Loss of heterozygosity at chromosome 6q in preinvasive and early invasive breast carcinomas.

Loss of heterozygosity at chromosome 6q in preinvasive and early invasive breast carcinomas.
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染色体6Q杂合性的丧失在侵入性和早期浸润性乳腺癌中的丧失。

DOI:
10.1038/bjc.1997.224
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发表时间:
1997
影响因子:
8.8
通讯作者:
Shaw, JA
Shaw, JA
中科院分区:
医学1区
文献类型:
--
作者:
Chappell, SA;Walsh, T;Walker, RA;Shaw, JA

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我们使用聚合酶链反应 (PCR) 分析来研究 75 个“早期”乳腺癌的显微解剖肿瘤灶中 6q25.1-27 号染色体上的四个多态性微卫星标记、三个二核苷酸重复和一个三核苷酸重复的等位基因不平衡的发生率。这些肿瘤包括 16 例浸润前导管原位癌 (DCIS) 和 59 例经乳房 X 光检查检测到的早期浸润性癌。在所有四个位点以及所有类型和级别的疾病中均检测到杂合性丢失(LOH)。 LOH 的频率范围为 23% 至 50%,具体取决于所研究的标记物。对于 DCIS 病例,LOH 的最高频率出现在 D6S186 位点;对于浸润性癌,LOH 出现在雌激素受体位点。这些数据表明,6q 染色体上该区域内肿瘤抑制基因的失活对于这些早期病变的发展非常重要。
We have used polymerase chain reaction (PCR) analysis to study the incidence of allelic imbalance at four polymorphic microsatellite markers on chromosome 6q25.1-27, three dinucleotide repeats and one trinucleotide repeat, for microdissected tumour foci from a group of 75 'early' breast carcinomas. The tumours comprised 16 preinvasive cases of ductal carcinoma in situ (DCIS) and 59 mammographically detected early invasive carcinomas. Loss of heterozygosity (LOH) was detected at all four loci and in all types and grade of disease. The frequency of LOH ranged from 23% to 50% depending on the marker studied. The highest frequency of LOH was observed at the D6S186 locus for the cases of DCIS and at the oestrogen receptor locus for the invasive carcinomas. These data suggest that the inactivation of tumour-suppressor genes within this region on chromosome 6q is important for the development of these early lesions.
近端6Q,一个显示原发性乳腺癌等位基因损失的区域。
DOI: 10.1038/bjc.1995.58
发表时间: 1995-02
影响因子: 8.8
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