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Neu differentiation factor/heregulin induction by hepatocyte and keratinocyte growth factors. 2000

P Castagnino, and M V Lorenzi, and J Yeh, and D Breckenridge, and H Sakata, and B Munz, and S Werner, and D P Bottaro
Laboratory of Cellular and Molecular Biology, Division of Basic Sciences, National Cancer Institute, Bethesda, Maryland 20892-4255, USA.

Hepatocyte growth-factor (HGF) is a potent, widely produced, pleiotropic mediator of mesenchymal-epithelial interaction. In a study of changes in gene expression initiated by HGF in Balb/MK keratinocytes, we observed the induction of Neu-differentiation factor (NDF) mRNA (also known as heregulin, or HRG). Further characterization of the regulation of NDF expression in Balb/MK keratinocytes revealed potent induction by keratinocyte growth factor (KGF) and epidermal growth factor (EGF), but not by HGF/NK2, an alternative HGF isoform with motogenic but not mitogenic or morphogenic activities. Sustained treatment (8 h) of Balb/MK cells with KGF stimulated secretion of mature NDF protein into the culture medium, and Balb/ MK cells treated with purified recombinant NDF protein showed increased DNA synthesis. We also found evidence of NDF induction in two models of tissue repair in mice: in full-thickness skin wounds, following locally increased KGF production, and in kidney after partial hepatectomy, following elevation of circulating HGF levels. These results reveal that mesenchymally-derived HGF and KGF can activate autocrine NDF signaling in their epithelial targets, and suggest that this mechanism contributes to the coordination of stages of wound repair, and possibly development, where these growth factors act in concert to direct epithelial proliferation, morphogenesis and differentiation.

UI MeSH Term Description Entries
D008807 Mice, Inbred BALB C An inbred strain of mouse that is widely used in IMMUNOLOGY studies and cancer research. BALB C Mice, Inbred,BALB C Mouse, Inbred,Inbred BALB C Mice,Inbred BALB C Mouse,Mice, BALB C,Mouse, BALB C,Mouse, Inbred BALB C,BALB C Mice,BALB C Mouse
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D002460 Cell Line Established cell cultures that have the potential to propagate indefinitely. Cell Lines,Line, Cell,Lines, Cell
D005346 Fibroblast Growth Factors A family of small polypeptide growth factors that share several common features including a strong affinity for HEPARIN, and a central barrel-shaped core region of 140 amino acids that is highly homologous between family members. Although originally studied as proteins that stimulate the growth of fibroblasts this distinction is no longer a requirement for membership in the fibroblast growth factor family. DNA Synthesis Factor,Fibroblast Growth Factor,Fibroblast Growth Regulatory Factor,Growth Factor, Fibroblast,Growth Factors, Fibroblast
D006133 Growth Substances Signal molecules that are involved in the control of cell growth and differentiation. Mitogens, Endogenous,Endogenous Mitogens
D000595 Amino Acid Sequence The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION. Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D012867 Skin The outer covering of the body that protects it from the environment. It is composed of the DERMIS and the EPIDERMIS.
D014945 Wound Healing Restoration of integrity to traumatized tissue. Healing, Wound,Healings, Wound,Wound Healings
D015603 Keratinocytes Epidermal cells which synthesize keratin and undergo characteristic changes as they move upward from the basal layers of the epidermis to the cornified (horny) layer of the skin. Successive stages of differentiation of the keratinocytes forming the epidermal layers are basal cell, spinous or prickle cell, and the granular cell. Keratinocyte

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