title: Hedgehog signaling in mouse mammary gland development and neoplasia.
abstract: Genetic analyses of two hedgehog signal transduction network genes, Patched-1 and Gli2, has demonstrated a critical role for hedgehog signaling in mediating epithelial-stromal tissue interactions during ductal development. Disruption of either gene leads to similar, yet distinct, defects in ductal morphogenesis. Defects are mainly ductal dysplasias that closely resemble some hyperplasias of the human breast. Phenotypic analyses have been coupled with in situ hybridization, transplantation and tissue recombination analyses to formulate a model for tissue compartment-specific control of mouse mammary gland development by hedgehog signaling. In addition, the similarities among hedgehog mutation-induced ductal dysplasias and human breast pathologies suggest a role for altered hedgehog signaling in the development of mammary cancer.
authors.affiliation: University of Colorado Health Sciences Center, Department of Physiology, Denver 80262, USA. mike.lewis@uchsc.edu
authors.forename: M T
authors.initials: MT
authors.lastname: Lewis
mesh_terms: D000818:Animals; D001940:Breast / Q000254:growth & development*; D005260:Female; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins; D051741:Kruppel-Like Transcription Factors; D015674:Mammary Neoplasms, Animal / Q000378:metabolism*; D008565:Membrane Proteins / Q000502:physiology*; D051379:Mice; D009687:Nuclear Proteins; D000072079:Patched Receptors; D000072081:Patched-1 Receptor; D011956:Receptors, Cell Surface; D015398:Signal Transduction / Q000502:physiology*; D014157:Transcription Factors / Q000502:physiology*; D000075746:Zinc Finger Protein Gli2
chemical_list: C082593:GLI2 protein, human; C000618551:Gli2 protein, mouse; D047908:Intracellular Signaling Peptides and Proteins; D051741:Kruppel-Like Transcription Factors; D008565:Membrane Proteins; D009687:Nuclear Proteins; C000606236:PTCH1 protein, human; D000072079:Patched Receptors; D000072081:Patched-1 Receptor; C000606240:Ptch1 protein, mouse; D011956:Receptors, Cell Surface; D014157:Transcription Factors; D000075746:Zinc Finger Protein Gli2