Nanoemulsion Gel Research Articles

THE CHOICE OF COMPONENTS AND THE IMPACT OF SURFACTANTS AND CO-SURFACTANTS ON EPLERENONE NANOEMULSION SYNTHESIS FOR GEL-BASED TRANSDERMAL APPLICATION

Objective: This research aims to establish an efficient methodology for selecting nanoemulsion components to synthesize eplerenone nanoemulsion for gel-based transdermal applications. Methods: The chemical compatibility study of eplerenone was investigated by FTIR, DSC, and solubility in oils, surfactants, and co-surfactants as the criteria for choice. We used visual appraisal and grading to assess the effectiveness of emulsification. Various excipients were tested depending on solubility. The final appearance, dispersibility, and ease of emulsification were used to visually assess the degree of self-emulsification of oil and emulsifier in a 1:3 mass ratio. Co-surfactants were assessed by mixing particular emulsifiers in a 2:1 (w/w) ratio with co-surfactants, and the oily component was added at a 1:3 (w/w) ratio to evaluate Smix's emulsification potential. A central composite design synthesized, evaluated, and optimized eplerenone nanoemulsions. Optimized nanoemulsions were characterized after a thermodynamic stability study for droplet size, ζ potential, viscosity, refractive index, pH measurements, and TEM. All the selected formulations were found to be stable, and the droplet size was found to be<110 nm. Results: Eplerenone was chemically compatible, and its maximum solubility was 171.3±0.92 and 169.3±2.22 in Kollicream®OA and Paceol, respectively. The evidence impressively found that Tween 20 and Kolliphor®EL were discovered as active emulsifiers, and Transcutol®P was revealed to be a co-surfactant. Outcomes showed that the emulsification efficacy of Kolliphor®EL (3% w/w) was able to emulsify Kollicream®OA (1% w/w), and Paceol failed. As well, Smix [Kolliphor®EL (2% w/w) and Transcutol®P (1% w/w)] were able to emulsify Kollicream®OA (1% w/w). Conclusion: The main conclusion from this work is the application of a visual appraisal and grading system to assess the final appearance, dispersibility, and ease of emulsification to eradicate the toxicity and irritation that nanoemulsions can cause. Optimised nanoemulsions can further formulate eplerenone's nanoemulsion gel for transdermal application.

Colistin-niclosamide-loaded nanoemulsions and nanoemulsion gels for effective therapy of colistin-resistant Salmonella infections.

Colistin (COL) is regarded as a last-resort treatment for infections by multidrug-resistant (MDR) Gram-negative bacteria. The emergence of colistin-resistant Enterobacterales poses a significant global public health concern. Our study discovered that niclosamide (NIC) reverses COL resistance in Salmonella via a checkerboard assay. However, poor solubility and bioavailability of NIC pose challenges. In this study, we prepared a self-nanoemulsifying drug delivery system (SNEDDS) co-encapsulating NIC and COL. We characterized the physicochemical properties of the resulting colistin-niclosamide-loaded nanoemulsions (COL/NIC-NEs) and colistin-niclosamide-loaded nanoemulsion gels (COL/NIC-NEGs), assessing their antibacterial efficacy in vitro and in vivo. The COL/NIC-NEs exhibited a droplet size of 19.86 nm with a zeta potential of -1.25 mV. COL/NIC-NEs have excellent stability, significantly enhancing the solubility of NIC while also demonstrating a pronounced sustained-release effect. Antimicrobial assays revealed that the MIC of COL in COL/NIC-NEs was reduced by 16-128 times compared to free COL. Killing kinetics and scanning electron microscopy confirmed enhanced antibacterial activity. Antibacterial mechanism studies reveal that the COL/NIC-NEs and COL/NIC-NEGs could enhance the bactericidal activity by damaging cell membranes, disrupting proton motive force (PMF), inhibiting multidrug efflux pump, and promoting oxidative damage. The therapeutic efficacy of the COL/NIC-NEs and COL/NIC-NEGs is further demonstrated in mouse intraperitoneal infection models with COL-resistant Salmonella. To sum up, COL/NIC-NEs and COL/NIC-NEGs are a potentially effective strategies promising against COL-resistant Salmonella infections.

Augmentation of antifungal activity of fluconazole using a clove oil nanoemulgel formulation optimized by factorial randomized D-optimal design.

In the present study, fluconazole (FLU) showed the highest solubility in clove oil and was selected as the oil phase for the FLU-loaded nanoemulsion (FLU-NE). Among the studied cosurfactants, Labrafac was better than ethanol at providing globules with acceptable sizes and a lower polydispersity index (PDI) when Tween 80 was the surfactant. This optimized FLU-NE was thermodynamically stable. Furthermore, FLU-NE stored at 40 ± 2°C and 75 ± 5% relative humidity for 6months demonstrated good stability. The FLU-NE was converted to a FLU-loaded nanoemulsion gel (FLU-NEG) using 2% w/v sodium carboxymethyl cellulose. The FLU-NEG was acceptable in terms of visual appearance and spreadability. Rheological studies revealed pseudoplastic behavior for FLU-NEG. The viscosity of FLU-NEG decreased when the applied rpm was increased. FLU-NEG showed greater drug release than that from a FLU-GEL formulation. Furthermore, the FLU release from FLU-NEG followed the Higuchi model. The results from the in vitro antifungal evaluation of FLU-NEG on Candida albicans ATCC 76615 strain confirmed the increase in the antifungal activity of FLU by clove oil. Significant differences were observed in the zones of inhibition produced by FLU-NEG compared to those produced by the blank nanoemulsion gel (B-NEG), fluconazole suspension (FLU-SUS), and nystatin samples. Thus, the increase in the antifungal activity of FLU using clove oil as the oil phase in its nanoemulsion formulation was quite evident from our results. Therefore, the developed FLU-NEG could be considered a potential candidate for further preclinical and clinical studies.

Anti-aging effect of mustard and flax seed oils based nanoemulsion gel on aged rat skin through antioxidant and anti-inflammatory activity

Skin aging is a common issue that is linked to changes in skin physiology, hydration, and barrier function. Dietary fatty acids (FA), particularly poly-unsaturated fatty acids (PUFA), can influence skin characteristics. It is reported that a deficiency of fatty acids in the skin is associated with skin aging. Therefore, the goal of the current study is to evaluate the antiaging effect of flaxseed oil or mustard oil-based nanoemulsion gel rich in fatty acids such as omega 3 on D-galactose-induced skin aging. N-hexane was used to extract the oils of black mustard and flax seed from their seeds, and the oils' fatty acid composition was then determined. A full factorial design was created to assess the impact of three variables: oil type, oil concentration, and S:Cos ratio, on various responses: globule size, zeta potential, and emulsification time of the self-nanoemulsifying system. Additionally, the polydispersity index, transmittance percentage, refractive index, cloud point, and viscosity were also estimated. TEM of the optimized formulations revealed a spherical form of oil globules with nanosize. The values for the zeta potential ranged from -12 to -34.2 mV. The optimized formulations were incorporated into a hydroxypropyl methyl cellulose solution to form a nanoemulsion gel. Skin aging was induced using the D-galactose model, and the impact of topical skin application of the optimized formulation gels on different biomarkers such as amino acids, B5, oxidative stress markers, inflammatory mediators and histopathological examination was evaluated. The results showed a considerable improvement in the evaluated parameters of the treated groups when compared to the untreated D-galactose group. The findings suggest that the nanoemulsifying system utilizing high doses of fixed plant oils could serve as a promising vehicle for enhancing skin rejuvenation. Flaxseed oil formulation showed greater potential compared to mustard oil formulation as skin antiaging.

Therapeutic effects of chamomile volatile oil nanoemulsion/Bletilla striata polysaccharides gels on atopic dermatitis

Atopic dermatitis (AD) is a prevalent chronic skin condition characterized by complex immune responses. Chamomile possesses potent anti-inflammatory properties and has been widely used in treating various skin diseases. This study aimed to assess the therapeutic benefits of chamomile volatile oil nanoemulsion gels (CVO-NEGs) for the treatment of AD. Chamomile volatile oil nanoemulsions (CVO-NEs) were prepared using the phase transition method, yielding spherical nanoparticles with a particle size of 19.07 nm. Subsequently, Bletilla striata polysaccharides were employed to encapsulate CVO-NEs, resulting in the formation of CVO-NEGs. In vivo studies demonstrated that the preparation of CVO-NEGs enhanced the biological activity of volatile oil in AD therapy. Histopathological results indicated that CVO-NEGs reduced skin damage, epidermal thickness, and mast cell infiltration. CVO-NEGs suppressed IgG production and reduced the levels of cytokines, including TNF-α, IL-4, and IFN-γ, in AD mice. Furthermore, flow cytometry revealed that CVO-NEGs were involved in regulating the differentiation of CD4+ T cell subsets. The immune imbalance of Th1/Th2 in AD mice can be controlled, resulting in a reduction in the hypersensitivity reaction caused by excessive Th2 activation. In conclusion, the present study confirms that CVO-NEGs have the potential to serve as an effective alternative treatment for AD.

Development and evaluation of nanoemulsion gel loaded with bioactive extract of Cucumis melo var. agrestis: A novel approach for enhanced skin permeability and antifungal activity

The utilization of phytoconstituents in skin care products has emerged as a notable trend due to their recognized safety and therapeutic efficacy. However, the challenge lies in improving the effective delivery of phytoconstituents to specific tissues, primarily attributed to their poor solubility and low permeability. This study endeavors to address this challenge by developing, optimizing and characterizing Cucumis melo var. agrestis (CME) extract loaded nanoemulsion gel (CME-NEG), aiming to enhance the skin permeability and antifungal activity. Herein, nanoemulsions encapsulating the plant extract were prepared using ultrasonication technique and were characterized for droplet size, zeta potential, polydispersity index (PDI) and entrapment efficiency. Further, Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) analysis were conducted to characterize the optimized CME extract loaded nanoemulsion (CME-NE 3) formulation. The optimized formulation was blended with Carbopol 940 gel to develop CME-NEG, which was evaluated for release kinetics, in vitro permeation and in vitro antifungal activity. High performance liquid chromatography (HPLC) analysis confirmed the presence of gallic acid, chlorogenic acid, 4-Hydroxy benzoic acid (HB acid), kaempferol, caffeic acid and quercetin. Findings of 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay showed that the ethanolic extract had highest antioxidant activity (88.88 %). The optimized formulation displayed smooth spherical nanodroplets with size of 175.5 ± 1.56 nm, zeta potential of −21.5 ± 0.12 mV, PDI of 0.192 ± 0.06, and highest entrapment efficiency (EE) of 91.35 ± 1.65 %. The release profile of CME-NE exhibited a controlled release characteristic and the release kinetic mechanism was best described by the Korsmeyer-Peppas (Kp) model. In a 24 h permeation study, it was observed that the in vitro permeation of CME-NEG was 58.63 %, significantly higher than that of CME extract loaded plain gel (CME-PG) with an enhancement ratio of 2.12. The prepared CME-NEG formulation also presented enhanced antifungal activity as compared to pure CME extract. In conclusion, the designed CME-NEG offers a promising topical drug delivery system with enhanced skin permeability and antifungal activity.

Effective treatment of actinic keratosis on the hands with red light photodynamic therapy using BF-200 ALA

BackgroundAcral actinic keratosis (AK) lesions are considered difficult to treat, and published data for photodynamic therapy (PDT) on these lesions is limited. Thus, we evaluated sustained efficacy, safety, and satisfaction after PDT for AK on the hands. MethodsWe analysed subgroup data for treatment on the hands from a randomised, double-blind, intra-individual phase III study. All participants previously underwent up to two field-directed red light PDTs with 10 % 5-aminolevulinic acid nanoemulsion gel (BF-200 ALA). Assessments included pain during PDT, clearance and recurrence rates, and satisfaction. Results24 participants treated on the hands were included; 21 participants were analysed. Complete clearance rates with BF-200 ALA were 90.9 % (lesion-based) and 76.2 % (per participant's side), both markedly higher than with vehicle. The lesion recurrence rate with BF-200 ALA was 29.0 %. Adverse events reflected the mode of action. Mean pain intensities were 4.8 ± 3.8 (BF-200 ALA) and 0.8 ± 2.1 (vehicle) on an 11-point numeric rating scale. Most participants (81.0 %) rated their satisfaction with BF-200 ALA as very good or good. ConclusionThis subgroup analysis indicates that PDT with BF-200 ALA provides a suitable treatment for AK lesions on the hands.

Silk Fibroin Formed Bioadhesive Ophthalmic Gel for Dry Eye Syndrome Treatment.

Dry eye syndrome (DES), arising from various etiologic factors, leads to tear film instability and ocular surface damage. Given its anti-inflammatory effects, cyclosporine A (CsA) has been widely used as a short-term treatment option for DES. However, poor bioavailability and solubility of CsA in aqueous phase make the development of a cyclosporine A-based eye drop for ocular topical application a huge challenge. In this study, a novel strategy for preparing cyclosporine A-loaded silk fibroin nanoemulsion gel (CsA NBGs) was proposed to address these barriers. Additionally, the rheological properties, ocular irritation potential, tear elimination kinetics, and pharmacodynamics based on a rabbit dry eye model were investigated for the prepared CsA NBGs. Furthermore, the transcorneal mechanism across the ocular barrier was also investigated. The pharmacodynamics and pharmacokinetics of CsA NBGs exhibited superior performance compared to cyclosporine eye drops, leading to a significant enhancement in the bioavailability of CsA NBGs. Furthermore, our investigation into the transcorneal mechanism of CsA NBGs revealed their ability to be absorbed by corneal epithelial cells via the paracellular pathway. The CsA NBG formulation exhibits promising potential for intraocular drug delivery, enabling safe, effective, and controlled administration of hydrophobic drugs into the eye. Moreover, it enhances drug retention within the ocular tissues and improves systemic bioavailability, thereby demonstrating significant clinical translational prospects.

Preparation of Compound Salvia miltiorrhiza-Blumea balsamifera Nanoemulsion Gel and Its Effect on Hypertrophic Scars in the Rabbit Ear Model.

Hypertrophic scars (HS) still remain an urgent challenge in the medical community. Traditional Chinese medicine (TCM) has unique advantages in the treatment of HS. However, due to the natural barrier of the skin, it is difficult for the natural active components of TCM to more effectively penetrate the skin and exert therapeutic effects. Therefore, the development of an efficient drug delivery system to facilitate enhanced transdermal absorption of TCM becomes imperative for its clinical application. In this study, we designed a compound Salvia miltiorrhiza-Blumea balsamifera nanoemulsion gel (CSB-NEG) and investigated its therapeutic effects on rabbit HS models. The prescription of CSB-NEG was optimized by single-factor, pseudoternary phase diagram, and central composite design experiments. The results showed that the average particle size and PDI of the optimized CSB-NE were 46.0 ± 0.2 nm and 0.222 ± 0.004, respectively, and the encapsulation efficiency of total phenolic acid was 93.37 ± 2.56%. CSB-NEG demonstrated excellent stability and skin permeation in vitro and displayed a significantly enhanced ability to inhibit scar formation compared to the CSB physical mixture in vivo. After 3 weeks of CSB-NEG treatment, the scar appeared to be flat, pink, and flexible. Furthermore, this treatment also resulted in a decrease in the levels of the collagen I/III ratio and TGF-β1 and Smad2 proteins while simultaneously promoting the growth and remodeling of microvessels. These findings suggest that CSB-NEG has the potential to effectively address the barrier properties of the skin and provide therapeutic benefits for HS, offering a new perspective for the prevention and treatment of HS.

Wound-healing effect of topical nanoemulsion-loaded cream and gel formulations of Hippophae rhamnoides L. (sea buckthorn) fruit oil and their acute dermal toxicity study on female SD rats.

The objective of this study was to evaluate the efficacy and safety of topical nanoemulsion (NE)-loaded cream and gel formulations of Hippophae rhamnoides L. (sea buckthorn [SBT]) fruit oil for wound healing. The NE-loaded cream and gel formulations of H. rhamnoides L. (SBT) fruit oil (IPHRFH) were prepared and evaluated for their wound-healing activity on female Sprague-Dawley (SD) rats. They were further divided into groups (seven) and the wound-healing activity was determined by measuring the area of the wound on the wounding day and on the 0th, 4th, 8th, and 10th days. The acute dermal toxicity of the formulations was assessed by observing the erythema, edema, and body weight (BW) of the rats. The topical NE cream and gel formulations of H. rhamnoides L. (SBT) fruit oil showed significant wound-healing activity in female SD rats. The cream formulation of IPHRFH showed 78.96%, the gel showed 72.59% wound contraction on the 8th day, whereas the positive control soframycin (1% w/w framycetin) had 62.29% wound contraction on the 8th day. The formulations also showed a good acute dermal toxicity profile with no changes significantly affecting BW and dermal alterations. The results of this study indicate that topical NE-loaded cream and gel formulation of H. rhamnoides L. (SBT) fruit oil are safe and effective for wound healing. The formulations showed no signs of acute dermal toxicity in female SD rats.

Propranolol nanoemulgel: Preparation, in-vitro and ex-vivo characterization for a potential local hemangioma therapy

A lack of safe and effective topical alternatives to oral propranolol HCl (PHCl) hampers optimal management of infantile hemangioma (IH), particularly in complex cases with severe side effects or treatment failures. This study aimed to develop a nanoemulsion gel (NEG) for topical PHCl delivery. A meticulously formulated nanoemulsion (NE) encapsulated with clove oil, Tween 20, and polyethylene glycol 400 emerged as the standout candidate (NE3) due to its exceptional stability, resilience, and favorable drug loading. NE3 exhibited a remarkable globule size of 14.57 nm, a low polydispersity index (PDI) of 0.282, and a stabilizing zeta potential of −19.89 mV. The subsequent formulation of PHCl-NEG displayed desired rheological and spreadability properties for topical application. Ex-vivo skin retention and permeation studies revealed effective PHCl deposition within the dermal layer with minimal systemic exposure. This promising approach offers a potential alternative to oral PHCl, potentially mitigating severe side effects and improving outcomes in complex IH cases.

Coenzyme Q10-loaded nanoemulsion hydrophilic gel: Development, characterization, stability evaluation and in vivo effects in skin

This study aimed to develop a physically and chemically stable hydrogel, which contains coenzyme Q10 (Q10)-loaded nanoemulsion, able to reduce transepidermal water loss (TEWL) and enhance skin hydration. Q10-loaded nanoemulsion was, after its characterization (particle size, polydispersity index (PDI), oxidation index, pH value, Q10-content, and electron microscopy) incorporated into a carbomer gel. The prepared Q10-loaded nanoemulsion gel was analyzed for its rheological parameters, pH value and Q10-content, after its preparation (48 h), after the stress test (5 cycles; 1 cycle: 24 h at 4 °C, 24 h at 20±2 °C and 24 h at 40 °C) and at predetermined time intervals during its storage at 20±2 °C and at 40 °C for six months. The Q10-loaded nanoemulsion gel, plain Q10-gel, Q10-free nanoemulsion gel and placebo carbomer gel were investigated in vivo for their effects in 15 human volunteers, during their 28 days’ application onto the skin. Skin hydration and TEWL were determined before starting the treatment, during 28 days of treatment, and 4 days after treatment completion. The results showed that the Q10-nanoemulsion was of a sufficiently low particle size (307,4 ± 0,5 nm) and homogeneity (PDI = 0.270 ± 0.002) for skin application, and that its characteristics were not changed by its incorporation into the gel. A shear-thinning plastic flow behavior was seen for the Q10-nanoemulsion gel. The stress test as well as storage at 20±2 °C and 40 °C did not change the rheological parameters of the gel. However, Q10-content decreased in the Q10-loaded nanoemulsion gel, but less compared to the Q10-gel. The developed Q10-nanoemulsion gel was able to significantly decrease TEWL compared to untreated skin (control), while it was not able, without the addition of a moisturizing agent (hyaluronic acid) and emollient (C12-15 alkyl benzoate) to increase skin hydration compared to control. Thus, besides the addition of a Q10-nanoemulsion into a hydrogel, it is necessary to add moisturizers and/or emollients to increase skin hydration.

Manipulation of the thermo-rheological properties of stable Fe3O4 nanoparticles-embedded PCM nanoemulsions

Phase Change Material (PCM) nanoemulsions offer numerous benefits as thermal energy storage systems, including high energy storage capacity, rapid thermal response, enhanced stability, and easy integration into existing thermal management systems. This study focuses on producing nanoemulsions with fine droplets of commercial paraffin RT42, stabilized with the anionic surfactant sodium dodecyl sulfate (SDS) using the sonication method. The impact of formulation of PCM nanoemulsions on its thermophysical and rheological characterization has been investigated. The results indicated that the degree of supercooling declined from 12.8 °C to 8.6 °C as the PCM volume fraction varied from 10 to 45 vol%. This decrease was attributed to the enlargement of PCM droplet size from 110 to 164 nm while maintaining a constant PCM-to-surfactant ratio of 10:1. By incorporating Fe3O4 nanoparticles as a nucleating agent at two different concentrations of 1 and 4 %, the supercooling degree decreased from 10.2 °C to 8.2 °C when 4 % Fe3O4 nanoparticles were added. The samples exhibited remarkable stability throughout a period of one year of storage and under dynamic conditions, including 50 freeze-thaw cycles. Rheological investigations and the gelation mechanism through estimation of the attractive and repulsive interaction forces among droplets revealed that nanoemulsions with volume fractions ≥30 % transformed from fluid-like states to viscoelastic gels due to the depletion attractions caused by SDS micelles in the continuous phase. These findings contribute to a better understanding of the factors influencing the formation of viscoelastic PCM nanoemulsion gels and their potential applications across various fields.

Preparation and characterization of a curcumin nanoemulsion gel for the effective treatment of mycoses

Fungal infections of skin including mycoses are one of the most common infections in skin or skins. Mycosis is caused by dermatophytes, non-dermatophyte moulds and yeasts. Various studies show different drugs to treat mycoses, yet there is need to treat it with applied drugs delivery. This study was designed to prepare a bio curcumin (CMN) nanoemulsion (CMN-NEs) for transdermal administration to treat mycoses. The self-nanoemulsification approach was used to prepare a nanoemulsion (NE), utilizing an oil phase consisting of Cremophor EL 100 (Cre EL), glyceryl monooleate (GMO), and polyethylene glycol 5000 (PEG 5000). Particle size (PS), polydispersity index (PDI), zeta potential (ZP), Fourier transform infrared (FTIR) spectrophotometric analysis, and morphological analyses were performed to evaluate the nanoemulsion (NE). The in vitro permeation of CMN was investigated using a modified vertical diffusion cell with an activated dialysis membrane bag. Among all the formulations, a stable, spontaneously produced nanoemulsion was determined with 250 mg of CMN loaded with 10 g of the oil phase. The average droplet size, ZP, and PDI of CMN-NEs were 90.0 ± 2.1 nm, − 7.4 ± 0.4, and 0.171 ± 0.03 mV, respectively. The release kinetics of CMN differed from zero order with a Higuchi release profile as a result of nanoemulsification, which also significantly increased the flux of CMN permeating from the hydrophilic matrix gel. Overall, the prepared nanoemulsion system not only increased the permeability of CMN but also protected it against chemical deterioration. Both CMN-ME (24.0 ± 0.31 mm) and CMN-NE gel (29.6 ± 0.25 mm) had zones of inhibition against Candida albicans that were significantly larger than those of marketed Itrostred gel (21.5 ± 0.34 mm). The prepared CMN-NE improved the bioavailability, better skin penetration, and the CMN-NE gel enhanced the release of CMN from the gel matrix on mycotic patients.

Formulation and effectiveness test of clove flower oil (Syzygium aromaticum L.) nanoemulsigel preparations against Propionibacterium acnes bacteria

Background: Acne is a chronic inflammatory process in the pilosebaceous glands. The appearance of acne is a process of follicular hyper-keratinization, which causes blockage of the pores so that the hair follicles are blocked by bacteria known as Propionibacterium acnes. Clove flower oil contains eugenol compounds which have the strongest activity against gram-positive and gram-negative bacteria. Methods: In this research, antibacterial activity tests were carried out on clove flower oil with various concentrations and nano-emulsion gel preparations were made with a clove flower oil concentration of 1.5%; 3%; 5.5%, which was then tested for antibacterial activity on the nano-emulsion gel preparations of clove flower oil measured using a caliper and the diameter of the inhibition zone produced was recorded. Results: the results of the organoleptic research showed that the color was yellow, transparent and had a distinctive odor, homogeneity showed that there were no coarse particles, viscosity was still within the required range, pH showed that the pH was still within the required range of 4.5-6.5, particle size test was below 200 nm, cycling test showed that it was stable during storage at hot and cold temperatures for 6 cycles of P. acnes inhibitory clove flower oil nano-emulsion preparation with a concentration of 1.5%; 3%; 5.% respectively have resistance of 11.60 mm, 13.53 mm, 15.76 mm Conclusions: From the results of the research that has been carried out, it is concluded that clove flower oil can be formulated into a nano-emulsion gel preparation, is stable during cycling tests, and has a particle size below 200 nm. Nano-emulsion gel formulations have the greatest antibacterial activity compared to emulsion gel formulations.

Desonide Nanoemulsion Gel for Transdermal Absorption Drug Delivery: Pharmacodynamic and Safety Evaluation.

When administered transdermally, desonide is ineffective due to its poor solubility. As a new transdermal delivery system, nanoemulsion gel has demonstrated significant advantages for drug delivery over conventional formulations. We have established desonide nanoemulsion gel (DES NE gel) for better transdermal absorption, but its efficacy and safety still need to be evaluated. This study aims to provide additional evidence demonstrating the improved pharmacodynamics and safety of transdermal delivery of Desonide via nanoemulsion gel. Pharmacodynamics and safety of Desonide nanoemulsion gel were evaluated using Desonate ® as the reference formulation. To assess the difference in curative effect between DES NE gel and Desonate® and to ensure safety, atopic dermatitis (AD) models in KM mice were developed using 2,4-dinitrofluorobenzene (DNFB). The degree of ear swelling, ear mass difference, thymus, spleen index, and HE conventional pathology of mice were used as pharmacodynamic evaluation indexes, and the irritation was predicted by the New Zealand rabbit epidermal stimulation assay. Nanoemulsion gels may facilitate transdermal penetration of drugs by influencing the skin condition. Medium and high doses of DES NE gel significantly ameliorated the inflammation and swelling of the ear caused by dermatitis/eczema in mice. In addition, compared with DES gel, skin irritation extent did not increase. Nanoemulsion gel can be applied to improve the efficacy of drugs with low potency or poor solubility. DES NE gel provides a higher transdermal potential than other delivery systems. In this study, it was found that nanoemulsion gel is a promising percutaneous carrier of DES. DES NE-GEL has a significant curative effect on dermatitis/eczema in a mouse model and is expected to provide a new, efficient, and low toxic preparation for clinical treatment of dermatitis/eczema through the percutaneous system.

Impact of miconazole nitrate ferrying cationic and anionic nanoemulsion and gels on permeation profiles of across EpiDerm, artificial membrane, and skin: Instrumental evidences

Based on our previous report, the study was extended to investigate the impact of miconazole nitrate (MCN) loaded cationic/anionic nanoemulsions and nanoemulsion gels on permeation behaviour across artificial-membrane, EpiDerm, and rat skin. Nanoemulsions and gels were evaluated for size, charge, viscosity, size-distribution, pH, and percent entrapment efficiency (%EE). In vitro drug diffusion across artificial membrane and EpiDerm were conducted to get diffusion coefficients. Permeation profiles were studied using rat skin to investigate mechanistic insight of formulated mediated permeation followed by CLSM (confocal laser scanning microscopy), SEM (scanning electron microscopy), AFM (atomic force microscopy), and irritation studies. Results showed that MCNE11-Rh (probed cationic nanoemulsion at pH ∼ 7.2) and MNE11-Rh (probed anionic nanoemulsion at pH ∼ 7.2) showed size values of 158 nm and 145 nm, respectively whereas MCNE11-GR (probed cationic nanoemulsion gel at pH ∼ 6.8) and MNE11-GR (probed anionic nanoemulsion gel at pH ∼ 6.8) exhibited size values 257 nm and 243 nm, respectively. The %EE values were found to be as 91.5 % and 89.6 % for MCNE11-Rh and MNE11-Rh, respectively. The gels (∼6000 cP) elicited relatively high viscosity than nanoemulsions (∼3300 – 3500 cP). MCNE11-GR showed the highest values of permeation flux, diffusion rate, diffusion coefficient (D), and permeation coefficient (P) across artificial membrane, EpiDerm, and rat skin which may be attributed to three potential factors (cationic charge, composition, and hydration by the hydrophilic gel) working in tandem. Transepidermal water loss (TEWL) by the MCNE11-GR was maximum (14.4 g/m2h) than control (6.1 g/m2h) indicating augmented interaction of MCNE11-Rh with skin components. Conclusively, cationic nanoemulsion gel was promising carrier for enhanced permeation and the drug access to the dermal region to treat deep seated fungal infections.

Evaluation of Myricetin loaded Nanoemulsion Formulation for the Management of Diabetic Wound Healing in Experimental Animals

Myricetin is considered a flavonols under the category of flavonoids. According to recent research, myricetin has different curative effects on diabetes, cancer, and the heart. It has been suggested that myricetin is a more potent antioxidant than quercetin. The present study aimed to investigate the wound healing effect of myricetin loaded nanoemulsion (MYCT-NE) gel formulation in diabetic animals. Myricetin-loaded nanoemulsion was converted in nanoemulsion gel using carbopol 934 and evaluated for diabetic wound healing effect against wound contraction measurement, hydroxyproline estimation, protein estimation, antioxidant assay and histopathological study. On day 18th of treatment, the wound contraction of Faster wound healing was observed in the MYCT-NE gel treated groups compared to the control group, as indicated by a shorter epithelialization duration. Increased collagen turnover was shown by increased hydroxyproline levels in MYCT-NE gel-treated tissue, which sped up the healing of treated wounds. MYCT-NE gel possesses effective antioxidant activity by restoration of the superoxide dismutase SOD, GSH and catalase level in the wound tissues after treatment and healing. The observations showed that the original tissue regeneration was found efficiently in the wound treated with MYCT-NE gel and reference group without edema and congestion. The results obtained in the present study were indicated that MYCT-NE gel accelerates cutaneous diabetic wound healing through reducing oxidative status in experimental animals.

Triptolide nanoemulsion gel as a transdermal drug delivery system: preparation, pharmacokinetics, and rheumatoid arthritis evaluation.

This study aimed to develop and evaluate triptolide nanoemulsion gels (TP-NE gels) as a transdermal drug delivery system. TP-NE was prepared and optimized via emulsification and the central composite design response surface method. The optimized TP-NE gel was evaluated in vitro and in vivo. TP-NE gel microstructure, in vitro and in vivo pharmacokinetics, and anti-rheumatoid arthritis effects were studied to evaluate the feasibility of its percutaneous administration. The Optimized TP-NE was observed using a Malvern Autosizer Nano ZS 90 inspection system and a transmission electron microscope (TEM). The nanoemulsion had an average size of 162.9 ± 0.281 nm, a polydispersity index of 0.272 ± 0.024, a zeta potential of -30.03 ± 2.01 mV, and mostly spherical and uniform morphology. In addition, the TP-NE gel pharmacokinetics, assessed via a skin-blood two-site synchronous microdialysis, revealed that TP was higher in the skin than in the blood. TP-NE gel is crucial in reducing knee edema, inhibiting inflammation, and treating rheumatoid arthritis by regulating tumor necrosis factor-alpha, interleukin-1β, and -6 levels. The TP-NE gel is a promising local delivery method for rheumatoid arthritis (RA)-associated edema and inflammation and can serve as a prospective platform for percutaneous TP administration.

Development of composite nanoemulsion gels as carriers for co-delivery of wheat germ oil and probiotics and their incorporation in yoghurt

Emulsion gels have received significant interest in the food industry as functional colloids due to their improved stability and encapsulated bioactive substances. Thus, in this study, four different emulsions (EM I–IV) were formed by emulsifying wheat germ oil (WGO) using two methods: without sonication for EM I and III (fortified with orange essential oil, OEo), and with sonication for EM II and IV (fortified with OEo). To produce four distinct forms of composite emulsion gels, the prepared emulsions were fortified with probiotics and then added to biopolymers (Gel I-IV). In the emulsions and gels, the WGO oxidative stability and the Lb. rhamonusus survival rate were assessed. The promising formulations were applied to yoghurt as a food model. The results showed that EM III (232.2 nm) and IV (153.9 nm) demonstrated a higher average size than their plain EM I (185.7 nm) and II (131.6 nm). EM IV and Gel IV, with an induction period of 8.35 h and 10.06 h, were the most promising formulations for postponing WGO oxidative degradation. Gel IV had the highest DPPH scavenging activity with 80.88%, while EM I significantly decreased the activity by 54.21%. The Lb. rhamonusus survival rates in Em IV and Gel IV are 94.49% and 97.66%, respectively. Yoghurt incorporated with Gel IV enhanced the stability of pH and acidity throughout the storage period, decreased the syneresis value, and enhanced all parameters of texture profile analysis. Based on the results, emulsion gels could be used to deliver probiotics, nutraceuticals, and food additives.