Histologic Effects of Fractional Lasers and Energy-Based Devices on Intradermally Injected Hyaluronic Acid Filler for Improving Skin Smoothness.

Background: Prior studies have shown that energy-based devices (EBDs) over pre-injected hyaluronic acid (HA) fillers do not significantly affect clinical outcomes. However, the impact of EBDs over newly FDA-approved HA filler for improving skin smoothness is still undetermined.

Objective: To evaluate the immediate histologic changes after various popular EBDs are performed over pre-injected, newly FDA-approved intradermal HA filler.

A cross-sectional study of physiologic volar melanotic macules: Demographic, historical, clinical, and dermatoscopic features of a common yet neglected pigmentary variant in individuals with skin of color.

Background: Physiologic volar melanotic macules (P-VMM) are understudied. Trauma has been suggested as a predisposing factor. Little has been published over the last several decades.

A Systematic Review of Follicular Psoriasis: A Unique but Under-Recognized Entity.

Background: Follicular psoriasis (FP) is a rare and under-recognized subtype of psoriasis that affects hair follicles and can be frequently misdiagnosed due to its unique presentation.

Objective: We aimed to analyze the frequently reported clinical, histological, and dermatoscopic features of FP, as well as their treatment options.

Methods: We conducted a systematic review of the PubMed/MEDLINE database using the search terms "follicular" and "psoriasis.

Laboratory Monitoring in Isotretinoin Therapy for Acne: How Long and How Often Must We Test Our Patients?

The optimal frequency and timing of laboratory monitoring during isotretinoin treatment remains controversial. We aimed to investigate the frequency, timing, and severity of abnormal results during isotretinoin for acne. We conducted a retrospective cohort study comprising 444 acne patients prescribed isotretinoin at Boston Medical Center from 2004 to 2017; these patients had at least one available baseline laboratory result.

Short Caco-2 model for evaluation of drug permeability: A sodium valerate-assisted approach.

The human colorectal adenocarcinoma cell line Caco-2, widely used for studying intestinal drug permeability, is typically grown on permeable filter supports and matures in 21 days with frequent media changes. The process is labor-intensive, prone to contamination, and has low throughput, contributing to the overall high utilization cost. Efforts to establish a low-cost, high-throughput, and short-duration model have encountered obstacles, such as weaker tight junctions causing monolayer leaks, incomplete differentiation resulting in low transporter expression, intricate and challenging protocols, and cytotoxicity, limiting the usability.

Histological Assessment of the Effectiveness of Microneedling Device-Assisted Filler Delivery.

Background: Microneedling is used to enhance transcutaneous drug delivery. However, the extent to which microneedling devices impact filler delivery and whether this varies by filler type, microneedling device type, and treatment sequence is not known.

Objective: To histologically assess and quantify the delivery of commonly used fillers through microneedling, using both a microneedling pen and a microneedling roller.

An Improved In Vitro Blood-Brain Barrier Model for the Evaluation of Drug Permeability Using Transwell with Shear Stress.

The development of drugs targeting the central nervous system (CNS) is challenging because of the presence of the Blood-Brain barrier (BBB). Developing physiologically relevant in vitro BBB models for evaluating drug permeability and predicting the activity of drug candidates is crucial. The transwell model is one of the most widely used in vitro BBB models.

Laser-Assisted and Device-Assisted Filler Delivery: A Histologic Evaluation.

Background: Lasers and devices are used to enhance transcutaneous delivery of fillers. However, little has been published on the histologic findings of this form of laser/device-assisted delivery to determine the optimal devices and fillers.

Objective: To objectively evaluate the histological effects of laser-assisted and device-assisted filler delivery.

Merkel Cell Hyperplasia Versus Intraepidermal Merkel Cell Carcinoma: A Comparative Study of 2 Cases.

Intraepidermal Merkel cell hyperplasia and Merkel cell carcinoma represent 2 histologically similar-appearing diagnoses with significant differences regarding prognosis and management. We present 1 case of each diagnosis to highlight characteristic histopathologic and immunohistochemical features. Our case of Merkel cell hyperplasia was identified by its small intraepidermal nest of monomorphic cells without atypia or mitoses, which demonstrated cytoplasmic, rather than perinuclear dot, patterning on CK20 staining.

Long-term exposure changes the environmentally relevant bis(2-ethylhexyl) phthalate to be a neuro-hazardous substance disrupting neural homeostasis in emotional and cognitive functions.

Bis(2-ethylhexyl) phthalate (DEHP) is the most used member of the phthalate class of compounds. Extensive use of this plasticizer allows daily exposure to humans via various routes. A positive relationship between DEHP exposure and neurobehavioral disorders is suspected.

24,25-Dihydroxy Vitamin D and Vitamin D Metabolite Ratio as Biomarkers of Vitamin D in Chronic Kidney Disease.

The appropriate management of vitamin D deficiency and hyperparathyroidism is essential to prevent metabolic bone disorder (MBD) and cardiovascular diseases in chronic kidney disease (CKD). Recently, the 24,25-dihydroxyvitamin D [24,25(OH)D] and vitamin D metabolite ratio (VMR), i.e.

Efficacy and safety of topical agents in the treatment of melasma: What's evidence? A systematic review and meta-analysis.

Background: Various topical agents have been used to treat melasma; however, a large-scale evaluation among the currently available treatment is lacking.

Objectives: The aim of this study was to evaluate the efficacy and safety of topical agents for melasma.

Methods: The MEDLINE, Embase, Web of Science, Cochrane, and Alt-Healthwatch databases were searched in November 2021.