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Basu M, Chatterjee A, Chakraborty B, Chatterjee E, Ghosh S, Samadder S, Pal DK, Roy A, Chakrabarti J, Ghosh A, Panda CK. High nuclear expression of HIF1α, synergizing with inactivation of LIMD1 and VHL, portray worst prognosis among the bladder cancer patients: association with arsenic prevalence. J Cancer Res Clin Oncol 2021; 147:2309-2322. [PMID: 34080067 DOI: 10.1007/s00432-021-03661-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 05/05/2021] [Indexed: 11/25/2022]
Abstract
PURPOSE Our study was aimed to understand the importance of LIMD1-VHL-HIF1α pathway in development of bladder carcinoma (BlCa) in association with arsenic prevalence. METHODS At first, the mRNA expression pattern of the genes of this pathway (LIMD1, VHL and HIF1α) was checked in GEO datasets and in our samples. Next, genetic and epigenetic profiling of LIMD1 and VHL was done in our sample pool, validated in T24 BlCa cell line. The results were next correlated with various clinico-pathological parameters. RESULTS Differential under-expression of LIMD1 and VHL genes was found in muscle-invasive BlCa (MIBC) in comparison to non-muscle-invasive BlCa (NMIBC). However, HIF1α protein, but mRNA, was found to be overexpressed among the MIBC samples; depicting the probability of HIF1α protein stabilization. Analysis of genetic and epigenetic profiles of LIMD1 and VHL exposed a frequent promoter methylation of LIMD1 gene in MIBC samples. Further, in-depth look into the results unveiled that the high nuclear expression of HIF1α was significantly correlated with genetic alterations of LIMD1, alone or in combination with VHL. Moreover, treating the T24 cells with a de-methylating agent (5-aza-2'-deoxycytidine) re-expressed the methylated LIMD1 and VHL genes, which in turn, reduced the HIF1α protein level significantly. Additionally, patients with high arsenic content (> 112 ng/g, AsH) seemed to have recurrent promoter methylation in LIMD1, as well as co-methylation/alteration of LIMD1 and VHL gene. Lastly, high nuclear expression of HIF1α in association with co-alteration of VHL and LIMD1 showed the worst overall survival (OS) among the patients. CONCLUSION To conclude, MIBC samples portrayed higher alterations in VHL and LIMD1, thereby, stabilizing HIF1α protein and lowering the OS of patients.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Arsenic Poisoning/diagnosis
- Arsenic Poisoning/epidemiology
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Carcinoma, Transitional Cell/diagnosis
- Carcinoma, Transitional Cell/epidemiology
- Carcinoma, Transitional Cell/genetics
- Carcinoma, Transitional Cell/pathology
- Cell Line, Tumor
- Cell Nucleus/genetics
- Cell Nucleus/metabolism
- Cell Nucleus/pathology
- Comorbidity
- DNA Methylation
- Datasets as Topic
- Female
- Gene Expression Regulation, Neoplastic
- Gene Silencing
- Humans
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/metabolism
- Intracellular Signaling Peptides and Proteins/genetics
- Intracellular Signaling Peptides and Proteins/metabolism
- LIM Domain Proteins/genetics
- LIM Domain Proteins/metabolism
- Male
- Middle Aged
- Neoplasm Invasiveness
- Prevalence
- Prognosis
- Survival Analysis
- Urinary Bladder Neoplasms/diagnosis
- Urinary Bladder Neoplasms/epidemiology
- Urinary Bladder Neoplasms/genetics
- Urinary Bladder Neoplasms/pathology
- Von Hippel-Lindau Tumor Suppressor Protein/genetics
- Von Hippel-Lindau Tumor Suppressor Protein/metabolism
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Affiliation(s)
- Mukta Basu
- Department of Oncogene Regulation, Chittaranjan National Cancer Institute, 37 S. P. Mukherjee Road, Kolkata, West Bengal, 700026, India
| | - Amvrin Chatterjee
- Department of Urology, IPGMER, SSKM, 244 A.J.C. Bose Road, Kolkata, 700020, India
| | - Balarko Chakraborty
- Department of Oncogene Regulation, Chittaranjan National Cancer Institute, 37 S. P. Mukherjee Road, Kolkata, West Bengal, 700026, India
| | - Essha Chatterjee
- National Institute of Pharmaceutical Education and Research, Kukatpally Industrial Estate, Balanagar, Hyderabad, Telangana, 500037, India
| | - Sabnam Ghosh
- Department of Life Science, Presidency University, 86/1, College Street, Kolkata, 700073, India
| | - Sudip Samadder
- Department of Oncogene Regulation, Chittaranjan National Cancer Institute, 37 S. P. Mukherjee Road, Kolkata, West Bengal, 700026, India
| | - Dilip Kumar Pal
- Department of Urology, IPGMER, SSKM, 244 A.J.C. Bose Road, Kolkata, 700020, India
| | - Anup Roy
- Nil Ratan Sarkar Medical College and Hospital, Kolkata, West Bengal, India
| | - Jayanta Chakrabarti
- Department of Oncogene Regulation, Chittaranjan National Cancer Institute, 37 S. P. Mukherjee Road, Kolkata, West Bengal, 700026, India
| | - Amlan Ghosh
- Department of Life Science, Presidency University, 86/1, College Street, Kolkata, 700073, India
| | - Chinmay Kumar Panda
- Department of Oncogene Regulation, Chittaranjan National Cancer Institute, 37 S. P. Mukherjee Road, Kolkata, West Bengal, 700026, India.
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Chakraborty C, Mitra S, Roychowdhury A, Samadder S, Dutta S, Roy A, Das P, Mandal RK, Sharp TV, Roychoudhury S, Panda CK. Deregulation of LIMD1-VHL-HIF-1α-VEGF pathway is associated with different stages of cervical cancer. Biochem J 2018; 475:1793-1806. [PMID: 29654110 DOI: 10.1042/bcj20170649] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 04/05/2018] [Accepted: 04/12/2018] [Indexed: 03/25/2024]
Abstract
To understand the mechanism of cellular stress in basal-parabasal layers of normal cervical epithelium and during different stages of cervical carcinoma, we analyzed the alterations (expression/methylation/copy number variation/mutation) of HIF-1α and its associated genes LIMD1, VHL and VEGF in disease-free normal cervix (n = 9), adjacent normal cervix of tumors (n = 70), cervical intraepithelial neoplasia (CIN; n = 32), cancer of uterine cervix (CACX; n = 174) samples and two CACX cell lines. In basal-parabasal layers of normal cervical epithelium, LIMD1 showed high protein expression, while low protein expression of VHL was concordant with high expression of HIF-1α and VEGF irrespective of HPV-16 (human papillomavirus 16) infection. This was in concordance with the low promoter methylation of LIMD1 and high in VHL in the basal-parabasal layers of normal cervix. LIMD1 expression was significantly reduced while VHL expression was unchanged during different stages of cervical carcinoma. This was in concordance with their frequent methylation during different stages of this tumor. In different stages of cervical carcinoma, the expression pattern of HIF-1α and VEGF was high as seen in basal-parabasal layers and inversely correlated with the expression of LIMD1 and VHL. This was validated by demethylation experiments using 5-aza-2'-deoxycytidine in CACX cell lines. Additional deletion of LIMD1 and VHL in CIN/CACX provided an additional growth advantage during cervical carcinogenesis through reduced expression of genes and associated with poor prognosis of patients. Our data showed that overexpression of HIF-1α and its target gene VEGF in the basal-parabasal layers of normal cervix was due to frequent inactivation of VHL by its promoter methylation. This profile was maintained during different stages of cervical carcinoma with additional methylation/deletion of VHL and LIMD1.
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Affiliation(s)
| | - Sraboni Mitra
- Department of Systems Biology, MD Anderson Cancer Center, Houston, TX, U.S.A
| | - Anirban Roychowdhury
- Department of Oncogene Regulation, Chittaranjan National Cancer Institute, Kolkata, India
| | - Sudip Samadder
- Department of Oncogene Regulation, Chittaranjan National Cancer Institute, Kolkata, India
| | - Sankhadeep Dutta
- Infections and Cancer Biology Division, International Agency for Research on Cancer, Lyon, France
| | - Anup Roy
- Department of Pathology, Nil Ratan Sircar Medical College and Hospital, Kolkata, India
| | - Pradip Das
- Department of Gynaecologic Oncology, Chittaranjan National Cancer Institute, Kolkata, India
| | - Ranajit Kumar Mandal
- Department of Gynaecologic Oncology, Chittaranjan National Cancer Institute, Kolkata, India
| | - Tyson V Sharp
- Barts Cancer Institute, Queen Mary University of London, London, U.K
| | - Susanta Roychoudhury
- Saroj Gupta Cancer Centre and Research Institute, MG Road, Thakurpukur, Kolkata, India
| | - Chinmay Kumar Panda
- Department of Oncogene Regulation, Chittaranjan National Cancer Institute, Kolkata, India
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Sarkar S, Alam N, Mandal SS, Chatterjee K, Ghosh S, Roychoudhury S, Panda CK. Differential transmission of the molecular signature of RBSP3, LIMD1 and CDC25A in basal/ parabasal versus spinous of normal epithelium during head and neck tumorigenesis: A mechanistic study. PLoS One 2018; 13:e0195937. [PMID: 29672635 PMCID: PMC5909606 DOI: 10.1371/journal.pone.0195937] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 04/03/2018] [Indexed: 12/16/2022] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) is a global disease and mortality burden, necessitating the elucidation of its molecular progression for effective disease management. The study aims to understand the molecular profile of three candidate cell cycle regulatory genes, RBSP3, LIMD1 and CDC25A in the basal/ parabasal versus spinous layer of normal oral epithelium and during head and neck tumorigenesis. Immunohistochemical expression and promoter methylation was used to determine the molecular signature in normal oral epithelium. The mechanism of alteration transmission of this profile during tumorigenesis was then explored through additional deletion and mutation in HPV/ tobacco etiological groups, followed byclinico-pathological correlation. In basal/parabasal layer, the molecular signature of the genes was low protein expression/ high promoter methylation of RBSP3, high expression/ low methylation of LIMD1 and high expression of CDC25A. Dysplastic epithelium maintained the signature of RBSP3 through high methylation/ additional deletion with loss of the signatures of LIMD1 and CDC25A via deletion/ additional methylation. Similarly, maintenance and / or loss of signature in invasive tumors was by recurrent deletion/ methylation. Thus, differential patterns of alteration of the genes might be pre-requisite for the development of dysplastic and invasive lesions. Etiological factors played a key role in promoting genetic alterations and determining prognosis. Tobacco negative HNSCC patients had significantly lower alterations of LIMD1 and CDC25A, along with better survival among tobacco negative/ HPV positive patients. Our data suggests the necessity for perturbation of normal molecular profile of RBSP3, LIMD1 and CDC25A in conjunction with etiological factors for head and neck tumorigenesis, implying their diagnostic and prognostic significance.
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Affiliation(s)
- Shreya Sarkar
- Department of Oncogene Regulation, Chittaranjan National Cancer Institute, Kolkata, India
| | - Neyaz Alam
- Department of Surgical Oncology, Chittaranjan National Cancer Institute, Kolkata, India
| | - Syam Sundar Mandal
- Department of Epidemiology and Biostatistics, Chittaranjan National Cancer Institute, Kolkata, India
| | - Kabita Chatterjee
- Department of Oral and Maxillofacial Pathology, Buddha Institute of Dental Sciences and Hospital, Patna, India
| | - Supratim Ghosh
- Department of Oral and Maxillofacial Pathology, Burdwan Dental College and Hospital, Burdwan, India
| | - Susanta Roychoudhury
- Basic Research, Saroj Gupta Cancer Centre and Research Institute, Kolkata, India
| | - Chinmay Kumar Panda
- Department of Oncogene Regulation, Chittaranjan National Cancer Institute, Kolkata, India
- * E-mail:
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Over expression of HIF1α is associated with inactivation of both LimD1 and VHL in renal cell carcinoma: Clinical importance. Pathol Res Pract 2017; 213:1477-1481. [DOI: 10.1016/j.prp.2017.10.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 10/03/2017] [Accepted: 10/07/2017] [Indexed: 01/07/2023]
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Molecular progression of head and neck squamous cell carcinoma. THE NUCLEUS 2017. [DOI: 10.1007/s13237-017-0212-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Association of P16-RBSP3 inactivation with phosphorylated RB1 overexpression in basal-parabasal layers of normal cervix unchanged during CACX development. Biochem J 2016; 473:3221-36. [PMID: 27458253 DOI: 10.1042/bcj20160323] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Accepted: 07/25/2016] [Indexed: 12/21/2022]
Abstract
To understand the molecular mechanism of RB1 phosphorylation in basal-parabasal layers of normal cervix and during cervical cancer (CACX) development, we analyzed the alterations (expression/methylation/deletion/mutation) of RB1/phosphorylated RB1 (p-RB1) (ser807/811 and ser567) and two RB1 phosphorylation inhibitors, P16 and RBSP3, in disease-free normal cervical epithelium (n = 9), adjacent normal cervical epithelium of tumors (n = 70), cervical intraepithelial neoplasia (CIN; n = 28), CACX (n = 102) samples and two CACX cell lines. Immunohistochemical analysis revealed high/medium expression of RB1/p-RB1 (ser807/811 and ser567) and low expression of P16 and RBSP3 in proliferating basal-parabasal layers of majority of normal cervical epitheliums, irrespective of HPV16 infection. Interestingly, 35-52% samples showed high/medium expression of P16 in basal-parabasal layers of normal and had significant association with deleterious non-synonimous SNPs of P16. Methylation of P16 and RBSP3 in basal-parabasal layers of normal cervix (32 and 62%, respectively) showed concordance with their respective expressions in basal-parabasal layers. The methylation frequency of P16 and RBSP3 in basal-parabasal layers of normal did not change significantly in CIN and CACX. The deletion frequency of P16 and RB1 increased significantly with CACX progression. While, deletion of RBSP3 was high in CIN and comparable during CACX progression. P16 showed scattered and infrequent mutation in CACX. The alteration of P16 and RBSP3 was synergistic and showed association with overexpression of p-RB1 in tumors and associated with poor prognosis of patients. Thus, our data suggest that overexpression of p-RB1 in basal-parabasal layers of normal cervical epithelium was due to methylation/low functional-linked non-synonimous SNPs of P16 and RBSP3. This pattern was maintained during cervical carcinogenesis by additional deletion/mutation.
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Chen L, Liu W, Wang P, Xue Y, Su Q, Zeng C, Shang X. Endophilin-1 regulates blood-brain barrier permeability via EGFR-JNK signaling pathway. Brain Res 2015; 1606:44-53. [PMID: 25721793 DOI: 10.1016/j.brainres.2015.02.032] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 02/08/2015] [Accepted: 02/10/2015] [Indexed: 10/23/2022]
Abstract
Endophilin-1 (Endo1), a multifunctional protein, is essential for synaptic vesicle endocytosis. However, the role and mechanism of endophilin-1 in blood-brain barrier (BBB) function are still unclear. This study was performed to determine whether endophilin-1 regulated BBB permeability via the EGFR-JNK signaling pathway. In the present study, we found that endophilin-1 over-expression in human cerebral microvascular endothelial cell (hCMEC/D3) increased BBB permeability and meanwhile reduced the expression levels of epidermal growth factor receptor (EGFR), phosphorylated c-Jun N-terminal kinase (p-JNK). While endophilin-1 knockdown led to the contrary results. After JNK inhibitor SP600125 was administered to the endophilin-1 silenced hCMEC/D3 cells, the transendothelial electrical resistance (TEER) value was decreased and the permeability coefficient values to 4kDa and 40kDa FITC-dextran were increased. Results observed by Transmission electron microscopy (TEM) showed that tight junctions (TJs) were opened. Moreover, immunofluorescence and Western blot assays revealed the discontinuous distribution of TJ-associated proteins ZO-1, occludin on cell-cell boundaries and a significant decrease in protein expressing levels. Therefore, these results indicated that endophilin-1 positively regulated BBB permeability via the EGFR-JNK signaling pathway in hCMEC/D3 cells, which would provide an experimental basis for further research on endophilin-1 mediated the opening of BBB.
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Affiliation(s)
- Lin Chen
- Department of Neurology, First Affiliated Hospital, China Medical University, Shenyang 110001, People׳s Republic of China; Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang 110001, People׳s Republic of China; Institute of Pathology and Pathophysiology, China Medical University, Shenyang 110001, People׳s Republic of China; Department of Neurology, Hainan Provincial Nongken General Hospital, Haikou 570311, People׳s Republic of China
| | - Wenjing Liu
- Department of Neurology, First Affiliated Hospital, China Medical University, Shenyang 110001, People׳s Republic of China; Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang 110001, People׳s Republic of China; Institute of Pathology and Pathophysiology, China Medical University, Shenyang 110001, People׳s Republic of China
| | - Ping Wang
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang 110001, People׳s Republic of China; Institute of Pathology and Pathophysiology, China Medical University, Shenyang 110001, People׳s Republic of China
| | - Yixue Xue
- Department of Neurobiology, College of Basic Medicine, China Medical University, Shenyang 110001, People׳s Republic of China; Institute of Pathology and Pathophysiology, China Medical University, Shenyang 110001, People׳s Republic of China
| | - Qingjie Su
- Department of Neurology, Hainan Provincial Nongken General Hospital, Haikou 570311, People׳s Republic of China
| | - Chaosheng Zeng
- Department of Neurology, Hainan Provincial Nongken General Hospital, Haikou 570311, People׳s Republic of China
| | - Xiuli Shang
- Department of Neurology, First Affiliated Hospital, China Medical University, Shenyang 110001, People׳s Republic of China.
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Liu W, Wang P, Shang C, Chen L, Cai H, Ma J, Yao Y, Shang X, Xue Y. Endophilin-1 regulates blood–brain barrier permeability by controlling ZO-1 and occludin expression via the EGFR–ERK1/2 pathway. Brain Res 2014; 1573:17-26. [DOI: 10.1016/j.brainres.2014.05.022] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 05/07/2014] [Accepted: 05/13/2014] [Indexed: 01/07/2023]
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Lee CH, Wong TS, Chan JYW, Lu SC, Lin P, Cheng AJ, Chen YJ, Chang JSM, Hsiao SH, Leu YW, Li CI, Hsiao JR, Chang JY. Epigenetic regulation of the X-linked tumour suppressors BEX1 and LDOC1 in oral squamous cell carcinoma. J Pathol 2013; 230:298-309. [PMID: 23362108 DOI: 10.1002/path.4173] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Revised: 01/07/2013] [Accepted: 01/24/2013] [Indexed: 12/31/2022]
Abstract
The strong associations between oral squamous cell carcinoma (OSCC) and dietary habits such as alcohol consumption (A), betel quid chewing (B) and cigarette smoking (C) and its predominance in men have been well documented; however, systemic analysis of OSCC is limited. Our study applied high-throughput screening methods to identify causative epigenetic targets in a cohort of men with ABC-associated OSCC. We identified BEX1 and LDOC1 as two epigenetically silenced X-linked tumour suppressors and demonstrated a functional link between the transcription of BEX1 and LDOC1 and promoter hypermethylation. Methylation of the BEX1 and LDOC1 promoters was associated significantly (p < 0.0001) with OSCC and were detected in 75% (42/56) and 89% (50/56) of the samples, respectively. We observed concordant increases in the methylation of both genes in 71% (40/56) of the tumours, and potent in vitro and in vivo growth inhibitory effects in OSCC cells ectopically expressing BEX1 and/or LDOC1. Restored expression of BEX1 and LDOC1 suppressed the nuclear factor-κB (NF-κB) signalling pathway, which is the most frequently hyperactivated signalling pathway in OSCC. This suppression might result from decreased p50 and p65 expression. These findings suggest that silencing of BEX1 and LDOC1 by promoter hypermethylation might represent a critical event in the molecular pathogenesis of OSCC and account for the oncogenic effects of ABC exposure and the male predominance of OSCC occurrence. Microarray data are available in the Gene Expression Omnibus (GEO; http://www.ncbi.nlm.nih.gov/geo/)
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Affiliation(s)
- Chia-Huei Lee
- National Institute of Cancer Research, National Health Research Institutes, Zhunan, Taiwan
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Sarkar S, Maiti GP, Jha J, Biswas J, Roy A, Roychoudhury S, Sharp T, Panda CK. Reduction of proliferation and induction of apoptosis are associated with shrinkage of head and neck squamous cell carcinoma due to neoadjuvant chemotherapy. Asian Pac J Cancer Prev 2013; 14:6419-25. [PMID: 24377544 DOI: 10.7314/apjcp.2013.14.11.6419] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2024] Open
Abstract
BACKGROUND Neoadjuvant chemotherapy (NACT) is a treatment modality whereby chemotherapy is used as the initial treatment of HNSCC in patients presenting with advanced cancer that cannot be treated by other means. It leads to shrinkage of tumours to an operable size without significant compromise to essential oro-facial organs of the patients. The molecular mechanisms behind shrinkage due to NACT is not well elucidated. MATERIALS AND METHODS Eleven pairs of primary HNSCCs and adjacent normal epithelium, before and after chemotherapy were screened for cell proliferation and apoptosis. This was followed by immunohistochemical analysis of some cell cycle (LIMD1, RBSP3, CDC25A, CCND1, cMYC, RB, pRB), DNA repair (MLH1, p53) and apoptosis (BAX, BCL2) associated proteins in the same set of samples. RESULTS Significant decrease in proliferation index and increase in apoptotic index was observed in post-therapy tumors compared to pre-therapy. Increase in the RB/ pRB ratio, along with higher expression of RBSP3 and LIMD1 and lower expression of cMYC were observed in post-therapy tumours, while CCND1 and CDC25A remained unchanged. While MLH1 remained unchanged, p53 showed higher expression in post-therapy tumors, indicating inhibition of cell proliferation and induction of apoptosis. Increase in the BAX/BCL2 ratio was observed in post-therapy tumours, indicating up-regulation of apoptosis in response to therapy. CONCLUSIONS Thus, modulation of the G1/S cell cycle regulatory proteins and apoptosis associated proteins might play an important role in tumour shrinkage due to NACT.
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Affiliation(s)
- Shreya Sarkar
- Department of Oncogene Regulation, Chittaranjan National Cancer Institute, Kolkata, India E-mail :
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