Plant Bioactive Compounds Target Core Molecular Pathways to Combat Aging Processes

An editorial collection published in Frontiers in Nutrition brings together five studies examining how plant-derived bioactive compounds target molecular mechanisms underlying biological aging and age-related diseases. Aging represents a multisystem biological process driven by oxidative stress, mitochondrial dysfunction, impaired proteostasis, chronic inflammation, and metabolic dysregulation. With demographic projections indicating that the global population aged 60 years and older is expected to exceed two billion by 2050, identifying safe, effective, and translatable nutritional interventions has emerged as an urgent public-health priority. To address this challenge, the research topic compiles findings spanning green extraction platforms, phytochemical profiling, cellular mechanism discovery, disease-specific applications, and population-based evidence. The evaluated food-derived bioactive compounds encompass flavonoids, proanthocyanidins, iridoids, lignans, phytosterols, and triterpenoid saponins, all assessed for their potential utility in extending healthspan and delaying or preventing age-associated chronic disorders.

Investigating whole-organism longevity, Zhang and colleagues evaluated the anti-aging properties of EULE in the nematode Caenorhabditis elegans to assess its overall effects on lifespan and healthspan while elucidating the underlying molecular mechanisms. The researchers determined that EULE was rich in diverse bioactive compounds, specifically flavonoids, iridoids, and lignans. Dietary supplementation with EULE extended the lifespan of Caenorhabditis elegans and produced measurable improvements in healthspan parameters, notably including the attenuation of age-related muscle deterioration, the preservation of intestinal barrier integrity, and the restoration of mitochondrial homeostasis. Subsequent transcriptomic analysis and experimental validation identified mitogen-activated protein kinase signaling pathways as central mediators of these physiological benefits, with findings specifically demonstrating that the pmk-1/p38 MAPK pathway functions as a primary driver of anti-aging effects within this experimental nematode model.

Focusing on cellular hepatocyte senescence, He and colleagues developed an advanced green extraction platform designed to isolate proanthocyanidins from lotus peel using natural deep eutectic solvents. Utilizing ultrasound-assisted conditions optimized through response surface methodology, the investigators established that a natural deep eutectic solvent composed of glycerol and betaine in a one-to-one ratio achieved a higher proanthocyanidin extraction yield than conventional extraction with seventy percent ethanol. In vitro standardized gastrointestinal digestion assays subsequently revealed distinct release kinetics and gastrointestinal stability profiles among procyanidins B2, B3, and B4. Notably, procyanidin B4 retained 55.32 percent of its initial concentration following four hours of simulated intestinal digestion, while also demonstrating the strongest anti-senescence activity among all evaluated treatments in an experimental tert-butyl hydroperoxide-induced cellular senescence model.

Addressing cellular photoaging, another study in the collection applied network pharmacology, least absolute shrinkage and selection operator machine learning, and experimental validation to dissect the protective actions of medicinal-edible black soybean. Computational screening of sixty-three overlapping targets identified heat shock protein 90 alpha family class A member 1 (HSP90AA1) and B-cell lymphoma 2 (BCL2) as core network nodes. Molecular docking simulations demonstrated high-affinity binding between the phytosterol beta-sitosterol and HSP90AA1 specifically via isoleucine residue 214 in the protein’s client-binding region. In cultured human skin fibroblasts subjected to ultraviolet A irradiation, administration of beta-sitosterol upregulated HSP90AA1 expression, stabilized BCL2 and p53, and significantly decreased senescence-associated beta-galactosidase positivity. Furthermore, treatment elevated the activities of essential antioxidant enzymes, including superoxide dismutase, glutathione peroxidase, and catalase, while simultaneously decreasing levels of malondialdehyde. Genetic or chemical inhibition of HSP90AA1 abolished these beneficial outcomes, confirming an essential functional role for the HSP90AA1-p53-BCL2 regulatory axis in counteracting cellular photoaging.

Expanding the scope to disease-targeted applications and human populations, the research collection highlighted potential therapies involving Gynostemma pentaphyllum for age-related macular degeneration alongside broader epidemiological analyses of dietary habits. In an observational investigation assessing hospital cohorts and participants from the National Health and Nutrition Examination Survey, berry consumption was significantly associated with lower odds of frailty following multivariable adjustment. Detailed intake stratifications within NHANES revealed statistically significant inverse associations specifically among individuals consuming 37 to 74 grams per day and 74 to 158 grams per day, though the findings indicated that such associations did not persist across all higher intake categories. A mediation analysis examining six circulating blood biomarkers established that glycated hemoglobin (HbA1c) was significantly associated with berry intake and frailty status. These findings support the concept that glycemic regulation, operating alongside serum lipids, albumin, creatinine, uric acid, and triglycerides, plays a pivotal role in linking consumption of bioactive-rich fruits with frailty prevention.

Collectively, the editorial synthesizes several overarching cross-cutting themes that unite current investigations into plant-derived longevity compounds. First, structural and chemical diversity is critical, with diverse classes such as flavonoids, proanthocyanidins, isoflavones, lignans, beta-sitosterol, and gypenosides acting through distinct yet complementary and overlapping biological networks. Second, cellular stress-response and redox pathways feature prominently across models, most notably Nrf2/Keap1/ARE signaling, the pmk-1/p38 MAPK pathway, mitochondrial quality control systems, and protein homeostasis coordinated by HSP90AA1. Third, modern phytochemical research increasingly relies on the integration of complementary methodologies, combining natural deep eutectic solvent green extraction with high-resolution mass spectrometry, transcriptomics, network pharmacology, and machine learning to accelerate phytochemical characterization and target discovery across diverse experimental systems ranging from invertebrate and cell models to clinical cohorts.

Despite these promising biological observations, the editorial authors emphasized critical limitations regarding the present body of evidence, noting that findings remain largely confined to invertebrate organisms such as Caenorhabditis elegans, cultured cell lines including HepG2 hepatocytes and human skin fibroblasts, or observational epidemiological surveys. To successfully translate these preclinical insights into validated clinical interventions, the authors concluded that substantial additional research is essential. Future investigations must focus on establishing standardized botanical extracts, defining precise dose-response relationships, determining human pharmacokinetic profiles, characterizing gut microbiome-mediated transformations, and exploring potential sex-specific physiological effects, all of which must ultimately be corroborated through rigorous randomized controlled clinical trials.

Subject of Research: Molecular mechanisms of dietary phytochemicals in aging and age-related diseases

Article Title: Editorial: Phytochemicals: molecular mechanisms for anti-aging and aging-related diseases

Article References: Lv, C., Konsue, N., & Qin, S. (2026). Editorial: Phytochemicals: molecular mechanisms for anti-aging and aging-related diseases. Frontiers in Nutrition, 13, Article 2011625. https://doi.org/10.3389/fnut.2026.2011625

Image Credits: AI Generated

DOI: 10.3389/fnut.2026.2011625

Keywords: phytochemicals, aging mechanisms, oxidative stress, mitochondrial homeostasis, proanthocyanidins, beta-sitosterol, frailty, nutrition research, Editorial, molecular, mechanisms, anti-aging