Methotrexate alleviates chronic inflammation in a Drosophila model

Area of Science:

• Oncology
• Immunology
• Metabolism

Background:

• Cancer growth signals and immune responses often arise from the same cellular compartments.
• The innate immune system's recognition of tumorigenesis at a molecular level is not fully understood.
• Chronic inflammation can promote cancer by disrupting metabolic signaling and altering nutrient supply.

Purpose of the Study:

• To investigate the link between immune signaling, fat metabolism, and pseudotumor formation using Drosophila.
• To examine the effects of methotrexate on these processes in larvae with a hyperactive Toll/NF-κB pathway.

Main Methods:

• Utilized Drosophila larvae with a hyperactive Toll/NF-κB pathway.
• Administered the chemical intervention methotrexate.
• Employed genetic rescue of Ubc9-/- mutants by introducing a wild-type copy of Cactus.

Main Results:

• Both methotrexate and genetic interventions alleviated abnormalities associated with Toll/NF-κB hyperactivity.
• These interventions also mitigated the influence of immune hyperactivity on insulin signaling.
• Demonstrated a connection between immune-metabolic crosstalk and inflammation-driven tumorigenesis.

Conclusions:

• Drug repurposing holds potential for cancer treatment.
• Immune-metabolic crosstalk plays a critical role in rewiring inflammation-driven tumorigenesis.
• Findings provide insights into the molecular mechanisms underlying cancer development.