed potency of MSA alone in MSA-sensitive tumor models. Resensitization to MSAs was also probed in P glycoprotein-overexpressing SW480-derived tumor xenografts. Different bevacizumab regimens also sensitized this otherwise-resistant tumor model to clinically relevant MSA paclitaxel. CONCLUSIONS A treatment combination of MSAs with antiangiogenic agents is potent to overcome tumor cell-linked MSA resistance and should be considered as strategy for MSA-refractory tumor entities.
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Affiliation(s)
- Angela Broggini-Tenzer
- Laboratory for Molecular Radiobiology, Radiation Oncology, University Hospital Zurich, Zurich, Switzerland (ABT, AS, KJN, SB, VV, KO, DH, TOR, MP); Department of Dermatology, University Hospital Zurich, Zurich, Switzerland (DH); Clinical Research Priority Program Tumor Oxygenation, University Hospital Zurich, Zurich, Switzerland (KJN, MP).Current affiliation: Novartis Pharma Switzerland (KO)
| | - Ashish Sharma
- Laboratory for Molecular Radiobiology, Radiation Oncology, University Hospital Zurich, Zurich, Switzerland (ABT, AS, KJN, SB, VV, KO, DH, TOR, MP); Department of Dermatology, University Hospital Zurich, Zurich, Switzerland (DH); Clinical Research Priority Program Tumor Oxygenation, University Hospital Zurich, Zurich, Switzerland (KJN, MP).Current affiliation: Novartis Pharma Switzerland (KO)
| | - Katarzyna J Nytko
- Laboratory for Molecular Radiobiology, Radiation Oncology, University Hospital Zurich, Zurich, Switzerland (ABT, AS, KJN, SB, VV, KO, DH, TOR, MP); Department of Dermatology, University Hospital Zurich, Zurich, Switzerland (DH); Clinical Research Priority Program Tumor Oxygenation, University Hospital Zurich, Zurich, Switzerland (KJN, MP).Current affiliation: Novartis Pharma Switzerland (KO)
| | - Sabine Bender
- Laboratory for Molecular Radiobiology, Radiation Oncology, University Hospital Zurich, Zurich, Switzerland (ABT, AS, KJN, SB, VV, KO, DH, TOR, MP); Department of Dermatology, University Hospital Zurich, Zurich, Switzerland (DH); Clinical Research Priority Program Tumor Oxygenation, University Hospital Zurich, Zurich, Switzerland (KJN, MP).Current affiliation: Novartis Pharma Switzerland (KO)
| | - Van Vuong
- Laboratory for Molecular Radiobiology, Radiation Oncology, University Hospital Zurich, Zurich, Switzerland (ABT, AS, KJN, SB, VV, KO, DH, TOR, MP); Department of Dermatology, University Hospital Zurich, Zurich, Switzerland (DH); Clinical Research Priority Program Tumor Oxygenation, University Hospital Zurich, Zurich, Switzerland (KJN, MP).Current affiliation: Novartis Pharma Switzerland (KO)
| | - Katrin Orlowski
- Laboratory for Molecular Radiobiology, Radiation Oncology, University Hospital Zurich, Zurich, Switzerland (ABT, AS, KJN, SB, VV, KO, DH, TOR, MP); Department of Dermatology, University Hospital Zurich, Zurich, Switzerland (DH); Clinical Research Priority Program Tumor Oxygenation, University Hospital Zurich, Zurich, Switzerland (KJN, MP).Current affiliation: Novartis Pharma Switzerland (KO)
| | - Daniel Hug
- Laboratory for Molecular Radiobiology, Radiation Oncology, University Hospital Zurich, Zurich, Switzerland (ABT, AS, KJN, SB, VV, KO, DH, TOR, MP); Department of Dermatology, University Hospital Zurich, Zurich, Switzerland (DH); Clinical Research Priority Program Tumor Oxygenation, University Hospital Zurich, Zurich, Switzerland (KJN, MP).Current affiliation: Novartis Pharma Switzerland (KO)
| | - Terence O'Reilly
- Laboratory for Molecular Radiobiology, Radiation Oncology, University Hospital Zurich, Zurich, Switzerland (ABT, AS, KJN, SB, VV, KO, DH, TOR, MP); Department of Dermatology, University Hospital Zurich, Zurich, Switzerland (DH); Clinical Research Priority Program Tumor Oxygenation, University Hospital Zurich, Zurich, Switzerland (KJN, MP).Current affiliation: Novartis Pharma Switzerland (KO)
| | - Martin Pruschy
- Laboratory for Molecular Radiobiology, Radiation Oncology, University Hospital Zurich, Zurich, Switzerland (ABT, AS, KJN, SB, VV, KO, DH, TOR, MP); Department of Dermatology, University Hospital Zurich, Zurich, Switzerland (DH); Clinical Research Priority Program Tumor Oxygenation, University Hospital Zurich, Zurich, Switzerland (KJN, MP).Current affiliation: Novartis Pharma Switzerland (KO).
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Metronomic chemotherapy: possible clinical application in advanced hepatocellular carcinoma. Transl Oncol 2013; 6:511-9. [PMID: 24151531 DOI: 10.1593/tlo.13481] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 07/22/2013] [Accepted: 07/24/2013] [Indexed: 12/15/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is a hypervascular highly angiogenic tumor usually associated with liver cirrhosis. Vascular endothelial growth factor plays a critical role in vascular development in HCC. In contrast to the treatment of early-stage HCC, the treatment options for advanced HCC are limited and prognosis is often poor, which contributes to this tumor type being the third leading cause of cancer-related deaths worldwide. Metronomic chemotherapy, which was originally designed to inhibit angiogenesis, involves low-dose chemotherapeutic agents administered in a frequent regular schedule with no prolonged breaks and minimizes severe toxicities. We reviewed the potential effects and impact of metronomic chemotherapy in preclinical studies with HCC models and in patients with advanced HCC, especially when combined with a molecular targeted agent. Metronomic chemotherapy involves multiple mechanisms that include antiangiogenesis and antivasculogenesis, immune stimulation by reducing regulatory T cells and inducing dendritic cell maturation, and possibly some direct tumor cell targeting effects, including the cancer stem cell subpopulation. The total number of preclinical studies with HCC models shows impressive results using metronomic chemotherapy-based protocols, especially in conjunction with molecular targeted agents. Four clinical trials and two case reports evaluating metronomic chemotherapy for HCC indicate it to be a safe and potentially useful treatment for HCC. Several preclinical and clinical HCC studies suggest that metronomic chemotherapy may become an alternative type of chemotherapy for advanced unresectable HCC and postsurgical adjuvant treatment of HCC.
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Cao Z, Shang B, Zhang G, Miele L, Sarkar FH, Wang Z, Zhou Q. Tumor cell-mediated neovascularization and lymphangiogenesis contrive tumor progression and cancer metastasis. Biochim Biophys Acta Rev Cancer 2013; 1836:273-86. [PMID: 23933263 DOI: 10.1016/j.bbcan.2013.08.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Revised: 07/22/2013] [Accepted: 08/01/2013] [Indexed: 12/12/2022]
Abstract
Robust neovascularization and lymphangiogenesis have been found in a variety of aggressive and metastatic tumors. Endothelial sprouting angiogenesis is generally considered to be the major mechanism by which new vasculature forms in tumors. However, increasing evidence shows that tumor vasculature is not solely composed of endothelial cells (ECs). Some tumor cells acquire processes similar to embryonic vasculogenesis and produce new vasculature through vasculogenic mimicry, trans-differentiation of tumor cells into tumor ECs, and tumor cell-EC vascular co-option. In addition, tumor cells secrete various vasculogenic factors that induce sprouting angiogenesis and lymphangiogenesis. Vasculogenic tumor cells actively participate in the formation of vascular cancer stem cell niche and a premetastatic niche. Therefore, tumor cell-mediated neovascularization and lymphangiogenesis are closely associated with tumor progression, cancer metastasis, and poor prognosis. Vasculogenic tumor cells have emerged as key players in tumor neovascularization and lymphangiogenesis and play pivotal roles in tumor progression and cancer metastasis. However, the mechanisms underlying tumor cell-mediated vascularity as they relate to tumor progression and cancer metastasis remain unclear. Increasing data have shown that various intrinsic and extrinsic factors activate oncogenes and vasculogenic genes, enhance vasculogenic signaling pathways, and trigger tumor neovascularization and lymphangiogenesis. Collectively, tumor cells are the instigators of neovascularization. Therefore, targeting vasculogenic tumor cells, genes, and signaling pathways will open new avenues for anti-tumor vasculogenic and metastatic drug discovery. Dual targeting of endothelial sprouting angiogenesis and tumor cell-mediated neovascularization and lymphangiogenesis may overcome current clinical problems with anti-angiogenic therapy, resulting in significantly improved anti-angiogenesis and anti-cancer therapies.
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Affiliation(s)
- Zhifei Cao
- Cyrus Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Soochow University, Suzhou, Jiangsu 215006, China
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