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Biomarker: PERK (pT981)

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Analyte:

PERK (pT981)

Platform:

Status:

Experienced Running

Biological or Clinical Significance:

PERK is a transmembrane protein kinase of the PEK family resident in the endoplasmic reticulum membrane. The PKR-like ER kinase (PERK) integrates both cell-autonomous and non-autonomous ER stress stimuli to induce ISC proliferation. In addition to responding to cell-intrinsic ER stress, PERK was also specifically activates in ISCs by JAK/Stat signaling in response to ER stress in neighboring cells. The activation of PERK is required for homeostatic regeneration, as well as for acute regenerative responses, yet the chronic engagement of this response became deleterious in aging flies. Accordingly, knocking down PERK in ISCs is sufficient to promote intestinal homeostasis and extend lifespan. These studies highlight the significance of the PERK branch of the unfolded protein response of the ER (UPRER) in intestinal homeostasis and provide a viable strategy to improve organismal health- and lifespan.

References:

“Pancreatic EIF-2α Kinase.” Sdbonline. Gene Brief, n.d. Web. 28 Apr. 2016.

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