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In This Article

  • Summary
  • Abstract
  • Introduction
  • Protocol
  • Representative Results
  • Discussion
  • Acknowledgements
  • Materials
  • References
  • Reprints and Permissions

Summary

This protocol presents a device that produces PRP to boost the in vitro expansion of cells in a 100% autologous fibroblast culture system.

Abstract

There is currently great clinical interest in the use of autologous fibroblasts for skin repair. In most cases, culture of skin cells in vitro is required. However, cell culture using xenogenic or allogenic culture media has some disadvantages (i.e., risk of infectious agent transmission or slow cell expansion). Here, an autologous culture system is developed for the expansion of human skin fibroblast cells in vitro using a patient’s own platelet-rich plasma (PRP). Human dermal fibroblasts are isolated from the patient while undergoing abdominoplasty. Cultures are followed for up to 7 days using a medium supplemented with either fetal bovine serum (FBS) or PRP. Blood cell content in PRP preparations, proliferation, and fibroblast differentiation are assessed. This protocol describes the method for obtaining a standardized, non-activated preparation of PRP using a dedicated medical device. The preparation requires only a medical device (CuteCell-PRP) and centrifuge. This device is suitable under sufficient medical practice conditions and is a one-step, apyrogenic, and sterile closed system that requires a single, soft spin centrifugation of 1,500 x g for 5 min. After centrifugation, the blood components are separated, and the platelet-rich plasma is easily collected. This device allows a quick, consistent, and standardized preparation of PRP that can be used as a cell culture supplement for in vitro expansion of human cells. The PRP obtained here contains a 1.5-fold platelet concentration compared to whole blood together, with a preferential removal of red and white blood cells. It is shown that PRP presents a boosting effect in cell proliferation compared to FBS (7.7x) and that fibroblasts are activated upon PRP treatment.

Introduction

Regenerative medicine aims to heal or replace tissues and organs damaged by age, disease, or trauma as well as correct congenital defects. In autologous therapy, cells or tissue are withdrawn from a patient, expanded or modified, then reintroduced to the donor. This form of therapeutics has broad potential in the field of dermatology1. In autologous fibroblast therapy, a patient’s fibroblasts are cultured and reinjected to treat wrinkles, rhytids, or acne scars. As fibroblasts are the main functional cells in the dermis, injection of autologous fibroblasts may be more beneficial than other therapies in facial rejuvenation

Protocol

The study protocol complied with the Declaration of Helsinki, and all patients provided written informed consent before participating in the study. Skin samples are obtained from healthy women undergoing abdominoplasty in the Plastic, Reconstructive and Aesthetic Surgery Department at Geneva University Hospitals (Geneva, Switzerland). The procedure conforms to the principles of the Declaration of Helsinki and was approved by the local institutional ethics committee (protocol #3126).

1. Preparati.......

Representative Results

This patented technology is a simple, fast, and reproducible medical device used to produce standardized PRP preparations. It is a one-step, fully closed system that allows the preparation of PRP from venous whole blood after 5 min of centrifugation at 1,500 x g (due to the separating gel technology). The PRP obtained after centrifugation is cleared from red and white blood cells, which sit below the gel. After several tube inversions, the platelets that are on top of the gel are resuspended in the plasma, and t.......

Discussion

The advantages of using autologous fibroblasts as a natural alternative compared to other filler materials in wound cell therapy include good biocompatibility, minimal side effects, and easiness of harvesting and use. However, before using these therapeutics in a daily clinical setting, proper preclinical studies are necessary to identify the growth features and assess the biological function and safety of isolated fibroblasts both before and after transplantation. Thus, directly after the isolation process, in vitro exp.......

Acknowledgements

We thank Mr Grégory Schneiter for technical assistance with flow cytometry data; Professor Muriel Cuendet (Laboratory of Pharmacognosy, School of Pharmaceutical Sciences, and University of Geneva) for allowing the use of the Attune flow cytometer and the Cytation 3 high-throughput microscope; Professor Brigitte Pittet for scientific advices.

....

Materials

NameCompanyCatalog NumberComments
96 well black clear flat bottomBD Falcon35321932/case
Cell trace Violet DyeThermo Fischer ScientificC34557180 assays
CuteCell PRPRegen Lab SACC-PRP-3T3 tubes per package
DAPISigmaD95421 mg
DMEMGibco52400-025500 mL
FBSGibco10270106500 mL
Glutamine 200 mMGibco25030024100 mL
Hematology CounterSysmexKK-21N
Heparin 5000E LiquemineDrossapharm AG0.5 mL
HEPES Buffer Solution 1MGibco15630-056100 mL
Liberase DHRoche54010540012x 5 mg per package
MEM NEAA 100xGibco11140-035100 mL
Na Pyruvate 1mg/mLGibco11360-039100 mL
Penicillin streptomycinGibco15140122100 mL
Phalloidin alexa Fluor 488Molecular ProbesA12379300 units
RPMIGibco31966-021500 mL
Trypsin 1x 0.25%Gibco25050-014100 mL
Trypsin EDTA 0.25%Gibco25200056100 mL

References

  1. Kumar, S., Mahajan, B. B., Kaur, S., Singh, A. Autologous therapies in dermatology. The Journal of Clinical and Aesthetic Dermatology. 7 (12), 38-45 (2014).
  2. Martin, I., et al. The survey on cellular and engineered tissue therapies in Europe in ....

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