AI Article Synopsis
- The p38 pathway is a signaling mechanism that helps organisms respond to stress, but its detailed workings are still not fully understood.
- This study highlights the role of p38b, along with p38a and p38c, in helping Drosophila (fruit flies) cope with oxidative stress.
- It also identifies MK2, activated by p38, as a key player in managing oxidative stress, and reveals IscU as a new substrate for MK2, linking the p38 pathway with mitochondrial iron-sulfur clusters.
Article Abstract
The p38 pathway is an evolutionarily conserved signaling pathway that responds to a variety of stresses. However, the underlying mechanisms are largely unknown. In the present study, we demonstrate that p38b is a major p38 MAPK involved in the regulation of oxidative stress tolerance in addition to p38a and p38c in Drosophila. We further show the importance of MK2 as a p38-activated downstream kinase in resistance to oxidative stresses. Furthermore, we identified the iron-sulfur cluster scaffold protein IscU as a new substrate of MK2 both in Drosophila cells and in mammalian cells. These results imply a new mechanistic connection between the p38 pathway and mitochondria iron-sulfur clusters.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4231663 | PMC |
| http://dx.doi.org/10.1074/jbc.M114.589093 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Proinflammatory cytokine-induced matrix metalloproteinase-9 expression in temporomandibular joint osteoarthritis is regulated by multiple intracellular mitogen-activated protein kinase pathways.
J Oral Biosci
January 2025
Division of Cellular Biosignal Sciences, Department of Biochemistry, Iwate Medical University, Yahaba, Iwate, 028-3694, Japan. Electronic address:
Objectives: Temporomandibular joint (TMJ) osteoarthritis (OA) is an inflammatory disease that involves periarthritis of the TMJ and destruction of cartilage tissue in the mandibular condyle. However, the role of proinflammatory cytokines in the expression levels of matrix metalloproteinase (MMP) remains inconclusive. Thus, in this study, we aimed to investigate the effect of proinflammatory cytokines on the expression of MMPs.
View Article and Find Full Text PDFArsenite-induced liver apoptosis via oxidative stress and the MAPK signaling pathway in marine medaka.
Aquat Toxicol
December 2024
Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; Sanya Institute of Ocean Eco-Environmental Engineering, Sanya 572025, China. Electronic address:
Arsenic (As) is widely recognized for its hazards to aquatic organisms; however, its toxicological impacts on apoptosis in marine fish remain inadequately explored. This study investigated the effects of in vivo dietary exposure to 50 or 500 mg/kg AsIII (as NaAsO) over 28 days in marine medaka, alongside in vitro exposure to 50-750 μg/L AsIII for 48 h in a hepatic cell line derived from marine medaka, to elucidate the toxicity and underlying molecular mechanisms. In vivo, As significantly accumulated in liver tissue (1.
View Article and Find Full Text PDFKaempferol attenuates experimental autoimmune neuritis through TNFR1/JNK/p38 signaling pathway inhibition.
Int Immunopharmacol
January 2025
Institute of Medical Sciences, General Hospital of Ningxia Medical University, Yinchuan 750004, China; Diagnosis and Treatment Engineering Technology Research Center of Nervous System Diseases of Ningxia, Yinchuan 750004, China; Neurology Center, General Hospital of Ningxia Medical University, Yinchuan 750004, China. Electronic address:
Kaempferol (Kae) is a flavonoid that has antioxidant, anti-inflammatory and neuroprotective effects. In recent years, there have been increasing reports on viral infection-induced Guillain-Barré syndrome (GBS) with high rates of disability and fatality. Therefore, in order to search for effective peripheral nerve injury repair drugs, we used rats with experimental autoimmune neuritis (EAN) as the typical animal model for GBS, and implemented Kae treatment intervention on EAN rats.
View Article and Find Full Text PDFBasic Science and Pathogenesis.
Alzheimers Dement
December 2024
Georgia Institute of Technology, Atlanta, GA, USA.
Background: Mitogen activated protein kinase (MAPK) signaling is a critical regulator of microglial phenotype, including phagocytic function, cytokine expression, and motility, among others. Importantly, both canonical and non-canonical MAPK signaling is directly activated by RTKs, including Interestingly, CSF1R, is activated by two agonists, CSF1 and IL-34, which have been shown to activate the receptor in different ways that can lead to However, little is known about how the affect microglial MAPK signaling, and whether their effects are dependent on disease state/Aβ exposure. In this study, we hypothesized that IL-34 and CSF-1 elicit distinct patterns of MAPK signaling activation in microglia and MAPK activation would be dependent on whether the cells were exposed to Aβ.
View Article and Find Full Text PDFThe Effect of Clostridium butyricum-Derived Lipoteichoic Acid on Lipopolysaccharide-Stimulated Porcine Intestinal Epithelial Cells.
Vet Med Sci
January 2025
State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Agro-Product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, China.
Background: Clostridium butyricum is a probiotic widely used in animal husbandry, and there is evidence to suggest that it can alleviate intestinal inflammation in pigs and may be related to its lipoteichoic acid (LTA), but the mechanism is still unclear.
Objective: This study aimed to determine the regulatory effect and potential mechanism of C. butyricum LTA on LPS-stimulated inflammation in intestinal porcine epithelial line-J2 (IPEC-J2).
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!