scholarly journals Rapid Phospho-Turnover by Receptor Tyrosine Kinases Impacts Downstream Signaling and Drug Binding

2011 ◽  
Vol 43 (5) ◽  
pp. 723-737 ◽  
Author(s):  
Laura B. Kleiman ◽  
Thomas Maiwald ◽  
Holger Conzelmann ◽  
Douglas A. Lauffenburger ◽  
Peter K. Sorger
Keyword(s):  
Tyrosine Kinases ◽  
Receptor Tyrosine Kinases ◽  
Drug Binding ◽  
Downstream Signaling

scholarly journals Receptor Tyrosine Kinases in Kidney Development

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Renfang Song ◽  
Samir S. El-Dahr ◽  
Ihor V. Yosypiv
Keyword(s):  
Tyrosine Kinases ◽  
Molecular Mechanisms ◽  
Kidney Development ◽  
Receptor Tyrosine Kinases ◽  
Adaptor Proteins ◽  
Downstream Signaling ◽  
Arterial Blood ◽  
Intracellular Signal ◽  
Human Birth

The kidney plays a fundamental role in the regulation of arterial blood pressure and fluid/electrolyte homeostasis. As congenital anomalies of the kidney and urinary tract (CAKUT) constitute one of the most common human birth defects, improved understanding of the cellular and molecular mechanisms that lead to CAKUT is critical. Accumulating evidence indicates that aberrant signaling via receptor tyrosine kinases (RTKs) is causally linked to CAKUT. Upon activation by their ligands, RTKs dimerize, undergo autophosphorylation on specific tyrosine residues, and interact with adaptor proteins to activate intracellular signal transduction pathways that regulate diverse cell behaviours such as cell proliferation, survival, and movement. Here, we review the current understanding of role of RTKs and their downstream signaling pathways in the pathogenesis of CAKUT.

scholarly journals Receptor Tyrosine Kinases and Their Signaling Pathways as Therapeutic Targets of Curcumin in Cancer

2021 ◽  
Vol 12 ◽  
Author(s):  
Sareshma Sudhesh Dev ◽  
Syafiq Asnawi Zainal Abidin ◽  
Reyhaneh Farghadani ◽  
Iekhsan Othman ◽  
Rakesh Naidu
Keyword(s):  
Signaling Pathways ◽  
Cancer Progression ◽  
Tyrosine Kinases ◽  
Receptor Tyrosine Kinases ◽  
Surface Proteins ◽  
Downstream Signaling ◽  
Anti Cancer ◽  
Rtk Inhibitors

Receptor tyrosine kinases (RTKs) are transmembrane cell-surface proteins that act as signal transducers. They regulate essential cellular processes like proliferation, apoptosis, differentiation and metabolism. RTK alteration occurs in a broad spectrum of cancers, emphasising its crucial role in cancer progression and as a suitable therapeutic target. The use of small molecule RTK inhibitors however, has been crippled by the emergence of resistance, highlighting the need for a pleiotropic anti-cancer agent that can replace or be used in combination with existing pharmacological agents to enhance treatment efficacy. Curcumin is an attractive therapeutic agent mainly due to its potent anti-cancer effects, extensive range of targets and minimal toxicity. Out of the numerous documented targets of curcumin, RTKs appear to be one of the main nodes of curcumin-mediated inhibition. Many studies have found that curcumin influences RTK activation and their downstream signaling pathways resulting in increased apoptosis, decreased proliferation and decreased migration in cancer both in vitro and in vivo. This review focused on how curcumin exhibits anti-cancer effects through inhibition of RTKs and downstream signaling pathways like the MAPK, PI3K/Akt, JAK/STAT, and NF-κB pathways. Combination studies of curcumin and RTK inhibitors were also analysed with emphasis on their common molecular targets.

scholarly journals SRC Kinase in Glioblastoma: News from an Old Acquaintance

Cancers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1558 ◽  
Author(s):  
Claudia Cirotti ◽  
Claudia Contadini ◽  
Daniela Barilà
Keyword(s):  
Receptor Tyrosine Kinase ◽  
Tyrosine Kinases ◽  
Receptor Tyrosine Kinases ◽  
Metabolic Reprogramming ◽  
Constitutive Activity ◽  
Therapeutic Approaches ◽  
Resistance To Therapy ◽  
Downstream Signaling ◽  
Wide Range ◽  
Therapy Effectiveness

Glioblastoma multiforme (GBM) is one of the most recalcitrant brain tumors characterized by a tumor microenvironment (TME) that strongly supports GBM growth, aggressiveness, invasiveness, and resistance to therapy. Importantly, a common feature of GBM is the aberrant activation of receptor tyrosine kinases (RTKs) and of their downstream signaling cascade, including the non-receptor tyrosine kinase SRC. SRC is a central downstream intermediate of many RTKs, which triggers the phosphorylation of many substrates, therefore, promoting the regulation of a wide range of different pathways involved in cell survival, adhesion, proliferation, motility, and angiogenesis. In addition to the aforementioned pathways, SRC constitutive activity promotes and sustains inflammation and metabolic reprogramming concurring with TME development, therefore, actively sustaining tumor growth. Here, we aim to provide an updated picture of the molecular pathways that link SRC to these events in GBM. In addition, SRC targeting strategies are discussed in order to highlight strengths and weaknesses of SRC inhibitors in GBM management, focusing our attention on their potentialities in combination with conventional therapeutic approaches (i.e., temozolomide) to ameliorate therapy effectiveness.

Functional Profiling of Receptor Tyrosine Kinases and Downstream Signaling in Human Chondrosarcomas Identifies Pathways for Rational Targeted Therapy

2013 ◽  
Vol 19 (14) ◽  
pp. 3796-3807 ◽  
Author(s):  
Yi-Xiang Zhang ◽  
Jolieke G. van Oosterwijk ◽  
Ewa Sicinska ◽  
Samuel Moss ◽  
Stephen P. Remillard ◽  
...  
Keyword(s):  
Targeted Therapy ◽  
Tyrosine Kinases ◽  
Receptor Tyrosine Kinases ◽  
Downstream Signaling ◽  
Functional Profiling

scholarly journals Involvement of N-glycan in Multiple Receptor Tyrosine Kinases Targeted by Ling-Zhi-8 for Suppressing HCC413 Tumor Progression

Cancers ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 9 ◽  
Author(s):  
Ren-In You ◽  
Wen-Sheng Wu ◽  
Chuan-Chu Cheng ◽  
Jia-Ru Wu ◽  
Siou-Mei Pan ◽  
...  
Keyword(s):  
Cell Migration ◽  
Tyrosine Kinases ◽  
Poor Prognosis ◽  
Tumor Metastasis ◽  
Receptor Tyrosine Kinases ◽  
Target Therapy ◽  
Downstream Signaling ◽  
The Poor ◽  
And Function ◽  
Multiple Receptor

The poor prognosis of hepatocellular carcinoma (HCC) is resulted from tumor metastasis. Signaling pathways triggered by deregulated receptor tyrosine kinases (RTKs) were the promising therapeutic targets for prevention of HCC progression. However, RTK-based target therapy using conventional kinase-based inhibitors was often hampered by resistances due to compensatory RTKs signaling. Herein, we report that Ling-Zhi-8 (LZ-8), a medicinal peptide from Ganoderma lucidium, was effective in suppressing cell migration of HCC413, by decreasing the amount and activity of various RTKs. These led to the suppression of downstream signaling including phosphorylated JNK, ERK involved in HCC progression. The capability of LZ-8 in targeting multiple RTKs was ascribed to its simultaneous binding to these RTKs. LZ-8 may bind on the N-linked glycan motif of RTKs that is required for their maturation and function. Notably, pretreatment of the N-glycan trimming enzyme PNGase or inhibitors of the mannosidase (N-glycosylation processing enzyme), kifunensine (KIF) and swainsonine (SWN), prevented LZ-8 binding on the aforementioned RTKs and rescued the downstream signaling and cell migration suppressed by LZ-8. Moreover, pretreatment of KIF prevented LZ-8 triggered suppression of tumor growth of HCC413. Our study suggested that a specific type of N-glycan is the potential target for LZ-8 to bind on multiple RTKs for suppressing HCC progression.

scholarly journals Intramolecular Regulatory Switch in ZAP-70: Analogy with Receptor Tyrosine Kinases

2005 ◽  
Vol 25 (12) ◽  
pp. 4924-4933 ◽  
Author(s):  
Tomas Brdicka ◽  
Theresa A. Kadlecek ◽  
Jeroen P. Roose ◽  
Alexander W. Pastuszak ◽  
Arthur Weiss
Keyword(s):  
Tyrosine Kinases ◽  
Protein Tyrosine Kinase ◽  
Catalytic Domain ◽  
Receptor Tyrosine Kinases ◽  
Kinase Domain ◽  
Sh2 Domains ◽  
Downstream Signaling ◽  
Juxtamembrane Region ◽  
Activated T Cell ◽  
Regulatory Effects

ABSTRACT ZAP-70, a Syk family cytoplasmic protein tyrosine kinase (PTK), is required to couple the activated T-cell antigen receptor (TCR) to downstream signaling pathways. It contains two tandem SH2 domains that bind to phosphorylated TCR subunits and a C-terminal catalytic domain. The region connecting the SH2 domains with the kinase domain, termed interdomain B, has previously been shown to have striking regulatory effects on ZAP-70 function, presumed to be due to the recruitment of key substrates. Paradoxically, deletion of interdomain B preserves ZAP-70 function. Recent structural studies of several receptor tyrosine kinases (RTKs) revealed that their juxtamembrane regions negatively regulate their catalytic activities. In EphB2 and several other RTKs, this autoinhibition depends upon interaction between the kinase domain and tyrosine residues within the juxtamembrane region. Autoinhibition is released when these tyrosines become phosphorylated following receptor stimulation. Sequence homology suggested analogous regulation for ZAP-70. Based on mutagenesis analysis of ZAP-70 interdomain B, we find that this region downregulates ZAP-70 catalytic activity in a similar manner as the juxtamembrane region of EphB2. Similar regulation was also noted for the related Syk kinase. These findings suggest that a general autoinhibitory mechanism employed by RTKs is also used by some cytoplasmic tyrosine kinases.

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