Causal relationship and mediation effects of immune cells and plasma metabolites in atopic dermatitis: A Mendelian randomization study.

Atopic dermatitis (AD) is a chronic inflammatory skin condition with complex etiology involving genetic, environmental, and immunological factors. This study employs Mendelian randomization to explore the causal relationships between immune cell phenotypes and AD, and the mediating effects of plasma metabolites. Using data from European cohorts, we identified 7 immune cell phenotypes significantly associated with AD.

Protection of Proanthocyanidins Against HSP Serum-Induced Inflammation and Oxidative Stress on Human Umbilical Vein Endothelial Cells.

Background: Immune-mediated inflammation and oxidative stress play pivotal roles in Henoch-Schonlein purpura (HSP), primarily through the TLR4/MyD88/NF-κB pathway. Proanthocyanidins (PCs) exert anti-inflammatory and antioxidant effects by regulating some signals like TLR4/MyD88/NF-κB. Previous research uncovered that PCs could alleviate purpura-like lesions and pathological changes on rats likely through attenuating inflammation and OS damage.

A newly improved method of primary cell culture: Tissue block with continuous adhesion subculture in skin fibroblast.

Background: Fibroblasts (FBs) have been widely used as a typical in vitro cell model for investigating the biological processes and cell pathophysiological mechanisms. However, FBs are prone to senescence in cell culture process after several passages. Thus, a new approach to cell culture is quite required to enhance the viability of cells.

Natural Plant Extract - Loganin: A Hypothesis for Psoriasis Treatment Through Inhibiting Oxidative Stress and Equilibrating Immunity via Regulation of Macrophage Polarization.

Psoriasis, a chronic immune-mediated inflammatory skin disease, influences approximately 2-3% of the world's population. At present, the etiology of psoriasis remains unclear and there is still no causal treatment available. Recent studies indicate that oxidative stress (OS) and T cells dysregulation may participate in the pathogenesis of psoriasis, among which M1-dominant macrophage polarization is a crucial contributor.

The protective effect of proanthocyanidins on the psoriasis-like cell models via PI3K/AKT and HO-1.

Background: Inflammation and oxidative stress (OS) are important contributors to psoriasis pathogenesis. Proanthocyanidins (PCs) have anti-inflammatory and anti-oxidative activities. Previously, we discovered that PCs alleviated psoriasis-like mice symptoms, likely via mitigating inflammation and OS damage.

An Emerging Role of on Psoriasis: Evidence from a Psoriasis-Like Mouse Model.

Background: Psoriasis is an immune-mediated, chronic inflammatory disease, and genetic, immune, oxidative stress (OS), and environmental factors are all thought to contribute to its occurrence. Proanthocyanidins (PCs) are natural flavonoids consisting of catechins and epicatechins which have anti-inflammatory and anti-OS activities. PCs have been widely used to treat various diseases, but reports regarding psoriasis are rare.

Current evidence to support the therapeutic potential of flavonoids in oxidative stress-related dermatoses.

Background: Skin, as a crucial external defense organ, is more vulnerable to oxidative stress (OS) insult, reactive oxygen species (ROS)-mediated OS in particular. OS results from a redox imbalance caused by various extrinsic stimuli and occurs once the oxidants production overwhelming the antioxidants capacity, through mediating in DNA damage, lipid peroxidation (LPO), protein oxidation and a serial of signaling pathways activation/inactivation, thereby offering favorable conditions for the occurrence and development of numerous diseases especially some dermatoses, e.g.

Proanthocyanidins as a Potential Novel Way for the Treatment of Hemangioma.

Hemangioma, the most common benign vascular tumor, not only affects the appearance and psychology but also has a life-threatening potential. It is considered that clonal vascular endothelial cell proliferation and excessive angiogenesis are responsible for hemangioma pathogenesis, in which abnormal cytokines/pathways are closely implicated, primarily including high expression of hypoxia-inducible factor-1 (HIF-1) and vascular endothelial growth factor (VEGF) as well as their downstream pathways, especially phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt). These further stimulate the migration and proliferation of vascular endothelial cells and promote the formation of new vessels, ultimately leading to the occurrence and development of hemangioma.

Regulating the Polarization of Macrophages: A Promising Approach to Vascular Dermatosis.

Macrophages, a kind of innate immune cells, derive from monocytes in circulation and play a crucial role in the innate and adaptive immunity. Under the stimulation of the signals from local microenvironment, macrophages generally tend to differentiate into two main functional phenotypes depending on their high plasticity and heterogeneity, namely, classically activated macrophage (M1) and alternatively activated macrophage (M2). This phenomenon is often called macrophage polarization.

Nrf2 Overexpression for the Protective Effect of Skin-Derived Precursors against UV-Induced Damage: Evidence from a Three-Dimensional Skin Model.

Background: Skin photodamage is associated with ultraviolet- (UV-) induced reactive oxygen species (ROS) overproduction and nuclear factor erythroid 2-related factor 2 (Nrf2) inactivation. In our previous study, skin-derived precursors (SKPs) were shown to ameliorate a UV-induced damage in mice, probably through Nrf2 activation and ROS scavenging.

Objective: To clarify the mechanism underlying the photoprotective effect of SKPs against UV-induced damage in a three-dimensional (3D) skin model.

Emerging Perspective: Role of Increased ROS and Redox Imbalance in Skin Carcinogenesis.

Strategies to battle malignant tumors have always been a dynamic research endeavour. Although various vehicles (e.g.

Emerging Roles of Redox-Mediated Angiogenesis and Oxidative Stress in Dermatoses.

Angiogenesis is the process of new vessel formation, which sprouts from preexisting vessels. This process is highly complex and primarily involves several key steps, including stimulation of endothelial cells by growth factors, degradation of the extracellular matrix by proteolytic enzymes, migration and proliferation of endothelial cells, and capillary tube formation. Currently, it is considered that multiple cytokines play a vital role in this process, which consist of proangiogenic factors (e.

Pruritus: Progress toward Pathogenesis and Treatment.

Pruritus, the most common cutaneous symptom, is widely seen in many skin complaints. It is an uncomfortable feeling on the skin and sometimes impairs patients' quality of life. At present, the specific mechanism of pruritus still remains unclear.

Proanthocyanidins against Oxidative Stress: From Molecular Mechanisms to Clinical Applications.

Proanthocyanidins (PCs) are naturally occurring polyphenolic compounds abundant in many vegetables, plant skins (rind/bark), seeds, flowers, fruits, and nuts. Numerous and studies have demonstrated myriad effects potentially beneficial to human health, such as antioxidation, anti-inflammation, immunomodulation, DNA repair, and antitumor activity. Accumulation of prooxidants such as reactive oxygen species (ROS) exceeding cellular antioxidant capacity results in oxidative stress (OS), which can damage macromolecules (DNA, lipids, and proteins), organelles (membranes and mitochondria), and whole tissues.

Proanthocyanidins: novel treatment for psoriasis that reduces oxidative stress and modulates Th17 and Treg cells.

Psoriasis is a common, chronic, inflammatory skin disease that affects 2%-4% of the global population. Recent studies have shown that increased oxidative stress (OS) and T-cell abnormalities are central to the pathogenesis of this disease. The resulting reactive oxygen species (ROS) induces proliferation and differentiation of Th17/Th1/Th22 cells and inhibits the anti-inflammatory activities of regulatory T lymphocytes (Treg).

Photoprotection against UV-induced damage by skin-derived precursors in hairless mice.

Background: Skin photodamage is associated with UV-induced overproduction of reactive oxygen species (ROS) and the inactivation of NF-E2-related factor 2 (Nrf2). Skin-derived precursor cells (SKPs), a population of dermal stem cells, are considered to be involved in wound repair and skin regeneration through the activation of Nrf2. However, no reports concentrate on the treatment of skin photodamage with SKPs.

Therapeutic Hotline. Oral allicin in the treatment of Behcet's disease through attenuating oxidative stress: A pilot study in 20 patients with mucocutaneous lesions.

Behçet's disease (BD) involves oxidative stress (OS) aggression and imbalanced oxidant/antioxidant status. Owing to its antioxidant property, allicin is proposed for treating BD. In this study, we aimed to investigate the efficacy and safety of allicin on patients with BD with mucocutaneous involvement.

Efficacy of Tripterygium hypoglaucum Hutch in adults with chronic urticaria.

Objectives: The study objectives were to evaluate the efficacy and safety of Tripterygium hypoglaucum Hutch (THH) in adult with severe chronic urticaria (CU) by performing a randomized, double-blind, placebo-controlled clinical trial.

Methods: Seventy-eight (78) adult patients with severe CU, 21-58 years of age, responding poorly to antihistamines alone, were randomly divided into two groups: the therapeutic group with THH 3 tablets 3 times daily (n = 40) and the control group with placebo 3 tablets 3 times daily (n = 38). Meanwhile, all patients jointly received cetirizine hydrochloride (HCl) 10 mg once daily throughout the study period.