ReviewNutrients2023
The Role of the Kynurenine Pathway in the Pathophysiology of Frailty, Sarcopenia, and Osteoporosis.
Review in Nutrients, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
33 citing papers in PubMed, 1 synthesis or guideline pooled it, 43 citations in OpenAlex.
- Exercise-induced adaptations in the kynurenine pathway: implications for health and disease management.Frontiers in sports and active living · 2025Pooled it
- Higher Circulating Kynurenine Levels Linked to Higher Risk of Sarcopenia in Older Adults: A Cohort Study and UK Biobank Analysis.Endocrinology and metabolism (Seoul, Korea) · 2026Article
- Review
- Why Osteosarcopenia Matters: Clinical and Investigative Implications.European journal of clinical investigation · 2026Review
- Association of frailty trajectories with osteoporosis and hip fracture in an older female population.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2026Article
- Tryptophan metabolites 3-hydroxykynurenine (3HK) and 3-hydroxyanthranilic acid (3HAA) increase oxidative stress and impair osteoblastic bone formation.The Journal of biological chemistry · 2026Article
- Metabolic pathways linked to sarcopenia in the Bushehr Elderly Health Program: kynurenine, nicotinamide, B-vitamins, and sulfur amino acids.BMC geriatrics · 2026Article
- Folic Acid Targeting Shared Sepsis-Osteoporosis Pathogenesis: From Computational Discovery to Dynamic Binding Mechanisms.ACS omega · 2026Article
- Exploring gut microbiota mechanisms in frailty induced by 5-hydroxymethylfurfural: evidence from mouse models and Mendelian randomization.Nutrition & metabolism · 2026Article
- Picolinic acid, a tryptophan metabolite, exhibits anabolic effects in muscle cells and improves lifespan and movement in C. elegans.The journals of gerontology. Series A, Biological sciences and medical sciences · 2026Article
- The role of protein quality and amino acid composition in preventing sarcopenia and functional decline in older adults.Frontiers in nutrition · 2026Review
- Roles of gut metabolites on bone mineralization and remodeling: impact of metabolic dysregulation on the gut-immune-bone axis.Frontiers in endocrinology · 2026Review
- Sarcopenia in the Aging Process: Pathophysiological Mechanisms, Clinical Implications, and Emerging Therapeutic Approaches.International journal of molecular sciences · 2025Review
- Sarcosine decreases in sarcopenia and enhances muscle regeneration and adipose thermogenesis by activating anti-inflammatory macrophages.Nature aging · 2025Article
- Glucocorticoid-Mediated Skeletal Muscle Atrophy: Molecular Mechanisms and Potential Therapeutic Targets.International journal of molecular sciences · 2025Review
- Mitochondria-centred metabolomic map of inclusion body myositis: sex-specific alterations in central carbon metabolism.Annals of the rheumatic diseases · 2025Article
- The Mechanism Exploration of Traditional Chinese Medicine's "Different Treatments for Same Disease" Concept in Osteoporosis Therapy: A Serum Metabolomics Study.Journal of cellular and molecular medicine · 2025Article
- Causal relationship between immune cells and osteoporosis based on genetic prediction: a bidirectional two-sample mediated Mendelian randomization analysis.Scientific reports · 2025Article
- Targeted Analysis of Serum and Urinary Metabolites for Early Chronic Kidney Disease.International journal of molecular sciences · 2025Article
- Research Status and Hot Spot Visualization Analysis of Osteoporosis from 2014 to 2025.Journal of multidisciplinary healthcare · 2025Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 1 institution in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Tryptophan is an essential nutrient required to generate vitamin B3 (niacin), which is mainly involved in energy metabolism and DNA production. Alterations in tryptophan metabolism could have significant effects on aging and musculoskeletal health. The kynurenine pathway, essential in tryptophan catabolism, is modulated by inflammatory factors that are increased in older persons, a process known as inflammaging. Osteoporosis, sarcopenia, osteosarcopenia, and frailty have also been linked with chronically increased levels of inflammatory factors. Due to the disruption of the kynurenine pathway by chronic inflammation and/or changes in the gut microbiota, serum levels of toxic metabolites are increased and are associated with the pathophysiology of those conditions. In contrast, anabolic products of this pathway, such as picolinic acid, have demonstrated a positive effect on skeletal muscle and bone. In addition, physical activity can modulate this pathway by promoting the secretion of anabolic kynurenines. According to the evidence collected, kynurenines could have a promising role as biomarkers for osteoporosis sarcopenia, osteosarcopenia, and frailty in older persons. In addition, some of these metabolites could become important targets for developing new pharmacological treatments for these conditions.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.