The coupling of translational control and stress responses

Area of Science:

• Molecular Biology
• Cellular Stress Response

Background:

• Protein synthesis via messenger RNA (mRNA) translation is crucial for cellular function.
• Ribosomes, translation factors, and aminoacyl-transfer RNAs coordinate mRNA translation.
• Cellular stresses can inhibit ribosomal synthesis and translation rates, necessitating adaptive mechanisms.

Purpose of the Study:

• To review the integrated stress response (ISR) and nucleolar stress response (NSR) in mammalian cells.
• To elucidate the molecular mechanisms underlying ISR and NSR activation by stressors.
• To explore the physiological and pathological implications of these stress responses.

Main Methods:

• Literature review focusing on emerging findings in ISR and NSR.
• Analysis of molecular mechanisms linking translation suppression to stress adaptation.
• Examination of stress-responsive transcription factor upregulation.

Main Results:

• Stressors activate both ISR and NSR, which are linked to selective upregulation of transcription factors.
• Detailed molecular pathways for ISR and NSR have been delineated.
• These stress responses play significant roles in cellular adaptation and disease.

Conclusions:

• Mammalian cells employ integrated stress responses to reallocate resources during stress.
• The ISR and NSR are key pathways that link translation control to cellular adaptation.
• Understanding ISR and NSR mechanisms is vital for comprehending cellular physiology and pathology.