西藏地区非特殊型浸润性乳腺癌雄激素受体的表达及其与不同分子分型及临床病理特征的相关性

目的 探讨西藏地区藏族女性非特殊型浸润性乳腺癌雄激素受体(AR)的表达及其与不同分子分型及临床病理特征的相关性。方法 选取西藏自治区人民医院自2015年12月至2021年3月手术切除的54例藏族女性非特殊型浸润性乳腺癌患者为研究对象,收集全部入组患者的病理及临床资料,通过免疫组织化学方法检测AR、细胞增殖标志抗原(Ki-67)、雌激素受体(ER)、人表皮生长因子受体2(HER-2)以及孕激素受体(PR)的表达情况,对于 HER-2 结果不明确病例,加以荧光原位杂交方法检测,探讨藏族女性非特殊型浸润性乳腺癌AR的表达与分子分型和临床病理特征的关系。结果 AR在藏族女性非特殊型浸润性乳腺癌中的表达与ER(χ²=8.200,P=0.004)、PR(χ²=9.900,P=0.003)、分子分型(χ²=11.690,P=0.009)相关,与肿瘤部位、年龄、大小、组织学分级、淋巴结有无转移、脉管有无瘤栓、临床分期、HER-2及Ki-67的表达不相关(P均>0.05);不同分子分型与组织学分级(χ²=24.970,P=0.001)、临床分期(χ²=9.035,P=0.029)、淋巴结转移(χ²=9.691,P=0.021)均相关。结论 AR在西藏地区藏族女性非特殊型浸润性乳腺癌组织中的三阴性乳腺癌中表达率明显降低,在ER、PR阳性的病例中有较高的阳性率。不同的分子分型与组织学分级、临床分期和淋巴结转移均相关。

Correlations of Androgen Receptor Expression with Molecular Subtypes and Clinopathological Features of Invasive Breast Carcinoma of No Special Type in Tibet

Objective To investigate the expression of androgen receptor(AR)and its correlations with different molecular subtypes and clinicopathological features of breast invasive carcinoma of no special type(IBC-NST)in females of Tibetan ethnic minority in Tibet. Methods This study enrolled 54 female patients of Tibetan ethnic minority with IBC-NST surgically removed in the Tibet Autonomous Region People’s Hospital from December 2015 to March 2021 for retrospective analysis.The clinical and pathological data of all the enrolled patients were collected.The immunohistochemical method was employed to determine the expression of AR,cell proliferation marker antigen (Ki-67),estrogen receptor(ER),human epidermal growth factor receptor 2(HER-2),and progesterone receptor(PR).For those with unclear HER-2 results,fluorescence in situ hybridization was employed for the determination.The relationship of AR expression with molecular subtypes and clinicopathological features was then analyzed. Results The expression of AR in Tibetan female patients with IBC-NST was correlated with ER(χ²=8.200,P=0.004),PR(χ²=9.900,P=0.003),and molecular subtype(χ²=11.690,P=0.009)and not correlated with tumor location,age,size,histological grade,lymph node metastasis,vascular invasion,clinical stage,or expression of HER-2 and Ki-67(all P>0.05).Molecular subtype was correlated with histological grade(χ²=24.970, P=0.001),clinical stage(χ²=9.035, P=0.029),and lymph node metastasis(χ²=9.691,P=0.021). Conclusions The positive expression rate of AR in the triple-negative IBC-NST patients of Tibetan ethnic minority was significantly lower than that in ER-or PR-positive patients in Tibet.Molecular subtype was correlated with histological grade,clinical stage,and lymph node metastasis.