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34 人阅读发布时间:2026-06-02 11:14
牙周炎作为全球高发的慢性炎症性疾病,最终会导致牙骨质破坏与不可逆性 tooth loss,而牙骨质再生是牙周组织修复的核心环节。近期,《International Journal of Oral Science》发表重磅研究,首次揭示了表观遗传 - 代谢 Crosstalk 调控细胞性牙骨质形成的关键机制,为牙周再生治疗提供了全新靶点。值得关注的是,Absin CoIP 试剂盒在该研究的核心机制验证中发挥了关键作用,助力科研团队突破技术瓶颈。
发表期刊: International Journal of Oral Science (IF=12.2)
DOI: 10.1038/s41368-025-00420-5
使用Absin产品: 免疫(共)沉淀(IP/CoIP)试剂盒(abs955)

研究团队以 “牙骨质形成的核心调控机制” 为核心,构建了逻辑严密的探索路径:
整个研究形成 “表观遗传调控因子(KDM6B)→ 代谢通路(糖酵解)→ 蛋白翻译后修饰(乳酸化)→ 功能表型(牙骨质形成)” 的完整调控链,层层递进揭示核心机制。
体内实验显示,KDM6B 抑制剂 GSK-J4 处理后,小鼠牙本质 - 牙骨质复合体变薄、细胞性牙骨质面积显著缩小(图 2c-d),矿化标志物 OSX、OCN 表达降低(图 2e-f);体外实验证实,KDM6B 敲低后成牙骨质细胞矿化能力明显下降。

Fig. 2 KDM6B positively governs cellular cementum formation and cementoblast mineralization. a, b GO enrichment and heatmap results of cementogenesis-related gene expression from RNA sequencing analysis of cementoblasts following KDM6B inhibition. c, d Microphotography, hematoxylin and eosin staining (H&E) staining (n = 4), micro-CT and double labeling (n = 4) results of apical cementum in control and GSK-J4 groups of mice. CC, cellular cementum; AC, acellular cementum; PDL, periodontal ligament. (The area of AC and CC displayed in H&E staining originates from the same specimen within each group.) e, f Immunofluorescence (IF) analysis of KDM6B, OSX, and OCN expression levels in cementoblasts of control and GSK-J4 groups (n = 5). CC cellular cementum. Data are presented as mean ± SD. **P < 0.01. ***P < 0.001. ****P < 0.000 1
ChIP-seq 验证 KDM6B 可通过去甲基化 H3K27me3,直接激活 Pdk1 转录(图 4a-b);KDM6B 敲低后,糖酵解关键标志物 LDHA、PDK1 等表达降低,细胞代谢模式从有氧糖酵解转向氧化磷酸化(图 3a-e)。

Fig. 3 KDM6B positively governs the glycolytic process of cementoblasts. a, b Heatmap of glycolysis and TCA cycle-related genes expression of cementoblasts following KDM6B inhibition. c Seahorse examinations of extracellular acidification rate (ECAR). d Seahorse examinations of oxygen consumption rate (OCR). e IF analysis of LDHA and PDK1 expression levels in cementoblasts of control and GSK-J4 groups (n = 5). Data are presented as mean ± SD. *P < 0.05. **P < 0.01. ***P < 0.001. ****P < 0.000 1

Fig. 4 KDM6B regulates cementoblast mineralization by targeting Pdk1. a Chromatin Immunoprecipitation (ChIP) sequencing detection of H3K27me3 peaks at 1 000 bp upstream of the transcription start sites of glycolysis-related markers under KDM6B inhibition. b By dividing Pdk1 upstream into 4 sites, ChIP-qPCR shows that inhibiting Kdm6b could upregulate H3K27me3 in these 4 sites (n = 3). c, d QRT-PCR and WB results indicate reduced mineralization levels after transient transfection with si-Pdk1 (n = 3). e, f QRT-PCR and WB assays reveal rescue of the mineralization phenotype following Pdk1 overexpression under Kdm6b inhibition. Data are presented as mean ± SD. *P < 0.05. **P < 0.01. ***P < 0.001. ****P < 0.000 1
通过乳酸化蛋白质组学鉴定出 ZEB2 的三个乳酸化位点(K485、K762、K993),其中 K485 位点是矿化调控的关键(图 6a-b);PDK1 可通过促进乳酸生成增强 ZEB2 乳酸化,进而上调 RUNX2、BSP 等矿化基因表达(图 6c-e)。

Fig. 6 PDK1-ZEB2 lactylation enhances cementoblast mineralization. a Docking Results of ZEB2 and L-Lactate. b Co-immunoprecipitation (Co- IP) confirms the occurrence of lactylation modifications. c, d Mineralization levels detected by qRT-PCR (n = 3) and WB after mutating lysine (K) to arginine (R). e IF results reveal that ZEB2 lactylation levels were rescued by lactate sodium addition under Pdk1 inhibition. Nala, lactate sodium. Data are presented as mean ± SD. Scale bars: 30 μm, **P < 0.01. ***P < 0.001. ****P < 0.000 1
体内异位矿化模型显示,补充乳酸钠能显著恢复 KDM6B 敲低组的矿化结节形成和胶原纤维合成(图 7c),并提升组织乳酸化水平(图 7d),为临床转化提供了潜在策略。

Fig. 7 Elevated lactylation recovers KDM6B inhibition-mediated cementogenesis downregulation in vivo. c H&E, Masson and ARS staining results for different groups.
在这项高水平研究中,Absin 的免疫共沉淀(Co-IP)试剂盒(abs955)成为验证 ZEB2 乳酸化修饰的核心工具,为机制突破提供了关键技术支持。
研究团队为证实 ZEB2 存在乳酸化修饰,利用 Absin Co-IP 试剂盒,通过 Flag 标签抗体特异性富集 ZEB2 蛋白复合体,再结合乳酸化抗体检测,明确了 ZEB2 乳酸化修饰的真实性(图 6b)。同时,该试剂盒助力验证了 K485、K762、K993 位点突变对 ZEB2 乳酸化水平的影响,为确定关键调控位点提供了直接实验证据。

Fig. 6 PDK1-ZEB2 lactylation enhances cementoblast mineralization. b Co-immunoprecipitation (Co- IP) confirms the occurrence of lactylation modifications.
Absin Co-IP 试剂盒凭借高特异性的抗体结合效率和低背景干扰特性,能够高效富集目标蛋白及其修饰复合体,避免非特异性结合导致的结果偏差。在本研究中,该产品成功捕获到低丰度的 ZEB2 乳酸化复合体,为后续 Western blot 验证和功能分析奠定了坚实基础,是连接 “代谢产物” 与 “功能蛋白修饰” 的关键实验工具。
该研究首次揭示了蛋白质乳酸化修饰在牙骨质形成中的调控作用,为牙周再生治疗提供了 KDM6B、Pdk1、ZEB2 等多个潜在靶点,而乳酸钠补充的干预策略也为临床应用提供了新思路。同时,研究为骨再生领域提供了表观遗传 - 代谢 Crosstalk 的全新研究范式,具有广泛的学科借鉴价值。
Absin 始终致力于为生命科学研究提供高品质工具,从蛋白质相互作用、信号通路分析到翻译后修饰检测,全方位赋能科研创新。未来,Absin 将持续深耕科研需求,提供更全面的实验解决方案,助力更多基础研究突破与临床转化。
本文内容基于《International Journal of Oral Science》(DOI: 10.1038/s41368-025-00420-5)原文献,由 AI 解读整理;文中涉及的原文献图片、数据等知识产权归原期刊及研究团队所有。若存在侵权情形,敬请及时联系我方删除,我方将积极配合处理。