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Bone & Joint Research
Vol. 13, Issue 4 | Pages 169 - 183
15 Apr 2024
Gil-Melgosa L Llombart-Blanco R Extramiana L Lacave I Abizanda G Miranda E Agirre X Prósper F Pineda-Lucena A Pons-Villanueva J Pérez-Ruiz A

Aims

Rotator cuff (RC) injuries are characterized by tendon rupture, muscle atrophy, retraction, and fatty infiltration, which increase injury severity and jeopardize adequate tendon repair. Epigenetic drugs, such as histone deacetylase inhibitors (HDACis), possess the capacity to redefine the molecular signature of cells, and they may have the potential to inhibit the transformation of the fibro-adipogenic progenitors (FAPs) within the skeletal muscle into adipocyte-like cells, concurrently enhancing the myogenic potential of the satellite cells.

Methods

HDACis were added to FAPs and satellite cell cultures isolated from mice. The HDACi vorinostat was additionally administered into a RC injury animal model. Histological analysis was carried out on the isolated supra- and infraspinatus muscles to assess vorinostat anti-muscle degeneration potential.


Bone & Joint Research
Vol. 9, Issue 12 | Pages 884 - 893
1 Dec 2020
Guerado E Cano JR Pons-Palliser J

Aims

A systematic literature review focusing on how long before surgery concurrent viral or bacterial infections (respiratory and urinary infections) should be treated in hip fracture patients, and if there is evidence for delaying this surgery.

Methods

A total of 11 databases were examined using the COre, Standard, Ideal (COSI) protocol. Bibliographic searches (no chronological or linguistic restriction) were conducted using, among other methods, the Patient, Intervention, Comparison, Outcome (PICO) template. We followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines for flow diagram and checklist. Final reading of the complete texts was conducted in English, French, and Spanish. Classification of papers was completed within five levels of evidence (LE).


Orthopaedic Proceedings
Vol. 87-B, Issue SUPP_I | Pages 84 - 84
1 Mar 2005
Forriol F Pons J Ripalda P Izal I
Full Access

Introduction and purpose: We have studied the in-vitro response of older and osteoarthritic chondrocytes when confronted with various factors in order to analyze the possible reversion of their phenotype to that of healthy chondrocytes.

Materials and methods: The study used cartilage from young (3 months’ old) and old (7 years old) lambs with an osteoarthritic pathology. The latter group was obtained by means of a meniscectomy after a two-month evolution. Cells coming from the femur cartilage were isolated by means of collagenase digestion and cultured in a single layer using a DMEM culture medium supplemented with 10% fetal serum, penicilin and streptomycin, hepes and L-cystein (Gibco-BRL®). BrdU incorporation assays were performed by means of an ELISA protocol in order to analyze the proliferation rate. Later, a gene expression analysis was conducted using RT-PCR. The treatment was carried out at a concentration of 50 ng/mL using FGFa, IGF-a, TGF-b (Peprotech Inc) and OP-1 (Stryker) growth factors, and later growth factor combinations FGFa/IGF-1, FGFa/OP-1, FGFa/TGF-b and TGF-b/OP-1.

Results and conclusions: Comparison between the three groups showed that the proliferation rate was lower in older and osteoarthritic cells. These last two groups, however, did not have the same expression pattern as the genes studied. The analysis of the response to growth factors showed that FGFa and IGF-1 were the most efficient ones, and their combination proved to be the most powerful of all.