chondroitin-sulfates and Cicatrix--Hypertrophic

Over the past two decades the treatment of hypertrophic scars and keloids has seen substantial changes due to the evolution of current and establishment of new conservative and surgical methods. This review gives an overview of the current research with respect to the multifactorial etiology and pathophysiology of keloids and hypertrophic scars, discusses conservative surgical treatment options and provides an outlook on novel treatment strategies.

Topics: Adult; Burns; Cell Proliferation; Child; Chondroitin Sulfates; Cicatrix, Hypertrophic; Collagen; Combined Modality Therapy; Diagnosis, Differential; Facial Injuries; Female; Free Tissue Flaps; Granulation Tissue; Humans; Keloid; Male; Microsurgery; Middle Aged; Plastic Surgery Procedures; Reoperation; Tissue Expansion Devices

Integra Artificial Skin, a biosynthetic dermal template, is well established in acute burn surgery. The aim of the study was to determine the role of Integra in the surgical treatment of postburn scars in a younger population. Between March 1998 and November 2004, 17 patients (n=17; mean age=13.15 years) underwent complete excision of hypertrophic scars or keloids (1-4% TBSA; extremities=47%, head/neck=35%, trunk=18%) with subsequent implantation of Integra for defect closure. Split thickness skin grafting (STSG) of the Integra-derived neodermis was performed 3 weeks after the first operation. Scar excision and primary Integra implantation was successful in all but one patient (94%) who (6%) needed reimplantation once. Integra's mean take rate was 99.7% for all primarily successful patients. Complications occurred in three patients (18%), including minor problems without long-term consequences in 12% (seroma formation), and major problems in 6% (hematoma formation). Take rate of STSG ranged from 50% to 100% (mean 94%). Functional and cosmetic long-term outcome showed results scored "excellent" in 53%, "good" in 36%, and "fair" in 11%. Comparison of pre- and postoperative findings revealed a significant functional improvement in all and a considerable cosmetic improvement in all but two patients. These results suggest that Integra is a valid new treatment modality for extensive burn scar revision in younger patients.

Topics: Adolescent; Burns; Child; Chondroitin Sulfates; Cicatrix, Hypertrophic; Collagen; Esthetics; Female; Humans; Keloid; Male; Plastic Surgery Procedures; Reoperation; Skin, Artificial; Treatment Outcome

Integra artificial skin (Integra) (Integra Life Sciences Corporation, Plainsboro, NJ) is increasingly used as a skin substitute in reconstructive surgery. However, reliable fixation to the wound bed, a factor of paramount importance for successful application, is often hard to achieve. The vacuum-assisted closure system (VAC; KCI, Switzerland), a well-established subatmospheric pressure device, might be of interest to overcome these problems because of its ability to conform to almost any surface. The goal of this study was to test whether negative pressure application yields reliable fixation of Integra in children undergoing reconstructive surgery.. Between 2001 and 2004, VAC was applied in 18 children (n = 18) aged 7 months to 16.5 years. All required reconstructive surgery with implantation of Integra covering 1% to 12% of the total body surface area. After Integra implantation, VAC was installed for 13 to 30 days.. The VAC fixation of Integra was successful in 17 patients (94.5%). The only failure (5.5%) occurred in a patient in whom negative pressure could not be maintained because of a lesion site susceptible to both dislodgement and infection (perianal region). Consequently, infection occurred, and Integra had to be removed.. These results demonstrate that VAC is a valid tool for reliable fixation of Integra in children undergoing even demanding reconstructive surgery.

Topics: Adolescent; Child; Child, Preschool; Chondroitin Sulfates; Cicatrix, Hypertrophic; Collagen; Female; Hamartoma; Humans; Infant; Male; Negative-Pressure Wound Therapy; Nevus, Pigmented; Plastic Surgery Procedures; Skin Neoplasms; Skin, Artificial

In our modern health system, the improvement of the medical care cannot come along with an increase of expenses. In this purpose, we tried to bring to light the medical and economic, direct and indirect, benefits which exist with the association of an artificial dermis, Integra, and negative pressure therapy as the vacuum assisted closure (VAC) for wound which would have been treated by Integra alone. While preserving the aesthetic and functional qualities obtained by the artificial dermis alone followed by a skin graft after 21 days of treatment, the association of the negative pressure allows to perform the skin graft after only 10 days of treatment. This gain of time is a financial economy for the medical centers which have to shorten the durations of stay to be profitable. The patient benefits of a shorter hospitalization and will manage to return to work earlier. The quality of the treatment is not only improved by the absentia of immobilization of the patient but also by the decrease of the complications and the infectious risks due to the use of artificial dermis. The results so obtained highlight that in spite of the initial expense caused by this association the advantages are such that the use of the artificial dermis alone will not have interest any more.

Topics: Abdomen; Adult; Chondroitin Sulfates; Cicatrix, Hypertrophic; Collagen; Elbow; Extremities; Female; Forearm; Humans; Male; Negative-Pressure Wound Therapy; Nevus, Pigmented; Plastic Surgery Procedures; Skin Neoplasms; Thoracic Wall; Treatment Outcome

Topics: Biocompatible Materials; Chondroitin Sulfates; Cicatrix, Hypertrophic; Collagen; Humans; Plastic Surgery Procedures; Recurrence

1. Samples of normal skin from four patients, post-burn hypertrophic scar from five patients and post-burn mature scar from six patients were analysed for hydroxyproline, water and uronic acid and extracted with guanidinium chloride to yield the proteoglycan pool. A large chondroitin sulphate proteoglycan and biglycan were purified from one hypertrophic scar biopsy and decorin from a normal skin biopsy, by ion-exchange chromatography, gel-filtration and hydrophobic interaction chromatography. These purified proteoglycans were used in an inhibition ELISA assay to estimate the quantities of each in the tissue samples. 2. Samples of post-burn hypertrophic scar had on average 30% less hydroxyproline, 12% more water and 2.4 times as much uronic acid as normal skin. These differences were all statistically significant, whereas the small differences between mature scars and normal skin were not. The content of decorin in hypertrophic scars was only 25% of that in normal skin whereas the large chondroitin sulphate proteoglycan and biglycan were each about 6-fold higher. The mature scars had slightly elevated levels of large chondroitin sulphate proteoglycan and biglycan and a reduced content of decorin compared with normal skin but these differences were not statistically significant. 3. The results suggest that aberrant proteoglycan metabolism is a significant factor contributing to the altered physical properties of hypertrophic scars and that maturation of post-burn scars is dependent on a return of the relative proportions and concentrations of proteoglycans to those characteristic of normal dermis.

Topics: Burns; Chondroitin Sulfates; Chromatography, Gel; Chromatography, High Pressure Liquid; Chromatography, Ion Exchange; Cicatrix, Hypertrophic; Decorin; Enzyme-Linked Immunosorbent Assay; Extracellular Matrix Proteins; Humans; Hydroxyproline; Proteoglycans; Skin; Uronic Acids; Water