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Posts Taged surgical-meshes

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Combination of stem cell therapy and laparoscopy for the treatment of congenital hernia

Researchers of CCMIJU and NANBIOSIS Unit 14 Cell Therapy, led by Javier García Casado, have recently published a study with the purpose to combine stem cell therapy and laparoscopy for the treatment of congenital hernia in a swine animal model proposing an easy and feasible method to combine stem cell therapy and minimally invasive surgical techniques for hernia repair, the first preclinical study evaluating the use of stem cell therapy in the field of abdominal hernias in a clinically relevant swine model with congenital hernia

Surgical procedures and imaging diagnoses were performed at the ICTS NANBIOSIS Unit 21 Experimental operating rooms, led by Francisco M. Sánchez Margallo

“We developed an experimental approach to test whether the use of stem cells for abdominal hernia treatment is viable in a clinically relevant animal model. To the best of our knowledge, this is the first preclinical study where pigs with congenital abdominal hernias were treated with surgical meshes seeded with adult stem cells. Additionally, the surgical approach was performed with minimally invasive procedures to avoid complications related to open surgery. An exhaustive follow-up was performed at different time points using different evaluation methods: ultrasonography, gene expression analysis, complete histological evaluation, and cellular characterization by flow cytometry of infiltrated leukocytes.”

Article of reference:

Laparoscopy for the Treatment of Congenital Hernia: Use of Surgical Meshes and Mesenchymal Stem Cells in a Clinically Relevant Animal. Federica Marinaro, Javier G. Casado, Rebeca Blázquez, Mauricio Veloso Brun, Ricardo Marcos, Marta Santos, Francisco Javier Duque, Esther López, Verónica Álvarez, Alejandra Usón and Francisco Miguel Sánchez-Margallo. ModelFront. Pharmacol., 25 September 2020 https://doi.org/10.3389/fphar.2020.01332

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Mesenchymal stem cells or exosomes with fibrin glue mesh fixation modulates the inflammatory reaction in a murine model of incisional hernia

Javier García Casado, Scientific Director of NANBIOSIS U14, Cell Therapy Unit, and Francisco Miguel Sánchez Margallo, Scientific Director of  CCMIJU, are co-author of the publication “Fibrin glue mesh fixation combined with mesenchymal stem cells or exosomes modulates the inflammatory reaction in a murine model of incisional hernia” by Acta Biomaterialia.

In vitro experiments were performed by the ICTS Nanbiosis (Unit 14. Cell therapy at CCMIJU). Exosomes characterization was performed by the ICTS Nanbiosis (Unit 6: Biomaterial processing and Nanostructuring Unit). In vivo experiments were performed by the ICTS Nanbiosis (Unit 22. Animal housing at CCMIJU).

The study has demonstrated a significant increase of anti-inflammatory M2 macrophages and TH2 cytokines when MSCs or exo-MSCs were used. Moreover, the analysis of MMPs, TIMPs and collagen exerted significant differences in the extracellular matrix and in the remodeling process. The in vivo study suggests that the fixation of surgical meshes with FG and MSCs or exo-MSCs will have a beneficial effect for the treatment of incisional hernia in terms of improved outcomes of damaged tissue, and especially, in the modulation of inflammatory responses towards a less aggressive and pro-regenerative profil,

The implantation of surgical meshes is the standard procedure to reinforce tissue defects such as hernias. However, an exacerbated and persistent inflammatory response secondary to this implantation is frequently observed, leading to a strong discomfort and chronic pain in the patients. In many cases, an additional surgical intervention is needed to remove the mesh.

This study shows that mesenchymal stem cells and their exosomes, combined with a fibrin sealant, can be used for the successful fixation of these meshes. This new therapeutic approach, assayed in a murine model of incisional hernia, favors the modulation of the inflammatory response towards a less aggressive and pro-regenerative profile

For further information: DOI: https://doi.org/10.1016/j.actbio.2018.02.014.

 

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Stem cells for improving the biocompatibility of surgical meshes

JUMISC carried out an in vitro and in vivo study focused in the use of MSCs -coated surgical meshes to counteract the inflammatory response commonly observed after implantation.
Surgical meshes are medical devices traditionally used to solve hernias and prolapsed organs pathologies that may cause inflammation and foreign body reactions, causing pain and discomfort to the patient.
According to this, the JUMISC financed a R&D project to evaluate if MSCs may provide an anti-inflammatory environment after surgical implantation.
Magnetic resonance imaging, laparoscopic evaluation and histological studies were performed to evaluate safety aspects and its future clinical application as a bioactive material. The in vivo results demonstrated that they fulfill safety aspects and non-adverse effects.
The results have been published in Acta Biomaterialia, the second best journal in its area, whose authors are Rebeca Blázquez, Francisco Miguel Sánchez-Margallo, Verónica Álvarez, Alejandra Usón y Javier G. Casado. Moreover, according to the philosophy of JUMISC to promote the innovation and the quality of the patient life, from these results emerged an invention which is protected as a patent.
Finally, this project will continue and future experiments will be developed in a clinically relevant animal model for the extrapolation of the results to a clinical scenario.

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Images of the MSC-s coated surgical meshes obtained by microscopy

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