scholarly journals Modulated Expression of Type X Collagen in the Meckel's Cartilage with Different Developmental Fates

1995 ◽  
Vol 170 (2) ◽  
pp. 387-396 ◽  
Author(s):  
Kun Sung Chung ◽  
Howard H. Park ◽  
Kang Ting ◽  
Hiroko Takita ◽  
Suneel S. Apte ◽  
...  
Keyword(s):  
Type X Collagen ◽  
Meckel's Cartilage ◽  
Meckel’S Cartilage

scholarly journals Functional analysis of CTRP3/cartducin in Meckel’s cartilage and developing condylar cartilage in the fetal mouse mandible

2011 ◽  
Vol 218 (5) ◽  
pp. 517-533 ◽  
Author(s):  
Tamaki Yokohama-Tamaki ◽  
Takashi Maeda ◽  
Tetsuya S. Tanaka ◽  
Shunichi Shibata
Keyword(s):  
Functional Analysis ◽  
Condylar Cartilage ◽  
Meckel's Cartilage ◽  
Fetal Mouse ◽  
Meckel’S Cartilage

Effect of Biomechanical Environment on Degeneration of Meckel’s Cartilage

2020 ◽  
pp. 002203452096011
Author(s):  
M. Farahat ◽  
G.A.S. Kazi ◽  
E.S. Hara ◽  
T. Matsumoto
Keyword(s):  
Endochondral Ossification ◽  
Biomechanical Properties ◽  
Cartilage Degradation ◽  
Middle Region ◽  
Meckel's Cartilage ◽  
3 Dimensional ◽  
Meckel’S Cartilage ◽  
Surrounding Environment ◽  
Rigid Environment

During orofacial tissue development, the anterior and posterior regions of the Meckel’s cartilage undergo mineralization, while the middle region undergoes degeneration. Despite the interesting and particular phenomena, the mechanisms that regulate the different fates of Meckel’s cartilage, including the effects of biomechanical cues, are still unclear. Therefore, the purpose of this study was to systematically investigate the course of Meckel’s cartilage during embryonic development from a biomechanical perspective. Histomorphological and biomechanical (stiffness) changes in the Meckel’s cartilage were analyzed from embryonic day 12 to postnatal day 0. The results revealed remarkable changes in the morphology and size of chondrocytes, as well as the occurrence of chondrocyte burst in the vicinity of the mineralization site, an often-seen phenomenon preceding endochondral ossification. To understand the effect of biomechanical cues on Meckel’s cartilage fate, a mechanically tuned 3-dimensional hydrogel culture system was used. At the anterior region, a moderately soft environment (10-kPa hydrogel) promoted chondrocyte burst and ossification. On the contrary, at the middle region, a more rigid environment (40-kPa hydrogel) enhanced cartilage degradation by inducing a higher expression of MMP-1 and MMP-13. These results indicate that differences in the biomechanical properties of the surrounding environment are essential factors that distinctly guide the mineralization and degradation of Meckel’s cartilage and would be valuable tools for modulating in vitro cartilage and bone tissue engineering.

scholarly journals Vessel-derived angiocrine IGF1 promotes Meckel's cartilage proliferation to drive jaw growth during embryogenesis

Development ◽  
2020 ◽  
Vol 147 (11) ◽  
pp. dev190488 ◽  
Author(s):  
Ceilidh Marchant ◽  
Peter Anderson ◽  
Quenten Schwarz ◽  
Sophie Wiszniak
Keyword(s):  
Meckel's Cartilage ◽  
Meckel’S Cartilage

Autophagy Prior to Chondrocyte Cell Death During the Degeneration of Meckel's Cartilage

2012 ◽  
Vol 295 (5) ◽  
pp. 734-741 ◽  
Author(s):  
Rong-Tao Yang ◽  
Chi Zhang ◽  
Yong Liu ◽  
Hai-Hua Zhou ◽  
Zu-Bing Li
Keyword(s):  
Cell Death ◽  
Meckel's Cartilage ◽  
Meckel’S Cartilage

scholarly journals Mammalian development does not recapitulate suspected key transformations in the evolutionary detachment of the mammalian middle ear

2016 ◽  
Vol 283 (1822) ◽  
pp. 20152606 ◽  
Author(s):  
Héctor E. Ramírez-Chaves ◽  
Stephen W. Wroe ◽  
Lynne Selwood ◽  
Lyn A. Hinds ◽  
Chris Leigh ◽  
...  
Keyword(s):  
Middle Ear ◽  
Functional Divergence ◽  
Mammalian Development ◽  
Meckel's Cartilage ◽  
Topological Change ◽  
Meckel’S Cartilage ◽  
Fossil Evidence ◽  
Jaw Joint ◽  
Land Vertebrates

The ectotympanic, malleus and incus of the developing mammalian middle ear (ME) are initially attached to the dentary via Meckel's cartilage, betraying their origins from the primary jaw joint of land vertebrates. This recapitulation has prompted mostly unquantified suggestions that several suspected—but similarly unquantified—key evolutionary transformations leading to the mammalian ME are recapitulated in development, through negative allometry and posterior/medial displacement of ME bones relative to the jaw joint. Here we show, using µCT reconstructions, that neither allometric nor topological change is quantifiable in the pre-detachment ME development of six marsupials and two monotremes. Also, differential ME positioning in the two monotreme species is not recapitulated. This challenges the developmental prerequisites of widely cited evolutionary scenarios of definitive mammalian middle ear (DMME) evolution, highlighting the requirement for further fossil evidence to test these hypotheses. Possible association between rear molar eruption, full ME ossification and ME detachment in marsupials suggests functional divergence between dentary and ME as a trigger for developmental, and possibly also evolutionary, ME detachment. The stable positioning of the dentary and ME supports suggestions that a ‘partial mammalian middle ear’ as found in many mammaliaforms—probably with a cartilaginous Meckel's cartilage—represents the only developmentally plausible evolutionary DMME precursor.

Sign in / Sign up

Export Citation Format

Share Document