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The uterusmasculinus of the Eurasian beaver (Castor fever L.) - The appraisal of fast hormone regulation by membrane androgen and estrogen receptors involvement.
Gen Comp Endocrinol
January 2024
Department of Animal Anatomy and Preclinical Sciences, University Centre of Veterinary Medicine JU-UA, University of Agriculture in Krakow, Mickiewicza 24/28, 30-059, Krakow, Poland.
The phenomenon of remaining paramesonephric ducts (uterus masculinus) in males of some animal species concerning its role is still an unresolved issue. Now it is well-recognized that sex hormonal regulation of reproductive physiology involves also fast nongenomic control of cellular processes through noncanonical signaling. Herein, in the uterus masculinus of Eurasian beaver membrane androgen receptor (metal ion transporter Zrt- and Irt-like protein 9; ZIP9) and membrane estrogen receptor (G protein-coupled estrogen receptor; GPER) were studied.
View Article and Find Full Text PDFThe ultrastructural nature of human oocytes' cytoplasmic abnormalities and the role of cytoskeleton dysfunction.
F S Sci
November 2023
Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic; Reprofit International, Clinic of Reproductive Medicine, Brno, Czech Republic. Electronic address:
Objective: To investigate the structural bases of human oocytes' cytoplasmic abnormalities and the causative mechanism of their emergence. Knowledge of an abnormal oocyte's intracellular organization is vital to establishing reliable criteria for clinical evaluation of oocyte morphology.
Design: Laboratory-based study on experimental material provided by a private assisted reproduction clinic.
Effective mechanical potential of cell-cell interaction explains three-dimensional morphologies during early embryogenesis.
PLoS Comput Biol
August 2023
Division of Embryology, National Institute for Basic Biology, Myodaiji, Okazaki, Aichi, Japan.
Article Synopsis
- Mechanical forces play a crucial role in shaping the diverse 3D forms of multicellular systems, but understanding the specific cellular mechanical parameters influencing tissue morphology has been challenging due to limitations in live measurements.
- A new framework was created to model the mechanical forces in cell-cell interactions by treating cells as particles and deriving effective forces based on statistical analysis of cell tracking data.
- The study revealed that these interaction forces can be represented as pairwise potential energy that varies with cell distances, and significant differences in this energy profile exist among different species and embryonic stages, correlating with variations in their morphological characteristics.
Evolution of homology: From archetype towards a holistic concept of cell type.
J Morphol
April 2023
Laboratory for Mathematic Methods and Models in Bioinformatics, Institute for Information Transmission Problems (Kharkevich Institute), Russian Academy of Sciences, Moscow, Russia.
The concept of homology lies in the heart of comparative biological science. The distinction between homology as structure and analogy as function has shaped the evolutionary paradigm for a century and formed the axis of comparative anatomy and embryology, which accept the identity of structure as a ground measure of relatedness. The advent of single-cell genomics overturned the classical view of cell homology by establishing a backbone regulatory identity of cell types, the basic biological units bridging the molecular and phenotypic dimensions, to reveal that the cell is the most flexible unit of living matter and that many approaches of classical biology need to be revised to understand evolution and diversity at the cellular level.
View Article and Find Full Text PDFGenome-wide analysis of anterior-posterior mRNA regionalization in reveals a role for the microtubule cytoskeleton.
bioRxiv
October 2024
Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, USA.
Cells have complex and beautiful structures that are important for their function. However, understanding the molecular mechanisms that produce these structures is a challenging problem due to the gap in size scales between molecular interactions and cellular structures. The giant ciliate is a unicellular model organism whose large size, reproducible structure, and ability to heal wounds and regenerate have historically allowed the formation of structure in a single cell to be addressed using methods of experimental embryology.
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