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Lola regulates adult midgut homeostasis via non-canonical Hippo signaling.

07:00 EST 14th January 2020 | BioPortfolio

Summary of "Lola regulates adult midgut homeostasis via non-canonical Hippo signaling."

Tissue homeostasis and regeneration in the midgut is regulated by a diverse array of signaling pathways including the Hippo pathway. Hippo signaling restricts intestinal stem cell (ISC) proliferation by sequestering the transcription co-factor Yorkie (Yki) in the cytoplasm, a factor required for rapid ISC proliferation under injury-induced regeneration. Nonetheless, the mechanism of Hippo-mediated midgut homeostasis and whether canonical Hippo signaling is involved in ISC basal proliferation are less characterized. Here we identify Lola as a transcription factor acting downstream of Hippo signaling to restrict ISC proliferation in a Yki-independent manner. Not only that Lola interacts with and is stabilized by the Hippo signaling core kinase Warts (Wts), Lola rescues the enhanced ISC proliferation upon Wts depletion via suppressing and expressions. Our findings reveal that Lola is a non-canonical Hippo signaling component in regulating midgut homeostasis, providing insights on the mechanism of tissue maintenance and intestinal function.

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Name: eLife
ISSN: 2050-084X
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Medical and Biotech [MESH] Definitions

A forkhead box transcription factor that is a major target of INSULIN signaling and regulator of metabolic homeostasis in response to OXIDATIVE STRESS. It binds to the insulin RESPONSE ELEMENT (IRE) and the related Daf-16 family binding element (DBE). Its activity is suppressed by insulin and it also regulates OSTEOBLAST proliferation, controls bone mass, and skeletal regulation of GLUCOSE metabolism. It promotes GLUCONEOGENESIS in HEPATOCYTES and regulates gene expression in ADIPOSE TISSUE. It is also an important CELL DEATH regulator. Chromosomal aberrations involving the FOXO1 gene occur in RHABDOMYOSARCOMA.

Wnt proteins are a large family of secreted glycoproteins that play essential roles in EMBRYONIC AND FETAL DEVELOPMENT, and tissue maintenance. They bind to FRIZZLED RECEPTORS and act as PARACRINE PROTEIN FACTORS to initiate a variety of SIGNAL TRANSDUCTION PATHWAYS. The canonical Wnt signaling pathway stabilizes the transcriptional coactivator BETA CATENIN.

A winged-helix transcription factor that regulates GENE expression in metabolic tissues. It plays a role in HOMEOSTASIS of GLUCOSE and controls expression of GLUT2 PROTEIN.

A glycogen synthase kinase-3 type enzyme that functions in ENERGY METABOLISM; EMBRYONIC DEVELOPMENT; and NEUROGENESIS. It is also involved in PROTEIN BIOSYNTHESIS and regulates cell growth and proliferation as a component of the WNT SIGNALING PATHWAY and other signaling pathways. Certain polymorphisms in the GSK3B gene have been associated with PARKINSON DISEASE; ALZHEIMER DISEASE; and BIPOLAR DISORDER.

A proprotein convertase that is essential for CHOLESTEROL homeostasis. It binds to and is required for the lysosomal degradation of the LDL RECEPTOR (LDLR); the VLDL receptor, and the APOLIPOPROTEIN E RECEPTOR. It also regulates neuronal APOPTOSIS.

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