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Schulze C, Schunck M, Zdzieblik D, Oesser S. Impact of Specific Bioactive Collagen Peptides on Joint Discomforts in the Lower Extremity during Daily Activities: A Randomized Controlled Trial. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2024; 21:687. [PMID: 38928934 PMCID: PMC11203623 DOI: 10.3390/ijerph21060687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 05/23/2024] [Accepted: 05/25/2024] [Indexed: 06/28/2024]
Abstract
The intake of specific collagen peptides (SCPs) has been shown to decrease activity-related knee pain in young, physically active adults. This trial investigated the effect of a 12-week SCP supplementation in a wider age range of healthy men and women over 18 years with functional knee and hip pain during daily activities. A total of 182 participants were randomly assigned to receive either 5 g of specific collagen peptides (CP-G) or a placebo (P-G). Pain at rest and during various daily activities were assessed at baseline and after 12 weeks by a physician and participants using a 10-point numeric rating scale (NRS). The intake of 5 g SCP over 12 weeks significantly reduced pain at rest (p = 0.018) and during walking (p = 0.032) according to the physician's evaluation. Participants in the CP-G also reported significantly less pain when climbing stairs (p = 0.040) and when kneeling down (p < 0.001) compared to the P-G. Additionally, after 12 weeks, restrictions when squatting were significantly lower in the CP-G compared with the P-G (p = 0.014). The daily intake of 5 g of SCP seems to benefit healthy adults with hip and knee joint discomforts by reducing pain during daily activities.
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Affiliation(s)
- Claas Schulze
- Practice of Surgery Bad Schwartau, Am Kurpark 1, 23611 Bad Schwartau, Germany
| | - Michael Schunck
- CRI, Collagen Research Institute, Schauenburgerstr 116, 24118 Kiel, Germany; (M.S.); (S.O.)
| | - Denise Zdzieblik
- CRI, Collagen Research Institute, Schauenburgerstr 116, 24118 Kiel, Germany; (M.S.); (S.O.)
| | - Steffen Oesser
- CRI, Collagen Research Institute, Schauenburgerstr 116, 24118 Kiel, Germany; (M.S.); (S.O.)
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2
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Devasia S, Joseph JT, P S S, Koizumi S, Clarke L, V T S, Kailas AP, Madhavan S. Management and Amelioration of Knee Joint Osteoarthritis in Adults Using a Novel High-Functional Bovine Collagen Peptide as a Nutritional Therapy: A Double-Blind, Prospective, Multicentric, Randomized, Active and Placebo Controlled, Five-Arm, Clinical Study to Evaluate the Efficacy, Safety, and Tolerability. Cartilage 2024:19476035231221211. [PMID: 38235711 DOI: 10.1177/19476035231221211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2024] Open
Abstract
OBJECTIVE The various functionalities of collagen peptides have generated a large interest in utilizing the bioactive peptides as a nutritional therapy to ameliorate various physiological degenerative conditions. Collagen peptides are observed to reduce the pain and aligned difficulties with respect to osteoarthritis. Here we report the enhanced ameliorating property of novel high-functional "Wellnex" Type J collagen peptides following a double-blind randomized active and placebo-controlled 5-arm clinical trial (n = 100) by using it as a nutritional supplement in subjects with knee joint osteoarthritis in comparison with conventional bovine collagen peptides. The efficacy, safety, and tolerability were also studied. DESIGN Dosages of 2.5, 5.0, and 10.0 g of high-functional Type J bovine collagen peptides, 10.0 g of conventional collagen peptides, and 10.0 g of placebo were given to the 5 groups for a period of 90 days. The Western Ontario McMaster Universities Arthritis Index (WOMAC) score, Pain Scale, Quality of Life (QoL), Physician's Impression of change Score (PICS), serum C-terminal cross-linked telopeptide of type II collagen (CTX-II) levels and Magnetic Resonance Imaging Osteoarthritis Knee Score (MOAKS) parameters were monitored. RESULTS Type J 2.5 g showed significant improvement in WOMAC, QoL, CTX, and MOAKS and observed to be equivalent to conventional collagen peptide 10-g supplementation in terms of efficacy. CONCLUSION The two significant outcomes of the study were that Type J 10.0 g, Type J 5.0 g, Type J 2.5 g and conventional collagen peptides 10.0 g supplementation were observed to be beneficial nutraceutical therapies for knee joint osteoarthritis, and Type J 2.5 g supplementation was equivalent to conventional collagen peptides 10.0-g supplementation in terms of efficacy.
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Affiliation(s)
| | | | | | | | | | - Sriraam V T
- Aurous Health Care Research and Development India Private Limited, Chennai, India
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3
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Puigdellívol Grifell J, Comellas Berenguer C, Steinbacher G, Kranjcec T, Álvarez Díaz P, López Pujol A, Acosta Pereira A, Sánchez Martos M, Fernández Velázquez JR, Esparza Pagán MÁ, Lainez Romo V, Payán Martín L, Giménez Gonzalo J, Carreras Vidal C, Sulbarán JD, Oliveras Riera J. Open, Observational, Single-Arm, Multicenter Study Assessing the Effectiveness of a Dietary Supplement Containing Hydrolyzed Collagen, Chondroitin Sulfate, and Glucosamine for Osteoarthritis Pain Reduction. J Diet Suppl 2024; 21:374-388. [PMID: 38180010 DOI: 10.1080/19390211.2023.2284982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
Osteoarthritis (OA) is an age-related degenerative joint disease with a great impact on patients' well-being and quality of life. This is an observational, open, single-arm multicenter study aimed to evaluate the effectiveness of a nutritional supplement in patients with knee and/or hip OA. A total of 186 patients were recruited from Spanish centers and received a supplement containing hydrolyzed collagen (3000 mg), chondroitin sulfate (800 mg), glucosamine sulfate (700 mg), turmeric extract (250 mg) and devil's claw (150 mg), once daily during 6 months. The primary outcome was the patients' self-perceived pain in the affected joints measured with a visual analogue scale (VAS). Secondary outcome was the patient's functioning, measured with the Lequesne Functional Index and the Western Ontario and McMaster Universities Arthritis Index (WOMAC). Participants showed a significant reduction in self-perceived pain after 3 (mean reduction ± standard deviation, 1.99 ± 1.05) and 6 months (3.57 ± 1.39) of treatment (p < 0.0001 in both comparisons). Lequesne Functional Index score was significantly reduced at 3 months (3.86 ± 2.94) and at 6 months (6.73 ± 4.30) of treatment (p < 0.0001 in both comparisons). The WOMAC index was also significantly reduced after 3 (14.24 ± 10.04) and 6 months (26.43 ± 17.35) of treatment (p < 0.0001 in both comparisons). Significant reductions in WOMAC subdomains (p < 0.0001 in all comparisons) were observed. No severe adverse events were reported during the study. The main results arising from this study show that this nutritional supplementation can improve OA-related symptoms and physical function with a good safety profile in patients with hip and/or knee OA.
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Affiliation(s)
- Jordi Puigdellívol Grifell
- Orthopedic Surgeon-Sports Medicine, Medical Staff FC Barcelona, CIMETIR-Althaia, Manresa, Barcelona, Spain
| | - Carme Comellas Berenguer
- Traumatology and Sports Surgery Department, Centre for Sports Medicine, Traumatology and Rehabilitation, Clinic Sant Josep, Manresa, Barcelona, Spain
| | - Gilbert Steinbacher
- Instituto Cugat Hospital Quirón, Mutualitat Catalana de Futbolistas, Barcelona, Spain
| | - Tomislav Kranjcec
- Rehabilitation Department, Hospital Nostra Senyora de Meritxell, Andorra La Vella, Andorra
| | - Pedro Álvarez Díaz
- Instituto Cugat Hospital Quirón, Mutualitat Catalana de Futbolistas, Barcelona, Spain
| | - Antoni López Pujol
- Hospital Universitari d'Igualada, Consorci Hospitalari de l'Anoia, Igualada, Barcelona, Spain
| | - Asunción Acosta Pereira
- Reumatology Department, Hospital Universitari General de Catalunya, Sant Cugat del Vallès, Barcelona, Spain
| | | | | | | | - Víctor Lainez Romo
- Orthopaedic Surgery and Traumatology Department, Creu Blanca, Barcelona, Spain
| | - Luis Payán Martín
- Orthopaedic Surgery and Traumatology Department, Hospital Sant Esperit, Santa Coloma de Gramanet, Mutualitat atalana de Futbolistes, Barcelona, Spain
| | - Jordi Giménez Gonzalo
- Orthopaedic Surgery and Traumatology Department, Centre Mèdic Quirónsalud Digest, Badalona, Barcelona, Spain
| | | | - José David Sulbarán
- Orthopedic Surgery and Traumatology Department, Hospital Quirónsalud Barcelona, Barcelona, Spain
| | - Jaume Oliveras Riera
- Traumatology and Sports Surgery Department, Centre for Sports Medicine, Traumatology and Rehabilitation, Clinic Sant Josep, Manresa, Barcelona, Spain
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Thomas DT, Prabhakar AJ, Eapen C, Patel VD, Palaniswamy V, Dsouza MC, R S, Kamat YD. Comparison of Single and Combined Treatment with Exercise Therapy and Collagen Supplementation on Early Knee Arthritis among Athletes-A Quasi-Randomized Trial. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:7088. [PMID: 38063519 PMCID: PMC10706409 DOI: 10.3390/ijerph20237088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/05/2023] [Accepted: 10/06/2023] [Indexed: 12/18/2023]
Abstract
Athletic injuries are commonly implicated in the development of early osteoarthritic (EOA) changes in the knee. These changes have a significant impact on athletic performance, and therefore the early detection of EOA is paramount. The objective of the study is to assess the impact of different interventions on individuals with EOA, particularly focusing on recreational athletes. The study aims to evaluate the effectiveness of three treatment groups in improving various aspects related to knee EOA, including pain, range of motion, strength, and function. A study was undertaken with 48 recreational athletes with EOA who were assigned to one of three groups by the referring orthopedic surgeon: collagen (Col), exercise (Ex), or collagen and exercise (ColEx) groups. All the participants received their respective group-based intervention for 12 weeks. Visual analog scale (VAS), knee flexion range of motion (ROM) knee flexors and extensors strength, and KOOS were assessed at baseline, and after 4 weeks, 8 weeks, and 12 weeks of intervention. VAS for activity improved in all treatment groups, with no difference between groups. The between-group analysis for knee ROM revealed a significant difference (p = 0.022) in the Col vs. Ex group at 12 weeks. The knee flexor and extensor strength and the KOOS scores improved considerably in the Ex and the ColEx group (p < 0.05) at 12 weeks. Exercise therapy improved pain, strength and function in subjects with EOA, whereas the association of collagen seems to have accentuated the effects of exercise in bringing about clinical improvements.
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Affiliation(s)
- Dias Tina Thomas
- Department of Physiotherapy, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India; (D.T.T.); (C.E.); (V.D.P.); (V.P.); (M.C.D.); (S.R.)
| | - Ashish John Prabhakar
- Department of Physiotherapy, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India; (D.T.T.); (C.E.); (V.D.P.); (V.P.); (M.C.D.); (S.R.)
| | - Charu Eapen
- Department of Physiotherapy, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India; (D.T.T.); (C.E.); (V.D.P.); (V.P.); (M.C.D.); (S.R.)
| | - Vivek D. Patel
- Department of Physiotherapy, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India; (D.T.T.); (C.E.); (V.D.P.); (V.P.); (M.C.D.); (S.R.)
| | - Vijayakumar Palaniswamy
- Department of Physiotherapy, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India; (D.T.T.); (C.E.); (V.D.P.); (V.P.); (M.C.D.); (S.R.)
| | - Molly Cynthia Dsouza
- Department of Physiotherapy, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India; (D.T.T.); (C.E.); (V.D.P.); (V.P.); (M.C.D.); (S.R.)
| | - Shruthi R
- Department of Physiotherapy, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India; (D.T.T.); (C.E.); (V.D.P.); (V.P.); (M.C.D.); (S.R.)
| | - Yogeesh Dattakumar Kamat
- Adjunct Faculty, Department of Orthopaedics, Kasturba Medical College Hospital, Ambedkar Circle, Mangalore, India;
- Consultant Hip and Knee Surgeon, KMC Hospital, Ambedkar Circle, Mangalore, India
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5
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Buda M, Dlimi S, Parisi M, Benoni A, Bisinella G, Di Fabio S. Subacromial injection of hydrolyzed collagen in the symptomatic treatment of rotator cuff tendinopathy: an observational multicentric prospective study on 71 patients. JSES Int 2023; 7:799-804. [PMID: 37719833 PMCID: PMC10499841 DOI: 10.1016/j.jseint.2023.06.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/19/2023] Open
Abstract
Background The purpose of the present observational multicentric prospective study was to evaluate the efficacy and safety of a new infiltration device (CHondroGrid, Bioteck S.p.A, Arcugnano, Italy) based on hydrolyzed collagen in the treatment of rotator cuff tendinopathy. Methods Seventy-one patients (53.3 ± 11.6 years old) affected by rotator cuff tendinopathy were treated in 2021 with two subacromial injections of CHondroGrid at 13 ± 2.9 days apart. The outcomes measured were the visual analog scale (VAS) score (in movement, during the night, and at rest), the Constant Score, the Simple Shoulder Test, and patient satisfaction. The outcome variables were measured before each injection, at 1 month and at 6 months after the last injection. Results The treatment was significantly effective from the first injection and up to the six-month follow-up. At the last follow-up, the VAS score on movement had improved by 71% (P < .001), while the VAS score at rest and during the night had ameliorated by 91% and 87%, respectively (P < .001). The Constant Score and Simple Shoulder Test improved by 32% and 61%, respectively (P < .001). No adverse events were reported. Conclusions CHondroGrid resulted in a safe and effective treatment in pain relief and for the functional recovery of rotator cuff tendinopathy.
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Affiliation(s)
- Matteo Buda
- Department of Orthopaedics and Trauma Surgery, Ospedali Riuniti Padova Sud, Monselice, (PD), Italy
- Department of Orthopedics and Trauma Surgery Rizzoli-Argenta, Istituto Ortopedico Rizzoli, Argenta, (FE), Italy
| | - Sabri Dlimi
- Department of Orthopaedics and Trauma Surgery, Poliambulatorio Arcella, Padova, Italy
| | - Marco Parisi
- Department of Orthopaedics and Trauma Surgery, San Martino Hospital of Belluno, ULSS1 Dolomiti, Belluno, Italy
| | - Andrea Benoni
- Department of Orthopaedics and Trauma Surgery, University of Verona, Verona, Italy
| | - Gianluca Bisinella
- Department of Orthopaedics and Trauma Surgery, Ospedali Riuniti Padova Sud, Monselice, (PD), Italy
| | - Stefano Di Fabio
- Department of Orthopaedics and Trauma Surgery, San Martino Hospital of Belluno, ULSS1 Dolomiti, Belluno, Italy
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Wilken F, Buschner P, Benignus C, Behr AM, Rieger J, Beckmann J. Pharmatherapeutic Treatment of Osteoarthrosis-Does the Pill against Already Exist? A Narrative Review. J Pers Med 2023; 13:1087. [PMID: 37511701 PMCID: PMC10381646 DOI: 10.3390/jpm13071087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 06/23/2023] [Accepted: 06/26/2023] [Indexed: 07/30/2023] Open
Abstract
The aim of this narrative review is to summarize the current pharmacotherapeutic treatment options for osteoarthritis (OA). Is therapy still mainly symptomatic or does the pill against arthrosis already exist? Causal and non-causal, as well as future therapeutic approaches, are discussed. Various surgical and non-surgical treatment options are available that can help manage symptoms, slow down progression, and improve quality of life. To date, however, therapy is still mainly symptomatic, often using painkilling and anti-inflammatory drugs until the final stage, which is usually joint replacement. These "symptomatic pills against" have side effects and do not alter the progression of OA, which is caused by an imbalance between degenerative and regenerative processes. Next to resolving mechanical issues, the goal must be to gain a better understanding of the cellular and molecular basis of OA. Recently, there has been a lot of interest in cartilage-regenerative medicine and in the current style of treating rheumatoid arthritis, where drug therapy ("the pill against") has been established to slow down or even stop the progression of rheumatoid arthritis and has banned the vast majority of former almost regular severe joint destructions. However, the "causal pill against" OA does not exist so far. First, the early detection of osteoarthritis by means of biomarkers and imaging should therefore gain more focus. Second, future therapeutic approaches have to identify innovative therapeutic approaches influencing inflammatory and metabolic processes. Several pharmacologic, genetic, and even epigenetic attempts are promising, but none have clinically improved causal therapy so far, unfortunately.
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Affiliation(s)
- Frauke Wilken
- Department of Orthopedic Surgery and Traumatology, Hospital Barmherzige Brüder Munich, Romanstr. 93, 80639 München, Germany
| | - Peter Buschner
- Department of Orthopedic Surgery and Traumatology, Hospital Barmherzige Brüder Munich, Romanstr. 93, 80639 München, Germany
| | - Christian Benignus
- Department of Traumatology and Orthopedic Surgery, Hospital Ludwigsburg, Posilipostr. 4, 71640 Ludwigsburg, Germany
| | - Anna-Maria Behr
- Department of Orthopedic Surgery and Traumatology, Hospital Barmherzige Brüder Munich, Romanstr. 93, 80639 München, Germany
| | - Johannes Rieger
- Department of Orthopedic Surgery and Traumatology, Hospital Barmherzige Brüder Munich, Romanstr. 93, 80639 München, Germany
| | - Johannes Beckmann
- Department of Orthopedic Surgery and Traumatology, Hospital Barmherzige Brüder Munich, Romanstr. 93, 80639 München, Germany
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Pu SY, Huang YL, Pu CM, Kang YN, Hoang KD, Chen KH, Chen C. Effects of Oral Collagen for Skin Anti-Aging: A Systematic Review and Meta-Analysis. Nutrients 2023; 15:2080. [PMID: 37432180 DOI: 10.3390/nu15092080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/07/2023] [Accepted: 04/18/2023] [Indexed: 07/12/2023] Open
Abstract
This paper presents a systematic review and meta-analysis of 26 randomized controlled trials (RCTs) involving 1721 patients to assess the effects of hydrolyzed collagen (HC) supplementation on skin hydration and elasticity. The results showed that HC supplementation significantly improved skin hydration (test for overall effect: Z = 4.94, p < 0.00001) and elasticity (test for overall effect: Z = 4.49, p < 0.00001) compared to the placebo group. Subgroup analyses demonstrated that the effects of HC supplementation on skin hydration varied based on the source of collagen and the duration of supplementation. However, there were no significant differences in the effects of different sources (p = 0.21) of collagen or corresponding measurements (p = 0.06) on skin elasticity. The study also identified several biases in the included RCTs. Overall, the findings suggest that HC supplementation can have positive effects on skin health, but further large-scale randomized control trials are necessary to confirm these findings.
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Affiliation(s)
- Szu-Yu Pu
- School of Medicine, College of Medicine, Taipei Medical University, Taipei City 110, Taiwan
| | - Ya-Li Huang
- Department of Public Health, School of Medicine, College of Medicine, Taipei Medical University, Taipei City 11031, Taiwan
| | - Chi-Ming Pu
- Division of Plastic Surgery, Department of Surgery, Cathay General Hospital, Taipei City 106, Taiwan
- School of Medicine, College of Life Science and Medicine, National Tsing Hua University, Hsinchu City 300, Taiwan
| | - Yi-No Kang
- Cochrane Taiwan, Taipei Medical University, Taipei City 110, Taiwan
- Evidence-Based Medicine Center, Wan Fang Hospital, Taipei Medical University, Taipei City 116, Taiwan
- Research Center of Big Data and Meta-Analysis, Wan Fang Hospital, Taipei Medical University, Taipei City 116079, Taiwan
- Institute of Health Policy and Management, College of Public Health, National Taiwan University, Taipei City 100, Taiwan
| | - Khanh Dinh Hoang
- Department of Histopathology, Hai Phong University of Medicine and Pharmacy, Hai Phong 04254, Vietnam
| | - Kee-Hsin Chen
- Cochrane Taiwan, Taipei Medical University, Taipei City 110, Taiwan
- Post-Baccalaureate Program in Nursing, College of Nursing, Taipei Medical University, Taipei City 11031, Taiwan
- Department of Nursing, Wan Fang Hospital, Taipei Medical University, Taipei City 11696, Taiwan
- Research Center in Nursing Clinical Practice, Wan Fang Hospital, Taipei Medical University, Taipei 11696, Taiwan
- Evidence-Based Knowledge Translation Center, Wan Fang Hospital, Taipei Medical University, Taipei City 11696, Taiwan
- School of Medicine, Faculty of Health and Medical Sciences, Taylor's University, Selangor 47500, Malaysia
| | - Chiehfeng Chen
- Department of Public Health, School of Medicine, College of Medicine, Taipei Medical University, Taipei City 11031, Taiwan
- Cochrane Taiwan, Taipei Medical University, Taipei City 110, Taiwan
- Evidence-Based Medicine Center, Wan Fang Hospital, Taipei Medical University, Taipei City 116, Taiwan
- Division of Plastic Surgery, Department of Surgery, Wan Fang Hospital, Taipei Medical University, Taipei City 116, Taiwan
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Tarantino D, Mottola R, Palermi S, Sirico F, Corrado B, Gnasso R. Intra-Articular Collagen Injections for Osteoarthritis: A Narrative Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:4390. [PMID: 36901400 PMCID: PMC10001647 DOI: 10.3390/ijerph20054390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 02/21/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
Osteoarthritis (OA) is the most frequent degenerative progressive joint disease worldwide, with the hand, hip, and knee being the most-affected joints. Actually, no treatment can alter the course of OA, and therapy is directed at reducing pain and improving function. The exogenous administration of collagen has been investigated as a possible symptomatic adjuvant or stand-alone treatment for OA. The aim of this review is to assess if intra-articular collagen administration can be considered as a valid and safe therapeutic option for OA. A search in the main scientific electronic databases to identify the available scientific articles about the effects of intra-articular collagen as an OA treatment was performed. The results of the seven included studies showed that the intra-articular administration of collagen may stimulate chondrocytes to produce hyaline cartilage and hinder the normal inflammatory response leading to fibrous tissue formation, reducing symptoms, and improving functionality. The use of type-I collagen as an intra-articular treatment for knee OA was found not only to be effective, but also safe with negligible side effects. The reported findings are strongly promising, highlighting the need for further high-quality research to confirm the consistency of these findings.
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9
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Newman C, Adriaens E, Virgilio N, Vleminckx S, de Pelsmaeker S, Prawitt J, Silva CIF. Development of a mobile application to monitor the effectiveness of a hydrolyzed cartilage matrix supplement on joint discomfort: a real-life study. JMIR Form Res 2023; 7:e42967. [PMID: 36848035 PMCID: PMC10131938 DOI: 10.2196/42967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 02/17/2023] [Accepted: 02/19/2023] [Indexed: 03/01/2023] Open
Abstract
BACKGROUND Joint discomfort is a widespread and growing problem in active adults. The rising interest in preventative nutrition has increased the demand for supplements reducing joint discomfort. Protocols assessing the effect of a nutritional intervention on health commonly involve a series of face-to-face meetings between participants and study staff that can weigh on resources, participant availabilities and even increase drop-out rates. Digital tools are increasingly added to protocols to facilitate study conduct but fully digitally run studies are still scarce. With the increasing interest in real-life studies, the development of health applications for mobile devices to monitor study outcomes could be of great importance. OBJECTIVE The purpose of the current real-life study was to develop a specific mobile application, Ingredients for LifeTM, to conduct a 100% digital study testing the effectiveness of a hydrolyzed cartilage matrix (HCM) supplement on joint discomfort in a heterogeneous group of healthy, active consumers. METHODS The 'Ingredients for LifeTM ' mobile app using Visual Analog Scale (VAS) was specifically developed to monitor the variation in joint pain after exercise by the study participants. A total of 201 healthy and physically active, adult women and men (18 to 72 years old) with joint pain completed the study over a period of 16 weeks. Participants were randomly allocated to the study groups and did not receive any dietary or lifestyle advice. Each participant indicated one area of joint pain and logged the type and duration of their weekly activities. They received blinded study supplements and took a daily regimen of 1 g of hydrolyzed cartilage matrix (HCM-G) or 1g of maltodextrin (placebo group; P-G) for 12 weeks while weekly logging joint pain scores in the app. This was followed by a 4-week wash out period during which participants continued reporting their joint pain scores (until the end of week 16). RESULTS Joint pain was reduced within 3 weeks of taking a low dosage of HCM (1g/day), regardless of gender, age group and activity intensity when compared to the placebo-group. After stopping supplementation, joint pain scores gradually increased but still remained significantly lower than placebo after 4 weeks of washout. The low dropout rate (< 6% of participants, mainly in the P-G) demonstrates the digital study was well received by the study population. CONCLUSIONS The digital tool allowed to measure a heterogeneous group of active adults in a real-life setting (without any lifestyle intervention), thus promoting inclusivity and diversity. With low dropout rates, it demonstrates that mobile applications can generate qualitative, quantifiable, real-world data showcasing supplement effectiveness. The study confirmed that the oral intake of a low dose (1g/day) of HCM led to a significant reduction of joint pain from 3 weeks after starting supplementation. CLINICALTRIAL
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Yacoub AS, Ammar HO, Ibrahim M, Mansour SM, El Hoffy NM. Artificial intelligence-assisted development of in situ forming nanoparticles for arthritis therapy via intra-articular delivery. Drug Deliv 2022; 29:1423-1436. [PMID: 35532141 PMCID: PMC9128554 DOI: 10.1080/10717544.2022.2069882] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Intra-articular (IA) injection is grasping much interest due to the poor drug bioavailability at the targeted site of action which minimizes the effect of the orally administered moiety. Based on the integral role of non-steroidal anti-inflammatory drugs (NSAIDs) in the treatment of Rheumatoid Arthritis (RA), much effort is exerted to develop novel localized drug delivery systems to increase their bioavailability and minimize their side effects. Artificial intelligence (AI) is acquiring an increasing role in the design of experiments being an effective tool for saving both time and resources. Hence, the aim of this work was to develop, characterize and optimize targeted in-situ forming nano particles (ISNs) for IA delivery of piroxicam using Design® Expert as an AI-based application where a 33 full factorial experimental design was adopted. Morphological investigation, injectability, rheological studies, Fourier Transform Infrared Radiation (FTIR) as well as biological, histopathological, and biochemical examinations were performed to evaluate the optimized-ISNs. The optimized formulation, exhibiting a nano-sized particle size with a dense core, showed significant improvement in the histopathological findings compared to both the oral solution and the placebo. Additionally, the once-a-week IA administration of the optimized-ISNs proved a significant reduction in the protein expression of both STAT-3 and RANKL and the levels of anti-CCP and MCP-1 by almost 54 and 73%, respectively, coupled with a marked decline in the content of IL-17, MMP-3, NF-κB and TNF-α as compared to the positive control. In conclusion, the use of ISNs for intra-articular injection has demonstrated their effectiveness in piroxicam delivery for RA treatment.
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Affiliation(s)
- Ahmed S Yacoub
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Future University in Egypt, Cairo, Egypt
| | - Hussein O Ammar
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Future University in Egypt, Cairo, Egypt
| | - Magdy Ibrahim
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Suzan M Mansour
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt.,Department of Pharmacology, Toxicology and Biochemistry, Faculty of Pharmacy, Future University in Egypt, Cairo, Egypt
| | - Nada M El Hoffy
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Future University in Egypt, Cairo, Egypt
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11
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Iwasaki Y, Nakatogawa M, Shimizu A, Sato Y, Shigemura Y. Comparison of gelatin and low-molecular weight gelatin hydrolysate ingestion on hydroxyproline (Hyp), Pro-Hyp and Hyp-Gly concentrations in human blood. Food Chem 2022; 369:130869. [PMID: 34461513 DOI: 10.1016/j.foodchem.2021.130869] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 08/12/2021] [Accepted: 08/12/2021] [Indexed: 02/01/2023]
Abstract
This study showed that gelatin ingestion significantly increased prolyl-hydroxyproline (Pro-Hyp) levels in plasma of 9 subjects, with maximum concentrations of 15.5 ± 3.0 nmol/mL 2 h post-ingestion. Hydroxyprolyl-glycine (Hyp-Gly) concentrations were significantly increased and reached a maximal level of 2.3 ± 0.5 nmol/mL 1 h post-ingestion of gelatin. A low molecular weight gelatin hydrolysate (LMW-GH) significantly enhanced concentrations of both peptides, while gelatin hydrolysate ingestion did not significantly enhance the maximum concentration and area under the plasma concentration-time curve (AUC) of Hyp-Gly relative to gelatin. The absorption of free Hyp following gelatin ingestion (94.4 ± 16.4 nmol/mL) was significantly lower relative to GH (150.9 ± 15.3 nmol/mL) and LMW-GH (169.1 ± 32.5 nmol/mL). The present study is the first report demonstrating that Hyp-containing peptides are elevated to μM levels in human plasma after gelatin ingestion. These results suggested that gelatin is useful as a functional food as effectively as GH.
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Affiliation(s)
- Yu Iwasaki
- Department of Humanities and Life Sciences, Graduate School of Tokyo Kasei University, 1-18-1 Kaga, Itabashi-ku, Tokyo 173-8602, Japan.
| | - Mizuho Nakatogawa
- Department of Humanities and Life Sciences, Graduate School of Tokyo Kasei University, 1-18-1 Kaga, Itabashi-ku, Tokyo 173-8602, Japan.
| | - Ayaka Shimizu
- Department of Humanities and Life Sciences, Graduate School of Tokyo Kasei University, 1-18-1 Kaga, Itabashi-ku, Tokyo 173-8602, Japan.
| | - Yoshio Sato
- Department of Humanities and Life Sciences, Graduate School of Tokyo Kasei University, 1-18-1 Kaga, Itabashi-ku, Tokyo 173-8602, Japan.
| | - Yasutaka Shigemura
- Department of Humanities and Life Sciences, Graduate School of Tokyo Kasei University, 1-18-1 Kaga, Itabashi-ku, Tokyo 173-8602, Japan.
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12
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Lee YI, Lee SG, Jung I, Suk J, Lee MH, Kim DU, Lee JH. Effect of a Topical Collagen Tripeptide on Antiaging and Inhibition of Glycation of the Skin: A Pilot Study. Int J Mol Sci 2022; 23:ijms23031101. [PMID: 35163025 PMCID: PMC8835374 DOI: 10.3390/ijms23031101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/09/2022] [Accepted: 01/18/2022] [Indexed: 01/05/2023] Open
Abstract
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.
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Affiliation(s)
- Young In Lee
- Department of Dermatology, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul 03722, Korea; (Y.I.L.); (S.G.L.)
- Scar Laser and Plastic Surgery Center, Yonsei Cancer Hospital, Seoul 03722, Korea
| | - Sang Gyu Lee
- Department of Dermatology, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul 03722, Korea; (Y.I.L.); (S.G.L.)
| | - Inhee Jung
- Global Medical Research Center, Seoul 06526, Korea; (I.J.); (J.S.)
| | - Jangmi Suk
- Global Medical Research Center, Seoul 06526, Korea; (I.J.); (J.S.)
| | - Mun-Hoe Lee
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul 05604, Korea; (M.-H.L.); (D.-U.K.)
| | - Do-Un Kim
- Health Food Research and Development, NEWTREE Co., Ltd., Seoul 05604, Korea; (M.-H.L.); (D.-U.K.)
| | - Ju Hee Lee
- Department of Dermatology, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul 03722, Korea; (Y.I.L.); (S.G.L.)
- Scar Laser and Plastic Surgery Center, Yonsei Cancer Hospital, Seoul 03722, Korea
- Correspondence: ; Tel.: +82-2-2228-2080
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13
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Nutraceutical Approach to Chronic Osteoarthritis: From Molecular Research to Clinical Evidence. Int J Mol Sci 2021; 22:ijms222312920. [PMID: 34884724 PMCID: PMC8658017 DOI: 10.3390/ijms222312920] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 11/22/2021] [Accepted: 11/27/2021] [Indexed: 12/30/2022] Open
Abstract
Osteoarthritis (OA) is a degenerative inflammatory condition of the joint cartilage that currently affects approximately 58 million adults in the world. It is characterized by pain, stiffness, and a reduced range of motion with regard to the arthritic joints. These symptoms can cause in the long term a greater risk of overweight/obesity, diabetes mellitus, and falls and fractures. Although the current guidelines for the treatment of OA suggest, as the gold standard for this condition, pharmacological treatment characterized by non-steroidal anti-inflammatory drugs (NSAID), opioids, and cyclooxygenase (COX)-2-specific drugs, a great interest has been applied to nutraceutical supplements, which include a heterogeneous class of molecules with great potential to reduce inflammation, oxidative stress, pain, and joint stiffness and improve cartilage formation. The purpose of this review is to describe the potential application of nutraceuticals in OA, highlighting its molecular mechanisms of actions and data of efficacy and safety (when available).
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Zdzieblik D, Brame J, Oesser S, Gollhofer A, König D. The Influence of Specific Bioactive Collagen Peptides on Knee Joint Discomfort in Young Physically Active Adults: A Randomized Controlled Trial. Nutrients 2021; 13:nu13020523. [PMID: 33562729 PMCID: PMC7915677 DOI: 10.3390/nu13020523] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 01/12/2021] [Accepted: 02/02/2021] [Indexed: 12/22/2022] Open
Abstract
First evidence indicates that the supplementation of specific collagen peptides is associated with a significant reduction in activity-related joint pain in young adults. The purpose of the current investigation was to confirm the efficacy of the same collagen peptides in a comparable study population. In total, 180 active men and women aged between 18 and 30 years with exercise-related knee pain but no diagnosed joint disease completed the trial over a period of 12 weeks. Participants were randomly assigned to the group receiving 5 g of specific collagen peptides (CP-G) or to the placebo group (P-G). For the primary outcome, changes in pain during or after exercise from pre- to post-intervention were assessed by the participants using the Visual Analog Scale (VAS). These changes were additionally evaluated by the examining physician by means of anamnesis and physical examination of the affected knee joint. As secondary outcomes, pain under resting conditions and after 20 squats were compared between the study groups. In addition, the mobility of the knee joint and the use of alternative therapies (e.g., ointments or physiotherapy) were recorded. The supplementation of specific collagen peptides derived from type I collagen with a mean molecular weight of 3 kDa led to a significantly (p = 0.024) higher reduction of exercise-induced knee pain (−21.9 ± 18.3 mm) compared with the placebo group (−15.6 ± 18.5 mm). These findings were consistent with the physician’s evaluation (−23.0 ± 19.2 mm vs. −14.6 ± 17.9 mm, p = 0.003). The decrease in pain under resting conditions and after squats did not significantly differ between the groups, as only a small number of participants suffered from pain under these conditions. Due to the clinically unremarkable baseline values, the mobility of the knee joint did not change significantly after the intervention. In conclusion, the current investigation confirmed that the oral intake of bioactive collagen peptides used in the current investigation led to a statistically significant reduction of activity-related joint pain in young active adults suffering from knee joint discomfort.
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Affiliation(s)
- Denise Zdzieblik
- Department for Nutrition, Institute for Sports and Sports Science, University of Freiburg, Schwarzwaldstr. 175, 79117 Freiburg, Germany; (D.Z.); (A.G.)
| | - Judith Brame
- Department for Nutrition, Institute for Sports and Sports Science, University of Freiburg, Schwarzwaldstr. 175, 79117 Freiburg, Germany; (D.Z.); (A.G.)
- Correspondence: ; Tel.: +49-761-203-54087
| | - Steffen Oesser
- CRI, Collagen Research Institute, Schauenburgerstr 116, 24118 Kiel, Germany;
| | - Albert Gollhofer
- Department for Nutrition, Institute for Sports and Sports Science, University of Freiburg, Schwarzwaldstr. 175, 79117 Freiburg, Germany; (D.Z.); (A.G.)
| | - Daniel König
- Centre of Sports Science, Department for Sports, Nutrition and Health, University of Vienna, Auf der Schmelz 6, Vienna 1150, Austria;
- Faculty of Life Sciences, Department for Sports, Nutrition and Health, University of Vienna, Althanstrasse 14, Vienna 1090, Austria
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15
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Aghamohammadi D, Dolatkhah N, Bakhtiari F, Eslamian F, Hashemian M. Nutraceutical supplements in management of pain and disability in osteoarthritis: a systematic review and meta-analysis of randomized clinical trials. Sci Rep 2020; 10:20892. [PMID: 33262447 PMCID: PMC7708648 DOI: 10.1038/s41598-020-78075-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 11/04/2020] [Indexed: 12/14/2022] Open
Abstract
This study designed to evaluate the effect of nutraceutical supplementation on pain intensity and physical function in patients with knee/hip OA. The MEDLINE, Web of Science, Cochrane Library, Scopus, EMBASE, Google Scholar, Science direct, and ProQuest in addition to SID, Magiran, and Iranmedex were searched up to March 2020. Records (n = 465) were screened via the PICOS criteria: participants were patients with hip or knee OA; intervention was different nutritional supplements; comparator was any comparator; the outcome was pain intensity (Visual analogue scale [VAS]) and physical function (Western Ontario and McMaster Universities Arthritis [WOMAC] index); study type was randomized controlled trials. The random effects model was used to pool the calculated effect sizes. The standardized mean difference (SMD) of the outcome changes was considered as the effect size. The random effects model was used to combine the effect sizes. Heterogeneity between studies was assessed by Cochran's (Q) and I2 statistics. A total of 42 RCTs were involved in the meta-analysis. Nutritional supplementation were found to improve total WOMAC index (SMD = - 0.23, 95% CI - 0.37 to - 0.08), WOMAC pain (SMD = - 0.36, 95% CI - 0.62 to - 0.10) and WOMAC stiffness (SMD = - 0.47, 95% CI - 0.71 to - 0.23) subscales and VAS (SMD = - 0.79, 95% CI - 1.05 to - 0.05). Results of subgroup analysis according to the supplementation duration showed that the pooled effect size in studies with < 10 months, 10-20 months and > 20 months supplementation duration were 0.05, 0.27, and 0.36, respectively for WOMAC total score, 0.14, 0.55 and 0.05, respectively for WOAMC pain subscale, 0.59, 0.47 and 0.41, respectively for WOMAC stiffness subscale, 0.05, 0.57 and 0.53, respectively for WOMAC physical function subscale and 0.65, 0.99 and 0.12, respectively for VAS pain. The result suggested that nutraceutical supplementation of patients with knee/hip OA may lead to an improvement in pain intensity and physical function.
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Affiliation(s)
- Dawood Aghamohammadi
- Department of Anesthesiology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Neda Dolatkhah
- Physical Medicine and Rehabilitation Research Center, Aging Research Institute, Tabriz University of Medical Sciences, Emam Reza Hospital, Golgasht, Azadi Ave., Tabriz, Iran.
| | - Fahimeh Bakhtiari
- Physical Medicine and Rehabilitation Research Center, Aging Research Institute, Tabriz University of Medical Sciences, Emam Reza Hospital, Golgasht, Azadi Ave., Tabriz, Iran
| | - Fariba Eslamian
- Physical Medicine and Rehabilitation Research Center, Aging Research Institute, Tabriz University of Medical Sciences, Emam Reza Hospital, Golgasht, Azadi Ave., Tabriz, Iran
| | - Maryam Hashemian
- Department of Biology, School of Arts and Sciences, Utica College, Utica, USA
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16
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Yao L, Yang P, Luo W, Li S, Wu Y, Cai N, Bi D, Li H, Han Q, Xu X. Macrophage-stimulating activity of European eel (Anguilla anguilla) peptides in RAW264.7 cells mediated via NF-κB and MAPK signaling pathways. Food Funct 2020; 11:10968-10978. [PMID: 33283791 DOI: 10.1039/d0fo02497j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
European eel (Anguilla anguilla) is considered to be a vital commercial fish species. In this study, the effect and molecular mechanism of bioactive peptides from European eel on macrophage-stimulating activity in RAW264.7 cells were investigated. Eel peptide (EP) markedly induced NO and iNOS production and promoted TNF-α and IL-6 secretion in a concentration-dependent manner. Moreover, EP dose-dependently activated NF-κB and MAPK signaling pathways in RAW264.7 cells. In addition, EP was purified using a Sephadex A-25 column and a Bio-Gel P-6 column, and the fraction (Fr-1-1) showing the strongest NO-inducing activity was obtained. Then, the molecular weights of the components in Fr-1-1 were analyzed by LC-MS/MS and found to range from 700 to 1900 Da for the majority of components, which suggested that Fr-1-1 mainly consisted of peptides containing 8-20 amino acid residues. Overall, our results indicated that EP from Anguilla anguilla activated macrophages and could be used as a potential nutraceutical or pharmaceutical.
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Affiliation(s)
- Lijun Yao
- Shenzhen Key Laboratory of Marine Bioresources and Ecology, Guangdong Provincial Key Laboratory for Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518055, PR China.
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17
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Role of Collagen Derivatives in Osteoarthritis and Cartilage Repair: A Systematic Scoping Review With Evidence Mapping. Rheumatol Ther 2020; 7:703-740. [PMID: 33068290 PMCID: PMC7695755 DOI: 10.1007/s40744-020-00240-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 09/23/2020] [Indexed: 12/17/2022] Open
Abstract
Introduction There is currently no disease-modifying drug for osteoarthritis (OA), and some safety concerns have been identified about the leading traditional drugs. Therefore, research efforts have focused on alternatives such as supplementation with collagen derivatives. The objective of this scoping review is to examine the extent, range, and nature of research, and to summarize and disseminate research findings on the effects of collagen derivatives in OA and cartilage repair. The purpose is to identify gaps in the current body of evidence in order to further help progress research in this setting. Methods The databases Medline, Scopus, CENTRAL, TOXLINE, and CDSR were comprehensively searched from inception to search date. After studies selection against eligibility criteria, following recommended methods, data were charted from the retrieved articles and these were subsequently synthesized. Numerical and graphical descriptive statistical methods were used to show trends in publications and geographical distribution of studies. Results The systematic literature search identified a total of 10,834 records. Forty-one published studies were ultimately included in the review, 16 of which were preclinical studies and 25 were clinical studies (including four systematic reviews/meta-analyses). Collagen hydrolysate (CH) and undenatured collagen (UC) were the two types of collagen derivatives studied, with a total of 28 individual studies on CH and nine on UC. More than a third of studies originated from Asia, and most of them have been published after 2008. Oral forms of collagen derivatives were mainly studied; three in vivo preclinical studies and three clinical trials investigated intra-articularly injected CH. In most of the clinical trials, treatment durations varied between 3 and 6 months, with the shortest being 1.4 months and the longest 11 months. All in vivo preclinical studies and clinical trials, regardless of their quality, concluded on beneficial effects of collagen derivatives in OA and cartilage repair, whether used as nutritional supplement or delivered intra-articularly, and whatever the manufacturers of the products, the doses and the outcomes considered in each study. Conclusions Although current evidence shows some potential for the use of CH and UC as an option for management of patients with OA, there is still room for progress in terms of laboratory and clinical research before any definitive conclusion can be made. Harmonization of outcomes in preclinical studies and longer randomized placebo-controlled trials in larger populations with the use of recommended and validated endpoints are warranted before collagen derivatives can be recommended by large scientific societies. Electronic Supplementary Material The online version of this article (10.1007/s40744-020-00240-5) contains supplementary material, which is available to authorized users.
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18
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Volpi P, Zini R, Erschbaumer F, Beggio M, Busilacchi A, Carimati G. Effectiveness of a novel hydrolyzed collagen formulation in treating patients with symptomatic knee osteoarthritis: a multicentric retrospective clinical study. INTERNATIONAL ORTHOPAEDICS 2020; 45:375-380. [PMID: 32447428 DOI: 10.1007/s00264-020-04616-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 05/11/2020] [Indexed: 01/09/2023]
Abstract
PURPOSE Knee osteoarthritis (OA) is a musculoskeletal disorder that may have a heavy impact on the patients' quality of life. Intra-articular collagen injection may be a safe adjuvant. Recently, CHondroGrid (CG), a hydrolyzed (< 3 kDa) bovine collagen injectable formulation, has been placed on the market. The aim of this study was to investigate the safety and performance profile of CG. METHODS Patients affected by Kellgren Lawrence grade 1 to 4 knee OA and BMI < 30 were treated by administering three CG injections of 2 ml (4 mg) each (at 15 days and 45 days from the first one, respectively) and were followed up for six months after the last administration. Clinical records were retrospectively assessed to compare VAS, Lequesne and WOMAC total, pain, stiffness, and physical function scores collected at baseline and 15, 45, and 225 days after the first injection. RESULTS At the last follow-up, 70 patients (37 men and 33 women, aged 57.1 ± 14.5 years) treated with CG showed a 50% reduction in their median Lequesne score, a 50% reduction in their VAS score at rest and moving, and a ≥ 50% reduction for all other scores under consideration. CONCLUSIONS CG may be a safe and effective adjuvant in the treatment of symptomatic knee OA.
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Affiliation(s)
- Piero Volpi
- Humanitas Clinical and Research Center, Via Alessandro Manzoni, 56, 20089 Rozzano, Milan, Italy
| | - Raul Zini
- Maria Cecilia Hospital - Cotignola, Via Madonna di Genova, 1, 48033 Cotignola, Ravenna, Italy
| | - Franz Erschbaumer
- Bressanone/Brixen Hospital, Via Dante, 51, I-39042 Bressanone, Bolzano, Italy
| | - Michelangelo Beggio
- Policlinico San Marco, Via Francesco Zanotto, 40, 30173 Mestre, Venice, Italy
| | - Alberto Busilacchi
- Maria Cecilia Hospital - Cotignola, Via Madonna di Genova, 1, 48033 Cotignola, Ravenna, Italy.
| | - Giulia Carimati
- Humanitas Clinical and Research Center, Via Alessandro Manzoni, 56, 20089 Rozzano, Milan, Italy
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Li Y, Li J, Lin SJ, Yang ZS, Jin HX. Preparation of Antioxidant Peptide by Microwave- Assisted Hydrolysis of Collagen and Its Protective Effect Against H 2O 2-Induced Damage of RAW264.7 Cells. Mar Drugs 2019; 17:md17110642. [PMID: 31739542 PMCID: PMC6891724 DOI: 10.3390/md17110642] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/07/2019] [Accepted: 11/12/2019] [Indexed: 12/23/2022] Open
Abstract
Antioxidant peptides have elicited interest for the versatility of their use in the food and pharmaceutical industry. In the current study, antioxidant peptides were prepared by microwave-assisted alkaline protease hydrolysis of collagen from sea cucumber (Acaudina molpadioides). The results showed that microwave irradiation significantly improved the degree of hydrolysis of collagen and the hydroxyl radical (OH⋅) scavenging activity of hydrolysate. The content and OH⋅ scavenging activity of collagen peptides with molecular weight ≤ 1 kDa (CPS) in the hydrolysate obtained at 250 W increased significantly compared with the non-microwave-assisted control. CPS could scavenge OH⋅ and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical in a dose-dependent manner. The scavenging activity of OH⋅ and DPPH radical was 93.1% and 41.2%, respectively, at CPS concentration of 1 mg/mL. CPS could significantly promote RAW264.7 cell proliferation and reduce the Reactive Oxygen Species (ROS) level of H2O2-induced damage in RAW264.7 cells in a dose-dependent manner. Furthermore, all CPS-treated groups exhibited an increase in superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) and a decrease in malondialdehyde (MDA) level compared with the control. These results showed that CPS could effectively protect RAW264.7 cells from H2O2-induced damage, implying the potential utilization of CPS as a natural antioxidant for food and pharmaceutical applications.
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Affiliation(s)
- Yan Li
- Zhejiang Provincial Engineering Technology Research Center of Marine Biomedical Products; School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, China; (Y.L.); (J.L.); (Z.-S.Y.)
| | - Jie Li
- Zhejiang Provincial Engineering Technology Research Center of Marine Biomedical Products; School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, China; (Y.L.); (J.L.); (Z.-S.Y.)
| | - Sai-Jun Lin
- Hangzhou Institute for Food and Drug Control, Hangzhou 310052, China;
| | - Zui-Su Yang
- Zhejiang Provincial Engineering Technology Research Center of Marine Biomedical Products; School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, China; (Y.L.); (J.L.); (Z.-S.Y.)
| | - Huo-Xi Jin
- Zhejiang Provincial Engineering Technology Research Center of Marine Biomedical Products; School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, China; (Y.L.); (J.L.); (Z.-S.Y.)
- Correspondence: ; Tel.: +86-580-255-2395
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20
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Nomura K, Kimira Y, Osawa Y, Shimizu J, Kataoka-Matsushita A, Mano H. Collagen-derived dipeptide prolyl hydroxyproline directly binds to Foxg1 to change its conformation and inhibit the interaction with Runx2. Biosci Biotechnol Biochem 2019; 83:2027-2033. [PMID: 31322484 DOI: 10.1080/09168451.2019.1642099] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Collagen-derived dipeptide prolyl hydroxyproline (Pro-Hyp) is involved in the proliferation and differentiation of various types of cultured cells. To elucidate the mechanism underlying Pro-Hyp actions during osteoblast differentiation, we hypothesized that proteins binding to Pro-Hyp serve to mediate cellular signaling, affecting Runx2 expression. Recently, we performed the characterization of Foxg1, that it enhances Runx2 expression in the presence of Pro-Hyp. Our findings indicate that Pro-Hyp directly binds to the Foxg1 recombinant protein, which leads to the structural alteration of the Foxg1 protein. In addition, Foxg1 appears to interact with Runx2 in the absence of Pro-Hyp, with Pro-Hyp disrupting the interaction between Foxg1 and Runx2. Collectively, our results indicate that the Pro-Hyp bound Foxg1 alters the structured conformation of Foxg1, resulting in conformational changes that lead to dissociation from Runx2. These novel findings suggest that during osteoblast differentiation, Pro-Hyp mediates Runx2 activity though directly binding to Foxg1 and increases Runx2 expression. Abbreviations: CPT: collagen peptide; GST: Glutathione S-transferase; PAGE: Polyacrylamide gel electrophoresis; PCR: Polymerase chain reaction; prolyl hydroxyproline: Pro-Hyp.
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Affiliation(s)
- Kaho Nomura
- Faculty of Pharmaceutical Sciences, Josai University , Sakado , Japan
| | - Yoshifumi Kimira
- Faculty of Pharmaceutical Sciences, Josai University , Sakado , Japan
| | - Yoshihiro Osawa
- Faculty of Pharmaceutical Sciences, Josai University , Sakado , Japan
| | - Jun Shimizu
- Faculty of Pharmaceutical Sciences, Josai University , Sakado , Japan
| | | | - Hiroshi Mano
- Faculty of Pharmaceutical Sciences, Josai University , Sakado , Japan
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Intra-Articular Injection of Hydrolyzed Collagen to Treat Symptoms of Knee Osteoarthritis. A Functional In Vitro Investigation and a Pilot Retrospective Clinical Study. J Clin Med 2019; 8:jcm8070975. [PMID: 31277508 PMCID: PMC6678364 DOI: 10.3390/jcm8070975] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 06/27/2019] [Accepted: 07/03/2019] [Indexed: 12/19/2022] Open
Abstract
Among all joints affected, knee osteoarthritis has a prevalence of about 10% in men and 13% in women over 60 years old. Knee osteoarthritis has high economic and social costs and may have a devastating impact on patient quality of life. Treatment of symptomatic knee Osteoarthritis may involve oral or topical administration of non-steroidal anti-inflammatory drugs or intra-articular injection of corticosteroids. Recently, a novel injectable collagen formulation (ChondroGrid) consisting of bovine hydrolyzed <3 kDa type I collagen has been developed and is currently available on the market as an injectable medical device. The primary objective of this study was to investigate the in vitro and in vivo effects of ChondroGrid in treating knee osteoarthritis symptoms to assess its safety and performance. Viability and proliferation of ChondroGrid-exposed human chondrocytes derived from five donors were assessed through the Alamar Blue/CyQuant assays. Their expression of MMP1/MMP3 and TIMP1/TIMP3 was then assessed through RT-PCR and that of TGFβ1, IGF-I, and VEGF using ELISA assays. Shape and ECM deposition were assessed using the Bern score after a 28-day ChondroGrid exposure, and collagen deposition was assessed using immunostaining. Records of 20 patients affected by Kellgren Lawrence grade 1 to 4 knee osteoarthritis who received three 4 mg/2 mL ChondroGrid injections 2 weeks apart were then retrospectively assessed to compare VAS, Lequesne, and WOMAC scores collected before and 15, 45, and 225 days after the first injection. ChondroGrid had no effects on the markers under consideration, but induced type-II and inhibited type-I collagen deposition; the Bern score was higher when cells were cultured with ChondroGrid. Patients experienced a 44% Lequesne score and a 55% VAS at moving score reduction. All other scores decreased >70%. ChondroGrid may prompt chondrocytes to produce hyaline cartilage, prevent fibrous tissue formation, and be a safe and effective adjuvant to treat symptomatic knee osteoarthritis.
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Preparation and Evaluation of Peptides with Potential Antioxidant Activity by Microwave Assisted Enzymatic Hydrolysis of Collagen from Sea Cucumber Acaudina Molpadioides Obtained from Zhejiang Province in China. Mar Drugs 2019; 17:md17030169. [PMID: 30875949 PMCID: PMC6471976 DOI: 10.3390/md17030169] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 03/02/2019] [Accepted: 03/11/2019] [Indexed: 01/01/2023] Open
Abstract
The present study was focused on the preparation and characterization of the antioxidant peptides by microwave-assisted enzymatic hydrolysis of collagen from sea cucumber Acaudina molpadioides (ASC-Am) obtained from Zhejiang Province in China. The results exhibited the effects of microwave irradiation on hydrolysis of ASC-Am with different protease. Neutrase was selected from the four common proteases (papain, pepsin, trypsin, and neutrase) based on the highest content and DPPH scavenging activity of hydrolysate Fa (Molecular weight < 1 kDa). The content and 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity of Fa obtained by hydrolysis of neutrase increased by 100% and 109% respectively at a microwave power of 300 W compared with no microwave irradiation. Five subfractions were obtained after performing the gel filtration chromatography, and the Fa.2 exhibited the highest DPPH scavenging activity. The amino acid analysis showed that the contents of Glutamic acid, Alanine, Tyrosine, and Phenylalanine in fraction Fa.2 increased significantly, but an obvious decrease in the content of Glycine was observed compared to Fa. Four peptides (Fa.2-A, Fa.2-B, Fa.2-C, and Fa.2-D) were purified from Fa.2 by high performance liquid chromatography, and Fa.2-C showed the highest DPPH scavenging activity. The sequence of Fa.2-C was identified as Phenylalanine-Leucine- Alanine-Proline with a half elimination ratio (EC50) of 0.385 mg/mL. The antioxidant activity of Fa.2-C was probably attributed to the small molecular sizes and the presence of hydrophobic amino acid residues in its sequence. This report provided a promising method for the preparation of antioxidant peptides from collagen for food and medicinal purposes.
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Simons VS, Lochnit G, Wilhelm J, Ishaque B, Rickert M, Steinmeyer J. Comparative Analysis of Peptide Composition and Bioactivity of Different Collagen Hydrolysate Batches on Human Osteoarthritic Synoviocytes. Sci Rep 2018; 8:17733. [PMID: 30531866 PMCID: PMC6286367 DOI: 10.1038/s41598-018-36046-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 11/13/2018] [Indexed: 11/09/2022] Open
Abstract
Collagen hydrolysates (CHs) are heterogeneous mixtures of collagen peptides that are often used as nutraceuticals for osteoarthritis (OA). In this study, we compared the peptide composition and pharmacological effects of three different CH preparations (CH-Alpha®, Peptan® B 2000 and Mobiforte®) as well as their production batches. Our biochemical analysis using MALDI-TOF mass spectrometry and the ICPL™-isotope labelling method revealed marked differences between different CH preparations and even between some production batches of the same preparation. We also investigated the pharmacological effects of these CHs on human fibroblast-like synoviocytes (FLS). No significant effects on cultured FLS could be demonstrated for either production batch of CH-Alpha®, Peptan® B 2000, and Mobiforte® analyzing a small number of pharmacological relevant targets. Thus, our study already shows for the first time that different production batches of the same CH preparation as well as different CH preparations can differ significantly in their peptide composition. In this line, further studies are also needed to verify equal pharmacological efficacy of CH batches on a much broader range of (patho)physiological relevant targets. If OA patients are to be offered a safe and effective nutraceutical a better knowledge about all potential effects as well as ensuring the same active-substance levels are a prerequisite.
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Affiliation(s)
- Viktor S Simons
- Laboratory for Experimental Orthopaedics, Department of Orthopaedics, Justus Liebig University Giessen, Paul-Meimberg-Str. 3, 35392, Giessen, Germany
| | - Guenter Lochnit
- Protein Analytics, Department of Biochemistry, Faculty of Medicine, Justus Liebig University Giessen, Friedrichstr. 24, 35392, Giessen, Germany
| | - Jochen Wilhelm
- German Lung Research Center, Justus Liebig University Giessen, Gaffkystr. 11, 35392, Giessen, Germany
| | - Bernd Ishaque
- Laboratory for Experimental Orthopaedics, Department of Orthopaedics, Justus Liebig University Giessen, Paul-Meimberg-Str. 3, 35392, Giessen, Germany
| | - Markus Rickert
- Laboratory for Experimental Orthopaedics, Department of Orthopaedics, Justus Liebig University Giessen, Paul-Meimberg-Str. 3, 35392, Giessen, Germany
| | - Juergen Steinmeyer
- Laboratory for Experimental Orthopaedics, Department of Orthopaedics, Justus Liebig University Giessen, Paul-Meimberg-Str. 3, 35392, Giessen, Germany.
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Effect of collagen supplementation on osteoarthritis symptoms: a meta-analysis of randomized placebo-controlled trials. INTERNATIONAL ORTHOPAEDICS 2018; 43:531-538. [DOI: 10.1007/s00264-018-4211-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 10/19/2018] [Indexed: 01/06/2023]
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A Pilot Study for the Detection of Cyclic Prolyl-Hydroxyproline (Pro-Hyp) in Human Blood after Ingestion of Collagen Hydrolysate. Nutrients 2018; 10:nu10101356. [PMID: 30248982 PMCID: PMC6213548 DOI: 10.3390/nu10101356] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 09/17/2018] [Accepted: 09/20/2018] [Indexed: 12/22/2022] Open
Abstract
Levels of short linear hydroxyproline (Hyp)-containing peptides, such as prolyl-hydroxyproline (Pro-Hyp), increase in human blood after the ingestion of collagen hydrolysate, which has been associated with beneficial effects for human skin and joints. The present study demonstrates the presence of a novel food-derived collagen peptide, cyclic Pro-Hyp, in human blood after the ingestion of collagen hydrolysate. The cyclic Pro-Hyp levels in plasma samples were estimated by liquid chromatography mass spectrometry (LC-MS). Cyclic Pro-Hyp levels significantly increased in the plasma after ingestion of collagen hydrolysate, reaching a maximum level after 2 h and then decreasing. The maximum level of cyclic Pro-Hyp in plasma ranged from 0.1413 to 0.3443 nmol/mL, representing approximately 5% of linear Pro-Hyp in plasma after ingestion of collagen hydrolysate. Addition of cyclic Pro-Hyp in medium at 7 nmol/mL significantly enhanced the growth rate of mouse skin fibroblasts on collagen gel more extensively compared to linear Pro-Hyp.
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Takuma M, Haruka K, Mutsuto W, Toshiki M, Kenshiro M, Akane T, Hiroshi M, Yoshihiro N. Olive leaf extract prevents cartilage degeneration in osteoarthritis of STR/ort mice. Biosci Biotechnol Biochem 2018; 82:1101-1106. [DOI: 10.1080/09168451.2018.1451741] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Abstract
The chondroprotective effect of olive leaf extract (OLE) on knee osteoarthritis (OA) was studied with STR/ort mice (n = 5). OLE was administrated with a dosage of 100 mg/kg for 8 weeks and the OA severity score of hind limb knee joints was then measured. The Mankin scores of the knee joints of the non-OA control group, OA control group and OLE-treated group were 3.50, 11.13 and 7.20, respectively. This suggests that oral OLE supplements help prevent cartilage degeneration in STR/ort mice. In vitro, the synthesis of high molecular weight hyaluronan in synovial cells (HIG-82) was increased by OLE stimulation. This suggests that OLE modulates hyaluronan metabolism in synovial cells and improves OA symptoms. Our findings indicate that OLE intake inhibits cartilage destruction by increasing high molecular weight hyaluronan and thus preventing OA progress.
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Affiliation(s)
- Maruyama Takuma
- Applied Protein Chemistry, Department of Agriculture, Tokyo University of Agriculture and Technology , Fuchu, Japan
| | - Kamihama Haruka
- Applied Protein Chemistry, Department of Agriculture, Tokyo University of Agriculture and Technology , Fuchu, Japan
| | - Watanabe Mutsuto
- Applied Protein Chemistry, Department of Agriculture, Tokyo University of Agriculture and Technology , Fuchu, Japan
| | | | - Matsuda Kenshiro
- Cooperative Major of Advanced Health Science, Tokyo University of Agriculture and Technology , Fuchu, Japan
| | - Tanaka Akane
- Cooperative Major of Advanced Health Science, Tokyo University of Agriculture and Technology , Fuchu, Japan
| | - Matsuda Hiroshi
- Cooperative Major of Advanced Health Science, Tokyo University of Agriculture and Technology , Fuchu, Japan
| | - Nomura Yoshihiro
- Applied Protein Chemistry, Department of Agriculture, Tokyo University of Agriculture and Technology , Fuchu, Japan
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Feng M, Betti M. A novel collagen glycopeptide, Pro-Hyp-CONH-GlcN, stimulates cell proliferation and hyaluronan production in cultured human dermal fibroblasts. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.04.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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28
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Offengenden M, Chakrabarti S, Wu J. Chicken collagen hydrolysates differentially mediate anti-inflammatory activity and type I collagen synthesis on human dermal fibroblasts. FOOD SCIENCE AND HUMAN WELLNESS 2018. [DOI: 10.1016/j.fshw.2018.02.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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29
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Shigemura Y, Suzuki A, Kurokawa M, Sato Y, Sato K. Changes in composition and content of food-derived peptide in human blood after daily ingestion of collagen hydrolysate for 4 weeks. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:1944-1950. [PMID: 28914450 DOI: 10.1002/jsfa.8677] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 09/07/2017] [Accepted: 09/10/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Daily ingestion of collagen hydrolysate for a long period improves skin and joint conditions. It has been speculated that the beneficial effects are exerted by food-derived hydroxyproline (Hyp) peptides, which are detected in human blood after single ingestions. In the present study, to investigate the effect of long-term ingestion of collagen hydrolysate on Hyp peptides profile in blood, the concentrations of Hyp-peptides in human blood before and after daily ingestion for a long period were examined. RESULTS Hyp-peptides increased to a maximum level at 1 h after ingestion and reverted to their initial levels within 24 h during experimental period. Pro-Gly and Hyp-peptides such as Pro-Hyp-Gly, Pro-Hyp, Ile-Hyp, Leu-Hyp, Hyp-Gly, Glu-Hyp and Ala-Hyp were identified in the blood after ingestion of collagen hydrolysate at 4.5 g day-1 for 4 weeks. For the whole period, Pro-Hyp was the leading compound. The compositional rate of Hyp-Gly showed a tendency to increase, while that of Pro-Hyp tended to decrease after daily ingestion. CONCLUSION The present results indicate that daily ingestion of collagen hydrolysate for a long period can change compositional rate of Hyp peptides in human blood. This fact suggests that long-term ingestion of collagen hydrolysate might change exo- or endo-type protease activity in the digestive tract, which may consequently promote beneficial effects. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Yasutaka Shigemura
- Department of Nutrition, Faculty of Domestic Science, Tokyo Kasei University, Tokyo, Japan
| | | | | | - Yoshio Sato
- Department of Nutrition, Faculty of Domestic Science, Tokyo Kasei University, Tokyo, Japan
| | - Kenji Sato
- Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
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Nishikimi A, Koyama YI, Ishihara S, Kobayashi S, Tometsuka C, Kusubata M, Kuwaba K, Hayashida O, Hattori S, Katagiri K. Collagen-derived peptides modulate CD4 + T-cell differentiation and suppress allergic responses in mice. IMMUNITY INFLAMMATION AND DISEASE 2018; 6:245-255. [PMID: 29388365 PMCID: PMC5946155 DOI: 10.1002/iid3.213] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 12/04/2017] [Accepted: 12/09/2017] [Indexed: 11/10/2022]
Abstract
INTRODUCTION Collagen peptides have been widely used as a food supplement. After ingestion of collagen peptides, oligopeptides containing hydroxyproline (Hyp), which are known to have some physiological activities, are detected in peripheral blood. However, the effects of collagen-peptide administration on immune response are unclear. In the present study, we tested the effects of collagen-peptide ingestion on allergic response and the effects of collagen-derived oligopeptides on CD4+ T-cell differentiation. METHODS BALB/c mice fed a collagen-peptide diet were immunized with ovalbumin (OVA), and their serum IgE and IgG levels, active cutaneous anaphylaxis, and cytokine secretion by splenocytes were examined. Naive CD4+ T cells were stimulated with anti-CD3 and anti-CD28 in the presence of collagen-derived oligopeptides, and the expression of IFN-γ, IL-4, and Foxp3 was analyzed. RESULTS In an active anaphylaxis model, oral administration of collagen peptides suppressed serum OVA-specific immunoglobulin E (IgE) production and diminished anaphylaxis responses. In this model, the ingestion of collagen peptides skewed the pattern of cytokine production by splenocytes toward T-helper (Th) type 1 and regulatory T (Treg) cells. In vitro T-helper cell differentiation assays showed that Hyp-containing oligopeptides promoted Th1 differentiation by upregulating IFN-γ-induced signal transducer and activator of transcription 1 (STAT1) signaling. These oligopeptides also promoted the development of Foxp3+ Treg cells in response to antigen stimulation in the presence of TGF-β. CONCLUSIONS Collagen-peptide ingestion suppresses allergic responses by skewing the balance of CD4+ T cells toward Th1 and Treg cells and seems to be a promising agent for preventing allergies and inflammatory diseases.
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Affiliation(s)
- Akihiko Nishikimi
- Department of Biosciences, School of Science, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Yoh-Ichi Koyama
- Research Institute of Biomatrix, Nippi Inc., Toride, Ibaraki, Japan.,Institute for Animal Reproduction, Kasumigaura, Ibaraki, Japan
| | - Sayaka Ishihara
- Department of Biosciences, School of Science, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Shusaku Kobayashi
- Department of Biosciences, School of Science, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Chisa Tometsuka
- Research Institute of Biomatrix, Nippi Inc., Toride, Ibaraki, Japan
| | - Masashi Kusubata
- Research Institute of Biomatrix, Nippi Inc., Toride, Ibaraki, Japan
| | - Kumiko Kuwaba
- Research Institute of Biomatrix, Nippi Inc., Toride, Ibaraki, Japan
| | - Osamu Hayashida
- Research Institute of Biomatrix, Nippi Inc., Toride, Ibaraki, Japan
| | - Shunji Hattori
- Research Institute of Biomatrix, Nippi Inc., Toride, Ibaraki, Japan
| | - Koko Katagiri
- Department of Biosciences, School of Science, Kitasato University, Sagamihara, Kanagawa, Japan
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Comblain F, Barthélémy N, Lefèbvre M, Schwartz C, Lesponne I, Serisier S, Feugier A, Balligand M, Henrotin Y. A randomized, double-blind, prospective, placebo-controlled study of the efficacy of a diet supplemented with curcuminoids extract, hydrolyzed collagen and green tea extract in owner's dogs with osteoarthritis. BMC Vet Res 2017; 13:395. [PMID: 29262825 PMCID: PMC5738810 DOI: 10.1186/s12917-017-1317-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 12/11/2017] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND We have previously demonstrated that a mixture of Curcuminoids extract, hydrolyzed COllagen and green Tea extract (CCOT) inhibited inflammatory and catabolic mediator's synthesis by bovine and human chondrocytes. A randomly allocated, double-blind, prospective, placebo-controlled study was performed to evaluate the efficacy of a diet containing this CCOT mixture on dogs with naturally occurring osteoarthritis (OA). Therefore, 42 owner's dogs with OA were randomly assigned to receive for 3 months an experimental diet (control) or the same diet supplemented with CCOT. RESULTS Ground reaction forces did not show statistical differences between groups. After 3 months of feeding, there was a significant reduction of pain at manipulation in the CCOT group, but not in the control group. The evolution for pain at manipulation depended on the diet. The three other parameters evaluated by veterinary subjective assessment (lameness, pain at palpation and joint mobility) did not show statistical differences. Concerning owner subjective assessment, pain severity score worsened in the control group but remained stable in CCOT group. The evolution for pain severity depended on the diet. No statistical difference was found for pain interference, except for the ability to rise to standing from lying down, which was significantly improved in the CCOT compared to the control group. Serum OA biomarkers did not show statistical differences. CONCLUSIONS Objective variables measured, such as ground reaction forces and OA biomarkers, did not show statistical differences. However, indicators of pain appeared reduced in dogs receiving CCOT mixture for 3 months. The difference of evolution between groups suggests that a greater number of dogs may be necessary to reach a stronger effect on other parameters.
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Affiliation(s)
- Fanny Comblain
- Bone and Cartilage Research Unit, Arthropôle Liège, University of Liège, Liège, Belgium
| | - Nicolas Barthélémy
- Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Michael Lefèbvre
- Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Cédric Schwartz
- Laboratory of Human Motion Analysis, University of Liège, Liège, Belgium
| | | | | | | | - Marc Balligand
- Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Yves Henrotin
- Bone and Cartilage Research Unit, Arthropôle Liège, University of Liège, Liège, Belgium. .,Physical Therapy & Rehabilitation Department, Princess Paola Hospital, Vivalia, Marche-en-Famenne, Belgium.
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Zague V, do Amaral JB, Rezende Teixeira P, de Oliveira Niero EL, Lauand C, Machado-Santelli GM. Collagen peptides modulate the metabolism of extracellular matrix by human dermal fibroblasts derived from sun-protected and sun-exposed body sites. Cell Biol Int 2017; 42:95-104. [PMID: 28906033 DOI: 10.1002/cbin.10872] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 09/03/2017] [Indexed: 11/07/2022]
Abstract
Clinical data published in recent years have demonstrated positive effects of collagen hydrolysate (CH) on skin aging clinical signs. CH use as food supplement has a long history; however, few studies have addressed the underlying purpose of CH on the cellular and molecular biology of skin cells that could elucidate clinical improvement findings. Wide diversity of characteristics has been reported for dermal fibroblasts derived from different body sites and it is unknown whether collagen peptides could modulate differently cells from chronological aged and photoaged skin areas. This study investigated the influence of CH on the extracellular matrix metabolism and proliferation of human dermal fibroblasts (HDFs) derived from chronological aged (sun-protected) and photoaged (sun-exposed) body sites. CH treatment did not affect cellular proliferation of either cell cultures, but notably modulated cell metabolism in monolayer model, increasing the content of dermal matrix precursor and main protein, procollagen I and collagen I, respectively. These effects were confirmed in the human dermal equivalent model. The increase in collagen content in the cultures was attributed to stimulation of biosynthesis and decreased collagen I metabolism through inhibition of metalloproteinase activity (MMP) 1 and 2. Modulation of CH in dermal metabolism did not differ between cells derived from sun-protected and sun-exposed areas, although lower concentrations of CH seemed to be enough to stimulate sun-exposed-derived HDFs, suggesting more pronounced effect in these cells. This study contributes to understanding the biological effects of CH on skin cells and viability of its use as a functional ingredient in food supplements.
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Affiliation(s)
- Vivian Zague
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of Sao Paulo, Av. Prof. Lineu Prestes, 1524, Sao Paulo, SP, 05508-000, Brazil
| | - Jonatas Bussador do Amaral
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of Sao Paulo, Av. Prof. Lineu Prestes, 1524, Sao Paulo, SP, 05508-000, Brazil
| | - Paula Rezende Teixeira
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of Sao Paulo, Av. Prof. Lineu Prestes, 1524, Sao Paulo, SP, 05508-000, Brazil
| | - Evandro Luis de Oliveira Niero
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of Sao Paulo, Av. Prof. Lineu Prestes, 1524, Sao Paulo, SP, 05508-000, Brazil
| | - Camila Lauand
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of Sao Paulo, Av. Prof. Lineu Prestes, 1524, Sao Paulo, SP, 05508-000, Brazil
| | - Glaucia Maria Machado-Santelli
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of Sao Paulo, Av. Prof. Lineu Prestes, 1524, Sao Paulo, SP, 05508-000, Brazil
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Boonmaleerat K, Wanachewin O, Phitak T, Pothacharoen P, Kongtawelert P. Fish Collagen Hydrolysates Modulate Cartilage Metabolism. Cell Biochem Biophys 2017; 76:279-292. [DOI: 10.1007/s12013-017-0817-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 07/17/2017] [Indexed: 01/19/2023]
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Fish Scale Collagen Peptides Protect against CoCl 2/TNF- α-Induced Cytotoxicity and Inflammation via Inhibition of ROS, MAPK, and NF- κB Pathways in HaCaT Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:9703609. [PMID: 28717410 PMCID: PMC5498912 DOI: 10.1155/2017/9703609] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 03/20/2017] [Accepted: 04/26/2017] [Indexed: 12/25/2022]
Abstract
Skin diseases associated with inflammation or oxidative stress represent the most common problem in dermatology. The present study demonstrates that fish scale collagen peptides (FSCP) protect against CoCl2-induced cytotoxicity and TNF-α-induced inflammatory responses in human HaCaT keratinocyte cells. Our study is the first to report that FSCP increase cell viability and ameliorate oxidative injury in HaCaT cells through mechanisms mediated by the downregulation of key proinflammatory cytokines, namely, TNF-α, IL-1β, IL-8, and iNOS. FSCP also prevent cell apoptosis by repressing Bax expression, caspase-3 activity, and cytochrome c release and by upregulating Bcl-2 protein levels in CoCl2- or TNF-α-stimulated HaCaT cells. In addition, the inhibitory effects of FSCP on cytotoxicity and the induction of proinflammatory cytokine expression were found to be associated with suppression of the ROS, MAPK (p38/MAPK, ERK, and JNK), and NF-κB signaling pathways. Taken together, our data suggest that FSCP are useful as immunomodulatory agents in inflammatory or immune-mediated skin diseases. Furthermore, our results provide new insights into the potential therapeutic use of FSCP in the prevention and treatment of various oxidative- or inflammatory stress-related inflammation and injuries.
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Daily oral consumption of hydrolyzed type 1 collagen is chondroprotective and anti-inflammatory in murine posttraumatic osteoarthritis. PLoS One 2017; 12:e0174705. [PMID: 28384173 PMCID: PMC5383229 DOI: 10.1371/journal.pone.0174705] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 03/14/2017] [Indexed: 01/06/2023] Open
Abstract
Osteoarthritis (OA) is a degenerative joint disease for which there are no disease modifying therapies. Thus, strategies that offer chondroprotective or regenerative capability represent a critical unmet need. Recently, oral consumption of a hydrolyzed type 1 collagen (hCol1) preparation has been reported to reduce pain in human OA and support a positive influence on chondrocyte function. To evaluate the tissue and cellular basis for these effects, we examined the impact of orally administered hCol1 in a model of posttraumatic OA (PTOA). In addition to standard chow, male C57BL/6J mice were provided a daily oral dietary supplement of hCol1 and a meniscal-ligamentous injury was induced on the right knee. At various time points post-injury, hydroxyproline (hProline) assays were performed on blood samples to confirm hCol1 delivery, and joints were harvested for tissue and molecular analyses were performed, including histomorphometry, OARSI and synovial scoring, immunohistochemistry and mRNA expression studies. Confirming ingestion of the supplements, serum hProline levels were elevated in experimental mice administered hCol1. In the hCol1 supplemented mice, chondroprotective effects were observed in injured knee joints, with dose-dependent increases in cartilage area, chondrocyte number and proteoglycan matrix at 3 and 12 weeks post-injury. Preservation of cartilage and increased chondrocyte numbers correlated with reductions in MMP13 protein levels and apoptosis, respectively. Supplemented mice also displayed reduced synovial hyperplasia that paralleled a reduction in Tnf mRNA, suggesting an anti-inflammatory effect. These findings establish that in the context of murine knee PTOA, daily oral consumption of hCol1 is chondroprotective, anti-apoptotic in articular chondrocytes, and anti-inflammatory. While the underlying mechanism driving these effects is yet to be determined, these findings provide the first tissue and cellular level information explaining the already published evidence of symptom relief supported by hCol1 in human knee OA. These results suggest that oral consumption of hCol1 is disease modifying in the context of PTOA.
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Isaka S, Someya A, Nakamura S, Naito K, Nozawa M, Inoue N, Sugihara F, Nagaoka I, Kaneko K. Evaluation of the effect of oral administration of collagen peptides on an experimental rat osteoarthritis model. Exp Ther Med 2017; 13:2699-2706. [PMID: 28587333 PMCID: PMC5450616 DOI: 10.3892/etm.2017.4310] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2015] [Accepted: 01/26/2017] [Indexed: 11/05/2022] Open
Abstract
Collagen is an extracellular matrix protein present in the skin, tendon, cartilage and bone. Collagen peptides (CP) are produced by the hydrolysis of gelatin (heat-denatured collagen) by proteases and are utilized as a component of nutraceuticals. The current study investigated the effect of CP on the articular cartilage of OA by evaluating the serum levels of biomarkers (CTX-II for type II collagen degradation and CPII for type II collagen synthesis), histopathological changes (Mankin score, based on the toluidine blue staining of proteoglycans), and immunohistochemical staining of matrix metalloproteinase (MMP)-13 and type II collagen, using a rat experimental osteoarthritis (OA) model. Anterior cruciate ligament transection (ACLT) was performed on the right knee joint to surgically induce OA. Animals were divided into four groups: Control group (Control), sham-operated group (Sham), ACLT group without collagen peptide (ACLT group) and ACLT group with oral administration of CP (CP group). ACLT induced histological damages and significantly increased the Mankin score (P<0.05). However, CP administration markedly suppressed the Mankin score, although this difference was not significant. In addition, serum CTX-II levels were significantly decreased in CP group compared with those in the ACLT group (P<0.05). By contrast, serum CPII levels did not differ significantly among the four groups. Moreover, immunohistochemical staining of type II collagen and MMP-13 (an important type II collagen-degrading enzyme) indicated that the amount of type II collagen increased, whereas the number of MMP-13 positive chondrocytes decreased in the CP group compared with ACLT group. These observations suggest that CP has the potential to exert chondroprotective action on OA by inhibiting MMP-13 expression and type II collagen degeneration.
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Affiliation(s)
- Satoko Isaka
- Department of Medicine for Motor Organ, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan.,Department of Orthopaedic Surgery, Juntendo University, Nerima Hospital, Tokyo 117-8521, Japan
| | - Akimasa Someya
- Department of Host Defense and Biochemical Research, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | - Shinji Nakamura
- Laboratory of Morphology and Image Analysis, Biomedical Research Center, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | - Kiyohito Naito
- Department of Medicine for Motor Organ, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | - Masahiko Nozawa
- Department of Medicine for Motor Organ, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan.,Department of Orthopaedic Surgery, Juntendo University, Nerima Hospital, Tokyo 117-8521, Japan
| | | | | | - Isao Nagaoka
- Department of Host Defense and Biochemical Research, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | - Kazuo Kaneko
- Department of Medicine for Motor Organ, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
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Yazaki M, Ito Y, Yamada M, Goulas S, Teramoto S, Nakaya MA, Ohno S, Yamaguchi K. Oral Ingestion of Collagen Hydrolysate Leads to the Transportation of Highly Concentrated Gly-Pro-Hyp and Its Hydrolyzed Form of Pro-Hyp into the Bloodstream and Skin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:2315-2322. [PMID: 28244315 DOI: 10.1021/acs.jafc.6b05679] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Collagen hydrolysate is a well-known dietary supplement for the treatment of skin aging; however, its mode of action remains unknown. Previous studies have shown that the oral ingestion of collagen hydrolysate leads to elevated levels of collagen-derived peptides in the blood, but whether these peptides reach the skin remains unclear. Here, we analyzed the plasma concentration of collagen-derived peptides after ingestion of high tripeptide containing collagen hydrolysate in humans. We identified 17 types of collagen-derived peptides transiently, with a particular enrichment in Gly-Pro-Hyp. This was also observed using an in vivo mouse model in the plasma and skin, albeit with a higher enrichment of Pro-Hyp in the skin. Interestingly, this Pro-Hyp enrichment in the skin was derived from Gly-Pro-Hyp hydrolysis, as the administration of pure Gly-Pro-Hyp peptide led to similar results. Therefore, we propose that functional peptides can be transferred to the skin by dietary supplements of collagen.
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Affiliation(s)
- Misato Yazaki
- Research Institute, FANCL Corporation , 12-13 Kamishinano, Totsukaku, Yokohama, Kanagawa 244-0806, Japan
- Department of Molecular Biology, Graduate School of Medical Science, Yokohama City University , 3-9 Fuku-ura, Kanazawaku, Yokohama 236-0004, Japan
| | - Yukihiko Ito
- Research Institute, FANCL Corporation , 12-13 Kamishinano, Totsukaku, Yokohama, Kanagawa 244-0806, Japan
| | - Masayoshi Yamada
- Research Institute, FANCL Corporation , 12-13 Kamishinano, Totsukaku, Yokohama, Kanagawa 244-0806, Japan
| | - Spyros Goulas
- Department of Molecular Biology, Graduate School of Medical Science, Yokohama City University , 3-9 Fuku-ura, Kanazawaku, Yokohama 236-0004, Japan
| | - Sachiyuki Teramoto
- Research Institute, FANCL Corporation , 12-13 Kamishinano, Totsukaku, Yokohama, Kanagawa 244-0806, Japan
| | - Masa-Aki Nakaya
- Department of Molecular Biology, Graduate School of Medical Science, Yokohama City University , 3-9 Fuku-ura, Kanazawaku, Yokohama 236-0004, Japan
| | - Shigeo Ohno
- Department of Molecular Biology, Graduate School of Medical Science, Yokohama City University , 3-9 Fuku-ura, Kanazawaku, Yokohama 236-0004, Japan
| | - Kohji Yamaguchi
- Research Institute, FANCL Corporation , 12-13 Kamishinano, Totsukaku, Yokohama, Kanagawa 244-0806, Japan
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Nie CH, Wan SM, Tomljanovic T, Treer T, Hsiao CD, Wang WM, Gao ZX. Comparative proteomics analysis of teleost intermuscular bones and ribs provides insight into their development. BMC Genomics 2017; 18:147. [PMID: 28183283 PMCID: PMC5301324 DOI: 10.1186/s12864-017-3530-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Accepted: 01/31/2017] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Intermuscular bones (IBs) and ribs both are a part of skeletal system in teleosts, but with different developing process. The chemical composition of fish IBs and ribs as well as the underlying mechanism about their development have not been investigated. In the present study, histological structures showed that one bone cavity containing osteoclasts were existed in ribs, but not in IBs of Megalobrama amblycephala. We constructed the first proteomics map for fish bones including IBs and ribs, and identified the differentially expressed proteins between IBs and ribs through iTRAQ LC-MS/MS proteomic analysis. RESULTS The proteins extracted from IBs and ribs at 1- to 2-year old M. amblycephala were quantified 2,342 proteins, with 1,451 proteins annotated with GO annotation in biological processes, molecular function and cellular component. A number of bone related proteins as well as pathways were identified in the study. A total of 93 and 154 differently expressed proteins were identified in comparison groups of 1-IB-vs-1-Rib and 2-IB-vs-2-Rib, which indicated the obvious differences of chemical composition between these two bone tissues. The two proteins (vitronectin b precursor and matrix metalloproteinase-2) related to osteoclasts differentiation were significantly up-regulated in ribs compared with IBs (P < 0.05), which was in accordance with the results from histological structures. In comparison groups of 1-IB-vs-2-IB and 1-Rib-vs-2-Rib, 33 and 51 differently expressed proteins were identified and the function annotation results showed that these proteins were involved in regulating bone development and differentiation. Subsequently, 11 and 13 candidate proteins in comparison group of 1-IB-vs-1-Rib and 1-IB-vs-2-IB related to bone development were validated by MRM assays. CONCLUSIONS Our present study suggested the different key proteins involved in the composition of fish ribs and IBs as well as their growth development. These findings could provide important clues towards further understanding of fish skeletal system and the roles of proteins playing in regulating diverse biological processes in fish.
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Affiliation(s)
- Chun-Hong Nie
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei 430070 China
- Collaborative Innovation Center for Healthy Freshwater Aquaculture of Hubei Province, Wuhan, 430070 China
| | - Shi-Ming Wan
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei 430070 China
- Collaborative Innovation Center for Healthy Freshwater Aquaculture of Hubei Province, Wuhan, 430070 China
| | - Tea Tomljanovic
- Department for Fisheries, Beekeeping, Game management and Special Zoology, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
| | - Tomislav Treer
- Department for Fisheries, Beekeeping, Game management and Special Zoology, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
| | - Chung-Der Hsiao
- Department of Bioscience Technology, Chung Yuan Christian University, Chung-Li, Taiwan
| | - Wei-Min Wang
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei 430070 China
| | - Ze-Xia Gao
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei 430070 China
- Collaborative Innovation Center for Healthy Freshwater Aquaculture of Hubei Province, Wuhan, 430070 China
- Hubei Provincial Engineering Laboratory for Pond Aquaculture, Wuhan, 430070 Hubei China
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The Cooperative Effect of Genistein and Protein Hydrolysates on the Proliferation and Survival of Osteoblastic Cells (hFOB 1.19). Molecules 2016; 21:molecules21111489. [PMID: 27834834 PMCID: PMC6274156 DOI: 10.3390/molecules21111489] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Revised: 11/03/2016] [Accepted: 11/04/2016] [Indexed: 11/26/2022] Open
Abstract
Chum salmon skin gelatin, de-isoflavoned soy protein, and casein were hydrolyzed at two degrees of hydrolysis. Genistein, the prepared hydrolysates, and genistein-hydrolysate combinations were assessed for their proliferative and anti-apoptotic effects on human osteoblasts (hFOB 1.19) to clarify potential cooperative effects between genistein and these hydrolysates in these two activities. Genistein at 2.5 μg/L demonstrated the highest proliferative activity, while the higher dose of genistein inhibited cell growth. All hydrolysates promoted osteoblast proliferation by increasing cell viability to 102.9%–131.1%. Regarding etoposide- or NaF-induced osteoblast apoptosis, these hydrolysates at 0.05 g/L showed both preventive and therapeutic effects against apoptosis. In the mode of apoptotic prevention, the hydrolysates decreased apoptotic cells from 32.9% to 15.2%–23.7% (etoposide treatment) or from 23.6% to 14.3%–19.6% (NaF treatment). In the mode of apoptotic rescue, the hydrolysates lessened the extent of apoptotic cells from 15.9% to 13.0%–15.3% (etoposide treatment) or from 13.3% to 10.9%–12.7% (NaF treatment). Gelatin hydrolysates showed the highest activities among all hydrolysates in all cases. All investigated combinations (especially the genistein-gelatin hydrolysate combination) had stronger proliferation, apoptotic prevention, and rescue than genistein itself or their counterpart hydrolysates alone, suggesting that genistein cooperated with these hydrolysates, rendering greater activities in osteoblast proliferation and anti-apoptosis.
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Comblain F, Dubuc JE, Lambert C, Sanchez C, Lesponne I, Serisier S, Henrotin Y. Identification of Targets of a New Nutritional Mixture for Osteoarthritis Management Composed by Curcuminoids Extract, Hydrolyzed Collagen and Green Tea Extract. PLoS One 2016; 11:e0156902. [PMID: 27275599 PMCID: PMC4898725 DOI: 10.1371/journal.pone.0156902] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 05/20/2016] [Indexed: 12/29/2022] Open
Abstract
Objective We have previously demonstrated that a mixture of curcuminoids extract, hydrolyzed collagen and green tea extract (COT) inhibited inflammatory and catabolic mediator’s synthesis by osteoarthritic human chondrocytes. The objective of this study was to identify new targets of COT using genomic and proteomic approaches. Design Cartilage specimens were obtained from 12 patients with knee osteoarthritis. Primary human chondrocytes were cultured in monolayer until confluence and then incubated for 24 or 48 hours in the absence or in the presence of human interleukin(IL)-1β (10-11M) and with or without COT, each compound at the concentration of 4 μg/ml. Microarray gene expression profiling between control, COT, IL-1β and COT IL-1β conditions was performed. Immunoassays were used to confirm the effect of COT at the protein level. Results More than 4000 genes were differentially expressed between conditions. The key regulated pathways were related to inflammation, cartilage metabolism and angiogenesis. The IL-1β stimulated chemokine ligand 6, matrix metalloproteinase-13, bone morphogenetic protein-2 and stanniocalcin1 gene expressions and protein productions were down-regulated by COT. COT significantly decreased stanniocalcin1 production in basal condition. Serpin E1 gene expression and protein production were down-regulated by IL-1β. COT reversed the inhibitory effect of IL-1β. Serpin E1 gene expression was up-regulated by COT in control condition. Conclusion The COT mixture has beneficial effect on osteoarthritis physiopathology by regulating the synthesis of key catabolic, inflammatory and angiogenesis factors. These findings give a scientific rationale for the use of these natural ingredients in the management of osteoarthritis.
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Affiliation(s)
- Fanny Comblain
- Bone and Cartilage Research Unit, Arthropôle Liège, University of Liège, CHU Sart-Tilman, Liège, Belgium
| | - Jean-Emile Dubuc
- Orthopedic Department, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - Cécile Lambert
- Bone and Cartilage Research Unit, Arthropôle Liège, University of Liège, CHU Sart-Tilman, Liège, Belgium
| | - Christelle Sanchez
- Bone and Cartilage Research Unit, Arthropôle Liège, University of Liège, CHU Sart-Tilman, Liège, Belgium
| | | | | | - Yves Henrotin
- Bone and Cartilage Research Unit, Arthropôle Liège, University of Liège, CHU Sart-Tilman, Liège, Belgium
- Physical Therapy and Rehabilitation Department, Princess Paola Hospital, Vivalia, Marche-en-Famenne, Belgium
- * E-mail:
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Comblain F, Sanchez C, Lesponne I, Balligand M, Serisier S, Henrotin Y. Curcuminoids extract, hydrolyzed collagen and green tea extract synergically inhibit inflammatory and catabolic mediator's synthesis by normal bovine and osteoarthritic human chondrocytes in monolayer. PLoS One 2015; 10:e0121654. [PMID: 25799427 PMCID: PMC4370821 DOI: 10.1371/journal.pone.0121654] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 02/12/2015] [Indexed: 12/23/2022] Open
Abstract
The main objective of this study was to assess the in vitro effects of curcuminoids extract, hydrolyzed collagen and green tea extract in normal bovine chondrocytes and osteoarthritic human chondrocytes cultured in monolayer. This study also investigated the synergic or additive effects of these compounds. Enzymatically isolated primary bovine or human chondrocytes were cultured in monolayer until confluence and then incubated for 24 hours or 48 hours in the absence or in the presence of interleukin-1β and with or without curcuminoids extract, hydrolyzed collagen or green tea extract, added alone or in combination, at different concentrations. Cell viability was neither affected by these compounds, nor by interleukin 1β. In the absence of interleukin-1β, compounds did not significantly affect bovine chondrocytes metabolism. In human chondrocytes and in the absence of interleukin 1β, curcuminoids extract alone or in combination with hydrolyzed collagen and green tea extract significantly inhibited matrix metalloproteinase-3 production. In interleukin-1β-stimulated bovine chondrocytes, interleukin-6, inducible nitric oxide synthase, cyclooxygenase2, matrix metalloproteinase 3, a disintegrin and metalloproteinase with thrombospondin type I motifs 4 and a disintegrin and metalloproteinase with thrombospondin type I motifs 5 expressions were decreased by curcuminoids extract alone or in combination with hydrolyzed collagen and green tea extract. The combination of the three compounds was significantly more efficient to inhibit interleukin-1β stimulated matrix metalloproteinase-3 expression than curcuminoids extract alone. In interleukin-1β-stimulated human chondrocytes, nitric oxide, interleukin-6 and matrix metalloproteinase 3 productions were significantly reduced by curcuminoids extract alone or in combination with hydrolyzed collagen and green tea extract. These findings indicate that a mixture of curcuminoids extract, hydrolyzed collagen and green tea extract has beneficial effects on chondrocytes culture in inflammatory conditions and provide a preclinical basis for the in vivo testing of this mixture.
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Affiliation(s)
- Fanny Comblain
- Bone and Cartilage Research Unit, Arthropôle Liège, University of Liège, CHU Sart-Tilman, Liège, Belgium
| | - Christelle Sanchez
- Bone and Cartilage Research Unit, Arthropôle Liège, University of Liège, CHU Sart-Tilman, Liège, Belgium
| | | | - Marc Balligand
- Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | | | - Yves Henrotin
- Bone and Cartilage Research Unit, Arthropôle Liège, University of Liège, CHU Sart-Tilman, Liège, Belgium; Physical Therapy and Rehabilitation department, Princess Paola Hospital, Marche-en-Famenne, Belgium
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Kumar S, Sugihara F, Suzuki K, Inoue N, Venkateswarathirukumara S. A double-blind, placebo-controlled, randomised, clinical study on the effectiveness of collagen peptide on osteoarthritis. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2015; 95:702-707. [PMID: 24852756 DOI: 10.1002/jsfa.6752] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 04/29/2014] [Accepted: 05/18/2014] [Indexed: 06/03/2023]
Abstract
BACKGROUND Recent studies show that enzymatically hydrolysed collagen, the collagen peptide, is absorbed and distributed to joint tissues and has analgesic and anti-inflammatory properties. A double-blind, placebo-controlled, randomised trial with collagen peptides isolated from pork skin (PCP) and bovine bone (BCP) sources was carried out to study the effectiveness of orally supplemented collagen peptide to control the progression of osteoarthritis in patients diagnosed with knee osteoarthritis. Improvement in treatment was assessed with reduction in Western Ontario McMaster Universities (WOMAC), visual analogue scale (VAS) and quality of life (QOL) scores from baseline to 13 weeks (Visit 7). Safety and tolerability were also evaluated. RESULTS There was significant reduction from baseline to Visit 7 in the primary end points of WOMAC and VAS scores and in the secondary end point of QOL score in subjects with PCP and BCP groups, while in subjects with placebo group the end point indices remained unaltered. Furthermore, all the score levels of WOMAC, VAS and QOL decreased significantly (P < 0.01) in the study group compared to placebo group in Visit 7. CONCLUSION The study demonstrated that collagen peptides are potential therapeutic agents as nutritional supplements for the management of osteoarthritis and maintenance of joint health.
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Affiliation(s)
- Suresh Kumar
- Nitta Gelatin India Ltd, Kinfra Parks Ltd, Kakkanad, Cochin - 682030, India
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A dietary supplement improves facial photoaging and skin sebum, hydration and tonicity modulating serum fibronectin, neutrophil elastase 2, hyaluronic acid and carbonylated proteins. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 144:94-103. [DOI: 10.1016/j.jphotobiol.2014.12.025] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 12/11/2014] [Accepted: 12/27/2014] [Indexed: 11/22/2022]
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Liu C, Liu X, Xue Y, Ding T, Sun J. Hydrolyzed tilapia fish collagen modulates the biological behavior of macrophages under inflammatory conditions. RSC Adv 2015. [DOI: 10.1039/c5ra02355f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
This is the first study showing that HFC can inhibit the excessive production of inflammatory mediators in RAW264.7 macrophages.
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Affiliation(s)
- Chao Liu
- Shanghai Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai Biomaterials Research & Testing Center
- Shanghai 200023
- China
| | - Xin Liu
- Shanghai Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai Biomaterials Research & Testing Center
- Shanghai 200023
- China
| | - Yang Xue
- Shanghai Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai Biomaterials Research & Testing Center
- Shanghai 200023
- China
| | - Tingting Ding
- Shanghai Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai Biomaterials Research & Testing Center
- Shanghai 200023
- China
| | - Jiao Sun
- Shanghai Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai Biomaterials Research & Testing Center
- Shanghai 200023
- China
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Hara M, Nakashima M, Fujii T, Uehara K, Yokono C, Hashizume R, Nomura Y. Construction of collagen gel scaffolds for mechanical stress analysis. Biosci Biotechnol Biochem 2014; 78:458-61. [PMID: 25036833 DOI: 10.1080/09168451.2014.882749] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
We designed a cyclic compression system using readily available six-well culture plates to investigate the influence of mechanical stress on skin-like structures. The effects of cyclic mechanical stress on protein expression by cells were easily examined, and hence, this system should be useful for further analysis of skin responses to mechanical stress.
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Affiliation(s)
- Masao Hara
- a Advanced Technology Research Laboratory , NOF Corporation , Ibaraki , Japan
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Shigemura Y, Kubomura D, Sato Y, Sato K. Dose-dependent changes in the levels of free and peptide forms of hydroxyproline in human plasma after collagen hydrolysate ingestion. Food Chem 2014; 159:328-32. [PMID: 24767063 DOI: 10.1016/j.foodchem.2014.02.091] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 01/27/2014] [Accepted: 02/18/2014] [Indexed: 10/25/2022]
Abstract
The presence of hydroxyproline (Hyp)-containing peptides in human blood after collagen hydrolysate ingestion is believed to exert beneficial effects on human health. To estimate the effective beneficial dose of these peptides, we examined the relationship between ingested dose and food-derived Hyp levels in human plasma. Healthy volunteers (n=4) ingested 30.8, 153.8 and 384.6 mg per kg body weight of collagen hydrolysate. The average plasma concentration of Hyp-containing peptides was dose-dependent, reaching maximum levels of 6.43, 20.17 and 32.84 nmol/ml following ingestion of 30.8, 153.8 and 384.6-mg doses of collagen hydrolysate, respectively. Ingesting over 153.8 mg of collagen hydrolysate significantly increased the average concentrations of the free and peptide forms of Hyp in plasma. The Hyp absorption limit was not reached with ingestion of as much as 384.6 mg of collagen hydrolysate. These finding suggest that ingestion of less than 30.8 mg of collagen hydrolysate is not effective for health benefits.
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Affiliation(s)
- Yasutaka Shigemura
- Department of Nutrition, Faculty of Domestic Science, Tokyo Kasei University, 1-18-1 Kaga, Itabashi-ku, Tokyo 173-8602, Japan.
| | - Daiki Kubomura
- Yaizu Suisankagaku Industry Co., Ltd., 11-1, Surugaku-Minamichou, Shizuoka City, Shizuoka 422-8067, Japan
| | - Yoshio Sato
- Department of Nutrition, Faculty of Domestic Science, Tokyo Kasei University, 1-18-1 Kaga, Itabashi-ku, Tokyo 173-8602, Japan
| | - Kenji Sato
- Division of Applied Life Sciences, Graduate School of Life and Environment Sciences, Kyoto Prefectural University, 1-5 Shimogamo, Kyoto 606-8522, Japan
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Yamada S, Nagaoka H, Terajima M, Tsuda N, Hayashi Y, Yamauchi M. Effects of fish collagen peptides on collagen post-translational modifications and mineralization in an osteoblastic cell culture system. Dent Mater J 2014; 32:88-95. [PMID: 23370875 DOI: 10.4012/dmj.2012-220] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Collagen is one of the most widely used biomaterials for tissue engineering and regenerative medicine. Fish collagen peptides (FCP) have been used as a dietary supplement, but their effects on the cellular function are still poorly understood. The objective of this study was to investigate the effects of FCP on collagen synthesis, quality and mineralization using an osteoblastic MC3T3-E1 cell culture system. Cells treated with FCP significantly upregulated the gene expression of several collagen modifying enzymes and more collagen was deposited in the cultures. Collagen in the treated group showed a greater extent of lysine hydroxylation, higher levels of hydroxylysine-aldehyde derived cross-links and accelerated cross-link maturation compared with the untreated group. Furthermore, the treated group showed accelerated matrix mineralization. These results indicate that FCP exerts a positive effect on osteoblastic cells in terms of collagen synthesis, quality and mineralization, thereby suggesting the potential utility of FCP for bone tissue engineering.
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Affiliation(s)
- Shizuka Yamada
- NC Oral Health Institute, School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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Uehara K, Hara M, Matsuo T, Namiki G, Watanabe M, Nomura Y. Hyaluronic acid secretion by synoviocytes alters under cyclic compressive load in contracted collagen gels. Cytotechnology 2013; 67:19-26. [PMID: 24287612 DOI: 10.1007/s10616-013-9669-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Accepted: 11/18/2013] [Indexed: 11/27/2022] Open
Abstract
Knee osteoarthritis is a degenerative disease of diarthrodial joints. Biomechanical factors are considered as risk factors for the disease, the knee joint being normally subject to pressure. Some studies have examined the biomechanical environment of the knee joint in vitro. The aim of this study was to establish a culture model to mimic the knee joint environment. As a first step, synoviocytes induced contraction of three-dimensional collagen gels. Next, contracted collagen gels containing synoviocytes underwent cyclical compression ranging from 0 to 40 kPa at a frequency of 1.0 Hz for 1.5, 3, 6 and 12 h using the FX-4000C™ Flexercell(®) Compression Plus™ System. RNA in collagen gels was extracted immediately after compression and mRNA expression levels of HAS genes were analyzed by quantitative RT-PCR. Culture medium was collected 48 h after compression and analyzed by agarose gel electrophoresis and cellulose acetate electrophoresis. Synoviocytes in contracted collagen gels were stimulated by cyclic compressive load. Long-term compressive stimulation led to the production of higher molecular weight hyaluronic acid, whereas, short-term, compressive stimulation increased the total amount of hyaluronic acid. Furthermore, mRNA expression levels of both HAS-1 and HAS-2 were significantly higher than without compression. Taken together, using this gel culture system, synoviocytes synthesized higher molecular weight hyaluronic acid and produced large quantities of hyaluronic acid through up-regulation of HAS gene expression. Therefore, the contracted collagen gel model will be a useful in vitro three-dimensional model of the knee joint.
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Affiliation(s)
- Kazuki Uehara
- Applied Protein Chemistry, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, 183-8509, Tokyo, Japan
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KOYAMA YI, KUSUBATA M. Effects of Collagen Peptide Ingestion on Blood Lipids in Rats Fed a High-Lipid and High-Sucrose Diet. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2013. [DOI: 10.3136/fstr.19.1149] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kawaguchi T, Nanbu PN, Kurokawa M. Distribution of prolylhydroxyproline and its metabolites after oral administration in rats. Biol Pharm Bull 2012; 35:422-7. [PMID: 22382331 DOI: 10.1248/bpb.35.422] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Prolylhydroxyproline (Pro-Hyp), which is derived from collagen hydrolysate, has been shown to be beneficial for skin and joint health. However, little is known about the distribution of Pro-Hyp in these tissues. In the present study, we investigated the biodistribution of orally administered [(14)C]Pro-Hyp in rats. Whole-body autoradiography at 30 min after administration of [(14)C]Pro-Hyp showed that radioactivity is widely distributed in tissues including skin and articular cartilage, with the highest level of radioactivity observed in the gastric and intestinal walls. Incorporation of radioactivity into cells known to respond to Pro-Hyp such as dermal fibroblasts, synovial cells, chondrocytes, osteoblasts, and osteoclasts was observed. The chemical form of [(14)C]Pro-Hyp-derived radioactivity detected in the tissues was investigated by thin layer chromatography. The radioactive constituents in cartilage extract were two proline-modified peptides (56%), intact Pro-Hyp (5%), and two nonpeptide metabolites (28%). Similar results were obtained for skin and bone marrow. Plasma analysis at 3 to 30 min post-dose suggested that the majority of Pro-Hyp is modified in its proline residue by a first-pass effect without peptide bond hydrolysis. In conclusion, we demonstrated that Pro-Hyp is partly distributed in observed tissues including skin and cartilage in its intact form, which might be responsible for its biological functions.
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