Biological Role of Anti-aging Protein Klotho.
Level 5 - mechanism / opinion, no new human data
Narrative review describing mechanistic and animal research without new human clinical data.
PubMed 26528423 · doi:10.15280/jlm.2015.5.1.1
What was done
This is a narrative review summarizing literature on the molecular structure, distinct protein forms (membrane, secreted, and intracellular), and physiological mechanisms of the anti-aging protein Klotho.
What was found
The abstract reports no quantitative data or effect sizes. It notes that Klotho deficiency in mice produces accelerated aging phenotypes, whereas overexpression extends lifespan. Membrane-bound Klotho acts as a co-receptor for fibroblast growth factor 23 (FGF23) to regulate phosphate and vitamin D metabolism. Circulating soluble Klotho decreases with age and influences oxidative stress, ion homeostasis, and growth factor signaling. Intracellular Klotho suppresses inflammation-driven cellular senescence.
Why it matters
The review outlines how the different molecular forms of Klotho interface with endocrine, metabolic, and anti-inflammatory pathways implicated in aging and age-related chronic disease.
Limits
The paper is a narrative overview rather than a systematic review or primary clinical study. The abstract presents no numerical data, sample sizes, or human trial outcomes, relying largely on animal models and mechanistic rationale.
Cited by
- supports The protein Klotho has been shown to produce beneficial effects across multiple organ systems in animal models.