关键词：烷烃；乳腺癌；文化；基因；腺体
摘 要：Mammary gland samples were isolated from wild type, vitamin D receptor knockout (VDRKO) and 1alphahydroxylase knockout (1 KO) female mice for whole mounts and paraffin embedding (inguinal) and for RNA and protein isolation (thoracic). Time points collected included 6-10wk old nulliparous, 9 and 16 days pregnancy, 5 and 10 days lactation and 3 and 6 days involution. All whole mounts were completed and showed increased branching during pregnancy in the VDRKO glands relative to wild type and 1 KO glands. Paraffin embedded involution samples were stained with hematoxylin and eosin and showed an apparent decrease in alveolar breakdown in the first few days of involution in VDRKO and 1 KO glands compared to wild type controls. Organ culture studies show that treatment of wild type and 1 KO glands with 1,25 dihydroxyvitamin D retards tertiary branching. This appears not to be the case in VDRKO glands. Gene expression analysis via microarray and qPCR provides only a glimpse into the complexities of the signaling involved in this process and is being complimented by ongoing protein analysis. These results suggest that 1 KO mammary glands do not develop exclusively similar to VDRKO or wild type glands which verifies our need to complete the remainder of our studies to determine if the VDR is acting to control mammary gland development through the vitamin D pathway or through some other ligand or possibly without a ligand.