An in situ hybridization study of decorin and biglycan mRNA in mouse osteoblasts in vivo

An in situ hybridization study of decorin and biglycan mRNA in mouse osteoblasts in vivo
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小鼠成骨细胞体内核心蛋白聚糖和双糖链蛋白聚糖 mRNA 的原位杂交研究

DOI:
10.1007/s12565-020-00588-2
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发表时间:
2021
影响因子:
1.2
通讯作者:
Shibata S
Shibata S
中科院分区:
医学4区
文献类型:
--
作者:
Randilini A;Fujikawa K; Shibata S

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原位杂交的核心蛋白聚糖和双糖蛋白聚糖的mRNA,主要成员的小亮氨酸丰富的蛋白聚糖,进行使用[35 S]-标记的RNA探针,在上下文中的假设,它们显示不同的表达模式与小鼠成骨细胞分化。我们采用了两个能够清晰地跟踪骨形成发育过程的骨化部位:骨化的鼓膜环和发育中的髁突软骨骨领,在E14.0时,DecorinmRNA在发育中的鼓膜环成骨细胞中表达,在E15.0时,发育中的骨领成骨细胞中表达,而biglycan mRNA则不表达,表明decorinmRNA在新分化的成骨细胞中的表达早于biglycan。随着成骨细胞的成熟,双糖蛋白聚糖mRNA开始表达并保持其在骨的外部区域(骨膜)和内部区域(骨内膜)中的表达。相比之下,decorinmRNA的表达保持在外部区域,但减少在内部区域。这些结果表明,核心蛋白聚糖和双糖在成骨细胞分化过程中表现出不同的表达模式,在骨形成过程中发挥特定的作用。
In situ hybridization ofdecorinandbiglycanmRNA, principal members of small leucine-rich proteoglycan, was performed using [35S]-labeled RNA probes, in the context of the hypothesis that they show different expression patterns associated with osteoblast differentiation in mice. We adopted two ossifying sites that can clearly follow the developmental process of bone formation: ossifying tympanic ring and developing bone collar of mandibular condylar cartilage.DecorinmRNA was expressed in osteoblasts of developing tympanic ring at E14.0, as well as of developing bone collar at E15.0, butbiglycanmRNA was not, indicating decorinmRNA was expressed earlier in newly differentiating osteoblasts thanbiglycan. With maturation of osteoblasts,biglycanmRNA became expressed and maintained its expression both in the outer region (periosteum) and in the interior region (endosteum) of bone. By contrast,decorinmRNA expression was maintained in the outer region but diminished in the interior region. These results indicate thatdecorinandbiglycanshow differential expression patterns in differentiating osteoblasts and play specific roles in bone formation.
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