Search Results (107)

Background/Objectives: Porcine circovirus type 2 (PCV2) infection causes porcine circovirus disease (PCVD), a global immunosuppressive disease in pigs. Its clinical manifestations include post-weaning multisystemic wasting syndrome (PMWS) and porcine dermatitis and nephropathy syndrome (PDNS), which cause significant economic losses to the swine industry. The Cap protein, which is the major protective antigen of PCV2, can self-assemble to form virus-like particles (VLPs) in the insect baculovirus expression system. Few studies have compared the expression of Cap proteins in different baculovirus expression systems. Methods: In this study, we compared two commonly commercialized baculovirus construction systems with the Cap protein expression in various insect cells. Results: The results demonstrate that the flashBAC system expressed the Cap protein at higher levels than the Bac-to-Bac system. Notably, when expressing four copies of the Cap protein, the flashBAC system achieved the highest protein yield in High Five cells, where it reached 432 μg/mL at 5 days post-infection (dpi) with 27 °C cultivation. Animal experiments confirmed that the purified Cap protein effectively induced specific antibody production in mice and swine. Conclusions: This study provides critical data for optimizing the production of the PCV2 Cap protein, which is of great significance for reducing the production cost of PCV2 vaccines and improving the industrial production efficiency. Full article

Staphylococcus spp. skin colonization is involved in the pathogenesis of atopic dermatitis (AD). While coagulase-positive Staphylococcus aureus strains are known to worsen symptoms, the role of coagulase-negative staphylococci (CoNS) remains controversial. Further research is needed to clarify the pathogenicity of CoNS in AD patients. A study involving 329 children with AD (mean age: 4.89 years) assessed the frequency of staphylococcal colonization on affected skin, along with the toxin-producing properties and antibiotic resistance of isolated strains. Mild AD: Predominantly colonized by CoNS (especially S. epidermidis). Moderate/Severe AD: Showed a significant increase in S. aureus colonization. CoNS (including S. epidermidis) could produce enterotoxins (A, B, C) and toxic shock syndrome toxin-1 (TSST-1), though less frequently than S. aureus strains. In severe AD, the number of toxin-producing CoNS strains (especially enterotoxin A producers) was higher than in mild AD, and the number of non-toxin-producing strains was lower. CoNS exhibited higher resistance rates than S. aureus. Methicillin-resistant S. epidermidis (MRSE): 23.4%. Methicillin-resistant S. aureus (MRSA): 1.27%. CoNS may contribute to AD pathogenesis through toxin production (exacerbating inflammation) and antibiotic resistance (limiting treatment options). Severe AD may involve a synergistic effect between S. aureus and toxin-producing CoNS. Full article

Atopic dermatitis (AD) is a chronic, complex, and immunologically mediated skin disease. Its exact cause remains complex, multifaceted and yet to be discovered but is likely related to a combination of immunological, genetic and environmental factors. A medical literature search of PubMed (1992–present), Google Schoolar and Embase was performed using appropriate terms without date limitations in accordance with the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines. Nevertheless, chronic inflammation is believed to be a major player in the development of AD and a causative element in the development of metabolic syndrome (MetS). Metabolic syndrome is a cluster of common metabolic abnormalities including hypertension, insulin resistance, abdominal obesity, reduced high-density lipoprotein (HDL)–cholesterol levels and elevated triglyceride levels. High waist circumference is positively correlated with the risk of atopic dermatitis, but there is no significant correlation between adult-onset atopic dermatitis and hypertension. Some evidence suggests an association between AD and hypertension but only in patients with severe AD. On the other hand, the relationship between AD and hyperglycemia or AD and cholesterol levels seems inconclusive. The aim of this review is to present current knowledge on the association between atopic dermatitis and metabolic syndrome, including each of the components of metabolic syndrome. Full article

Background: Porcine circovirus disease (PCVD), caused by porcine circovirus (PCV), is a significant swine disease characterized by porcine dermatitis, nephrotic syndrome, and reproductive disorders in sows. Given the overlapping clinical presentations of PCV2, PCV3, and PCV4, a rapid and accurate method for their differential detection is essential. Methods: In this study, specific primers and probes were designed based on the conserved regions of the ORF1 genes of PCV2 and PCV4, as well as the ORF2 gene of PCV3. Results: A TaqMan triple real-time PCR method was developed, demonstrating excellent specificity, sensitivity, and repeatability, with limits of detection (LODs) of 53.3 copies/µL, 12.0 copies/µL, and 13.8 copies/µL for PCV2, PCV3, and PCV4, respectively. Using this method, 500 clinical porcine tissue samples collected from 23 provinces across China between 2023 and 2024 were analyzed. The results showed detection rates of 75.20% (376/500) for PCV2, 17.60% (88/500) for PCV3, and 4.40% (22/500) for PCV4. The detection rate of triple coinfections involving PCV2, PCV3, and PCV4 was 0.80% (4/500). PCV2 consistently presented significantly higher positive detection rates across all growth stages, and its viral copy number was significantly greater than those of PCV3 and PCV4 (* p < 0.05). Forty PCV2 ORF2 genes, fourteen PCV3 ORF2 genes, and three PCV4 ORF2 genes were identified. These included four PCV2a genotypes, thirty-five PCV2d genotypes, and one PCV2e genotypes; two PCV3a genotypes and six each of PCV3b and PCV3c genotypes; and two PCV4a genotypes and one of PCV4b genotype. Conclusions: The triple qPCR method established in this study provides a rapid, specific, and accurate approach for the detection and differentiation of PCV2, PCV3, and PCV4 genotypes. Full article

Feline atopic skin syndrome (FASS) is a common inflammatory and highly pruritic skin condition. It typically manifests according to one or more of four different clinical lesion patterns: miliary dermatitis, self-induced alopecia, head and neck pruritus, and eosinophilic granuloma complex. FASS is a chronic and relapsing condition that often persists for life. Effective management can be a significant challenge for both clinicians and owners. Here, we investigated whether diet could act as an adjunct to conventional medicated therapies to improve the management of FASS. We conducted a six-month randomised, placebo-controlled, double-blinded study on client-owned FASS cats to test a novel pet food formulation. The main variables followed were the veterinarian (FeDESI) and the owner (VAScat) assessing symptom severity, in addition to medication requirements. Compared to the control diet, the test diet not only ameliorated symptoms but also significantly reduced the dependency on medication. The VAScat metric was improved after 3 months (p = 1.6 × 10⁻⁴) and 6 months (p = 5.7 × 10⁻⁵) in the test group only, and the cats’ medication requirement significantly declined exclusively in the test group from month 2 onwards. The interpretation of the FeDESI results was hampered by high levels of variation, particularly in the control group. Nonetheless, in the test group, clinical scores showed evidence of improvement after 3 months (p = 0.037) and 6 months (p = 0.02), and no such improvement was detected in the control group. Overall, our findings suggest that tailored nutrition can significantly aid in the management of feline atopic skin syndrome. Full article

Mycosis fungoides (MF) and Sézary syndrome (SS) are the most prevalent forms of cutaneous T-cell lymphoma (CTCL) and are characterized by the proliferation of CD4⁺ T-helper cells. The pathogenesis of CTCLs involves a critical interaction between neoplastic cells and the tumor microenvironment. This interaction is driven not only by cytokines but also by surface proteins that mediate cell–cell contact. One such protein, OX40 (also known as CD134), is a member of the TNF receptor superfamily and serves as an induced costimulatory molecule that facilitates the interaction between T-cells and antigen-presenting cells. In this narrative review, we explore the literature surrounding the OX40–OX40L interaction in CTCLs, highlighting its pathogenic and prognostic significance. Additionally, we compare the expression and function of OX40–OX40L in chronic inflammatory skin diseases, such as atopic dermatitis and psoriasis, with their role in CTCLs. Finally, we provide an overview of the current state of therapeutic research, discussing the potential of targeting the OX40–OX40L axis in CTCL treatment. Full article

Background: Vitamin D is essential for neonatal health, with maternal vitamin D status crucial in fetal development and neonatal outcomes. During pregnancy, vitamin D is transferred to the fetus via the placenta, forming an initial reserve. Postnatally, neonates rely on maternal levels and supplementation due to limited sunlight exposure and immature skin synthesis. Objectives: This review evaluates neonatal vitamin D deficiency’s causes and clinical consequences, emphasizing its impact on newborn and infant health. Results: Maternal vitamin D levels strongly correlate with neonatal 25(OH)D concentrations, influencing birth weight, bone development, and overall health. Supplementation during pregnancy reduces the risk of severe deficiencies and rickets, particularly in exclusively breastfed infants who require daily supplementation of 400 IU. Formula-fed infants typically meet requirements through fortified formulas. Preterm infants are at a higher risk of complications like osteopenia and rickets, with mixed evidence on the effectiveness of higher supplementation doses. Vitamin D is critical in skeletal development, immune function, and protection against respiratory infections such as bronchiolitis and pneumonia. Deficiency is associated with respiratory distress syndrome (RDS), atopic dermatitis, and impaired bone mineralization due to reduced placental calcium transport. Conclusions: Vitamin D deficiency during pregnancy and infancy has significant clinical implications, including impaired skeletal and immune development. Maternal and neonatal supplementations are critical to prevent deficiencies, particularly in high-risk groups such as preterm and breastfed infants. Targeted strategies are essential to improve neonatal health outcomes and prevent complications. Full article

Peppers (Capsicum spp.) represent not only a plant with a demonstrated history of diverse medicinal applications but also a species having non-neglectable adverse effects potential. “Chili burn” or Hunan hand syndrome represents a type of contact dermatitis rarely appearing after using chili peppers. Here, a case of “chili burn” with no specific treatments or sequelae is presented. A young woman presented with contact dermatitis after first- and second-time dermal exposure to a chili pepper. A strong burning sensation appeared shortly after on the hands and around the mouth after exposure to the plant. The patient applied non-specific measures (hand washing with mild soap and rinsing the affected areas with acidic solutions) with minor improvement; finally, the “chili burn” resolved itself. No other medicines were applied, and no consequences were recorded. Although rare, the use of chili pepper has the potential to cause contact dermatitis. The awareness of medical professionals of this entity should provide adequate diagnosis and treatment for patients. Full article

Background: Omentin (omentin-1, intelectin-1, ITLN-1) is an adipokine considered to be a novel substance. Many chronic, inflammatory, or civilization diseases are linked to obesity, in which omentin plays a significant role. Methods: MEDLINE and SCOPUS databases were searched using the keywords “omentin” or “intelectin-1”. Then the most recent articles providing new perspectives on the matter and the most important studies, which revealed crucial insight, were selected to summarize the current knowledge on the role of omentin in a literature review. Results and Conclusions: The valid role of this adipokine is evident in the course of metabolic syndrome. In most cases, elevated omentin expression is correlated with the better course of diseases, including: type 2 diabetes mellitus, polycystic ovary syndrome, rheumatoid arthritis, metabolic dysfunction-associated steatotic liver disease, Crohn’s disease, ulcerative colitis, atherosclerosis, or ischemic stroke, for some of which it can be a better marker than the currently used ones. However, results of omentin studies are not completely one-sided. It was proven to participate in the development of asthma and atopic dermatitis and to have different concentration dynamics in various types of tumors. All of omentin’s effects and properties make it an attractive subject of research, considering still unexplored inflammation mechanisms, in which it may play an important role. Omentin was proven to prevent osteoarthritis, hepatocirrhosis, and atherosclerosis in mouse models. All of the above places omentin among potential therapeutic products, and not only as a biomarker. However, the main problems with the omentin’s research state are the lack of standardization, which causes many contradictions and disagreements in this field. Full article

Regulatory T cells (Tregs) play a central role in immune regulation and tolerance. The transcription factor FOXP3 is a master regulator of Tregs in both humans and mice. Mutations in FOXP3 lead to the development of IPEX syndrome in humans and the scurfy phenotype in mice, both of which are characterized by fatal systemic autoimmunity. Additionally, Treg dysfunction and FOXP3 expression instability have been implicated in nongenetic autoimmune diseases, including graft-versus-host disease, inflammatory bowel disease, rheumatoid arthritis, and multiple sclerosis. Recent investigations have explored FOXP3 expression in allergic diseases, revealing Treg alterations in food allergies, asthma, and atopic dermatitis. This review examines the multifaceted roles of FOXP3 and Tregs in health and various pathological states, including autoimmune disorders, allergic diseases, and cancer. Additionally, this review focuses on the impact of recent technological advancements in facilitating Treg-mediated cell and gene therapy approaches, including CRISPR/Cas9-based gene editing. The critical function of FOXP3 in maintaining immune homeostasis and tolerance to both self-antigens and alloantigens is emphasized. Considering the potential involvement of Tregs in allergic diseases, pharmacological interventions and cell-based immunomodulatory strategies may offer promising avenues for developing novel therapeutic approaches in this field. Full article

Background and Objectives: Gallbladder cancer (GBC) is a biologically aggressive malignancy characterised by poor survival outcomes often attributed to delayed diagnosis due to nonspecific clinical presentations. Paraneoplastic syndromes (PNSs), atypical symptoms caused by cancer itself, may serve as valuable indicators for timely diagnosis, particularly in malignancies with nonspecific features. Understanding the manifestations of PNSs in GBC is, therefore, critical. This systematic review collates case studies documenting the association of PNS with GBC, including subsequent management and clinical outcomes. Materials and Methods: A comprehensive search of PubMed, Embase, CINAHL, Web of Science, and Cochrane Library databases yielded 49 relevant articles. Upon searching other information sources, two more relevant articles were identified via citation sources. Results: The paraneoplastic syndromes were classified according to haematological (leukocytosis), dermatological (inflammatory myositis like dermatomyositis and polymyositis, acanthosis nigricans, Sweet’s syndrome, exfoliative dermatitis), neurological, metabolic (hypercalcemia, hyponatremia), and others (chorea). The analysis included the age, sex, and country of origin of the patient, as well as the time of PNS diagnosis relative to GBC diagnosis. Furthermore, common presenting complaints, investigations, and effectiveness of treatment modalities using survival time were assessed. Conclusions: While PNS management can offer some benefits, oncologic outcomes of GBC are largely poor. The majority of PNS in GBC are reported in advanced stages, and, hence, PNS has a minimal role in early diagnosis. PNS management can improve a patient’s quality of life, and thus recognition and treatment are important considerations in the holistic management of GBC patients. Full article

Hypertrophic lichen planus (HLP) is a chronic inflammatory skin condition defined by verrucous, pruritic, papules and plaques usually affecting the lower limbs. The diagnosis of HLP is primarily clinical. However, due to its feasible generalized presentation and similarities with other hypertrophic cutaneous disorders, histological evaluation is often necessary. Many dermatological conditions that present with a hypertrophic clinical appearance can arise from a histological lichenoid infiltrate (HCLI). Hence, we provide an overview of the clinical, histopathological, and prognostic features of selected HCLI, including HLP, hypertrophic lichenoid dermatitis, hypertrophic lichen sclerosus (HLS), lichen simplex chronicus (LSC), squamous cell carcinoma (SCC), keratoacanthoma (KA), pseudoepitheliomatous hyperplasia (PEH), viral warts, and lupus erythematosus/lichen planus (LE/LP) overlap. Choosing the appropriate procedure and the anatomical site for an incisional biopsy requires thoughtful consideration to ensure sufficient depth and improve diagnostic accuracy by identifying the histological features specific to each hypertrophic condition. Full article

Paraneoplastic dermatoses (PDs) belong to a group of rare and polymorphous dermatoses, and they can often be the first sign of underlying malignancies. Therefore, dermatologists should be able to identify skin features to identify earlier underlying neoplasms. Indeed, lack of familiarity with cutaneous clues of internal malignancies can lead to a delay in the diagnosis and an impairment of the prognosis of the patients. In this review, we described several PDs, including more common and rarer PD. Indeed, while malignant acanthosis nigricans, characterized by velvety, verrucous, hyperpigmented plaques that usually affect intertriginous areas, is a well-known PD, necrolytic migratory erythema is usually misdiagnosed because its clinical features can be similar to seborrheic dermatitis. Furthermore, we focused on two paradigmatic PDs, namely paraneoplastic autoimmune multiorgan syndrome (PAMS) and paraneoplastic dermatomyositis. Indeed, PAMS represents a paradigmatic form of obligate PD, which is always associated with an underlying neoplasm, while paraneoplastic dermatomyositis belongs to the facultative PD, which can be associated with neoplasia in a variable percentage of cases. Full article

Porcine circovirus type 3 (PCV3) is an emerging pathogen that causes porcine dermatitis, nephropathy syndrome-like symptoms, multisystemic inflammation, and reproductive failure. The PCV3 capsid (Cap) protein interacts with DDX21, which functions mainly through controlling interferon (IFN)-β levels. However, how the interaction between DDX21 and PCV3 Cap regulates viral replication remains unknown. In the present study, upon shRNA-mediated DDX21 depletion in PK-15 cells, we observed impaired PCV3 proliferation via a lentivirus-delivered system, as indicated by reduced replicase (Rep) protein levels and viral titers. Furthermore, DDX21 negatively regulated IFN-β and interferon-stimulated gene (ISG) levels, promoting PCV3 replication. Mechanistically, PCV3 Cap co-localized and interacted with DDX21, and the nuclear localization signal (NLS) of PCV3 Cap and ⁷⁶³GSRSNRFQNK⁷⁷² at the C-terminal domain (CTD) of DDX21 were indispensable to the interaction. Moreover, PCV3 infection prevented the repression of DDX21 to facilitate its pro-viral activity. Taken together, these results show that DDX21 promotes PCV3 replication by binding to the PCV3 Cap protein and prohibiting IFN-β response, which provides important insight on the prevention and control of PCV3 infection. Full article

Psoriasis is a chronic inflammatory condition that is polygenic and multisystemic, impacting approximately 2–3% of the global population. The onset of this disease is influenced by an intricate interplay of genetic and environmental factors, predisposing individuals to the psoriasis phenotype. The complex pathogenesis of psoriasis contains certain key aspects found in other autoinflammatory and autoimmune dermatological diseases. Among these, vitiligo, alopecia areata, hidradenitis suppurativa, vitiligo, connective tissue diseases, bullous dermatoses, and atopic dermatitis are conditions that share overlapping immune system dysfunction, making their relationship with psoriasis particularly significant. For our research, we explored various terms including “shared”, “concomitant”, “coincident”, “overlap”, “coexist”, and “concurrent”, in relation to conditions such as “psoriasis”, “alopecia areata”, “hidradenitis suppurativa”, “atopic dermatitis”, “vitiligo”, “bullous pemphigoid”, “pemphigus vulgaris”, “lupus erythematosus”, “dermatomyositis”, and “systemic sclerosis.” Additionally, we used specific search queries like “atopic dermatitis overlapping syndrome” and “psoriasis and vitiligo concomitant disease” in the PubMed and Web of Science databases. While distinct in their clinical presentation, the skin diseases related to psoriasis may become associated, complicating diagnosis and treatment. In this narrative review, the complex pathophysiology of psoriasis is described, along with its close relationship to other skin conditions. This review provides an exhaustive description of both immunological and non-immunological pathways contributing to their development. Understanding the intricate interconnection between psoriasis and these conditions is of interest to scientists in developing novel research directions and to clinicians in providing holistic care, as managing one condition may influence the course of others. Full article