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Singla S, Jena G. Studies on the mechanism of local and extra-intestinal tissue manifestations in AOM-DSS-induced carcinogenesis in BALB/c mice: role of PARP-1, NLRP3, and autophagy. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024; 397:4321-4337. [PMID: 38091080 DOI: 10.1007/s00210-023-02878-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 11/28/2023] [Indexed: 05/23/2024]
Abstract
Colitis-associated colorectal cancer (CACC) is one of the devastating complications of long-term inflammatory bowel disease and is associated with substantial morbidity and mortality. Combination of azoxymethane (AOM) and dextran sulfate sodium (DSS) has been extensively used for inflammation-mediated colon tumor development due to its reproducibility, potency, histological and molecular changes, and resemblance to human CACC. In the tumor microenvironment and extra-intestinal tissues, PARP-1, NLRP3 inflammasome, and autophagy's biological functions are complicated and encompass intricate interactions between these molecular components. The focus of the present investigation is to determine the colonic and extra-intestinal tissue damage induced by AOM-DSS and related molecular mechanisms. Azoxymethane (10 mg/kg, i.p.; single injection) followed by DSS (3 cycles, 7 days per cycle) over a period of 10 weeks induced colitis-associated colon cancer in male BALB/c mice. By initiating carcinogenesis with a single injection of azoxymethane (AOM) and then establishing inflammation with dextran sulfate sodium (DSS), a two-stage murine model for CACC was developed. Biochemical parameters, ELISA, histopathological and immunohistochemical analysis, and western blotting have been performed to evaluate the colonic, hepatic, testicular and pancreatic damage. In addition, the AOM/DSS-induced damage has been assessed by analyzing the expression of a variety of molecular targets, including proliferating cell nuclear antigen (PCNA), interleukin-10 (IL-10), AMP-activated protein kinase (AMPK), poly (ADP-ribose) polymerase-1 (PARP-1), cysteine-associated protein kinase-1 (caspase-1), NLR family pyrin domain containing 3 (NLRP3), beclin-1, and interleukin-1β (IL-1β). Present findings revealed that AOM/DSS developed tumors in colon tissue followed by extra-intestinal hepatic, testicular, and pancreatic damages.
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Affiliation(s)
- Shivani Singla
- Facility for Risk Assessment and Intervention Studies, Dept. of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, S.A.S, Nagar, Punjab, 160062, India
| | - Gopabandhu Jena
- Facility for Risk Assessment and Intervention Studies, Dept. of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, S.A.S, Nagar, Punjab, 160062, India.
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2
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Neto Í, Rocha J, Gaspar MM, Reis CP. Experimental Murine Models for Colorectal Cancer Research. Cancers (Basel) 2023; 15:cancers15092570. [PMID: 37174036 PMCID: PMC10177088 DOI: 10.3390/cancers15092570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/25/2023] [Accepted: 04/26/2023] [Indexed: 05/15/2023] Open
Abstract
Colorectal cancer (CRC) is the third most prevalent malignancy worldwide and in both sexes. Numerous animal models for CRC have been established to study its biology, namely carcinogen-induced models (CIMs) and genetically engineered mouse models (GEMMs). CIMs are valuable for assessing colitis-related carcinogenesis and studying chemoprevention. On the other hand, CRC GEMMs have proven to be useful for evaluating the tumor microenvironment and systemic immune responses, which have contributed to the discovery of novel therapeutic approaches. Although metastatic disease can be induced by orthotopic injection of CRC cell lines, the resulting models are not representative of the full genetic diversity of the disease due to the limited number of cell lines suitable for this purpose. On the other hand, patient-derived xenografts (PDX) are the most reliable for preclinical drug development due to their ability to retain pathological and molecular characteristics. In this review, the authors discuss the various murine CRC models with a focus on their clinical relevance, benefits, and drawbacks. From all models discussed, murine CRC models will continue to be an important tool in advancing our understanding and treatment of this disease, but additional research is required to find a model that can correctly reflect the pathophysiology of CRC.
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Affiliation(s)
- Íris Neto
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - João Rocha
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Maria Manuela Gaspar
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Catarina P Reis
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
- Instituto de Biofísica e Engenharia Biomédica (IBEB), Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
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3
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Garzoli S, Alarcón-Zapata P, Seitimova G, Alarcón-Zapata B, Martorell M, Sharopov F, Fokou PVT, Dize D, Yamthe LRT, Les F, Cásedas G, López V, Iriti M, Rad JS, Gürer ES, Calina D, Pezzani R, Vitalini S. Natural essential oils as a new therapeutic tool in colorectal cancer. Cancer Cell Int 2022; 22:407. [PMID: 36514100 PMCID: PMC9749237 DOI: 10.1186/s12935-022-02806-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 11/24/2022] [Indexed: 12/15/2022] Open
Abstract
Colorectal cancer (CRC) is the third most revalent type of cancer in the world and the second most common cause of cancer death (about 1 million per year). Historically, natural compounds and their structural analogues have contributed to the development of new drugs useful in the treatment of various diseases, including cancer. Essential oils are natural odorous products made up of a complex mixture of low molecular weight compounds with recognized biological and pharmacological properties investigated also for the prevention and treatment of cancer. The aim of this paper is to highlight the possible role of essential oils in CRC, their composition and the preclinical studies involving them. It has been reviewed the preclinical pharmacological studies to determine the experimental models used and the anticancer potential mechanisms of action of natural essential oils in CRC. Searches were performed in the following databases PubMed/Medline, Web of science, TRIP database, Scopus, Google Scholar using appropriate MeSH terms. The results of analyzed studies showed that EOs exhibited a wide range of bioactive effects like cytotoxicity, antiproliferative, and antimetastatic effects on cancer cells through various mechanisms of action. This updated review provides a better quality of scientific evidence for the efficacy of EOs as chemotherapeutic/chemopreventive agents in CRC. Future translational clinical studies are needed to establish the effective dose in humans as well as the most suitable route of administration for maximum bioavailability and efficacy. Given the positive anticancer results obtained from preclinical pharmacological studies, EOs can be considered efficient complementary therapies in chemotherapy in CRC.
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Affiliation(s)
- Stefania Garzoli
- grid.7841.aDepartment of Drug Chemistry and Technologies, University “Sapienza” of Rome, P.Le Aldo Moro 5, 00185 Rome, Italy
| | - Pedro Alarcón-Zapata
- grid.5380.e0000 0001 2298 9663Clinical Biochemistry and Immunology Department, Faculty of Pharmacy, University of Concepción, Concepción, VIII – Bio Bio Region Chile ,grid.442215.40000 0001 2227 4297Facultad de Ciencias de La Salud, Universidad San Sebastián, Lientur 1457, 4080871 Concepción, Chile
| | - Gulnaz Seitimova
- grid.77184.3d0000 0000 8887 5266Faculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, Almaty, Kazakhstan
| | - Barbara Alarcón-Zapata
- grid.5380.e0000 0001 2298 9663Clinical Biochemistry and Immunology Department, Faculty of Pharmacy, University of Concepción, Concepción, VIII – Bio Bio Region Chile
| | - Miquel Martorell
- grid.5380.e0000 0001 2298 9663Department of Nutrition and Dietetics, Faculty of Pharmacy, and Centre for Healthy Living, University of Concepción, 4070386 Concepción, Chile
| | - Farukh Sharopov
- grid.469891.b0000 0001 1702 746XResearch Institution “Chinese-Tajik Innovation Center for Natural Products”, National Academy of Sciences of the Republic of Tajikistan, Ayni 299/2, Dushanbe, 734063 Tajikistan
| | - Patrick Valere Tsouh Fokou
- grid.449799.e0000 0004 4684 0857Department of Biochemistry, Faculty of Science, University of Bamenda, Bambili, 39 Cameroon
| | - Darline Dize
- grid.412661.60000 0001 2173 8504Antimicrobial and Biocontrol Agents Unit, Department of Biochemistry, Faculty of Science, University of Yaounde 1, Ngoa Ekelle, Yaounde, 812 Cameroon
| | | | - Francisco Les
- grid.440816.f0000 0004 1762 4960Department of Pharmacy, Faculty of Health Sciences, Universidad San Jorge, 50830 Villanueva de Gállego (Saragossa), Spain ,grid.11205.370000 0001 2152 8769Instituto Agroalimentario de Aragón-IA2 (CITA-Universidad de Zaragoza), 50059 Saragossa, Spain
| | - Guillermo Cásedas
- grid.440816.f0000 0004 1762 4960Department of Pharmacy, Faculty of Health Sciences, Universidad San Jorge, 50830 Villanueva de Gállego (Saragossa), Spain
| | - Víctor López
- grid.440816.f0000 0004 1762 4960Department of Pharmacy, Faculty of Health Sciences, Universidad San Jorge, 50830 Villanueva de Gállego (Saragossa), Spain ,grid.11205.370000 0001 2152 8769Instituto Agroalimentario de Aragón-IA2 (CITA-Universidad de Zaragoza), 50059 Saragossa, Spain
| | - Marcello Iriti
- grid.4708.b0000 0004 1757 2822Department of Biomedical, Surgical and Dental Sciences, Università Degli Studi di Milano, Via G. Pascal 36, 20133 Milan, Italy
| | - Javad Sharifi Rad
- grid.442126.70000 0001 1945 2902Facultad de Medicina, Universidad del Azuay, Cuenca, Ecuador
| | - Eda Sönmez Gürer
- grid.411689.30000 0001 2259 4311Faculty of Pharmacy, Department of Pharmacognosy, Sivas Cumhuriyet University, Sivas, Turkey
| | - Daniela Calina
- grid.413055.60000 0004 0384 6757Department of Clinical Pharmacy, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Raffaele Pezzani
- grid.5608.b0000 0004 1757 3470Phytotherapy Lab (PhT-Lab), Endocrinology Unit, Department of Medicine (DIMED), University of Padova, Via Ospedale 105, 35128 Padua, Italy ,AIROB, Associazione Italiana Per la Ricerca Oncologica Di Base, Padua, Italy
| | - Sara Vitalini
- grid.4708.b0000 0004 1757 2822Department of Agricultural and Environmental Sciences, Università Degli Studi di Milano, Via G. Celoria 2, 20133 Milan, Italy
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Role of a mixed probiotic product, VSL#3, in the prevention and treatment of colorectal cancer. Eur J Pharmacol 2022; 930:175152. [PMID: 35835181 DOI: 10.1016/j.ejphar.2022.175152] [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: 05/19/2022] [Revised: 07/03/2022] [Accepted: 07/07/2022] [Indexed: 12/09/2022]
Abstract
Colorectal cancer (CRC) is a multifactorial disease. The incidence of this type of cancer in younger patients has increased in recent years, and more strategies are needed to prevent and delay the progression of CRC. Probiotics play an adjunctive role in the prevention and treatment of CRC and can not only prevent the onset and delay the progression of disease but also reduce the side effects after the application of anti-cancer drugs. The anti-cancer effect of individual probiotics has been extensively studied, and the exact curative effect of various probiotics has been found, but the anti-cancer effect of mixed probiotics is still not well summarized. In this review, we discuss the positive effects of mixed probiotics on CRC and the related mechanisms of action, especially VSL#3 (VSL Pharmaceuticals, Inc., Gaithersburg, MD, USA), thus providing new ideas for the treatment of CRC. Moreover, we suggest the need to search for more therapeutic possibilities, especially via the research and application of synbiotics and postbiotics.
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5
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Yarla NS, Madka V, Pathuri G, Rao CV. Molecular Targets in Precision Chemoprevention of Colorectal Cancer: An Update from Pre-Clinical to Clinical Trials. Int J Mol Sci 2020; 21:ijms21249609. [PMID: 33348563 PMCID: PMC7765969 DOI: 10.3390/ijms21249609] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 12/07/2020] [Accepted: 12/13/2020] [Indexed: 12/19/2022] Open
Abstract
Colorectal cancer (CRC) is one of the leading causes of cancer deaths worldwide. The initiation and progression of CRC is a multi-step process that proceeds via precursor lesions to carcinoma, with each stage characterized by its distinct molecular and tissue microenvironment changes. Precursor lesions of CRC, aberrant crypt foci, and adenoma exhibit drastic changes in genetic, transcriptomic, and proteomic profiles compared to normal tissue. The identification of these changes is essential and provides further validation as an initiator or promoter of CRC and, more so, as lesion-specific druggable molecular targets for the precision chemoprevention of CRC. Mutated/dysregulated signaling (adenomatous polyposis coli, β-catenin, epidermal growth factor receptor, V-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog (KRAS), tumor protein53, Akt, etc.), inflammatory (cyclooxygenase-2, microsomal prostaglandin E synthase-1, inducible nitric oxide synthase, and other pro-inflammatory mediators), and metabolic/growth factor (fatty acid synthase, β-Hydroxy β-methylglutaryl-CoA reductase, and ornithine decarboxylase) related targets are some of the well-characterized molecular targets in the precision chemoprevention of CRC. In this review, we discuss precursor-lesion specific targets of CRC and the current status of pre-clinical studies regarding clinical interventions and combinations for better efficacy and safety toward future precision clinical chemoprevention. In addition, we provide a brief discussion on the usefulness of secondary precision chemopreventive targets for tertiary precision chemoprevention to improve the disease-free and overall survival of advanced stage CRC patients.
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Affiliation(s)
- Nagendra S. Yarla
- Center for Cancer Prevention and Drug Development, Medical Oncology, Department of Medicine, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (N.S.Y.); (V.M.); (G.P.)
| | - Venkateshwar Madka
- Center for Cancer Prevention and Drug Development, Medical Oncology, Department of Medicine, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (N.S.Y.); (V.M.); (G.P.)
| | - Gopal Pathuri
- Center for Cancer Prevention and Drug Development, Medical Oncology, Department of Medicine, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (N.S.Y.); (V.M.); (G.P.)
| | - Chinthalapally V. Rao
- Center for Cancer Prevention and Drug Development, Medical Oncology, Department of Medicine, Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (N.S.Y.); (V.M.); (G.P.)
- VA Medical Center, Oklahoma City, OK 73104, USA
- Correspondence: ; Tel.: +1-405-271-3224; Fax: +1-405-271-3225
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6
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Establishment of an Endoscopy-Guided Minimally Invasive Orthotopic Mouse Model of Colorectal Cancer. Cancers (Basel) 2020; 12:cancers12103007. [PMID: 33081354 PMCID: PMC7650778 DOI: 10.3390/cancers12103007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 10/12/2020] [Accepted: 10/15/2020] [Indexed: 02/08/2023] Open
Abstract
Simple Summary Open orthotopic mouse models of colorectal cancer have disadvantages such as the requirement for advanced surgical skills or the trauma caused by laparotomy. To overcome these limitations, this study aimed to evaluate the establishment of an endoscopy-guided minimally invasive model without laparotomy. Different concentrations of the murine CRC cell lines CT26 and MC38 were endoscopically injected into the colorectal wall of BALB/C and C57BL/6J mice, respectively. Consistent tumor growth with the presence of tumor-infiltrating lymphocytes, lympho-vascular invasion, and early spontaneous lymph node, peritoneal, and hepatic metastases were observed. Analysis of the learning curve demonstrated that this model is easy to learn and quick to establish. It enables intra-individual follow-up endoscopies, and features tumors to study mechanisms of metastasis and the interaction with the immune system. The application of specific cell lines and concentrations enables a controlled local tumor growth and metastatic formation within short observation periods. Abstract Open orthotopic mouse models of colorectal cancer have disadvantages such as the requirement for advanced surgical skills or the trauma caused by laparotomy. To overcome these drawbacks, this study aimed to evaluate the establishment of a minimally invasive model using murine colonoscopy. CT26 and MC38 CRC cells of different concentrations were injected into BALB/C and C57BL/6J mice, respectively. Follow-up endoscopies were performed to assign an endoscopic score to tumor growth. Gross autopsy, histologic and immuno-histochemical evaluation, and immune scoring were performed. To describe the learning curve of the procedures, a performance score was given. Local tumor growth with colorectal wall infiltration, luminal ulceration, the presence of tumor-infiltrating lymphocytes, lympho-vascular invasion, and early spontaneous lymph node, peritoneal, and hepatic metastases were observed. The tumors showed cytoplasmic immuno-staining for CK20. Compared to the MC38/C57BL/6J model, tumorigenicity and immunogenicity of the CT26/BALB/C model were higher. Tumor volume correlated with the endoscopic score. This endoscopy-guided orthotopic mouse model is easy to learn and quick to establish. It features early metastasis and enables the study of interactions with the immune system. When specific cell concentrations and cell lines are applied, controlled local tumor growth and metastasis can be achieved within short observation periods.
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Ghazizadeh Darband S, Saboory E, Sadighparvar S, Kaviani M, Mobaraki K, Jabbari N, Majidinia M. The modulatory effects of exercise on the inflammatory and apoptotic markers in rats with 1,2-dimethylhydrazine-induced colorectal cancer. Can J Physiol Pharmacol 2019; 98:147-155. [PMID: 31614098 DOI: 10.1139/cjpp-2019-0329] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This study aimed to investigate the underlying mechanisms in anti-tumorigenesis effects of exercise through evaluation of inflammation and apoptosis. Twenty-four Wistar rats were divided into control, exercise, 1,2-dimethylhydrazine (DMH), and DMH + exercise. After a week, rats in the DMH group were given DMH twice a week for 2 weeks. Animals in the exercise groups performed exercise on a treadmill 5 days/week for 8 weeks. After 8 weeks of training, levels of COX-2, PCNA, Bax, Bcl-2, and procaspase-3/cleaved caspase-3 were assessed. Histological changes, number of aberrant crypt foci (ACF), and serum levels of TNF-α and IL-6 were also analyzed. ACF number was significantly decreased following the exercise program. Protein levels of COX-2 and PCNA and serum levels of IL-6 and TNF-α were significantly elevated in the rats receiving DMH and downregulated after performing the exercise program (P < 0.05). Exercise upregulated apoptosis, which was evident from the increased Bax/Bcl2 ratio, and enhanced the expression levels of activated caspase-3 as compared to the DMH group. The colonic architecture was improved in DMH + exercise. Exercise can effectively attenuate DMH-induced increase of inflammatory markers. Exercise induces apoptosis at the downstream of the inflammatory response. Therefore, exercise may play a role as a moderator of inflammation to exert protective effects against colon cancer.
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Affiliation(s)
| | - Ehsan Saboory
- Zanjan Metabolic Diseases Research Center, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Shirin Sadighparvar
- Neurophysiology Research Center, Urmia University of Medical Sciences, Urmia, Iran
| | - Mojtaba Kaviani
- School of Nutrition and Dietetics, Acadia University, Wolfville, NS B4P 2R6, Canada
| | - Kazhal Mobaraki
- Solid Tumor Research Center, Urmia University of Medical Sciences, Urmia, Iran
| | - Nasrollah Jabbari
- Solid Tumor Research Center, Urmia University of Medical Sciences, Urmia, Iran
| | - Maryam Majidinia
- Solid Tumor Research Center, Urmia University of Medical Sciences, Urmia, Iran
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Martín MJ, Gigola G, Zwenger A, Carriquiriborde M, Gentil F, Gentili C. Potential therapeutic targets for growth arrest of colorectal cancer cells exposed to PTHrP. Mol Cell Endocrinol 2018; 478:32-44. [PMID: 30009852 DOI: 10.1016/j.mce.2018.07.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 06/25/2018] [Accepted: 07/12/2018] [Indexed: 02/06/2023]
Abstract
Although PTHrP is implicated in several cancers, its role in chemoresistance is not fully elucidated. We found that in CRC cells, PTHrP exerts proliferative and protective effects and induces cell migration. The aim of this work was to further study the effects of PTHrP in CRC cells. Herein we evidenced, for the first time, that PTHrP induces resistance to CPT-11 in Caco-2 and HCT116 cells; although both cell lines responded to the drug through different molecular mechanisms, the chemoresistance by PTHrP in these models is mediated through ERK, which in turn is activated by PCK, Src and Akt. Moreover, continue administration of PTHrP in nude mice xenografts increased the protein levels of this MAPK and of other markers related to tumorigenic events. The understanding of the molecular mechanisms leading to ERK 1/2 activation and the study of ERK targets may facilitate the development of new therapeutic strategies for CRC treatment.
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Affiliation(s)
- María Julia Martín
- Instituto de Ciencias Biológicas y Biomédicas del Sur (INBIOSUR), Dept. Biología Bioquímica y Farmacia, Universidad Nacional del Sur-CONICET, Bahía Blanca, Argentina
| | - Graciela Gigola
- Dept. Biología Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Ariel Zwenger
- Dept. de Oncología, Hospital Provincial de Neuquén, Neuquén, Argentina
| | | | - Florencia Gentil
- Fac. de Cs. Veterinarias, Universidad Nacional de La Plata, La Plata, Argentina
| | - Claudia Gentili
- Instituto de Ciencias Biológicas y Biomédicas del Sur (INBIOSUR), Dept. Biología Bioquímica y Farmacia, Universidad Nacional del Sur-CONICET, Bahía Blanca, Argentina.
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9
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The Dynamic Changes of Gut Microbiota in Muc2 Deficient Mice. Int J Mol Sci 2018; 19:ijms19092809. [PMID: 30231491 PMCID: PMC6164417 DOI: 10.3390/ijms19092809] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 09/11/2018] [Accepted: 09/12/2018] [Indexed: 12/26/2022] Open
Abstract
Gut dysbiosis is associated with colitis-associated colorectal carcinogenesis, and the genetic deficiency of the Muc2 gene causes spontaneous development of colitis and colorectal cancer. Whether there are changes of gut microbiota and a linkage between the changes of microbiota and intestinal pathology in Muc2-/- mice are unclear. Muc2-/- and Muc2+/+ mice were generated by backcrossing from Muc2+/- mice, and the fecal samples were collected at different dates (48th, 98th, 118th, 138th, and 178th day). Gut microbiota were analyzed by high-throughput sequencing with the universal 16S rRNA primers (V3⁻V5 region). All mice were sacrificed at day 178 to collect colonic tissue and epithelial cells for the analysis of histopathology and inflammatory cytokines. On the 178th day, Muc2-/- mice developed colorectal chronic colitis, hyperplasia, adenomas and adenocarcinomas, and inflammatory cytokines (e.g., cyclooxygenase 2 (COX-2), interleukin 6 (IL-6), tumor necrosis factor-α (TNF-α), interleukin 1 β (IL-1β), i-kappa-B-kinase β (IKKβ)) were significantly increased in colonic epithelial cells of Muc2-/- mice. In general, structural segregation of gut microbiota was observed throughout the experimental time points between the Muc2-/- and Muc2+/+ mice. Impressively, in Muc2-/- mice, Alpha diversities reflected by Shannon and Chao indexes were higher, the phylum of Firmicutes was enriched and Bacteroidetes was decreased, and Desulfovibrio, Escherichia, Akkermansia, Turicibacter, and Erysipelotrichaceae were significantly increased, but Lactobacilli and Lachnospiraceae were significantly decreased. Moreover, the abundance of Ruminococcaceae and butyrate-producing bacteria was significantly higher in the Muc2-/- mice. There were significant differences of gut microbiota between Muc2-/- and Muc2+/+ mice. The dynamic changes of microbiota might contribute to the development of colitis and colitis-associated colorectal carcinogenesis. Therefore, this study revealed specific functional bacteria in the development of colitis and colitis-associated colorectal carcinogenesis, which will benefit the development of preventive and therapeutic strategies for chronic inflammation and its malignant transformation.
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10
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Lwin TM, Hoffman RM, Bouvet M. Advantages of patient-derived orthotopic mouse models and genetic reporters for developing fluorescence-guided surgery. J Surg Oncol 2018; 118:253-264. [PMID: 30080930 PMCID: PMC6146062 DOI: 10.1002/jso.25150] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 06/04/2018] [Indexed: 12/16/2022]
Abstract
Fluorescence-guided surgery can enhance the surgeon's ability to achieve a complete oncologic resection. There are a number of tumor-specific probes being developed with many preclinical mouse models to evaluate their efficacy. The current review discusses the different preclinical mouse models in the setting of probe evaluation and highlights the advantages of patient-derived orthotopic xenografts (PDOX) mouse models and genetic reporters to develop fluorescence-guided surgery.
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Affiliation(s)
- Thinzar M. Lwin
- Department of Surgery, University of California San Diego, San Diego, CA
| | - Robert M. Hoffman
- Department of Surgery, University of California San Diego, San Diego, CA
- AntiCancer, Inc., San Diego, CA
| | - Michael Bouvet
- Department of Surgery, University of California San Diego, San Diego, CA
- Department of Surgery, VA Medical Center, San Diego, CA
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11
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Kaur K, Saxena A, Debnath I, O'Brien JL, Ajami NJ, Auchtung TA, Petrosino JF, Sougiannis AJ, Depaep S, Chumanevich A, Gummadidala PM, Omebeyinje MH, Banerjee S, Chatzistamou I, Chakraborty P, Fayad R, Berger FG, Carson JA, Chanda A. Antibiotic-mediated bacteriome depletion in Apc Min/+ mice is associated with reduction in mucus-producing goblet cells and increased colorectal cancer progression. Cancer Med 2018; 7:2003-2012. [PMID: 29624892 PMCID: PMC5943478 DOI: 10.1002/cam4.1460] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 02/15/2018] [Accepted: 02/28/2018] [Indexed: 12/19/2022] Open
Abstract
Recent epidemiological evidence suggests that exposure to antibiotics in early‐to‐middle adulthood is associated with an increased risk of colorectal adenoma. However, mechanistic studies in established preclinical cancer to examine these claims are extremely limited. Therefore, we investigated the effect of long‐term exposure of an antibiotic cocktail composed of Vancomycin, Neomycin, and Streptomycin, on tumor development and progression in the ApcMin/+ mouse, an established genetic model for familial adenomatous polyposis. Clinical pathologies related to tumor development as well as intestinal and colon tissue histopathology were studied at ages 8, 12, and 16 weeks of age, which correspond to the approximate ages of development of neoplasia, gut inflammation with polyposis, and cancer progression, respectively, in this animal model. We show that the antibiotics significantly increase the severity of clinical symptoms, including effects on intestinal histology and goblet cell numbers. In addition, they promote small intestinal polyposis. Finally, metagenomic analysis of fecal samples demonstrated that antibiotic exposure is associated with a significant but nonuniform depletion of the animal's natural gut flora. Overall, these findings support the premise that long‐term antibiotic exposure mediates the selected depletion of gut microbial communities and the concomitant thinning of the protective mucus layer, resulting in an increase in tumor development.
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Affiliation(s)
- Kamaljeet Kaur
- Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina
| | - Arpit Saxena
- Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina
| | - Irina Debnath
- Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina
| | - Jacqueline L O'Brien
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas
| | - Nadim J Ajami
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas
| | - Thomas A Auchtung
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas
| | - Joseph F Petrosino
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas
| | | | - Sarah Depaep
- Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina
| | - Alexander Chumanevich
- Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina
| | - Phani M Gummadidala
- Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina
| | - Mayomi H Omebeyinje
- Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina
| | - Sourav Banerjee
- Mechanical Engineering, University of South Carolina, Columbia, South Carolina
| | - Ioulia Chatzistamou
- Pathology, Microbiology& Immunology, School of Medicine, University of South Carolina, Columbia, South Carolina
| | - Paramita Chakraborty
- Department of Statistics, University of South Carolina, Columbia, South Carolina
| | - Raja Fayad
- Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina.,Center for Colon Cancer Research, University of South Carolina, Columbia, South Carolina
| | - Franklin G Berger
- Center for Colon Cancer Research, University of South Carolina, Columbia, South Carolina
| | - James A Carson
- Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina.,Center for Colon Cancer Research, University of South Carolina, Columbia, South Carolina
| | - Anindya Chanda
- Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina.,Center for Colon Cancer Research, University of South Carolina, Columbia, South Carolina
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12
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Phaseolus acutifolius Lectin Fractions Exhibit Apoptotic Effects on Colon Cancer: Preclinical Studies Using Dimethilhydrazine or Azoxi-Methane as Cancer Induction Agents. Molecules 2017; 22:molecules22101670. [PMID: 28991196 PMCID: PMC6151564 DOI: 10.3390/molecules22101670] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 09/28/2017] [Accepted: 09/28/2017] [Indexed: 01/08/2023] Open
Abstract
Phaseolus acutifolius (Tepary bean) lectins have been studied as cytotoxic molecules on colon cancer cells. The toxicological profile of a Tepary bean lectin fraction (TBLF) has shown low toxicity in experimental animals; exhibiting anti-nutritional effects such as a reduction in body weight gain and a decrease in food intake when using a dose of 50 mg/kg on alternate days for six weeks. Taking this information into account, the focus of this work was to evaluate the effect of the TBLF on colon cancer using 1,2-dimethylhydrazine (DMH) or azoxy-methane/dextran sodium sulfate (AOM/DSS) as colon cancer inductors. Rats were treated with DMH or AOM/DSS and then administered with TBFL (50 mg/kg) for six weeks. TBLF significantly decreased early tumorigenesis triggered by DMH by 70%, but without any evidence of an apoptotic effect. In an independent experiment, AOM/DSS was used to generate aberrant cryptic foci, which decreased by 50% after TBLF treatment. TBLF exhibited antiproliferative and proapoptotic effects related to a decrease of the signal transduction pathway protein Akt in its activated form and an increase of caspase 3 activity, but not to p53 activation. Further studies will deepen our knowledge of specific apoptosis pathways and cellular stress processes such as oxidative damage.
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13
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Strazza M, Mor A. Consider the chemokines: a review of the interplay between chemokines and T cell subset function. DISCOVERY MEDICINE 2017; 24:31-39. [PMID: 28950073 PMCID: PMC8266128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Subsets of T cells can be classified by the functions executed or by the anatomic location at which they operate. In vitro analysis of T cell subsets and even commercial kits for subset separation often incorporate chemokine receptors into the panel of markers to distinguish among them, but what is the functional significance of these receptors? In this review, we discuss chemokine receptors that are expressed exclusively on different T cell subsets as well as those that are commonly expressed across subsets with the goal of linking receptor expression to cellular localization and intended cellular function. By understanding the chemokine network, we can better predict T cell migration and the immune reactivity of a given tissue environment. This is of particular importance for the chemokine expression patterns of solid tumor microenvironments as it relates to T cell infiltration. A successful immunotherapeutic strategy needs to incorporate not only the activation state of cytotoxic T cells but also the likelihood that these cells come into contact with tumor cells. We highlight what is currently known about chemokine expression by tumors of various origins and how this relates to immune suppression or activation. Chemokine signaling represents a promising area of potential anti-tumor intervention and the current state of agonists or antagonists is discussed. Overall, this review relates chemokine signaling to T cell function and emphasizes the importance of chemokines and chemokine receptors in tumor infiltration by T cells.
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Affiliation(s)
- Marianne Strazza
- Department of Medicine, New York University School of Medicine, New York, NY 10016, USA
| | - Adam Mor
- Department of Medicine, New York University School of Medicine, New York, NY 10016, USA
- Perlmutter Cancer Center, New York University School of Medicine, New York, NY 10016, USA
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14
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Del Carmen S, de Moreno de LeBlanc A, Levit R, Azevedo V, Langella P, Bermúdez-Humarán LG, LeBlanc JG. Anti-cancer effect of lactic acid bacteria expressing antioxidant enzymes or IL-10 in a colorectal cancer mouse model. Int Immunopharmacol 2016; 42:122-129. [PMID: 27912148 DOI: 10.1016/j.intimp.2016.11.017] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 10/31/2016] [Accepted: 11/18/2016] [Indexed: 02/07/2023]
Abstract
The association between inflammatory bowel diseases and colorectal cancer is well documented. The genetic modification of lactic acid bacteria as a tool to increase the anti-inflammatory potential of these microorganisms has also been demonstrated. Thus the aim of the present work was to evaluate the anti-cancer potential of different genetically modified lactic acid bacteria (GM-LAB) producing antioxidant enzymes (catalase or superoxide dismutase) or the anti-inflammatory cytokine IL-10 (protein or DNA delivery) using a chemical induced colon cancer murine model. Dimethilhydrazine was used to induce colorectal cancer in mice. The animals received GM-LAB producing anti-oxidant enzymes, IL-10 or a mixture of different GM-LAB. Intestinal damage, enzyme activities and cytokines were evaluated and compared to the results obtained from mice that received the wild type strains from which derived the GM-LAB. All the GM-LAB assayed showed beneficial effects against colon cancer even though they exerted different mechanisms of action. The importance to select LAB with innate beneficial properties as the progenitor strain was demonstrated with the GM-LAB producing anti-oxidant enzymes. In addition, the best effects for the mixtures GM-LAB that combine different anti-inflammatory mechanism. Results indicate that mixtures of selected LAB and GM-LAB could be used as an adjunct treatment to decrease the inflammatory harmful environment associated to colorectal cancer, especially for patients with chronic intestinal inflammation who have an increased risk to develop colorectal cancer.
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Affiliation(s)
- Silvina Del Carmen
- Centro de Referencia para Lactobacilos (CERELA-CONICET), San Miguel de Tucumán T4000ILC, Argentina
| | | | - Romina Levit
- Centro de Referencia para Lactobacilos (CERELA-CONICET), San Miguel de Tucumán T4000ILC, Argentina
| | - Vasco Azevedo
- Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG 31270-901, Brazil
| | - Philippe Langella
- INRA, Commensal and Probiotics-Host Interactions Laboratory, UMR 1319 Micalis, F-78350 Jouy-en-Josas, France; Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Luis G Bermúdez-Humarán
- INRA, Commensal and Probiotics-Host Interactions Laboratory, UMR 1319 Micalis, F-78350 Jouy-en-Josas, France; Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Jean Guy LeBlanc
- Centro de Referencia para Lactobacilos (CERELA-CONICET), San Miguel de Tucumán T4000ILC, Argentina.
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15
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del Carmen S, de Moreno de LeBlanc A, LeBlanc J. Development of a potential probiotic yoghurt using selected anti-inflammatory lactic acid bacteria for prevention of colitis and carcinogenesis in mice. J Appl Microbiol 2016; 121:821-30. [DOI: 10.1111/jam.13213] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 05/17/2016] [Accepted: 06/14/2016] [Indexed: 02/06/2023]
Affiliation(s)
- S. del Carmen
- Centro de Referencia para lactobacilos (CERELA-CONICET); San Miguel de Tucumán Tucumán Argentina
| | - A. de Moreno de LeBlanc
- Centro de Referencia para lactobacilos (CERELA-CONICET); San Miguel de Tucumán Tucumán Argentina
| | - J.G. LeBlanc
- Centro de Referencia para lactobacilos (CERELA-CONICET); San Miguel de Tucumán Tucumán Argentina
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16
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Clark CR, Starr TK. Mouse models for the discovery of colorectal cancer driver genes. World J Gastroenterol 2016; 22:815-822. [PMID: 26811627 PMCID: PMC4716079 DOI: 10.3748/wjg.v22.i2.815] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 09/09/2015] [Accepted: 11/24/2015] [Indexed: 02/06/2023] Open
Abstract
Colorectal cancer (CRC) constitutes a major public health problem as the third most commonly diagnosed and third most lethal malignancy worldwide. The prevalence and the physical accessibility to colorectal tumors have made CRC an ideal model for the study of tumor genetics. Early research efforts using patient derived CRC samples led to the discovery of several highly penetrant mutations (e.g., APC, KRAS, MMR genes) in both hereditary and sporadic CRC tumors. This knowledge has enabled researchers to develop genetically engineered and chemically induced tumor models of CRC, both of which have had a substantial impact on our understanding of the molecular basis of CRC. Despite these advances, the morbidity and mortality of CRC remains a cause for concern and highlight the need to uncover novel genetic drivers of CRC. This review focuses on mouse models of CRC with particular emphasis on a newly developed cancer gene discovery tool, the Sleeping Beauty transposon-based mutagenesis model of CRC.
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MESH Headings
- Adenomatous Polyposis Coli/genetics
- Adenomatous Polyposis Coli/metabolism
- Adenomatous Polyposis Coli/pathology
- Animals
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Cell Transformation, Neoplastic/genetics
- Cell Transformation, Neoplastic/metabolism
- Cell Transformation, Neoplastic/pathology
- Colorectal Neoplasms, Hereditary Nonpolyposis/genetics
- Colorectal Neoplasms, Hereditary Nonpolyposis/metabolism
- Colorectal Neoplasms, Hereditary Nonpolyposis/pathology
- Gene Expression Regulation, Neoplastic
- Genetic Predisposition to Disease
- Humans
- Mice
- Mutation
- Neoplasms, Experimental/genetics
- Neoplasms, Experimental/metabolism
- Neoplasms, Experimental/pathology
- Phenotype
- Transposases/genetics
- Transposases/metabolism
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17
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Lehman HL, Stairs DB. Single and Multiple Gene Manipulations in Mouse Models of Human Cancer. CANCER GROWTH AND METASTASIS 2015; 8:1-15. [PMID: 26380553 PMCID: PMC4558888 DOI: 10.4137/cgm.s21217] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Revised: 06/17/2015] [Accepted: 06/20/2015] [Indexed: 12/14/2022]
Abstract
Mouse models of human cancer play a critical role in understanding the molecular and cellular mechanisms of tumorigenesis. Advances continue to be made in modeling human disease in a mouse, though the relevance of a mouse model often relies on how closely it is able to mimic the histologic, molecular, and physiologic characteristics of the respective human cancer. A classic use of a genetically engineered mouse in studying cancer is through the overexpression or deletion of a gene. However, the manipulation of a single gene often falls short of mimicking all the characteristics of the carcinoma in humans; thus a multiple gene approach is needed. Here we review genetic mouse models of cancers and their abilities to recapitulate human carcinoma with single versus combinatorial approaches with genes commonly involved in cancer.
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Affiliation(s)
- Heather L Lehman
- Department of Pathology, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Douglas B Stairs
- Department of Pathology, The Pennsylvania State University College of Medicine, Hershey, PA, USA
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18
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Sáenz Robles MT, Chong JL, Koivisto C, Trimboli A, Liu H, Leone G, Pipas JM. Viral oncogene expression in the stem/progenitor cell compartment of the mouse intestine induces adenomatous polyps. Mol Cancer Res 2014; 12:1355-64. [PMID: 24994749 DOI: 10.1158/1541-7786.mcr-14-0166] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
UNLABELLED Genetic and epigenetic events that alter gene expression and/or protein function or localization are thought to be the primary mechanism that drives tumorigenesis and governs the clinical behavior of cancers. Yet, a number of studies have shown that the effects of oncogene expression or tumor suppressor ablation are highly dependent on cell type. The molecular basis for this cell-type specificity and how it contributes to tumorigenesis are unknown. Here, expression of a truncated SV40 large T antigen in murine intestinal crypts promoted the formation of numerous adenomatous polyps in the colon and small intestine. In contrast, when the same T-antigen construct is expressed in villous enterocytes, the consequences are limited to hyperplasia and dysplasia. The T-antigen-induced polyps show high levels of the proto-oncogene c-Myc protein even though there is no transport of β-catenin to the nucleus. Targeting the expression of viral oncogenes to intestinal crypts or villi provides a murine model system for studying cell-type specific effects in tumorigenesis, and is particularly relevant to the study of APC/β-catenin-independent pathways contributing to the generation of intestinal polyps. IMPLICATIONS This mouse model system describes the formation of colon polyps in the absence of Wnt/β-catenin signaling.
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Affiliation(s)
| | - Jean Leon Chong
- Department of Human Genetics and Cancer Center, Ohio State University, Columbus, Ohio
| | - Christopher Koivisto
- Department of Human Genetics and Cancer Center, Ohio State University, Columbus, Ohio
| | - Anthony Trimboli
- Department of Human Genetics and Cancer Center, Ohio State University, Columbus, Ohio
| | - Huayang Liu
- Department of Human Genetics and Cancer Center, Ohio State University, Columbus, Ohio
| | - Gustavo Leone
- Department of Human Genetics and Cancer Center, Ohio State University, Columbus, Ohio
| | - James M Pipas
- Department of Biological Sciences, University of Pittsburgh. Pittsburgh, Pennsylvania.
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19
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Wang K, Huang C, Nice EC. Proteomics, genomics and transcriptomics: their emerging roles in the discovery and validation of colorectal cancer biomarkers. Expert Rev Proteomics 2014; 11:179-205. [PMID: 24611605 DOI: 10.1586/14789450.2014.894466] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Colorectal cancer (CRC) is the second most common cancer in females and the third in males. Since CRC is often diagnosed at an advanced stage when prognosis is poor, identification of biomarkers for early diagnosis is urgently required. Recent advances in proteomics, genomics and transcriptomics have facilitated high-throughput profiling of data generated from CRC-related genes and proteins, providing a window of information for biomarker discovery and validation. However, transfer of candidate biomarkers from bench to bedside remains a dilemma. In this review, we will discuss emerging proteomic technologies and highlight various sample types utilized for proteomics-based identification of CRC biomarkers. Moreover, recent breakthroughs in genomics and transcriptomics for the identification of CRC biomarkers, with particular emphasis on the merits of emerging methylomic and miRNAomic strategies, will be discussed. Integration of proteomics, genomics and transcriptomics will facilitate the discovery and validation of CRC biomarkers leading to the emergence of personalized medicine.
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Affiliation(s)
- Kui Wang
- The State Key Laboratory of Biotherapy, West China Hospital, Sichuan University , Chengdu, 610041 , P.R. China
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