中国南方地区原发性眼附属器黏膜相关淋巴组织结外边缘区B细胞淋巴瘤分子遗传学异常  被引量:2

Study on genetic aberrations of ocular mucosa.associated lymphoid tissue lymphomas occurring in southern China

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作  者:张雪梅[1] 张文燕[2] 周元平[3] 莫祥兰[4] 李永平[5] 王桂秋[6] 周英琼[7] 曾思恩[7] 李甘地[2] 叶洪涛[7,8] 

机构地区:[1]广西医科大学第四附属医院病理科/广西医科大学病理学教研室,柳州545005 [2]四川大学华西医院病理科,成都610041 [3]南方医科大学南方医院感染内科 [4]广西壮族自治区人民医院病理科 [5]中山大学眼科医院病理科 [6]广西卫生管理干部学院 [7]桂林医学院病理学教研室 [8]Department of Pathology, University College London, United Kingdom

出  处:《中华病理学杂志》2010年第8期513-517,共5页Chinese Journal of Pathology

基  金:国家自然科学基金(30760081,30671872,30960122);国家自然科学基金海外青年学者合作研究基金(30428018);广西壮族自治区自然科学基金(桂科自0499015和桂科自0848012)

摘  要:目的 探讨中国南方地区原发性眼附属器黏膜相关淋巴组织结外边缘区B细胞淋巴瘤(简称MALT淋巴瘤)分子遗传学异常的发生情况.方法应用间期荧光原位杂交(FISH)方法,检测57例来自中国南方部分地区眼附属器MALT淋巴瘤病例组织中t(11;18)(q21;q21)/API2-MALT1、t(1;14)(p22;q32)/IgH-bcl-10、t(14;18)(q32;q21)/IgH-MALT1以及涉及bcl-6和FOXP1基因的染色体易位等分子遗传学异常.结果 57例眼附属器MALT淋巴瘤标本中,有9例携带染色体易位,总的发生率为15.8%.其中4例(7.0%)为t(11;18)(q21;q21)/API2-MALT1,1例(1.8%)为t(14;18)(q32;q21)/IgH-MALT1,1例(1.8%)为涉及bcl-6基因的染色体易位,3例(5.3%)为涉及IgH但未知与其易位伙伴基因的染色体易位.另外,伴有3个bcl-6基因或3个MALT1基因拷贝的分别有17例(29.8%)和21例(36.8%),同时伴有3个bcl-6基因和3个MALT1基因拷贝的有12例(21.1%).结论中国南方地区眼附属器MALT淋巴瘤中,存在MALT淋巴瘤特异性相关染色体易位t(11;18)(q21;q21)/API2-MALT1和t(14;18)(q32;q21)/IgH-MALT1,与中国北方地区和北美的报道有明显差异,进一步证实眼附属器MALT淋巴瘤的染色体易位存在地域性差异.MALT1基因3拷贝和bcl-6基因3拷贝现象是中国南方地区眼附属器MALT淋巴瘤中最常见的分子遗传学异常,提示其可能与MALT淋巴瘤的发病机制有关.Objective To study the genetic aberrations of ocular extranodal marginal zone B-cell lymphomas of mucosa-associated lymphoid tissue (MALT) type occurring in patients from southern China.Methods Fifty seven paraffin-embedded ocular MALT lymphoma specimens from patients in southern China were studied by interphase fluorescence-in-situ hybridization (FISH) for genetic aberrations including t(11;18) (q21;q21)/API2-MALT1, t(1;14) (p22;q32)/IgH-bcl-10, t(14;18) (q32;q21)/IgH-MALT1 and bcl-6/FOXP1 gene translocations. Results Amongst the 57 cases studied, 9 cases ( 15.8% ) showed chromosome translocations, including 4 cases ( 7.0% ) of t ( 11; 18 ) ( q21; q21 )/API2-MALT1, 1 case ( 1.8% ) of t ( 14; 18 ) ( q32; q21 )/IgH-MALT1, 1 case ( 1.8% ) of bcl-6 gene-related chromosome translocation and 3 cases (5.3% ) of IgH-unknown translocation partner. FISH revealed 17 cases (29.8%)with 3 copies of bcl-6 gene, 21 cases (36. 8% ) with 3 copies of MALT1 gene and 12 cases (21.1%) with 3 copies of both genes. Conclusions The MALT lymphoma-associated chromosome translocations t (11 ;18)(q21;q21 )/API2-MALT1 and t (14; 18) (q32; q21 )/IgH-MALT1 are demonstrated in ocular MALT lymphomas of southern Chinese patients. The prevalence is significantly different from that reported in northern Chinese and northern American patients, indicating a geographic heterogeneity in the MALT lymphoma-associated genetic aberrations. The presence of 3 copies of bcl-6 and MALT1 genes is the commonest genetic abnormalities observed in ocular MALT lymphomas, suggesting a possible role in MALT lymphomagenesis.

关 键 词:淋巴瘤 黏膜相关淋巴样组织 眼肿瘤 原位杂交 荧光 

分 类 号:R739.7[医药卫生—肿瘤]

 

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