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Meckel's cartilage (MC) was first delineated in 1820 by the German anatomist Johann Friedrich Meckel the Younger through his examination of human embryos. During early development, MC functions as a supportive structure for the mandible and serves as a template for the subsequent formation of the jaw bones. Ultimately, MC transforms into either skeletal tissue, ligaments, or completely resorbs, integrating with the continuously developing osseous structures. This review elucidates the influence of MC development and degeneration on mandibular morphogenesis, delineating cellular processes and key factors that govern chondrogenic fate determination. The analysis reveals how the alterations of MC affect mandibular and craniofacial development. As a transient cartilaginous structure, investigation into MC may yield valuable insights for understanding oral and craniomaxillofacial pathologies.
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http://dx.doi.org/10.3760/cma.j.cn112144-20250521-00188 | DOI Listing |
Zhonghua Kou Qiang Yi Xue Za Zhi
September 2025
Foshan Stomatological Hospital & School of Medicine, Foshan University, Foshan 528000, China.
Meckel's cartilage (MC) was first delineated in 1820 by the German anatomist Johann Friedrich Meckel the Younger through his examination of human embryos. During early development, MC functions as a supportive structure for the mandible and serves as a template for the subsequent formation of the jaw bones. Ultimately, MC transforms into either skeletal tissue, ligaments, or completely resorbs, integrating with the continuously developing osseous structures.
View Article and Find Full Text PDFG3 (Bethesda)
August 2025
Department of Biochemistry, University of Otago, Dunedin 9016, New Zealand.
RECQL4 encodes a RecQ helicase, one of a family of DNA unwinding enzymes with roles in DNA replication, double strand break repair and genomic stability. Pathogenic variants in RECQL4 are clinically associated with three rare autosomal recessive conditions: Rothmund-Thomson Syndrome type II, Baller-Gerold Syndrome and RAPADILINO syndrome. These three syndromes show overlapping growth retardation, low bone density and skeletal defects affecting the arms and hands.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
August 2025
Department of Pharmacy, University of Rajshahi, Rajshahi, 6205, Bangladesh.
Chlorpyrifos (organophosphorus) and carbofuran (carbamate) are widely used pesticides in Bangladesh, raising concerns about their environmental and ecotoxicological impacts, particularly on aquatic life. In this study, pesticide concentrations in water, soil sediment, and fish samples collected from Kumari Beel, Rajshahi, Bangladesh, were measured using HPLC analysis. Concentrations were highest in fish, ranging from 0.
View Article and Find Full Text PDFbioRxiv
July 2025
Department of Biology, University of New Mexico, Albuquerque, NM, USA.
Mandibular bone development utilizes both endochondral ossification, forming from the cartilaginous anlage Meckel's cartilage derived from neural crest cells (NCC) and intramembranous ossification with direct differentiation of NCCs toward osteoblasts. Wnt/β-catenin signaling drives osteogenic vs chondrogenic differentiation and must be tightly controlled during the differentiation of osteochondroprogenitors. Chromatin remodelers add hierarchal regulation to the activation and repression of crucially timed gene regulatory networks and signaling cascades.
View Article and Find Full Text PDFInt J Mol Sci
May 2025
Ningxia Key Laboratory of Oral Disease Research, Ningxia Key Laboratory of Craniomaxillofacial Deformities Research, School of Stomatology, Ningxia Medical University, Yinchuan 750004, China.
The gene encodes Rho-GTPase-activating protein 29 (), which plays a crucial role in embryonic tissue development. Mutations in the gene are significantly associated with non-syndromic cleft lip and palate (NSCL/P). Our study demonstrated that the deletion of leads to syndromic cleft lip and palate (SCL/P) characteristics in mice, where, in addition to cleft palate, the mice exhibit craniofacial and systemic skeletal abnormalities.
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