Chitosan has been shown to be effective in regulating progenitor salivary tissue morphogenesis, however, the specificity of chitosan effects remains unclear. To assess the regulatory ability of chitosan in salivary gland morphogenesis, progenitor salivary tissue from embryonal submandibular gland (SMG) was cultured in chitosan-containing medium. It was found that soluble chitosan was able to pr...

The complex organic forms we find in nature are typically difficult to geometrically model using traditional 3D modelling tools. This is because they often have complex surfaces and large number of components, which are tedious to create when manipulating the geometric model directly. One approach to this problem is to generate the geometry through simulation. The Simplicial Developmental Syste...

Tubular structures are a fundamental anatomic theme recurring in a wide range of animal species. In mammals, tubulogenesis underscores the development of several systems and organs, including the vascular system, the lungs, and the kidneys. All tubular systems are hierarchical, branching into segments of gradually diminishing diameter. There are only 2 cell types that form the lumen of tubular ...

Mutations in WNT effector genes perturb hair follicle morphogenesis, suggesting key roles for WNT proteins in this process. We show that expression of Wnts 10b and 10a is upregulated in placodes at the onset of follicle morphogenesis and in postnatal hair follicles beginning a new cycle of hair growth. The expression of additional Wnt genes is observed in follicles at later stages of differenti...

During vertebrate heart development, two progenitor populations, first and second heart fields (FHF, SHF), sequentially contribute to longitudinal subdivisions of the heart tube (HT), with the FHF contributing the left ventricle and part of the atria, and the SHF the rest of the heart. Here, we study the dynamics of cardiac differentiation and morphogenesis by tracking individual cells in live ...

5 Paper in this licentiate thesis 7 Abbreviations 8 Introduction 9 The hair follicle 9 Hair follicle morphogenesis 10 Molecular regulation of the HF morphogenesis 12 The hair cycle 13 Catagen 14 Telogen 15 Anagen 15 LIM-homeodomain transcription factors 18 Lhx2 19 Aim 21 Results and discussion 22 Expression of Lhx2 during HF morphogenesis and postnatal cycling 22 Transgenic over-expression of L...

PURPOSE The authors investigated the effects of probes that disrupt integrin-extracellular matrix interactions on early eye development. METHODS Antibodies and peptides that have been shown in other studies to block the interaction of cell surface integrins with various ligands were microinjected into the preoptic regions of chick embryos. Eye morphogenesis and biochemical differentiation of ...

Several organs, including the lungs and kidneys, are formed by epithelial tubes whose proper morphogenesis ensures correct function. This is best exemplified by the kidney, where defective establishment or maintenance of tubular diameter results in polycystic kidney disease, a common genetic disorder. Most polycystic kidney disease cases result from loss-of-function mutations in the PKD1 gene, ...

The Drosophila Malpighian tubule is a model system for studying genetic mechanisms that control epithelial morphogenesis. From a screen of 1800 second chromosome lethal lines, by observing uric acid deposits in unfixed inviable embryos, we identified five previously described genes (barr, fas, flb, raw, and thr) and one novel gene, walrus (wal), that affect Malpighian tubule morphogenesis. Phen...

Throughout his long and fruitful career John Tyler Bonner [4] has made great strides in understanding basic issues of embryology [5] and developmental-evolutionary biology. Indeed, Bonner?s work on morphogenesis highlighted synergies between development and evolution [6] long before ? evo-devo? became a part of the scientific lingua franca. Princeton University [7] Press published his first boo...