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Kizhakeyil A, Zaini NBM, Poh ZS, Wong BHS, Loh X, Ng AS, Low ZS, Prasannan P, Gong C, Tan MGK, Nagarajan C, Huang D, Lu PW, Lim JQ, Barrans S, Ong CK, Lim ST, Chng WJ, Follows G, Hodson DJ, Du MQ, Goh YT, Tan SH, Grigoropoulos NF, Verma NK. DDX3X loss is an adverse prognostic marker in diffuse large B-cell lymphoma and is associated with chemoresistance in aggressive non-Hodgkin lymphoma subtypes. Mol Cancer 2021; 20:134. [PMID: 34654425 PMCID: PMC8520256 DOI: 10.1186/s12943-021-01437-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 09/24/2021] [Indexed: 01/03/2023] Open
Affiliation(s)
- Atish Kizhakeyil
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, 11 Mandalay Road, Clinical Sciences Building, Singapore, 308232, Singapore
| | | | - Zhi Sheng Poh
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, 11 Mandalay Road, Clinical Sciences Building, Singapore, 308232, Singapore
| | - Brandon Han Siang Wong
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, 11 Mandalay Road, Clinical Sciences Building, Singapore, 308232, Singapore
| | - Xinpeng Loh
- School of Biological Sciences, Nanyang Technological University Singapore, 60 Nanyang Dr, Singapore, 637551, Singapore
| | - Aik Seng Ng
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, 11 Mandalay Road, Clinical Sciences Building, Singapore, 308232, Singapore
| | - Zun Siong Low
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, 11 Mandalay Road, Clinical Sciences Building, Singapore, 308232, Singapore
| | - Praseetha Prasannan
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, 11 Mandalay Road, Clinical Sciences Building, Singapore, 308232, Singapore
| | - Chun Gong
- Wellcome MRC Cambridge Stem Cell Institute, Cambridge, UK
| | - Michelle Guet Khim Tan
- Clinical Translational Sciences, Singapore General Hospital, The Academia Level 9, 20 College Road, Singapore, 169856, Singapore
| | - Chandramouli Nagarajan
- Department of Haematology, Singapore General Hospital, The Academia, Level 3, 20 College Road, Singapore, 169856, Singapore
| | - Dachuan Huang
- Lymphoma Genomic Translational Research Laboratory, Division of Cellular and Molecular Research, National Cancer Centre Singapore, 11 Hospital Drive, Singapore, 169610, Singapore
| | - Pang Wan Lu
- Lymphoma Genomic Translational Research Laboratory, Division of Cellular and Molecular Research, National Cancer Centre Singapore, 11 Hospital Drive, Singapore, 169610, Singapore
| | - Jing Quan Lim
- Lymphoma Genomic Translational Research Laboratory, Division of Cellular and Molecular Research, National Cancer Centre Singapore, 11 Hospital Drive, Singapore, 169610, Singapore
| | - Sharon Barrans
- Haematological Malignancy Diagnostic Service (HMDS), St. James's Institute of Oncology, Leeds, UK
| | - Choon Kiat Ong
- Lymphoma Genomic Translational Research Laboratory, Division of Cellular and Molecular Research, National Cancer Centre Singapore, 11 Hospital Drive, Singapore, 169610, Singapore.,Cancer and Stem Cell Biology, Duke-NUS Medical School, 8 College Road, Singapore, 169857, Singapore.,Genome Institute of Singapore, 60 Biopolis Street Genome, Singapore, 138672, Singapore
| | - Soon Thye Lim
- Director's office, National Cancer Centre Singapore, 11 Hospital Drive, Singapore, 169610, Singapore.,Office of Education, Duke-NUS Medical School, 8 College Road, Singapore, 169857, Singapore
| | - Wee Joo Chng
- National University Cancer Institute, Singapore, Singapore.,Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore.,NUS Center for Cancer Research (N2CR) and Dept of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - George Follows
- Addenbrooke's Hospital NHS Foundation Trust, Cambridge, UK
| | | | - Ming Qing Du
- Department of Pathology, University of Cambridge, Cambridge, UK
| | - Yeow Tee Goh
- Department of Haematology, Singapore General Hospital, The Academia, Level 3, 20 College Road, Singapore, 169856, Singapore
| | - Suat Hoon Tan
- National Skin Centre Singapore, 1 Mandalay Road, Singapore, 308205, Singapore
| | - Nicholas Francis Grigoropoulos
- Department of Haematology, Singapore General Hospital, The Academia, Level 3, 20 College Road, Singapore, 169856, Singapore. .,Cancer and Stem Cell Biology, Duke-NUS Medical School, 8 College Road, Singapore, 169857, Singapore.
| | - Navin Kumar Verma
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, 11 Mandalay Road, Clinical Sciences Building, Singapore, 308232, Singapore. .,National Skin Centre Singapore, 1 Mandalay Road, Singapore, 308205, Singapore.
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Merron B, Kazmi-Stokes S, Cummin T, Barrans S, Araf S, Korfi K, Pascua LDL, Caddy J, Cozens K, Cucco F, Uddin R, Sha C, Tooze R, Griffiths G, Du MQ, Burton C, Westhead D, Fitzgibbon J, Schuh A, Davies A, Johnson P. Precision medicine for patients with lymphoma; the Bloodwise Precision Medicine for Aggressive Lymphomas (PMAL) consortium. Clin Med (Lond) 2019. [DOI: 10.7861/clinmedicine.19-2-s100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Jiang H, Bian Z, Tai BJ, Du MQ, Peng B. The Effect of a Bi-annual Professional Application of APF Foam on Dental Caries Increment in Primary Teeth: 24-month Clinical Trial. J Dent Res 2016; 84:265-8. [PMID: 15723868 DOI: 10.1177/154405910508400311] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The purpose of this study was to evaluate the effect of a bi-annual professional application of acidulated phosphate fluoride (APF) foam on caries increment in the primary dentition over a two-year period in the People’s Republic of China. In a double-blind, cluster-randomized, placebo-controlled trial, 392 children aged 3–4 years from 15 classes were randomly assigned to two groups on a school class basis. The experimental group (8 classes) received a bi-annual APF foam application, and the control group (7 classes) received the placebo. The mean increment of dmfs in the experimental group was 24.2% lower than that in the control group (p < 0.05). The significant caries reduction was observed on approximal surfaces in the experimental group compared with the control group (p < 0.01), but there were no differences on occlusal surfaces (p > 0.05). A bi-annual professional application of APF foam was effective in reducing the increment of dental caries in the primary teeth.
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Affiliation(s)
- H Jiang
- Department of Preventive Dentistry, School of Stomatology, Wuhan University, Luoyu Road 237, Wuhan City, China 430079
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Chen X, Du MQ, Fan MW, Mulder J, Huysmans MCDNJM, Frencken JE. Caries-preventive effect of sealants produced with altered glass-ionomer materials, after 2 years. Dent Mater 2012; 28:554-60. [PMID: 22300651 DOI: 10.1016/j.dental.2012.01.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Revised: 11/22/2011] [Accepted: 01/04/2012] [Indexed: 11/24/2022]
Abstract
OBJECTIVES The aim of the present study was to investigate the caries-preventive effect of sealants produced with a high-viscosity glass-ionomer with an elevated powder-liquid ratio (ART), of having energy added to this glass-ionomer, and that of glass-carbomer, in comparison to that of resin composite sealants. METHODS The randomized controlled trial covered 407 children, with a mean age of 8 years. At a school compound three dentists placed sealants in pits and fissures of high caries-risk children. Evaluation by two independent evaluators was conducted after 0.5, 1 and 2 years. The Kaplan-Meier survival method, ANOVA and t-test were used in analyzing the data. RESULTS 1352 first permanent molars were sealed. 6.6% of children and 6.8% of sealants dropped out within 2 years. 27 re-exposed pits and fissures, 20 in occlusal and 7 in smooth surfaces, in 25 children, developed a dentin carious lesion. The cumulative survival of dentin carious lesion-free pits and fissures in the glass-carbomer sealant group was statistically significantly lower (97.4%) than those in the high-viscosity glass-ionomer with energy supplied (99%) and the resin-composite (98.9%) sealant groups. There was no statistically significant difference in the cumulative survival of dentin carious lesion-free pits and fissures, between the high-viscosity glass-ionomer with (99%) and without (98.3%) energy supplied sealant groups, after 2 years. SIGNIFICANCE The survival of dentin carious lesion-free pits and fissures was high in all sealant types. More dentin carious lesions were observed in the glass-carbomer sealant group.
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Affiliation(s)
- X Chen
- Preventive Department, Key Laboratory for Oral Biomedical Engineering, School and Hospital of Stomatology, Wuhan University, PR China
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5
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Ruskoné-Fourmestraux A, Fischbach W, Aleman BMP, Boot H, Du MQ, Megraud F, Montalban C, Raderer M, Savio A, Wotherspoon A. EGILS consensus report. Gastric extranodal marginal zone B-cell lymphoma of MALT. Gut 2011; 60:747-58. [PMID: 21317175 DOI: 10.1136/gut.2010.224949] [Citation(s) in RCA: 218] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This consensus report of the EGILS (European Gastro-Intestinal Lymphoma Study) group includes recommendations on the management of gastric extranodal marginal zone B-cell lymphoma of MALT. They are based on data from the literature and on intensive discussions and votings of the experts during their annual meetings.
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Affiliation(s)
- A Ruskoné-Fourmestraux
- Department of Gastroenterology, Hôpital St Antoine, 184 rue du Fg Saint Antoine, 75012 Paris, France.
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Jiang H, Du MQ, Huang W, Peng B, Bian Z, Tai BJ. The prevalence of and risk factors for non-carious cervical lesions in adults in Hubei Province, China. Community Dent Health 2011; 28:22-28. [PMID: 21485230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
OBJECTIVES To describe the prevalence of non-carious cervical lesions (NCCLs) and to assess the relative affects of risk factors on NCCLs in middle-aged and elderly people in Hubei Province, China. DESIGN A sample of 2,160 adults, aged 35-44 years and 65-74 years and balanced by age, gender, and urbanization, participated in the cross sectional epidemiological survey. Non-carious cervical lesions were examined using a modified Tooth Wear Index. Data were collected based on structured questionnaires that assessed general information as well as oral health. RESULTS The prevalence of non-carious cervical lesions was 38.8% for 35-44-year-olds and 56.6% for 65-74-year-olds. The first premolars, canines, and second premolars showed the highest prevalence of lesions, while the second molars demonstrated the least. Several risk factors such as age (OR = 2.45, p < 0.001), location (OR = 1.68, p = 0.001), frequency of toothbrushing (OR = 1.33, p = 0.016), bruxism (OR = 1.37, p < 0.001), and family income (OR = 1.44, p < 0.001) were found to be associated with lesion occurrence. CONCLUSIONS The prevalence of non-carious cervical lesions was relatively high in the middle-aged and elderly persons in China and was also associated with socio-behavioural risk factors.
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Affiliation(s)
- H Jiang
- Department of Preventive Dentistry, School and Hospital of Stomatology, Wuhan University, Wuhan City, China
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7
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Chanudet E, Ye H, Ferry J, Bacon CM, Adam P, Müller-Hermelink HK, Radford J, Pileri SA, Ichimura K, Collins VP, Hamoudi RA, Nicholson AG, Wotherspoon AC, Isaacson PG, Du MQ. A20 deletion is associated with copy number gain at the TNFA/B/C locus and occurs preferentially in translocation-negative MALT lymphoma of the ocular adnexa and salivary glands. J Pathol 2009; 217:420-30. [PMID: 19006194 DOI: 10.1002/path.2466] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The genetic basis of MALT lymphoma is largely unknown. Characteristic chromosomal translocations are frequently associated with gastric and pulmonary cases, but are rare at other sites. We compared the genetic profiles of 33 ocular adnexal and 25 pulmonary MALT lymphomas by 1 Mb array-comparative genomic hybridization (CGH) and revealed recurrent 6q23 losses and 6p21.2-6p22.1 gains exclusive to ocular cases. High-resolution chromosome 6 tile-path array-CGH identified NF-kappaB inhibitor A20 as the target of 6q23.3 deletion and TNFA/B/C locus as a putative target of 6p21.2-22.1 gain. Interphase fluorescence in situ hybridization showed that A20 deletion occurred in MALT lymphoma of the ocular adnexa (8/42=19%), salivary gland (2/24=8%), thyroid (1/9=11%) and liver (1/2), but not in the lung (26), stomach (45) and skin (13). Homozygous deletion was observed in three cases. A20 deletion and TNFA/B/C gain were significantly associated (p<0.001) and exclusively found in cases without characteristic translocation. In ocular cases, A20 deletion was associated with concurrent involvement of different adnexal tissues or extraocular sites at diagnosis (p=0.007), a higher proportion of relapse (67% versus 37%) and a shorter relapse-free survival (p=0.033). A20 deletion and gain at TNFA/B/C locus may thus play an important role in the development of translocation-negative MALT lymphoma.
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Affiliation(s)
- E Chanudet
- Division of Molecular Histopathology, Department of Pathology, University of Cambridge, UK
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MESH Headings
- Aged
- Cell Transformation, Neoplastic/genetics
- Chromosomes, Human, Pair 11
- Chromosomes, Human, Pair 18
- Female
- Humans
- Lymphoma, B-Cell, Marginal Zone/genetics
- Lymphoma, B-Cell, Marginal Zone/pathology
- Male
- Middle Aged
- Translocation, Genetic
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Du MQ, Tai BJ, Jiang H, Lo ECM, Fan MW, Bian Z. A two-year randomized clinical trial of chlorhexidine varnish on dental caries in Chinese preschool children. J Dent Res 2006; 85:557-9. [PMID: 16723655 DOI: 10.1177/154405910608500615] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The objective of this study was to assess the effect of six-monthly professional applications of chlorhexidine varnish on the prevention of dental caries in primary molars in Chinese preschool children. In a double-blinded, randomized, placebo-controlled clinical trial, 334 children aged 4-5 years were randomly divided into two groups. Children in the test group received six-monthly applications of a 40% chlorhexidine varnish, and the control children received a placebo varnish. Caries status of the children was assessed by two calibrated examiners at baseline and after 24 months, according to criteria recommended by the World Health Organization. The two-year mean caries increments in the test and the control group children were 1.0 and 1.6 decayed, missing, or filled molar surfaces (dmfs-molar), respectively, a 37.3% reduction (t test, p = 0.036). No side-effects were found. It was concluded that six-monthly applications of chlorhexidine varnish were effective in reducing the incidence of dental caries in primary molars.
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Affiliation(s)
- M Q Du
- Department of Preventive Dentistry, School of Stomatology, Wuhan University, Hubei, China
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11
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Luo Y, Zeng XJ, Du MQ, Bedi R. The prevalence of dental erosion in preschool children in China. J Dent 2005; 33:115-21. [PMID: 15683892 DOI: 10.1016/j.jdent.2004.08.007] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2004] [Revised: 08/19/2004] [Accepted: 08/24/2004] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVE To describe the prevalence of dental erosion and associated factors in preschool children in Guangxi and Hubei provinces of China. METHODS Dental examinations were carried out on 1949 children aged 3-5 years. Measurement of erosion was confined to primary maxillary incisors. The erosion index used was based upon the 1993 UK National Survey of Children's Dental Health. The children's general information as well as social background and dietary habits were collected based on a structured questionnaire. RESULTS A total of 112 children (5.7%) showed erosion on their maxillary incisors. Ninety-five (4.9%) was scored as being confined to enamel and 17 (0.9%) as erosion extending into dentine or pulp. There was a positive association between erosion and social class in terms of parental education. A significantly higher prevalence of erosion was observed in children whose parents had post-secondary education than those whose parents had secondary or lower level of education. There was also a correlation between the presence of dental erosion and intake of fruit drink from a feeding bottle or consumption of fruit drinks at bedtime. CONCLUSION Erosion is not a serious problem for dental heath in Chinese preschool children. The prevalence of erosion is associated with social and dietary factors in this sample of children.
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Affiliation(s)
- Y Luo
- Dental Public Health, Faculty of Dentistry, University of Hong Kong, Hong Kong SAR, China
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Obermann EC, Diss TC, Hamoudi RA, Munson P, Wilkins BS, Camozzi MLP, Isaacson PG, Du MQ, Dogan A. Loss of heterozygosity at chromosome 9p21 is a frequent finding in enteropathy-type T-cell lymphoma. J Pathol 2004; 202:252-62. [PMID: 14743509 DOI: 10.1002/path.1506] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Enteropathy-type T-cell lymphoma (ETL) and ulcerative jejunitis (UJ) are rare disorders often occurring in patients with coeliac disease. The genetic events associated with the accumulation of intraepithelial lymphocytes in coeliac disease and tumour development are largely unknown. Deletions at chromosome 9p21, which harbours the tumour suppressor genes p14/ARF, p15/INK4b, and p16/INK4a, and 17p13, where p53 is located, are associated with the development and progression of lymphomas. To examine whether deletions at 9p21 and 17p13 play a role in ETL, 22 cases of ETL and seven cases of UJ were screened for loss of heterozygosity (LOH) by tissue microdissection and polymerase chain reaction (PCR) analysis for microsatellite markers. Furthermore, p53 and p16 protein expression was examined by immunohistochemistry. In addition, polymerase chain reaction-single strand conformational polymorphism (PCR-SSCP) analysis for detection of mutations in exons 5-8 of the p53 gene was performed in five cases of ETL and three cases of UJ. LOH was found in at least one microsatellite marker at the 9p21 locus in 8 of 22 (36%) ETLs, but not in UJ. Five of nine (56%) tumours composed of large cells showed LOH at 9p21, as opposed to two of eight (25%) tumours with small- or medium-sized cell morphology. The region spanning the p14/p15/p16 gene locus was most frequently affected (five cases); LOH at these markers coincided with loss of p16 protein expression in all of these cases. p53 overexpression was demonstrated in all ETLs examined and in four of seven cases of UJ. However, no alterations of the p53 gene were detected by LOH or PCR-SSCP analysis. The results of this study show that LOH at chromosome 9p21 is frequent in ETL, especially in tumours with large cell morphology; this finding suggests that gene loss at this locus may play a role in the development of ETL.
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Affiliation(s)
- E C Obermann
- Department of Histopathology, University College London, UK
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Isaacson PG, Du MQ. Gastric lymphomas: genetics and resistance to H. pylori eradication. Verh Dtsch Ges Pathol 2003; 87:116-22. [PMID: 16888902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Gastric mucosa associated lymphoid tissue (MALT) lymphoma is a histologically distinct tumour derived from MALT acquired as a result of Helicobacter pylori infection. Eradication of H. pylori causes clinical regression of the lymphoma n 75 % of cases. In seeking to identify those cases resistant to this therapy, and in the interests of further understanding the biology of MALT lymphoma, genetic alterations of MALT lymphomas have been investigated. Three translocations, t(11;18)(q21; q21), t(1;14)(p22;q32) and t(14;18)(q32;q21) are specifically associated with MALT lymphoma and the genes involved have been identified. T(11;18) results in a chimeric fusion between the API2 and MALT1 genes and is specifically associated with gastric MALT lymphomas that do not respond to eradication of H. pylori. T(1; 14) and t(14; 18) deregulate bcl-10 and MALT1 expression respectively. These three chromosomal translocations that involve different genes appear to share common oncogenic properties by targeting the to target the same NFkappaB oncogenic pathway.
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Affiliation(s)
- P G Isaacson
- Department of Histopathology, University College London, UK
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Abstract
BACKGROUND p53 mutations are frequently observed in colorectal carcinomas but they have also been found in colorectal adenomas, although considerably less frequently. AIMS To explore p53 mutations in benign tumours, we have screened 70 colorectal adenomas for allelic loss at, and point mutations in, TP53 by analysis of selected microdissected cell populations. RESULTS Sixteen (22.8%) adenomas were found to have allelic loss, of which 11 (15.7%) had p53 mutations. In adenomas with mild, moderate, or severe dysplasia, mutation or allelic loss occurred in 4.8%, 16.7%, and 52.6%, respectively (p<0.001). Seven different mutations were found, all missense changes or inframe deletions: one (Thr150Arg) has not been found before while three (Gln144His, Gly245Arg, and Glu285Gln) have not been described previously in colorectal tumours. The other three mutations (Arg175Gly, DeltaPro190, and Gly245Ser) have been found in colorectal carcinomas, the last commonly. Adenomas harboured a spectrum of p53 mutations which was significantly different from cancers as regards the position in the gene and a higher frequency of G-->C/C-->G changes. CONCLUSIONS Combining our data on adenomas with data already published and in comparison with the spectrum of mutations in colorectal carcinomas, it is suggested that some p53 mutations have a weaker effect than others and are therefore more likely to be found in adenomas which have not progressed to carcinomas.
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Affiliation(s)
- X P Hao
- Academic Department of Pathology and Colorectal Cancer Unit, Imperial Cancer Research Fund, St Mark's Hospital, Harrow HA1 3UJ, UK
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Abstract
AIMS Clonality analysis using polymerase chain reaction (PCR) amplification of the immunoglobulin heavy chain (IgH) gene is an important aid to the diagnosis of B cell lymphoproliferative diseases. However, the method has a relatively high false negative rate. In an attempt to improve detection rates simple PCR strategies for clonality analysis of B cell populations using amplification of Ig light chain genes have been developed. METHODS Novel PCR protocols, designed to amplify Ig kappa and Ig lambda light chain genes, were evaluated using high molecular weight DNA samples from 28 selected cases of B cell lymphoma with known light chain expression and 12 reactive lymphoid specimens. Products were run on 10% polyacrylamide minigels using heteroduplex analysis. Conventional IgH PCR analysis was also performed. Twelve randomly selected formalin fixed, paraffin wax processed samples from cases submitted for molecular genetic analysis were also studied. RESULTS Polyclonal products were seen in all reactive lymphoid samples. Using Ig kappa PCR, 24 of 28 lymphomas, including four of five IgH negative cases, displayed monoclonal patterns. Using Ig lambda PCR, eight of 12 Ig lambda expressing tumours, including two of five IgH negative cases, showed monoclonal patterns. Standard IgH PCR demonstrated monoclonality in 23 of 28 B cell lymphomas. The detection rate was improved to 27 of 28 lymphomas using heavy and light chain PCR. Efficient amplification was achieved using paraffin wax processed samples, seven of which showed monoclonality compared with eight using IgH PCR. CONCLUSIONS Ig light chain PCR, used in conjunction with heavy chain analysis, enables improved detection of B cell monoclonality using routine histological specimens and can provide additional clone specific markers for the study of the biology of B cell tumours.
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Affiliation(s)
- T C Diss
- Histopathology Department, Royal Free and University College Medical School, University Street, London WC1E 6JJ, UK.
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Liu H, Ye H, Dogan A, Ranaldi R, Hamoudi RA, Bearzi I, Isaacson PG, Du MQ. T(11;18)(q21;q21) is associated with advanced mucosa-associated lymphoid tissue lymphoma that expresses nuclear BCL10. Blood 2001; 98:1182-7. [PMID: 11493468 DOI: 10.1182/blood.v98.4.1182] [Citation(s) in RCA: 190] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The development of gastric mucosa-associated lymphoid tissue (MALT) lymphoma is a multistep process and can be clinico-pathologically divided into Helicobacter pylori-associated gastritis, low-grade tumors, and high-grade tumors. The molecular events underlying this progression are largely unknown. However, identification of the genes involved in MALT lymphoma-specific t(11;18)(q21;q21) and t(1;14)(p22;q32) has provided fresh insights into the pathogenesis of this disease. T(11;18)(q21;q21) results in a chimeric transcript between the API2 and the MALT1 genes, whereas t(1;14) (p22;q32) causes aberrant nuclear BCL10 expression. Significantly, nuclear BCL10 expression also occurs frequently in MALT lymphomas without t(1;14)(p22;q32), suggesting an important role for BCL10 in lymphoma development. Thirty-three cases of H pylori gastritis, 72 MALT lymphomas, and 11 mucosal diffuse large B-cell lymphomas (DLBCL) were screened for t(11;18)(q21;q21) by reverse transcription-polymerase chain reaction followed by sequencing. BCL10 expression in lymphoma cases was examined by immunohistochemistry. The API2--MALT1 fusion transcript was not detected in H pylori gastritis and mucosal DLBCL but was found in 25 of 72 (35%) MALT lymphomas of various sites. Nuclear BCL10 expression was seen in 28 of 53 (53%) of MALT lymphomas. Of the gastric cases, the largest group studied, the frequency of both t(11;18)(q21;q21) and nuclear BCL10 expression was significantly higher in tumors that showed dissemination to local lymph nodes or distal sites (14 of 18 = 78% and 14 of 15 = 93%, respectively) than those confined to the stomach (3 of 29 = 10% and 10 of 26 = 38%). Furthermore, t(11;18)(q21;q21) closely correlated with BCL10 nuclear expression. These results indicate that both t(11;18)(q21;q21) and BCL10 nuclear expression are associated with advanced MALT lymphoma and that their oncogenic activities may be related to each other. (Blood. 2001;98:1182-1187)
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MESH Headings
- Adaptor Proteins, Signal Transducing
- Adult
- Aged
- B-Cell CLL-Lymphoma 10 Protein
- Biomarkers/analysis
- Chromosome Aberrations/pathology
- Chromosome Disorders
- Chromosomes, Human, Pair 11/genetics
- Chromosomes, Human, Pair 18/genetics
- Disease Progression
- Female
- Humans
- Lymphoma, B-Cell, Marginal Zone/etiology
- Lymphoma, B-Cell, Marginal Zone/genetics
- Lymphoma, B-Cell, Marginal Zone/metabolism
- Male
- Middle Aged
- Neoplasm Proteins/metabolism
- Nuclear Proteins/metabolism
- Oncogene Proteins, Fusion/genetics
- RNA, Messenger/analysis
- Stomach Neoplasms/etiology
- Stomach Neoplasms/genetics
- Stomach Neoplasms/metabolism
- Translocation, Genetic/genetics
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Affiliation(s)
- H Liu
- Department of Histopathology, Royal Free and University College Medical School, London, United Kingdom
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17
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Du MQ, Liu H, Diss TC, Ye H, Hamoudi RA, Dupin N, Meignin V, Oksenhendler E, Boshoff C, Isaacson PG. Kaposi sarcoma-associated herpesvirus infects monotypic (IgM lambda) but polyclonal naive B cells in Castleman disease and associated lymphoproliferative disorders. Blood 2001; 97:2130-6. [PMID: 11264181 DOI: 10.1182/blood.v97.7.2130] [Citation(s) in RCA: 249] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In a previous study, it was shown that the Kaposi sarcoma-associated herpesvirus (KSHV) was specifically associated with monotypic (IgMlambda) plasmablasts in multicentric Castleman disease (MCD). The plasmablasts occur as isolated cells in the mantle zone of B-cell follicles but may form microlymphoma or frank plasmablastic lymphoma. To determine the clonality and cellular origin of the monotypic plasmablasts, the rearranged Ig genes in 13 patients with KSHV-related MCD, including 8 cases with microlymphomas and 2 with frank lymphomas, were studied. To investigate the role of the interleukin 6 (IL-6) receptor signaling in the pathogenesis of MCD and associated lymphoproliferative disorders, viral IL-6 and human IL-6 receptor expression was examined. KSHV-positive plasmablasts were polyclonal in MCD-involved lymphoid tissues in all cases and microlymphomas in 6 of 8 cases. Monoclonal KSHV-positive plasmablasts were seen in microlymphomas of 2 cases and in both frank lymphomas. Despite their mature phenotype, KSHV-positive plasmablasts did not harbor somatic mutations in the rearranged Ig genes, indicating origination from naive B cells. Viral IL-6 was expressed in 10% to 15% of KSHV-positive plasmablasts, whereas the human IL-6 receptor was expressed in most KSHV-positive cells. Thus, KSHV infects monotypic but polyclonal naive B cells and is associated with a range of lymphoproliferative disorders from polyclonal isolated plasmablasts and microlymphomas to monoclonal microlymphoma and frank plasmablastic lymphomas in MCD patients. Activation of the IL-6 receptor signaling pathway may play a role in differentiation of KSHV-infected naive B cells into plasmablasts and development of lymphoproliferative lesions. (Blood. 2001;97:2130-2136)
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Affiliation(s)
- M Q Du
- Department of Histopathology, Royal Free and University College Medical School, University College London, London, United Kingdom.
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18
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Low W, Harries M, Ye H, Du MQ, Boshoff C, Collins M. Internal ribosome entry site regulates translation of Kaposi's sarcoma-associated herpesvirus FLICE inhibitory protein. J Virol 2001; 75:2938-45. [PMID: 11222719 PMCID: PMC115920 DOI: 10.1128/jvi.75.6.2938-2945.2001] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2000] [Accepted: 12/15/2000] [Indexed: 12/16/2022] Open
Abstract
The gammaherpesvirus Kaposi's sarcoma-associated herpesvirus (KSHV) (or human herpesvirus 8) is associated with the endothelial tumor Kaposi's sarcoma (KS) and lymphoproliferative disorders in immunocompromised individuals. Only a small number of viral proteins are expressed in B cells latently infected with KSHV; here we characterize the mechanism of expression of one of these, the viral FLICE inhibitory protein v-FLIP (K13, ORF71). The v-FLIP coding region is present in a bicistronic message, following the v-cyclin coding region. Using both in vitro translation and cell transfection assays, we have identified an internal ribosome entry site (IRES) preceding the v-FLIP start codon and overlapping the v-cyclin (ORF 72) coding region, which allows v-FLIP translation. Using an antibody against v-FLIP we have detected expression of the endogenous protein in latently infected KSHV-positive primary effusion lymphoma (PEL) cell lines. Induction of apoptosis by serum withdrawal from PEL cells results in a relative increase in v-FLIP synthesis, as previously described for some cellular proteins translated from IRES.
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Affiliation(s)
- W Low
- Windeyer Institute of Medical Sciences, University College London, United Kingdom
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19
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Welzel N, Le T, Marculescu R, Mitterbauer G, Chott A, Pott C, Kneba M, Du MQ, Kusec R, Drach J, Raderer M, Mannhalter C, Lechner K, Nadel B, Jaeger U. Templated nucleotide addition and immunoglobulin JH-gene utilization in t(11;14) junctions: implications for the mechanism of translocation and the origin of mantle cell lymphoma. Cancer Res 2001; 61:1629-36. [PMID: 11245476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
The t(11;14)(q13;q32) between the BCL-1 and immunoglobulin heavy chain gene (IgH) loci in mantle cell lymphoma (MCL) are believed to be mediated by the mechanism of V(D)J recombination similar to the t(14; 18) in follicular lymphoma (FL). We have recently shown that the t(14;18) event creates staggered double-strand breaks in the BCL-2 locus, and that the t(14;18) junctions contain templated nucleotide insertions (T-nucleotides; U. Jäger et al., Blood, 95: 3520-3529, 2000). Reasoning that the earlier (pregerminal center) B-cell origin of MCL might be reflected in a different molecular structure of the chromosomal breakpoints, we PCR-amplified diagnostic samples from 93 patients. Thirty-six samples (39%) were positive for the direct (BCL-1/J(H)) and 23 for both direct and reciprocal (D(H)/BCL-1) junctions. The breaks on chromosome 14 exhibited features of V(D)J-mediated recombination as shown by D(H) and J(H) coding end processing. However, duplications of BCL-1 sequences in 39% of the 23 patients indicate staggered double-strand breaks in the major translocation cluster region (MTC). This is incompatible with V(D)J recombination and indicates a different mechanism of cleavage. The use of J(H)6 in the junctions (39%) was similar to that in the immunoglobulin genes of normal B cells and B-CLL, but considerably less than in FL. Only 2 of 36 samples contained a BCL-1/DJ(H) rearrangement, which was indicative of a previous DJ(H) rearrangement. Most importantly, 19% of the BCL-1/IgH junctions with inserts of > or =5 nucleotides contained error-prone copies (T-nucleotides) of 8-12 nucleotides originating from the surrounding BCL-1 or IgH regions, a lower rate than in FL. No correlation was found between the addition of T-nucleotides and the rate of somatic mutation in the immunoglobulin genes. We conclude that the t(11;14) and t(14;18) use the same basic mechanism of translocation including V(D)J-mediated recombination, double-strand staggered breaks, and template-dependent, error-prone DNA-synthesis. However, the distinct differences in the utilization of J(H) regions suggest that the t(11;14) occurs predominantly during an attempted primary D(H)-J(H) rearrangement in early B cells, whereas the t(14;18) mostly occurs during secondary rearrangement. This is in agreement with the pregerminal center B-cell origin of MCL.
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MESH Headings
- Base Sequence
- Chromosome Breakage/genetics
- Chromosomes, Human, Pair 11
- Chromosomes, Human, Pair 14
- DNA Transposable Elements/genetics
- Gene Rearrangement, B-Lymphocyte, Heavy Chain/genetics
- Genes, Immunoglobulin/genetics
- Genes, bcl-1/genetics
- Humans
- Immunoglobulin Heavy Chains/genetics
- Immunoglobulin Idiotypes/genetics
- Immunoglobulin J-Chains/genetics
- Lymphoma, Mantle-Cell/genetics
- Molecular Sequence Data
- Polymerase Chain Reaction
- Templates, Genetic
- Translocation, Genetic/genetics
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Affiliation(s)
- N Welzel
- Department of Internal Medicine, University of Vienna, Austria
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20
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Liu H, Ruskon-Fourmestraux A, Lavergne-Slove A, Ye H, Molina T, Bouhnik Y, Hamoudi RA, Diss TC, Dogan A, Megraud F, Rambaud JC, Du MQ, Isaacson PG. Resistance of t(11;18) positive gastric mucosa-associated lymphoid tissue lymphoma to Helicobacter pylori eradication therapy. Lancet 2001; 357:39-40. [PMID: 11197361 DOI: 10.1016/s0140-6736(00)03571-6] [Citation(s) in RCA: 346] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
20-30% of gastric mucosa-associated lymphoid tissue (MALT) lymphoma associated with Helicobacter pylori do not regress after antibiotic therapy. Regression can be assessed only by extended follow-up. To assess whether t(11;18, q21;q21), which results in a chimeric transcript between the AP12 and MLT genes, predicts lymphoma resistance to antibiotic therapy, we screened for the fusion transcript with RT-PCR in ten responsive and 12 non-responsive gastric MALT lymphomas. The AP12-MLT transcript was detected in nine (75%) of 12 patients non-responsive to antibiotic therapy but not in responsive patients. Most H pylori-associated gastric MALT lymphomas that do not respond to antibiotic therapy are associated with t(11;18, q21;q21).
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MESH Headings
- Adult
- Aged
- Anti-Bacterial Agents/therapeutic use
- Chromosomes, Human, Pair 11/genetics
- Chromosomes, Human, Pair 18/genetics
- Drug Resistance, Neoplasm
- Female
- Helicobacter Infections/drug therapy
- Helicobacter Infections/microbiology
- Helicobacter pylori/drug effects
- Humans
- Lymphoma, B-Cell, Marginal Zone/drug therapy
- Lymphoma, B-Cell, Marginal Zone/genetics
- Lymphoma, B-Cell, Marginal Zone/microbiology
- Male
- Middle Aged
- Oncogene Proteins, Fusion/genetics
- RNA, Neoplasm/genetics
- RNA, Neoplasm/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Stomach Neoplasms/drug therapy
- Stomach Neoplasms/genetics
- Stomach Neoplasms/microbiology
- Translocation, Genetic
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21
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Bertin J, Guo Y, Wang L, Srinivasula SM, Jacobson MD, Poyet JL, Merriam S, Du MQ, Dyer MJ, Robison KE, DiStefano PS, Alnemri ES. CARD9 is a novel caspase recruitment domain-containing protein that interacts with BCL10/CLAP and activates NF-kappa B. J Biol Chem 2000; 275:41082-6. [PMID: 11053425 DOI: 10.1074/jbc.c000726200] [Citation(s) in RCA: 179] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
BCL10/CLAP is an activator of apoptosis and NF-kappaB signaling pathways and has been implicated in B cell lymphomas of mucosa-associated lymphoid tissue. Although its role in apoptosis remains to be determined, BCL10 likely activates NF-kappaB through the IKK complex in response to upstream stimuli. The N-terminal caspase recruitment domain (CARD) of BCL10 has been proposed to function as an activation domain that mediates homophilic interactions with an upstream CARD-containing NF-kappaB activator. To identify upstream signaling partners of BCL10, we performed a mammalian two-hybrid analysis and identified CARD9 as a novel CARD-containing protein that interacts selectively with the CARD activation domain of BCL10. When expressed in cells, CARD9 binds to BCL10 and activates NF-kappaB. Furthermore, endogenous CARD9 is found associated with BCL10 suggesting that both proteins form a pre-existing signaling complex within cells. CARD9 also self-associates and contains extensive coiled-coil motifs that may function as oligomerization domains. We propose here that CARD9 is an upstream activator of BCL10 and NF-kappaB signaling.
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Affiliation(s)
- J Bertin
- Millennium Pharmaceuticals, Inc., Cambridge, Massachusetts 02139, USA.
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22
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Abstract
The development of low-grade gastric mucosa-associated lymphoid tissue (MALT) lymphoma is closely associated with Helicobacter pylori infection. Despite its indolent clinical course and prolonged localization to the site of origin, the lymphoma frequently presents with multifocal lesions. However, the true extent of tumour involvement in the gastric mucosa is unclear, since reactive appearing lymphocytic infiltrates are always present and could contain tumour cells that are not readily identifiable on cytological grounds. Gastrectomy specimens of four MALT lymphoma cases were studied by microdissection and clone-specific polymerase chain reaction (CS-PCR) and of a further case with t(1;14)(p22;q32) by immunohistochemistry for BCL10 protein, which acted as a tumour marker for tumour cells carrying the translocation. CS-PCR revealed that tumour cells were commonly present in histologically non-lymphomatous lymphocytic infiltrates microdissected from areas well separated from tumour lesions. Tumour cells were also frequently found in infiltrates microdissected from the resection margins. These findings were reinforced by direct identification of tumour cells, as recognized by strong BCL10 nuclear staining, in non-lymphomatous lymphocytic infiltrates in the case with t(1;14)(p22;q32). The results show that gastric MALT lymphoma disseminates widely within the gastric mucosa without necessarily forming diagnostic lesions.
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Affiliation(s)
- M Q Du
- Department of Histopathology, Royal Free and University College Medical School, London, UK
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23
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Cogliatti SB, Griesser H, Peng H, Du MQ, Isaacson PG, Zimmermann DR, Maibach RC, Schmid U. Significantly different bcl-2 expression profiles in gastric and non-gastric primary extranodal high-grade B-cell lymphomas. J Pathol 2000; 192:470-8. [PMID: 11113864 DOI: 10.1002/1096-9896(2000)9999:9999<::aid-path733>3.0.co;2-u] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Fifty-five cases of primary extranodal high-grade B-cell non-Hodgkin's lymphoma were investigated for bcl-2 and p53 protein expression as well as for t(14;18) translocations and p53 mutations. Phenotypic and genotypic profiles were compared between tumours of gastric (27 cases) and non-gastric (28 cases) origin. bcl-2 protein expression was significantly lower in gastric (11/27) than in non-gastric (28/28) lymphomas (p<0.0001), while nuclear p53 protein expression did not differ significantly between these two groups. In the stomach, there were no significant differences in either bcl-2 or p53 expression profiles between high-grade lymphomas with (n=14) and without (n=13) evidence of a low-grade component of MALT type. However, secondary high-grade lymphomas showed a significant down-regulation of bcl-2 protein (p<0.0001) and, conversely, an up-regulation of p53 protein (p<0.0001) as compared with their low-grade tumour components. In extranodal high-grade B-cell lymphomas, bcl-2 protein expression was not associated with t(14;18) translocation. Only one gastric lymphoma had a p53 point mutation with potential alteration of the amino acid sequence. These findings indicate that primary gastric high-grade B-cell lymphomas are immunohistologically distinct from primary extranodal high-grade B-cell lymphomas of an origin other than in the stomach.
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MESH Headings
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Chromosomes, Human, Pair 14
- Chromosomes, Human, Pair 18
- Gene Expression Regulation, Neoplastic
- Genes, p53
- Humans
- Immunoenzyme Techniques
- Lymphoma, B-Cell/genetics
- Lymphoma, B-Cell/metabolism
- Lymphoma, Non-Hodgkin/genetics
- Lymphoma, Non-Hodgkin/metabolism
- Neoplasm Proteins/genetics
- Neoplasm Proteins/metabolism
- Proto-Oncogene Proteins c-bcl-2/genetics
- Proto-Oncogene Proteins c-bcl-2/metabolism
- Stomach Neoplasms/genetics
- Stomach Neoplasms/metabolism
- Translocation, Genetic
- Tumor Suppressor Protein p53/metabolism
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Affiliation(s)
- S B Cogliatti
- Department of Pathology, State Hospital, St. Gallen, Switzerland.
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24
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Ye H, Dogan A, Karran L, Willis TG, Chen L, Wlodarska I, Dyer MJ, Isaacson PG, Du MQ. BCL10 expression in normal and neoplastic lymphoid tissue. Nuclear localization in MALT lymphoma. Am J Pathol 2000; 157:1147-54. [PMID: 11021819 PMCID: PMC1850175 DOI: 10.1016/s0002-9440(10)64630-5] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BCL10 is an apoptotic regulatory molecule identified through its direct involvement in t(1;14)(p22;q32) of mucosa-associated lymphoid tissue (MALT) lymphoma. We examined BCL10 protein expression in various normal tissues and B-cell lymphomas by immunohistochemistry of formalin-fixed and paraffin-embedded tissues using mouse BCL10 monoclonal antibodies. BCL10 protein was expressed in lymphoid tissue but not in 21 various other tissues with the exception of breast. In normal B-cell follicles, the protein was expressed abundantly in the germinal center B cells, moderately in the marginal zone, but only weakly in the mantle zone B cells. Irrespective of their stage of B-cell maturation, BCL10 was predominantly expressed in the cytoplasm. In contrast, each of the four MALT lymphomas with t(1;14)(p22;q32) showed strong BCL10 expression in both the nucleus and cytoplasm. Twenty of 36 (55%) MALT lymphomas lacking the translocation exhibited BCL10 expression in both the nucleus and cytoplasm although at a much lower level, whereas the remaining 16 cases displayed only cytoplasmic BCL10. Unlike MALT lymphoma, both follicular and mantle cell lymphomas generally displayed BCL10 expression compatible to their normal cell counterparts. Our results show differential expression of BCL10 protein among various B-cell populations of the B-cell follicle, indicating its importance in B-cell maturation. The subcellular localization of BCL10 was frequently altered in MALT lymphoma in comparison with its normal cell counterparts, suggesting that ectopic BCL10 expression may be important in the development of this type of tumor.
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Affiliation(s)
- H Ye
- Department of Histopathology, Royal Free and University College Medical School, London, United Kingdom
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25
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Du MQ, Peng H, Liu H, Hamoudi RA, Diss TC, Willis TG, Ye H, Dogan A, Wotherspoon AC, Dyer MJ, Isaacson PG. BCL10 gene mutation in lymphoma. Blood 2000; 95:3885-90. [PMID: 10845924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
BCL10 is directly involved in t(1;14)(p22;q32) of mucosa-associated lymphoid tissue (MALT) lymphoma. Wild-type BCL10 promoted apoptosis and suppressed malignant transformation in vitro, whereas truncated mutants lost the pro-apoptotic activity and exhibited gain of function enhancement of transformation. We studied 220 lymphomas for genomic BCL10 mutation by polymerase chain reaction-single-strand conformational polymorphism and DNA sequencing. Nineteen mutations were found in 13 lymphoma specimens, as follows: 8 of 120 (6.7%) mucosa-associated lymphoid tissue (MALT) lymphomas, 4 of 42 (9.5%) follicular lymphomas, and 1 of 23 (4.3%) diffuse large B-cell lymphomas. No mutations were found in 14 mantle cell lymphomas or 21 T-cell lymphomas. High-grade MALT lymphoma tended to show a slightly higher mutation frequency (2 of 25, 8%) than low-grade MALT tumor (6 of 95, 6.3%). Among low-grade gastric MALT lymphoma, mutations were found in 3 of 11 tumors that did not respond to Helicobacter pylori eradication therapy, but none were found in 22 tumors that regressed completely after H pylori eradication. All 14 potentially pathogenic mutations were distributed in the carboxyl terminal domain of BCL10. Deletion accounted for 10 of these mutations; 10 of 14 mutations caused truncated forms of BCL10. Western blot analysis of a mutant case confirmed the presence of truncated BCL10 products of anticipated size. Our results suggest that BCL10 mutation may play a pathogenic role in B-cell lymphoma development, particularly in aggressive and antibiotic unresponsive MALT lymphomas, and may further implicate the biologic importance of the carboxyl terminal of the molecule. (Blood. 2000;95:3885-3890)
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MESH Headings
- Adaptor Proteins, Signal Transducing
- Aged
- B-Cell CLL-Lymphoma 10 Protein
- Base Sequence
- Exons
- Female
- Humans
- Lymphoma, B-Cell/genetics
- Lymphoma, B-Cell/pathology
- Lymphoma, B-Cell, Marginal Zone/genetics
- Lymphoma, B-Cell, Marginal Zone/pathology
- Lymphoma, T-Cell/genetics
- Lymphoma, T-Cell/pathology
- Male
- Middle Aged
- Mutation
- Neoplasm Proteins/genetics
- Polymerase Chain Reaction
- Polymorphism, Single-Stranded Conformational
- Retrospective Studies
- Sequence Deletion
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Affiliation(s)
- M Q Du
- Department of Histopathology, Royal Free and University College London Medical School, London, United Kingdom.
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26
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Abstract
The Bcl10 gene was identified through characterization of the t(1;14)(p22;q32) associated with mucosa-associated lymphoid tissue (MALT) lymphoma. Bcl10 is implicated in the regulation of apoptosis and has been reported to be mutated in other subtypes of non-Hodgkin's B-cell lymphoma (B-NHL) and leukaemic cell lines, raising the possibility that its deregulation could be implicated in other forms of haematological malignancy. We screened 226 cases, including 123 acute myeloid leukaemia (AML), 50 acute lymphoblastic leukaemia (ALL), 20 chronic myeloid leukaemia (CML), 10 chronic lymphocytic leukaemia-prolymphocytic leukaemia (CLL/PLL) and 23 cases with 1p abnormalities, for Bcl10 mutations by reverse transcription polymerase chain reaction-single-stranded conformation polymorphism (RT-PCR/SSCP). Three known polymorphisms and two common splice variants were identified; however, no mutations were detected. One splice variant led to a 33-bp in frame deletion, whereas the other caused a 16-bp deletion predicting C-terminal truncation of Bcl10. However, both splice variants were also detected in normal bone marrow, suggesting that they are unlikely to be of pathogenetic significance. Furthermore, Southern blot analysis revealed no rearrangements of Bcl10 among 16 ALL and 11 cases of haematological malignancy with 1p abnormalities. Our results suggest that mutation of the Bcl10 gene as a mechanism of tumorigenesis is not associated with leukaemia.
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MESH Headings
- Adaptor Proteins, Signal Transducing
- Adult
- Aged
- Alternative Splicing
- B-Cell CLL-Lymphoma 10 Protein
- Blotting, Southern
- Chromosome Aberrations/genetics
- Chromosome Disorders
- Electrophoresis, Polyacrylamide Gel
- Humans
- Leukemia/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myeloid/genetics
- Leukemia, Prolymphocytic/genetics
- Middle Aged
- Mutation
- Neoplasm Proteins/genetics
- Polymorphism, Genetic
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/genetics
- Reverse Transcriptase Polymerase Chain Reaction
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Affiliation(s)
- D Grimwade
- Division of Medical and Molecular Genetics, Guy's, King's and St. Thomas' School of Medicine, London, UK.
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27
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Liu H, Peng H, Hamoudi R, Mullins PD, Ranaldi R, Bearzi I, Isaacson PG, Du MQ. A "G insertion" at nucleic acids 481 of the H. pylori fldA gene is not associated with gastric MALT lymphoma. Gastroenterology 2000; 118:988-9. [PMID: 10841646 DOI: 10.1016/s0016-5085(00)70196-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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28
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Dupin N, Diss TL, Kellam P, Tulliez M, Du MQ, Sicard D, Weiss RA, Isaacson PG, Boshoff C. HHV-8 is associated with a plasmablastic variant of Castleman disease that is linked to HHV-8-positive plasmablastic lymphoma. Blood 2000; 95:1406-12. [PMID: 10666218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023] Open
Abstract
Castleman disease (CD) is a lymphoproliferative disorder of unknown etiology that is associated with the development of secondary tumors, including B-cell lymphoma. Human herpesvirus 8 (HHV-8) (Kaposi's sarcoma-associated herpesvirus) sequences have been described in some cases of multicentric Castleman disease (MCD). Using a monoclonal antibody against an HHV-8-latent nuclear antigen, we show that HHV-8 is specifically associated with a variant of MCD in which HHV-8-positive plasmablasts that show lambda light-chain restriction localize in the mantle zone of B-cell follicles and coalesce to form microscopic lymphomas in some cases. Furthermore, we show that the frank plasmablastic lymphoma that develops in patients with this plasmablastic variant of MCD is also positive for HHV-8 and lambda light chain. Plasmablastic lymphoma associated with MCD is a new disease entity associated with HHV-8 infection. (Blood. 2000;95:1406-1412)
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Affiliation(s)
- N Dupin
- Departments of Oncology, Molecular Pathology and Histopathology, University College London, UK
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29
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Abstract
AIMS Parvovirus B19 has been demonstrated in testes of patients with germ cell tumours but not in controls, raising the possibility that the virus has an aetiological role in these tumours. The aims of this study were to investigate the association of the virus with germ cell tumours and to localise the virus histologically. METHODS DNA was extracted from paraffin wax embedded sections of testes from 10 seminomas, eight teratomas, two mixed seminoma/teratomas, and 10 testes showing benign histology. Polymerase chain reaction (PCR) amplification of three regions within the NS and VP1/2 genes was carried out in duplicate on all samples. One PCR positive case (seminoma/teratoma) was examined by microdissection of histologically defined tissue components followed by PCR amplification of parvoviral sequences. Samples from PCR positive patients were immunostained using a B19 specific monoclonal antibody. RESULTS Seven cases were PCR positive, these comprised two of 10 seminomas, one of two mixed tumours, none of eight teratomas, and four of 10 benign controls. PCR analysis of the material microdissected from the seminoma/teratoma showed the presence of the virus in regions of seminoma, teratoma, intratubular germ cell neoplasia, normal tubules, and connective tissue. All patient samples studied immunohistochemically were negative. CONCLUSIONS This confirms the presence of parvovirus B19 in a proportion of germ cell tumours; however, in one patient, the virus was widespread in the tissue components and not confined to tumour cells. In addition, the virus was present in control benign testes. These data suggest that B19 might not be of aetiological importance in germ cell tumours of testis.
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Affiliation(s)
- T C Diss
- Department of Histopathology, Royal Free and University College London Medical School, UK.
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30
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Barnouin K, Fredersdorf S, Eddaoudi A, Mittnacht S, Pan LX, Du MQ, Lu X. Antiproliferative function of p27kip1 is frequently inhibited in highly malignant Burkitt's lymphoma cells. Oncogene 1999; 18:6388-97. [PMID: 10597239 DOI: 10.1038/sj.onc.1203162] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Lack of detectable expression of p27kip1 cyclin dependent kinase inhibitor has previously been correlated with high degree of malignancy in human breast, colorectal, gastric and small cell lung carcinomas. Here we demonstrate that an inverse correlation between p27kip1 expression and tumour malignancy also exists in most types of human B cell lymphomas examined. A clear exception was Burkitt's lymphoma (BL), a highly malignant tumour which often expresses high levels of p27kip1. Analysis of p27kip1 derived from Burkitt's lymphoma cell lines expressing high levels of p27kip1, BL40 and BL41, in a cyclin E/cdk2 kinase inhibition assay demonstrated that p27kip1 is not permanently inactivated since heat treatment can restore the inhibitory activity of p27kip1. However, p27kip1 expressed in these two cell lines is largely sequestered in inactive complexes and we have no evidence that c-myc or Epstein-Barr virus are responsible for the sequestration of p27kip1 in these two cell lines although c-myc and EBV are two oncogenic agents often associated with Burkitt's lymphomas. Interestingly, we observed that high level p27kip1 expression often correlated with cyclin D3 overexpression both in vivo and in BL cell lines. The majority of p27kip1 in BL40 cells was complexed with cyclin D3 indicating that overexpressed cyclin D3 may at least be part of the sequestering activity for the inhibitory function of p27kip1. Furthermore, cyclinD3/cdk4 complex could sequester p27kip1 in a cyclin E/cdk2 kinase assay in vitro. Finally, we show that cyclin D3 transfected into an inducible p27kip1 cell line could overcome the G1 arrest mediated by p27kip1. These results argue that in addition to down-regulation of p27kip1 expression, some tumour cells can sequester and tolerate the antiproliferative function of p27kip1. They also suggest a novel role for the overexpression of D-type cyclins as one pathway allowing tumour cells to overcome the antiproliferative function of p27kip1.
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Affiliation(s)
- K Barnouin
- Ludwig Institute for Cancer Research, Imperial College School of Medicine at St. Mary's, London, UK
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Aiello A, Du MQ, Diss TC, Peng HZ, Pezzella F, Papini D, Giardini R, Pilotti S, Pan LX, Isaacson PG. Simultaneous phenotypically distinct but clonally identical mucosa-associated lymphoid tissue and follicular lymphoma in a patient with Sjögren's syndrome. Blood 1999; 94:2247-51. [PMID: 10498595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023] Open
Abstract
A 44-year-old woman with a 12-year history of Sjögren's syndrome (SS) developed a low-grade mucosa-associated lymphoid tissue (MALT) lymphoma in the parotid gland. Two years later, she presented with generalized lymphadenopathy and hepatosplenomegaly and a follicular lymphoma was diagnosed. To investigate the relationship of the two histologically distinct lymphomas, we re-examined their histology and immunophenotype and studied the lymphomatous tissue from the parotid, cervical lymph node, and spleen using molecular genetic methods. Histologic and immunophenotypic studies confirmed the previous diagnoses and also identified a previously unnoticed focus of follicular lymphoma in the second parotid gland biopsy. Polymerase chain reaction (PCR) amplification of the rearranged Ig heavy-chain gene showed the same sized dominant product in the MALT lymphoma and the follicular lymphoma. Similarly, PCR analysis of the t(14:18) translocation yielded an identical sized band from both MALT and follicular lymphoma. Cloning and sequencing of the Ig PCR products showed an identical CDR3 sequence from each lesion, indicating a common clonal lineage. The follicular lymphoma of the parotid gland lymph node and the follicular lymphoma of the spleen showed an identical mutation signature to that of the salivary gland MALT lymphoma. We propose that follicular lymphoma in the parotid gland lymph node may have resulted from colonization of lymphoid follicles by MALT lymphoma cells, following which the tumor cells were induced to express a follicular lymphoma phenotype, due to Bcl-2 overexpression caused by t(14;18), leading to a change in clinical behavior resulting in rapid widespread dissemination of disease. These observations suggest that the distinct phenotypes of low-grade B-cell lymphomas may be the consequence of interplay between genetic and local microenvironmental factors.
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MESH Headings
- Adult
- Amino Acid Sequence
- Base Sequence
- Biopsy
- Female
- Gene Rearrangement, B-Lymphocyte, Heavy Chain
- Humans
- Immunoglobulin Heavy Chains/chemistry
- Immunoglobulin Heavy Chains/genetics
- Immunophenotyping
- Lymph Nodes/immunology
- Lymph Nodes/pathology
- Lymphoma, B-Cell, Marginal Zone/complications
- Lymphoma, B-Cell, Marginal Zone/genetics
- Lymphoma, B-Cell, Marginal Zone/immunology
- Lymphoma, B-Cell, Marginal Zone/pathology
- Lymphoma, Follicular/complications
- Lymphoma, Follicular/genetics
- Lymphoma, Follicular/immunology
- Lymphoma, Follicular/pathology
- Molecular Sequence Data
- Parotid Neoplasms/complications
- Parotid Neoplasms/genetics
- Parotid Neoplasms/immunology
- Parotid Neoplasms/pathology
- Polymerase Chain Reaction
- Sequence Alignment
- Sjogren's Syndrome/complications
- Sjogren's Syndrome/genetics
- Sjogren's Syndrome/immunology
- Sjogren's Syndrome/pathology
- Spleen/immunology
- Spleen/pathology
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Affiliation(s)
- A Aiello
- Department of Histopathology, University College London Medical School, London, UK
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Peng HZ, Du MQ, Koulis A, Aiello A, Dogan A, Pan LX, Isaacson PG. Nonimmunoglobulin gene hypermutation in germinal center B cells. Blood 1999; 93:2167-72. [PMID: 10090923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023] Open
Abstract
Somatic hypermutation is the most critical mechanism underlying the diversification of Ig genes. Although mutation occurs specifically in B cells during the germinal center reaction, it remains a matter of debate whether the mutation machinery also targets non-Ig genes. We have studied mutations in the 5' noncoding region of the Bcl6 gene in different subtypes of lymphomas. We found frequent hypermutation in follicular lymphoma (25 of 59 = 42%) (germinal center cell origin) and mucosa-associated lymphoid tissue (MALT) lymphoma (19 of 45 = 42%) (postgerminal center), but only occasionally in mantle cell lymphoma (1 of 21 = 4.8%) (pregerminal center). Most mutations were outside the motifs potentially important for transcription, suggesting they were not important in lymphomagenesis but may, like Ig mutation, represent an inherent feature of the lymphoma precursor cells. Therefore, we investigated their normal cell counterparts microdissected from a reactive tonsil. Bcl6 mutation was found in 13 of 24 (54%) clones from the germinal centre but only in 1 of 24 (4%) clones from the naive B cells of the mantle zone. The frequency, distribution, and nature of these mutations were similar to those resulting from the Ig hypermutation process. The results show unequivocal evidence of non-Ig gene hypermutation in germinal center B cells and provide fresh insights into the process of hypermutation and lymphomagenesis.
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MESH Headings
- Adult
- B-Lymphocytes/metabolism
- DNA Mutational Analysis
- DNA, Neoplasm/genetics
- DNA-Binding Proteins/genetics
- Female
- Gene Rearrangement, B-Lymphocyte
- Germinal Center/pathology
- Humans
- Lymphoma, B-Cell, Marginal Zone/genetics
- Lymphoma, B-Cell, Marginal Zone/pathology
- Lymphoma, Follicular/genetics
- Lymphoma, Follicular/pathology
- Lymphoma, Non-Hodgkin/genetics
- Lymphoma, Non-Hodgkin/pathology
- Mutagenesis
- Neoplasm Proteins/genetics
- Palatine Tonsil/pathology
- Polymerase Chain Reaction
- Polymorphism, Single-Stranded Conformational
- Proto-Oncogene Proteins/genetics
- Proto-Oncogene Proteins c-bcl-6
- Transcription Factors/genetics
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Affiliation(s)
- H Z Peng
- Department of Histopathology, University College London Medical School, London, UK
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Willis TG, Jadayel DM, Du MQ, Peng H, Perry AR, Abdul-Rauf M, Price H, Karran L, Majekodunmi O, Wlodarska I, Pan L, Crook T, Hamoudi R, Isaacson PG, Dyer MJ. Bcl10 is involved in t(1;14)(p22;q32) of MALT B cell lymphoma and mutated in multiple tumor types. Cell 1999; 96:35-45. [PMID: 9989495 DOI: 10.1016/s0092-8674(00)80957-5] [Citation(s) in RCA: 483] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
MALT B cell lymphomas with t(1;14)(p22;q32) showed a recurrent breakpoint upstream of the promoter of a novel gene, Bcl10. Bcl10 is a cellular homolog of the equine herpesvirus-2 E10 gene: both contain an amino-terminal caspase recruitment domain (CARD) homologous to that found in several apoptotic molecules. Bcl10 and E10 activated NF-kappaB but caused apoptosis of 293 cells. Bcl10 expressed in a MALT lymphoma exhibited a frameshift mutation resulting in truncation distal to the CARD. Truncated Bcl10 activated NF-kappaB but did not induce apoptosis. Wild-type Bcl10 suppressed transformation, whereas mutant forms had lost this activity and displayed gain-of-function transforming activity. Similar mutations were detected in other tumor types, indicating that Bcl10 may be commonly involved in the pathogenesis of human malignancy.
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MESH Headings
- Adaptor Proteins, Signal Transducing
- Amino Acid Sequence
- Animals
- Apoptosis
- B-Cell CLL-Lymphoma 10 Protein
- Base Sequence
- COS Cells
- Cell Line, Transformed
- Cell Transformation, Neoplastic
- Chromosomes, Human, Pair 1
- Chromosomes, Human, Pair 14
- Cloning, Molecular
- Gene Expression
- HeLa Cells
- Humans
- Lymphoma, B-Cell, Marginal Zone/genetics
- Mice
- Molecular Sequence Data
- Mutation
- NF-kappa B/metabolism
- Neoplasm Proteins/genetics
- Neoplasm Proteins/physiology
- Neoplasms/genetics
- Sequence Homology, Amino Acid
- Translocation, Genetic
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Affiliation(s)
- T G Willis
- Academic Department of Haematology and Cytogenetics, Institute of Cancer Research, Sutton, Surrey, United Kingdom
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Dogan A, Du MQ, Aiello A, Diss TC, Ye HT, Pan LX, Isaacson PG. Follicular lymphomas contain a clonally linked but phenotypically distinct neoplastic B-cell population in the interfollicular zone. Blood 1998; 91:4708-14. [PMID: 9616169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Follicular lymphomas are thought to arise from the follicle center B cells and are characterized by follicular structures that recapitulate many features of normal secondary lymphoid follicles. The neoplastic B cells of follicular lymphoma reside not only in follicles but also in the interfollicular zone in which they form a diffuse infiltrate. We have investigated the frequency, extent, and biological characteristics of this interfollicular component in 30 cases of follicular lymphoma. An interfollicular B-cell infiltrate of variable extent (minimal, moderate, or prominent) was present in all cases. Morphologically interfollicular neoplastic B cells were small centrocyte-like cells with lower grade cytology and lower proliferation fraction compared with the neoplastic follicles. The neoplastic phenotype of these cells (CD20+, light chain restricted) was confirmed in 18 cases. Clonal identity between the follicular and interfollicular components was shown in five cases using microdissection and PCR amplification of immunoglobulin heavy chain genes. Analysis of Ig heavy chain gene sequences showed identical variants of tumor subclones in both follicular and interfollicular compartments, indicating active tumor cell traffic between the two. In six cases in which frozen tissue was available, the immunophenotype of follicular and interfollicular tumor cells were compared using immunohistochemistry. Activation markers such as CD10, CD38, and CD95 and T-cell costimulatory molecules CD80 and CD86, which were expressed by neoplastic follicles, were either downregulated or absent in the interfollicular component in most of the cases. The low-grade cytological features, low proliferation fraction, and downregulation of activation markers in the interfollicular neoplastic B cells suggests that these are resting cells analogous to memory B cells of normal lymphoid tissues. The presence of such a resting tumor cell subpopulation in the majority of follicular lymphomas may partly account for the remarkable resistance to therapy of this disease.
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Affiliation(s)
- A Dogan
- Department of Histopathology, UCL Medical School, London, UK
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35
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Du MQ, Isaacson PG. Recent advances in our understanding of the biology and pathogenesis of gastric mucosa-associated lymphoid tissue (malt) lymphoma. Forum (Genova) 1998; 8:162-73. [PMID: 9666052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The evolution of gastric mucosa-associated lymphoid tissue (MALT) lymphoma is a multi-stage process, comprising the sequential development of chronic H. pylori-associated gastritis, low grade and high grade lymphoma. The genesis of MALT lymphoma embodies the mechanisms of both physiological immune responses and the acquisition of genetic abnormalities. The tumour probably originates from an autoreactive MALT marginal zone B cell, which is generated during H. pylori infection. As a consequence of a genotoxic insult induced by H. pylori infection, the progenitor tumour cell may become genetically unstable and develop genetic abnormalities such as the t(11;18) translocation, trisomy three, c-myc and p53 mutations during a phase of expansion, which lead to partial transformation. With the growth help from H. pylori specific T cells, this abnormal B cell clone may undergo clonal expansion and gradually form a low grade MALT lymphoma. Additional genetic abnormalities including the t(1;14) translocation and other uncharacterised events could completely transform this abnormal B cell clone and result in escape from T cell dependency. Finally, further genetic events such as complete inactivation of the tumour suppressor genes p53 and p16, and possible activation of c-myc oncogene by translocation or other undetermined abnormalities can result in high grade transformation
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Affiliation(s)
- M Q Du
- Department of Histopathology, University College London Medical School, London, UK
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36
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Du MQ, Peng HZ, Dogan A, Diss TC, Liu H, Pan LX, Moseley RP, Briskin MJ, Chan JK, Isaacson PG. Preferential dissemination of B-cell gastric mucosa-associated lymphoid tissue (MALT) lymphoma to the splenic marginal zone. Blood 1997; 90:4071-7. [PMID: 9354677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The tendency for gastric mucosa-associated lymphoid tissue (MALT) lymphoma cells preferentially to localize around reactive B-cell follicles, both in the mucosa and regional lymph nodes, coupled with their immunophenotype, has led to the proposal that the normal cell counterpart of this lymphoma is the marginal zone B cell. In keeping with this proposition, lymphocytes expressing the lymphoma idiotype have been detected in the splenic marginal zone in a single case of gastric MALT lymphoma. To confirm that this truly represented preferential homing of MALT lymphoma to the splenic marginal zone, we have now re-examined this case, together with 17 other cases, using both immunohistochemical and molecular methods in an attempt to establish clonal identity between the gastric lymphoma and cells in the splenic marginal zone. In three cases, the spleen was characterized by marked expansion of marginal zones by cells showing the same pattern of Ig light chain restriction as the gastric lymphoma. None of the remaining 15 cases showed histologic evidence of lymphomatous infiltration. Analysis of the Ig genes by polymerase chain reaction (PCR), cloning, and sequencing confirmed clonal identity between the splenic marginal zone infiltrates and the gastric lymphoma in the histologically involved cases. Amplifiable DNA could be extracted from only 5 of the remaining 15 cases. In 3 of these cases, including the case previously studied using an anti-idiotype, involvement of the splenic marginal zone could be confirmed using microdissection and clone-specific PCR. No involvement could be detected in the remaining 2 cases. In addition, we have shown that mucosal addressin cell adhesion molecule-1 (MAdCAM-1), the primary homing receptor of gut-mucosa for lymphocytes, was strongly expressed by the sinus lining cells of the splenic marginal zone. These results provide strong evidence for preferential involvement of the marginal zone when gastric MALT lymphomas disseminate to the spleen, which is in keeping with the notion that the marginal zone B cells are the normal counterparts of MALT lymphoma cells.
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Affiliation(s)
- M Q Du
- Department of Histopathology, University College London Medical School, London, UK
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37
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Ashton-Key M, Diss TC, Pan L, Du MQ, Isaacson PG. Molecular analysis of T-cell clonality in ulcerative jejunitis and enteropathy-associated T-cell lymphoma. Am J Pathol 1997; 151:493-8. [PMID: 9250161 PMCID: PMC1857986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Ulcerative jejunitis (UJ) and enteropathy-associated T-cell lymphoma (EATL) are closely related conditions both associated with celiac disease. Benign-appearing inflammatory ulcers are seen in both, which has led to the suggestion that UJ is a manifestation of EATL. The aim of this study was to investigate this relationship using the polymerase chain reaction (PCR) to detect T-cell gene rearrangement. PCR amplification of the T-cell receptor gamma-chain gene was performed on DNA extracted from lymphoma, associated inflammatory ulcers, and intervening mucosa in six EATL cases and from ulcers and intervening mucosa of seven cases of UJ. In two of these cases, DNA from a subsequent lymphoma was also studied. The PCR products from the tumor and an ulcer from one EATL case, two ulcers from one case of UJ, and one ulcer and subsequent cutaneous lymphoma from one UJ case were sequenced. Twenty-five ulcers from twelve cases of Crohn's disease, twenty sections of normal bowel, and nine celiac biopsies were included as controls. A monoclonal T-cell population defined by a dominant band equal in size to that amplified from the lymphoma was identified in at least one ulcer from four informative EATL cases and from intervening mucosa in three. Monoclonality was demonstrated in at least one, and up to thirteen, ulcers from all seven cases of UJ, in intervening mucosa in five, and in the two subsequent lymphomas. Sequencing showed the same clone was present in the tumor and the ulcer in the EATL case, in two of three ulcers from the UJ case, and in an ulcer and subsequent cutaneous lymphoma in one UJ case. All Crohn's disease ulcers and all sections of normal bowel were polyclonal. One of nine celiac biopsies showed a dominant band. In conclusion, we have shown that T-cell monoclonality is a feature of the ulcers in both UJ and EATL and that the same clone is present in EATL and its associated inflammatory ulcers and in UJ and subsequently developing lymphoma.
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MESH Headings
- Celiac Disease/complications
- Enteritis/etiology
- Enteritis/genetics
- Enteritis/immunology
- Gene Rearrangement, T-Lymphocyte/genetics
- Humans
- Jejunal Diseases/etiology
- Jejunal Diseases/genetics
- Jejunal Diseases/immunology
- Jejunal Neoplasms/etiology
- Jejunal Neoplasms/genetics
- Jejunal Neoplasms/immunology
- Lymphoma, T-Cell/etiology
- Lymphoma, T-Cell/genetics
- Lymphoma, T-Cell/immunology
- Polymerase Chain Reaction
- Receptors, Antigen, T-Cell, gamma-delta/genetics
- Receptors, Antigen, T-Cell, gamma-delta/immunology
- T-Lymphocytes/immunology
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Affiliation(s)
- M Ashton-Key
- Department of Histopathology, University College London Medical School, United Kingdom
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38
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Ashton-Key M, Diss TC, Du MQ, Kirkham N, Wotherspoon A, Isaacson PG. The value of the polymerase chain reaction in the diagnosis of cutaneous T-cell infiltrates. Am J Surg Pathol 1997; 21:743-7. [PMID: 9236829 DOI: 10.1097/00000478-199707000-00001] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The distinction between reactive and neoplastic cutaneous T-cell infiltrates is difficult and requires good clinicopathologic correlation. Many cases manifest changes that are at the borderline between the two. The polymerase chain reaction (PCR) has been reported to detect monoclonality in 52-90% of cutaneous T-cell lymphomas and may be of use in the diagnosis of histologically borderline lesions. We have investigated the use of PCR in a series of borderline lesions including borderline biopsy samples from patients who subsequently developed cutaneous lymphoma. PCR amplification of T-cell receptor (TCR)-gamma chain gene was performed on formalin-fixed, paraffin-embedded tissue from 27 cases of clinically and histologically typical mycosis fungoides (MF), 22 borderline biopsy samples from 10 patients who subsequently developed MF (pre-MF), 32 clinically suspicious, histologically borderline lesions, and 31 cases of chronic dermatitis. Monoclonality was demonstrated in 16 of 27 (59%) cases of MF, 10 of 22 (50%) pre-MF biopsy samples (six of 10 patients), and six of 32 (19%) borderline biopsy samples. The same size monoclonal band was detected in pre-MF biopsy samples from six of seven patients in which a band was demonstrated in the diagnostic MF biopsy. Sequencing confirmed that the MF biopsy sample and the pre-MF biopsy sample contained the same clone. The 31 dermatitis cases gave rise to polyclonal PCR products. Monoclonality can be demonstrated using PCR in 59% of MF cases, which is comparable with other T-cell lymphomas and in up to 50% of borderline biopsy samples in patients who later develop lymphoma. Detection of T-cell monoclonality by PCR is strong evidence of an established or evolving cutaneous T-cell lymphoma.
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Affiliation(s)
- M Ashton-Key
- Department of Histopathology, University College London Medical School, England
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Abstract
Mantle cell lymphomas (MCL) frequently show a vaguely follicular growth pattern. This phenomenon is thought to result from the colonization of reactive B-cell follicles by tumour cells. In view of the unique property of the germinal centre environment, antigen stimulation may play a role in the expansion of the tumour. To assess this, we have examined ongoing Ig mutations, which are genetic markers of B cells in persistent response to antigen stimulation, in five MCLs including two cases derived from the gastrointestinal tract known as lymphomatous polyposis (LP). We have specifically analysed Ig ongoing mutations in tumour cells from multiple lesions in one case and in tumour cells microdissected from colonized follicles in two cases. The consensus Ig VB sequences in four MCLs were identical, or almost identical (three cases 100%, one case 99% homology), to the published germlines, which in each case were those frequently employed by autoantibodies. The consensus Ig VH sequence in the remaining case displayed 95.5% homology to the closest published germline. This may represent derivation from an unknown VH germline or a rare instance of somatic mutations. Extensive sequencing of the rearranged Ig genes revealed ongoing mutations within the tumour clone in two cases: one was a LP with multiple lesions of the gastrointestinal tract and the other was a nodal MCL in which tumour cells from colonized follicles were analysed. Our results indicate that MCLs are derived from pre-germinal centre B cells, possibly autoreactive B-cell clones. The ongoing mutations identified suggest a possible involvement of antigen stimulation in the clonal expansion of a proportion of MCLs.
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Affiliation(s)
- M Q Du
- Department of Histopathology, University College London Medical School
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40
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Du MQ, Xu CF, Diss TC, Peng HZ, Wotherspoon AC, Isaacson PG, Pan LX. Intestinal dissemination of gastric mucosa-associated lymphoid tissue lymphoma. Blood 1996; 88:4445-51. [PMID: 8977236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Despite increasing identification of concurrent gastric and intestinal lymphomas of mucosa-associated lymphoid tissue (MALT), the clonal relationship between the two tumors and their sequential development are poorly understood. It is also unknown whether the development of these concurrent tumors is closely associated with direct antigen stimulation, which is thought to play an important role in the clonal expansion of low-grade MALT lymphomas. To investigate these, we have studied six cases of concurrent gastric and intestinal MALT lymphomas by polymerase chain reaction (PCR) amplification, cloning, and sequencing of the rearranged Ig gene, a strategy that has been widely used for analysis of clonality and antigen-driven properties of B-cell malignancies. In each case, an identical or nearly identical complementarity determining region (CDR) 3 sequence was observed between the dominant clones of concurrent gastric and intestinal MALT lymphomas. In four of six cases examined, sufficient Ig variable region sequence information was obtained to permit analysis of somatic mutations. The mutation patterns in one case suggest that the intestinal lesion is secondary to the gastric tumor, and the mutation patterns in two cases indicate that the gastric and intestinal lesions are derived from different tumour subclones, which emerge after expansion of a common early tumor clone. Furthermore, three of four cases showed ongoing Ig mutations among different PCR clones at each site. These results show that concurrent gastric and intestinal MALT lymphomas are derived from the same clone and suggest that the intestinal lesions result from dissemination of gastric tumours. Antigen stimulation may play a role in tumor evolution, particularly at an early stage.
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MESH Headings
- Amino Acid Sequence
- Antigen Presentation
- Base Sequence
- Clone Cells/pathology
- DNA, Neoplasm/immunology
- Gastrointestinal Neoplasms/pathology
- Gene Amplification
- Gene Rearrangement, B-Lymphocyte, Heavy Chain/genetics
- Gene Rearrangement, B-Lymphocyte, Heavy Chain/physiology
- Genes, Immunoglobulin/genetics
- Humans
- Intestinal Neoplasms/genetics
- Lymphoma, B-Cell, Marginal Zone/genetics
- Lymphoma, B-Cell, Marginal Zone/pathology
- Molecular Sequence Data
- Stomach Neoplasms/genetics
- Stomach Neoplasms/pathology
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Affiliation(s)
- M Q Du
- Department of Histopathology, University College London Medical School, UK
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41
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Du MQ, Seidel A, Phillips DH. Activating mutations in human c-Ha-ras-1 protooncogene induced by stereoisomeric fjord-region benzo[c]chrysene diol-epoxides. Mol Carcinog 1995; 14:160-9. [PMID: 7576108 DOI: 10.1002/mc.2940140305] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The mutagenicity of fjord-region benzo[c]chrysene diol-epoxide (BcCDE) stereoisomers((+) anti-BcCDE, (-)anti-BcCDE, (+)syn-BcCDE, and (-)syn-BcCDE) was studied in a forward-mutation system. pEC plasmid containing the human c-Ha-ras-1 proto-oncogene was reacted in vitro with each optically active isomer separately and transfected into NIH/3T3 cells. Morphologically transformed foci were cloned, and DNA obtained from these foci was tested for the presence of Ha-ras-1 sequence by Southern blot analysis. A total of 50 transformed foci (11-14 for each diastereomer) were generated. To determine the nature of mutations responsible for activating the proto-oncogene, regions of the gene likely to contain the activating mutations were amplified by polymerase chain reaction and then subjected to hybridization with specific oligonucleotides. Gene mutations in 42 of 50 transformed foci were characterized by these methods, and most were found at codon 61 (27), followed by codons 12 (13) and 13 (two). All mutations observed were either G --> T or A --> A --> T transversions. Thirty-six were G --> T transversion mutations occurring at codons 61, 12, and 13. The remaining six were A --> T transversions at codon 61.BcCDE stereoisomers may specifically attack guanine and adenine and result in the mutations observed. Some differences in codon preference but not in the types of mutations were found among these optically active isomers.
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Affiliation(s)
- M Q Du
- Section of Molecular Carcinogenesis, Haddow Laboratories, Institute of Cancer Research, Sutton, United Kingdom
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42
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Ling JQ, Fan MW, Du MQ, Chen Z, He H, Xiong WX. [Preliminary clinical study of endodontic antiseptic in monotithic type chlorhexidine controlled release delivery system]. Shanghai Kou Qiang Yi Xue 1995; 4:12-3. [PMID: 15160098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
The purpose of clinical study was to assess the bacteriological status of the root canal after disinfection with the monotithic type chlorhexidine enrolled release delivery system (CCROS).In experiments the monotithic type CCRDS was found to be more effective than the reservoir type CCRDS.The root canals of 24 teeth with apical periodontitis were completely instrumented and irrigated with sodium hypochloride.After the instrumentations,12 teeth were treated with the monotitihic type CCRDS,12 teeth were treated with formocresol.Bacterological samples from the root canals were taken after 5 days using an anaerobic technique.The results indicated that monotithic type CCRDS was more effective than formocresol in obtaining bacteria-free root canals(Chi-square test P<0.05).The advantages of an antiseptic with along lasting effect for the elimination of bacteria form the root canal and for the prevention of reinfection were emphasized.
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Affiliation(s)
- J Q Ling
- Faculty and Hospital of Stomatology,Hubei Medical University.Wuhan 430070,China
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Abstract
The mutagenicity of oxygen free radicals was studied in a forward mutation system. pEC plasmid containing the human c-Ha-ras-1 proto-oncogene was reacted with oxygen free radicals generated by Cu2+ and H2O2 and was then transfected into NIH/3T3 cells. Transformed foci were observed with oxygen free radical-modified DNA but not with unmodified DNA. The mutations responsible for the Ha-ras-1 gene activation in 11 transformed foci were characterized. G-->T mutations at the second base of codon 12 were found in two transformed foci, A-->T transversions at the second base of codon 61 in five foci, and G-->T mutations at the third position of codon 61 in four transformed foci. These observed mutations are identical to those commonly found in human skin carcinomas, suggesting that reactive oxygen species may play an important role in the carcinogenesis of these tumors. Interestingly, a significant proportion of mutations was found at the second and third base of codon 61 (CAG). In a previous study, the same oxygen free radical-generating system was found to cause an intrastrand cross-link between adjacent purine nucleotides at AG sites in DNA (Carmichael et al., Carcinogenesis 13:1127-1135, 1992). These data demonstrate that oxygen radicals can induce DNA damage that can result in a specific activation of a human proto-oncogene.
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Affiliation(s)
- M Q Du
- Molecular Carcinogenesis Section, Haddow Laboratories, Institute of Cancer Research, Sutton, Surrey, United Kingdom
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Hutchinson WL, Johnson PJ, Du MQ, Williams R. Serum and tissue alpha-L-fucosidase activity in the pre-clinical and clinical stages of hepatocellular carcinoma. Clin Sci (Lond) 1991; 81:177-82. [PMID: 1716188 DOI: 10.1042/cs0810177] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
1. To assess the value of serum alpha-L-fucosidase (EC 3.2.1.51) as a marker for hepatocellular carcinoma, the activity was measured in patients with hepatocellular carcinoma and in control subjects. 2. Mean serum alpha-L-fucosidase activity was significantly greater in 35 patients with hepatocellular carcinoma (225 +/- 69 nkat/l) than in 35 patients with cirrhosis and 20 normal subjects (134 +/- 30 and 93 +/- 28 nkat/l, respectively). The overlap between hepatocellular carcinoma and cirrhosis, however, was such as to severely limit any value of the enzyme as a diagnostic test. 3. In four cirrhotic patients with hepatocellular carcinoma, an increased enzyme activity was detectable in samples taken up to 66 months before the tumours were diagnosed clinically. 4. The serum activity of alpha-L-fucosidase fell to within the reference range after liver transplantation for hepatocellular carcinoma in three patients and in one of these a subsequent rise was associated with tumour recurrence which was diagnosed at 8 months after the rise in activity. Ineffective cytotoxic chemotherapy was also associated with a progressive rise in serum alpha-L-fucosidase activity. 5. alpha-L-fucosidase activity in tumour tissue was significantly lower than that seen in non-tumour tissue from cirrhotic patients. These reductions may represent increased transport from the tissue and may partly account for the increased serum activity found in some patients with hepatocellular carcinoma.
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Affiliation(s)
- W L Hutchinson
- Institute of Liver Studies, King's College Hospital, London
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45
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Abstract
To determine whether abnormal metabolism of L-fucose in hepatocellular carcinoma is accompanied by alterations in the activities of fucosyltransferases, the latter were determined in plasma and liver tissue of patients with this disease and in cirrhotic and normal subjects. Activities of alpha-2/alpha-3 and alpha-6-L-fucosyltransferases were all significantly greater in plasma from patients with hepatocellular carcinoma than in plasma from cirrhotic patients or normal subjects (p less than 0.025). The activity of each enzyme was dependent, to a similar extent, on Mn2+, Mg2+ and triton X-10, irrespective of the source, and all displayed pH optimums in the range of 7.5 to 8.0. In contrast, activities of alpha-2/alpha-3 fucosyltransferases were significantly lower (p less than 0.025) in homogenates prepared from tumorous liver tissue than in that prepared from nontumorous tissue from hepatocellular carcinoma and cirrhotic patients, whereas for the alpha-6 enzyme the situation was reversed (typically, tumor tissue levels were 5 pmol/hr/mg; in nontumor tissue they were 2 pmol/hr/mg). Activities of galactosyl and mannosyltransferase in tumor tissue were greater in all cases than in nontumor cirrhotic tissue. Plasma fucosyltransferases are specifically elevated in hepatocellular carcinoma but different mechanisms appear to underlie the changes seen for alpha-2/alpha-3 and alpha-6-L-fucosyltransferases.
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Affiliation(s)
- W L Hutchinson
- Institute of Liver Studies, King's College Hospital, Denmark Hill, London, United Kingdom
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Abstract
The reactivity of serum alpha-fetoprotein (AFP) from 20 patients with hepatocellular carcinoma (HCC) with immobilized lentil lectin was examined and found to be significantly greater (39% +/- 18%) than that of the same protein from seven patients with chronic liver disease (CLD, 11.2% +/- 3.3%), seven with fulminant hepatic failure (FHF, 10% +/- 8.4%), and eight normal pregnant women (4.1% +/- 2.7%). The reactivity with Concanavalin A (Con A) was also significantly greater for AFP from HCC patients (44.5% +/- 12.5%) than that from FHF patients (7.7% +/- 4%) and normal pregnant women (5.3% +/- 3.3%), but not from patients with CLD. The reactivity with lentil lectin permitted distinction between those with HCC (31.3% +/- 14.1%) and those with uncomplicated CLD (11.2% +/- 8.4%) even when the absolute levels of serum AFP were in the same range (80-400 ng/ml). Evaluation of the alterations by lectin binding methodology may be useful in overcoming problems associated with distinguishing between malignant and CLD, particularly at moderate serum AFP elevations.
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Affiliation(s)
- M Q Du
- Liver Unit, Kings College Hospital, Denmark Hill, London, United Kingdom
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Abstract
The reactivity of serum alpha-fetoprotein (AFP) from 20 patients with hepatocellular carcinoma (HCC) with immobilized lentil lectin was examined and found to be significantly greater (39% +/- 18%) than that of the same protein from seven patients with chronic liver disease (CLD, 11.2% +/- 3.3%), seven with fulminant hepatic failure (FHF, 10% +/- 8.4%), and eight normal pregnant women (4.1% +/- 2.7%). The reactivity with Concanavalin A (Con A) was also significantly greater for AFP from HCC patients (44.5% +/- 12.5%) than that from FHF patients (7.7% +/- 4%) and normal pregnant women (5.3% +/- 3.3%), but not from patients with CLD. The reactivity with lentil lectin permitted distinction between those with HCC (31.3% +/- 14.1%) and those with uncomplicated CLD (11.2% +/- 8.4%) even when the absolute levels of serum AFP were in the same range (80-400 ng/ml). Evaluation of the alterations by lectin binding methodology may be useful in overcoming problems associated with distinguishing between malignant and CLD, particularly at moderate serum AFP elevations.
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Affiliation(s)
- M Q Du
- Liver Unit, Kings College Hospital, Denmark Hill, London, United Kingdom
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Affiliation(s)
- M Q Du
- Liver Unit, King's College Hospital Medical School, Denmark Hill, London, U.K
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Du MQ, Hutchinson WL, Johnson PJ, Williams R. Differential binding of serum glycoproteins to lectins during hepatic regeneration in hepatocellular carcinoma and fulminant hepatic failure. Clin Sci (Lond) 1990; 78:551-5. [PMID: 1696194 DOI: 10.1042/cs0780551] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
1. The concentrations of four serum glycoproteins, thyroxine-binding globulin, alpha 2-macroglobulin, alpha 1-antitrypsin and transferrin, as well as their reactivities with concanavalin A and lentil-lectin, were measured in patients with hepatocellular carcinoma or fulminant hepatic failure and in normal subjects. 2. Serum concentrations of thyroxine-binding globulin and alpha 1-antitrypsin were significantly greater in patients with hepatocellular carcinoma than in normal subjects, and the percentage lentil-lectin reactivity of these two proteins was markedly increased. 3. With the exception of transferrin, which did not bind to lentil-lectin, an enhancement of lentil-lectin reactivity was observed for the glycoproteins in serum from patients with fulminant hepatic failure. No difference in concanavalin A binding was found between the groups for any of the glycoproteins. 4. Altered fucosylation, as indicated by increased lentil-lectin binding, occurs in several glycoproteins arising in malignant and non-malignant conditions associated with abnormal hepatic regeneration.
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Affiliation(s)
- M Q Du
- Liver Unit, King's College Hospital, London
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