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去卵巢和雌二醇预防性治疗影响大鼠甲状旁腺中PTH 基因及其关键调控因子的mRNA 表达 |
Ovariectomy and prophylactic estrogen therapy affect the mRNA expression of PTH gene and itskey regulatory factors in rat parathyroid glands |
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DOI:10.3969/j.issn.1006-7108.2019.05.010 |
中文关键词: 去卵巢 雌激素 骨质疏松 甲状旁腺素 大鼠 |
英文关键词:ovariectomy estrogen osteoporosis parathyroid hormone rat |
基金项目:国家自然科学基金(31702187);陕西省自然科学基础研究计划(2018JQ3057);陕南秦巴山区生物资源综合开发协同创新中心项目(QBXT ̄17 ̄1) |
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中文摘要: |
目的 探讨雌激素和甲状旁腺素(parathyroid hormone?PTH)在绝经后骨质疏松症(postmenopausal osteoporosis?PMOP)
发生、发展中的作用及其调控关系?为女性绝经后骨质疏松症的防治提供理论基础? 通过构建去卵巢大鼠骨质疏松模型和雌
二醇预防性治疗?分析大鼠甲状旁腺中PTH 基因及其关键调控因子的mRNA 表达? 方法 对去卵巢组(OVX)、雌二醇预防
性治疗组(OVX/ E2)和假手术组(Sham)中大鼠的股骨与胫骨进行石蜡组织切片、苏木精-伊红染色(hematoxylin ̄eosin staining?
H&E)和组织形态学观察? 利用酶联免疫法和微孔板比色法测定大鼠血清雌激素和血清钙的含量变化? 采用qPCR 技术检测
不同处理组间大鼠甲状旁腺中PTH、ER ̄α、CaSR、FGF ̄23、FGFR1、Klotho 和Egr1 基因的mRNA 表达量变化? 结果 摘除卵巢
后大鼠PTH 的mRNA 表达量显著降低?而预防性注射一定剂量的β ̄雌二醇能够显著提高PTH 的mRNA 表达量? 研究发现摘
除卵巢能显著提高甲状旁腺中ER ̄α 的表达量?而雌二醇预防性治疗可以显著降低该基因的表达?提示甲状旁腺组织中的ER ̄
α 可能介导雌激素对PTH 的表达调控? 不同处理组之间?大鼠甲状旁腺中CaSR、FGF ̄23、FGFR1、Klotho 和Egr1(调控PTH 表
达的潜在通路中的关键基因)的mRNA 表达量的存在显著性差异?表明去卵巢和雌二醇预防性治疗影响了大鼠甲状旁腺中
PTH 关键调控因子的mRNA 表达? 结论 去卵巢和一定剂量的β ̄雌二醇预防性给药会影响大鼠PTH 基因的表达?大鼠甲状
旁腺中的ER ̄α、Ca2+ / CaSR 调控系统以及FGF ̄23 ̄Klotho 受体调控系统均可能参与PTH 基因的表达调控? |
英文摘要: |
Objective To explore the role and regulatory relationship of estrogen and parathyroid hormone ( PTH) in the
occurrence and development of postmenopausal osteoporosis (PMOP)? the ovariectomized rat model of osteoporosis was used to
analyze the effect of ovariectomy and prophylactic administration of estrogen on the regulation of PTH gene expression in PMOP
rats. This will provide a theoretical basis for the prevention and treatment of postmenopausal osteoporosis in women. Methods The
histological morphology of femur and tibia of rats in sham operation (Sham) group? ovariectomized (OVX) group and β ̄estradiol ̄
treated OVX (OVX / E2) group was observed in H& E ̄stained paraffin sections. The changes of serum estrogen and calcium in rats
were determined by enzyme ̄linked immunosorbent assay (ELISA) and microporous plate colorimetry. The mRNA expression of
PTH? ER ̄α? CaSR? FGF ̄23? FGFR1? Klotho and Egr1 genes in rat parathyroid glands were detected by real ̄time quantitative PCR(qPCR). Results The expression of PTH mRNA in ovariectomized rats was significantly decreased? while the expression of PTH
mRNA was significantly increased by prophylactic administration of a certain dose of β ̄estradiol. It was found that the expression of
ER ̄α was significantly up ̄regulated in rat parathyroid glands after ovariectomization? but significantly down ̄regulated after
prophylactic administration of β ̄estradiol. It indicated that ER ̄α in parathyroid tissues may mediate the regulation of PTH expression
by estrogen. The expression of CaSR? FGF ̄23? FGFR1? Klotho and Egr1? the key genes in the potential regulatory pathway of PTH
expression? were significantly up ̄regulated or down ̄regulated in the parathyroid glands of rats in different treatment groups. These
result suggest that ovariectomy and prophylactic estrogen therapy may affect the mRNA expression of key regulatory factors of PTH
expression in the rat parathyroid glands. Conclusion Ovariectomy and prophylactic estrogen therapy can affect the expression of
PTH gene. Estrogen receptor ER ̄α? Ca2+ / CaSR? and FGF ̄23 ̄Klotho receptor regulatory system in rat parathyroid glands may
participate in regulating PTH gene expression. |
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