Revisiting biothermal effects on erythematous hypertrophic scars during pregnancy

Hydrogel Loaded with Components for Therapeutic Applications in Hypertrophic Scars and Keloids

Hypertrophic scars and keloids are common fibroproliferative diseases following injury. Patients with pathologic scars suffer from impaired quality of life and psychological health due to appearance disfiguration, itch, pain, and movement disorders. Recently, the advancement of hydrogels in biomedical fields has brought a variety of novel materials, methods and therapeutic targets for treating hypertrophic scars and keloids, which exhibit broad prospects. This review has summarized current research on hydrogels and loaded components used in preventing and treating hypertrophic scars and keloids. These hydrogels attenuate keloid and hypertrophic scar formation and progression by loading organic chemicals, drugs, or bioactive molecules (such as growth factors, genes, proteins/peptides, and stem cells/exosomes). Among them, smart hydrogels (a very promising method for loading many types of bioactive components) are currently favoured by researchers. In addition, combining hydrogels and current therapy (such as laser or radiation therapy, etc.) could improve the treatment of hypertrophic scars and keloids. Then, the difficulties and limitations of the current research and possible suggestions for improvement are listed. Moreover, we also propose novel strategies for facilitating the construction of target multifunctional hydrogels in the future.

The effect of Hypericum perforatum on the wound healing and scar of cesarean

OBJECTIVE

The aim of this study was to determine the effects of Hypericum perforatum on cesarean wound healing and hypertrophic scar.

DESIGN

This was a randomized, double-blind clinical trial study.

SETTING

The study was conducted in Samen-Ol-Aemmeh (Pbuh) Hospital in Mashhad, Iran.

SUBJECTS

The subjects included 144 women with surgical childbirth who had eligible criteria.

INTERVENTION

The participants were randomly assigned to three groups. The treatment and placebo groups applied H. perforatum or placebo ointment 3 times a day for 16 days based on consecutive coded ointments. The control group remained without any intervention postoperatively.

ASSESSMENT

Wound healing was assessed on the 10th day postcesarean using the REEDA scale (REEDA stands for redness, edema, ecchymosis, discharge, and approximation), which had criteria including redness, edema, ecchymosis, discharge, and approximation. On the 40th day, the degree of scarring was assessed using the Vancouver scar scale including pigmentation, height, pliability, and vascularity. The subjects were also asked some questions about pain by using the Visual Analogue Scale and pruritus of scar.

RESULTS

The mean age of all the study subjects was 23.50 +/- 4.03 and mean parity was 1.23 +/- 0.48. There were significant differences in wound healing on the 10th day (p < 0.005) and scar formation on the 40th day postpartum (p < 0.0001) between treatment group with placebo and control groups. However, the placebo group had no differences in wound healing (p = 0.93) and scar formation (p = 0.11) with the control group. In addition, significantly lower pain and pruritus were reported by the treatment group compared with the placebo and control groups on the 40th day postpartum.

CONCLUSIONS

Topical application of H. perforatum is safe and can facilitate cesarean wound healing and minimize formation of scar and its pain and pruritus.

High resolution skin colorimetry, strain mapping and mechanobiology

SYNOPSIS

Skin colours are notoriously different between individuals. They are governed by ethnicities and phototypes, and further influenced by a variety of factors including photoexposures and sustained mechanical stress. Indeed, mechanobiology is a feature affecting the epidermal melanization. High-resolution epiluminescence colorimetry helps in deciphering the effects of forces generated by Langer's lines or relaxed skin tension lines on the melanocyte activity. The same procedure shows a prominent laddering pattern of melanization in striae distensae contrasting with the regular honeycomb pattern in the surrounding skin.