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Adipokines, Inflammation, and Metabolic Diseases · Journal article
Experimental & Molecular Medicine · September 8, 2026
Encouraging direction, but not yet definitive.
N-TSP1, a circulating fragment induced by exercise and cold exposure, improved muscle strength, energy expenditure, insulin resistance, and hepatic steatosis in obese and aged mice and correlated positively with muscle mass and physical performance in humans. This is a mechanistic candidate factor study without controlled human efficacy data or reported effect sizes in the human cohort.
Mechanistic experimental study in mouse models with human observational correlation. High-fat-diet-induced obese mice, aged mice, and humans; no eligibility criteria, setting, or human cohort description provided. Intervention: N-TSP1 (N-terminal thrombospondin-1) administration in mice; no intervention in human cohort. Compared with: Control (untreated) mice; no comparator in human observational analysis.
N-TSP1 administration enhanced muscle strength in high-fat-diet-induced obese mice N-TSP1 increased energy expenditure and attenuated insulin resistance and hepatic steatosis in obese mice N-TSP1 increased mitochondrial respiration and oxidative metabolism in skeletal muscle
Safety was not reported in the material analysed. Check the source before drawing any conclusion about harm.
While suggestive of a role for N-TSP1 in metabolic and functional adaptation, the lack of controlled human trials and reported effect sizes prevents clinical application guidance. Further human studies with adequate sample sizes and hard endpoints are needed before therapeutic translation.
A mechanistic study combining mouse models and human correlation data showing N-TSP1 enhances muscle function and metabolic markers, but lacks controlled human trials and relies on surrogate endpoints and observational human data.
As stated by the source record.
While suggestive of a role for N-TSP1 in metabolic and functional adaptation, the lack of controlled human trials and reported effect sizes prevents clinical application guidance. Further human studies with adequate sample sizes and hard endpoints are needed before therapeutic translation.
Graded across the dimensions that decide whether you should act, each from what the source actually supports. There is no single score, and where a dimension was not assessed it says so.
What is missing. This record has no reported figures. That is a gap in the analysis, not a judgement about the study.
Exercise and cold exposure elicit partly overlapping metabolic adaptations through distinct mechanisms. Here, we sought to identify circulating factors shared by these stimuli. We found that exercise and cold exposure upregulated thrombospondin-1 (TSP1) expression in skeletal muscle and brown adipose tissue (BAT) and induced the release of its N-terminal fragment (N-TSP1). In high-fat-diet-induced obese mice, N-TSP1 administration enhanced muscle strength, increased energy expenditure and attenuated insulin resistance and hepatic steatosis. N-TSP1 also increased mitochondrial respiration and oxidative metabolism in skeletal muscle and stimulated thermogenic marker gene expression in brown adipocytes. In aged mice, N-TSP1 administration significantly improved physical performance and was associated with tissue-specific metabolic remodelling. In humans, plasma N-TSP1 levels correlated positively with muscle mass and physical performance. Together, these findings support a role for N-TSP1 as an exercise- and cold-responsive circulating factor that modulates skeletal muscle function and tissue-specific metabolic adaptation, with potential relevance to obesity- and age-related functional decline.
Taken from the source record, never inferred. Follow any of these and new work involving them reaches your briefing.