Collagen Peptides

Body Weight Support Treadmill Training Combined With Sciatic Nerve Electrical Stimulation Ameliorating Motor Function by Enhancing PI3K/Akt Proteins Expression via BDNF/TrkB Signaling Pathway in Rats with Spinal Cord Injury.

Qingqin Xu, Zhen Li, Junhong Su +5 more

To investigate the effects of body weight support treadmill training (BWSTT) and sciatic nerve electrical stimulation (SNES) on motor function recovery in spinal cord injury (SCI) rats and its possible mechanism.

Oral Use of Collagen Supplements in Dermatology.

Vanda Haralović, Ines Sjerobabski Masnec

Collagen is a crucial protein found in bones, muscles, skin, and tendons that provides strength and elasticity to tissues. It is obtained from sources such as marine organisms, cows, pigs, and chickens and is widely used in medicine and cosmetics. Hydrolyzed collagen peptides in the form of powder or liquid are typically used in food supplements. Marine collagen, produced from fish skin, is considered a high-quality source of collagen in food supplements. Research suggests that supplementation of hydrolyzed collagen improves skin hydration, elasticity, and collagen content. UV radiation, aging, and environmental toxins lead to the breakdown of collagen, causing wrinkles, dryness, and reduced elasticity. Excessive sun exposure should be avoided to boost collagen production. However, collagen supplementation has potential risks, including allergies and product quality. Oral supplements based on hydrolyzed collagen show promising results for the health and well-being of the skin, especially when sourced from marine collagen.

Ethosomal Nanocarriers for Hydrophilic Peptide Encapsulation: Formulation Optimization, Stability, and In Vitro Release Performance.

Yasemin Yağan Uzuner, Hakan Sevinç, Zeynep Kanlidere

Hydrolyzed collagen peptides (HCP) are widely used as bioactive ingredients in anti-aging and skin rejuvenation formulations due to their role in supporting skin hydration, elasticity, and extracellular matrix integrity. However, their high hydrophilicity limits effective incorporation into lipid-based systems, and restricts controlled release from formulations.

Therapeutic Efficacy of HPβ-CD-Angiotensin-(1-7) Oral Formulation in Muscle Injury Recovery in Rat.

Nádia Lúcia Totou, Ana Maria Sampaio Rocha, Samara Silva de Moura +8 more

To evaluate the therapeutic effect of oral treatment with HPβ-CD-angiotensin-(1-7) (Ang-(1-7)) on muscle recovery after laceration injury. Wistar rats were divided into four groups: Control (n = 10); HPβ-CD-Ang-(1-7) (n = 10); muscle injury + HPβ-CD (MI + Placebo) (n = 24); and muscle injury + HPβ-CD-Ang-(1-7) (MI + Ang-(1-7)) (n = 24). After 7-21 days of treatment, physical performance, histological features and the expression of pro- and anti-fibrotic genes were evaluated. The MI + Ang-(1-7) group showed improved control of the inflammatory phase and reduced deposition of collagen types I and III compared to MI + Placebo. CTGF gene expression analysis revealed lower levels of pro-fibrotic markers and higher expression of proteins involved in blocking fibrotic pathways. In treadmill tests, MI + Ang-(1-7) animals also showed superior physical performance at all evaluated time points. Oral treatment with Ang-(1-7) is effective in promoting recovery from muscle injuries, particularly fibrotic lesions, while preserving muscle function and enhancing physical performance.

Collagen supplementation and regenerative health: advances in biomarker detection and smart material integration.

Tatjana Ivaskiene, Jonas Viskelis, Paulina Streimikyte +3 more

Collagen, the most abundant structural protein in the human body, plays a key role in skin integrity, tissue repair, and extracellular matrix organization. With increasing consumer and clinical interest, collagen supplementation has expanded rapidly, yet scientific evidence supporting its efficacy in anti-aging and regenerative applications remains inconsistent. This review critically evaluates current evidence on oral collagen supplementation, integrating insights from over 60 clinical studies assessing its effects on skin aging, musculoskeletal health, and hair disorders. Emerging data suggest that hydrolyzed collagen peptides may improve skin elasticity, joint function, and recovery after exercise, particularly when co-supplemented with vitamin C, silica, or resveratrol. Beyond supplementation, recent advances in biosensing and material science have enabled novel approaches to collagen detection and targeted delivery. Electrochemical, optical, and molecularly imprinted polymer (MIP)-based biosensors facilitate real-time monitoring of collagen biomarkers such as CTX-I, MMPs, and hydroxyproline, supporting precision assessment of collagen metabolism. In parallel, collagen-based hydrogels, nanoparticles, and electroresponsive scaffolds have shown promise as biocompatible carriers for controlled drug release and regenerative therapy. Collectively, these developments outline a translational framework connecting collagen supplementation, detection, and delivery. Continued integration of biosensing and smart material technologies may enhance clinical monitoring and therapeutic efficacy, advancing collagen-based interventions toward precision dermatology and regenerative medicine.

The Human-Like Collagen Alpha-1 Type V Peptides Strengthen the Dermal Fiber Network and Improve the Regeneration Ability of Cells.

Ye Hyang Kim, Byung Kuk Kim, Yeon Kyung Nam +5 more

Collagen, a major structural component of the skin, decreases with age and is associated with wrinkles, reduced elasticity, sagging, and dryness. While hydrolyzed or marine-derived collagens are widely used in cosmetics, advances in biotechnology have enabled the development of bio-collagen peptides. However, the role of collagen type V-derived peptides in skin biology remains largely unexplored.

Dileucine-supplemented essential amino acids support whole-body anabolism after resistance exercise and serum-stimulated cell-based anabolism.

Jonathan A Aguilera, Cassidy T Tinline-Goodfellow, Matthew J Lees +9 more

Essential (EAA) and branched chain (BCAA) amino acid ingestion support whole-body anabolism after resistance exercise and can attenuate markers of postexercise myofibrillar protein breakdown (i.e. urinary 3-methylhistidine; 3MH). Leucine is often considered a primary anabolic EAA through its ability to activate the mechanistic target of rapamycin complex 1 (mTORC1) and stimulate muscle protein synthesis. The dipeptide leucine (dileucine) has been shown to more effectively stimulate myofibrillar protein synthesis than leucine in young males at rest. Therefore, we aimed to determine the effect of a dileucine-containing essential amino acid formula (DIEAA; 2 g dileucine, 1 g leucine, 9.15 g total EAA) on the anabolic and catabolic responses following resistance exercise in young recreationally active adults when compared with ingesting branched chain amino acids (BCAA; 3 g leucine, 1.5 g isoleucine, 1.5 g valine) or isonitrogenous (to DIEAA) collagen hydrolysate (COL).

The Sustained Effects of Bioactive Collagen Peptides on Skin Health: A Randomized, Double-Blind, Placebo-Controlled Clinical Study.

Yu Wang, Weixing Zhu, Wenyu Luo +2 more

Collagen is a fundamental component of the skin's extracellular matrix, yet its low oral bioavailability raises questions about its efficacy in improving skin health. Bioactive collagen peptides (BCP), as hydrolyzed forms of collagen, offer enhanced absorption and functionality. However, evidence regarding their sustained effects and the impact of molecular weight distribution is still limited.

Nutritional Supplements for Muscle Hypertrophy: Mechanisms and Morphology-Focused Evidence.

Andreea Maria Mănescu, Simona Ștefania Hangu, Dan Cristian Mănescu

Nutritional supplementation is widely used in resistance training, yet assessment of "hypertrophy" is often confounded by body-composition surrogates. This narrative review, anchored in mechanistic plausibility, integrates trials reporting morphology-direct outcomes (ultrasound/MRI). Across 46 eligible trials, protein/essential amino acids (EAA) showed consistent benefits when daily intake was <1.6 g·kg-1·day-1 or when per-meal leucine provision was <2-3 g; effects plateaued once intakes exceeded ~2.0 g·kg-1·day-1. Creatine monohydrate (3-5 g·day-1, with or without loading) produced measurable increases in muscle thickness or cross-sectional area in interventions lasting ≥8-12 weeks, mediated by enhanced training volume and quality. β-hydroxy-β-methylbutyrate (HMB, 3 g·day-1) demonstrated conditional utility during high training stress or caloric deficit, but was largely neutral in well-fed, resistance-trained cohorts. Adjuncts such as omega-3 fatty acids (1-2 g·day-1), citrulline (6-8 g pre-exercise), and collagen (10-15 g·day-1 plus vitamin C) primarily facilitated training tolerance, recovery, or connective-tissue adaptation, rather than driving hypertrophy directly. A tiered model is proposed: protein/EAA as the foundation, creatine as amplifier, HMB as conditional agent, and adjuncts as facilitators. Methodological heterogeneity, short intervention length, and inconsistent imaging protocols remain limiting factors, underscoring the need for standardized ultrasound/MRI and adequately powered, preregistered trials.

Mechanistic effects of percutaneous needle fasciotomy combined with stretching on early-stage skeletal muscle fibrosis in rats: focus on the TGF-β1/Smad signaling pathway.

Han Zhang, Wanrong Li, Hanyu Zhang +5 more

To investigate the effects of combination combining Percutaneous Needle Fasciotomy (PNF) with stretching(Str) on early-stage skeletal muscle fibrosis in rats, focusing on the transforming growth factor beta-1 (TGF-β1)/Smad signaling pathway.

Can good sleep quality enhance the benefits of oral collagen supplementation in the prevention of skin aging? A brief report.

Ellen M S Xerfan, Maingredy Rodrigues Souza, Anamaria S Facina +2 more

Collagen is essential to skin structure and integrity, and it is continually degraded with aging due to higher oxidative stress. Sleep deprivation accelerates skin aging and reduces collagen production. Good sleep may be a potential adjuvant to the efficacy of oral supplementation with collagenic peptides for the skin.

Nutritional Interventions to Attenuate Quadriceps Muscle Deficits following Anterior Cruciate Ligament Injury and Reconstruction.

Miriam J Smith, Nolan J Hoffman, Argell J San Jose +2 more

Following anterior cruciate ligament (ACL) injury, quadriceps muscle atrophy persists despite rehabilitation, leading to loss of lower limb strength, osteoarthritis, poor knee joint health and reduced quality of life. However, the molecular mechanisms responsible for these deficits in hypertrophic adaptations within the quadriceps muscle following ACL injury and reconstruction are poorly understood. While resistance exercise training stimulates skeletal muscle hypertrophy, attenuation of these hypertrophic pathways can hinder rehabilitation following ACL injury and reconstruction, and ultimately lead to skeletal muscle atrophy that persists beyond ACL reconstruction, similar to disuse atrophy. Numerous studies have documented beneficial roles of nutritional support, including nutritional supplementation, in maintaining and/or increasing muscle mass. There are three main mechanisms by which nutritional supplementation may attenuate muscle atrophy and promote hypertrophy: (1) by directly affecting muscle protein synthetic machinery; (2) indirectly increasing an individual's ability to work harder; and/or (3) directly affecting satellite cell proliferation and differentiation. We propose that nutritional support may enhance rehabilitative responses to exercise training and positively impact molecular machinery underlying muscle hypertrophy. As one of the fastest growing knee injuries worldwide, a better understanding of the potential mechanisms involved in quadriceps muscle deficits following ACL injury and reconstruction, and potential benefits of nutritional support, are required to help restore quadriceps muscle mass and/or strength. This review discusses our current understanding of the molecular mechanisms involved in muscle hypertrophy and disuse atrophy, and how nutritional supplements may leverage these pathways to maximise recovery from ACL injury and reconstruction.

Collagen Peptide Supplementation during Training Does Not Further Increase Connective Tissue Protein Synthesis Rates.

Marius Kirmse, Theo M Lottmann, Nicola R Volk +4 more

Protein supplementation increases postexercise muscle protein synthesis rates and, as such, supports exercise-induced muscle conditioning. Collagen protein has been suggested as the preferred protein source to stimulate muscle connective protein synthesis rates during recovery from exercise. Here we assessed the effects of hydrolyzed collagen peptide supplementation on both myofibrillar as well as muscle connective protein synthesis rates during 1 wk of strenuous resistance exercise training.

Impact of Collagen Peptide Supplementation in Combination with Long-Term Physical Training on Strength, Musculotendinous Remodeling, Functional Recovery, and Body Composition in Healthy Adults: A Systematic Review with Meta-analysis.

Kevin Bischof, Anna Maria Moitzi, Savvas Stafilidis +1 more

Over the past decade, collagen peptide (CP) supplements have received considerable attention in sports nutrition research. These supplements have shown promising results in improving personal health, enhancing athletic performance, and preventing injuries in some but not all studies.

The Effects of Collagen Peptides as a Dietary Supplement on Muscle Damage Recovery and Fatigue Responses: An Integrative Review.

Pedro Augusto Querido Inacio, Yasmin Salgado Mussel Gomes, Ana Julia Nunes de Aguiar +5 more

The oral administration of hydrolyzed collagen peptides is a scientifically validated intervention for enhancing skeletal muscle health and performance. This integrative review consolidates the evidence supporting the use of low molecular weight collagen peptides (2000-3500 daltons) for their superior bioavailability and absorption. Our objective was to review the effects of collagen peptide or hydrolyzed collagen supplementation on muscle damage, recovery, and construction related to physical exercise.

The Efficacy and Safety of CollaSel Pro® Hydrolyzed Collagen Peptide Supplementation without Addons in Improving Skin Health in Adult Females: A Double Blind, Randomized, Placebo-Controlled Clinical Study Using Biophysical and Skin Imaging Techniques.

Devrim Demir-Dora, Umut Ozsoy, Yilmaz Yildirim +8 more

Background: This study aimed to evaluate the efficacy and safety of oral hydrolyzed collagen peptide (HCP) in healthy females by assessing the skin parameters via biophysical and skin imaging techniques. Methods: 112 females were randomly assigned to receive either HCP (n = 57; 10 g CollaSel Pro®) or placebo (n = 55; 10 g maltodextrin) daily for eight weeks. The contribution of HCP to skin elasticity, hydration, and roughness was investigated against a placebo, while the facial soft tissue sagging (RMS) and safety data were also recorded. Results: HCP was associated with significant improvements in skin elasticity (p = 0.009), skin hydration (p ranged from 0.003 to <0.001), and skin roughness (p ranged from 0.002 to <0.001). In the HCP vs. the placebo group, week eight values for skin elasticity (43.0 (7.4) vs. 40.3 (3.3) mPa, p = 0.017), skin hydration (65.8 (18.9) vs. 53.1 (14.9) g/m3, p < 0.001) and skin roughness (40.2 (20.4) vs. 24.9 (20.9) g/m3, p < 0.001) were significantly higher. In the HCP group, week 8 RMS values were significantly lower than baseline values (1.02 (0.21) vs. 1.10 (0.21) mm, p = 0.012). Conclusions: CollaSel Pro® HCP can be considered a well-tolerated, safe product that effectively improves dermal health and the appearance of sagging and ameliorates the signs of the aging process.

Reduction in systemic muscle stress markers after exercise-induced muscle damage following concurrent training and supplementation with specific collagen peptides - a randomized controlled trial.

Kevin Bischof, Savvas Stafilidis, Larissa Bundschuh +3 more

Collagen peptide supplementation in conjunction with exercise has been shown to improve structural and functional adaptations of both muscles and the extracellular matrix. This study aimed to explore whether specific collagen peptide (SCP) supplementation combined with a concurrent training intervention can improve muscular stress after exercise-induced muscle damage, verified by reliable blood markers.

Mustn1 is a smooth muscle cell-secreted microprotein that modulates skeletal muscle extracellular matrix composition.

Serge Ducommun, Paulo R Jannig, Igor Cervenka +19 more

Skeletal muscle plasticity and remodeling are critical for adapting tissue function to use, disuse, and regeneration. The aim of this study was to identify genes and molecular pathways that regulate the transition from atrophy to compensatory hypertrophy or recovery from injury. Here, we have used a mouse model of hindlimb unloading and reloading, which causes skeletal muscle atrophy, and compensatory regeneration and hypertrophy, respectively.

Partly Substituting Whey for Collagen Peptide Supplementation Improves Neither Indices of Muscle Damage Nor Recovery of Functional Capacity During Eccentric Exercise Training in Fit Males.

Ruben Robberechts, Chiel Poffé, Noémie Ampe +2 more

Previous studies showed that collagen peptide supplementation along with resistance exercise enhance muscular recovery and function. Yet, the efficacy of collagen peptide supplementation in addition to standard nutritional practices in athletes remains unclear. Therefore, the objective of the study was to compare the effects of combined collagen peptide (20 g) and whey protein (25 g) supplementation with a similar daily protein dose (45 g) of whey protein alone on indices of muscle damage and recovery of muscular performance during eccentric exercise training. Young fit males participated in a 3-week training period involving unilateral eccentric exercises for the knee extensors. According to a double-blind, randomized, parallel-group design, before and after training, they received either whey protein (n = 11) or whey protein + collagen peptides (n = 11). Forty-eight hours after the first training session, maximal voluntary isometric and dynamic contraction of the knee extensors were transiently impaired by ∼10% (Ptime < .001) in whey protein and whey protein + collagen peptides, while creatine kinase levels were doubled in both groups (Ptime < .01). Furthermore, the training intervention improved countermovement jump performance and maximal voluntary dynamic contraction by respectively 8% and 10% (Ptime < .01) and increased serum procollagen type 1N-terminal peptide concentration by 10% (Ptime < .01). However, no differences were found for any of the outcomes between whey and whey protein + collagen peptides. In conclusion, substituting a portion of whey protein for collagen peptide, within a similar total protein dose, improved neither indices of eccentric muscle damage nor functional outcomes during eccentric training.

Influence of specific collagen peptides and 12-week concurrent training on recovery-related biomechanical characteristics following exercise-induced muscle damage-A randomized controlled trial.

Kevin Bischof, Savvas Stafilidis, Larissa Bundschuh +3 more

It has been shown that short-term ingestion of collagen peptides improves markers related to muscular recovery following exercise-induced muscle damage. The objective of the present study was to investigate whether and to what extent a longer-term specific collagen peptide (SCP) supplementation combined with a training intervention influences recovery markers following eccentric exercise-induced muscle damage.

Oral supplementation with fish cartilage hydrolysate in an adult population suffering from knee pain and function discomfort: results from an innovative approach combining an exploratory clinical study and an ex vivo clinical investigation.

Henrotin Yves, Julie Herman, Melanie Uebelhoer +10 more

Aging is frequently associated with impairments of the musculoskeletal system and many elderly people experience joint discomfort or pain which might reduce their ability to move and consequently alter their quality of life. A beneficial effect of fish cartilage hydrolysate (FCH) on pain and joint function has recently been shown in an ACLT/pMMx osteoarthritis rat model.

Tolerability and efficacy assessment of an oral collagen supplement for the improvement of biophysical and ultrasonographic parameters of skin in middle eastern consumers.

Aniseh Samadi, Maryam Movaffaghi, Faegheh Kazemi +3 more

Topical skin care products often do not reach the deeper layers of the skin, and oral hydrolyzed collagen is one of the newest and most popular systemic supplementations for skin rejuvenation. However, there are limited information in case of Middle Eastern consumers OBJECTIVE: The purpose of this study was to evaluate the tolerability and efficacy of an oral collagen supplement for improvement of skin elasticity, hydration, and roughness in Middle Eastern consumers.

Dietary collagen peptides alleviate exercise-induced muscle soreness in healthy middle-aged males: a randomized double-blinded crossover clinical trial.

Kumiko Kuwaba, Masashi Kusubata, Yuki Taga +3 more

Post-exercise muscle soreness and fatigue can negatively affect exercise performance. Thus, it is desirable to attenuate muscle soreness and fatigue and promote recovery even for daily exercise habits aimed at maintaining or improving health.

Collagen supplementation in skin and orthopedic diseases: A review of the literature.

Luana Dias Campos, Valfredo de Almeida Santos Junior, Júlia Demuner Pimentel +2 more

Collagen is one of the main components of the extracellular matrix of the dermis and articular cartilage and influences the body's mechanical, organizational, and tissue formation properties. Produced from food industry by-products, it is considered a nutraceutical product widely used as an ingredient or supplement in food, pharmaceutical, and cosmetic industries. This study aimed to conduct a literature review on the scientific evidence regarding the beneficial effects of collagen consumption in the treatment of skin and orthopedic diseases. Literature data have shown that hydrolyzed collagen supplementation promotes skin changes, such as decreased wrinkle formation; increased skin elasticity; increased hydration; increased collagen content, density, and synthesis, which are factors closely associated with aging-related skin damage. Regarding orthopedic changes, collagen supplementation increases bone strength, density, and mass; improves joint stiffness/mobility, and functionality; and reduces pain. These aspects are associated with bone loss due to aging and damage caused by strenuous physical activity. Thus, this review addresses the economic and health potential of this source of amino acids and bioactive peptides extracted from food industry by-products.

Exercise induced meteorin-like protects chondrocytes against inflammation and pyroptosis in osteoarthritis by inhibiting PI3K/Akt/NF-κB and NLRP3/caspase-1/GSDMD signaling.

Jiabao Liu, Shuangshuo Jia, Yue Yang +4 more

The production of metrnl, a novel adipomyokine, is induced upon exercise in adipose tissue and skeletal muscle. In this study, we investigated the anti-inflammatory and antipyroptotic effects of exercise-induced metrnl producted in rats in vitro and in vivo. Forty Sprague-Dawley rats were divided randomly into five groups: control (CG), osteoarthritis (OA) with sedentary lifestyle (OAG), OA with low intensity exercise (OAL), OA with moderate intensity exercise (OAM), and OA with high intensity exercise (OAH). The correlation between the level of metrnl and OA degree was detected using ELISA, X-ray imaging, histology, and immunohistochemistry in vivo. Primary chondrocytes were preincubated with recombinant metrnl before interleukin-1β administration to verify the anti-inflammatory and antipyroptotic effects of metrnl. Western blotting and quantitative reverse transcription (qRT)-PCR were used to evaluate the differences in protein and mRNA expression between groups, respectively. Reactive oxygen species (ROS) assay, immunofluorescence, transmission electron microscopy (TEM), and flow cytometry were used to evaluate morphological changes and pyroptosis in chondrocytes. In the moderate-intensity treadmill exercise group, the severity of OA showed maximum relief and the metrnl levels had the most significant increase. Metrnl exerted its anti-inflammatory effect through the suppression of the PI3K/Akt/NF-κB pathway in IL-1β-induced OA chondrocytes, which was accompanied with the recovery of collagen II expression and the attenuation of MMP13 and ADAMTS5. Moreover, metrnl ameliorated chondrocyte pyroptosis by inhibiting the activation of the nod-like receptor protein-3/caspase-1/gasdermin D cascade. In conclusion, moderate-intensity exercise improves inflammation and pyroptosis by increasing metrnl release, which inhibits the PI3K/Akt/NF-κB and further NLRP3/caspase-1/GSDMD signaling pathways.

Benefits of Circulating Human Metabolites from Fish Cartilage Hydrolysate on Primary Human Dermal Fibroblasts, an Ex Vivo Clinical Investigation for Skin Health Applications.

Fabien Wauquier, Line Boutin-Wittrant, Elodie Bouvret +5 more

Due to its significant exposure to stressful environmental factors, the skin undergoes a high remodeling rate over time, which alters not only its appearance but also its functionality. This alteration of the skin, namely photoaging, is characterized by dryness and a loss of elasticity that mainly originates from the dysregulation of dermal fibroblast activities. In order to overcome such tissue outcome, cosmetic products have evolved toward nutricosmetics, thus promoting beauty from within. Among bio-actives of interest, bio-peptides deriving from plant or animal sources may exert various biological activities beyond their nutritional value. However, studies remain mostly descriptive and the mode of action at the cellular level in clinic remains a concern. In a recent clinical trial, it was showed that supplementation with a fish cartilage hydrolysate (FCH) improved signs of chronological and photoaging-induced skin changes in healthy women. Here, using an original ex vivo clinical approach adapted to nutricosmetic purpose, we further demonstrated that this fish cartilage hydrolysate was absorbed and that the circulating metabolites produced in humans following FCH intake stimulate human dermal fibroblast growth, promote specific hyaluronan production, up-regulate elastin synthesis and inhibit MMP-1 and 3 expression along with the enhancement of TGF-β release. Altogether, these data provide clues on the mechanisms likely contributing to the beneficial impact of FCH on human skin functionality by supporting hydration, elasticity and limiting the expression of catabolic factors involved in photoaging onset.

Collagen peptide supplementation for pain and function: is it effective?

Shiloah A Kviatkovsky, Robert C Hickner, Michael J Ormsbee

Connective tissue injuries are prevalent in active and aging populations, leading to chronic pain and decreased function. Turnover of this tissue is not well understood, especially as it relates to aging and injury. Supplementation of collagen peptides has been shown to improve connective tissue recovery and pain through increased collagen production.

Seahorse Protein Hydrolysate Ameliorates Proinflammatory Mediators and Cartilage Degradation on Posttraumatic Osteoarthritis with an Obesity Rat Model.

Sabri Sudirman, Po-Sheng Tseng, Chun-Kai Chen +2 more

Osteoarthritis (OA) is one of the age-related diseases and is highly present on the knees. Obesity and mechanical injuries as a risk factor of OA are attributed to cartilage disintegration, joint loading, and inflammation. This study is aimed at investigating the effects of seahorse protein hydrolysate (SH) on posttraumatic osteoarthritis in an obesity rat. The OA model was developed by anterior cruciate ligament transection with medial meniscectomy in a high-fat diet- (HFD-) induced obesity rat model. The male Sprague-Dawley rats were fed a HFD for 6 weeks before OA surgery. The OA rats were treated with oral gavage by 4, 8, or 20 mg/kg of body weight of SH for 6 weeks of treatment. The expressions of plasma proinflammatory factors, C-telopeptide of type II collagen, and matrix metalloproteinase- (MMP-) 3 and MMP-13 were reduced by SH treatment. Plasma superoxide dismutase and glutathione peroxidase activities were enhanced by SH. SH also relieved the pain of the knee joint and swelling as well as decreased proteoglycan loss in the knee articular cartilage caused by osteoarthritis. Based on these results, SH suppressed proinflammatory factors and attenuated cartilage degradation and pain in the OA model. Therefore, seahorse protein hydrolysate might be a potential opportunity for improving the development of osteoarthritis.

Effect of a Topical Collagen Tripeptide on Antiaging and Inhibition of Glycation of the Skin: A Pilot Study.

Young In Lee, Sang Gyu Lee, Inhee Jung +4 more

The glycation process has been recognized as one of the critical parameters that accelerate signs of skin aging, especially in skin exposed to environment factors, such as ultraviolet radiation. Although previous studies showed the anti-inflammatory and antiaging properties of the hydrolyzed collagen tripeptide (CTP), its exact mechanism is not fully understood. Therefore, in this study, we sought to investigate the effect of a topical CTP on facial skin. Our group designed a 4 week prospective, single-arm study of 22 Asian women who applied topical CTP. We observed significant improvements in skin wrinkles, elasticity, and density with a reduction in skin accumulation of advanced glycated end products (AGEs) at week 4 without any adverse effects. The in vitro study revealed a preventive effect of the topical CTP on the accumulation of AGEs, denatured collagen production, and reactive oxygen species in dermal fibroblasts. Moreover, treatment with the CTP decreased induction of matrix metalloproteinases while increasing the collagen 1 level. These results suggest that the application of a topical CTP might improve clinical aging phenotypes via the inhibition of glycation and oxidative stress, leading to a delay in cellular aging.

The effects of collagen peptide supplementation on body composition, collagen synthesis, and recovery from joint injury and exercise: a systematic review.

Mishti Khatri, Robert J Naughton, Tom Clifford +2 more

Collagen peptide supplementation (COL), in conjunction with exercise, may be beneficial for the management of degenerative bone and joint disorders. This is likely due to stimulatory effects of COL and exercise on the extracellular matrix of connective tissues, improving structure and load-bearing capabilities. This systematic review aims to evaluate the current literature available on the combined impact of COL and exercise. Following Preferred Reporting Items for Systematic Reviews and Meta-analyses guidelines, a literature search of three electronic databases-PubMed, Web of Science and CINAHL-was conducted in June 2020. Fifteen randomised controlled trials were selected after screening 856 articles. The study populations included 12 studies in recreational athletes, 2 studies in elderly participants and 1 in untrained pre-menopausal women. Study outcomes were categorised into four topics: (i) joint pain and recovery from joint injuries, (ii) body composition, (iii) muscle soreness and recovery from exercise, and (iv) muscle protein synthesis (MPS) and collagen synthesis. The results indicated that COL is most beneficial in improving joint functionality and reducing joint pain. Certain improvements in body composition, strength and muscle recovery were present. Collagen synthesis rates were elevated with 15 g/day COL but did not have a significant impact on MPS when compared to isonitrogenous higher quality protein sources. Exact mechanisms for these adaptations are unclear, with future research using larger sample sizes, elite athletes, female participants and more precise outcome measures such as muscle biopsies and magnetic imagery.