By L. A. Sklar, W. N. Swann, S. P. Fay, Z. G. Oades (auth.), Jack Y. Vanderhoek (eds.)
Intercellular communique in multicellular organisms permits cells to answer environmental alterations. Intercellular sign transduction transmitters comprise hormones, peptide development elements, neurotransmitters in addition to a few lipid-soluble mediators. as soon as signalling molecules are sure to their mobile floor receptors, a number of intracellular signs are generated which regulate the Qehavior of the objective phone. The IXth overseas Washington Spring Symposium on the George Washington collage in Washington, D.C. was once geared up to evaluate the present prestige of the sphere of sign transduction methods and regulatory mechanisms. The symposium used to be hung on may perhaps 8-'.2, 1989 and was once attended by means of greater than a thousand scientists from 30 nations. many of the papers provided on the plenary classes were gathered during this quantity. the 1st component to this e-book information the motion and law of receptors resembling ,B-pdr.'nergic receptors and receptors for EGF, insulin, leukotrienes, phosphoinositides and prostaglandins. part makes a speciality of the relatives of guanine nucleotide regulatory proteins (G proteins). those G proteins are recognized to mediate the coupling of receptor-mediated signs to numerous intracellular effector platforms. Papers are provided describing the intracellular localization of G proteins, the usage of G protein antibodies, the interplay of G proteins with tubulin and the involvement of G proteins within the rules of ion channels, adenylate cy~lase and within the activation of neutrophils and T cells. within the 3rd part, numerous papers describe the second one messenger function of phosphoinositides in addition to the rules of phosphoinositide production.
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1987). PMN leukocytes also express specific populations of receptors, that recognize and transduce responses to both LTB4 and the sulfidopeptide LTs. Leukocytic expression and characteristics of leukotriene receptors The LTB, receptors on human PMN leukocytes are present in two affinity states (Goldman & Goetzl, 1984a; Kreis1e & Parker, 1983). 4 nM and the remaining 270,000 receptors bind LTB4 with a Kd of 61 nM (Goldman & Goetzl, 1984a). , 1984). , 1984). LTB4 receptors are located primarily on the plasma membrane.
J. (1987) Inositol lipids and DNA replication. Phil. Trans. R. Soc. , 317:525. Besterman. J. , Watson, S. , and Cuatrecasas, P. (1986) Lack of association of epidermal growth factor-, insu1in-, and serum-induced mitogenesis with stimulation of phosphoinositide degradation in BALB/c 3Ta fibroblasts. ~ BioI. , 261:723. Blackshear, P. , Witters, L. , Girard, P. , Kuo, J. , and Quamo, S. N. (1985) Growth factor-stimulated protein phosphorylation in 3T3 cells: evidence for protein kinase C-dependent and -independent pathways.
H. Ligand-induced formation of a leukotriene B4 receptor-guanine nucleotide binding protein complex. Clin. Res. 36:470A, 1988b. 27 THE ROLE OF COVALENT AND NON-COVALENT MECHANISMS IN INSULIN RECEPTOR ACTION Paul L. Rothenberg and C. Ronald Kahn Departments of Pathology and Medicine, Brigham and Women's Hospital, Harvard Medical School and Joslin Diabetes Center Boston, MA 02215 Diminished cellular responsiveness to the metabolic and growth promoting effects of insulin occurs in several pathophysiological conditions -- most commonly in insulin and non-insulin dependent diabetes mellitus, but also in obesity, uremia, glucocorticoid and growth hormone excess, and in certain rare syndromes such as lipoatrophic diabetes and leprechaunism (Kahn, 1985; Reaven, 1988).