Purpose To study the expression of HIF-1αand Glut-1 in the molecular subtypes of breast carcinoma and their correlation with basal-like breast carcinoma. Methods 803 cases of invasive breast carcinoma from our database were identified. The clinicopath-ologic findings and the biologic markers including estrogen receptor ( ER) , progesterone receptor ( PR) , and human epidermal growth factor receptor-2 (HER-2) status were reviewed. Immunohistochemical MaxVision stains for cytokeratin 5/6 (CK5/6) and epidermal growth factor receptor ( EGFR) were performed. All breast carcinomas were subclassified into Luminal A, Lumincal B, HER-2 over-expression, normal-like, and basal-like subtypes according to Nielsen criteria. Immunohistochemical stain was also used to detect the expression of HIF-1αand Glut-1. Results Positive expression rates of HIF-1αprotein in basal-like, HER-2 over-expression, normal-like, Luminal A and Luminal B substypes were 77. 89% (74/95), 56. 06% (37/66), 55. 76% (92/165), 31. 97% (141/441), 25. 00% (9/36), respectively. The positive expression rates of Glut-1 protein were 80. 00% (76/95), 57. 58% (38/66), 58. 18%(96/165), 34. 01% (150/441), 25. 00% (9/36), respectively. The positive expression rates of HIF-1α and Glut-1 in the basal-like, HER-2 over-expressing and normal-like subtypes were remarkably higher than that in Luminal A and Luminal B subtypes ( P<0. 004 5) and the expression of HIF-1a and Glut-1 was negatively correlated with the expression of ER (P<0. 01). In the ER-negative breast cancers, the positive expression rates of HIF-1a and Glut-1 in basal-like substype were much higher than that in the other sub-types (P<0. 004 5), and the expression of HIF-1α was positively correlated with expression of Glut-1 in basal-like breast carcinoma (P<0. 01). Conclusion The overexpression of HIF-1αand Glut-1 may be closely related to the ER-negative breast cancer and HIF-1α and Glut-1 might play an important role in the development of basal-like breast carcinoma.%目的：探讨乳腺癌各分子亚型中HIF-1α和Glut-1的表达及其与基底细胞样型乳腺癌的关系。方法回顾性分析803例浸润性导管癌的临床病理资料及 ER、PR、HER-2的表达,采用免疫组化 MaxVision法检测 CK5/6和 EGFR的表达,按照Nielsen标准将乳腺癌分成Luminal A型、Luminal B型、HER-2过表达型、基底细胞样型、普通乳腺样型；同时检测HIF-1α和Glut-1在各型乳腺癌中的表达。结果在乳腺癌基底细胞样型、HER-2过表达型、普通乳腺样型、Luminal A型、Luminal B型中,HIF-1α的阳性率分别为77．89%(74/95)、56．06%(37/66)、55．76%(92/165)、31．97%(141/441)、25．00%(9/36)；Glut-1的阳性率分别为80．00%(76/95)、57．58%(38/66)、58．18%(96/165)、34．01%(150/441)、25．00%(9/36)。 HIF-1α及Glut-1在基底细胞样型、HER-2过表达型和普通乳腺样型中的表达显著高于Luminal A型和Luminal B型( P<0．0045),且与ER表达呈显著负相关(P<0．01)；ER阴性乳腺癌中,HIF-1α及Glut-1在基底细胞样型中的阳性率显著高于其它型(P<0．0045),且二者的表达呈显著正相关(P<0．01)。结论 HIF-1α和Glut-1高表达与ER阴性乳腺癌关系密切,且可能在基底细胞样型乳腺癌的发生、发展中起重要作用。
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