51
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Gamou S, Shimizu N. Calphostin-C stimulates epidermal growth factor receptor phosphorylation and internalization via light-dependent mechanism. J Cell Physiol 1994; 158:151-9. [PMID: 7505275 DOI: 10.1002/jcp.1041580119] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Calphostin-C with perylenequinone structure is known to bind the regulatory domain of protein kinase C (PKC) and to inhibit kinase activity in vitro in a light-dependent fashion. We have found that calphostin-C induces substantial serine and threonine phosphorylation of the epidermal growth factor (EGF) receptor in a light-dependent fashion in the EGF receptor-hyperproducing squamous carcinoma cell line NA. Tryptic phospho-peptide mapping and phospho-amino acid analysis revealed that calphostin-C-enhanced phosphorylation was on threonine 669, serine 671, serine 1046/1047, and serine 1166. However, calphostin-C did not inhibit phosphorylation of the 80 K protein, a cytosolic major substrate of PKC (MARCKS). Staurosporine, a potent PKC inhibitor with affinity for the catalytic domain of PKC, inhibited phosphorylation of the 80 K protein and 12-O-tetradecanoyl-13-phorbol acetate induction of EGF receptor phosphorylation but did not inhibit the calphostin-C induction of the EGF receptor phosphorylation. These results suggest that the target of calphostin-C in vivo is different from that of staurosporine and thus calphostin-C in vivo does not inhibit PKC. Furthermore, calphostin-C enhanced the internalization of phosphorylated EGF receptor. Thus, calphostin-C apparently activates a novel signal transduction pathway which involves phosphorylation and internalization of the EGF receptor via light-dependent mechanism.
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Affiliation(s)
- S Gamou
- Department of Molecular Biology, Keio University School of Medicine, Tokyo, Japan
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52
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Membrane Receptors. Mol Endocrinol 1994. [DOI: 10.1016/b978-0-12-111231-8.50011-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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53
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Gandino L, Longati P, Medico E, Prat M, Comoglio P. Phosphorylation of serine 985 negatively regulates the hepatocyte growth factor receptor kinase. J Biol Chem 1994. [DOI: 10.1016/s0021-9258(17)42099-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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54
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Hosoi K, Kurihara K, Ueha T. Bradykinin-stimulated transient modulation of epidermal growth factor receptors in A-431 human epidermoid carcinoma cells. J Cell Physiol 1993; 157:1-12. [PMID: 8408228 DOI: 10.1002/jcp.1041570102] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Of nine biological factors (ATP, bradykinin, vasopressin, substance P, angiotensin II, norepinephrine, epinephrine, 12-tetradecanoylphorbol 13-acetate (TPA), and A23187 calcium ionophore) examined, bradykinin, as well as ATP, TPA, and A23187, significantly increased the phosphorylation of epidermal growth factor (EGF) receptors and reduced the binding of EGF to their high-affinity site. The reduction in EGF binding by bradykinin, ATP, and TPA was similarly reversed by concomitant incubation with staurosporine, a protein kinase C inhibitor, implying that the phosphorylation of EGF receptors was catalyzed probably by a protein kinase C of the same or similar type in each case. This possibility was confirmed by the fact that the major phosphorylation site of EGF receptors by the stimulation with either bradykinin, ATP, or TPA was the same (Thr-654). Different from the stimulations with ATP and TPA, the effect of bradykinin of decreasing the high-affinity EGF binding was transient (a minimum binding at 2.5 min); the reduced EGF binding was, however, sustained for up to 30 min in the presence of calyculin A, a phosphoprotein phosphatase inhibitor. Moreover, the homogenate prepared from bradykinin-stimulated A-431 cells had stronger dephosphorylation activity for phosphorylated EGF receptors than that from control cells. These results suggest that bradykinin stimulates both the protein kinase C system and a phosphoprotein phosphatase(s) activity in A-431 cells. Such biphasic effects of bradykinin to phosphorylate and dephosphorylate EGF receptors via protein kinase C and a phosphoprotein phosphatase, respectively, imply a homeostatic control of receptor function in regulating phosphorylation level by the same bioactive factor.
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Affiliation(s)
- K Hosoi
- Department of Oral Physiology, Meikai University, School of Dentistry, Saitama, Japan
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55
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Kuppuswamy D, Dalton M, Pike L. Serine 1002 is a site of in vivo and in vitro phosphorylation of the epidermal growth factor receptor. J Biol Chem 1993. [DOI: 10.1016/s0021-9258(17)46744-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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56
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Abstract
Type 1 transforming growth beta (TGF-beta 1) is a multifunctional regulator of cellular differentiation, motility and growth. It is capable of inhibiting or stimulating these processes depending on cell type, cell density, culture conditions and TGF-beta 1 concentration. TGF-beta 1 regulates growth, in part, by inducing the expression and secretion of various types of collagen, which participate in the control of cell adhesion and migration, as well as growth. TGF-beta 1 also regulates cell growth by controlling the response to epidermal growth factor (EGF) and other growth factors, in ways that can either decrease or increase their growth-promoting effects. Alterations in both negative and positive growth responses to TGF-beta 1 play important roles in tumor progression. Loss of sensitivity to growth inhibition by TGF-beta 1 can occur as a result of decreased expression of collagen. Acquisition of sensitivity to growth stimulation, and autocrine transformation by TGF-beta 1, are associated with aberrant EGF receptor regulation. Aberrant growth factor receptor regulation by TGF-beta 1 may be mediated by a protein kinase C (PKC)-dependent pathway which inhibits degradation of growth factor receptor/ligand complexes. The evidence reviewed is consistent with a minimal two-step mechanism for autocrine transformation, which involves production of growth factor and enhanced cellular response as a result of aberrant membrane traffic. Defects in membrane traffic regulation may provide an explanation for common alterations in tumor cell response to both multiple growth inhibitors and growth stimulators, and may also suggest novel approaches to cancer chemotherapy.
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Affiliation(s)
- M J Newman
- Oncology Research Program, Sandoz Research Institute, Sandoz Pharmaceuticals Corp, Hanover, NJ 07936
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57
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Identification of a human epidermal growth factor receptor-associated protein kinase as a new member of the mitogen-activated protein kinase/extracellular signal-regulated protein kinase family. J Biol Chem 1993. [DOI: 10.1016/s0021-9258(17)46832-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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58
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Role of threonine residues in regulation of the epidermal growth factor receptor by protein kinase C and mitogen-activated protein kinase. J Biol Chem 1993. [DOI: 10.1016/s0021-9258(18)82290-6] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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59
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Mitogen-activated protein kinase stimulation by a tyrosine kinase-negative epidermal growth factor receptor. J Biol Chem 1993. [DOI: 10.1016/s0021-9258(18)53989-2] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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60
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Janakidevi K, Fisher MA, Del Vecchio PJ, Tiruppathi C, Figge J, Malik AB. Endothelin-1 stimulates DNA synthesis and proliferation of pulmonary artery smooth muscle cells. THE AMERICAN JOURNAL OF PHYSIOLOGY 1992; 263:C1295-301. [PMID: 1476170 DOI: 10.1152/ajpcell.1992.263.6.c1295] [Citation(s) in RCA: 127] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Endothelin-1 (ET-1), a 21-amino acid peptide released from the endothelium, elicits a variety of biological effects that include vascular smooth muscle cell (VSMC) contraction, release of secondary mediators, and cell proliferation. The present study was undertaken to examine the proliferative potential of ET-1 toward pulmonary artery VSMC in culture. In the presence of low serum and epidermal growth factor (EGF), ET-1 stimulated marked DNA synthesis and proliferation of VSMC. The contributing factor from serum appeared to be platelet-derived growth factor (PDGF) because the antibody to PDGF eliminated the stimulatory activity. The antibody to EGF also prevented the stimulation, suggesting that both PDGF and EGF are required for the full expression of the VSMC growth-promoting activity of ET-1. A paradoxical aspect of ET-1 effect on VSMC was the ability of ET-1 to inhibit the EGF-stimulated DNA synthesis when the two factors were added together to a high baseline DNA synthetic activity. The inhibition was prevented if ET-1 was added 12-18 h after the addition of EGF or if ET-1 and EGF were added to a protein kinase C-depleted VSMC. The inhibition by ET-1 may be mediated by protein kinase C activation followed by inhibition of EGF binding to its receptor. The results indicate that ET-1 under appropriate conditions can modulate the growth of pulmonary artery VSMC in both positive and negative directions.
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Affiliation(s)
- K Janakidevi
- Department of Physiology and Cell Biology, Albany Medical College, Union University, New York 12208
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61
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Prigent SA, Lemoine NR. The type 1 (EGFR-related) family of growth factor receptors and their ligands. ACTA ACUST UNITED AC 1992; 4:1-24. [PMID: 1355372 DOI: 10.1016/0955-2235(92)90002-y] [Citation(s) in RCA: 238] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
This review considers the biology of the type 1 growth factor receptor family which is increasingly recognised as important in the control of normal cell proliferation and in the pathogenesis of human cancer. The family currently comprises three closely related members: the epidermal growth factor (EGF) receptor, c-erbB-2 and c-erbB-3, all of which show abnormalities of expression in various human tumours. The family of factors related to EGF has also expanded recently and now includes transforming growth factor alpha, heparin-binding EGF, amphiregulin, cripto and heregulin, as well as several other potential ligands for the c-erbB2-2 receptor. The involvement of these receptors and growth factors in human cancer has implications for the design of novel forms of therapy for cancer, and we review recent advances and future avenues for investigation.
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Affiliation(s)
- S A Prigent
- Royal Postgraduate Medical School, Hammersmith Hospital, London, U.K
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62
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Theroux S, Latour D, Stanley K, Raden D, Davis R. Signal transduction by the epidermal growth factor receptor is attenuated by a COOH-terminal domain serine phosphorylation site. J Biol Chem 1992. [DOI: 10.1016/s0021-9258(18)42048-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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63
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Sanghera JS, Hall FL, Warburton D, Campbell D, Pelech SL. Identification of epidermal growth factor Thr-669 phosphorylation site peptide kinases as distinct MAP kinases and p34cdc2. BIOCHIMICA ET BIOPHYSICA ACTA 1992; 1135:335-42. [PMID: 1320411 DOI: 10.1016/0167-4889(92)90240-c] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A synthetic peptide modeled after the major threonine (T669) phosphorylation site of the epidermal growth factor (EGF) receptor was an efficient substrate (apparent Km approximately 0.45 mM) for phosphorylation by purified p44mpk, a MAP kinase from sea star oocytes. The peptide was also phosphorylated by a related human MAP kinase, which was identified by immunological criteria as p42mapk. Within 5 min of treatment of human cervical carcinoma A431 cells with EGF or phorbol myristate acetate (PMA), a greater than 3-fold activation of p42mapk was measured. However, Mono Q chromatography of A431 cells extracts afforded the resolution of at least three additional T669 peptide kinases, some of which may be new members of the MAP kinase family. One of these (peak I), which weakly adsorbed to Mono Q, phosphorylated myelin basic protein (MBP) and other MAP kinase substrates, immunoreacted as a 42 kDa protein on Western blots with four different MAP kinase antibodies, and behaved as a approximately 45 kDa protein upon Superose 6 gel filtration. Another T669 peptide kinase (peak IV), which bound more tightly to Mono Q than p42mapk (peak II), exhibited a nearly identical substrate specificity profile to that of p42mapk, but it immunoreacted as a 40 kDa protein only with anti-p44mpk antibody on Western blots, and eluted from Superose 6 in a high molecular mass complex of greater than 400 kDa. By immunological criteria, the T669 peptide kinase in Mono Q peak III was tentatively identified as an active form of p34cdc2 associated with cyclin A. The Mono Q peaks III and IV kinases were modestly stimulated following either EGF or PMA treatments of A431 cells, and they exhibited a greater T669 peptide/MBP ratio than p42mapk. These findings indicated that multiple proline-directed kinases may mediate phosphorylation of the EGF receptor.
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Affiliation(s)
- J S Sanghera
- Kinetic Biotechnology Corporation, University of British Columbia, Vancouver, Canada
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64
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Iwashita S, Kobayashi M. Signal transduction system for growth factor receptors associated with tyrosine kinase activity: epidermal growth factor receptor signalling and its regulation. Cell Signal 1992; 4:123-32. [PMID: 1616819 DOI: 10.1016/0898-6568(92)90076-k] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- S Iwashita
- Laboratory of Cellular Biochemistry, Mitsubishi Kasei Institute of Life Sciences, Tokyo, Japan
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65
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Mechanism of desensitization of the epidermal growth factor receptor protein-tyrosine kinase. J Biol Chem 1992. [DOI: 10.1016/s0021-9258(18)48406-2] [Citation(s) in RCA: 116] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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66
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Abstract
Biochemical membrane alterations appearing during the process of chemical carcinogenesis are described. Emphasis is put on membrane composition, structure, and biogenesis. In this presentation the knowledge gained from experimental studies of liver and skin in the process of cancer development is acknowledged. Important biochemical changes have been reported in lipid composition, fatty acid saturation, constitutional enzyme expression, receptor turnover and oligomerization. Functional consequences of the altered membrane structure is discussed within the concepts of regulation of cell proliferation, regulation of membrane receptor expression, redox control, signal transduction, drug metabolism, and multidrug resistance. Data from malignant tumours and normal tissue are addressed to evaluate the importance of the alterations for the process and for the eventual malignant transformation.
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Affiliation(s)
- L C Eriksson
- Karolinska Institute, Department of Pathology, Huddinge University Hospital, Sweden
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67
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Lee AW. Signal transduction by the colony-stimulating factor-1 receptor; comparison to other receptor tyrosine kinases. CURRENT TOPICS IN CELLULAR REGULATION 1992; 32:73-181. [PMID: 1318184 DOI: 10.1016/b978-0-12-152832-4.50005-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- A W Lee
- Clinical Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892
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68
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Hernández-Sotomayor S, Mumby M, Carpenter G. Okadaic acid-induced hyperphosphorylation of the epidermal growth factor receptor. Comparison with receptor phosphorylation and functions affected by another tumor promoter, 12-O-tetradecanoylphorbol-13-acetate. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(18)54852-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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69
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Gonzalez F, Raden D, Davis R. Identification of substrate recognition determinants for human ERK1 and ERK2 protein kinases. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(18)54548-8] [Citation(s) in RCA: 189] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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70
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Winston JT, Olashaw NE, Pledger WJ. Regulation of the transmodulated epidermal growth factor receptor by cholera toxin and the protein phosphatase inhibitor okadaic acid. J Cell Biochem 1991; 47:79-89. [PMID: 1658015 DOI: 10.1002/jcb.240470110] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Addition of tumor promoting phorbol esters, such as phorbol 12-myristate 13-acetate (PMA), to many cell lines results in a decrease of 125I-epidermal growth factor (EGF) binding and increased serine/threonine phosphorylation of the EGF receptor in a process termed transmodulation. It is, however, unclear whether or not receptor phosphorylation is causally related to the inhibition of high affinity EGF binding. We have investigated the significance of phosphorylation/dephosphorylation events in the mechanism of PMA-induced transmodulation using the adenylate cyclase activator cholera toxin and the serine/threonine protein phosphatase inhibitor okadaic acid. In Rat-1 fibroblasts treated at 37 degrees C, PMA induced a rapid decrease in EGF binding which persisted for 3 hours. In contrast, cells exposed to PMA in the presence of cholera toxin exhibited a marked recovery of binding within 60 minutes. The PMA-stimulated decrease in binding correlated with a rapid increase in the phosphorylation state of the EGF receptor. While phosphorylation of the receptor was sustained at an elevated level for at least three hours in cells receiving PMA alone, EGF receptor phosphorylation decreased between 1 and 3 hours in cells treated with PMA and cholera toxin. Furthermore, the cholera toxin-stimulated return of EGF binding was inhibited by treatment with the phosphatase inhibitor okadaic acid. These results suggest that a cholera toxin-activated phosphatase can increase binding capacity of the transmodulated EGF receptor in Rat-1 cells. Cholera toxin treatment elicited a qualitatively similar response in cells transmodulated by platelet-derived growth factor (PDGF). Okadaic acid antagonized the natural return of binding observed in cells stimulated with PDGF alone, indicating that a dephosphorylation event may be required for the recovery of normal EGF binding after receptor transmodulation.
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Affiliation(s)
- J T Winston
- Department of Cell Biology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232
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71
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Alvarez E, Northwood I, Gonzalez F, Latour D, Seth A, Abate C, Curran T, Davis R. Pro-Leu-Ser/Thr-Pro is a consensus primary sequence for substrate protein phosphorylation. Characterization of the phosphorylation of c-myc and c-jun proteins by an epidermal growth factor receptor threonine 669 protein kinase. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(18)98613-8] [Citation(s) in RCA: 325] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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72
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Northwood I, Gonzalez F, Wartmann M, Raden D, Davis R. Isolation and characterization of two growth factor-stimulated protein kinases that phosphorylate the epidermal growth factor receptor at threonine 669. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(18)98612-6] [Citation(s) in RCA: 94] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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73
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Reconstitution of the high affinity epidermal growth factor receptor on cell-free membranes after transmodulation by platelet-derived growth factor. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(18)49908-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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74
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Bowen S, Stanley K, Selva E, Davis RJ. Constitutive phosphorylation of the epidermal growth factor receptor blocks mitogenic signal transduction. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(17)35297-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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75
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Houslay MD. 'Crosstalk': a pivotal role for protein kinase C in modulating relationships between signal transduction pathways. EUROPEAN JOURNAL OF BIOCHEMISTRY 1991; 195:9-27. [PMID: 1846812 DOI: 10.1111/j.1432-1033.1991.tb15671.x] [Citation(s) in RCA: 273] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- M D Houslay
- Department of Biochemistry, University of Glasgow, Scotland, UK
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76
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77
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Fabbro D, Küng W, Costa SD, Borner C, Regenass U, Eppenberger U. Involvement of protein kinase C in the growth regulation of human breast cancer cells. Cancer Treat Res 1991; 61:229-48. [PMID: 1360235 DOI: 10.1007/978-1-4615-3500-3_12] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
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78
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Lund KA, Lazar CS, Chen WS, Walsh BJ, Welsh JB, Herbst JJ, Walton GM, Rosenfeld MG, Gill GN, Wiley HS. Phosphorylation of the epidermal growth factor receptor at threonine 654 inhibits ligand-induced internalization and down-regulation. J Biol Chem 1990. [DOI: 10.1016/s0021-9258(17)30533-1] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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79
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