Application of sodium lactate and sodium citrate to modify biofunctional properties of denatured collagen hydrogel: experimental results
- Authors: Markov P.A.1, Eremin P.S.1, Rozhkova E.A.1
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Affiliations:
- National Medical Research Center of Rehabilitation and Balneology, Ministry of Health of Russia
- Issue: Vol 36, No 11 (2025)
- Pages: 68-72
- Section: From Practice
- URL: https://ogarev-online.ru/0236-3054/article/view/362944
- DOI: https://doi.org/10.29296/25877305-2025-11-11
- ID: 362944
Cite item
Abstract
Objective. To evaluate the mechanical strength, biodegradability, and functional response of human fibroblasts to a collagen hydrogel modified with lactate and citric acid salts.
Materials and methods. Denatured type I collagen (First Alive Collagen, Russia) and 80 mM sodium lactate and sodium citrate solutions were used in the study. The mechanical properties of the samples were analyzed using a TX-700 texture analyzer (Lamy Rheology Instruments, France). The biological properties of the materials were assessed according to the standards set forth in GOST ISO 10993-5-2011. The cellular response of human fibroblasts to the biomaterials was assessed using light and fluorescence microscopy. Cell viability was assessed using the CCK-8 reagent kit (WST-8). The amount of collagen and fibronectin was assessed using ELISA kits (Cloud-Clone Corp.).
Results. Modifying collagen hydrogel with tricarboxylic acid salts resulted in hydrogel biomaterials with enhanced strength and resistance to biodegradation. The resulting modified hydrogels exhibited high biocompatibility and the ability to support fibroblast growth and proliferative activity. The ability of a hydrogel modified with a citric acid salt to stimulate fibroblast production of extracellular matrix proteins was demonstrated.
Conclusion. Thus, these results complement the literature and demonstrate that lactic or citric acid salts increase the resistance of collagen hydrogel to biodegradation while maintaining the hydrogel's high biocompatibility. Furthermore, the use of sodium citrate was found to regulate the cellular functional response, specifically the production of extracellular matrix proteins – type I collagen and fibronectin – by fibroblasts. Controlling excessive fibroblast activation and unregulated deposition of extracellular matrix proteins is of interest both in developing an effective strategy for addressing excessive connective tissue growth and fibrosis, and for inhibiting fibrous encapsulation of implanted biomaterials.
About the authors
P. A. Markov
National Medical Research Center of Rehabilitation and Balneology, Ministry of Health of Russia
Author for correspondence.
Email: p.a.markov@mail.ru
ORCID iD: 0000-0002-4803-4803
SPIN-code: 7493-5203
Candidate of Biological Sciences
Russian Federation, MoscowP. S. Eremin
National Medical Research Center of Rehabilitation and Balneology, Ministry of Health of Russia
Email: p.a.markov@mail.ru
ORCID iD: 0000-0001-8832-8470
SPIN-code: 8597-6596
Russian Federation, Moscow
E. A. Rozhkova
National Medical Research Center of Rehabilitation and Balneology, Ministry of Health of Russia
Email: p.a.markov@mail.ru
ORCID iD: 0000-0002-2440-9244
SPIN-code: 1578-6338
Biol.D
Russian Federation, MoscowReferences
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