Mapk Akt Pathway
Mapk Akt Pathway - Related Videos
01:22
PI3K/mTOR/AKT Signaling Pathway
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2023
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a rapamycin-insensitive companion...
08:54
Imaging Spatial Reorganization of a MAPK Signaling Pathway Using the Tobacco Transient Expression System
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Cited by 4 •
2016
At the subcellular level, signaling events are dynamically modulated by developmental and environmental cues. Here we describe a protocol that employs the tobacco transient expression system to monitor dynamic protein-protein interaction and to disclose spatial organization of signal transduction in plant cells.
01:07
MAPK Signaling Cascades
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2023
Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
07:15
Mechanism of Kemeng Fang's Inhibition of Podocyte Apoptosis in Rats with Membranous Nephropathy through the PI3K/AKT Signaling Pathway
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Cited by 3 •
2024
The present protocol describes the establishment of a membranous nephropathy (MN) animal model, and how Kemeng Fang's inhibition reduces MN rat podocyte apoptosis by activating the PI3K/AKT signaling pathway.
07:59
Temporal Quantification of MAPK Induced Expression in Single Yeast Cells
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Cited by 6 •
2013
Two complementary methods based on flow cytometry and microscopy are presented which enable the quantification, at the single cell level, of the dynamics of gene expression induced by the activation of a MAPK pathway in yeast.
FAQs
A growth factor receptor can transmit an extracellular cue into two coordinated intracellular routes: Ras, Raf, MEK, and ERK form the MAPK cascade, while receptor signaling can also stimulate PI3K. This parallel engagement allows one cue to influence proliferation and differentiation through MAPK-related signaling while also affecting survival and metabolism through PI3K-AKT signaling.
Cross-talk and feedback prevent the pathway from behaving as two isolated chains. Signals in one branch can influence the strength or persistence of the other, allowing cells to tune responses rather than simply switch them on. This integrated control helps determine whether incoming cues favor growth, survival, proliferation, metabolism, or differentiation.
PIP3 serves as a membrane-localizing signal generated by PI3K. Its production recruits AKT to the membrane, positioning AKT for phosphorylation and subsequent signaling. Downstream influence through targets such as mTOR connects this membrane-associated activation step with broader control of cellular behavior, making PI3K, PIP3, and AKT important points for pathway interpretation.
The MAPK arm proceeds through Ras, Raf, MEK, and ERK, whereas the PI3K-AKT arm uses PI3K-generated PIP3 to recruit AKT and can signal through mTOR. Their outputs overlap through cross-talk, but considering the branches separately helps relate signaling to differentiation and proliferation versus survival and metabolism.
Mapping identifies how extracellular receptor signals move through the Ras-Raf-MEK-ERK and PI3K-PIP3-AKT routes, including their cross-talk and feedback. That systems view can support biomarker development by linking pathway activity patterns with disease biology. It also provides a framework for comparing signaling states when studying abnormal cellular behavior.
Because dysregulation may occur in either branch or in their interactions, pathway analysis helps frame treatment around the signaling network rather than a single isolated component. Examining MAPK- and AKT-related activity can guide investigation of targeted strategies and may help explain why altered signaling is associated with therapy resistance.
The pathway regulates cellular decisions that extend beyond tumor growth. When its control is disrupted, the resulting signaling imbalance can contribute to cancer, therapy resistance, metabolic disease, and inflammatory disorders. In medicine, this broad disease relevance makes pathway dysregulation important for connecting molecular signaling changes with clinically meaningful biology.