Role of CD34 in calcification of human aortic valve interstitial cells from patients with aortic valve stenosis

IF 3 3区 医学 Q2 PHARMACOLOGY & PHARMACY
Shihu Men , Zaiqiang Yu , Xu Liu , Kazuyuki Daitoku , Mayuki Tachizaki , Shogo Kawaguchi , Tadaatsu Imaizumi , Masahito Minakawa , Kazuhiko Seya
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引用次数: 0

Abstract

Various osteogenic factors are involved in ectopic human aortic valve calcification; however, the key cell species involved in calcification remains unclear. In a previous study, we reported that mesenchymal stem (CD73, 90, 105) and endothelial (VEGFR2) cell markers are positive in almost all human aortic valve interstitial cells (HAVICs) obtained from a patient with calcified aortic valve stenosis (CAVS). Further, CD34-negative HAVICs are highly sensitive to calcification stimulations. Here, we aimed to pathophysiologically clarify the role of CD34 in HAVICs obtained from individual patients with severe CAVS. A DNA microarray between CD34-positive and CD34-negative HAVICs, separated by fluorescence-activated cell sorting, indicated that tenascin X (TNX) mRNA expression significantly decreased in CD34-negative cells. Furthermore, the inflammatory cytokines, tumor necrosis factor (TNF)-α and interleukin (IL)-1β significantly downregulated CD34 expression in HAVICs. TGF-β, a key cytokine of endothelial-mesenchymal transition, did not affect HAVIC calcification. CD34 overexpression strongly inhibited TNF-α- and IL-1β-induced calcification and maintained TNX mRNA expression. These results suggest one possibility that CD34 is an inhibitory regulator of valve calcification. Furthermore, TNF-α- and IL-1β-induced CD34 downregulation in HAVICs contributes to HAVIC calcification by downregulating TNX protein expression.

CD34 在主动脉瓣狭窄患者主动脉瓣间质细胞钙化中的作用
各种成骨因子参与了异位人类主动脉瓣钙化;然而,参与钙化的关键细胞种类仍不清楚。在之前的一项研究中,我们报道了间充质干细胞(CD73、90、105)和内皮细胞(VEGFR2)标记在从一名主动脉瓣狭窄(CAVS)患者体内获得的几乎所有人类主动脉瓣间质细胞(HAVICs)中均呈阳性。此外,CD34 阴性的 HAVIC 对钙化刺激高度敏感。在此,我们旨在从病理生理学角度阐明 CD34 在重度 CAVS 患者 HAVICs 中的作用。通过荧光激活细胞分拣技术分离出的 CD34 阳性和 CD34 阴性 HAVICs 的 DNA 微阵列显示,CD34 阴性细胞中的腱鞘蛋白 X (TNX) mRNA 表达量明显下降。此外,炎性细胞因子、肿瘤坏死因子(TNF)-α 和白细胞介素(IL)-1β 能显著下调 CD34 在 HAVICs 中的表达。内皮-间质转化的关键细胞因子 TGF-β 并不影响 HAVIC 的钙化。CD34 的过表达强烈抑制了 TNF-α 和 IL-1β 诱导的钙化,并维持了 TNX mRNA 的表达。这些结果表明,CD34可能是瓣膜钙化的抑制性调节因子。此外,TNF-α和IL-1β诱导的CD34在HAVIC中的下调通过下调TNX蛋白的表达而促进了HAVIC的钙化。
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来源期刊
CiteScore
6.20
自引率
2.90%
发文量
104
审稿时长
31 days
期刊介绍: Journal of Pharmacological Sciences (JPS) is an international open access journal intended for the advancement of pharmacological sciences in the world. The Journal welcomes submissions in all fields of experimental and clinical pharmacology, including neuroscience, and biochemical, cellular, and molecular pharmacology for publication as Reviews, Full Papers or Short Communications. Short Communications are short research article intended to provide novel and exciting pharmacological findings. Manuscripts concerning descriptive case reports, pharmacokinetic and pharmacodynamic studies without pharmacological mechanism and dose-response determinations are not acceptable and will be rejected without peer review. The ethnopharmacological studies are also out of the scope of this journal. Furthermore, JPS does not publish work on the actions of biological extracts unknown chemical composition.
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