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Molecular Insights of MAP4K4 Signaling in Inflammatory and Malignant Diseases
Sunil Kumar Singh1, Ruchi Roy2, Sandeep Kumar1,3
1Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA.
Abstract:
Mitogen-activated protein kinase (MAPK) cascades are crucial in extracellular signal transduction to cellular responses. The classical three-tiered MAPK cascades include signaling through MAP kinase kinase kinase (MAP3K) that activates a MAP kinase kinase (MAP2K), which in turn induces MAPK activation and downstream cellular responses. The upstream activators of MAP3K are often small guanosine-5'-triphosphate (GTP)-binding proteins, but in some pathways, MAP3K can be activated by another kinase, which is known as a MAP kinase kinase kinase kinase (MAP4K). MAP4K4 is one of the widely studied MAP4K members, known to play a significant role in inflammatory, cardiovascular, and malignant diseases. The MAP4K4 signal transduction plays an essential role in cell proliferation, transformation, invasiveness, adhesiveness, inflammation, stress responses, and cell migration. Overexpression of MAP4K4 is frequently reported in many cancers, including glioblastoma, colon, prostate, and pancreatic cancers. Besides its mainstay pro-survival role in various malignancies, MAP4K4 has been implicated in cancer-associated cachexia. In the present review, we discuss the functional role of MAP4K4 in malignant/non-malignant diseases and cancer-associated cachexia and its possible use in targeted therapy.
Insights
Mitogen-activated protein kinase kinase kinase kinase 4 (MAP4K4) signaling is vital in cell functions and diseases. This review explores MAP4K4
Area of Science:
- Cellular signaling pathways
- Molecular biology
- Cancer research
Background:
- Mitogen-activated protein kinase (MAPK) cascades are central to cellular signal transduction.
- MAPK pathways involve sequential kinase activations: MAP3K, MAP2K, and MAPK.
- MAP4K4, a MAP kinase kinase kinase kinase, activates MAP3K and influences cellular processes.
Purpose of the Study:
- To review the multifaceted role of MAP4K4 in diseases.
- To examine MAP4K4's involvement in cancer-associated cachexia.
- To explore MAP4K4 as a potential target for novel therapies.
Main Methods:
- Literature review of studies on MAP4K4 signaling.
- Analysis of MAP4K4's function in various cellular responses.
- Investigation of MAP4K4's role in both malignant and non-malignant conditions.
Main Results:
- MAP4K4 is implicated in cell proliferation, transformation, migration, and inflammation.
- Overexpression of MAP4K4 is common in glioblastoma, colon, prostate, and pancreatic cancers.
- MAP4K4 contributes to cancer-associated cachexia and has a pro-survival role in malignancies.
Conclusions:
- MAP4K4 is a significant mediator in diverse diseases, including cancer.
- Understanding MAP4K4's functions is crucial for developing targeted therapeutic strategies.
- MAP4K4 presents a promising target for future cancer treatments and cachexia management.
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