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Kato Y, Mawatari K. Clinical significance of acidic extracellular microenvironment modulated genes. Front Oncol 2024; 14:1380679. [PMID: 39372863 PMCID: PMC11449683 DOI: 10.3389/fonc.2024.1380679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 08/21/2024] [Indexed: 10/08/2024] Open
Abstract
Background The extracellular pH (pH e ) is known to be acidic. We investigated the effect of mild (pH e 6.8) and severe (pH e 5.9) acidosis on gene expression in mouse B16-BL6 melanoma cells using cDNA microarray analysis and compared them with the acidic pH e dependence of human tumors. Methods B16-BL6 cells were treated with pH e 7.4 (control), pH e 6.8, and pH e 5.9. The mRNA expression was analyzed by using the cDNA microarray. Heat map, volcano plot, and gene ontology enrichment analysis were performed. The data were compared with the gene signatures of published data GSE52031 and GSE8401 and compared with the pathological staging by GEPIA2, and the prognostic signature of proteins was searched by the Human Protein Atlas database. If the acidic pH e -induced and -reduced genes were correlated with shortened and prolonged survival times, respectively, and also correlated with pathological staging, we defined it as "hit" and counted the sum of hit points of eight types of tumors such as breast, colorectal, prostate, gastric, liver, prostate, lung, and head and neck and melanoma. Results Gene expression was differentially and commonly regulated by both pH e s. The number of genes upregulated fourfold or more at pH e 6.8 and 5.9 only for 25 and 131 genes, respectively, and 85 genes were common. The number of genes downregulated fourfold or less at pH e 6.8 and 5.9 only for 63 and 82 genes, respectively, and 118 genes were common. Compared with human mRNA expression data (GSE8401), there is no correlation with the overall pattern of the signature. In seven types of cancer (breast, colorectal, gastric, liver, prostate, lung, and head and neck) and melanoma, the relationship between acidic pH e -modulated gene expression and overall survival was evaluated. As a result, acidic pH e dependency contributing to prognosis was higher in colorectal, lung, and head and neck cancers and lower in prostate cancer. Conclusion Tumor classification based on response to extracellular acidic pH e will provide new insights into chemotherapy strategy for patients with tumors.
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Affiliation(s)
- Yasumasa Kato
- Department of Oral Function and Molecular Biology, Ohu University School of
Dentistry, Koriyama, Japan
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2
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Bogdanov A, Verlov N, Bogdanov A, Burdakov V, Semiletov V, Egorenkov V, Volkov N, Moiseyenko V. Tumor alkalization therapy: misconception or good therapeutics perspective? - the case of malignant ascites. Front Oncol 2024; 14:1342802. [PMID: 38390269 PMCID: PMC10881708 DOI: 10.3389/fonc.2024.1342802] [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: 11/22/2023] [Accepted: 01/24/2024] [Indexed: 02/24/2024] Open
Abstract
Tumor acidity has been identified as a key factor in promoting cancer progression, metastasis, and resistance. Tumor alkalization therapy has emerged as a potential strategy for cancer treatment. This article provides preclinical and clinical evidence for tumor alkalization therapy as a promising cancer treatment strategy. The potential of tumor alkalization therapy using sodium bicarbonate in the treatment of malignant ascites was studied. The concept of intraperitoneal perfusion with an alkalizing solution to increase the extracellular pH and its antitumor effect were explored. The significant extension in the overall survival of the Ehrlich ascites carcinoma mice treated with sodium bicarbonate solution compared to those treated with a sodium chloride solution was observed. In the sodium bicarbonate group, mice had a median survival of 30 days after tumor cell injection, which was significantly (p<0.05) different from the median survival of 18 days in the sodium chloride group and 14 days in the intact group. We also performed a case study of a patient with ovarian cancer malignant ascites resistant to previous lines of chemotherapy who underwent intraperitoneal perfusions with a sodium bicarbonate solution, resulting in a significant drop of CA-125 levels from 5600 U/mL to 2200 U/mL in and disappearance of ascites, indicating the potential effectiveness of the treatment. The preclinical and clinical results obtained using sodium bicarbonate perfusion in the treatment of malignant ascites represent a small yet significant contribution to the evolving field of tumor alkalization as a cancer therapy. They unequivocally affirm the good prospects of this concept.
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Affiliation(s)
- Alexey Bogdanov
- Napalkov Saint Petersburg Clinical Research and Practical Center of Specialized Types of Medical Care (Oncological), Saint Petersburg, Russia
| | - Nikolay Verlov
- Napalkov Saint Petersburg Clinical Research and Practical Center of Specialized Types of Medical Care (Oncological), Saint Petersburg, Russia
| | - Andrey Bogdanov
- Napalkov Saint Petersburg Clinical Research and Practical Center of Specialized Types of Medical Care (Oncological), Saint Petersburg, Russia
| | - Vladimir Burdakov
- Napalkov Saint Petersburg Clinical Research and Practical Center of Specialized Types of Medical Care (Oncological), Saint Petersburg, Russia
| | - Valeriy Semiletov
- Napalkov Saint Petersburg Clinical Research and Practical Center of Specialized Types of Medical Care (Oncological), Saint Petersburg, Russia
| | - Vitaliy Egorenkov
- Napalkov Saint Petersburg Clinical Research and Practical Center of Specialized Types of Medical Care (Oncological), Saint Petersburg, Russia
| | - Nikita Volkov
- Napalkov Saint Petersburg Clinical Research and Practical Center of Specialized Types of Medical Care (Oncological), Saint Petersburg, Russia
| | - Vladimir Moiseyenko
- Napalkov Saint Petersburg Clinical Research and Practical Center of Specialized Types of Medical Care (Oncological), Saint Petersburg, Russia
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Patrucco D, Cutrin JC, Longo DL, Botto E, Cong L, Aime S, Delli Castelli D. In Situ Insonation of Alkaline Buffer Containing Liposomes Leads to a Net Improvement of the Therapeutic Outcome in a Triple Negative Breast Cancer Murine Model. Adv Healthc Mater 2023; 12:e2301480. [PMID: 37709294 DOI: 10.1002/adhm.202301480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 09/12/2023] [Indexed: 09/16/2023]
Abstract
Breast cancer is characterized by an acidic micro-environment. Acidic extracellular pH gives cancer cells an evolutionary advantage, hence, neutralization of the extracellular pH has been considered as a potential therapeutic strategy. To address the issue of systemic pH alteration, an approach based on the targeted delivery of the buffering solution to the tumor region is investigated. The method relies on the use of low frequency ultrasound and sono-sensitive liposomes loaded with buffers at alkaline pH (LipHUS). After the i.v. injection of LipHUS, the application of ultrasound (US) at the sites of the pathology induces a local increase of pH that results highly effective in i) inhibiting primary tumor growth, ii) reducing tumor recurrence after surgery, and iii) suppressing metastases' formation. The experiments are carried out on a triple negative breast cancer mouse model. The results obtained demonstrate that localized and triggered release of bicarbonate or PBS buffer from sonosensitive liposomes represents an efficient therapeutic tool for treating triple-negative breast cancer. This approach holds promise for potential clinical translation.
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Affiliation(s)
- Deyssy Patrucco
- Department of Molecular Biotechnology and Health Science, University of Turin, Via Nizza 52, Turin, 10126, Italy
| | - Juan Carlos Cutrin
- Department of Molecular Biotechnology and Health Science, University of Turin, Via Nizza 52, Turin, 10126, Italy
| | - Dario Livio Longo
- Istituto di Biostrutture e Bioimmagini (IBB), Consiglio Nazionale delle Ricerche (CNR), Via Tommaso De Amicis, 95, Naples, 80145, Italy
| | - Elena Botto
- Istituto di Biostrutture e Bioimmagini (IBB), Consiglio Nazionale delle Ricerche (CNR), Via Tommaso De Amicis, 95, Naples, 80145, Italy
| | - Li Cong
- Key Laboratory of Smart Drug Delivery, Ministry of Education, School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Silvio Aime
- IRCCS SDN, SYNLAB, Via Gianturco 113, Naples, 80143, Italy
| | - Daniela Delli Castelli
- Department of Molecular Biotechnology and Health Science, University of Turin, Via Nizza 52, Turin, 10126, Italy
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Abrahams D, Ibrahim-Hashim A, Ackerman RS, Brown JS, Whelan CJ, Garfinkel MB, Gatenby RA, Muncey AR. Immunomodulatory and pro-oncologic effects of ketamine and isoflurane anesthetics in a murine model. PLoS One 2023; 18:e0292492. [PMID: 37816047 PMCID: PMC10564181 DOI: 10.1371/journal.pone.0292492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 09/21/2023] [Indexed: 10/12/2023] Open
Abstract
INTRODUCTION Volatile and intravenous anesthetics may worsen oncologic outcomes in basic science animal models. These effects may be related to suppressed innate and adaptive immunity, decreased immunosurveillance, and disrupted cellular signaling. We hypothesized that anesthetics would promote lung tumor growth via altered immune function in a murine model and tested this using an immunological control group of immunodeficient mice. METHODS Lewis lung carcinoma cells were injected via tail vein into C57BL/6 immunocompetent and NSG immunodeficient mice during exposure to isoflurane and ketamine versus controls without anesthesia. Mice were imaged on days 0, 3, 10, and 14 post-tumor cell injection. On day 14, mice were euthanized and organs fixed for metastasis quantification and immunohistochemistry staining. We compared growth of tumors measured from bioluminescent imaging and tumor metastasis in ex vivo bioluminescent imaging of lung and liver. RESULTS Metastases were significantly greater for immunocompromised NSG mice than immunocompetent C57BL/6 mice over the 14-day experiment (partial η2 = 0.67, 95% CI = 0.54, 0.76). Among immunocompetent mice, metastases were greatest for mice receiving ketamine, intermediate for those receiving isoflurane, and least for control mice (partial η2 = 0.88, 95% CI = 0.82, 0.91). In immunocompetent mice, significantly decreased T lymphocyte (partial η2 = 0.83, 95% CI = 0.29, 0.93) and monocyte (partial η2 = 0.90, 95% CI = 0.52, 0.96) infiltration was observed in anesthetic-treated mice versus controls. CONCLUSIONS The immune system appears central to the pro-metastatic effects of isoflurane and ketamine in a murine model, with decreased T lymphocytes and monocytes likely playing a role.
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Affiliation(s)
- Dominique Abrahams
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, United States of America
| | - Arig Ibrahim-Hashim
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, United States of America
- Department of Integrative Biology, College of Arts and Sciences, University of South Florida, Tampa, Florida, United States of America
| | - Robert S. Ackerman
- Morsani College of Medicine, University of South Florida, Tampa, Florida, United States of America
- Department of Anesthesiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, United States of America
| | - Joel S. Brown
- Department of Integrative Biology, College of Arts and Sciences, University of South Florida, Tampa, Florida, United States of America
- Morsani College of Medicine, University of South Florida, Tampa, Florida, United States of America
- Department of Integrated Mathematical Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, United States of America
- Department of Biological Sciences, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Christopher J. Whelan
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, United States of America
- Department of Biological Sciences, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Megan B. Garfinkel
- Department of Biological Sciences, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Robert A. Gatenby
- Department of Radiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, United States of America
- Department of Cancer Biology and Evolution, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, United States of America
| | - Aaron R. Muncey
- Morsani College of Medicine, University of South Florida, Tampa, Florida, United States of America
- Department of Anesthesiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, United States of America
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Gillies RJ, Ibrahim-Hashim A, Ordway B, Gatenby RA. Back to basic: Trials and tribulations of alkalizing agents in cancer. Front Oncol 2022; 12:981718. [PMID: 36452492 PMCID: PMC9702334 DOI: 10.3389/fonc.2022.981718] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 10/25/2022] [Indexed: 09/12/2023] Open
Abstract
UNLABELLED "Dysregulated" metabolism is a characteristic of the cancer cell phenotype. This includes persistent use of glycolytic metabolism in normoxic environments (Warburg effect) leading to increased acid production and accumulation of protons in the interstitial space. Although often thought to be disordered, altered cancer metabolism is the outcome of intense Darwinian selection and, thus, must have evolved to maximize cancer cell fitness. In an evolutionary context, cancer-induced acidification of the microenvironment represents a niche construction strategy to promote proliferation. Ecological advantages conferred on the cancer population included remodeling of the extracellular matrix to promote local invasion, suppression of potential competitive proliferation of fibroblasts, and suppression of host immune response. Preclinical data demonstrates that increasing the serum buffering capacity (through, for example, oral sodium bicarbonate and TRIS) can neutralize the acidic tumor microenvironment with inhibition local invasion and proliferation which can be synergistic with the effects of chemotherapy and immunotherapy agents. Here, we describe the proton dynamics in cancer and their influence on tumor progression and metastasis. Additionally, we will discuss targeting the tumor acidosis with alkalizing agents including our bicarbonate clinical trial results. CLINICAL TRIAL REGISTRATION clinicaltrials.gov, identifier NCT01350583, NCT01198821 and NCT01846429.
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Affiliation(s)
- Robert J. Gillies
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center, Tampa, FL, United States
- Department of Radiology, H. Lee Moffitt Cancer Center, Tampa, FL, United States
| | - Arig Ibrahim-Hashim
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center, Tampa, FL, United States
| | - Bryce Ordway
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center, Tampa, FL, United States
| | - Robert A. Gatenby
- Department of Radiology, H. Lee Moffitt Cancer Center, Tampa, FL, United States
- Department of Integrated Mathematical Oncology, H. Lee Moffitt Cancer Center, Tampa, FL, United States
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Li T, Qiao T. Unraveling tumor microenvironment of small-cell lung cancer: implications for immunotherapy. Semin Cancer Biol 2022; 86:117-125. [PMID: 36183998 DOI: 10.1016/j.semcancer.2022.09.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 09/27/2022] [Accepted: 09/28/2022] [Indexed: 11/27/2022]
Abstract
Small-cell lung cancer (SCLC) is an aggressive lung cancer subtype and its first-line treatment has remained unchanged for decades. In recent years, immunotherapy has emerged as a therapeutic strategy for tumor treatment, whereas, patients with SCLC exhibit poor overall responses to immunotherapy alone, which highlights the necessity for combinatorial approaches. The tumor microenvironment (TME), an integral component in cancer, is widely implicated in tumorigenesis and tumor metastasis. The interactions of various cells within TME shape the adverse conditions of the tumor microenvironment (characterized by hypoxia, nutrient restriction, and acidity) and are considered responsible for the modest therapeutic responses to immunotherapy. Several studies have suggested that adverse TME can regulate immune cell activation and function. However, the specific regulatory mechanisms and their implications on immunotherapy remain unclear. Thus, it is worth unraveling the characteristics of TME and its impact on antitumor immunity, in the hope of devising novel strategies to reinforce immunotherapeutic effects on SCLC. In this review, we firstly elaborate on the immune landscape of SCLC and the formation of three remarkable characteristics in TME, as well as the interaction among them. Next, we summarize the latest findings regarding the impacts of adverse TME on immune cells and its targeted therapy in SCLC. Finally, we discuss the ongoing trials in combination therapy and potential directions of SCLC therapy. Collectively, the findings combined here are expected to aid the design of trials for combining immunotherapy with therapy targeting the TME of SCLC.
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Affiliation(s)
- Tian Li
- Western Theater Command Air Force Hospital, Chengdu 610065, China; School of Basic Medicine, Fourth Military Medical University, Xi'an 710032, China.
| | - Tianyun Qiao
- Department of Thoracic Surgery, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China.
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Cheng Y, Gong Y, Chen X, Zhang Q, Zhang X, He Y, Pan L, Ni B, Yang F, Xu Y, Zhou L, Yang Y, Chen W. Injectable adhesive hemostatic gel with tumor acidity neutralizer and neutrophil extracellular traps lyase for enhancing adoptive NK cell therapy prevents post-resection recurrence of hepatocellular carcinoma. Biomaterials 2022; 284:121506. [PMID: 35390709 DOI: 10.1016/j.biomaterials.2022.121506] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 03/20/2022] [Accepted: 03/30/2022] [Indexed: 12/22/2022]
Abstract
Post-resection recurrence remains an intractable problem in hepatocellular carcinoma (HCC) management. Natural killer (NK) cell infusion is considered as a promising cancer therapy, but acidic tumor microenvironment (TME) and neutrophil extracellular traps (NETs) greatly counteract its efficacy. Recently, polymer hydrogels have aroused much interest in tumor combination therapy, since they load and controllably release therapeutic agents with high bioavailability and low systemic toxicity. Therefore, a biocompatible hydrogel with tumor acidity neutralizer and NETs lyase may show promise for enhancing NK infusion to prevent post-resection HCC recurrence. Herein, a dual pH-responsive hydrogel with tumor acidity neutralizer (mesoporous bioactive glass nanoparticles) and NETs lyase (Deoxyribonuclease I, DNase I) is developed and used in combination with NK cell infusion for preventing post-resection HCC recurrence. The hydrogel can be injected to surgical margin and form an adhesive gel with a rapid hemostasis. Besides, it neutralizes tumor acidity to reduce tumor infiltration of immunosuppressive cells, and releases DNase I in a pH-responsive manner to degrade NETs. Moreover, this combination therapy significantly enhances NK cell infusion to combat post-surgical HCC recurrence without systemic toxicity. This study provides proof of concept that combination of NK cell adoptive therapy and hydrogel-based delivery system can successfully prevent post-resection HCC recurrence.
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Affiliation(s)
- Yusheng Cheng
- Department of Hepatic Surgery and Liver Transplantation Center & Guangdong Provincial Key Laboratory of Liver Disease Research, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510630, China
| | - Yihang Gong
- Department of Hepatic Surgery and Liver Transplantation Center & Guangdong Provincial Key Laboratory of Liver Disease Research, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510630, China
| | - Xiuxing Chen
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Department of Medical Oncology. Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Qi Zhang
- Biotherapy Centre & Cell-gene Therapy Translational Medicine Research Centre, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510630, China
| | - Xijian Zhang
- Department of Hepatic Surgery and Liver Transplantation Center & Guangdong Provincial Key Laboratory of Liver Disease Research, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510630, China
| | - Yizhan He
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Department of Medical Oncology. Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Lijie Pan
- Biotherapy Centre & Cell-gene Therapy Translational Medicine Research Centre, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510630, China
| | - Beibei Ni
- Biotherapy Centre & Cell-gene Therapy Translational Medicine Research Centre, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510630, China
| | - Fan Yang
- Biotherapy Centre & Cell-gene Therapy Translational Medicine Research Centre, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510630, China
| | - Yan Xu
- Biotherapy Centre & Cell-gene Therapy Translational Medicine Research Centre, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510630, China
| | - Lei Zhou
- Guangzhou Key Laboratory of Spine Disease Prevention and Treatment, Department of Spine Surgery, The Third Affiliated Hospital, Guangzhou Medical University, Guangzhou, 510150, China.
| | - Yang Yang
- Department of Hepatic Surgery and Liver Transplantation Center & Guangdong Provincial Key Laboratory of Liver Disease Research, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510630, China.
| | - Wenjie Chen
- Department of Hepatic Surgery and Liver Transplantation Center & Guangdong Provincial Key Laboratory of Liver Disease Research, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510630, China.
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9
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Cao S, Lin C, Li X, Liang Y, Saw PE. TME-Responsive Multistage Nanoplatform for siRNA Delivery and Effective Cancer Therapy. Int J Nanomedicine 2021; 16:5909-5921. [PMID: 34475756 PMCID: PMC8407678 DOI: 10.2147/ijn.s322901] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 08/09/2021] [Indexed: 12/12/2022] Open
Abstract
Since the discovery of RNA interference (RNAi), RNAi technology has rapidly developed into an efficient tool for post-transcriptional gene silencing, which has been widely used for clinical or preclinical treatment of various diseases including cancer. Small interfering RNA (siRNA) is the effector molecule of RNAi technology. However, as polyanionic macromolecules, naked siRNAs have a short circulatory half-life (<15 min) and is rapidly cleared by renal filtration, which greatly hinders their clinical application. Furthermore, the anionic and macromolecular characteristics of naked siRNAs impede their readiness to cross the cell membrane and therefore delivery vehicles are required to facilitate the cellular uptake and cytosolic delivery of naked siRNAs. In the past decade, numerous nanoparticles (NPs) such as liposomes have been employed for in vivo siRNA delivery, which have achieved favorable therapeutic outcomes in clinical disease treatment. In particular, because tumor microenvironment (TME) or tumor cells show several distinguishing biological/endogenous factors (eg, pH, enzymes, redox, and hypoxia) compared to normal tissues or cells, much attention has recently paid to design and construct TME-responsive NPs for multistaged siRNA delivery, which can respond to biological stimuli to achieve efficient in vivo gene silencing and better anticancer effect. In this review, we summarize recent advances in TME-responsive siRNA delivery systems, especially multistage delivery NPs, and discuss their design principles, functions, effects, and prospects.
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Affiliation(s)
- Shuwen Cao
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, People's Republic of China.,RNA Biomedical Institute, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Chunhao Lin
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, People's Republic of China.,RNA Biomedical Institute, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Xiuling Li
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, People's Republic of China.,RNA Biomedical Institute, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Yixia Liang
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, People's Republic of China.,RNA Biomedical Institute, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Phei Er Saw
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, People's Republic of China.,RNA Biomedical Institute, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, People's Republic of China
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10
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Gillies RJ. Cancer heterogeneity and metastasis: life at the edge. Clin Exp Metastasis 2021; 39:15-19. [PMID: 33999364 DOI: 10.1007/s10585-021-10101-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 04/28/2021] [Indexed: 01/05/2023]
Abstract
There is abundant evidence that the phenotype of cells the tumor at the stromal interface is distinct from the tumor cells that are within the core. Molecular phenotyping of cells at the edge show that they express higher levels of proteins associated with elevated glycolytic metabolism, including GLUT-1, HIF-1, and CA-IX. An end product of glycolysis is the production of acid, and acidosis of tumors is strongly associated with increased metastatic potential across a wide variety of tumor types. The molecular machinery promoting this export of acid is being defined, with close collaboration between carbonic anhydrases, sodium dependent bicarbonate and monocarboxylate transporters. Neutralization of this acidity can prevent local invasion and metastasis, and this has led to the "acid-mediated invasion hypothesis" wherein export of acid from the tumor into the stroma leads to matrix remodeling, which can promote local invasion.
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Affiliation(s)
- Robert J Gillies
- Department of Cancer Physiology, Moffitt Cancer Center, Tampa, FL, USA.
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11
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Stimuli-responsive hydrogels for intratumoral drug delivery. Drug Discov Today 2021; 26:2397-2405. [PMID: 33892147 DOI: 10.1016/j.drudis.2021.04.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/30/2021] [Accepted: 04/11/2021] [Indexed: 12/13/2022]
Abstract
The ability of some hydrogels to exhibit a phase transition or change their structure in response to stimuli has been extensively explored for drug depot formation and controlled drug release. Taking advantage of the unique features of the tumor microenvironment (TME) or externally applied triggers, several injectable stimuli-responsive hydrogels have been described as promising candidates for intratumoral drug delivery. In this review, we provide a brief overview of the TME and highlight the advantages of intratumoral administration, followed by a summary of the reported strategies to endow hydrogels with responsiveness to physical (temperature and light), chemical (pH and redox potential), or biological (enzyme) stimuli.
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12
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Wu H, Estrella V, Beatty M, Abrahams D, El-Kenawi A, Russell S, Ibrahim-Hashim A, Longo DL, Reshetnyak YK, Moshnikova A, Andreev OA, Luddy K, Damaghi M, Kodumudi K, Pillai SR, Enriquez-Navas P, Pilon-Thomas S, Swietach P, Gillies RJ. T-cells produce acidic niches in lymph nodes to suppress their own effector functions. Nat Commun 2020; 11:4113. [PMID: 32807791 PMCID: PMC7431837 DOI: 10.1038/s41467-020-17756-7] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 07/13/2020] [Indexed: 11/27/2022] Open
Abstract
The acidic pH of tumors profoundly inhibits effector functions of activated CD8 + T-cells. We hypothesize that this is a physiological process in immune regulation, and that it occurs within lymph nodes (LNs), which are likely acidic because of low convective flow and high glucose metabolism. Here we show by in vivo fluorescence and MR imaging, that LN paracortical zones are profoundly acidic. These acidic niches are absent in athymic Nu/Nu and lymphodepleted mice, implicating T-cells in the acidifying process. T-cell glycolysis is inhibited at the low pH observed in LNs. We show that this is due to acid inhibition of monocarboxylate transporters (MCTs), resulting in a negative feedback on glycolytic rate. Importantly, we demonstrate that this acid pH does not hinder initial activation of naïve T-cells by dendritic cells. Thus, we describe an acidic niche within the immune system, and demonstrate its physiological role in regulating T-cell activation.
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Affiliation(s)
- Hao Wu
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
- Cancer Institute, Second Affiliated Hospital, Zhejiang University School of Medicine, 310058, Hangzhou, P.R. China
| | - Veronica Estrella
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Matthew Beatty
- Department of Immunology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Dominique Abrahams
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Asmaa El-Kenawi
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
- Department of Immunology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Shonagh Russell
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Arig Ibrahim-Hashim
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Dario Livio Longo
- Institute of Biostructures and Bioimaging (IBB), National Research Council of Italy (CNR), Turin, Italy
| | - Yana K Reshetnyak
- Department of Physics, University of Rhode Island, Kingston, RI, 02881, USA
| | - Anna Moshnikova
- Department of Physics, University of Rhode Island, Kingston, RI, 02881, USA
| | - Oleg A Andreev
- Department of Physics, University of Rhode Island, Kingston, RI, 02881, USA
| | - Kimberly Luddy
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Mehdi Damaghi
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Krithika Kodumudi
- Department of Immunology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Smitha R Pillai
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Pedro Enriquez-Navas
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Shari Pilon-Thomas
- Department of Immunology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA
| | - Pawel Swietach
- Department of Physiology, Anatomy and Genetics, University of Oxford, Parks Road, Oxford, OX1 3PT, England, UK.
| | - Robert J Gillies
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, 33612, USA.
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13
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Abstract
Metabolism is a continuous source of acids. To keep up with a desired metabolic rate, tumors must establish an adequate means of clearing their acidic end-products. This homeostatic priority is achieved by various buffers, enzymes, and transporters connected through the common denominator of H+ ions. Whilst this complexity is proportionate to the importance of adequate pH control, it is problematic for developing an intuition for tracking the route taken by acids, assessing the relative importance of various acid-handling proteins, and predicting the outcomes of pharmacological inhibition or genetic alteration. Here, with the help of a simplified mathematical framework, the genesis of cancer pH regulation is explained in terms of the obstacles to efficient acid venting and how these are overcome by specific molecules, often associated with cancer. Ultimately, the pH regulatory apparatus in tumors must (i) provide adequate lactic acid permeability through membranes, (ii) facilitate CO2/HCO3−/H+ diffusivity across the interstitium, (iii) invest in a form of active transport that strikes a favorable balance between intracellular pH and intracellular lactate retention under the energetic constraints of a cell, and (iv) enable the necessary feedback to complete the homeostatic loop. A more informed and quantitative approach to understanding acid-handling in cancer is mandatory for identifying vulnerabilities, which could be exploited as therapeutic targets.
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Affiliation(s)
- Pawel Swietach
- Department of Physiology, Anatomy and Genetics, Parks Road, Oxford, OX1 3PT, England.
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14
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Abstract
Acidic metabolic waste products accumulate in the tumor microenvironment because of high metabolic activity and insufficient perfusion. In tumors, the acidity of the interstitial space and the relatively well-maintained intracellular pH influence cancer and stromal cell function, their mutual interplay, and their interactions with the extracellular matrix. Tumor pH is spatially and temporally heterogeneous, and the fitness advantage of cancer cells adapted to extracellular acidity is likely particularly evident when they encounter less acidic tumor regions, for instance, during invasion. Through complex effects on genetic stability, epigenetics, cellular metabolism, proliferation, and survival, the compartmentalized pH microenvironment favors cancer development. Cellular selection exacerbates the malignant phenotype, which is further enhanced by acid-induced cell motility, extracellular matrix degradation, attenuated immune responses, and modified cellular and intercellular signaling. In this review, we discuss how the acidity of the tumor microenvironment influences each stage in cancer development, from dysplasia to full-blown metastatic disease.
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Affiliation(s)
- Ebbe Boedtkjer
- Department of Biomedicine, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Stine F. Pedersen
- Department of Biology, University of Copenhagen, DK-2100 Copenhagen, Denmark
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15
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Chun JN, Cho M, Park S, So I, Jeon JH. The conflicting role of E2F1 in prostate cancer: A matter of cell context or interpretational flexibility? Biochim Biophys Acta Rev Cancer 2019; 1873:188336. [PMID: 31870703 DOI: 10.1016/j.bbcan.2019.188336] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 12/20/2019] [Indexed: 02/07/2023]
Abstract
The transcription factor E2F1 plays a crucial role in mediating multiple cancer hallmark capabilities that regulate cell cycle, survival, apoptosis, metabolism, and metastasis. Aberrant activation of E2F1 is closely associated with a poor clinical outcome in various human cancers. However, E2F1 has conflictingly been reported to exert tumor suppressive activity, raising a question as to the nature of its substantive role in the control of cell fate. In this review, we summarize deregulated E2F1 activity and its role in prostate cancer. We highlight the recent advances in understanding the molecular mechanism by which E2F1 regulates the development and progression of prostate cancer, providing insight into how cell context or data interpretation shapes the role of E2F1 in prostate cancer. This review will aid in translating biomedical knowledge into therapeutic strategies for prostate cancer.
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Affiliation(s)
- Jung Nyeo Chun
- Department of Physiology and Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, Republic of Korea; Institute of Human-Environment Interface Biology, Seoul National University, Seoul 03080, Republic of Korea
| | - Minsoo Cho
- Undergraduate Research Program, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Soonbum Park
- Department of Physiology and Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Insuk So
- Department of Physiology and Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, Republic of Korea; Institute of Human-Environment Interface Biology, Seoul National University, Seoul 03080, Republic of Korea
| | - Ju-Hong Jeon
- Department of Physiology and Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, Republic of Korea; Institute of Human-Environment Interface Biology, Seoul National University, Seoul 03080, Republic of Korea.
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16
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A Barter Economy in Tumors: Exchanging Metabolites through Gap Junctions. Cancers (Basel) 2019; 11:cancers11010117. [PMID: 30669506 PMCID: PMC6356692 DOI: 10.3390/cancers11010117] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 01/16/2019] [Accepted: 01/18/2019] [Indexed: 02/07/2023] Open
Abstract
To produce physiological functions, many tissues require their cells to be connected by gap junctions. Such diffusive coupling is important in establishing a cytoplasmic syncytium through which cells can exchange signals, substrates and metabolites. Often the benefits of connectivity become apparent solely at the multicellular level, leading to the notion that cells work for a common good rather than exclusively in their self-interest. In some tumors, gap junctional connectivity between cancer cells is reduced or absent, but there are notable cases where it persists or re-emerges in late-stage disease. Diffusive coupling will blur certain phenotypic differences between cells, which may seem to go against the establishment of population heterogeneity, a central pillar of cancer that stems from genetic instability. Here, building on our previous measurements of gap junctional coupling between cancer cells, we use a computational model to simulate the role of connexin-assembled channels in exchanging lactate and bicarbonate ions down their diffusion gradients. Based on the results of these simulations, we propose that an overriding benefit of gap junctional connectivity may relate to lactate/bicarbonate exchange, which would support an elevated metabolic rate in hypoxic tumors. In this example of barter, hypoxic cancer cells provide normoxic neighbors with lactate for mitochondrial oxidation; in exchange, bicarbonate ions, which are more plentiful in normoxic cells, are supplied to hypoxic neighbors to neutralize the H+ ions co-produced glycolytically. Both cells benefit, and so does the tumor.
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17
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Uthaman S, Huh KM, Park IK. Tumor microenvironment-responsive nanoparticles for cancer theragnostic applications. Biomater Res 2018; 22:22. [PMID: 30155269 PMCID: PMC6108142 DOI: 10.1186/s40824-018-0132-z] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Accepted: 08/02/2018] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Cancer is one of the deadliest threats to human health. Abnormal physiochemical conditions and dysregulated biosynthetic intermediates in the tumor microenvironment (TME) play a significant role in modulating cancer cells to evade or defend conventional anti-cancer therapy such as surgery, chemotherapy and radiotherapy. One of the most important challenges in the development of anti-tumor therapy is the successful delivery of therapeutic and imaging agents specifically to solid tumors. MAIN BODY The recent progresses in development of TME responsive nanoparticles offers promising strategies for combating cancer by making use of the common attributes of tumor such as acidic and hypoxic microenvironments. In this review, we discussed the prominent strategies utilized in the development of tumor microenvironment-responsive nanoparticles and mode of release of therapeutic cargo. CONCLUSION Tumor microenvironment-responsive nanoparticles offers a universal approach for anti-cancer therapy.
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Affiliation(s)
- Saji Uthaman
- Department of Polymer Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134 Republic of Korea
| | - Kang Moo Huh
- Department of Polymer Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134 Republic of Korea
| | - In-Kyu Park
- Department of Biomedical Sciences, BK21 PLUS Centre for Creative Biomedical Scientists, Chonnam National University Medical School, 160 Baekseo-ro, Gwangju, 61469 Republic of Korea
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18
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Russell S, Wojtkowiak J, Neilson A, Gillies RJ. Metabolic Profiling of healthy and cancerous tissues in 2D and 3D. Sci Rep 2017; 7:15285. [PMID: 29127321 PMCID: PMC5681543 DOI: 10.1038/s41598-017-15325-5] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 10/20/2017] [Indexed: 12/27/2022] Open
Abstract
Metabolism is a compartmentalized process, and it is apparent in studying cancer that tumors, like normal tissues, demonstrate metabolic cooperation between different cell types. Metabolic profiling of cells in 2D culture systems often fails to reflect the metabolism occurring within tissues in vivo due to lack of other cell types and 3D interaction. We designed a tooling and methodology to metabolically profile and compare 2D cultures with cancer cell spheroids, and microtissue slices from tumors, and normal organs. We observed differences in the basal metabolism of 2D and 3D cell cultures in response to metabolic inhibitors, and chemotherapeutics. The metabolic profiles of microtissues derived from normal organs (heart, kidney) were relatively consistent when comparing microtissues derived from the same organ. Treatment of heart and kidney microtissues with cardio- or nephro-toxins had early and marked effects on tissue metabolism. In contrast, microtissues derived from different regions of the same tumors exhibited significant metabolic heterogeneity, which correlated to histology. Hence, metabolic profiling of complex microtissues is necessary to understand the effects of metabolic co-operation and how this interaction, not only can be targeted for treatment, but this method can be used as a reproducible, early and sensitive measure of drug toxicity.
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Affiliation(s)
- Shonagh Russell
- Department of Cancer Imaging and Metabolism, H Lee Moffitt Cancer Centre and Research Institute, Tampa, FL, USA
- University of South Florida, Tampa, FL, USA
| | | | - Andy Neilson
- Agilent Technologies (Seahorse Bioscience), 5301 Stevens Creek Blvd., Santa Clara, CA, 95051, USA
| | - Robert J Gillies
- Department of Cancer Imaging and Metabolism, H Lee Moffitt Cancer Centre and Research Institute, Tampa, FL, USA.
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19
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Tsitovich PB, Cox JM, Spernyak JA, Morrow JR. Gear Up for a pH Shift: A Responsive Iron(II) 2-Amino-6-picolyl-Appended Macrocyclic paraCEST Agent That Protonates at a Pendent Group. Inorg Chem 2016; 55:12001-12010. [PMID: 27934305 DOI: 10.1021/acs.inorgchem.6b02159] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Two high-spin Fe(II) and Co(II) complexes of 1,4,7,10-tetraazacyclododecane (CYCLEN) appended with four 2-amino-6-picolyl groups, denoted as [Fe(TAPC)]2+ and [Co(TAPC)]2+, are reported. These complexes demonstrate C2-symmetrical geometry from coordination of two pendents, and they are present in a single diastereomeric form in aqueous solution as shown by 1H NMR spectroscopy and by a single-crystal X-ray structure for the Co(II) complex. A highly shifted but low-intensity CEST (chemical exchange saturation transfer) signal from NH groups is observed at -118 ppm for [Co(TAPC)]2+ at pH 6.0 and 37 °C. A higher intensity CEST peak is observed for [Fe(TAPC)]2+, which demonstrates a pH-dependent frequency shift from -72 to -79 ppm at pH 7.7 to 4.8, respectively, at 37 °C. This shift in the CEST peak correlates with the protonation of the unbound 2-amino-6-picolyl pendents, as suggested by UV-vis and 1H NMR spectroscopy studies at different pH values. Phantom imaging demonstrates the challenges and feasibility of using the [Fe(TAPC)]2+ agent on a low-field MRI scanner. The [Fe(TAPC)]2+ complex is the first transition-metal-based paraCEST agent that produces a pH-induced CEST frequency change toward the development of probes for concentration-independent imaging of pH.
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Affiliation(s)
- Pavel B Tsitovich
- Department of Chemistry, University at Buffalo, the State University of New York , Buffalo, New York 14260, United States
| | - Jordan M Cox
- Department of Chemistry, University at Buffalo, the State University of New York , Buffalo, New York 14260, United States
| | - Joseph A Spernyak
- Department of Cell Stress Biology, Roswell Park Cancer Institute , Buffalo, New York 14263, United States
| | - Janet R Morrow
- Department of Chemistry, University at Buffalo, the State University of New York , Buffalo, New York 14260, United States
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20
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Bobko AA, Evans J, Denko NC, Khramtsov VV. Concurrent Longitudinal EPR Monitoring of Tissue Oxygenation, Acidosis, and Reducing Capacity in Mouse Xenograft Tumor Models. Cell Biochem Biophys 2016; 75:247-253. [PMID: 27193607 DOI: 10.1007/s12013-016-0733-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 05/04/2016] [Indexed: 01/30/2023]
Abstract
Tissue oxygenation, extracellular acidity, and tissue reducing capacity are among crucial parameters of tumor microenvironment (TME) of significant importance for tumor pathophysiology. In this paper, we demonstrate the complementary application of particulate lithium octa-n-butoxy-naphthalocyanine and soluble nitroxide paramagnetic probes for monitoring of these TME parameters using electron paramagnetic resonance (EPR) technique. Two different types of therapeutic interventions were studied: hypothermia and systemic administration of metabolically active drug. In summary, the results demonstrate the utility of EPR technique for non-invasive concurrent longitudinal monitoring of physiologically relevant chemical parameters of TME in mouse xenograft tumor models, including that under therapeutic intervention.
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Affiliation(s)
- Andrey A Bobko
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Science Center, West Virginia University, Morgantown, WV, 26506, USA.,Department of Biochemistry, West Virginia University School of Medicine, Morgantown, WV, 26506, USA
| | - Jason Evans
- The James Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
| | - Nicholas C Denko
- The James Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
| | - Valery V Khramtsov
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Science Center, West Virginia University, Morgantown, WV, 26506, USA. .,Department of Biochemistry, West Virginia University School of Medicine, Morgantown, WV, 26506, USA.
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21
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Payen VL, Porporato PE, Baselet B, Sonveaux P. Metabolic changes associated with tumor metastasis, part 1: tumor pH, glycolysis and the pentose phosphate pathway. Cell Mol Life Sci 2016; 73:1333-48. [PMID: 26626411 PMCID: PMC11108399 DOI: 10.1007/s00018-015-2098-5] [Citation(s) in RCA: 150] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 11/16/2015] [Accepted: 11/19/2015] [Indexed: 12/16/2022]
Abstract
Metabolic adaptations are intimately associated with changes in cell behavior. Cancers are characterized by a high metabolic plasticity resulting from mutations and the selection of metabolic phenotypes conferring growth and invasive advantages. While metabolic plasticity allows cancer cells to cope with various microenvironmental situations that can be encountered in a primary tumor, there is increasing evidence that metabolism is also a major driver of cancer metastasis. Rather than a general switch promoting metastasis as a whole, a succession of metabolic adaptations is more likely needed to promote different steps of the metastatic process. This review addresses the contribution of pH, glycolysis and the pentose phosphate pathway, and a companion paper summarizes current knowledge regarding the contribution of mitochondria, lipids and amino acid metabolism. Extracellular acidification, intracellular alkalinization, the glycolytic enzyme phosphoglucose isomerase acting as an autocrine cytokine, lactate and the pentose phosphate pathway are emerging as important factors controlling cancer metastasis.
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Affiliation(s)
- Valéry L Payen
- Pole of Pharmacology, Institut de Recherche Expérimentale et Clinique (IREC), Université catholique de Louvain (UCL), Avenue Emmanuel Mounier 52, box B1.53.09, 1200, Brussels, Belgium
| | - Paolo E Porporato
- Pole of Pharmacology, Institut de Recherche Expérimentale et Clinique (IREC), Université catholique de Louvain (UCL), Avenue Emmanuel Mounier 52, box B1.53.09, 1200, Brussels, Belgium
| | - Bjorn Baselet
- Pole of Pharmacology, Institut de Recherche Expérimentale et Clinique (IREC), Université catholique de Louvain (UCL), Avenue Emmanuel Mounier 52, box B1.53.09, 1200, Brussels, Belgium
- Radiobiology Unit, Belgian Nuclear Research Centre, SCK∙CEN, 2400, Mol, Belgium
| | - Pierre Sonveaux
- Pole of Pharmacology, Institut de Recherche Expérimentale et Clinique (IREC), Université catholique de Louvain (UCL), Avenue Emmanuel Mounier 52, box B1.53.09, 1200, Brussels, Belgium.
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22
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Li C, Xu N, Li YQ, Wang Y, Zhu ZT. Inhibition of SW620 human colon cancer cells by upregulating miRNA-145. World J Gastroenterol 2016; 22:2771-2778. [PMID: 26973415 PMCID: PMC4777999 DOI: 10.3748/wjg.v22.i9.2771] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 08/31/2015] [Accepted: 12/01/2015] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the targeted inhibition of proliferation and migration of SW620 human colon cancer cells by upregulating miRNA-145 (miR-145).
METHODS: Forty-five samples of colon cancer tissues and 45 normal control samples were obtained from the biological database of the First Affiliated Hospital of Liaoning Medical University. We performed quantitative analysis of miR-145 and N-ras expression in tissues; reverse transcriptase polymerase chain reaction analysis of miR-145 expression in SW620 colon cancer cells and normal colonic epithelial cells; construction of miR-145 lentiviral vector and determination of miR-145 expression in SW620 cells transduced with miR-145 vector; analysis of the effect of miR-145 overexpression on SW620 cell proliferation; analysis of the effect of miR-145 overexpression on SW620 cell migration using a wound healing assay; and analysis of the effect of miR-145 on N-ras expression using Western blotting.
RESULTS: miR-145 expression was significantly downregulated in colon cancer tissues, with its expression in normal colonic tissues being 4-5-fold higher (two sample t test, P < 0.05), whereas N-ras expression showed the opposite trend. miR-145 expression in SW620 cells was downregulated, which was significantly lower compared to that in colonic epithelial cells (two sample t test, P < 0.05). miR-145 vector and control were successfully packaged; expression of miR-145 in SW620 cells transduced with miR-145 was 8.2-fold of that in control cells (two sample t test, P < 0.05). The proliferation of miR-145-transduced SW620 cells was significantly decreased compared to control cells (two sample t test, P < 0.05). At 48 h in the wound healing experiment, the migration indexes and controls were (97.27% ± 9.25%) and (70.22% ± 6.53%), respectively (two sample t test, P < 0.05). N-ras expression in miR-145-tranduced SW620 cells was significantly lower than others (one-way analysis of variance, P < 0.05).
CONCLUSION: miR-145 is important in inhibiting colon cancer cell proliferation and migration. This is a good foundation for development of colon cancer therapy by targeting tumor suppressor miR-145.
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23
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Wu M, Seto E, Zhang J. E2F1 enhances glycolysis through suppressing Sirt6 transcription in cancer cells. Oncotarget 2016; 6:11252-63. [PMID: 25816777 PMCID: PMC4484454 DOI: 10.18632/oncotarget.3594] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Accepted: 02/20/2015] [Indexed: 11/25/2022] Open
Abstract
The fast proliferation of cancer cells requires reprogramming of its energy metabolism with aerobic glycolysis as a major energy source. Sirt6, a class III histone deacetylase, has been shown to down regulate glycolysis by inhibiting the expression of several key glycolytic genes. Based on the published study on the metabolic phenotype of E2F1 −/− mice and SIRT6 −/− mice, we hypothesize that E2F1 enhances glycolysis and inhibits the expression of Sirt6. Indeed, over-expressing of E2F1, but not its DNA binding deficient mutant, significantly enhanced glucose uptake and lactate production in bladder and prostate cancer cell lines. E2F1 over-expression also suppressed Sirt6 expression and function. Moreover, E2F1 directly bound to Sirt6 promoter and suppressed Sirt6 promoter activity under both normoxic and hypoxic culture conditions. E2F1 siRNA blocked the up-regulation of E2F1 under hypoxia, increased Sirt6 expression and decreased glycolysis compared to those of scrambled siRNA transected cells. Furthermore, HDAC1 deacetylated E2F1 and diminished its transcription suppression of Sirt6 promoter. Treatment with the HDAC inhibitor, trichostatin A (TSA), suppressed Sirt6 promoter activity with increased binding of acetylated E2F1 to Sirt6 promoter. Mutating the E2F1 binding site on the proximal Sirt6 promoter abolished the suppression of Sirt6 transcription by TSA. These data indicate a novel oncogenic role of E2F1, i.e. enhancing glycolysis by suppressing Sirt6 transcription.
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Affiliation(s)
- Minghui Wu
- Department of Genitourinary Oncology and Department of Cancer Imaging and Metabolism, H Lee Moffitt Cancer Center, Tampa, FL, USA
| | - Edward Seto
- Department of Molecular Oncology, H Lee Moffitt Cancer Center, Tampa, FL, USA
| | - Jingsong Zhang
- Department of Genitourinary Oncology and Department of Cancer Imaging and Metabolism, H Lee Moffitt Cancer Center, Tampa, FL, USA
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24
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Pilon-Thomas S, Kodumudi KN, El-Kenawi AE, Russell S, Weber AM, Luddy K, Damaghi M, Wojtkowiak JW, Mulé JJ, Ibrahim-Hashim A, Gillies RJ. Neutralization of Tumor Acidity Improves Antitumor Responses to Immunotherapy. Cancer Res 2015; 76:1381-90. [PMID: 26719539 DOI: 10.1158/0008-5472.can-15-1743] [Citation(s) in RCA: 417] [Impact Index Per Article: 46.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 12/09/2015] [Indexed: 12/21/2022]
Abstract
Cancer immunotherapies, such as immune checkpoint blockade or adoptive T-cell transfer, can lead to durable responses in the clinic, but response rates remain low due to undefined suppression mechanisms. Solid tumors are characterized by a highly acidic microenvironment that might blunt the effectiveness of antitumor immunity. In this study, we directly investigated the effects of tumor acidity on the efficacy of immunotherapy. An acidic pH environment blocked T-cell activation and limited glycolysis in vitro. IFNγ release blocked by acidic pH did not occur at the level of steady-state mRNA, implying that the effect of acidity was posttranslational. Acidification did not affect cytoplasmic pH, suggesting that signals transduced by external acidity were likely mediated by specific acid-sensing receptors, four of which are expressed by T cells. Notably, neutralizing tumor acidity with bicarbonate monotherapy impaired the growth of some cancer types in mice where it was associated with increased T-cell infiltration. Furthermore, combining bicarbonate therapy with anti-CTLA-4, anti-PD1, or adoptive T-cell transfer improved antitumor responses in multiple models, including cures in some subjects. Overall, our findings show how raising intratumoral pH through oral buffers therapy can improve responses to immunotherapy, with the potential for immediate clinical translation.
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Affiliation(s)
- Shari Pilon-Thomas
- Department of Immunology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
| | - Krithika N Kodumudi
- Department of Immunology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
| | - Asmaa E El-Kenawi
- Department of Cancer Imaging and Metabolism, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida. Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Shonagh Russell
- Department of Cancer Imaging and Metabolism, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
| | - Amy M Weber
- Department of Immunology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
| | - Kimberly Luddy
- Department of Cancer Imaging and Metabolism, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
| | - Mehdi Damaghi
- Department of Cancer Imaging and Metabolism, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
| | - Jonathan W Wojtkowiak
- Department of Cancer Imaging and Metabolism, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
| | - James J Mulé
- Department of Immunology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
| | - Arig Ibrahim-Hashim
- Department of Cancer Imaging and Metabolism, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
| | - Robert J Gillies
- Department of Cancer Imaging and Metabolism, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida.
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25
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Mookerjee SA, Goncalves RLS, Gerencser AA, Nicholls DG, Brand MD. The contributions of respiration and glycolysis to extracellular acid production. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2014; 1847:171-181. [PMID: 25449966 DOI: 10.1016/j.bbabio.2014.10.005] [Citation(s) in RCA: 243] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 10/20/2014] [Accepted: 10/22/2014] [Indexed: 12/13/2022]
Abstract
BACKGROUND The rate at which cells acidify the extracellular medium is frequently used to report glycolytic rate, with the implicit assumption that conversion of uncharged glucose or glycogen to lactate(-)+H(+) is the only significant source of acidification. However, another potential source of extracellular protons is the production of CO2 during substrate oxidation: CO2 is hydrated to H2CO3, which then dissociates to HCO3(-)+H(+). METHODS O2 consumption and pH were monitored in a popular platform for measuring extracellular acidification (the Seahorse XF Analyzer). RESULTS We found that CO2 produced during respiration caused almost stoichiometric release of H(+) into the medium. With C2C12 myoblasts given glucose, respiration-derived CO2 contributed 34% of the total extracellular acidification. When glucose was omitted or replaced by palmitate or pyruvate, this value was 67-100%. Analysis of primary cells, cancer cell lines, stem cell lines, and isolated synaptosomes revealed contributions of CO2-produced acidification that were usually substantial, ranging from 3% to 100% of the total acidification rate. CONCLUSION Measurement of glycolytic rate using extracellular acidification requires differentiation between respiratory and glycolytic acid production. GENERAL SIGNIFICANCE The data presented here demonstrate the importance of this correction when extracellular acidification is used for quantitative measurement of glycolytic flux to lactate. We describe a simple way to correct the measured extracellular acidification rate for respiratory acid production, using simultaneous measurement of oxygen consumption rate. SUMMARY STATEMENT Extracellular acidification is often assumed to result solely from glycolytic lactate production, but respiratory CO2 also contributes. We demonstrate that extracellular acidification by myoblasts given glucose is 66% glycolytic and 34% respiratory and describe a method to differentiate these sources.
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Affiliation(s)
- Shona A Mookerjee
- College of Pharmacy, Touro University California, 1310 Club Drive, Vallejo, CA 94592, USA; Buck Institute for Research on Aging, 8001 Redwood Blvd, Novato, CA 94945, USA.
| | | | - Akos A Gerencser
- College of Pharmacy, Touro University California, 1310 Club Drive, Vallejo, CA 94592, USA; Buck Institute for Research on Aging, 8001 Redwood Blvd, Novato, CA 94945, USA
| | - David G Nicholls
- Buck Institute for Research on Aging, 8001 Redwood Blvd, Novato, CA 94945, USA
| | - Martin D Brand
- College of Pharmacy, Touro University California, 1310 Club Drive, Vallejo, CA 94592, USA; Buck Institute for Research on Aging, 8001 Redwood Blvd, Novato, CA 94945, USA
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