Tyrosine kinases have recently been shown to modulate synaptic plasticity and ion channel function. We show here that tyrosine kinases can also modulate both the baseline excitability state of Aplysia tail sensory neurons (SNs) as well as the excitability induced by the neuromodulator serotonin (5HT). First, we examined the effects of increasing and decreasing tyrosine kinase activity in the SN...

There are many types of tyrosine kinase involved in intracellular mitogenic mechanism, particularly, Tec tyrosine kinase are involved in apoptosis pathway. Tec tyrosine kinases do not have any transmembrane domain so it is known as non receptor tyrosine kinase. There are various types of Tec tyrosine kinase like Txk, Btk, Itk, Rik and Bmx. These kinases have different protein or domain structur...

Internalization of the neurotrophin-Trk receptor complex is critical for many aspects of neurotrophin functions. The mechanisms governing the internalization process are unknown. Here, we report that neuronal activity facilitates the internalization of the receptor for brain-derived neurotrophic factor, TrkB, by potentiating its tyrosine kinase activity. Using three independent approaches, we s...

Adenosine and acetylcholine (ACh) trigger preconditioning through different signaling pathways. We tested whether either could activate myocardial phosphatidylinositol 3-kinase (PI3-kinase), a putative signaling protein in ischemic preconditioning. We used phosphorylation of Akt, a downstream target of PI3-kinase, as a reporter. Exposure of isolated rabbit hearts to ACh increased Akt phosphoryl...

Modulation of protein kinase FA/glycogen synthase kinase-3alpha (kinase FA/GSK-3alpha) by reversible tyrosine phosphorylation/dephosphorylation was investigated. In addition to genistein, other protein tyrosine kinase (PTK) inhibitors, such as tyrphostin A47 and B42, also could induce tyrosine dephosphorylation and inactivation of kinase FA/GSK-3alpha in A431 cells, and this process was found t...

Erk1/Erk2 MAP kinases are key regulators of cell behaviour and their activation is generally associated with tyrosine kinase signalling. However, TGF-beta stimulation also activates Erk MAP kinases through an undefined mechanism, albeit to a much lower level than receptor tyrosine kinase stimulation. We report that upon TGF-beta stimulation, the activated TGF-beta type I receptor (TbetaRI) recr...

People’s lives and health are gravely threatened by non-small-cell lung cancer (NSCLC). Mutations in epidermal growth factor receptor (EGFR), a transmembrane tyrosine kinase, considered one of the causes NSCLC. Tyrosine kinase inhibitors (TKIs) typically used to treat patients with EGFR mutations. In this study, Gefitinib, member first generation TKIs, was an single-point mutation (single mutan...

Novel inhibitors that target the Eph family of transmembrane tyrosine kinase receptors have been optimized and characterized. Some compounds show remarkable receptor selectivity affinity for inhibit growth colon cancer cells where these are expressed active. More information can be found in Research Article by G. Tosato, H. Schwalbe co-workers (DOI: 10.1002/chem.202203967).

OBJECTIVE The aim of this study was to evaluate the expression of protein tyrosine kinase 2 and protein tyrosine phosphatase non-receptor type 11, which respectively encode focal adhesion kinase protein and src homology 2 domain-containing protein-tyrosine phosphatase 2, in hematopoietic cells from patients with myelodysplastic syndromes. METHODS Protein tyrosine kinase 2 and tyrosine phospha...

Growth hormone receptor (GHR) forms a complex with a tyrosine kinase, suggesting involvement of a ligand-activated tyrosine kinase in intracellular signaling by growth hormone (GH). Here we identify JAK2, a nonreceptor tyrosine kinase, as a GHR-associated tyrosine kinase. Immunological approaches were used to establish GH-dependent complex formation between JAK2 and GHR, activation of JAK2 tyro...