Previous studies implicate the nonreceptor protein tyrosine kinase (PTK) p59fyn in the propagation of signals from the B cell antigen receptor. To elucidate the functions of this kinase, we examined B cell responsiveness in mice engineered to lack the hematopoietic isoform of p59fyn. Remarkably, antigen receptor signaling was only modestly defective in fynTnull B cells. In contrast, signaling f...

Protein tyrosine kinases (PTKs) are critical in regulating cell growth and differentiation and are deeply involved in several cancers. PTK-inhibitors are mainly ATP-site directed and are finding use in the treatment of several cancers, and more than 30 such agents are now in phase I-III clinical trials. The present review focuses mainly on the development of PTK inhibitors in clinical trials, w...

Classroom Action Research (PTK) is one of the factors that affect teacher competence. Improvement learning in classroom can be done through action research because it places teachers as researchers, agents change whose work patterns are creative and innovative. This study aims to improve competence compiling PTK education training. an carried out two cycles including planning, action, observati...

In this study, genistein, a selective protein tyrosine kinase (PTK) inhibitor, inhibited peripheral blood mononuclear cell (PBMC) proliferation and interleukin-2 production from cultures that were stimulated with phytohemagglutinin (PHA), phorbol 12-myristate 13-acetate (PMA) plus A23187, or PHA plus PMA, and genistein effectively blocked the PHA plus IL-2-induced PBMC proliferation. Further, w...

N-formyl-methionyl-leucyl-phenylalanine (fMLP) a potent chemotactic peptide stimulates immune responses by activating macrophages and other cells of the immune system. The present study reports inhibition of fMLP-induced activation of murine peritoneal and P388D-1 macrophage cell line by protein kinase C (PKC) inhibitors, H-7 and chelerythrine chloride. Similarly, tumoricidal activity was also ...

Protein-tyrosine phosphorylation, which is catalyzed by protein-tyrosine kinase (PTK), plays a pivotal role in a variety of cellular functions related to health and disease. The discovery of the viral oncogene Src (v-Src) and its cellular nontransforming counterpart (c-Src), as the first example of PTK, has opened a window to study the relationship between protein-tyrosine phosphorylation and t...

PTK bertujuan untuk memperbaiki mutu pelaksanaan pembelajaran di kelas. memiliki peran penting dan strategis dalam upaya peningkatan kualitas belajar. Maka dari itu sekali bagi guru melaksanakan membuat karya ilmiah laporan PTK. Akan tetapi kenyataan lapangan masih banyaknya fisika SMA Aceh Tamiang yang kesulitan menyusun Penelitian Tindakan Kelas (PTK). Adapun tujuan penelitian ini adalah meng...

The 2-phenylaminopyrimidine derivative imatinib-mesylate, a powerful protein tyrosine kinase (PTK) inhibitor that targets abl, c-kit, and the platelet-derived growth factor receptors, is rapidly gaining a relevant role in the treatment of several types of neoplasms. Because first generation PTK inhibitors affect the activity of a large number of voltage-dependent ion channels, the present study...

We used Western blotting to examine the expression of phosphatidylinositol 3-kinase (PI3K) in the renal cortex and outer medulla and employed the patch-clamp technique to study the effect of PI3K on the ROMK-like small-conductance K (SK) channels in the cortical collecting duct (CCD). Low K intake increased the expression of the 110-kDa alpha-subunit (p110alpha) of PI3K compared with rats on a ...