Protein breakdown in cancer cachexia.
Level 5 - mechanism / opinion, no new human data
Narrative review of mechanistic pathways without primary human trial data or systematic search
PubMed 26564688 · doi:10.1016/j.semcdb.2015.11.002
What was done
This narrative review summarizes the cellular mechanisms and regulatory signaling pathways responsible for skeletal muscle wasting in cancer cachexia, focusing specifically on the ubiquitin-proteasome and autophagy-lysosome degradation systems.
What was found
The abstract reports no quantitative metrics or numerical findings. It qualitatively describes how tumor growth disrupts muscle homeostasis, stimulating protein degradation and amino acid release (which support liver gluconeogenesis and systemic protein synthesis) via activation of ubiquitin-proteasome and autophagy-lysosome proteolytic pathways.
Why it matters
Understanding the specific proteolytic systems and signaling cascades driving muscle catabolism in cancer cachexia highlights potential molecular targets to prevent or mitigate muscle wasting.
Limits
As a narrative review, it lacks a systematic search methodology, quantitative synthesis, or original experimental data. The abstract does not provide specific clinical outcomes, effect sizes, or trial-validated therapeutic strategies.
Cited by
- supports In cancer cachexia, tumors stimulate protein mobilization from muscles to generate glucose via gluconeogenesis and directly consume glutamine.