Sustainable Alternatives to Petroleum-Derived Excipients in Pharmaceutical Oil-in-Water Creams.

Recently, vast efforts towards sustainability have been made in the pharmaceutical industry. In conventional oil-in-water (O/W) cream formulations, various petroleum-based excipients, namely mineral oil and petrolatum, are commonly used. Natural or synthetic excipients, derived from vegetable sources, were explored as alternatives to petroleum-based excipients in prototype topical creams, with 1% (w/w) lidocaine. A conventional cream comprised of petroleum-derived excipients was compared to creams containing sustainable excipients in terms of key quality and performance attributes, physicochemical properties, and formulation performance. The petrolatum-based control formulation had the highest viscosity of 248.0 Pa·s, a melting point of 42.7°C, a low separation index at 25°C of 0.031, and an IVRT flux of 52.9 µg/cm2/h. Formulation SUS-4 was the least viscous formulation at 86.9 Pa·s, had the lowest melting point of 33.6°C, the highest separation index of 0.120, and the highest IVRT flux of 139.4 µg/cm2/h. Alternatively, SUS-5 had a higher viscosity of 131.3 Pa·s, a melting point of 43.6°C, a low separation index of 0.046, and the lowest IVRT flux of 25.2 µg/cm2/h. The cumulative drug permeation after 12 h from SUS-4, SUS-5, and the control were 126.2 µg/cm2, 113.8 µg/cm2, and 108.1 µg/cm2, respectively. The composition of the oil-in-water creams had influence on physicochemical properties and drug release; however, skin permeation was not impacted. Sustainable natural or synthetic excipients in topical cream formulations were found to be suitable alternatives to petroleum-based excipients with comparable key quality attributes and performance attributes and should be considered during formulation development.

A Comparative Observation on Wound Healing After Surgery for Necrotizing Fasciitis: Kangfuxin Liquid Gauze versus Vaseline Gauze.

Objective: To evaluate the effectiveness of Kangfuxin Liquid (a traditional Chinese medicine) gauze and Vaseline gauze in wound healing after necrotizing fasciitis surgery. Method: The study was conducted at The First Affiliated Hospital of Baotou Medical College between February 2020 and February 2022. A total of 54 patients diagnosed with necrotizing fasciitis were randomly assigned to the Vaseline gauze group as the control group, and the Kangfuxin Liquid gauze group as the experimental group. Various aspects of treatment efficacy, wound healing conditions, healing indicators, pain scores, inflammation markers, and adverse reactions were compared between the two groups. Results: The total effective rate in the experimental group (100.00%) was significantly higher than that in the control group (77.78%), with a statistically significant difference The experimental group showed lower scores for secretion, granulation tissue morphology, redness, and swelling compared to the control group, with statistical significance. Additionally, the experimental group exhibited faster slough separation, new epidermis formation, and overall wound healing compared to the control group, with statistical significance. Visual analog scale (VAS) scores on postoperative days 3, 7, 9, and 14 were significantly lower in the experimental group than in the control group. Before treatment, there was no statistically significant difference in the levels of interleukin-17 (IL-17), interleukin-6 (IL-6), and tumor necrosis factor-alpha (TNF-α) between the two groups. However, after treatment, both groups exhibited a decrease in inflammatory markers, and the experimental group had significantly lower levels of IL-17, IL-6, and TNF-α compared to the control group). Furthermore, the incidence of adverse reactions in the experimental group (3.70%) was significantly lower than that in the control group (22.22%). Conclusion: The utilization of Kangfuxin Liquid gauze in wound healing after necrotizing fasciitis surgery effectively promotes wound healing, provides precise therapeutic effects, significantly reduces patient pain, improves inflammation, and exhibits minimal adverse reactions, thus demonstrating high safety. Therefore, the application of Kangfuxin Liquid gauze in this clinical context is highly recommended.

Investigating the role of Zibai ointment on apoptosis-related factors Bcl-2 and Bax in wound healing after anal fistula surgery.

OBJECTIVE: In this study, we investigated the impact of Zibai ointment on wound healing by analyzing the expression levels of two key apoptosis-related factors-B-cell lymphoma 2 (Bcl-2) and Bcl-2-associated X protein (Bax), in patients following surgery for anal fistula. METHODS: We included 90 patients with anal fistulas who were treated in the People's Hospital Affiliated to Fujian University of Traditional Chinese Medicine. Patients were randomly assigned to receive treatment with Zibai ointment (n = 45) or petroleum jelly (n = 45). The levels of apoptosis-related factors Bcl-2 and Bax were evaluated using enzyme-linked immunosorbent assay (ELISA), while cell apoptosis was assessed using Terminal deoxynucleotidyl transferase (TdT) dUTP Nick-End Labeling (TUNEL) assay. RESULTS: The results of ELISA showed that on Day 21 after the surgery, the levels of Bcl-2 and Bax in the Zibai ointment group were significantly different compared to the petroleum jelly group, with values of (60.11 ± 1.31) ng/mL and (7.05 ± 0.01) versus (83.79 ± 1.74) ng/mL and (6.00 ± 0.05) ng/mL, respectively (p < .05). Furthermore, light microscopy revealed a large number of apoptotic cells within the field of vision 14 days postsurgery in the Zibai ointment group, and the healing time in the Zibai ointment group was significantly different from that in the petroleum jelly group (p < .05). CONCLUSION: We found that Zibai ointment effectively promoted wound healing in patients following anal fistula surgery, possibly by regulating Bcl-2 and Bax apoptosis-related factors.

A review on PUVA pricks-A debilitating adverse event.

PURPOSE: PUVA phototherapy is indicated for various dermatological conditions. Adverse events due to PUVA phototherapy are seen in a sizable number of patients and can result in therapy cessation. This review will focus on PUVA pricks, an adverse event first reported by Tegner in 1979. METHODS: Articles were retrieved from PubMed starting from January 1979 until February 2021 yielding 1228 unique articles. Articles were included when they described individual patient characteristics, and patients were treated with PUVA therapy. RESULTS: After screening, 33 patients were extracted from 9 articles, published between 1979 and 2005. CONCLUSION: PUVA pricks are paroxysmal episodes of burning or prickling pain, akin to peripheral neuropathy of the unmyelinated C-fibers. Increased excitability of TRPV1 and TRPA1 channels while under PUVA therapy might be a contributing factor. Effective topical treatment options for PUVA pricks are capsaicin 8% cream, urea 4%, or petrolatum emollients. Antiepileptics such as phenytoin, clonazepam, and gabapentin are acceptable oral treatment options. A possible role of N-acetylcysteine in the prevention of PUVA pricks is discussed, though further research is required.

Maintaining Skin Integrity in Neonates with Sunflower Seed Oil and Liquid Vaseline: A Prospective Randomized Controlled Study.

OBJECTIVE: To test the effectiveness of sunflower seed oil (SSO) and liquid Vaseline (LV) in maintaining skin integrity in term and preterm neonates in the neonatal ICU. Because the skin of the neonate is still immature, disruption of skin integrity is a commonly observed problem. METHODS: In this randomized controlled study, 90 preterm and term neonates in the neonatal ICU of a state hospital were equally divided into three groups. The skin condition of the neonates in all three groups was assessed using the Neonatal Skin Condition Score (NSCS); assessments were made a total of nine times at 48-hour intervals. The skin of the neonates in the first group was moisturized with SSO, and the second group was moisturized with LV, once a day, a total of 16 times. Moisturizer was not applied to the skin of the third group of neonates (the control group). RESULTS: The median gestational age was 37.0 weeks (range, 36.0-38.0 weeks). After the third evaluation, the median NSCS scores for the neonates in the SSO and LV groups were significantly lower than for those in the control group (P < .001). The control group's median NSCS scores did not change throughout the period of the study. CONCLUSIONS: Both SSO and LV are harmless to the skin of neonates and can be used to maintain their skin integrity. More advanced studies are needed to evaluate the effects of topical oils on maintaining skin integrity.

Treatment of chronic plaque psoriasis with herbal Unani formulations: A randomized control trial of efficacy and safety.

ETHNOPHARMACOLOGICAL RELEVANCE: Psoriasis, despite modern therapeutic options, is incurable and recurrent. In Unani (Greco-Arab) medicine, many medications and formulations have been prescribed by eminent scholars for conditions clinically similar to psoriasis, though empirical evidence is sparse. Hence, the experimental formulations ItrifalShahtra and MarhamHina were chosen to be compared to the standard therapies PUVAsol and petrolatum for their safety and efficacy. MATERIALS AND METHODS: This open-label, randomized control clinical trial was conducted on 66 male and female participants with chronic plaque psoriasis, ranging in age from 18 to 65 years. In each group, 33 participants were block randomized to either receive Unani formulations or control drugs for 12 weeks. The Unani group received oral Itrifal Shahtra (a semisolid paste) and topical MarhamHina (an ointment) twice daily, and the control group received oral 8-methoxypsoralen and topical petroleum jelly for local application. Participants of both groups were advised to get daily sunlight exposure for 5-15 min. The primary outcome measure was the change in psoriasis area and severity index (PASI) assessed at each visit. Secondary outcome measures were patient global assessment on a 100 mm VAS applied at baseline and after 12 weeks of treatment and change in subjective parameters including erythema, induration, scaling, and itching, assessed on a 5-point scale at every visit. Hemogram, LFTs, RFTs, CXR, ECG, urine, and stool tests were all assessed at baseline and after treatment for the safety of the drugs. RESULTS: The per-protocol analysis was done on 25 participants in each group. The mean ± SD of the psoriasis area severity index (PASI) significantly decreased from 27.88 ± 12.01 and 23.61 ± 9.79 at baseline to 5.01 ± 4.59 and 9.85 ± 7.16 after completion of the trial therapies in both Unani and control groups, respectively. Also, the test formulations outperformed the control drugs on clinically significant endpoints, PASI 50 and PASI 75, with all 25 participants achieving PASI 50 and 76% achieving PASI 75. CONCLUSION: The trial formulations, ItrifalShahtra and MarhamHina may be superior to control drugs PUVAsol and petrolatum in terms of safety, efficacy, and tolerability in the treatment of chronic plaque psoriasis. Thus, the Unani formulations may further be evaluated in a well-designed multicentric superiority trial with an adequate sample size.

Skin occlusive performance: Sustainable alternatives for petrolatum in skincare formulations.

BACKGROUND: The emollients are important ingredients used in skincare formulations that can act as moisturizing agents through their occlusive potential, preventing skin water loss. Consumer interest in natural and sustainable products has grown considerably in the last few years, requiring efforts from the cosmetic industry to design products with raw materials of natural, organic, and sustainable origin. Thus, it is essential to improve the knowledge about the behavior of cosmetic raw materials that can be used as sustainable alternatives to synthetic ingredients. AIM: This work aimed to evaluate the occlusive performance of different vegetable oils used as emollients in skincare cosmetics, through comparative analysis with petrolatum, a synthetic emollient with a high occlusive skin potential. METHOD: The study included 80 healthy female adult volunteers. TEWL measurements were performed before and after 15 min, 2 and 6 h of emollients application on the forearms of the research participants. All research participants provided written informed consent. RESULTS: The results obtained showed that the vegetable oils were effective in providing an occlusive effect on the skin. When compared to the petrolatum, the vegetable oils did not provide a high immediate skin occlusion effect. However, most of them showed a skin occlusion performance comparable to petrolatum throughout the 6 h time course. CONCLUSION: Vegetable oils can be used as a sustainable alternative to synthetic emollients, and they are promising in replacing petrolatum in skincare formulations with respect to the occlusion effect of the skin. The vegetable oils did not provide a high immediate skin occlusion effect (15 min post-application) as the petrolatum, which is known to have increased occlusion properties. However, most of them showed a skin occlusion performance comparable to petrolatum throughout the 6-hour time course.

Efficacy of a Natural Topical Skin Ointment for Managing Split-Thickness Skin Graft Donor Sites: A Pilot Double-blind Randomized Controlled Trial.

OBJECTIVE: To evaluate the safety and efficacy of a new topical skin ointment with natural ingredients (aloe vera, honey, and peppermint) for dressing skin graft donor sites. DESIGN: A double-blind, placebo-controlled, randomized clinical trial. PATIENTS AND INTERVENTION: Researchers enrolled patients who were referred for split-thickness skin graft after burns or surgical wounds on the scalp or face area. For each patient, a thin layer of skin (depth, 0.04 mm; approximate size, less than 15 × 7 cm) was harvested from the thigh by a plastic surgeon with an electric or manual dermatome. The donor sites were divided and randomized to receive either natural ointment or petroleum jelly as a topical agent to dressing. Topical agents were applied on donor site wounds on days 0, 4, 7, and 14. MAIN OUTCOME MEASURES: Wound size, pain, erythema, pruritus, patient discomfort, complications, and physician satisfaction were evaluated at each visit. MAIN RESULTS: Among 28 patients, there was no significant difference between the two treatment agents regarding the rate of wound healing (P = .415), pain (P = .081), pruritus (P = .527), and patient discomfort (P = .616). The ointment was superior to petroleum jelly in reducing wound erythema (P = .001) and was associated with significantly better treatment satisfaction (P < .001). CONCLUSIONS: The natural topical ointment investigated in this study may be an acceptable alternative to petroleum jelly in caring for split-thickness donor skin graft donor site wounds to effectively promote wound healing, prevent infection and scarring, reduce pain, and comfort the patient.

Use of autologous platelet-rich plasma in healing skin graft donor sites.

OBJECTIVE: To demonstrate that the use of platelet-rich plasma (PRP) enhances both the quality of healing and the time required for wound healing at a skin graft donor site. METHODS: Patients who had dermo-epidermal skin grafts taken from the thigh area were included in a prospective, randomised clinical study. PRP was applied to one donor site and then covered with Vaseline-impregnated, open-weave gauze and gauze, while the contralateral donor site on the other thigh served as a control and was covered with the open-weave gauze and gauze without PRP. RESULTS: A total of 24 patients took part in the study, of which three developed infections and were thus removed from the study. Use of PRP reduced the wound healing time of the dermo-epidermal graft donor sites by a mean 17.8% and median 18 days. On average, the treated donor sites healed in 14.9 days compared with 18.4 days for the control group. The median was 14 days compared with 18 days in the control group (p=0.026). In one patient, healing was slower on the side where PRP was applied. In 20 patients, healing of the donor site was accelerated where PRP was applied. CONCLUSION: The study demonstrated a beneficial effect of PRP, as healing time was shortened. Using PRP to heal wounds could be beneficial for patients for whom commonly available wound healing therapies have failed, as well as for high-risk patient groups for whom problematic wound healing may be expected.

Effect of Topical Garlic on Wound Healing and Scarring: A Clinical Trial.

BACKGROUND: Historically, garlic containing compounds have been used on wounds to improve healing and ward off infection. Researchers have tested many of these ancient ointments, discovering that garlic is a common ingredient in those that are effective. OBJECTIVE: To determine the efficacy of topical garlic on surgical wounds compared with Vaseline by analysis of visual analog scales and digital photograph analysis. MATERIALS AND METHODS: Seventeen patients with 2 skin excisions applied a 30% garlic ointment to one surgical wound and Vaseline to the other surgical wound twice daily. They were followed up at 2 weeks and 4 weeks post-op. Digital photographs were taken of the sites, and wound visual analog scales were filled out by the patient and the physician. RESULTS: Patients and the onsite physician stated the garlic site healed better in 59% and 65% of the wounds, respectively, at 2 weeks. At 4 weeks, the patients and the onsite physician stated the garlic site healed better in 76% and 88% of wounds, respectively. Digital photograph analysis revealed less erythema at the garlic sites (p-value = .02). CONCLUSION: Surgical wounds treated with 30% garlic ointment healed with more cosmetically appealing scars than the Vaseline-treated sites.

The Effect of Lauric Acid on Pathogens Colonizing the Burn Wound: A Pilot Study.

OBJECTIVE: Some of the most serious complications of burns include septic infections. Instead of fulfilling the function of a protective barrier, tissues damaged by high temperature create a niche that serves as an environment and source of nourishment for pathogens. An accepted practice is to use antibiotics to inhibit development of pathogens. Taking into consideration the characteristics of the burn wound and increasing antibiotic resistance, the search for new substances that have both antimicrobial and regenerative effects seems justified. The aim of the study was to determine the influence of lauric acid on bacteria-colonizing tissue samples taken during surgical treatment of burns. METHODS: Lauric acid was combined with 5 different ointment bases: Anhydrous Eucerin DAB, Anhydrous Eucerin II, Hydrophilic Vaseline, White Vaseline, and Lekobaza. The content of lauric acid in the ointment bases was 10% to 20% w/w. The preparations were applied onto samples of burnt skin collected during surgery. The samples were subsequently subjected to a microbiological test with the use of model strains of Pseudomonas aeruginosa, Staphylococcus aureus, and Escherichia coli. RESULTS: With one exception (White Vaseline), lauric acid showed a more pronounced effect on bacteria in 20% w/w concentration. In a 10% lauric acid concentration, no effect on bacteria was observed on the Hydrophilic Vaseline ointment base. Lauric acid had the strongest inhibiting effect on microbial growth of Gram-positive Staphylococcus aureus. Satisfactory zones of inhibition were also observed in the case of Escherichia coli. Growth inhibition of Pseudomonas aeruginosa was observed only when pure lauric acid was used. CONCLUSIONS: Due to its aseptic and regenerative effect on chemically damaged tissues, lauric acid can be a promising modifier of the burn healing process.

Randomized, single-blinded, crossover study of a novel wound dressing vs current clinical practice after percutaneous collagen induction therapy.

INTRODUCTION: Skin rejuvenation procedures have become common with sophisticated technologies with reduced downtime and related risks. Recently, microneedling has been paired with radiofrequency to create Fractional Radiofrequency Microneedling (FRFM) to induce neocollagenesis. Frequently, topical products are applied immediately after the needling. This procedure is known as percutaneous collagen induction therapy (PCIT). Postoperative topical wound care is critical for prompt rapid and safe healing, with moist wound healing deemed of primary importance for fast and correct scarring process. An ideal dressing enables a moist environment while reducing postprocedural inflammatory responses in the first stages of wound healing. OBJECTIVE: To evaluate whether an innovative silicone-based wound dressing is superior than standard of care therapy in decreasing severity and duration of treatment-site acute inflammatory reactions post PCIT. MATERIALS AND METHODS: Endymed PRO Intensif Handpiece (Endymed, Israel) was used for the full-face FRFM procedure. Subjects (n = 20) applied treatment (Stratacel® -Stratpharma SG, Switzerland) and control (Aquaphor® -Beiersdorf Inc, USA) immediately after the procedure and daily; they were evaluated immediately postprocedure (baseline assessment), at 2, 3 and 7 days postprocedure. Digital and 3D pictures (Antera 3D Camera for Skin Analysis-Miravex, Ireland) were taken at each assessment. RESULTS: All patients healed properly without reporting adverse reactions to any of the studied products. Erythema at each study visit was significantly reduced with the use of the novel wound dressing (P < 0.001). A statistically significant difference in favor of the innovative wound dressing also emerged with respect to the patient-rated product properties (P = 0.008), such as feel on skin, drying time and stickiness. CONCLUSIONS: The novel wound dressing reduced signs of acute inflammation following PCIT when compared to standard of care, without reporting adverse events and resulting in a more favorable outcome from a patient perspective.

In vitro skin penetration of petrolatum and soybean oil and effects of glyceryl monooleate.

OBJECTIVES: Petrolatum and soybean oil are common ingredients incorporated in topical skin formulations for skin protection and moisturization. However, the stratum corneum (SC) penetration kinetics of these two cosmetic ingredients has not been systematically studied. Glyceryl monooleate (GlyMOle) has been shown to enhance skin penetration of various compounds. It was hypothesized that GlyMOle could enhance skin penetration of petrolatum and soybean oil. This study aimed to examine the in vitro skin penetration of petrolatum and soybean oil in the presence or absence of GlyMOle. METHODS: Skin permeation experiments were conducted using the in vitro Franz diffusion cell model with split-thickness human skin and human epidermal membrane (HEM). The effect of permeant dose and the kinetics of permeant penetration were examined with and without GlyMOle in vitro. RESULTS: Petrolatum and soybean oil were found to permeate across HEM, and no effect of GlyMOle on skin permeation into the receptor chamber was observed. GlyMOle enhanced the penetration of petrolatum into the split-thickness skin at 50 µg dose (petrolatum:GlyMOle, 49 : 1, w/w). However, no effect of GlyMOle on petrolatum penetration was observed at 200 µg dose (of the same petrolatum:GlyMOle ratio), indicating a dose-dependent effect. GlyMOle at the level used in the study did not enhance the penetration of soybean oil with 50 and 200 µg doses at any timepoints. CONCLUSION: GlyMOle was a skin penetration enhancer for petrolatum under the in vitro conditions identified in this study.

Blocking or enhancing effects of some basic emollients in UVA penetration.

BACKGROUND: Topical agents used in combination with phototherapy or photochemotherapy may have both blocking or enhancing effects in ultraviolet rays. OBJECTIVE: In this in vivo study, the effects of topical petrolatum, basis cream, glycerine, and olive oil on the transmission of ultraviolet A radiation were investigated. METHODS: A test was performed to determine the minimal phototoxic dose on 29 volunteers with only psoralen plus ultraviolet A (PUVA) and then the same test was repeated with white petrolatum, basis cream, glycerine, olive oil, and sunscreen (0.3cc/25cm2). The effects of each agent on the minimal phototoxic dose were determined after 72 h. RESULTS: When compared to pure PUVA, there was a statistically significant increase in the mean minimal phototoxic dose values by the application of white petrolatum (P = 0.011), but there was no significant increase or decrease in the mean minimal phototoxic dose values after the application of basis cream (P = 0.326), glycerine (P = 0.611) or olive oil (P = 0.799). STUDY LIMITATIONS: Low number of patients Conclusion: The application of white petrolatum, which has a blocking effect, and also of basis cream immediately before PUVA therapy should not be recommended. Although we specify that glycerine and maybe olive oil can be used before photochemotherapy, there is a need for further research in larger series.

Blocking or enhancing effects of some basic emollients in UVA penetration

Abstract: Background: Topical agents used in combination with phototherapy or photochemotherapy may have both blocking or enhancing effects in ultraviolet rays. Objective: In this in vivo study, the effects of topical petrolatum, basis cream, glycerine, and olive oil on the transmission of ultraviolet A radiation were investigated. Methods: A test was performed to determine the minimal phototoxic dose on 29 volunteers with only psoralen plus ultraviolet A (PUVA) and then the same test was repeated with white petrolatum, basis cream, glycerine, olive oil, and sunscreen (0.3cc/25cm2). The effects of each agent on the minimal phototoxic dose were determined after 72 h. Results: When compared to pure PUVA, there was a statistically significant increase in the mean minimal phototoxic dose values by the application of white petrolatum (P = 0.011), but there was no significant increase or decrease in the mean minimal phototoxic dose values after the application of basis cream (P = 0.326), glycerine (P = 0.611) or olive oil (P = 0.799). Study limitations: Low number of patients Conclusion: The application of white petrolatum, which has a blocking effect, and also of basis cream immediately before PUVA therapy should not be recommended. Although we specify that glycerine and maybe olive oil can be used before photochemotherapy, there is a need for further research in larger series.

Advanced film-forming gel formula vs spring thermal water and white petrolatum as primary dressings after full-face ablative fractional CO2 laser resurfacing: a comparative split-face pilot study.

BACKGROUND: Aesthetically pleasing results and fast, uneventful recovery are highly desirable after rejuvenating ablative laser procedures. Wound dressings following ablative laser procedures should ideally improve and optimize the wound healing environment. OBJECTIVE: The purpose of this comparative split-face, single-blinded, prospective observational study was to assess the efficacy and acceptability of two primary wound dressings immediately after a full-face fractional CO2 laser resurfacing procedure. METHODS: The assessments of an innovative film-forming dressing called Stratacel (SC) vs spring thermal water + Vaseline (V+) were conducted after a standardized, single-pass, full-face ablative fractional CO2 laser skin resurfacing procedure. Clinical parameters, such as haemoglobin - HB; surface temperature - ST; micro-textural modifications - MT; superficial melanin - M; intrafollicular porphyrins - P, were assessed at different phases of the healing process using standardized, non-invasive technologies. RESULTS: Five female volunteers were enrolled in this inpatient, controlled pilot study. Most of the clinical parameters considered, including 3D surface texture analysis, revealed a better performance of SC vs. V+ during the early, more delicate phases of the healing process. CONCLUSIONS: This preliminary study, even if performed on a small number of volunteers, confirmed a definite advantage of the tested semipermeable film-forming formula (SC) over a more conventional postoperative skin care regime (V+). Clinical results could be explained by a better uniformity of distribution of SC over the micro-irregularities induced by ablative fractional CO2 laser resurfacing. Its thin, semipermeable film might, in fact, act as an efficient, perfectly biocompatible, full contact, temporary skin barrier, able to protect extremely delicate healing surfaces from potential environmental irritations.

In vitro method to evaluate the barrier properties of medical devices for cutaneous use.

Barrier creams (BC) are marketed as cosmetic products or locally-applied medical devices to protect skin against damages induced by chemical agents or physical insults. However, the determination of the BC effectiveness is still a matter of discussion at both the clinical and the regulatory level. In this context, this work aimed at the development of a reliable, reproducible and easy-to-perform experimental protocol for the evaluation of BC performances. Preliminarily, an in vivo method based on the measurement of trans-epidermal water loss had been matter of investigation and was discarded: it required too much time and was not robust and sensitive enough. In vitro, reduction of the permeation of caffeine (used as a model of irritant), through an epidermal membrane mounted on a Franz cell or through a reconstructed 3D human epidermis model, was evaluated. Six BC among oil in water (O/W) or water in oil (W/O) creams were investigated with respect to the petrolatum, which is an efficient impermeable barrier against hydrophilic molecules. Despite minor differences, both methods could rate the effectiveness of the tested products in preventing caffeine exposure. Both methods enable to evaluate and quantify the BC effectiveness in a simple and fast manner. Their application may help regulatory agencies to prevent the marketing of ineffective products for the benefit of consumers.

EVALUATION OF CRUDE FLAXSEED (Linum usitatissimum L) OIL IN BURN WOUND HEALING IN NEW ZEALAND RABBITS.

BACKGROUND: Burns are among the most prevalent injuries in humans with high cost in health care and heavy prolonged or permanent physical, psychological and social consequences. Commercial antimicrobial creams and dressing agents are unsuccessful in healing deep burn wounds. MATERIALS AND METHODS: A study was conducted to assess the impact of crude linseed oil (LSO) topical application on burn wounds healing in rabbits in comparison with untreated wounds (NAT) and those treated with Vaseline gel (VAG) and Cicatryl-Bio ointment (CBO). By the 28th day post burning, skin biopsies were analyzed for histological and cytological lesions. The presence of various bioactive phytochemical groups in linseed was also screened. RESULTS: Phytochemical screening has resulted in high concentrations of flavonoids and terpenoids, low amounts of catechic tannins and total absence of alkaloids and saponosides. All along the trial, the rate of wounds contraction was found to be significantly higher in burns treated with LSO which had also a significant shorter healing period (26±5.89 days) as compared to the other treatments. LSO healed wounds included less inflammatory cells, complete epithelium regeneration with a reduced thickness of the new formed dermis, discreet fibrosis, enhanced neo-vascularization, increased number of collagen fibers, fibroblasts and many myofibroblasts. Additionally, no adverse effects of LSO on cicatrization process were recorded. CONCLUSION: These findings prove the safety and efficaciousness of linseed oil topical application in the therapy of burn wounds.

Effectiveness of topical clove oil on symptomatic treatment of chronic pruritus.

BACKGROUND: Pruritus is a frequent symptom in the general population and in many skin and systemic diseases. Its frequency demonstrates a high burden and an impaired quality of life. AIM: Assessment of the efficacy of topically applied clove oil alone in the treatment of chronic pruritus. METHODS: Fifty selected subjects diagnosed with chronic pruritus due to either hepatic, renal, or diabetic causes were studied and divided into two groups of 25 patients each. Group I patients were instructed to hydrate the skin and then apply topical clove oil while group II patients applied petrolatum topically by hand; this application was done on the areas of pruritus, twice daily and for 2 weeks. The severity of the itch was assessed and compared before and after the study by 5-D itch scale. The results were analyzed by SPSS. Statistical methods such as descriptive analysis, independent-samples t-test, paired-samples t-test, and chi-square were employed. RESULTS: There was a significant improvement regarding all studied individual parameters (5-D itch scale) for the clove oil users with no significance among petrolatum users. Comparison of 5-D itch scale total score between patients of group I and patients of group II favored the improvement following the use of clove oil than using placebo (P value>.05). CONCLUSION: The topical treatment of chronic pruritus with clove oils is effective, easy to use, safe, cheap, and more acceptable for whom topical and systemic treatments tend to be irritating, contraindicated, or less well tolerated.

Wound-healing promoting effect of total tannins from Entada phaseoloides (L.) Merr. in rats.

The healing of wounds has always provided challenges for the medical community whether chronic or acute. Modern and traditional medicine has proved that herbal medicine shown superiority over chemical drugs. Herein, we report an Entada phaseoloides (L.) Merr. extract with a total tannin content of 76.18% showed wound-healing promoting effect in rat model. We found significantly accelerated wound closure already on day 7 in animals treated with total Entada phaseoloides (L.) Merr. tannins (TEPT) as compared to vaseline treated controls (p<0.05). At day 15, histologically, the wounds in animals treated with TEPT were completely closed as compared to controls. In vitro, TEPT promotes fibroblast proliferation and migration into wounds of NIH3T3 with concentration range of 9.38-37.50µg/ml. TEPT also had an inhibitory action against Staphylococcus aureus with MBC of 1.5mg/ml and the result was further proved by transmission electron microscope. Thus, TEPT could promote wound shrinkage, improve healing rate and promote healing of infectious wounds in rats. And this effect may due to antibacterial activities and NIH3T3 cell pro-proliferative effect of the tannins compounds, which indicating that TEPT can be used as efficient treatment in traumatic injury.