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Computer Methods in Biomechanics and... Jun 2024This study focuses on the innovation of an inhaled sustained release form of insulin and the development of a neuro-fuzzy model specifically tailored to predict insulin...
This study focuses on the innovation of an inhaled sustained release form of insulin and the development of a neuro-fuzzy model specifically tailored to predict insulin release kinetics from polycondensed agar-carbomer hydrogels. These were synthesized by blending agar and carbomer, incorporating propylene glycol and glycerol, and then cross-linking by polycondensation. The structure and morphology of the hydrogel were analyzed Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy and Proton Nuclear Magnetic Resonance Spectroscopy. The neuro-fuzzy model, a combination of artificial neural networks and fuzzy logic, employs inputs such as concentrations of crosslinking agents, polycondensation time, and release time, with the output being the rate of insulin release. The model demonstrated a strong correlation with experimental data, highlighting its effectiveness and precision in predicting insulin delivery from hydrogel compositions and temporal parameters. This emphasizes the importance of intelligent modelling for forecasting the kinetic release of therapeutic agents from novel drug delivery systems.
PubMed: 38847620
DOI: 10.1080/10255842.2024.2362863 -
EMBO Molecular Medicine Jun 2024
PubMed: 38844556
DOI: 10.1038/s44321-024-00078-2 -
Indian Journal of Dermatology,... Apr 2024Background With the rise in cosmetic usage, adverse reactions related to cosmetics have also risen. Photocontact dermatitis to cosmetics is a challenging entity to...
Background With the rise in cosmetic usage, adverse reactions related to cosmetics have also risen. Photocontact dermatitis to cosmetics is a challenging entity to diagnose and manage. Objectives To evaluate the clinical features and photocontact sensitivity patterns in patients with cosmetic dermatitis and establish their association based on patch and photopatch test results. Methods A prospective observational study, where 80 patients with a clinical diagnosis of cosmetic dermatitis were patch or photopatch tested (as per indication) with the Indian standard series, Indian cosmetic and fragrance series, and the patient's personal product(s). Results A total of 104 positive reactions were observed in 57/80 patients, of which 50 were relevant to cosmetics usage. Sixty-five patients underwent a photopatch test, and 17 tested positive. Photosensitivity in patients was significantly associated with a positive photopatch test (p-value < 0.001). Various new photo-allergens were discovered, including propylene glycol, triethanolamine, chloroacetamide, isopropyl myristate, cetrimide and hexamine. Facial melanosis was a predominant clinical finding in 44 patients, with pigmented contact dermatitis detected in 19 (43.2%) of these cases. Limitations Patients' personal products could not be tested on every patient. Chemical analysis of indigenous products and the individual chemical ingredients of the patient's personal products could not be patch-tested separately. Phototesting was not performed in patients with photosensitivity. Conclusion In patients with suspected cosmetic dermatitis with history of photosensitivity or those with facial melanosis of unknown origin, a photopatch test is crucial to detect potentially hidden photo allergens. Many new photo allergens have emerged in the present study. Cosmetic companies should provide detailed information regarding each constituent of the cosmetic products.
PubMed: 38841970
DOI: 10.25259/IJDVL_1110_2022 -
The American Journal of Forensic... May 2024Vape juice is a diluent for e-cigarette active ingredients, nicotine or tetrahydrocannabinol (THC). Lack of strict regulation in vape juice production is a concern as...
Vape juice is a diluent for e-cigarette active ingredients, nicotine or tetrahydrocannabinol (THC). Lack of strict regulation in vape juice production is a concern as ingredients and their concentrations may vary widely from the labeling.A 43-year-old woman was transported via ambulance to the hospital after ingesting homemade vape juice, presenting unresponsive with decerebrate posturing. She reportedly made a tincture combining a vape juice purchased online (containing "ethylene glycol") and THC for "endometriosis-related pain relief." Laboratory evaluation revealed anion gap metabolic acidosis, elevated serum lactate, and high serum osmolality. Urine fluoresced under Wood's lamp, and fomepizole was administered as an ethylene glycol antidote, but she expired the following afternoon. Clinical serum toxicology results returned after death revealed 235 mg/dL of methanol, and no ethylene glycol.Autopsy findings included ischemic changes of the gastrointestinal tract and cerebral edema with herniation. Postmortem toxicology performed on hospital admission blood revealed methanol (220 mg/dL), propylene glycol (59 mg/dL), Δ-9 THC and metabolites, and medications administered during hospitalization. The medical examiner determined the cause of death to be methanol and propylene glycol toxicity.To our knowledge, this is the first report of accidental death from ingestion of vape juice contaminated with toxic alcohol.
PubMed: 38833354
DOI: 10.1097/PAF.0000000000000951 -
International Medical Case Reports... 2024Erythema multiforme is a hypersensitivity reaction caused by various factors, such as viruses, chemicals, and drugs. Electronic cigarettes (e-cigarettes) or vape is a...
INTRODUCTION
Erythema multiforme is a hypersensitivity reaction caused by various factors, such as viruses, chemicals, and drugs. Electronic cigarettes (e-cigarettes) or vape is a battery-powered nicotine delivery device that substitutes for traditional cigarettes. The chemical components of vaping, including propylene glycol and nicotine, can cause hypersensitivity reactions.
OBJECTIVE
To report a case of oral erythema multiforme in an e-cigarettes user, treatment, and review the literature regarding the impact of these devices on oral health.
CLINICAL CASE
A 22-year-old woman came to the Oral Medicine Department with complaints of stomatitis causing pain, eating, and drinking difficulty, which started with fever and pimple-like on the lips. She was an active vape user for one year. Extraoral examination revealed no lesions on other body parts. The serosanguinolent crusts on the lips, an erosive area on the labial commissures and tended to bleed. Intraoral examination revealed white ulcers with yellowish edges and irregular, varying sizes in several parts of the oral mucosa. The anti-HSV-1 IgG laboratory results showed non-reactive, leading to a diagnosis of oral erythema multiforme. Management of oral conditions using 0.9% NaCl compress, dexamethasone mouthwash, and hyaluronic acid, applying 2% miconazole cream on labial commissures and vaseline album cream on the dry lips, and stopping vaping. Oral condition improved in a week of therapy.
CONCLUSION
Erythema multiforme restricted to the mouth is rare, especially associated with electronic cigarettes. Early identification of oral ulcerative disorders is crucial for accurate diagnosis and treatment, where clinicians should consider oral erythema multiforme as a possible diagnosis.
PubMed: 38828364
DOI: 10.2147/IMCRJ.S455640 -
Operative Dentistry May 2024Tooth color matching is challenging, and digital photocolorimetry using eLABor_aid (eLAB) provides objective evaluation through polarized photographs. However, its...
OBJECTIVE
Tooth color matching is challenging, and digital photocolorimetry using eLABor_aid (eLAB) provides objective evaluation through polarized photographs. However, its comparability with spectrophotometry remains unclear.
METHODS AND MATERIALS
Bovine incisor root canals (n=30) were prepared to simulate an incomplete root apex. The teeth were randomly assigned to three groups based on intracanal medication: control (without medication); calcium hydroxide/propylene glycol; and triple-antibiotic paste (n=10 each). Tooth color was assessed using both eLAB and spectrophotometry. Measurements were taken at the crown medio-cervical region on five-time intervals (baseline, 1, 3, 7, and 14 days). Statistical analysis included two-way repeated-measures ANOVA, Sidak post hoc and Pearson's correlation test (α=0.05).
RESULTS
No significant differences were observed between the two methods for either medication or follow-ups (p>0.05). Triple-antibiotic paste exhibited higher color variation (p<0.05). After 7 days, all groups presented significant color changes (p<0.05). Moderate to high correlations (R2 from 0.51 to 0.84, p<0.0001) were found between both methods for all groups at all intervals.
CONCLUSION
The eLAB is a reliable method for detecting tooth color changes, and its results are comparable to spectrophotometry analysis.
Topics: Cattle; Animals; Spectrophotometry; Colorimetry; Anti-Bacterial Agents; Color; In Vitro Techniques; Calcium Hydroxide; Incisor; Propylene Glycol; Tooth Discoloration; Root Canal Irrigants; Metronidazole; Ciprofloxacin; Dental Pulp Cavity
PubMed: 38807319
DOI: 10.2341/23-134-L -
Annales Pharmaceutiques Francaises May 2024The research aimed to investigate the solubility and thermodynamics of salicylic acid in two binary solvent mixtures of (1-propanol+propylene glycol) and (ethylene...
The research aimed to investigate the solubility and thermodynamics of salicylic acid in two binary solvent mixtures of (1-propanol+propylene glycol) and (ethylene glycol monomethyl ether+1-propanol). The study was conducted in the temperature range of 293.2 to 313.2K. To analyze the experimental solubility data, several linear and nonlinear cosolvency models, such as the van't Hoff, Jouyban-Acree, Jouyban-Acree-van't Hoff, mixture response surface, and modified Wilson models were employed. The models' effectiveness was evaluated by comparing the mean relative deviations of the back-calculated solubility data to the experimental values. In addition, the apparent thermodynamic parameters, including Gibbs energy, enthalpy, and entropy, were calculated using the van't Hoff and Gibbs equations. Furthermore, the study measured the density values for salicylic acid-saturated mixtures and represented them mathematically through the Jouyban-Acree model.
PubMed: 38797502
DOI: 10.1016/j.pharma.2024.05.004 -
International Journal of Pharmaceutics Jun 2024Metformin (MET) can be an alternative therapeutic strategy for managing ocular burn primarily because of its pleiotropic mechanism. Longer retention on the ocular...
Metformin (MET) can be an alternative therapeutic strategy for managing ocular burn primarily because of its pleiotropic mechanism. Longer retention on the ocular surface and sustained release are necessary to ensure the efficacy of MET for ocular application. Although the high aqueous solubility of MET is good for formulation and biocompatibility, it makes MET prone to high nasolacrimal drainage. This limits ocular residence and may be a challenge in its application. To address this, polymers approved for ophthalmic application with natural origin were analyzed through in silico methods to determine their ability to bind to mucin and interact with MET. An ocular insert of MET (3 mg/6 mm) was developed using a scalable solvent casting method without using preservatives. The relative composition of the insert was 58 ± 2.06 %w/w MET with approximately 14 %w/w tamarind seed polysaccharide (TSP), and 28 %w/w propylene glycol (PG). Its stability was demonstrated as per the ICH Q1A (R2) guidelines. Compatibility, ocular retention, drug release, and other functional parameters were evaluated. In rabbits, efficacy was demonstrated in the 'corneal alkali burn preclinical model'. TSP showed potential for mucoadhesion and interaction with MET. With adequate stability and sterility, the insert contributed to adequate retention of MET (10-12 h) in vivo and slow release (30 h) in vitro. This resulted in significant efficacy in vivo.
Topics: Animals; Metformin; Rabbits; Tamarindus; Drug Liberation; Delayed-Action Preparations; Polysaccharides; Seeds; Eye Burns; Administration, Ophthalmic; Drug Implants; Male; Burns, Chemical; Drug Stability; Corneal Injuries; Cornea; Propylene Glycol; Solubility
PubMed: 38795935
DOI: 10.1016/j.ijpharm.2024.124265 -
Polymers May 2024Urethane acrylate (UA) was synthesized from various di-polyols, such as poly(tetrahydrofuran) (PTMG, Mn = 1000), poly(ethylene glycol) (PEG, Mn = 1000), and...
Urethane acrylate (UA) was synthesized from various di-polyols, such as poly(tetrahydrofuran) (PTMG, Mn = 1000), poly(ethylene glycol) (PEG, Mn = 1000), and poly(propylene glycol) (PPG, Mn = 1000), for use as a polymer binder for paint. Polymethyl methacrylate (PMMA) and UA were blended to form an acrylic resin with high transmittance and stress-strain curve. When PMMA was blended with UA, a network structure was formed due to physical entanglement between the two polymers, increasing the mechanical properties. UA was synthesized by forming a prepolymer using di-polyol and hexamethylene diisocyanate, which were chain structure monomers, and capping them with 2-hydroxyethyl methacrylate to provide an acryl group. Fourier transform infrared spectroscopy was used to observe the changes in functional groups, and gel permeation chromatography was used to confirm that the three series showed similar molecular weight and PDI values. The yellowing phenomenon that appears mainly in the curing reaction of the polymer binder was solved, and the mechanical properties according to the effects of the polyol used in the main chain were compared. The content of the blended UA was quantified using ultravioletvisible spectroscopy at a wavelength of 370 nm based on 5, 10, 15, and 20 wt%, and the shear strength and tensile strength were evaluated using specimens in a suitable mode. The ratio for producing the polymer binder was optimized. The mechanical properties of the polymer binder with 5-10 wt% UA were improved in all series.
PubMed: 38794611
DOI: 10.3390/polym16101418 -
Genes May 2024Much research has been conducted to determine how hair regeneration is regulated, as this could provide therapeutic, cosmetic, and even psychological interventions for...
Much research has been conducted to determine how hair regeneration is regulated, as this could provide therapeutic, cosmetic, and even psychological interventions for hair loss. The current study focused on the hair growth effect and effective utilization of fatty oil obtained from Bryde's whales through a high-throughput DNA microarray approach in conjunction with immunohistochemical observations. The research also examined the mechanisms and factors involved in hair growth. In an experiment using female C57BL/6J mice, the vehicle control group (VC: propylene glycol: ethanol: water), the positive control group (MXD: 3% minoxidil), and the experimental group (WO: 20% whale oil) were topically applied to the dorsal skin of the mouse. The results showed that 3% MXD and 20% WO were more effective than VC in promoting hair growth, especially 20% WO. Furthermore, in hematoxylin and eosin-stained dorsal skin tissue, an increase in the number of hair follicles and subcutaneous tissue thickness was observed with 20% WO. Whole-genome transcriptome analysis also confirmed increases for 20% WO in filaggrin (), a gene related to skin barrier function; fibroblast growth factor 21 (), which is involved in hair follicle development; and cysteine-rich secretory protein 1 (), a candidate gene for alopecia areata. Furthermore, the results of KEGG pathway analysis indicated that 20% WO may have lower stress and inflammatory responses than 3% MXD. Therefore, WO is expected to be a safe hair growth agent.
Topics: Animals; Mice; Female; Mice, Inbred C57BL; Computational Biology; Filaggrin Proteins; Hair Follicle; Oligonucleotide Array Sequence Analysis; Skin; Hair; Minoxidil; Gene Expression Profiling
PubMed: 38790256
DOI: 10.3390/genes15050627