The causal relationship between blood metabolites and rosacea: A Mendelian randomization.

BACKGROUND: An increasing amount of research demonstrates that metabolic disorders are related to rosacea. However, the correlations and causal relationships among them remain unknown. METHODS: We conducted not only forward 2-sample MR (Mendelian randomization) analyses but also reverse MR analyses which showed positive results in the forward MR analysis. In the forward MR analyses, inverse-variance weighted (IVW) and MR-Egger were performed as MR analyses. Cochran's Q test and the MR-Egger Intercept were used for sensitivity analyses. Concerning reverse MR analyses, IVW, MR-Egger, weighted median, simple mode, and weighted mode were applied. Cochran's Q test, MR-Egger Intercept, and MR pleiotropy residual sum and outlier (MR-PRESSO) outlier test were applied as sensitivity analyses. RESULTS: A total of 24 metabolites and 1 metabolite ratio were shown to have a causal effect on rosacea. N-lactoyl phenylalanine (N-Lac-Phe) was estimated as statistically significant by Bonferroni correction. Interestingly, we found three metabolites that were negatively associated with rosacea, especially caffeine, which are in line with the results of a large cohort study of females. For reverse MR analysis, we revealed that rosacea could potentially decrease the generation of two metabolites: octadecenedioate (C18:1-DC) and methyl vanillate sulfate. CONCLUSION: This study identified blood metabolites that may be associated with the development of rosacea. However, the exact mechanism by which these positive metabolites influence rosacea remains uncertain due to the paucity of experimental investigations. The combination of genetics and metabolomics offers novel viewpoints on the research of underlying mechanisms of rosacea and has significant value in screening and prevention of rosacea.

Definition of refractory melasma and its treatment: a review.

Although patients with refractory melasma have been treated using various methods, there is still no precise definition or summary of the therapies. To define refractory melasma and conduct a review of the treatments, we searched for relevant publications in PubMed, Web of Science, and the Cochrane Library, and a total of 35 references were obtained. Refractory melasma can be roughly defined as an ineffective treatment for melasma, including topical bleaching agents, chemical peels, laser therapy, microdermabrasion for more than six months, or chemical peels treated more than six times. Meanwhile, physicians should be careful when treating patients with darker skin and dermal or mixed types of melasma since these individuals do not respond well to treatment. Lasers combined with other methods, especially different types of lasers or topical agents, are considered more effective than monotherapy. Oral tranexamic acid (TXA) is a prospective cure for refractory melasma. Other methods include a combination of chemical peels, microneedling, or injections with additional therapies. In conclusion, we were able to provide a rough definition of refractory melasma and list the available therapies. According to the literature, the most prevalent treatment is laser combination therapy. However, laser treatment should be considered only after topical agents and chemical peeling have failed. Considering its side effects, efficacy, and safety, oral TXA may be a better option, but more research is needed to make a firm conclusion. Moreover, maintenance therapy is required after treatment.

Supramolecular Chemistry of Windmill-like Al10 Clusters: Adjustable Guests and Hydrogen-Bonding Networks for Enhanced Optical Limiting.

The interest in cluster chemistry lies not only in the development of new types of geometric structures but also in the higher-level connectivity and assembly of clusters at the supramolecular level. Here, we report a novel windmill-like Al10 cluster and consider this geometrically unique cluster as an anionic node assembled together with different cationic guests such as imidazolium and guanidinium. These guests with different hydrogen-bond angles can help to obtain a series of diverse hydrogen-bonding networks and then manipulate the stacking mode of hosts and guests. Furthermore, we realized a supramolecular approach to fine-tune the optical limiting properties of the cluster. This work not only enriches the host-guest chemistry of ionic windmill-like clusters but also opens up more possibilities for aluminum oxo cluster-based hydrogen-bonded frameworks.

Efficacy and safety of picosecond laser for the treatment of melasma: a systematic review and meta-analysis.

Multiple laser modalities have been used for melasma treatment. However, the effectiveness of picosecond laser in treating melasma remains unclear. This meta-analysis investigated the effectiveness and safety of picosecond laser for melasma treatment. Randomized controlled trials (RCTs) comparing picosecond laser with conventional treatment for melasma were searched through five databases. The melasma area severity index (MASI)/modified MASI (mMASI) was used to quantify the degree of melasma improvement. Standardized mean differences and 95% confidence intervals were calculated using Review Manager for result standardization. Six RCTs, which used picosecond laser at 1064, 755, 595, and 532 nm wavelengths, were included herein. Picosecond laser significantly reduced the MASI/mMASI, but the results were highly heterogeneous (P = 0.008, I2 = 70%). In the subgroup analysis of 1064 and 755 nm picosecond lasers, 1064 nm picosecond laser significantly reduced the MASI/mMASI with no significant side effects (P = 0.04). Meanwhile, 755 nm picosecond laser did not significantly improve the MASI/mMASI compared with topical hypopigmentation agents (P = 0.08) and caused post-inflammatory hyperpigmentation. Other laser wavelengths could not be used in the subgroup analysis owing to an insufficient sample size. Picosecond laser at 1064 nm is safe and effective for melasma treatment. Picosecond laser at 755 nm is not superior to topical hypopigmentation agents in treating melasma. The exact efficacy of other wavelengths of picosecond laser for melasma treatment remains to be verified in large-scale RCTs.

The Efficacy of Fractional Carbon Dioxide Laser in Surgical Scars Treatment: A system Review and Meta-analysis.

BACKGROUND: Surgical scars seriously affect a patient's quality of life, and they have a strong impact on individuals. Many studies have reported the results of using fractional carbon dioxide (CO2) laser to treat surgical scars and have generally found it to be effective. OBJECTIVES: We conducted a meta-analysis with the objective of evaluating and proving the efficacy of fractional CO2 laser therapy for surgical scars. METHODS: We performed a search of databases including PubMed, Web of Science, Embase and the Cochrane Library. The outcomes of the meta-analysis were overall scores on the Vancouver Scar Scale (VSS) and its four dimensions (pigmentation, vascularity, pliability and height). Statistical analysis was performed using RevMan 5.4 software. RESULTS: A total of ten studies were included in this meta-analysis, including six randomized controlled trials (RCTs) and four nonrandomized controlled trials (N-RCTs). In the meta-analysis of RCTs and N-RCTs, similar results were obtained, and fractional CO2 laser irradiation significantly decreased VSS scores (P < 0.00001). In addition, fractional CO2 laser irradiation also had a significant effect on scores on the pigmentation (P = 0.08), vascularity (P = 0.001), flexibility (P = 0.005) and height (P = 0.008) dimensions. Except for mild pain during treatment and temporary erythema after treatment, most patients had no obvious adverse reactions. CONCLUSION: Our study found that fractional CO2 laser exhibits excellent efficacy and safety in terms of surgical scar treatment. Thus, we hope it becomes more widely available to patients with surgical scars. LEVEL OF EVIDENCE III: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors   www.springer.com/00266 .

Efficacy and safety of laser-assisted delivery of tranexamic acid for the treatment of melasma: a systematic review and meta­analysis.

Laser-assisted drug delivery (LADD) is a new treatment for delivering drugs within the skin. This meta-analysis investigates the effectiveness and safety of the laser-assisted delivery of tranexamic acid (TXA) to treat melasma. A literature review was conducted by searching publication platforms to search for randomized controlled trials (RCTs) that compared laser-assisted delivery of TXA with laser-alone or topical TXA-alone treatment. The Embase, Web of Science, PubMed, Google Scholar, and Cochrane Library databases were searched, and Melasma Area Severity Index (MASI)/modified MASI (mMASI) scores used as the clinical improvement outcomes. All statistical analyses were performed using the RevMan software (Review Manager, V.5.3). The standardized mean differences and 95% confidence intervals were used to assess the results. Five RCTs were included in this meta-analysis. These studies used ablative fractional photothermolysis and nonablative dermal remodeling laser modalities. The results showed that both laser modalities combined with TXA significantly decreased the MASI/mMASI scores (P = .0003). Furthermore, no serious adverse events were observed, except mild erythema and burning pain. The meta-analysis found that the laser-assisted delivery of TXA is a new effective and safe treatment option for melasma treatment.

Surface Engineering of Flower-Like Ionic Liquid-Functionalized Graphene Anchoring Palladium Nanocrystals for a Boosted Ethanol Oxidation Reaction.

The development of low-cost and high-performance electrocatalyst-supporting materials is desirable and necessary for the ethanol oxidation reaction (EOR). Here, we report a facile and universal template-free approach for the first time to synthesize three-dimensional (3D) flower-like ionic liquid-functionalized graphene (IL-RGO). Then, the crystalline Pd nanoparticles were anchored on IL-RGO by a simple wet chemical growth method without a surfactant (denoted as Pd/IL-RGO). In particular, the IL is conducive to form a 3D flower-like structure. The optimized Pd/IL-RGO-2 presents a much-promoted electrocatalytic performance toward the EOR compared with commercial Pd/C catalysts, which is mainly derived from the grafted IL on RGO and the unique 3D flower-like structure. In detail, the IL can control, stabilize, and disperse the Pd nanocrystals as well as serving as the solvent and electrolyte in the microenvironment of the EOR, and the 3D flower-like structure endows the Pd/IL-RGO with high surface areas and rich opened channels, thereby kinetically accelerating the charge/mass transfers. Furthermore, density functional theory calculations reveal that the strong electronic interaction between Pd and IL-RGO generates a downshift of dcenter for Pd and thereby enhances the durability toward CO-like intermediates and electrocatalytic reaction kinetics.

No Causal Effect of COVID-19 on Varicella-Zoster Infection, Herpes Zoster Progression, and Postherpetic Neuralgia: A Two-Sample Mendelian Randomization Study.

Purpose: Coronavirus disease (COVID-19) may trigger the reactivation of the latent varicella-zoster virus and may be a risk factor for herpes zoster (HZ). However, the causal relationship between COVID-19 and varicella-zoster infections remains controversial. This study aimed to estimate the causal inferences between COVID-19 and HZ. Methods: This study used a two-sample Mendelian randomization (MR) design. The inverse variance-weighted method was used as the primary method and sensitivity analyses were conducted, including the MR-Egger regression, weighted median and weighted mode. We searched at https://gwas.mrcieu.ac.uk/ using the keywords "COVID-19" for exposure data and "zoster" for outcome datasets. Results: We got 26 COVID-19 datasets and five zoster datasets. We used 26 COVID-19 datasets as exposure data corresponding to each zoster dataset for the MR analysis. There were nine datasets of COVID-19 where the number of SNPs was fewer than three in the MR analysis of the risk of HZ, varicella zoster virus (VZV) glycoprotein E and I antibody levels, anti-VZV IgG seropositivity, and post-zoster neuralgia. In addition, there were 10 datasets of COVID-19 where the number of SNPs was less than three in the MR analysis of anti-VZV IgG levels. The results of the MR analysis showed that all p-values were greater than 0.05. Sensitivity analysis revealed no evidence of horizontal pleiotropy in most two sample MR analyses. Conclusion: Our results indicate that there is no causal relationship between COVID-19 and varicella-zoster infection, HZ progression, and postherpetic neuralgia.

Body dysmorphic disorder symptoms in patients with melasma.

BACKGROUND: Body dysmorphic disorder (BDD) is a psychiatric condition characterized by extreme preoccupation with non-existent or minor defects in appearance, disrupting daily functioning. Melasma is a common concern among BDD patients with dermatological conditions. This study aimed to estimate the incidence and characteristics of BDD in patients with melasma, and compare the psychological condition of patients and age- and sex-matched healthy controls. METHODS: Patients with melasma and healthy controls were screened using the BDD Questionnaire (BDDQ), Self-rating Anxiety Scale (SAS), and Self-rating Depression Scale (SDS). A questionnaire was administered to collect demographic information and clinical characteristics. Standard statistical tests were conducted, such as descriptive analysis, chi-square, and nonparametric tests. The level of statistical significance for all tests was set at a P < 0.05. RESULTS: Among the 470 patients with melasma included in the study, 53 were positive for BDDQ in the preliminary screening and were associated with a history of treatment, higher Melasma Area and Severity Index (MASI), and Melasma Quality of Life (MELASQoL) scores, and higher SAS and SDS scores. The positive rate of BDDQ ranged from 0.4%, using the most stringent criteria to assess melasma severity, to 11.3%, without using objective criteria. Compared to healthy controls, patients with melasma had a higher positive rate of BDDQ and higher SAS and SDS scores. CONCLUSION: In patients with melasma who exaggerate the severity of the disease, psychiatric treatment and the patient-physician relationship have a positive effect. This study assessed the positive rate of BDDQ in melasma and proposed the feasibility of psychiatric treatment for patients with melasma.

Guanfacine for the Treatment of Attention-Deficit Hyperactivity Disorder: An Updated Systematic Review and Meta-Analysis.

Background: Non-stimulant guanfacine is a common second-line medication for attention-deficit hyperactivity disorder (ADHD). Numerous randomized controlled trials (RCTs) have explored the efficacy of guanfacine in ADHD treatment. This meta-analysis combined data from selected RCTs to analyze the efficacy and safety of guanfacine in treating ADHD. Methods: RCTs were identified from published sources through searches in PubMed, Cochrane Library, Web of Science, and Embase (up to February 2022), defining the Clinical Global Impression of Improvement (CGI-I) treatment response score of ≤2 as the primary outcome. Subgroup analysis was performed with a bound treatment duration of 10 weeks. Safety was defined by treatment-emergent adverse events (TEAEs). Results: Twelve out of 332 studies with 2653 participants were included. All studies compared guanfacine with placebos. Guanfacine was significantly more effective in treating ADHD (Risk Ratio [RR] 1.78, 95% CI: 1.59-2.01). In the <10 weeks subgroup, the efficacy in the guanfacine group compared with the placebo group was 58.5% versus 29.4%, respectively (RR 1.97, 95% CI: 1.71-2.26). In the >10 weeks subgroup, the efficacy in the guanfacine group compared with the placebo group was 63.6% versus 39.7%, respectively (RR 1.57, 95% CI: 1.37-1.79). Both subgroups lacked heterogeneity (I2 = 0), and a funnel plot showed a low publication bias risk. Around 80% of participants in the guanfacine group experienced at least one TEAE, compared with 66.5% in the placebo group (RR 1.23, 95% CI: 1.14-1.32), with low heterogeneity (I2 = 46, p = 0.05). The most common TEAEs in the guanfacine group were somnolence (38.6%), headaches (20.5%), and fatigue (15.2%). Conclusions: Guanfacine is safe and effective for treating ADHD, with no serious adverse events. Guanfacine should be considered as an effective treatment option where effectiveness or tolerability of the central nervous system stimulant is of concern. There is stronger evidence of efficacy for children; more clinical studies are needed for adults.

Reflectance Confocal Microscopy of Adult Periorificial Dermatitis: A Case Report.

Periorificial dermatitis (PD) is an inflammatory disorder of the facial skin that mainly occurs around the mouth and manifests as erythema, papules, pustules, scales and other lesions. Special attention is needed in the clinical diagnosis of PD to distinguish it from acne, seborrheic dermatitis (SD), granulomatous rosacea (GR), sarcoidosis and childhood granulomatous periorificial dermatitis (CGPD). We used reflectance confocal microscopy (RCM) images of a patient with PD to assist in the diagnosis of PD. RCM of PD showed slight oedema of the spinous layer. Numerous dendritic cells, scattered hair follicular keratotic plugging and hair follicle dilatation were observed. The dilation and congestion of superficial dermis blood vessels, an increasing vascular density and accelerated blood flow, and a greater abundance of infiltrated inflammatory cells were also detected.

Efficacy of photodynamic therapy for warts induced by human papilloma virus infection: A systematic review and meta-analysis.

BACKGROUND: The incidence of warts caused by human papilloma virus (HPV) infection is very high in the population. Photodynamic therapy (PDT), as an emerging method for wart treatment, has been demonstrated to be effective and safe by an increasing number of studies. This meta-analysis of previous literature aimed to investigate the potential of PDT as a first-line treatment for warts. METHODS: To acquire proper and accurate information from relevant literature, the four databases PubMed, Embase, Web of Science and the Cochrane Library were searched. The wart clearance rate and patient cure rate were analysed as the primary outcomes. The recurrence rate, patient satisfaction and adverse reactions were also recorded. RESULTS: A total of 19 randomized controlled trials (RCTs) were included based on our search strategy. In the hand and foot wart group, PDT showed a statistically significant improvement in the wart clearance rate compared with placebo (P = 0.02), other lasers (P < 0.0001), and cryotherapy (P < 0.009). PDT use in the condyloma acuminatum group was not superior in terms of the wart clearance rate, with a value lower than that of the carbon dioxide (CO2) laser (P = 0.003) and electrosurgical generator (P < 0.00001). However, all studies mentioned a significant decrease in the recurrence rate after PDT. In the plane wart group, PDT demonstrated its superiority over placebo (P = 0.003) and cryotherapy (P = 0.007) in terms of the cure rate. CONCLUSION: Our study demonstrated that PDT provided several benefits, including but not limited to positive clinical outcomes, low recurrence rates and minor adverse reactions. The use of PDT as first-line therapy can be recommended.

Water-stable porous Al24 Archimedean solids for removal of trace iodine.

In this paper, we report a unique type of core-shell crystalline material that combines an inorganic zeolitic cage structure with a macrocyclic host arrangement and that can remove trace levels of iodine from water effectively. These unique assemblies are made up of an inorganic Archimedean truncatedhexahedron (tcu) polyhedron in the kernel which possesses six calixarene-like shell cavities. The cages have good adaptability to guests and can be assembled into a series of supramolecular structures in the crystalline state with different lattice pore shapes. Due to the unique core-shell porous structures, the compounds are not only stable in organic solvents but also in water. The characteristics of the cages enable rapid iodine capture from low concentration aqueous I2/KI solutions (down to 4 ppm concentration). We have studied the detailed process and mechanism of iodine capture and aggregation at the molecular level. The facile synthesis, considerable adsorption capacity, recyclability, and ß- and γ-radiation resistance of the cages should make these materials suitable for the extraction of iodine from aqueous effluent streams (most obviously, radioactive iodide produced by atomic power generation).