Results 11 to 20 of about 2,691,785 (114)

Neural crest ontogeny during secondary neurulation: a gene expression pattern study in the chick embryo [PDF]

The International Journal of Developmental Biology, 2009
In the prospective lumbo-sacral region of the chick embryo, neurulation is achieved by cavitation of the medullary cord, a process called secondary neurulation. Neural crest cells (NCC) are generated in this region and they give rise to the same types of derivatives as in more rostral parts of the trunk where neurulation occurs by dorsal fusion of the ...
Catala, Martin, Osório, Liliana, Teillet, Marie Aimée, Palmeirim, Isabel   +3 more
openaire   +7 more sources

Secondary neurulation-fated cells in the tail bud undergo self-renewal and tubulogenesis regulated by a Sox2 gradient [PDF]

, 2018
Abstract During amniote development, anterior and posterior components of the neural tube form by primary neurulation (PN) and secondary neurulation (SN), respectively. Unlike PN, SN proceeds by the mesenchymal-to-epithelial transition of SN precursors in the tail bud, a critical structure for the axial elongation ...
Kawachi, Teruaki, Shimokita, Eisuke, Tadokoro, Ryosuke, Takahashi, Yoshiko   +3 more
openaire   +3 more sources

Neural-fated self-renewing cells regulated by Sox2 during secondary neurulation in chicken tail bud

Developmental Biology, 2020
In amniotes, unlike primary neurulation in the anterior body, secondary neurulation (SN) proceeds along with axial elongation by the mesenchymal-to-epithelial transition of SN precursors in the tail bud. It has been under debate whether the SN is generated by neuromesodermal common progenitor cells (NMPs) or neural restricted lineage.
Teruaki, Kawachi, Eisuke, Shimokita, Ryo, Kudo, Ryosuke, Tadokoro, Yoshiko, Takahashi   +4 more
openaire   +4 more sources

Formation of Intercellular Junctions During Secondary Neurulation in the Tail Bud Region of Developing Chick Embryos [PDF]

, 2011
During secondary neurulation, the tail bud of the developing chick embryo undergoes a transition from unorganized mesenchymal cells to a structured epithelial tube.
Losee, Selena Mae
core   +1 more source

Loss of Twist1 leads to disruption of ciliary length, endocytic vesicle dynamics, and cell–cell junctions during neural tube formation

Developmental Dynamics, EarlyView.
Abstract Background Endocytosis constitutes a fundamental cellular process governing development through coordinated regulation of plasma membrane remodeling and ciliogenesis, processes essential for cell shape changes and tissue development. Although Twist1 null embryos display complete cranial neural tube (NT) closure defects and conditional knockout
Derrick Thomas, Brittany M. Hufft‐Martinez, Zarna Lalwani, Vi Pham, Mary Elmeniawi, An J. Tran, Jianming Xu, Irfan Saadi, Walid D. Fakhouri   +8 more
wiley   +1 more source

Zebrafish ventral gastrula fate map reveals neural crest progenitor domain

Developmental Dynamics, EarlyView.
Abstract Background Fate maps relate progenitor cell positions to later fates and locations of their progeny, revealing early embryonic organization. Previous zebrafish fate maps identified the origin of germ layers and derivative cell fates, but ventral gastrula progenitor domains were not fully resolved. In particular, the neural crest, a multipotent
Elaine E. Kushkowski, Victoria E. Prince
wiley   +1 more source

Dynamics of Size and Shape Variation During Embryonic Development in the Balkan Crested Newt

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, EarlyView.
Morphological variance in Triturus ivanbureschi embryos fluctuates during the tailbud phase, coinciding with developmental arrest caused by the balanced lethal system. Prehatching embryos show uniform variance. Our study reveals dynamics of morphological variability during early development and provides a baseline for further studies.
Marko Bugarčić, Ana Ivanović, Milena Cvijanović, Maja Ajduković, Marija Drobnjaković, Ben Wielstra, Tijana Vučić   +6 more
wiley   +1 more source

Embryonic and larval development of the endangered Chiapas killifish Tlaloc hildebrandi (Cyprinodontiformes: Profundulidae)

Journal of Fish Biology, EarlyView.
Abstract The early ontogeny of endemic freshwater fishes provides essential baseline biological information for conservation and management, particularly in species with restricted distributions and high vulnerability to habitat degradation, environmental change and population decline. This study presents the first detailed description of embryonic and
Rubén Alonso Contreras‐Tapia, Gabriela Garza‐Mouriño, María Elena Castellanos‐Páez, Marcela Ivonne Benítez‐Díaz Mirón, Jairo Arroyave, Alfonso Ángel González‐Díaz, Wilfredo A. Matamoros   +6 more
wiley   +1 more source

Complete surgical excision of a type V‐variant dermoid sinus (V/VI overlap) associated with spina bifida in a Shiba Inu dog: A case report

Veterinary Surgery, EarlyView.
Abstract Objective To describe the clinical, imaging, surgical, and histopathologic features of a type V/VI overlap dermoid sinus (DS), and highlight diagnostic and therapeutic considerations. Study design Case report. Animal A 16‐month‐old spayed female Shiba Inu dog.
Ji‐Eun Jeong, Sun‐Young Kim, Jong‐In Kim   +2 more
wiley   +1 more source

Essential embryology for the Canadian pathologists’ assistant

Anatomical Sciences Education, Volume 19, Issue 7, Page 1134-1156, July 2026.
Abstract Pathologists' assistants (PAs) are pivotal in healthcare, conducting autopsies and examining tissues under a pathologist's guidance. Embryology knowledge is crucial for PAs to accurately assess anomalies and identify pathologies. Yet, it is often overlooked in academic PA training programs.
Samantha H. Nacci, William Tsui, Fang‐I Lu, Avrum I. Gotlieb, Danielle C. Bentley   +4 more
wiley   +1 more source