Knockdown of hspg2 is associated with abnormal mandibular joint formation and neural crest cell dysfunction in zebrafish.
| Autor: | Castellanos BS; Department of Biological Sciences, University of Texas El Paso, El Paso, TX, 79968, USA., Reyes-Nava NG; Department of Biological Sciences, University of Texas El Paso, El Paso, TX, 79968, USA., Quintana AM; Department of Biological Sciences, University of Texas El Paso, El Paso, TX, 79968, USA. aquintana8@utep.edu. |
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| Jazyk: | angličtina |
| Zdroj: | BMC developmental biology [BMC Dev Biol] 2021 Mar 08; Vol. 21 (1), pp. 7. Date of Electronic Publication: 2021 Mar 08. |
| DOI: | 10.1186/s12861-021-00238-4 |
| Abstrakt: | Background: Heparan sulfate proteoglycan 2 (HSPG2) encodes for perlecan, a large proteoglycan that plays an important role in cartilage formation, cell adhesion, and basement membrane stability. Mutations in HSPG2 have been associated with Schwartz-Jampel Syndrome (SJS) and Dyssegmental Dysplasia Silverman-Handmaker Type (DDSH), two disorders characterized by skeletal abnormalities. These data indicate a function for HSPG2 in cartilage development/maintenance. However, the mechanisms in which HSPG2 regulates cartilage development are not completely understood. Here, we explored the relationship between this gene and craniofacial development through morpholino-mediated knockdown of hspg2 using zebrafish. Results: Knockdown of hspg2 resulted in abnormal development of the mandibular jaw joint at 5 days post fertilization (DPF). We surmised that defects in mandible development were a consequence of neural crest cell (NCC) dysfunction, as these multipotent progenitors produce the cartilage of the head. Early NCC development was normal in morphant animals as measured by distal-less homeobox 2a (dlx2a) and SRY-box transcription factor 10 (sox10) expression at 1 DPF. However, subsequent analysis at later stages of development (4 DPF) revealed a decrease in the number of Sox10 + and Collagen, type II, alpha 1a (Col2a1a) + cells within the mandibular jaw joint region of morphants relative to random control injected embryos. Concurrently, morphants showed a decreased expression of nkx3.2, a marker of jaw joint formation, at 4 DPF. Conclusions: Collectively, these data suggest a complex role for hspg2 in jaw joint formation and late stage NCC differentiation. |
| Databáze: | MEDLINE |
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