ArticleMolecular and cellular biochemistry2013
Bromocriptine modulates the expression of PTHrP receptor, Indian hedgehog, and Runx2 proteins in the growth plate of lactating rats.
Article in Molecular and cellular biochemistry, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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1 citing paper in PubMed, 6 citations in OpenAlex.
- Cyclic stretch promotes the ossification of ligamentum flavum by modulating the Indian hedgehog signaling pathway.Molecular medicine reports · 2020Article
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5 authors at 2 institutions in 1 country.
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Abstract
In lactating rats, the endochondral bone growth is markedly enhanced, leading to the lengthening of long bone. This lactation-induced bone elongation could be abolished by a dopaminergic D2 receptor agonist bromocriptine, but how bromocriptine altered the expression of major chondroregulatory proteins in the growth plate cartilage was elusive. Here, we performed a quantitative immunohistochemical analysis to determine the expression of various peptides and transcription factors known to control the growth plate chondrocyte proliferation and differentiation [i.e., parathyroid hormone-related protein (PTHrP), PTHrP receptor, Indian hedgehog (Ihh), and runt-related transcription factor 2 (Runx2)], in bromocriptine-treated lactating rats. The results showed that bromocriptine markedly increased Ihh expression in hypertrophic chondrocytes during early and mid-lactation, while the expression of PTHrP receptor, but not its ligand PTHrP, was upregulated in the proliferative and hypertrophic zones during mid and late lactation. In contrast, the expression of Runx2, an important transcription factor for chondrocyte differentiation, was suppressed in the hypertrophic chondrocytes of bromocriptine-treated rats. In conclusion, bromocriptine increased Ihh and PTHrP receptor expressions and decreased Runx2 expression, which might, in turn, enhance chondrocyte proliferation and delay chondrocyte hypertrophy, thereby slowing down endochondral bone growth. This finding could explain how bromocriptine compromised the lactation-induced bone elongation.
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