Is p38 a tumor suppressor?

Is p38 a tumor suppressor?

Recent emerging evidence suggests that the p38 stress MAPK pathway may function as a tumor suppressor through regulating Ras-dependent and -independent proliferation, transformation, invasion and cell death by isoform-specific mechanisms.

What is p38 in biology?

p38 mitogen-activated protein kinases are a class of mitogen-activated protein kinases (MAPKs) that are responsive to stress stimuli, such as cytokines, ultraviolet irradiation, heat shock, and osmotic shock, and are involved in cell differentiation, apoptosis and autophagy.

What does the p38 pathway do?

The p38 pathway is the third major signaling cassettes of the mitogen-activated protein kinase (MAPK) signaling pathway. It functions in the control of apoptosis and the release of cytokines by macrophages and neutrophils.

What does MAPK stand for?

Mitogen-activated protein kinase
Mitogen-activated protein kinase (MAPK) modules containing three sequentially activated protein kinases are key components of a series of vital signal transduction pathways that regulate processes such as cell proliferation, cell differentiation, and cell death in eukaryotes from yeast to humans (Fig.

Is p38 a gene?

There are four genes encoding p38 family members in mammals, with the p38α isoform being the most abundant in the majority of cell types [2]. Various mouse models have demonstrated that p38α is important for cytokine production, inflammatory responses and controlling cell proliferation [2].

What does MAPK Signalling do?

MAPK pathways relay, amplify and integrate signals from a diverse range of stimuli and elicit an appropriate physiological response including cellular proliferation, differentiation, development, inflammatory responses and apoptosis in mammalian cells.

What genes does MAPK activate?

For example, mammalian MAPKs activate members of the Ribosomal S6 kinase (RSK), MAPK-interacting kinase (MNK), MAPK-activated protein kinase (MAPKAPK), and the mitogen- and stress-activated protein kinase (MSK) families [17].

Is p38 a transcription factor?

p38 MAPK mediates the transcriptional response to stress. The other transcription-factor genes listed are color coded and are examples of genes that are upregulated by individual stresses or by two of the stresses (dark blue, osmotic stress; green, anisomycin; purple, TNFα).

How is RAF activated?

RAF activation is initiated by RAS-GTP association with the RAS binding domain (RBD) situated within the N-terminal regulatory region of the kinase. The three functional RAF proteins in humans, A-RAF, B-RAF, and C-RAF (also termed c-Raf-1), are dependent on activation segment phosphorylation for activity Chong et al.