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Zhang X, Chen YC, Yao M, Xiong R, Liu B, Zhu X, Ao P. Potential therapeutic targets of gastric cancer explored under endogenous network modeling of clinical data. Sci Rep 2024; 14:13127. [PMID: 38849404 PMCID: PMC11161650 DOI: 10.1038/s41598-024-63812-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 06/03/2024] [Indexed: 06/09/2024] Open
Abstract
Improvement in the survival rate of gastric cancer, a prevalent global malignancy and the leading cause of cancer-related mortality calls for more avenues in molecular therapy. This work aims to comprehend drug resistance and explore multiple-drug combinations for enhanced therapeutic treatment. An endogenous network modeling clinic data with core gastric cancer molecules, functional modules, and pathways is constructed, which is then transformed into dynamics equations for in-silicon studies. Principal component analysis, hierarchical clustering, and K-means clustering are utilized to map the attractor domains of the stochastic model to the normal and pathological phenotypes identified from the clinical data. The analyses demonstrate gastric cancer as a cluster of stable states emerging within the stochastic dynamics and elucidate the cause of resistance to anti-VEGF monotherapy in cancer treatment as the limitation of the single pathway in preventing cancer progression. The feasibility of multiple objectives of therapy targeting specified molecules and/or pathways is explored. This study verifies the rationality of the platform of endogenous network modeling, which contributes to the development of cross-functional multi-target combinations in clinical trials.
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Affiliation(s)
- Xile Zhang
- Center for Quantitative Life Sciences and Physics Department, Shanghai University, Shanghai, 200444, China
| | - Yong-Cong Chen
- Center for Quantitative Life Sciences and Physics Department, Shanghai University, Shanghai, 200444, China.
| | - Mengchao Yao
- Center for Quantitative Life Sciences and Physics Department, Shanghai University, Shanghai, 200444, China
| | - Ruiqi Xiong
- Center for Quantitative Life Sciences and Physics Department, Shanghai University, Shanghai, 200444, China
| | - Bingya Liu
- Department of General Surgery, Shanghai Institute of Digestive Surgery, Shanghai Key Laboratory of Gastric Cancer, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Xiaomei Zhu
- Shanghai Key Laboratory of Modern Optical Systems, School of Optoelectronic Information and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Ping Ao
- School of Biomedical Engineering, Sichuan University, Chengdu, 610065, China
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2
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Chen C, Chen X, Jiang J. Long-term effect of neoadjuvant radiotherapy in patients with locally advanced rectal mucinous adenocarcinoma: a population-based study of 1514 patients. Sci Rep 2023; 13:11696. [PMID: 37474620 PMCID: PMC10359247 DOI: 10.1038/s41598-023-38846-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 07/16/2023] [Indexed: 07/22/2023] Open
Abstract
Rectal mucinous adenocarcinoma (RMAC) is a rare and aggressive form of rectal cancer. The effectiveness of neoadjuvant radiotherapy (NRT) for RMAC has not been well studied, and the survival benefit remains controversial. The purpose of this work was to determine the prognostic role of NRT in patients with RMAC by propensity-score matching (PSM). A retrospective cohort study using the Surveillance, Epidemiology, and End Results from 2004 to 2015 was performed. In the multivariate analysis before PSM, NRT provided better OS (HR 0.61, 95% CI 0.52-0.71, p < 0.001) and CSS (HR 0.68, 95% CI 0.56-0.82, p < 0.001). Multivariate analysis after PSM (n = 844) confirmed that patients receiving NRT survived longer than those without NRT (OS: HR 0.60, 95% CI 0.50-0.78, p < 0.001 and CSS: HR 0.68, 95% CI 0.54-0.84, p < 0.001). Subgroup analysis indicated that NRT had significantly improved OS and CSS in stage II RMAC and OS in stage III RMAC after adjusting for various confounding factors.
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Affiliation(s)
- Can Chen
- Department of Oncology, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu Province, China
| | - Xi Chen
- Department of Dermatology, The First Affiliated Hospital of Huzhou University, Huzhou, Zhejiang Province, China
| | - Jingting Jiang
- Department of Tumor Biological Treatment, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu Province, China.
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3
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Alradhi M, Wen S, Safi M, Al‐danakh A, Wang H, Shopit A, Sun M, Fan B, Li X. Molecular genetic and clinical characteristic analysis of primary signet ring cell carcinoma of urinary bladder identified by a novel OR2L5 mutation. Cancer Med 2023; 12:3931-3951. [PMID: 36779496 PMCID: PMC9972163 DOI: 10.1002/cam4.5121] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 07/16/2022] [Accepted: 07/26/2022] [Indexed: 11/11/2022] Open
Abstract
To get a better understanding of the genetic basis of primary signet ring cell carcinoma (SRCC) of the bladder, which is highly rare and not yet explored. First, by using immunohistochemistry to find histological pathological characteristics. Second, a massively parallel whole-exome sequencing (WES) was performed on a 58-year-old male patient who had painless macroscopic hematuria and was pathologically diagnosed with primary SRCC of the bladder, followed by comparing with genes of ordinary urothelial cancer (UC) from TCGA. Furthermore, a population-based analysis using the SEER database was performed to investigate the prognosis (SRCC vs. UC). We identified 63 copy number variations (CNVs) with gain counts and 181 CNVs with loss counts. Totally 4515 mutations were discovered in C > T with a success rate of greater than 89%. The most frequently mutated pathway was RTK-RAS which has 85 genes involved in carcinogenic signaling. Final screening on predisposing genes is performed after filtering based on ACMG. Moreover, several driver genes, including NBN, KCTD18, SPATA13, ANKRD36, OR2L5, MALRD1, and LSMEM1, were detected. Sanger sequencing of germline DNA revealed the presence of a mutant base A/G of OR2L5 in the sequence, which was discovered for the first time in primary SRCC of the bladder. Furthermore, the immunohistochemical profile showed that primary SRCC of the bladder were positive for CK7, CK20, GATA-3, and expression of CK(AE1/AE2), EMA, and Ki67. In the SEER-based study, the patients with primary SRCC of the bladder got a worse prognosis compared to those with UC with median months overall survival (OS) 14 vs. 41, respectively, P = 0001, even after adjusting the variables in the Cox regression model, the SRCC of the bladder showed worse survival HR = 1.119, 95% CI = (1.081-1.328), P = 0.0001. These results imply that suppression of potential driver mutations may be a viable adjuvant treatment approach for primary SRCC in the bladder in place of standard chemotherapy, a possibility that warrants further clinical investigation.
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Affiliation(s)
- Mohammed Alradhi
- Department of Urology, Second Affiliated Hospital of Dalian Medical UniversityDalianChina
| | - Shuang Wen
- Department of Pathology, Dalian Friendship HospitalDalianChina
| | - Mohammed Safi
- Department of Respiratory DiseasesShandong Second Provincial General Hospital Shandong UniversityShandongChina
| | - Abdullah Al‐danakh
- Department of Urology, First Affiliated Hospital of Dalian Medical UniversityDalianChina
| | - Honglong Wang
- Department of Pathology, Dalian Friendship HospitalDalianChina
| | - Abdullah Shopit
- Department of Pharmacology, Dalian Medical UniversityDalianChina
| | - Min Sun
- Department of General Surgery, Taihe Hospital, Hubei University of MedicineHubeiChina
| | - Bo Fan
- Department of Urology, Second Affiliated Hospital of Dalian Medical UniversityDalianChina
| | - Xiancheng Li
- Department of Urology, Second Affiliated Hospital of Dalian Medical UniversityDalianChina
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Zhang L, Dong B, Yuan X. Expression of ALDH1 plays the important role during generation and progression in human cervical cancer. Biotechnol Genet Eng Rev 2022:1-12. [PMID: 36566391 DOI: 10.1080/02648725.2022.2161211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Cervical cancer which is caused by persistent infection with oncogenic human papillomavirus (HPV), is the third most common cancer. HPV infection causes the progression of the normal cervix to cervical intraepithelial neoplasia (CIN) because it often occurs at the function conversion of the cervical squamous epithelium and columnar epithelium zone, further to invasive carcinoma. The difference in the ALDH1 expression was very significant. With the progression of cervical cancer, reports explained obviously increased nuclear and cytoplasm ALDH1 staining in comparisons of cervical carcinomas and normal cervix (P < 0.0001), cervical carcinomas compared with CIN (P = 0.0002). Therefore, ALDH1 as a stem marker, not only resists cervical cancer but also resists in normal cervix and CIN tissues. Developing an experimental method to discover cervical cancer earlier is feasible. Furthermore, the ALDH1 was expressed in human cervical cancer cell lines (Hela, SiHa, CaSki, HT-3, and C33A) together with western blot and immunocytochemical analysis. ALDH1 plays a significant role in nuclear and cytoplasm staining by immunochemistry in single or clustered HT-3 and C33A cells. However, western blot and immunochemical analysis did not detect ALDH1 in HeLa or CaSki, SiHa cells. We also discovered that there were no remarkable differences in age, tumor size, clinical TNM staging, multiple pelvic lymph node metastasis, or histological staging (p > 0.05) between the ALDH1-positive groups in 100 cervical cancer tissues. But after the control variable age, different ALDH rating survival function contrasted, it can be concluded that the higher ALDH1 scores with the survival of patients with the worse condition.
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Affiliation(s)
- Li Zhang
- Department of Obstetrics and Gynecology, The Aviation Hanzhong 3201 Hospital, Xi'an Jiao Tong University, Hanzhong, Shaanxi, China
| | - Bingying Dong
- Department of Obstetrics and Gynecology, The Aviation Hanzhong 3201 Hospital, Xi'an Jiao Tong University, Hanzhong, Shaanxi, China
| | - Xiaoli Yuan
- Department of Obstetrics and Gynecology, The Aviation Hanzhong 3201 Hospital, Xi'an Jiao Tong University, Hanzhong, Shaanxi, China
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Thanaskody K, Jusop AS, Tye GJ, Wan Kamarul Zaman WS, Dass SA, Nordin F. MSCs vs. iPSCs: Potential in therapeutic applications. Front Cell Dev Biol 2022; 10:1005926. [PMID: 36407112 PMCID: PMC9666898 DOI: 10.3389/fcell.2022.1005926] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 10/21/2022] [Indexed: 01/24/2023] Open
Abstract
Over the past 2 decades, mesenchymal stem cells (MSCs) have attracted a lot of interest as a unique therapeutic approach for a variety of diseases. MSCs are capable of self-renewal and multilineage differentiation capacity, immunomodulatory, and anti-inflammatory properties allowing it to play a role in regenerative medicine. Furthermore, MSCs are low in tumorigenicity and immune privileged, which permits the use of allogeneic MSCs for therapies that eliminate the need to collect MSCs directly from patients. Induced pluripotent stem cells (iPSCs) can be generated from adult cells through gene reprogramming with ectopic expression of specific pluripotency factors. Advancement in iPS technology avoids the destruction of embryos to make pluripotent cells, making it free of ethical concerns. iPSCs can self-renew and develop into a plethora of specialized cells making it a useful resource for regenerative medicine as they may be created from any human source. MSCs have also been used to treat individuals infected with the SARS-CoV-2 virus. MSCs have undergone more clinical trials than iPSCs due to high tumorigenicity, which can trigger oncogenic transformation. In this review, we discussed the overview of mesenchymal stem cells and induced pluripotent stem cells. We briefly present therapeutic approaches and COVID-19-related diseases using MSCs and iPSCs.
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Affiliation(s)
- Kalaiselvaan Thanaskody
- Centre for Tissue Engineering and Regenerative Medicine (CTERM), Faculty of Medicine, University Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Amirah Syamimi Jusop
- Centre for Tissue Engineering and Regenerative Medicine (CTERM), Faculty of Medicine, University Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Gee Jun Tye
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Gelugor, Malaysia
| | - Wan Safwani Wan Kamarul Zaman
- Department of Biomedical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur, Malaysia,Centre for Innovation in Medical Engineering (CIME), Department of Biomedical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Sylvia Annabel Dass
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Gelugor, Malaysia
| | - Fazlina Nordin
- Centre for Tissue Engineering and Regenerative Medicine (CTERM), Faculty of Medicine, University Kebangsaan Malaysia, Kuala Lumpur, Malaysia,*Correspondence: Fazlina Nordin,
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Behl T, Kaur I, Sehgal A, Singh S, Sharma N, Chigurupati S, Felemban SG, Alsubayiel AM, Iqbal MS, Bhatia S, Al-Harrasi A, Bungau S, Mostafavi E. "Cutting the Mustard" with Induced Pluripotent Stem Cells: An Overview and Applications in Healthcare Paradigm. Stem Cell Rev Rep 2022; 18:2757-2780. [PMID: 35793037 DOI: 10.1007/s12015-022-10390-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/15/2022] [Indexed: 12/09/2022]
Abstract
Treatment of numerous ailments has been made accessible by the advent of genetic engineering, where the self-renewal property has unfolded the mysteries of regeneration, i.e., stem cells. This is narrowed down to pluripotency, the cell property of differentiating into other adult cells. The generation of induced pluripotent stem cells (iPSCs) was a major breakthrough in 2006, which was generated by a cocktail of 4 Yamanaka Factors, following which significant advancements have been reported in medical science and therapeutics. The iPSCs are reprogrammed from somatic cells, and the fascinating results focused on developing authentic techniques for their generation via molecular reprogramming mechanisms, with a plethora of molecules, like NANOG, miRNAs, and DNA modifying agents, etc. The iPSCs have exhibited reliable results in assessing the etiology and molecular mechanisms of diseases, followed by the development of possible treatments and the elimination of risks of immune rejection. The authors formulate a comprehensive review to develop a clear understanding of iPSC generation, their advantages and limitations, with potential challenges associated with their medical utility. In addition, a wide compendium of applications of iPSCs in regenerative medicine and disease modeling has been discussed, alongside bioengineering technologies for iPSC reprogramming, expansion, isolation, and differentiation. The manuscript aims to provide a holistic picture of the booming advancement of iPSC therapy, to attract the attention of global researchers, to investigate this versatile approach in treatment of multiple disorders, subsequently overcoming the challenges, in order to effectively expand its therapeutic window.
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Affiliation(s)
- Tapan Behl
- Chitkara College of Pharmacy, Chitkara University, Rajpura, Punjab, India.
| | - Ishnoor Kaur
- Chitkara College of Pharmacy, Chitkara University, Rajpura, Punjab, India
| | - Aayush Sehgal
- Chitkara College of Pharmacy, Chitkara University, Rajpura, Punjab, India
| | - Sukhbir Singh
- Chitkara College of Pharmacy, Chitkara University, Rajpura, Punjab, India
| | - Neelam Sharma
- Chitkara College of Pharmacy, Chitkara University, Rajpura, Punjab, India
| | - Sridevi Chigurupati
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Qassim University, Buraydah, Kingdom of Saudi Arabia
| | - Shatha Ghazi Felemban
- Department of Medical Laboratory Science, Fakeeh College for Medical Sciences, Jeddah, Kingdom of Saudi Arabia
| | - Amal M Alsubayiel
- Department of Pharmaceutics, College of Pharmacy, Qassim University, Buraydah, Kingdom of Saudi Arabia
| | - Muhammad Shahid Iqbal
- Department of Clinical Pharmacy, College of Pharmacy, Prince Sattam bin Abdulaziz University, Alkharj, Saudi Arabia
| | - Saurabh Bhatia
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa, Oman.,School of Health Science, University of Petroleum and Energy Studies, Dehradun, Uttarakhand, India
| | - Ahmed Al-Harrasi
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa, Oman
| | - Simona Bungau
- Department of Pharmacy, Faculty of Medicine and Pharmacy, University of Oradea, Oradea, Romania
| | - Ebrahim Mostafavi
- Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA. .,Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, USA.
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Regan JL, Schumacher D, Staudte S, Steffen A, Lesche R, Toedling J, Jourdan T, Haybaeck J, Golob-Schwarzl N, Mumberg D, Henderson D, Győrffy B, Regenbrecht CR, Keilholz U, Schäfer R, Lange M. Identification of a Neural Development Gene Expression Signature in Colon Cancer Stem Cells Reveals a Role for EGR2 in Tumorigenesis. iScience 2022; 25:104498. [PMID: 35720265 PMCID: PMC9204726 DOI: 10.1016/j.isci.2022.104498] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 02/28/2022] [Accepted: 05/26/2022] [Indexed: 11/12/2022] Open
Abstract
Recent evidence demonstrates that colon cancer stem cells (CSCs) can generate neurons that synapse with tumor innervating fibers required for tumorigenesis and disease progression. Greater understanding of the mechanisms that regulate CSC driven tumor neurogenesis may therefore lead to more effective treatments. RNA-sequencing analyses of ALDHPositive CSCs from colon cancer patient-derived organoids (PDOs) and xenografts (PDXs) showed CSCs to be enriched for neural development genes. Functional analyses of genes differentially expressed in CSCs from PDO and PDX models demonstrated the neural crest stem cell (NCSC) regulator EGR2 to be required for tumor growth and to control expression of homebox superfamily embryonic master transcriptional regulator HOX genes and the neural stem cell and master cell fate regulator SOX2. These data support CSCs as the source of tumor neurogenesis and suggest that targeting EGR2 may provide a therapeutic differentiation strategy to eliminate CSCs and block nervous system driven disease progression. Colon cancer stem cells (CSCs) are enriched for nervous system development genes Colon cancer cells express nerve cell markers EGR2 is required for CSC survival and tumor growth and regulates SOX2 and HOX genes Targeting EGR2 may block cancer neurogenesis and stop disease progression
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He Q, Liu L, Wei J, Jiang J, Rong Z, Chen X, Zhao J, Jiang K. Roles and action mechanisms of bile acid-induced gastric intestinal metaplasia: a review. Cell Death Dis 2022; 8:158. [PMID: 35379788 PMCID: PMC8979943 DOI: 10.1038/s41420-022-00962-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 03/11/2022] [Accepted: 03/17/2022] [Indexed: 12/13/2022]
Abstract
Gastric intestinal metaplasia (IM) is a precancerous lesion that increases the risk of subsequent gastric cancer (GC) development. Therefore, the mechanism of IM has been the focus of basic and clinical research. Helicobacter pylori (H. pylori) infection has been recognized as the main pathogenesis of gastric IM. However, more and more studies have shown that chronic inflammation of gastric mucosa caused by bile reflux is the key pathogenic factor of gastric IM. Bile reflux activates the expression of IM biomarkers via the bile acid receptor. In addition, microRNAs, exosomes, and epigenetics are also involved in the occurrence and development of bile acid-induced gastric IM. Currently, the relevant research is still very few. The molecular mechanism of the phenotypic transformation of gastrointestinal epithelial cells induced by bile acids has not been fully understood. This article mainly reviews the physiology and pathology of bile acid, mechanism of gastric IM induced by bile acid, bile acid receptors, and so on, in order to provide reference for further research.
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Affiliation(s)
- Qijin He
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, No. 154 Anshan Road, Tianjin, 300052, China
| | - Limin Liu
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, No. 154 Anshan Road, Tianjin, 300052, China
| | - Jingge Wei
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, No. 154 Anshan Road, Tianjin, 300052, China
| | - Jiaying Jiang
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, No. 154 Anshan Road, Tianjin, 300052, China
| | - Zheng Rong
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, No. 154 Anshan Road, Tianjin, 300052, China
| | - Xin Chen
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, No. 154 Anshan Road, Tianjin, 300052, China.
| | - Jingwen Zhao
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, No. 154 Anshan Road, Tianjin, 300052, China.
| | - Kui Jiang
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, No. 154 Anshan Road, Tianjin, 300052, China.
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GÜNEY N, GÜRSES İ, SERİNSÖZ LİNKE E, GÜRSOY D, ÜÇBİLEK E, ÇOLAK T. Kolon adenokarsinomlarında ve adenomatöz poliplerinde Beta-Catenin ve Sox2 ekspresyonu ve klinikopatolojik parametreler ile ilişkileri. MUSTAFA KEMAL ÜNIVERSITESI TIP DERGISI 2022. [DOI: 10.17944/mkutfd.962373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Objective: Our aim was to investigate the immunohistochemical expression of β-catenin and Sox-2 in adenomatous polyps and adenocarcinoma of colon and also to evaluate the effects of these markers in adenoma-carcinoma sequence and their association with clinicopathological parameters.
Methods: Fifty-six tubular adenomas with low grade dysplasia (TALGD), 53 tubular adenomas with high grade dysplasia (TAHGD), 44 tubulovillous adenomas (TVA), 29 villous adenomas (VA) and 60 adenocarcinomas were included in the study. The nuclear staining of Sox2 was evaluated as well as both nuclear and cytoplasmic stainings of β-catenin. A semiquantitative scoring was performed. The results were compared between the groups and the relationship of the results with clinicopathological parameters was evaluated.
Results: Nuclear and cytoplasmic β-catenin expressions of the adenocarcinomas were higher than polyps. The expressions in the VA and TVA polyp groups were higher than the expressions in TAHGD and TALGD, respectively. Membranous β-catenin expression in the adenocarcinoma was higher than the polyps except VA. The evaluation between polyp groups with respect to membranous β-catenin staining revealed a statistically significantly difference in favor of VA compared with TVA, TAHGD and TALGD; in favor of TAHGD compared with TVA, in favor of TVA compared with TALGD while it was found statistically significantly higher in TAHGD than TALGD.
Conclusion: The results regarding β-catenin expression of the polyp groups were consistent with the literature. There was a positive correlation between β-catenin expression (nuclear and cytoplasmic) and malignancy. High Sox2 expressions were found correlated with malignancy potential. Large sampling size investigations to be supported by further molecular studies are needed to clarify the effect of Sox2 expression in the sequence of adenoma-carcinoma comprehensively.
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Affiliation(s)
- Neslihan GÜNEY
- UNIVERSITY OF HEALTH SCIENCES, İZMİR TEPECİK HEALTH RESEARCH CENTER, DEPARTMENT OF SURGICAL MEDICAL SCIENCES
| | - İclal GÜRSES
- İSTANBUL ÜNİVERSİTESİ-CERRAHPAŞA, CERRAHPAŞA TIP FAKÜLTESİ, CERRAHİ TIP BİLİMLERİ BÖLÜMÜ, TIBBİ PATOLOJİ ANABİLİM DALI
| | | | - Didar GÜRSOY
- HATAY MUSTAFA KEMAL ÜNİVERSİTESİ, TAYFUR ATA SÖKMEN TIP FAKÜLTESİ, CERRAHİ TIP BİLİMLERİ BÖLÜMÜ, TIBBİ PATOLOJİ ANABİLİM DALI
| | - Enver ÜÇBİLEK
- MERSIN UNIVERSITY, SCHOOL OF MEDICINE, DEPARTMENT OF INTERNAL MEDICINE, DEPARTMENT OF INTERNAL MEDICINE, GASTROENTEROLOGY
| | - Tahsin ÇOLAK
- MERSİN ÜNİVERSİTESİ, TIP FAKÜLTESİ, CERRAHİ TIP BİLİMLERİ BÖLÜMÜ, GENEL CERRAHİ ANABİLİM DALI
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10
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Huang A, Yang Y, Shi JY, Li YK, Xu JX, Cheng Y, Gu J. Mucinous adenocarcinoma: A unique clinicopathological subtype in colorectal cancer. World J Gastrointest Surg 2021; 13:1567-1583. [PMID: 35070064 PMCID: PMC8727185 DOI: 10.4240/wjgs.v13.i12.1567] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 07/02/2021] [Accepted: 08/30/2021] [Indexed: 02/06/2023] Open
Abstract
Mucinous adenocarcinoma (MAC) is a unique clinicopathological subtype of colorectal cancer, which is characterized by extracellular mucinous components that comprise at least 50% of the tumor tissue. The clinical characteristics, molecular features, response to chemo-/radiotherapy, and prognosis of MAC are different from that of non-MAC (NMAC). MAC is more common in the proximal colon, with larger volume, higher T-stage, a higher proportion of positive lymph nodes, poorer tumor differentiation, and a higher proportion of peritoneal implants compared to NMAC. Although biopsy is the main diagnostic method for MAC, magnetic resonance imaging is superior in accuracy, especially for rectal carcinoma. The aberrant expression of mucins, including MUC1, MUC2 and MUC5AC, is a notable feature of MAC, which may be related to tumor invasion, metastasis, inhibition of apoptosis, and chemo-/radiotherapy resistance. The genetic origin of MAC is mainly related to BRAF mutation, microsatellite instability, and the CpG island methylator phenotype pathway. In addition, the poor prognosis of rectal MAC has been confirmed by various studies, and that of colonic MAC is still controversial. In this review, we summarize the epidemiology, clinicopathological characteristics, molecular features, methods of diagnosis, and treatments of MAC in order to provide references for further fundamental and clinical research.
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Affiliation(s)
- An Huang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Gastrointestinal Surgery III, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Yong Yang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Gastrointestinal Surgery III, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Jing-Yi Shi
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Gastrointestinal Surgery III, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Yu-Kun Li
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Gastrointestinal Surgery III, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Jing-Xuan Xu
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Gastrointestinal Surgery III, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Yu Cheng
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Gastrointestinal Surgery III, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Jin Gu
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Gastrointestinal Surgery III, Peking University Cancer Hospital & Institute, Beijing 100142, China
- Peking-Tsinghua Center for Life Science, Peking University International Cancer Center, Beijing 100142, China
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing 100144, China
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11
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Basu A, Tiwari VK. Epigenetic reprogramming of cell identity: lessons from development for regenerative medicine. Clin Epigenetics 2021; 13:144. [PMID: 34301318 PMCID: PMC8305869 DOI: 10.1186/s13148-021-01131-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 07/13/2021] [Indexed: 12/17/2022] Open
Abstract
Epigenetic mechanisms are known to define cell-type identity and function. Hence, reprogramming of one cell type into another essentially requires a rewiring of the underlying epigenome. Cellular reprogramming can convert somatic cells to induced pluripotent stem cells (iPSCs) that can be directed to differentiate to specific cell types. Trans-differentiation or direct reprogramming, on the other hand, involves the direct conversion of one cell type into another. In this review, we highlight how gene regulatory mechanisms identified to be critical for developmental processes were successfully used for cellular reprogramming of various cell types. We also discuss how the therapeutic use of the reprogrammed cells is beginning to revolutionize the field of regenerative medicine particularly in the repair and regeneration of damaged tissue and organs arising from pathological conditions or accidents. Lastly, we highlight some key challenges hindering the application of cellular reprogramming for therapeutic purposes.
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Affiliation(s)
- Amitava Basu
- Institute of Molecular Biology (IMB), 55128, Mainz, Germany.
| | - Vijay K Tiwari
- Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry and Biomedical Science, Queens University Belfast, Belfast, BT9 7BL, UK.
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12
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Lu YZ, Li Y, Zhang T, Han ST. Claudin-6 is down-regulated in gastric cancer and its potential pathway. Cancer Biomark 2021; 28:329-340. [PMID: 32390606 DOI: 10.3233/cbm-201554] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Claudins are indispensible in modulating the permeability of epithelial and endothelial cells and in the maintenance of cell polarity. In order to verify the function of claudin-6 in the development of gastric cancer, we investigated claudin-6 expression in different gastric disease tissues. Moreover, we further explored whether overexpression of claudin-6 altered proliferation, apoptosis, migration, invasiveness, differentiation in BGC-823 cells and the potential mechanism. Immunohistochemistry was performed to detect the in situ expression of claudin-6 in different gastric disease tissues; moreover, cell culture, real-time PCR and western blot were used to evaluate the effect of overexpression of claudin-6 in vitro and the related mechanism. The results of immunohistochemical staining showed that the positivity of claudin-6 was significantly higher in superficial gastritis than that in gastric cancer. Overexpression of claudin-6 induced differentiation of BGC-823 cells by inhibiting the JNK pathway. However, it had no effect on proliferation, apoptosis, migration or invasiveness in vitro. The expression of claudin-6 was decreased in gastric cancer. Overexpression of claudin-6 induced differentiation of gastric cancer cells by inhibiting the JNK pathway.
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Affiliation(s)
- You-Zhu Lu
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China.,Digestive Department, The First Hospital of China Medical University, Shenyang, Liaoning, China
| | - Yang Li
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Ting Zhang
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Shu-Tang Han
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
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13
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Kumar D, Talluri TR, Selokar NL, Hyder I, Kues WA. Perspectives of pluripotent stem cells in livestock. World J Stem Cells 2021; 13:1-29. [PMID: 33584977 PMCID: PMC7859985 DOI: 10.4252/wjsc.v13.i1.1] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 09/28/2020] [Accepted: 11/09/2020] [Indexed: 02/06/2023] Open
Abstract
The recent progress in derivation of pluripotent stem cells (PSCs) from farm animals opens new approaches not only for reproduction, genetic engineering, treatment and conservation of these species, but also for screening novel drugs for their efficacy and toxicity, and modelling of human diseases. Initial attempts to derive PSCs from the inner cell mass of blastocyst stages in farm animals were largely unsuccessful as either the cells survived for only a few passages, or lost their cellular potency; indicating that the protocols which allowed the derivation of murine or human embryonic stem (ES) cells were not sufficient to support the maintenance of ES cells from farm animals. This scenario changed by the innovation of induced pluripotency and by the development of the 3 inhibitor culture conditions to support naïve pluripotency in ES cells from livestock species. However, the long-term culture of livestock PSCs while maintaining the full pluripotency is still challenging, and requires further refinements. Here, we review the current achievements in the derivation of PSCs from farm animals, and discuss the potential application areas.
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Affiliation(s)
- Dharmendra Kumar
- Animal Physiology and Reproduction Division, ICAR-Central Institute for Research on Buffaloes, Hisar 125001, India.
| | - Thirumala R Talluri
- Equine Production Campus, ICAR-National Research Centre on Equines, Bikaner 334001, India
| | - Naresh L Selokar
- Animal Physiology and Reproduction Division, ICAR-Central Institute for Research on Buffaloes, Hisar 125001, India
| | - Iqbal Hyder
- Department of Physiology, NTR College of Veterinary Science, Gannavaram 521102, India
| | - Wilfried A Kues
- Department of Biotechnology, Friedrich-Loeffler-Institute, Federal Institute of Animal Health, Neustadt 31535, Germany
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14
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Differential expression of intestinal genes in necrotic enteritis challenged broiler chickens with 2 different Clostridium perfringens strains. Poult Sci 2020; 100:100886. [PMID: 33516477 PMCID: PMC7936145 DOI: 10.1016/j.psj.2020.11.063] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 11/02/2020] [Accepted: 11/23/2020] [Indexed: 12/20/2022] Open
Abstract
The primary cause of necrotic enteritis (NE) disease in chickens is the NetB-positive Clostridium perfringens bacterium. Many factors are known to affect the severity of NE in the challenge models of broiler chickens, and one of these factors is the virulence of C. perfringens strain. This study was conducted to evaluate the effect of 2 pathogenic C. perfringens strains in a NE challenge model on gut health and mRNA expression of genes encoding apoptosis, tight junction, immunity, and nutrient transporters in broilers. Day-old Ross-308 male broilers (n = 468) were allocated in a 2 × 3 factorial arrangement of treatments with in-feed antibiotics (no or yes) and challenge (Non, C. perfringens strain NE18, and C. perfringens strain NE36) as the factors. The birds in the challenged groups were inoculated with Eimeria species on day 9 and with a fresh suspension of C. perfringens NE18 or NE36 on day 14 and 15. Sample collection was performed on 2 birds of each pen on day 16. Necrotic enteritis challenge, impaired feed conversion ratio during day 0 to 16 compared with the control group where the effect of the NE36 challenge was more severe than that with NE18 (P < 0.001). The mRNA expression of mucin-2, immunoglobulin-G, occludin (P < 0.001), and tight junction protein-1 (P < 0.05) genes were downregulated in both challenged groups compared with the nonchallenged counterparts. Antibiotic supplementation, on the other hand, increased weight gain, and feed intake in all challenged birds (P < 0.01), but upregulated mucin-5ac and alanine, serine, cysteine, and threonine transporter-1 (P < 0.05) only in the NE18 challenged birds. The challenge with NE36 significantly upregulated caspase-8 and claudin-1 (P < 0.001), but downregulated glucose transporter-2 (P < 0.001) compared with the NE18 challenge. These results suggest that NE challenge is detrimental to the performance of broilers through compromised intestinal health, and different C. perfringens strains can affect the severity of the disease through modulating the expression of intestinal genes encoding proteins responsible for apoptosis, gut integrity, immunity, mucus production, and nutrient transporters.
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15
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Pothuraju R, Krishn SR, Gautam SK, Pai P, Ganguly K, Chaudhary S, Rachagani S, Kaur S, Batra SK. Mechanistic and Functional Shades of Mucins and Associated Glycans in Colon Cancer. Cancers (Basel) 2020; 12:E649. [PMID: 32168759 PMCID: PMC7139953 DOI: 10.3390/cancers12030649] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 02/28/2020] [Accepted: 03/02/2020] [Indexed: 02/08/2023] Open
Abstract
Mucus serves as the chief protective barrier against pathogenic and mechanical insults in respiratory, gastrointestinal, and urogenital tracts. Altered mucin expression, the major component of mucus, in conjunction with differential glycosylation has been strongly associated with both benign and malignant pathologies of colon. Mucins and their associated glycans arbitrate their impact sterically as well as mechanically by altering molecular and microbial spectrum during pathogenesis. Mucin expression in normal and pathological conditions is regulated by nonspecific (dietary factors and gut microbiota) and specific (epigenetic and transcriptional) modulators. Further, recent studies highlight the impact of altering mucin glycome (cancer-associated carbohydrate antigens including Tn, Sialyl-Tn, Sialyl-Lew A, and Sialyl-Lewis X) on host immunomodulation, antitumor immunity, as well as gut microbiota. In light of emerging literature, the present review article digs into the impact of structural organization and of expressional and glycosylation alteration of mucin family members on benign and malignant pathologies of colorectal cancer.
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Affiliation(s)
- Ramesh Pothuraju
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (R.P.); (S.R.K.); (S.K.G.); (P.P.); (K.G.); (S.C.); (S.R.); (S.K.)
| | - Shiv Ram Krishn
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (R.P.); (S.R.K.); (S.K.G.); (P.P.); (K.G.); (S.C.); (S.R.); (S.K.)
| | - Shailendra K. Gautam
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (R.P.); (S.R.K.); (S.K.G.); (P.P.); (K.G.); (S.C.); (S.R.); (S.K.)
| | - Priya Pai
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (R.P.); (S.R.K.); (S.K.G.); (P.P.); (K.G.); (S.C.); (S.R.); (S.K.)
| | - Koelina Ganguly
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (R.P.); (S.R.K.); (S.K.G.); (P.P.); (K.G.); (S.C.); (S.R.); (S.K.)
| | - Sanjib Chaudhary
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (R.P.); (S.R.K.); (S.K.G.); (P.P.); (K.G.); (S.C.); (S.R.); (S.K.)
| | - Satyanarayana Rachagani
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (R.P.); (S.R.K.); (S.K.G.); (P.P.); (K.G.); (S.C.); (S.R.); (S.K.)
| | - Sukhwinder Kaur
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (R.P.); (S.R.K.); (S.K.G.); (P.P.); (K.G.); (S.C.); (S.R.); (S.K.)
| | - Surinder K. Batra
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (R.P.); (S.R.K.); (S.K.G.); (P.P.); (K.G.); (S.C.); (S.R.); (S.K.)
- Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68105, USA
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 68198, USA
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16
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Luo C, Cen S, Ding G, Wu W. Mucinous colorectal adenocarcinoma: clinical pathology and treatment options. Cancer Commun (Lond) 2019; 39:13. [PMID: 30922401 PMCID: PMC6440160 DOI: 10.1186/s40880-019-0361-0] [Citation(s) in RCA: 146] [Impact Index Per Article: 29.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 03/21/2019] [Indexed: 02/07/2023] Open
Abstract
Mucinous colorectal adenocarcinoma is a distinct subtype of colorectal cancer (CRC) characterized by the presence of abundant extracellular mucin which accounts for at least 50% of the tumor volume. Mucinous colorectal adenocarcinoma is found in 10%–20% of CRC patients and occurs more commonly in female and younger patients. Moreover, mucinous colorectal adenocarcinoma is more frequently located in the proximal colon and diagnosed at an advanced stage. Based on its molecular context, mucinous colorectal adenocarcinoma is associated with the overexpression of mucin 2 (MUC2) and mucin 5AC (MUC5AC) proteins. At the same time, it shows higher mutation rates in the fundamental genes of the RAS/MAPK and PI3K/Akt/mTOR pathways. Mucinous colorectal adenocarcinoma also shows higher rates of microsatellite instability (MSI) than non-mucinous colorectal adenocarcinoma which might correlate it with Lynch syndrome and the CpG island methylator phenotype. The prognosis of mucinous colorectal adenocarcinoma as to non-mucinous colorectal adenocarcinoma is debatable. Further, the impaired responses of mucinous colorectal adenocarcinoma to palliative or adjuvant chemotherapy warrant more studies to be performed for a specialized treatment for these patients. In this review, we discuss the molecular background and histopathology of mucinous colorectal adenocarcinoma, and provide an update on its prognosis and therapeutics from recent literatures.
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Affiliation(s)
- Cong Luo
- Department of Abdominal Oncology, Zhejiang Cancer Hospital, Hangzhou, 310022, Zhejiang, P. R. China.
| | - Shuyi Cen
- School of Medicine, Zhejiang University, Hangzhou, 310058, Zhejiang, P. R. China
| | - Guojun Ding
- Department of Radiotherapy, Zhejiang Cancer Hospital, Hangzhou, 310022, Zhejiang, P. R. China
| | - Wei Wu
- Department of Pathology, Zhejiang Cancer Hospital, Hangzhou, 310022, Zhejiang, P. R. China
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17
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Abstract
Huntington's disease (HD) is an autosomal dominant neurodegenerative disorder caused by expanded polyglutamine (polyQ)-encoding repeats in the Huntingtin (HTT) gene. Traditionally, HD cellular models consisted of either patient cells not affected by disease or rodent neurons expressing expanded polyQ repeats in HTT. As these models can be limited in their disease manifestation or proper genetic context, respectively, human HD pluripotent stem cells (PSCs) are currently under investigation as a way to model disease in patient-derived neurons and other neural cell types. This chapter reviews embryonic stem cell (ESC) and induced pluripotent stem cell (iPSC) models of disease, including published differentiation paradigms for neurons and their associated phenotypes, as well as current challenges to the field such as validation of the PSCs and PSC-derived cells. Highlighted are potential future technical advances to HD PSC modeling, including transdifferentiation, complex in vitro multiorgan/system reconstruction, and personalized medicine. Using a human HD patient model of the central nervous system, hopefully one day researchers can tease out the consequences of mutant HTT (mHTT) expression on specific cell types within the brain in order to identify and test novel therapies for disease.
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18
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Relationships Between Meaning in Life, Dispositional Mindfulness, Perceived Stress, and Psychological Symptoms Among Chinese Patients With Gastrointestinal Cancer. J Nerv Ment Dis 2019; 207:34-37. [PMID: 30575706 DOI: 10.1097/nmd.0000000000000922] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This research examined the degree to which meaning in life explained the association between dispositional mindfulness and psychological symptoms. This was a survey research study with 292 patients with gastrointestinal cancer. Meaning in Life, dispositional mindfulness, psychological symptoms, and perceived stress were assessed. Results showed that consistent with theory and prior research, greater dispositional mindfulness was associated with less psychological symptoms and perceived stress. In addition, the results of the structural equation model verify that meaning in life mediates the association between dispositional mindfulness and perceived stress and psychological symptoms. Findings are consistent with logotheory and suggest that psychological symptoms may be reduced by addressing the impact of meaning in life.
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19
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Omole AE, Fakoya AOJ. Ten years of progress and promise of induced pluripotent stem cells: historical origins, characteristics, mechanisms, limitations, and potential applications. PeerJ 2018; 6:e4370. [PMID: 29770269 PMCID: PMC5951134 DOI: 10.7717/peerj.4370] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 01/24/2018] [Indexed: 12/11/2022] Open
Abstract
The discovery of induced pluripotent stem cells (iPSCs) by Shinya Yamanaka in 2006 was heralded as a major breakthrough of the decade in stem cell research. The ability to reprogram human somatic cells to a pluripotent embryonic stem cell-like state through the ectopic expression of a combination of embryonic transcription factors was greeted with great excitement by scientists and bioethicists. The reprogramming technology offers the opportunity to generate patient-specific stem cells for modeling human diseases, drug development and screening, and individualized regenerative cell therapy. However, fundamental questions have been raised regarding the molecular mechanism of iPSCs generation, a process still poorly understood by scientists. The efficiency of reprogramming of iPSCs remains low due to the effect of various barriers to reprogramming. There is also the risk of chromosomal instability and oncogenic transformation associated with the use of viral vectors, such as retrovirus and lentivirus, which deliver the reprogramming transcription factors by integration in the host cell genome. These challenges can hinder the therapeutic prospects and promise of iPSCs and their clinical applications. Consequently, extensive studies have been done to elucidate the molecular mechanism of reprogramming and novel strategies have been identified which help to improve the efficiency of reprogramming methods and overcome the safety concerns linked with iPSC generation. Distinct barriers and enhancers of reprogramming have been elucidated, and non-integrating reprogramming methods have been reported. Here, we summarize the progress and the recent advances that have been made over the last 10 years in the iPSC field, with emphasis on the molecular mechanism of reprogramming, strategies to improve the efficiency of reprogramming, characteristics and limitations of iPSCs, and the progress made in the applications of iPSCs in the field of disease modelling, drug discovery and regenerative medicine. Additionally, this study appraises the role of genomic editing technology in the generation of healthy iPSCs.
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Affiliation(s)
- Adekunle Ebenezer Omole
- Department of Basic Sciences, American University of Antigua College of Medicine, St. John's, Antigua
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20
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Combating Osteoarthritis through Stem Cell Therapies by Rejuvenating Cartilage: A Review. Stem Cells Int 2018; 2018:5421019. [PMID: 29765416 PMCID: PMC5885495 DOI: 10.1155/2018/5421019] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 02/05/2018] [Indexed: 12/13/2022] Open
Abstract
Knee osteoarthritis (OA) is a chronic degenerative disorder which could be distinguished by erosion of articular cartilage, pain, stiffness, and crepitus. Not only aging-associated alterations but also the metabolic factors such as hyperglycemia, dyslipidemia, and obesity affect articular tissues and may initiate or exacerbate the OA. The poor self-healing ability of articular cartilage due to limited regeneration in chondrocytes further adversely affects the osteoarthritic microenvironment. Traditional and current surgical treatment procedures for OA are limited and incapable to reverse the damage of articular cartilage. To overcome these limitations, cell-based therapies are currently being employed to repair and regenerate the structure and function of articular tissues. These therapies not only depend upon source and type of stem cells but also on environmental conditions, growth factors, and chemical and mechanical stimuli. Recently, the pluripotent and various multipotent mesenchymal stem cells have been employed for OA therapy, due to their differentiation potential towards chondrogenic lineage. Additionally, the stem cells have also been supplemented with growth factors to achieve higher healing response in osteoarthritic cartilage. In this review, we summarized the current status of stem cell therapies in OA pathophysiology and also highlighted the potential areas of further research needed in regenerative medicine.
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21
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Muranaka F, Nakajima T, Iwaya M, Ishii K, Higuchi K, Ogiwara N, Miyagawa S, Ota H. A Comparative Immunohistochemical Study of Anal Canal Epithelium in Humans and Swine, Focusing on the Anal Transitional Zone Epithelium and the Anal Glands. Anat Rec (Hoboken) 2017; 301:796-805. [PMID: 29232767 DOI: 10.1002/ar.23748] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 11/26/2017] [Accepted: 11/29/2017] [Indexed: 02/06/2023]
Abstract
To better understand the cellular origins and differentiation of anal canal epithelial neoplasms, the immunohistochemical profiles of the anal canal epithelium in humans and swine were evaluated. Formalin-fixed tissue sections were immunostained for mucin (MUC: MUC2, MUC5AC, MUC5B), desmoglein 3 (DGS3), p63, CDX2, SOX2, and α-smooth muscle actin (α-SMA). The anal transitional zone (ATZ) epithelium covered the anal sinus and consisted of a stratified epithelium with mucous cells interspersed within the surface lining. Anal glands opened into the anal sinus. Ducts and acini of intraepithelial or periepithelial mucous type were the main structures of human anal glands, whereas those of swine were compound tubuloacinar mixed glands. Distal to the ATZ epithelium, non-keratinized stratified squamous epithelium merged with the keratinized stratified squamous epithelium of the perianal skin. MUC5AC expression predominated over MUC5B expression in the ATZ epithelium, while MUC5B expression was higher in the anal glands. SOX2 was positive in the ATZ epithelium, anal glands, and squamous epithelium except in the perianal skin. In humans, DGS3 was expressed in the ATZ epithelium, anal gland ducts, and squamous epithelium. p63 was detected in the ATZ epithelium, anal glands, and squamous epithelium. Myoepithelial cells positive for α-SMA and p63 were present in the anal glands of swine. Colorectal columnar cells were MUC5B+ /MUC2+ /CDX2+ /MUC5AC- /SOX2- . The ATZ epithelium seems to be a distinctive epithelium, with morphological and functional features allowing smooth defecation. The MUC5AC+ /SOX2+ /MUC2- /CDX2- profile of the ATZ epithelium and anal glands is a useful feature for diagnosing adenocarcinoma arising from these regions. Anat Rec, 301:796-805, 2018. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Futoshi Muranaka
- Department of Surgery, Shinshu University Graduate School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Tomoyuki Nakajima
- Department of Laboratory Medicine, Shinshu University Hospital, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Mai Iwaya
- Department of Laboratory Medicine, Shinshu University School of Medicine, 3-3-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Keiko Ishii
- Department of Pathology, Okaya Municipal Hospital, 4-11-33 Honmachi, Okaya, Nagano, 394-8512, Japan
| | - Kayoko Higuchi
- Department of Clinical Laboratory, Aizawa Hospital, 2-5-1 Honjou, Matsumoto, 390-8510, Japan, Nagano
| | - Naoko Ogiwara
- Department of Laboratory Medicine, Shinshu University Hospital, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Shinichi Miyagawa
- Department of Surgery, Shinshu University Graduate School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Hiroyoshi Ota
- Department of Clinical Laboratory Sciences, School of Health Sciences, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
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22
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Yuan R, Zhang S, Yu J, Huang Y, Lu D, Cheng R, Huang S, Ao P, Zheng S, Hood L, Zhu X. Beyond cancer genes: colorectal cancer as robust intrinsic states formed by molecular interactions. Open Biol 2017; 7:rsob.170169. [PMID: 29118272 PMCID: PMC5717345 DOI: 10.1098/rsob.170169] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 10/06/2017] [Indexed: 02/06/2023] Open
Abstract
Colorectal cancer (CRC) has complex pathological features that defy the linear-additive reasoning prevailing in current biomedicine studies. In pursuing a mechanistic understanding behind such complexity, we constructed a core molecular–cellular interaction network underlying CRC and investigated its nonlinear dynamical properties. The hypothesis and modelling method has been developed previously and tested in various cancer studies. The network dynamics reveal a landscape of several attractive basins corresponding to both normal intestinal phenotype and robust tumour subtypes, identified by their different molecular signatures. Comparison between the modelling results and gene expression profiles from patients collected at the second affiliated hospital of Zhejiang University is presented as validation. The numerical ‘driving’ experiment suggests that CRC pathogenesis may depend on pathways involved in gastrointestinal track development and molecules associated with mesenchymal lineage differentiation, such as Stat5, BMP, retinoic acid signalling pathways, Runx and Hox transcription families. We show that the multi-faceted response to immune stimulation and therapies, as well as different carcinogenesis and metastasis routes, can be straightforwardly understood and analysed under such a framework.
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Affiliation(s)
- Ruoshi Yuan
- Key Laboratory of Systems Biomedicine, Ministry of Education, Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Suzhan Zhang
- Key Laboratory of Cancer Prevention and Intervention, Chinese Ministry of Education, Key Laboratory of Molecular Biology in Medical Sciences, Hangzhou, Zhejiang Province 310009, People's Republic of China.,Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, People's Republic of China
| | - Jiekai Yu
- Key Laboratory of Cancer Prevention and Intervention, Chinese Ministry of Education, Key Laboratory of Molecular Biology in Medical Sciences, Hangzhou, Zhejiang Province 310009, People's Republic of China.,Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, People's Republic of China
| | - Yanqin Huang
- Key Laboratory of Cancer Prevention and Intervention, Chinese Ministry of Education, Key Laboratory of Molecular Biology in Medical Sciences, Hangzhou, Zhejiang Province 310009, People's Republic of China.,Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, People's Republic of China
| | - Demin Lu
- Key Laboratory of Cancer Prevention and Intervention, Chinese Ministry of Education, Key Laboratory of Molecular Biology in Medical Sciences, Hangzhou, Zhejiang Province 310009, People's Republic of China.,Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, People's Republic of China
| | - Runtan Cheng
- Key Laboratory of Systems Biomedicine, Ministry of Education, Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Sui Huang
- Institute for Systems Biology, 401 Terry Ave. N., Seattle, WA 98109-5234, USA
| | - Ping Ao
- Key Laboratory of Systems Biomedicine, Ministry of Education, Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China .,Shanghai Center of Quantitative Life Sciences, Shanghai University, Shanghai 200444, People's Republic of China
| | - Shu Zheng
- Key Laboratory of Cancer Prevention and Intervention, Chinese Ministry of Education, Key Laboratory of Molecular Biology in Medical Sciences, Hangzhou, Zhejiang Province 310009, People's Republic of China.,Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, People's Republic of China
| | - Leroy Hood
- Institute for Systems Biology, 401 Terry Ave. N., Seattle, WA 98109-5234, USA
| | - Xiaomei Zhu
- Key Laboratory of Systems Biomedicine, Ministry of Education, Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China .,Shanghai Center of Quantitative Life Sciences, Shanghai University, Shanghai 200444, People's Republic of China
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23
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Nicolas CT, Hickey RD, Chen HS, Mao SA, Lopera Higuita M, Wang Y, Nyberg SL. Concise Review: Liver Regenerative Medicine: From Hepatocyte Transplantation to Bioartificial Livers and Bioengineered Grafts. Stem Cells 2017; 35:42-50. [PMID: 27641427 PMCID: PMC5529050 DOI: 10.1002/stem.2500] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 07/27/2016] [Accepted: 08/21/2016] [Indexed: 12/13/2022]
Abstract
Donor organ shortage is the main limitation to liver transplantation as a treatment for end-stage liver disease and acute liver failure. Liver regenerative medicine may in the future offer an alternative form of therapy for these diseases, be it through cell transplantation, bioartificial liver (BAL) devices, or bioengineered whole organ liver transplantation. All three strategies have shown promising results in the past decade. However, before they are incorporated into widespread clinical practice, the ideal cell type for each treatment modality must be found, and an adequate amount of metabolically active, functional cells must be able to be produced. Research is ongoing in hepatocyte expansion techniques, use of xenogeneic cells, and differentiation of stem cell-derived hepatocyte-like cells (HLCs). HLCs are a few steps away from clinical application, but may be very useful in individualized drug development and toxicity testing, as well as disease modeling. Finally, safety concerns including tumorigenicity and xenozoonosis must also be addressed before cell transplantation, BAL devices, and bioengineered livers occupy their clinical niche. This review aims to highlight the most recent advances and provide an updated view of the current state of affairs in the field of liver regenerative medicine. Stem Cells 2017;35:42-50.
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Affiliation(s)
- Clara T Nicolas
- William J Von Liebig Transplant Center, Mayo Clinic, Rochester, Minnesota, USA
- Department of Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Raymond D Hickey
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, USA
- Department of Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Harvey S Chen
- Department of Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Shennen A Mao
- Department of Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Manuela Lopera Higuita
- Department of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Yujia Wang
- William J Von Liebig Transplant Center, Mayo Clinic, Rochester, Minnesota, USA
| | - Scott L Nyberg
- William J Von Liebig Transplant Center, Mayo Clinic, Rochester, Minnesota, USA
- Department of Surgery, Mayo Clinic, Rochester, Minnesota, USA
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Khaidakov M, Lai KK, Roudachevski D, Sargsyan J, Goyne HE, Pai RK, Lamps LW, Hagedorn CH. Gastric Proteins MUC5AC and TFF1 as Potential Diagnostic Markers of Colonic Sessile Serrated Adenomas/Polyps. Am J Clin Pathol 2016; 146:530-537. [PMID: 28430953 PMCID: PMC5377921 DOI: 10.1093/ajcp/aqw142] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVES A subset of colon cancers originates from sessile serrated adenomas/polyps (SSA/Ps). Our goal was to identify markers for SSA/Ps that could aid in distinguishing them from hyperplastic polyps (HPs). METHODS We performed immunostaining for gastric proteins MUC5AC and TFF1 in formalin-fixed, paraffin-embedded (FFPE) samples of HPs (n = 47), SSA/Ps (n = 37), and normal colon (n = 30). RESULTS Control mucosa expressed only trace amounts of MUC5AC and TFF1. HPs exhibited an 11.3- and 11.4-fold increase in MUC5AC and TFF1 expression confined to the upper segments of the crypts near the luminal surface of the polyps. SSA/Ps displayed on average 1.6-fold (MUC5AC, P < .008) and 1.4-fold (TFF1, P < .03) higher signal intensity for these markers than HPs, with a dramatic coexpression of MUC5AC and TFF1 typically occupying the entire length of the crypt. Immunoperoxidase results were similar to immunofluorescence staining for both MUC5AC and TFF1. CONCLUSIONS Our results suggest that the analysis of expression of MUC5AC and TFF1 may be useful for differentiating SSA/Ps from HPs. We also suggest the possibility that crypt morphology may be at least partly due to overproduction of highly viscous gastric mucins and that these proteins may play a role in the serrated pathway to colon carcinogenesis.
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Affiliation(s)
- Magomed Khaidakov
- From the Department of Medicine
- Central Arkansas Veterans Healthcare System, Little Rock
| | - Keith K. Lai
- Department of Pathology, University of Arkansas for Medical Sciences, Little Rock
| | | | | | - Hannah E. Goyne
- Department of Pathology, University of Arkansas for Medical Sciences, Little Rock
| | - Rish K. Pai
- Department of Pathology, Mayo Clinic, Scottsdale, AZ
| | - Laura W. Lamps
- Department of Pathology, University of Arkansas for Medical Sciences, Little Rock
| | - Curt H. Hagedorn
- From the Department of Medicine
- Central Arkansas Veterans Healthcare System, Little Rock
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Vallam KC, Desouza A, Bal M, Patil P, Engineer R, Saklani A. Adenocarcinoma of the Rectum-A Composite of Three Different Subtypes With Varying Outcomes? Clin Colorectal Cancer 2016; 15:e47-52. [PMID: 26778645 DOI: 10.1016/j.clcc.2015.12.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 12/05/2015] [Accepted: 12/09/2015] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Adenocarcinoma of the rectum has been classified by the World Health Organization into various histologic subtypes. We analyzed the effect of the histologic subtype (classic, signet ring cell, and mucinous) on the clinical outcomes of patients with rectal cancer. We hypothesized that clinicopathologic outcome measures such as tumor margins, tumor regression grade, recurrence rate, and survival would vary with the histologic subtype. MATERIALS AND METHODS We conducted a retrospective analysis of a prospectively maintained database. All patients with stage I-III rectal adenocarcinoma were included. RESULTS From May 2010 to August 2013, 273 patients underwent curative resection. Both mucin-secreting variants were more common in younger patients and presented at a more advanced stage. Also, 54% and 48% of those with signet ring cell carcinoma (SRCC) and mucinous adenocarcinoma (MAC) had node-positive disease compared with the rate in the classic variant (30%). Circumferential resection margin positivity was 24% with MAC and 19% with SRCC compared with 4% with the classic variant. Disease-free survival for those with the classic and mucinous variants was 38.5 and 37.4 months, respectively. In contrast, it was 28.6 months in the SRCC group. The overall survival did not differ significantly. CONCLUSION Rectal adenocarcinoma presents as a spectrum of disease, with progressively worsening outcomes from classic to MAC to SRCC. These aggressive variants might warrant more aggressive resection. These data from the Indian subcontinent differ from the published data from Western countries.
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Affiliation(s)
| | - Ashwin Desouza
- Department of Gastrointestinal Surgical Oncology, Tata Memorial Centre, Mumbai, India
| | - Munita Bal
- Department of Pathology, Tata Memorial Centre, Mumbai, India
| | - Prachi Patil
- Department of Digestive Diseases and Clinical Nutrition, Tata Memorial Centre, Mumbai, India
| | - Reena Engineer
- Department of Radiation Oncology, Tata Memorial Centre, Mumbai, India
| | - Avanish Saklani
- Department of Gastrointestinal Oncology, Tata Memorial Centre, Mumbai, India.
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Li S, Zhu X, Liu B, Wang G, Ao P. Endogenous molecular network reveals two mechanisms of heterogeneity within gastric cancer. Oncotarget 2016; 6:13607-27. [PMID: 25962957 PMCID: PMC4537037 DOI: 10.18632/oncotarget.3633] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 04/10/2015] [Indexed: 12/20/2022] Open
Abstract
Intratumor heterogeneity is a common phenomenon and impedes cancer therapy and research. Gastric cancer (GC) cells have generally been classified into two heterogeneous cellular phenotypes, the gastric and intestinal types, yet the mechanisms of maintaining two phenotypes and controlling phenotypic transition are largely unknown. A qualitative systematic framework, the endogenous molecular network hypothesis, has recently been proposed to understand cancer genesis and progression. Here, a minimal network corresponding to such framework was found for GC and was quantified via a stochastic nonlinear dynamical system. We then further extended the framework to address the important question of intratumor heterogeneity quantitatively. The working network characterized main known features of normal gastric epithelial and GC cell phenotypes. Our results demonstrated that four positive feedback loops in the network are critical for GC cell phenotypes. Moreover, two mechanisms that contribute to GC cell heterogeneity were identified: particular positive feedback loops are responsible for the maintenance of intestinal and gastric phenotypes; GC cell progression routes that were revealed by the dynamical behaviors of individual key components are heterogeneous. In this work, we constructed an endogenous molecular network of GC that can be expanded in the future and would broaden the known mechanisms of intratumor heterogeneity.
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Affiliation(s)
- Site Li
- Shanghai Center for Systems Biomedicine, Ministry of Education Key Laboratory of Systems Biomedicine, Collaborative Innovation Center of Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | | | - Bingya Liu
- Shanghai Center for Systems Biomedicine, Ministry of Education Key Laboratory of Systems Biomedicine, Collaborative Innovation Center of Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, China.,Shanghai Key Laboratory of Gastric Neoplasms, Shanghai Institute of Digestive Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Gaowei Wang
- Shanghai Center for Systems Biomedicine, Ministry of Education Key Laboratory of Systems Biomedicine, Collaborative Innovation Center of Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ping Ao
- Shanghai Center for Systems Biomedicine, Ministry of Education Key Laboratory of Systems Biomedicine, Collaborative Innovation Center of Systems Biomedicine, Shanghai Jiao Tong University, Shanghai 200240, China.,State Key Laboratory for Oncogenes and Related Genes, Shanghai Cancer Institute, Shanghai Jiao Tong University School of Medicine, Shanghai 200032, China.,Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China
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Inagaki-Ohara K, Okamoto S, Takagi K, Saito K, Arita S, Tang L, Hori T, Kataoka H, Matsumoto S, Minokoshi Y. Leptin receptor signaling is required for high-fat diet-induced atrophic gastritis in mice. Nutr Metab (Lond) 2016; 13:7. [PMID: 26839577 PMCID: PMC4736478 DOI: 10.1186/s12986-016-0066-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 01/26/2016] [Indexed: 12/25/2022] Open
Abstract
Background Obesity increases the risk for malignancies in various tissues including the stomach. Atrophic gastritis with precancerous lesions is an obesity-associated disease; however, the mechanisms that underlie the development of obesity-associated atrophic gastritis are unknown. Leptin is a hormone derived from stomach as well as adipose tissue and gastric leptin is involved in the development of gastric cancer. The aim of the current study is to investigate the involvement of leptin receptor signaling in the development of atrophic gastritis during diet-induced obesity. Methods Male C57BL/6, ob/ob and db/db mice were fed a high-fat diet (HFD) or a control diet (CD) from 1 week to 5 months. Pathological changes of the gastric mucosa and the expression of molecules associated with atrophic gastritis were evaluated in these mice. Results HFD feeding induced gastric mucosal hyperplasia with increased gastric leptin expression. Mucosal hyperplasia was accompanied by a higher frequency of Ki67-positive proliferating cells and atrophy of the gastric glands in the presence of inflammation, which increased following HFD feeding. Activation of ObR signaling-associated molecules such as ObR, STAT3, Akt, and ERK was detected in the gastric mucosa of mice fed the HFD for 1 week. The morphological alterations associated with gastric mucosal atrophy and the expression of Muc2 and Cdx2 resemble those associated with human intestinal metaplasia. In contrast to wild-type mice, leptin-deficient ob/ob mice and leptin receptor-mutated db/db mice did not show increased Cdx2 expression in response to HFD feeding. Conclusion Together, these results suggest that activation of the leptin signaling pathway in the stomach is required to develop obesity-associated atrophic gastritis. Electronic supplementary material The online version of this article (doi:10.1186/s12986-016-0066-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kyoko Inagaki-Ohara
- Research Institute, National Center for Global Health and Medicine (NCGM), 1-21-1, Toyama Shinjuku, Tokyo, 162-0052 Japan ; Division of Endocrinology and Metabolism, Department of Developmental Physiology, National Institute for Physiological Sciences (NIPS), 38 Nishigonaka Myodaiji, Okazaki, Aichi 444-8585 Japan ; Division of Host Defense, Department of Life Sciences, Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, 562 Nanatsuka, Shobara, Hiroshima 727-0023 Japan
| | - Shiki Okamoto
- Division of Endocrinology and Metabolism, Department of Developmental Physiology, National Institute for Physiological Sciences (NIPS), 38 Nishigonaka Myodaiji, Okazaki, Aichi 444-8585 Japan
| | - Kazuyo Takagi
- Division of Endocrinology and Metabolism, Department of Developmental Physiology, National Institute for Physiological Sciences (NIPS), 38 Nishigonaka Myodaiji, Okazaki, Aichi 444-8585 Japan
| | - Kumiko Saito
- Division of Endocrinology and Metabolism, Department of Developmental Physiology, National Institute for Physiological Sciences (NIPS), 38 Nishigonaka Myodaiji, Okazaki, Aichi 444-8585 Japan
| | - Seiya Arita
- Division of Host Defense, Department of Life Sciences, Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, 562 Nanatsuka, Shobara, Hiroshima 727-0023 Japan
| | - Lijun Tang
- Division of Endocrinology and Metabolism, Department of Developmental Physiology, National Institute for Physiological Sciences (NIPS), 38 Nishigonaka Myodaiji, Okazaki, Aichi 444-8585 Japan
| | - Tetsuji Hori
- Yakult Central Institute for Microbiological Research, 5-11 Izumi, Kunitachi, Tokyo, 186-8650 Japan
| | - Hiroaki Kataoka
- Section of Oncopathology and Regenerative Biology, Department of Pathology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692 Japan
| | - Satoshi Matsumoto
- Yakult Central Institute for Microbiological Research, 5-11 Izumi, Kunitachi, Tokyo, 186-8650 Japan
| | - Yasuhiko Minokoshi
- Division of Endocrinology and Metabolism, Department of Developmental Physiology, National Institute for Physiological Sciences (NIPS), 38 Nishigonaka Myodaiji, Okazaki, Aichi 444-8585 Japan
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Mihalache A, Delplanque JF, Ringot-Destrez B, Wavelet C, Gosset P, Nunes B, Groux-Degroote S, Léonard R, Robbe-Masselot C. Structural Characterization of Mucin O-Glycosylation May Provide Important Information to Help Prevent Colorectal Tumor Recurrence. Front Oncol 2015; 5:217. [PMID: 26500890 PMCID: PMC4597131 DOI: 10.3389/fonc.2015.00217] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 09/22/2015] [Indexed: 12/18/2022] Open
Abstract
Although colorectal cancer is a preventable and curable disease if early stage tumors are removed, it still represents the second cause of cancer-related death worldwide. Surgical resection is the only curative treatment but once operated the patient is either subjected to adjuvant chemotherapy or not, depending on the invasiveness of the cancer and risks of recurrence. In this context, we investigated, by mass spectrometry (MS), alterations in the repertoire of glycosylation of mucins from colorectal tumors of various stages, grades, and recurrence status. Tumors were also compared with their counterparts in resection margins from the same patients and with healthy controls. The obtained data showed an important decrease in the level of expression of sialylated core 3-based O-glycans in tumors correlated with an increase in sialylated core 1 structures. No correlation was established between stages of the tumor samples and mucin O-glycosylation. However, with the notable exception of sialyl Tn antigens, tumors with recurrence presented a milder alteration of glycosylation profile than tumors without recurrence. These results suggest that mucin O-glycans from tumors with recurrence might mimic a healthier physiological situation, hence deceiving the immune defense system.
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Affiliation(s)
- Adriana Mihalache
- Structural and Functional Glycobiology Unit, UMR CNRS 8576, University of Lille , Villeneuve d'Ascq , France ; Service d'Anatomie Pathologie, Faculté Libre de Médecine, Hôpital Saint Vincent de Paul, Groupement des Hôpitaux de l'Institut Catholique de Lille , Lille , France
| | - Jean-François Delplanque
- Structural and Functional Glycobiology Unit, UMR CNRS 8576, University of Lille , Villeneuve d'Ascq , France
| | - Bélinda Ringot-Destrez
- Structural and Functional Glycobiology Unit, UMR CNRS 8576, University of Lille , Villeneuve d'Ascq , France
| | - Cindy Wavelet
- Structural and Functional Glycobiology Unit, UMR CNRS 8576, University of Lille , Villeneuve d'Ascq , France
| | - Pierre Gosset
- Service d'Anatomie Pathologie, Faculté Libre de Médecine, Hôpital Saint Vincent de Paul, Groupement des Hôpitaux de l'Institut Catholique de Lille , Lille , France
| | - Bertrand Nunes
- Service Chirurgie Digestive, Faculté Libre de Médecine, Hôpital Saint Philibert, Groupement des Hôpitaux de l'Institut Catholique de Lille , Lille , France
| | - Sophie Groux-Degroote
- Structural and Functional Glycobiology Unit, UMR CNRS 8576, University of Lille , Villeneuve d'Ascq , France
| | - Renaud Léonard
- Structural and Functional Glycobiology Unit, UMR CNRS 8576, University of Lille , Villeneuve d'Ascq , France
| | - Catherine Robbe-Masselot
- Structural and Functional Glycobiology Unit, UMR CNRS 8576, University of Lille , Villeneuve d'Ascq , France
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Oue N, Sentani K, Sakamoto N, Yasui W. Clinicopathologic and molecular characteristics of gastric cancer showing gastric and intestinal mucin phenotype. Cancer Sci 2015; 106:951-8. [PMID: 26033320 PMCID: PMC4556382 DOI: 10.1111/cas.12706] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 05/19/2015] [Accepted: 05/25/2015] [Indexed: 12/12/2022] Open
Abstract
Gastric cancer (GC), one of the most common human cancers, can be classified into gastric or intestinal phenotype according to mucin expression. TP53 mutation, allelic deletion of the APC gene and nuclear staining of β-catenin are frequently detected in the intestinal phenotype of GC, whereas CDH1 gene mutation, microsatellite instability and DNA hypermethylation of MLH1 are common events in the gastric phenotype of GC. Our Serial Analysis of Gene Expression (SAGE) and Escherichia coli ampicillin secretion trap (CAST) analyses revealed that CDH17, REG4, OLFM4, HOXA10, DSC2, TSPAN8 and TM9SF3 are upregulated in GC and that CLDN18 is downregulated in GC. Expression of CDH17, REG4, HOXA10 and DSC2 and downregulation of CLDN18 are observed in the intestinal phenotype of GC. In contrast, OLFM4 is expressed in the gastric phenotype of GC. Expression of TSPAN8, TM9SF3 and HER2 are not associated with either gastric or intestinal phenotypes. Ectopic CDX2 expression plays a key function in the GC intestinal phenotype. MUC2, CDH17, REG4, DSC2 and ABCB1 are direct targets of CDX2. Importantly, these genes encode transmembrane/secretory proteins, indicating that the microenvironment as well as cancer cells are also different between gastric and intestinal phenotypes of GC.
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Affiliation(s)
- Naohide Oue
- Department of Molecular Pathology, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kazuhiro Sentani
- Department of Molecular Pathology, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Naoya Sakamoto
- Department of Molecular Pathology, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Wataru Yasui
- Department of Molecular Pathology, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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30
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Inamura K, Yamauchi M, Nishihara R, Kim SA, Mima K, Sukawa Y, Li T, Yasunari M, Zhang X, Wu K, Meyerhardt JA, Fuchs CS, Harris CC, Qian ZR, Ogino S. Prognostic significance and molecular features of signet-ring cell and mucinous components in colorectal carcinoma. Ann Surg Oncol 2015; 22:1226-1235. [PMID: 25326395 PMCID: PMC4346446 DOI: 10.1245/s10434-014-4159-7] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Indexed: 12/11/2022]
Abstract
BACKGROUND Colorectal carcinoma (CRC) represents a group of histopathologically and molecularly heterogeneous diseases, which may contain signet-ring cell component and/or mucinous component to a varying extent under pathology assessment. However, little is known about the prognostic significance of those components, independent of various tumor molecular features. METHODS Utilizing a molecular pathological epidemiology database of 1,336 rectal and colon cancers in the Nurses' Health Study and the Health Professionals Follow-up Study, we examined patient survival according to the proportion of signet-ring cell and mucinous components in CRCs. Cox proportional hazards models were used to compute hazard ratio (HR) for mortality, adjusting for potential confounders including stage, microsatellite instability, CpG island methylator phenotype, LINE-1 methylation, and KRAS, BRAF, and PIK3CA mutations. RESULTS Compared to CRC without signet-ring cell component, 1-50 % signet-ring cell component was associated with multivariate CRC-specific mortality HR of 1.40 [95 % confidence interval (CI) 1.02-1.93], and >50 % signet-ring cell component was associated with multivariate CRC-specific mortality HR of 4.53 (95 % CI 2.53-8.12) (P trend < 0.0001). Compared to CRC without mucinous component, neither 1-50 % mucinous component (multivariate HR 1.04; 95 % CI 0.81-1.33) nor >50 % mucinous component (multivariate HR 0.82; 95 % CI 0.54-1.23) was significantly associated with CRC-specific mortality (P trend < 0.57). CONCLUSIONS Even a minor (50 % or less) signet-ring cell component in CRC was associated with higher patient mortality, independent of various tumor molecular and other clinicopathological features. In contrast, mucinous component was not associated with mortality in CRC patients.
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Affiliation(s)
- Kentaro Inamura
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA
- Laboratory of Human Carcinogenesis, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Mai Yamauchi
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA
| | - Reiko Nishihara
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA
- Department of Nutrition, Harvard School of Public Health, Boston, MA
| | - Sun A Kim
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA
| | - Kosuke Mima
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA
| | - Yasutaka Sukawa
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA
| | - Tingting Li
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA
- Department of Geriatric Gastroenterology, Chinese PLA General Hospital, Beijing, China
| | - Mika Yasunari
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA
| | - Xuehong Zhang
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA
| | - Kana Wu
- Department of Nutrition, Harvard School of Public Health, Boston, MA
| | - Jeffrey A Meyerhardt
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA
| | - Charles S Fuchs
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA
| | - Curtis C Harris
- Laboratory of Human Carcinogenesis, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - Zhi Rong Qian
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA
| | - Shuji Ogino
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA
- Department of Epidemiology, Harvard School of Public Health, Boston, MA
- Department of Pathology, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA
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Singh VK, Kalsan M, Kumar N, Saini A, Chandra R. Induced pluripotent stem cells: applications in regenerative medicine, disease modeling, and drug discovery. Front Cell Dev Biol 2015; 3:2. [PMID: 25699255 PMCID: PMC4313779 DOI: 10.3389/fcell.2015.00002] [Citation(s) in RCA: 243] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Accepted: 01/06/2015] [Indexed: 12/12/2022] Open
Abstract
Recent progresses in the field of Induced Pluripotent Stem Cells (iPSCs) have opened up many gateways for the research in therapeutics. iPSCs are the cells which are reprogrammed from somatic cells using different transcription factors. iPSCs possess unique properties of self renewal and differentiation to many types of cell lineage. Hence could replace the use of embryonic stem cells (ESC), and may overcome the various ethical issues regarding the use of embryos in research and clinics. Overwhelming responses prompted worldwide by a large number of researchers about the use of iPSCs evoked a large number of peple to establish more authentic methods for iPSC generation. This would require understanding the underlying mechanism in a detailed manner. There have been a large number of reports showing potential role of different molecules as putative regulators of iPSC generating methods. The molecular mechanisms that play role in reprogramming to generate iPSCs from different types of somatic cell sources involves a plethora of molecules including miRNAs, DNA modifying agents (viz. DNA methyl transferases), NANOG, etc. While promising a number of important roles in various clinical/research studies, iPSCs could also be of great use in studying molecular mechanism of many diseases. There are various diseases that have been modeled by uing iPSCs for better understanding of their etiology which maybe further utilized for developing putative treatments for these diseases. In addition, iPSCs are used for the production of patient-specific cells which can be transplanted to the site of injury or the site of tissue degeneration due to various disease conditions. The use of iPSCs may eliminate the chances of immune rejection as patient specific cells may be used for transplantation in various engraftment processes. Moreover, iPSC technology has been employed in various diseases for disease modeling and gene therapy. The technique offers benefits over other similar techniques such as animal models. Many toxic compounds (different chemical compounds, pharmaceutical drugs, other hazardous chemicals, or environmental conditions) which are encountered by humans and newly designed drugs may be evaluated for toxicity and effects by using iPSCs. Thus, the applications of iPSCs in regenerative medicine, disease modeling, and drug discovery are enormous and should be explored in a more comprehensive manner.
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Affiliation(s)
- Vimal K Singh
- INSPIRE Faculty, Stem Cell Research Laboratory, Department of Biotechnology, Delhi Technological University Delhi, India
| | - Manisha Kalsan
- Stem Cell Research Laboratory, Department of Biotechnology, Delhi Technological University Delhi, India
| | - Neeraj Kumar
- Stem Cell Research Laboratory, Department of Biotechnology, Delhi Technological University Delhi, India
| | - Abhishek Saini
- Stem Cell Research Laboratory, Department of Biotechnology, Delhi Technological University Delhi, India
| | - Ramesh Chandra
- B. R. Ambedkar Centre for Biomedical Research, University of Delhi Delhi, India
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Renaud F, Vincent A, Mariette C, Crépin M, Stechly L, Truant S, Copin MC, Porchet N, Leteurtre E, Van Seuningen I, Buisine MP. MUC5AC hypomethylation is a predictor of microsatellite instability independently of clinical factors associated with colorectal cancer. Int J Cancer 2014; 136:2811-21. [PMID: 25403854 DOI: 10.1002/ijc.29342] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 11/03/2014] [Indexed: 12/12/2022]
Abstract
Colorectal cancers (CRC) with microsatellite instability (MSI) display unique clinicopathologic features including a mucinous pattern with frequent expression of the secreted mucins MUC2 and MUC5AC. The mechanisms responsible for this altered pattern of expression remain largely unknown. We quantified DNA methylation of mucin genes (MUC2, MUC5AC, MUC4) in colonic cancers and examined the association with clinicopathological characteristics and molecular (MSI, KRAS, BRAF, and TP53 mutations) features. A control cohort was used for validation. We detected frequent hypomethylation of MUC2 and MUC5AC in CRC. MUC2 and MUC5AC hypomethylation was associated with MUC2 and MUC5AC protein expression (p = 0.004 and p < 0.001, respectively), poor differentiation (p = 0.001 and p = 0.007, respectively) and MSI status (p < 0.01 and p < 0.001, respectively). Interestingly, MUC5AC hypomethylation was specific to MSI cancers. Moreover, it was significantly associated with BRAF mutation and CpG island methylator phenotype (p < 0.001 and p < 0.001, respectively). All these results were confirmed in the control cohort. In the multivariate analysis, MUC5AC hypomethylation was a highly predictive biomarker for MSI cancers. MUC5AC demethylation appears to be a hallmark of MSI in CRC. Determination of MUC5AC methylation status may be useful for understanding and predicting the natural history of CRC.
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Affiliation(s)
- Florence Renaud
- Inserm, UMR837, Team 5 "Mucins, Epithelial Differentiation and Carcinogenesis," Jean-Pierre Aubert Research Center, Lille, France; Pathology Institute, Biology Pathology Center, Lille University Hospital, Lille, France; North of France University, Lille, France
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Camilo V, Garrido M, Valente P, Ricardo S, Amaral AL, Barros R, Chaves P, Carneiro F, David L, Almeida R. Differentiation reprogramming in gastric intestinal metaplasia and dysplasia: role of SOX2 and CDX2. Histopathology 2014; 66:343-50. [PMID: 25196071 DOI: 10.1111/his.12544] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 08/31/2014] [Indexed: 12/12/2022]
Abstract
AIMS Intestinal metaplasia (IM), which results from de-novo expression of CDX2, and dysplasia are precursor lesions of gastric cancer that are associated with an increased risk for cancer development. There is much evidence suggesting a role for the transcription factor SOX2 in gastric differentiation. The aim of this study was to attempt to establish the relationship of SOX2 with CDX2 and with the differentiation reprogramming that characterizes gastric carcinogenesis, to assess their involvement in IM and dysplasia. METHODS AND RESULTS Characterization of gastric (SOX2, MUC5AC, and MUC6) and intestinal (CDX2 and MUC2) markers in normal gastric mucosa, in 55 foci of IM and in 26 foci of dysplasia, was performed by immunohistochemistry. SOX2 was expressed in the normal gastric mucosa, in the presumptive stem cell compartment, and was maintained in 7% of the complete (MUC5AC-negative) and 85% of the incomplete (MUC5AC-positive) IM subtypes. Twelve per cent of the dysplastic lesions expressed SOX2, and the association with MUC5AC was lost. CDX2 was present in all IMs and dysplastic lesions. CONCLUSIONS SOX2 is associated with gastric differentiation in incomplete IM and is lost in the progression to dysplasia, whereas CDX2 is acquired de novo in IM and maintained in dysplasia. This suggests that the balance between gastric and intestinal differentiation programmes impacts on the gastric carcinogenesis cascade progression.
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Affiliation(s)
- Vânia Camilo
- Institute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), Porto, Portugal
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Raghoebir L, Biermann K, Kempen MBV, Dubbink HJ, Dinjens WNM, Hersmus R, Looijenga LHJ, Bruno MJ, Tibboel D, Rottier RJ, Smits R. Aberrant SOX2 expression in colorectal cancers does not correlate with mucinous differentiation and gastric mucin MUC5AC expression. Virchows Arch 2014; 465:395-400. [PMID: 25108707 DOI: 10.1007/s00428-014-1638-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 08/01/2014] [Accepted: 08/03/2014] [Indexed: 01/10/2023]
Abstract
Colorectal cancer (CRC) can be divided into non-mucinous and mucinous subtypes, of which the latter portends to have a worse clinical prognosis. A previous study suggested a putative link between SOX2 expression observed selectively in mucinous CRC and the induction of the gastric mucin MUC5AC. In this study, we re-evaluated the expression behavior of SOX2, MUC5AC, and CDX2 in both types of CRC. We performed immunohistochemical analysis on 90 cases of non-mucinous CRCs, 57 cases of mucinous CRCs, and 15 case-matched normal intestinal mucosa. In contrast to the previously suggested link between SOX2 and mucinous CRC, we observe aberrant expression of SOX2 at equal levels in both subtypes. Fluorescence in situ hybridization (FISH) analysis shows that expression is not attributed to genomic amplification. While SOX2 and CDX2 are normally expressed in a reciprocal manner, SOX2-positive tumor cells co-express CDX2. Furthermore, we show that MUC5AC is expressed independently of SOX2. In conclusion, we show that aberrant SOX2 expression is specifically linked neither to mucinous CRCs nor to the induction of MUC5AC, in contrast to previous suggestions.
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Affiliation(s)
- Lalini Raghoebir
- Department of Pediatric Surgery, Erasmus Medical Centre, Rotterdam, The Netherlands
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Lundberg IV, Löfgren Burström A, Edin S, Eklöf V, Öberg Å, Stenling R, Palmqvist R, Wikberg ML. SOX2 expression is regulated by BRAF and contributes to poor patient prognosis in colorectal cancer. PLoS One 2014; 9:e101957. [PMID: 25010701 PMCID: PMC4092103 DOI: 10.1371/journal.pone.0101957] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 06/12/2014] [Indexed: 12/17/2022] Open
Abstract
Sporadic colorectal cancer (CRC) is a common malignancy and also one of the main causes of cancer deaths worldwide. Aberrant expression of the transcription factor SOX2 has recently been observed in several cancer types, but its role in CRC has not been fully elucidated. Here we studied the expression of SOX2 in 441 CRC patients by immunohistochemistry and related the expression to clinicopathological and molecular variables and patient prognosis. SOX2 was expressed in 11% of the tumors and was significantly associated to BRAFV600E mutation, but not to KRAS mutations (codon 12 and 13). SOX2 positivity was correlated to poor patient survival, especially in BRAFV600E mutated cases. In vitro studies showed that cells expressing the constitutively active BRAFV600E had increased SOX2 expression, a finding not found in cells expressing KRASG12V. Furthermore, blocking downstream BRAF signalling using a MEK-inhibitor resulted in a decreased expression of SOX2. Since SOX2 overexpression has been correlated to increased migration and invasion, we investigated the SOX2 expression in human CRC liver metastasis and found that a SOX2 positive primary CRC also had SOX2 expression in corresponding liver metastases. Finally we found that cells overexpressing SOX2 in vitro showed enhanced expression of FGFR1, which has been reported to correlate with liver metastasis in CRC. Our novel findings suggest that SOX2 expression is partly regulated by BRAF signalling, and an increased SOX2 expression may promote CRC metastasis and mediate a poor patient prognosis.
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Affiliation(s)
- Ida V. Lundberg
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
| | | | - Sofia Edin
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
| | - Vincy Eklöf
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
| | - Åke Öberg
- Department of Surgical and Perioperative Sciences, Surgery, Umeå University, Umeå, Sweden
| | - Roger Stenling
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
| | - Richard Palmqvist
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
| | - Maria L. Wikberg
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
- * E-mail:
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Cobler L, Pera M, Garrido M, Iglesias M, de Bolós C. CDX2 can be regulated through the signalling pathways activated by IL-6 in gastric cells. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2014; 1839:785-92. [PMID: 24953186 DOI: 10.1016/j.bbagrm.2014.06.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 05/29/2014] [Accepted: 06/12/2014] [Indexed: 12/30/2022]
Abstract
The inflammatory infiltrate of the gastric mucosa associated with Helicobacter pylori infection increases the presence of the pro-inflammatory cytokine IL-6 that activates both the SHP-2/ERK/MAPK and the JAK/STAT signalling pathways. Furthermore, the ectopic expression of CDX2 is detected in pre-neoplasic lesions associated with decreased levels of SOX2, and we found that in gastric adenocarcinomas their expression is inversely correlated. To determine the role of IL-6 in the regulation of CDX2, MKN45 that constitutively expresses p-STAT3, and NUGC-4 gastric cancer cell lines were treated with IL-6, which induced the CDX2 up-regulation and SOX2 down-regulation. ChIP assays determined that in IL-6-treated cells, c-JUN and p-STAT3 bound to CDX2 promoter in MKN45 cells whereas in NUGC-4 cells, p-STAT3 binds to and c-JUN releases from the CDX2 promoter. Specific inhibition of STAT3 and ERK1/2 phosphorylation through AG490 and U0126, respectively, and STAT3 down-regulation using shRNA verified that the SHP-2/ERK/MAPK pathway regulates the expression of CDX2 in basal conditions, and the CDX2 up-regulation by IL-6 is through the JAK/STAT pathway in NUGC-4 cells whereas in MKN45 cells both pathways contribute to the CDX2 up-regulation. In conclusion, the signalling pathways activated by IL-6 have a crucial role in the regulation of CDX2 that is a key factor in the process of gastric carcinogenesis, suggesting that the inflammatory infiltrate in the gastric mucosa is relevant in this process and a potential target for new therapeutic approaches.
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Affiliation(s)
- Lara Cobler
- Gastroesophageal Cancer Research Group, Programa de Recerca en Càncer, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Dr. Aiguader, 88, 08003 Barcelona, Spain
| | - Manuel Pera
- Gastroesophageal Cancer Research Group, Programa de Recerca en Càncer, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Dr. Aiguader, 88, 08003 Barcelona, Spain
| | - Marta Garrido
- Gastroesophageal Cancer Research Group, Programa de Recerca en Càncer, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Dr. Aiguader, 88, 08003 Barcelona, Spain
| | - Mar Iglesias
- Gastroesophageal Cancer Research Group, Programa de Recerca en Càncer, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Dr. Aiguader, 88, 08003 Barcelona, Spain
| | - Carme de Bolós
- Gastroesophageal Cancer Research Group, Programa de Recerca en Càncer, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Dr. Aiguader, 88, 08003 Barcelona, Spain.
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Sun D, Qin L, Xu Y, Liu JX, Tian LP, Qian HX. Influence of adriamycin on changes in Nanog, Oct-4, Sox2, ARID1 and Wnt5b expression in liver cancer stem cells. World J Gastroenterol 2014; 20:6974-6980. [PMID: 24944491 PMCID: PMC4051940 DOI: 10.3748/wjg.v20.i22.6974] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Revised: 04/28/2014] [Accepted: 05/19/2014] [Indexed: 02/07/2023] Open
Abstract
AIM: To determine the influence of Adriamycin (ADM) on the changes in Nanog, Oct4, Sox2, as well as, in ARID1 and Wnt5b expression in liver cancer stem cells.
METHODS: The MHCC97-L and HCCLM3 liver cancer cell lines were selected as the cell models in this study, and were routinely cultured. The 50% lethal dose (LD50) in the cell lines was detected by the MTT assay. Expression changes in liver cancer stem cell related genes (Nanog, Oct-4, Sox2, ARID1, and Wnt5b) were detected by western blot following treatment with ADM (LD50).
RESULTS: The LD50 of ADM in MHCC97-L cells was lower than that in HCCLM3 cells (0.4123 ± 0.0236 μmol/L vs 0.5259 ± 0.0125 μmol/L, P < 0.05). Wnt5b and Nanog were expressed in both MHCC97-L and HCCLM3 cells, while only Sox2 was expressed in HCCLM3 cells. However, neither ARID1A nor Oct4 was detected in these two cell lines. Genes, related to the stem cells, showed different expression in liver cancer cells with different metastatic potential following treatment with ADM (LD50). Wnt5b protein increased gradually within 4 h of ADM (LD50) treatment, while Nanog decreased (P < 0.05). After 12 h, Wnt5b decreased gradually, while Nanog increased steadily (P < 0.05). In addition, only Sox2 was expressed in HCCLM3 cells with high metastatic potential following ADM (LD50) treatment. The expression of Sox2 increased gradually with ADM (LD50) in HCCLM3 cells (P < 0.05).
CONCLUSION: ADM increased the death rate of MHCC97-L and HCCLM3 cells, while the growth suppressive effect of ADM was higher in MHCC97-L cells than in HCCLM3 cells.
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Abstract
BACKGROUND Metastasis-associated in colon cancer-1 (MACC1), a newly identified regulator of HGF-MET signaling, may participate into the key steps of sporadic colorectal adenocarcinoma development. Given there are many pathogenetic distinctions between colitis-associated colorectal cancer (CAC) and sporadic colorectal adenocarcinomas, the potential roles of MACC1 in CAC carcinogenesis remain unknown. For the first time, we evaluated the expressions of MACC1 and MET in IBD-associated colitis, dysplasia, and adenocarcinoma. METHODS Expression was investigated by immunohistochemistry in tissue microarrays consisting of 13 normal colon, 11 active colitis, 9 dysplasia, 51 conventional CAC, 5 mucinous adenocarcinoma, and 1 signet ring cell adenocarcinoma specimens. The expression level of MACC1 or MET was evaluated with H-score system. RESULTS MACC1 expression was significantly higher in IBD-associated dysplasia than that in corresponding inflammatory or normal colonic tissue, and its level was further elevated from dysplasia to conventional CAC. Higher MACC1 expression was seen in a patient with CAC who had multifocal dysplasia or synchronous carcinoma. MACC1 overexpression (H-score >100) was seen in 67% of conventional CAC but in 0% of dysplasia and 0% of inflammation or normal colon. There was no difference of MACC1 expression found among well, moderately and poorly differentiated CAC. MET expressions in inflammation, dysplasia, and conventional CAC were statistically similar. No parallel expression of MACC1 and MET was detected in this study. MACC1 and MET expression was not increased in mucinous or signet ring cell carcinoma, 2 distinct variants of CAC. CONCLUSIONS Stepwise increase of MACC1 expression from IBD-associated colitis to dysplasia to adenocarcinoma suggests that MACC1 is strongly associated with conventional CAC tumorigenesis in a manner independent of MET. MACC1 may serve as a potential marker for early diagnosis of conventional CAC.
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Ye X, Wu F, Wu C, Wang P, Jung K, Gopal K, Ma Y, Li L, Lai R. β-Catenin, a Sox2 binding partner, regulates the DNA binding and transcriptional activity of Sox2 in breast cancer cells. Cell Signal 2013; 26:492-501. [PMID: 24291232 DOI: 10.1016/j.cellsig.2013.11.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 10/21/2013] [Accepted: 11/23/2013] [Indexed: 01/19/2023]
Abstract
Sox2, an embryonic stem cell marker, has been recently implicated in the pathogenesis of breast cancer (BC). Using liquid chromatography-mass spectrometry and co-immunoprecipitation, we identified β-catenin as a Sox2 binding partner in MCF7 cells. The interaction between Sox2 and β-catenin was substantially different between the two cell subsets separated based on their differential responsiveness to a Sox2 reporter. Specifically, while β-catenin binds to Sox2 in the nuclear fraction of cells showing reporter-responsiveness (i.e. RR cells), this interaction was not detectable in those that were reporter-unresponsive (i.e. RU cells). In RR but not in RU cells, siRNA knockdown of β-catenin significantly upregulated the Sox2 transcriptional activity, enhanced its DNA binding and increased the expression of its target genes. Correlating with these findings, while inhibition of β-catenin significantly downregulated the mammosphere formation efficiency in RU cells, this treatment paradoxically increased that of RR cells. To conclude, we identified that β-catenin is an important binding partner of Sox2 and a regulator of its transcriptional activity in a small subset of BC cells. The interaction between Sox2 and β-catenin provides a novel mechanism underlying the functional dichotomy of BC cells, which carries potential therapeutic implications.
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Affiliation(s)
- Xiaoxia Ye
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Fang Wu
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Chengsheng Wu
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Peng Wang
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Karen Jung
- Department of Oncology, University of Alberta, Edmonton, AB, Canada
| | - Keshav Gopal
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - Yupo Ma
- Department of Pathology, Stony Brook University, Stony Brook, NY, USA
| | - Liang Li
- Department of Chemistry, University of Alberta, Edmonton, AB, Canada
| | - Raymond Lai
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada; Department of Oncology, University of Alberta, Edmonton, AB, Canada; DynaLIFE(DX) Medical Laboratories, Edmonton, AB, Canada.
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Sentani K, Sakamoto N, Shimamoto F, Anami K, Oue N, Yasui W. Expression of olfactomedin 4 and claudin-18 in serrated neoplasia of the colorectum: a characteristic pattern is associated with sessile serrated lesion. Histopathology 2013; 62:1018-27. [PMID: 23570326 DOI: 10.1111/his.12099] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2012] [Accepted: 01/13/2013] [Indexed: 01/14/2023]
Abstract
AIMS Olfactomedin 4 is a useful marker for stem cells in the intestine and is an independent prognostic molecule for survival in patients with colorectal cancer (CRC). Claudin-18, a component of tight junctions, correlates with poor survival in patients with CRC and is associated with the gastric phenotype. We investigated the possible usefulness of these molecules in serrated neoplasia of the colorectum. METHODS AND RESULTS We performed immunohistochemical analysis of colorectal polyps, including hyperplastic polyps (HP), sessile serrated lesions (SSL), traditional serrated adenomas (TSA) and conventional adenomas (CA). We also investigated the association between expression of these molecules and clinicopathological parameters in serrated adenocarcinoma (SAC) and non-SAC of the colorectum. Olfactomedin 4 expression was not detected or was decreased in SSL compared with the other polyp types. Claudin-18 expression was higher in SSL than in the other types. Similarly, positivity for olfactomedin 4 in SAC was significantly lower than that in non-SAC, and positivity for claudin-18 in SAC was significantly higher than that in non-SAC. Furthermore, claudin-18-positive SAC showed more advanced N grade and stage than claudin-18-negative SAC. CONCLUSIONS Reduced expression of olfactomedin 4 and ectopic expression of claudin-18 might be useful markers in the differential diagnosis of serrated polyps.
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Affiliation(s)
- Kazuhiro Sentani
- Department of Molecular Pathology, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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Gopinath S, Malla R, Alapati K, Gorantla B, Gujrati M, Dinh DH, Rao JS. Cathepsin B and uPAR regulate self-renewal of glioma-initiating cells through GLI-regulated Sox2 and Bmi1 expression. Carcinogenesis 2012; 34:550-9. [PMID: 23222817 DOI: 10.1093/carcin/bgs375] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Cancer-initiating cells comprise a heterogeneous population of undifferentiated cells with the capacity for self-renewal and high proliferative potential. We investigated the role of uPAR and cathepsin B in the maintenance of stem cell nature in glioma-initiating cells (GICs). Simultaneous knockdown of uPAR and cathepsin B significantly reduced the expression of CD133, Nestin, Sox2 and Bmi1 at the protein level and GLI1 and GLI2 at the messenger RNA level. Also, knockdown of uPAR and cathepsin B resulted in a reduction in the number of GICs as well as sphere size. These changes are mediated by Sox2 and Bmi1, downstream of hedgehog signaling. Addition of cyclopamine reduced the expression of Sox2 and Bmi1 along with GLI1 and GLI2 expression, induced differentiation and reduced subsphere formation of GICs thereby indicating that hedgehog signaling acts upstream of Sox2 and Bmi1. Further confirmation was obtained from increased luciferase expression under the control of a GLI-bound Sox2 and Bmi1 luciferase promoter. Simultaneous knockdown of uPAR and cathepsin B also reduced the expression of Nestin Sox2 and Bmi1 in vivo. Thus, our study highlights the importance of uPAR and cathepsin B in the regulation of malignant stem cell self-renewal through hedgehog components, Bmi1 and Sox2.
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Affiliation(s)
- Sreelatha Gopinath
- Department of Cancer Biology & Pharmacology, University of Illinois College of Medicine at Peoria, One Illini Drive, Peoria, IL 61656, USA
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Aberrant expression and biological significance of Sox2, an embryonic stem cell transcriptional factor, in ALK-positive anaplastic large cell lymphoma. Blood Cancer J 2012; 2:e82. [PMID: 22885405 PMCID: PMC3432482 DOI: 10.1038/bcj.2012.27] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Sox2 (sex-determining region Y-Box) is one of the master transcriptional factors that are important in maintaining the pluripotency of embryonic stem cells (ESCs). In line with this function, Sox2 expression is largely restricted to ESCs and somatic stem cells. We report that Sox2 is expressed in cell lines and tumor samples derived from ALK-positive anaplastic large cell lymphoma (ALK+ALCL), for which the normal cellular counterpart is believed to be mature T-cells. The expression of Sox2 in ALK+ALCL can be attributed to nucleophosmin-anaplastic lymphoma kinase (NPM-ALK), the oncogenic fusion protein carrying a central pathogenetic role in these tumors. By confocal microscopy, Sox2 protein was detectable in virtually all cells in ALK+ALCL cell lines. However, the transcriptional activity of Sox2, as assessed using a Sox2-responsive reporter construct, was detectable only in a small proportion of cells. Importantly, downregulation of Sox2 using short interfering RNA in isolated Sox2active cells, but not Sox2inactive cells, resulted in a significant decrease in cell growth, invasiveness and tumorigenicity. To conclude, ALK+ALCL represents the first example of a hematologic malignancy that aberrantly expresses Sox2, which represents a novel mechanism by which NPM-ALK mediates tumorigenesis. We also found that the transcriptional activity and oncogenic effects of Sox2 can be heterogeneous in cancer cells.
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Camilo V, Barros R, Sousa S, Magalhães AM, Lopes T, Mário Santos A, Pereira T, Figueiredo C, David L, Almeida R. Helicobacter pylori and the BMP pathway regulate CDX2 and SOX2 expression in gastric cells. Carcinogenesis 2012; 33:1985-92. [PMID: 22791809 DOI: 10.1093/carcin/bgs233] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Helicobacter pylori infection is the main risk factor for intestinal metaplasia (IM) and gastric cancer development. IM is a pre-neoplastic lesion, induced by the transcription factor CDX2, where the gastric mucosa is converted to an intestinal phenotype. We previously demonstrated that key elements of the bone morphogenetic protein (BMP) pathway co-localize with CDX2 in IM and upregulate CDX2 expression in gastric cell lines. These observations, together with the hypothesis that CDX2 could be repressed by SOX2, led us to test whether H. pylori, through BMPs, SOX2 and CDX2 could participate in a molecular network critical for the development of IM. AGS cells with and without SMAD4 knock-down were co-cultured with H. pylori or BMP2 to assess the expression of BMP pathway members as well as CDX2 and SOX2 by qPCR and western blot. Proximity ligation assay (PLA) was also performed to evaluate SMAD proteins interaction. Immunohistochemistry and western blot were performed in gastric samples from mice infected with Helicobacter spp. to measure Smad4, pSmad1/5/8, Cdx2 and Sox2 expression in vivo. Increased expression and activity of the BMP pathway accompanied by CDX2 upregulation and SOX2 downregulation were observed in AGS cells co-cultured with H. pylori or BMP2. These effects were impaired by downregulation of the BMP pathway. Finally, infected mice present BMP pathway upregulation, focal Cdx2 expression and decreased Sox2. These results provide a novel link between H. pylori infection and the BMP pathway in the regulation of intestinal and gastric-specific genes that might be relevant for gastric IM.
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Affiliation(s)
- Vânia Camilo
- Institute of Molecular Pathology and Immunology, University of Porto, Porto, Portugal
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Velpula KK, Dasari VR, Tsung AJ, Dinh DH, Rao JS. Cord blood stem cells revert glioma stem cell EMT by down regulating transcriptional activation of Sox2 and Twist1. Oncotarget 2012; 2:1028-42. [PMID: 22184289 PMCID: PMC3282065 DOI: 10.18632/oncotarget.367] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The dynamic nature of cancer stem cells that underlie metastasis or their ability to switch between different cellular identities, as in EMT and MET, has profound implications for cancer therapy. The functional relationship between molecules involved in cancer cell stemness and metastasis is not clear. In this regard, our studies on hGBM tissue grade IV specimens showed significant expression of Twist1 and Sox2, known mesenchymal and stemness related markers, respectively, indicating their association with glial tumor genesis and metastasis. The glioma stem cells obtained from CD133+ cells demonstrated increased expression of Twist1 and Sox2 accompanied by significant increase in the mesenchymal markers such as N-cadherin, vimentin and β-catenin. Our studies on glioma stem cells treatment with human umbilical cord blood derived- mesenchymal stem cells, showed down regulation of Twist1 and Sox2 proteins, apart from other mesenchymal stem cell markers. Based on the in vitro experiments and in vivo intracranial xenograft mouse model studies, we elucidated the potential therapeutic role of hUCBSC in suppressing glioma cancer stemness by the induction of MET.
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Affiliation(s)
- Kiran Kumar Velpula
- Department of Cancer Biology and Pharmacology, University of Illinois College of Medicine at Peoria, Peoria, Illinois, USA
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45
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Xue Z, Yan H, Li J, Liang S, Cai X, Chen X, Wu Q, Gao L, Wu K, Nie Y, Fan D. Identification of cancer stem cells in vincristine preconditioned SGC7901 gastric cancer cell line. J Cell Biochem 2012; 113:302-12. [PMID: 21913215 DOI: 10.1002/jcb.23356] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Cancer stem cells (CSCs), or tumor initiating cells, are a subpopulation of cancer cells with self-renewal and differentiation properties. However, there has been no direct observation of the properties of gastric CSCs in vitro. Here we describe a vincristine (VCR)-preconditioning approach to obtain cancer stem-like cells (CSLCs) from the gastric cancer cell line SGC7901. The CSLCs displayed mesenchymal characteristics, including the up-regulated mesenchymal markers Snail, Twist, and vimentin, and the down-regulated epithelial marker E-cadherin. Using a Matrigel-based differentiation assay, CSLCs formed 2D tube-like and 3D complex lumen-like structures, which resembled differentiated gastric crypts. The characteristic of cellular differentiation was also found by transmission electron microscopy and up-regulation of gastrointestinal genes CDX2 and SOX2. We further showed that CSLCs could self-renew through significant asymmetric division compared with parent cells by tracing PKH-26, BrdU, and EDU label-retaining cells. In addition, these CSLCs also increased expression of CD44, CD90, and CXCR4 at the mRNA level, which was identified as novel targets. Furthermore, drug sensitivity assays and xenograft experiments demonstrated that the cells developed multi-drug resistance (MDR) and significant tumorigenicity in vivo. In summary, gastric CSCs were identified from VCR-preconditioned SGC7901 cell line, characterized by high tumorigenicity and the capacity for self-renewal and differentiation.
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Affiliation(s)
- Zengfu Xue
- State Key Laboratory of Cancer Biology & Institute of Digestive Diseases, Xijing Hospital of Digestive Diseases, Xi'an 710032, China
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Raghoebir L, Bakker ERM, Mills JC, Swagemakers S, Kempen MBV, Munck ABD, Driegen S, Meijer D, Grosveld F, Tibboel D, Smits R, Rottier RJ. SOX2 redirects the developmental fate of the intestinal epithelium toward a premature gastric phenotype. J Mol Cell Biol 2012; 4:377-85. [PMID: 22679103 DOI: 10.1093/jmcb/mjs030] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Various factors play an essential role in patterning the digestive tract. During development, Sox2 and Cdx2 are exclusively expressed in the anterior and the posterior parts of the primitive gut, respectively. However, it is unclear whether these transcription factors influence each other in determining specification of the naïve gut endoderm. We therefore investigated whether Sox2 redirects the fate of the prospective intestinal part of the primitive gut. Ectopic expression of Sox2 in the posterior region of the primitive gut caused anteriorization of the gut toward a gastric-like phenotype. Sox2 activated the foregut transcriptional program, in spite of sustained co-expression of endogenous Cdx2. However, binding of Cdx2 to its genomic targets and thus its transcriptional activity was strongly reduced. Recent findings indicate that endodermal Cdx2 is required to initiate the intestinal program and to suppress anterior cell fate. Our findings suggest that reduced Cdx2 expression by itself is not sufficient to cause anteriorization, but that Sox2 expression is also required. Moreover, it indicates that the balance between Sox2 and Cdx2 function is essential for proper specification of the primitive gut and that Sox2 may overrule the initial patterning of the primitive gut, emphasizing the plasticity of the primitive gut.
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Affiliation(s)
- Lalini Raghoebir
- Department of Pediatric Surgery, Erasmus Medical Center, Dr Molewaterplein 50, 3015GE Rotterdam, The Netherlands
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Pestereva E, Kanakasabai S, Bright JJ. PPARγ agonists regulate the expression of stemness and differentiation genes in brain tumour stem cells. Br J Cancer 2012; 106:1702-12. [PMID: 22531638 PMCID: PMC3349185 DOI: 10.1038/bjc.2012.161] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Background: Brain tumour stem cells (BTSCs) are a small population of cancer cells that exhibit self-renewal, multi-drug resistance, and recurrence properties. We have shown earlier that peroxisome proliferator-activated receptor gamma (PPARγ) agonists inhibit the expansion of BTSCs in T98G and U87MG glioma. In this study, we analysed the influence of PPARγ agonists on the expression of stemness and differentiation genes in BTSCs. Methods: The BTSCs were isolated from T98G and DB29 glioma cells, and cultured in neurobasal medium with epidermal growth factor+basic fibroblast growth factor. Proliferation was measured by WST-1 (4-[3-(4-iodophenyl)-2-(4-nitrophenyl)-2 H-5-tetrazolio]-1,3-benzene disulphonate) and 3H thymidine uptake assays, and gene expression was analysed by quantitative reverse--transcription PCR and Taqman array. The expression of CD133, SRY box 2, and nanog homeobox (Nanog) was also evaluated by western blotting, immunostaining, and flow cytometry. Results: We found that PPARγ agonists, ciglitazone and 15-deoxy-Δ12,14-ProstaglandinJ2, inhibited cell viability and proliferation of T98G- and DB29-BTSCs. The PPARγ agonists reduced the expansion of CD133+ BTSCs and altered the expression of stemness and differentiation genes. They also inhibited Sox2 while enhancing Nanog expression in BTSCs. Conclusion: These findings highlight that PPARγ agonists inhibit BTSC proliferation in association with altered expression of Sox2, Nanog, and other stemness genes. Therefore, targeting stemness genes in BTSCs could be a novel strategy in the treatment of glioblastoma.
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Affiliation(s)
- E Pestereva
- Neuroscience Research Laboratory, Methodist Research Institute, Indiana University Health, 1800 North Capitol Avenue, Noyes Building E504C, Indianapolis, IN 46202, USA
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Neumann J, Bahr F, Horst D, Kriegl L, Engel J, Luque RM, Gerhard M, Kirchner T, Jung A. SOX2 expression correlates with lymph-node metastases and distant spread in right-sided colon cancer. BMC Cancer 2011; 11:518. [PMID: 22168803 PMCID: PMC3267776 DOI: 10.1186/1471-2407-11-518] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Accepted: 12/14/2011] [Indexed: 02/07/2023] Open
Abstract
Background The transcription factor SOX2, which is involved in the induction of pluripotent stem cells and contributes to colorectal carcinogenesis, is associated with a poor prognosis in colon cancer (CC). Furthermore, SOX2 is a repressor of the transcriptional activity of β-catenin in vitro. Since the majority of CC develop via an activation of the Wnt/β-catenin signalling pathway, indicated by nuclear expression of β-catenin, we wanted to investigate the expression patterns of SOX2 and β-catenin and correlate them with the occurrence of lymph node and distant metastases as indicators of malignant progression. Methods The expression of SOX2 and β-catenin was investigated in a case control study utilizing a matched pair collection (N = 114) of right-sided CCs with either corresponding distant metastases (N = 57) or without distant spread (N = 57) by applying immunohistochemistry. Results Elevated protein expression of SOX2 significantly correlated with the presence of lymph node- (p = 0.006) and distant metastases (p = 0.022). Nuclear β-catenin expression correlated significantly only with distant metastases (p = 0.001). Less than 10% of cases showed a coexpression of high levels of β-catenin and SOX2. The positivity for both markers was also associated with a very high risk for lymph-node metastases (p = 0.007) and distant spread (p = 0.028). Conclusion We demonstrated that increased expression of either SOX2 or nuclear β-catenin are associated with distant metastases in right-sided CC. Additionally, SOX2 is also associated with lymph-node metastases. These data underline the importance of stemness-associated markers for the identification of CC with high risk for distant spread.
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Affiliation(s)
- Jens Neumann
- Pathologisches Institut, Ludwig-Maximilians-Universität München, Munich, Germany.
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Zhu R, Iacovino M, Mahen E, Kyba M, Matin A. Transcripts that associate with the RNA binding protein, DEAD-END (DND1), in embryonic stem (ES) cells. BMC Mol Biol 2011; 12:37. [PMID: 21851623 PMCID: PMC3167746 DOI: 10.1186/1471-2199-12-37] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Accepted: 08/18/2011] [Indexed: 12/11/2022] Open
Abstract
Background The RNA binding protein, DEAD END (DND1), is essential for maintaining viable germ cells in vertebrates. It is also a testicular germ cell tumor susceptibility factor in mice. DND1 has been shown to interact with the 3'-untranslated region (3'-UTR) of mRNAs such as P27 and LATS2. Binding of DND1 to the 3'-UTRs of these transcripts blocks the inhibitory function of microRNAs (miRNA) from these transcripts and in this way DND1 helps maintain P27 and LATS2 protein expression. We found that DND1 is also expressed in embryonic stem (ES) cells. Because ES cells share similar gene expression patterns as germ cells, we utilized ES cells to identify additional candidate mRNAs that associate with DND1. Results ES cells are readily amenable to genetic modification and easier to culture in vitro compared to germ cells. Therefore, for the purpose of our study, we made a genetically modified, stable, human embryonic stem (hES) cell line that expresses hemagluttinin (HA)-tagged DND1 in a doxycycline (dox) regulatable manner. This line expresses modest levels of HA-DND1 and serves as a good system to study DND1 function in vitro. We used this stable cell line to identify the transcripts that physically interact with DND1. By performing ribonucleoprotein immunoprecipitation (RIP) followed by RT-PCR, we identified that transcripts encoding pluripotency factors (OCT4, SOX2, NANOG, LIN28), cell cycle regulators (TP53, LATS2) and apoptotic factors (BCLX, BAX) are specifically associated with the HA-DND1 ribonucleoprotein complex. Surprisingly, in many cases, bioinformatics analysis of the pulled-down transcripts did not reveal the presence of known DND1 interacting motifs. Conclusions Our results indicate that the inducible ES cell line system serves as a suitable in vitro system to identify the mRNA targets of DND1. The RIP-RT results hint at the broad spectrum of mRNA targets that interact with DND1 in ES cells. Based on what is known about DND1 function, our results suggest that DND1 may impose another level of translational regulation to modulate expression of critical factors in ES cells.
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Affiliation(s)
- Rui Zhu
- Department of Genetics, University of Texas, MD Anderson Cancer Center, Houston, TX 77030, USA
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Gopalan V, Smith RA, Ho YH, Lam AKY. Signet-ring cell carcinoma of colorectum--current perspectives and molecular biology. Int J Colorectal Dis 2011; 26:127-33. [PMID: 20686774 DOI: 10.1007/s00384-010-1037-z] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/26/2010] [Indexed: 02/08/2023]
Abstract
PURPOSE Colorectal signet-ring cell carcinoma (SRCC) is rare, and very little detailed information on the molecular biology of the disease is available. METHODS The literature on the clinical, pathological and, in particular, the molecular biology of this rare entity was critically reviewed. The reviewed articles take into account a total of 1,817 cases of SRCC, but only 143 cases have molecular data available. The characteristics of two patients with colorectal SRCC were also discussed. RESULTS Colorectal SRCC mostly occurs in younger patients, is larger and has different site predilection compared with conventional colorectal adenocarcinoma. It can occur as one of the synchronous cancers in the colorectum. The cancer is usually diagnosed at advanced stages because of the late manifestation of symptoms, and aggressive treatment strategy is required. Limited reports in the literature have shown that the variant of colorectal cancer demonstrated a different pattern of genetic alterations of common growth kinase-related oncogenes (K-ras, BRAF), tumour suppressor genes (p53, p16), gene methylation and cell adhesion-related genes related to the Wingless signalling pathway (E-cadherin and beta-catenin) from conventional colorectal adenocarcinoma. Colorectal SRCC also showed high expression of mucin-related genes and genes related to the gastrointestinal system. There was also a higher prevalence of microsatellite instability-high tumours and low Cox-2 expression in colorectal SRCC as opposed to conventional adenocarcinoma. CONCLUSIONS Colorectal SRCC has unique molecular pathological features. The unique molecular profiles in SRCC may provide molecular-based improvements to patient management in colorectal SRCC.
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Affiliation(s)
- Vinod Gopalan
- School of Medicine, Griffith Health Institute, Gold Coast, QLD, Australia
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