Objective: To prepare a composite membrane with collagen scaffold material for tissue culture.
Methods: Pure collagen membrane, collagen/hyaluronic acid (HA) membrane, collagen/chitosan membrane and collagen/chitosan/ HA membrane (abbreviated as composite collagen membrane) were prepared respectively, and their respective biodegradation time and the number of the cells proliferated on them were examined in vitro.
Result: The biodegradation time of pure collagen, collagen/HA and composite collagen membranes in vitro was 1 380, 1 376 and 1 560 min respectively, and the number of cells proliferated on the collagen/HA membrane and the composite collagen membrane were greater than that on the pure collagen membrane.
Conclusions: Addition of chitosan can decrease the biodegradation of the collagen membrane in vitro, while HA can not; HA Can contribute to cell adhesion and proliferation on the collagen membranes, but chitosan does not.
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Colloids Surf B Biointerfaces
December 2024
Department of Plastic and Cosmetic Surgery, The Second Affiliated Hospital of Army Medical University, Chongqing 400038, China. Electronic address:
The chronic diabetic wounds represented by diabetes foot ulcers (DFUs) are a worldwide challenge. Excessive production of reactive oxygen species (ROS) and persistent inflammation caused by the impaired phenotype switch of macrophages from M1 to M2 during wound healing are the main culprits of non-healing diabetic wounds. Therefore, an injectable DMM/GelMA hydrogel as a promising wound dressing was designed to regulate the mitochondrial metabolism of macrophages via inhibiting succinate dehydrogenase (SDH) activity and to promote macrophage repolarization towards M2 type.
View Article and Find Full Text PDFInflamm Res
January 2025
Department of Pharmacy, University "G. d'Annunzio" of Chieti-Pescara, 66100, Chieti, Italy.
Objective: This study explores whether hyaluronic acid (HA) of different molecular weights and collagen, given their role in tendon extracellular matrix maintenance, have a synergistic effect on human tendon-derived cells, with the aim to improve the treatment of tendinopathy.
Material: Human monocytes (CRL-9855™) and primary Achilles tendon-derived cells.
Treatment: The collagen/HA ratio was based on the formulation of the commercial food supplement TendoGenIAL™.
Sci Rep
January 2025
Department of Sports Medical Science, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
Postoperative adhesion around nerves sometimes results in sensory and motor dysfunctions. To prevent these disorders, we have developed an electrospun nanofiber sheet incorporating methylcobalamin (MeCbl), an active form of vitamin B12 with anti-inflammatory and neuroregenerative effects. This study aimed to investigate the neuroprotective effects of MeCbl sheets against postoperative adhesion and to compare the effects of MeCbl sheets with those of porcine small intestinal submucosa (SIS) sheets using a rat sciatic nerve adhesion model.
View Article and Find Full Text PDFFront Immunol
January 2025
Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban, South Africa.
Rheumatoid arthritis (RA), a condition characterized by joint deterioration through the action of matrix metalloproteinases (MMPs), is prevalent worldwide. Bee venom (BV) has traditionally been used in Chinese medicine for pain, arthritis, rheumatism, skin diseases, etc. BV is enriched with active substances, notably melittin and phospholipase A2 (PLA2), offering significant therapeutic potential.
View Article and Find Full Text PDFACS Omega
December 2024
Heidelberg University, Medical Faculty Mannheim, Biomedical Chemistry, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany.
By possibly bridging the gap between 2D cell assays and applications, tumor cell spheroid cultures offer promising avenues for advancing innovation in nuclear medicine. Regarding the evaluation of therapeutic radioligands, tumor cell spheroids have been successfully used to assess the therapeutic efficacy against human tumors. However, studies employing spheroids for testing diagnostic tracers are missing.
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