Regulation of Angiogenesis in Psoriasis by Dermal Mscs-Derived-EDIL3 via the Integrin Pathway

One of the earliest events in the development of psoriatic lesion is a vascular network expansion. The abnormal vascular network is associated with increased endothelial cells (ECs) survival, proliferation, adhesion, migration, angiogenesis and permeability in psoriatic lesion. Recently, researchers found that the dermal mesenchymal stem cells (DMSCs) in psoriatic lesion involved in course of psoriasis. Our prior study demonstrated the mRNA and protein expression of the epidermal growth factor (EGF)-like repeats and discoidin I-like domains 3 (EDIL3) which is an important angiogenic and anti-inflammatory mediator in DMSCs was significantly upregulated in psoriasis. So, this study aimed to explore the association between DMSCs-derived-EDIL3 and psoriasis-associated angiogenesis in vivo and in vitro. In the present study, we confirmed that in vitro DMSCs-derived-EDIL3 involved in the adhesion, migration and tube formation of ECs via integrin-FAK/MEK/ERK signaling. In vivo, this research found that after injected recombination EDIL3 protein, the epidermis thickness and microvessel density were both elevated in the IMQ-induced psoriasis-like mouse model. Based on these results, we suggested that the modification of DMSCs, EDIL3 and integrin signal pathway might be a novel therapeutic strategy for psoriasis.

Psoriasis Lesion Detection Using Hybrid Seeker Optimization Based Image Clustering

Background: In recent years, there has been a massive increase in the number of people suffering from psoriasis. For proper psoriasis diagnosis, psoriasis lesion segmentation is a pre-requisite for quantifying the severity of this disease. However, segmentation of psoriatic lesion cannot be evaluated just by visual inspection as they exhibit inter and intra variability among the severity classes. Most of the approaches currently pursued by dermatologists are subjective in nature. The existing conventional clustering algorithm for objective segmentation of psoriasis lesion suffers from limitations of premature local convergence. Objective: An alternative method for psoriatic lesion segmentation with the objective analysis is sought in the present work. The present work aims at obtaining optimal lesion segmentation by adopting an evolutionary optimization technique which possesses a higher probability of global convergence for psoriasis lesion segmentation. Method: A hybrid evolutionary optimization technique based on the combination of two swarm intelligence algorithms; namely Artificial Bee Colony and Seeker Optimization algorithm has been proposed. The initial population for the hybrid technique is obtained from the two conventional local-based approaches i.e. Fuzzy C-means and K-means clustering algorithms. Results: The initial population selection from the convergence of classical techniques reduces the effect of population dynamics on the final solution and hence yields precise lesion segmentation with Jaccard Index of 0.91 from 720 psoriasis images. Conclusion: The performance comparison reflects the superior performance of the proposed algorithm over other swarm intelligence and conventional clustering algorithms.

Weighted gene coexpression network and experimental analyses identify lncRNA SPRR2C as a regulator of the IL-22-stimulated HaCaT cell phenotype through the miR-330/STAT1/S100A7 axis

Psoriasis is a chronic inflammatory disease of the skin with highly complex pathogenesis. In this study, we identified lncRNA SPRR2C (small proline-rich protein 2C) as a hub gene with a critical effect on the pathogenesis of psoriasis and response to treatment using both weighted gene coexpression network analysis (WGCNA) and differential expression analysis. SPRR2C expression was significantly upregulated in both psoriatic lesion samples and HaCaT cell lines in response to IL-22 treatment. After SPRR2C knockdown, IL-22-induced suppression of HaCaT proliferation, changes in the KRT5/14/1/10 protein levels, and suppression of the IL-1β, IL-6, and TNF-α mRNA levels were dramatically reversed. In the coexpression network with SPRR2C based on GSE114286, miR-330 was significantly negatively correlated with SPRR2C, while STAT1 and S100A7 were positively correlated with SPRR2C. By binding to miR-330, SPRR2C competed with STAT1 and S100A7 to counteract miR-330-mediated suppression of STAT1 and S100A7. MiR-330 overexpression also reversed the IL-22-induced changes in HaCaT cell lines; in response to IL-22 treatment, miR-330 inhibition significantly attenuated the effects of SPRR2C knockdown. STAT1 and S100A7 expression was significantly upregulated in psoriatic lesion samples. The expression of miR-330 had a negative correlation with the expression of SPRR2C, while the expression of SPRR2C had a positive correlation with the expression of STAT1 and S100A7. Thus, SPRR2C modulates the IL-22-stimulated HaCaT cell phenotype through the miR-330/STAT1/S100A7 axis. WGCNA might uncover additional biological pathways that are crucial in the pathogenesis and response to the treatment of psoriasis.

A peristomal plaque of sudden occurrence

Koebner phenomenon regards the formation of a psoriatic lesion after a trauma, including tattoo, insect bite or other injuries. Although this manifestation is not specific for psoriasis, physicians should be aware because early recognition may be helpful in making the diagnosis when present.

Profiles of patients with psoriasis for appointment gene-engineering biological therapy — clinical justification

Psoriasis is a chronic immune-mediated disease with predominant damage to the skin and musculoskeletal system. This paper describes the clinical manifestations of psoriasis requiring a special therapeutic approach. The profiles of patients who showed the early assignment of genetic engineering biological therapy: patients with moderate and severe psoriasis, with rashes of problem localization (skin of the face, scalp, genital area and palmar-plantar region), with severe psoriatic lesion of the nail plates, as well as psoriatic arthritis. Clinical cases of rapid and pronounced resolution of rashes with the use of the new drug netakimab (Efleira) in a dosage of 120 mg according to the standard regimen psoriasis patients with indications for systemic or phototherapy.

Peculiarities of local blood microcirculation in patients with the psoriasis

The purpose of this work is to diagnose microcirculatory disorders in the tissues of psoriatic plaques in patients with psoriasis. Material and methods. Using the method of laser Doppler flowmetry (LDF), local hemodynamic parameters were studied in the place of psoriatic lesion of tissue and in uninvolved skin. Results. In the psoriatic plaque, there is an increase in average perfusion, myogenic and cardiac fluctuations, as well as nutritive blood flow as compared to the area of intact skin. Conclusions. The use of spectral analysis of the LDF signal has great potential for assessing the contribution of each link of the microvascular bed in the study the pathogenesis of psoriasis and evaluating the effectiveness of the therapy.