The impact of hormones in autoimmune cutaneous diseases.

INTRODUCTION: Dermatomyositis, systemic and cutaneous lupus erythematosus have a significantly higher prevalence in women than men, emphasizing the relevance of exploring the relationship between sex hormones and autoimmune skin diseases. This review analyzes the interplay between sex hormones and these two skin diseases. MATERIALS AND METHODS: We performed an extensive literature search using the PubMed database from July to August 2023. Search terms included 'contraceptives', 'pregnancy', 'hormone replacement', 'tamoxifen', and 'aromatase inhibitors'. RESULTS AND DISCUSSION: This comprehensive literature review shows that there remains considerable debate regarding the use of hormonal contraceptives and hormonal replacement therapy in individuals with autoimmune skin conditions. Nonetheless, it is well established that their use is contraindicated in patients with antiphospholipid syndrome or when antiphospholipid antibodies are positive. Individuals experiencing disease flares and uncontrolled symptoms should also avoid these interventions. Pregnancy planning should be timed to coincide with well-managed disease states to minimize obstetric and neonatal complications. Hormonal breast cancer treatment requires close skin monitoring. CONCLUSION: Pregnancy, menopause, contraceptive use, hormone replacement therapy, and breast cancer treatment drugs result in substantial shifts in hormone levels. Additionally, hormone levels are altered by aromatase inhibitors and anti-estrogen medications. These fluctuations can modulate mechanisms influencing autoimmune skin abnormalities.

Perceptions of Infection Risk With Immunomodulatory Medications.

OBJECTIVES: Physicians of many specialties encounter patients treated with immunomodulatory medications and must weigh the risk of infection when making medical decisions. We explored how physician perceptions of the infection risk of immunomodulatory medications differ by specialty and level of experience. METHODS: A survey was distributed to physicians from the internal medicine, family medicine, emergency medicine, rheumatology, dermatology, and infectious disease departments at 1 tertiary care institution. Physicians scored their level of concern for the risk of infection of 15 commonly used immunomodulatory medications hypothetically taken for 1 year. RESULTS: The survey was distributed to 634 people; 197 physicians completed the survey. Opinion of the risk of infection differed significantly by specialty for 8 of 15 medications. Experienced providers rated risk of infection differently from less experienced providers for prednisone 10 to 20 mg (P = 0.046), hydroxychloroquine (P = 0.013), dapsone (P = 0.029), and anti-tumor necrosis factor (TNF) therapy (P = 0.027). Most experienced physicians regarded dapsone (95%) and hydroxychloroquine (93%) as low risk, whereas many less experienced physicians scored them as medium- or high-risk medications. In contrast, experienced physicians were more likely to rate prednisone 10 to 20 mg as medium or high risk. Most less experienced physicians (55%) identified anti-TNF therapy as high risk, whereas experienced physicians were split evenly among low, medium, and high risk. CONCLUSIONS: There is substantial variability in physician perception of the risk of infection of many immunomodulatory medications. Experienced physicians are more concerned than peers about the risk of infection of intermediate doses of prednisone. Opinions regarding anti-TNF therapy range broadly even among experienced providers.

A comparison of vascular inflammation in psoriasis, rheumatoid arthritis, and healthy subjects by FDG-PET/CT: a pilot study.

OBJECTIVE: Psoriasis (PSO) and rheumatoid arthritis (RA) increase cardiovascular diseases (CVD) beyond traditional risk factors. Vascular inflammation has previously been demonstrated to be present in PSO and RA using [18F]-fluorodeoxyglucose-positron emission tomography/computed tomography (FDG-PET/CT) imaging. However, vascular inflammation has not been compared in these two disorders relative to a healthy reference population. Thus, vascular inflammation was quantitatively assessed in patients with PSO (n=10), RA (n=5), and healthy subjects (n=10) using FDG-PET/CT. METHODS: FDG-PET/CT mean standardized uptake value (SUVmean) was determined slice by slice within the ascending, aortic arch, descending thoracic, suprarenal abdominal, and infrarenal abdominal aorta, and the mean metabolic volumetric product (MVPmean) was then calculated for each aortic subsegment. Plasma lipids and metabolic and inflammatory markers were also assessed. RESULTS: CVD risk profiles were largely similar across groups. After adjustment for CV risk factors, regional aortic vascular inflammation based on MVPmean was elevated for both PSO (beta coefficients 0.31-1.47, p<0.001) and RA (beta coefficients 0.15-0.69, p<0.05) compared to healthy subjects. CONCLUSIONS: These observations using FDG-PET/CT to estimate vascular inflammation support epidemiological findings of premature atherosclerosis in PSO and RA. The use of FDG-PET/CT to investigate vascular inflammation across systemic inflammatory diseases warrants further examination in larger study populations.

Self-assembly of mesoscopic materials to form controlled and continuous patterns by thermo-optically manipulated laser induced microbubbles.

The formation of continuous patterns of nanostructured materials using directed self-assembly under external fields has generated considerable current research interest. We demonstrate for the first time such continuous patterning by inducing irreversible self-assembly leading to nucleation in mesocopic materials (inorganic, organic, and nanoparticles) using a tightly focused laser beam in an optical tweezers apparatus. A dense aqueous dispersion or solution of the material which has high absorption at the laser wavelength is taken in a sample holder so that some material is adsorbed on the top surface. A hot spot is created on the top surface when the adsorbed material absorbs the high intensity at the focus of the laser beam (a submicrometer sized spot), due to which a water vapor bubble is formed. This causes self-assembly of material around the bubble due to Gibbs-Marangoni convection and capillary flow after which the material eventually nucleates into a crystalline state. The bubble is "trapped" at the hot spot due to the temperature gradient around it and can be manipulated by thermal forces generated optically, so that the system may be described as a "thermo-optical" tweezers. We translate the trapped bubble using the microscope sample holder stage of the apparatus so that the nucleation site of the material is simultaneously translated generating continuous patterns. We have demonstrated the technique using exotic inorganic materials such as soft oxometalates, an organic material such as glycine, and a fluorescent dye such as perylene as well as with carbon nanotubes. We have written patterns over lengths of nearly 1 mm at the rate of 1 Hz, with best resolution of about 4 µm. The technique has potential for a wide range of applications ranging from solution processed printable electronics to controlled catalysis.

Decreased effector memory CD45RA+ CD62L- CD8+ T cells and increased central memory CD45RA- CD62L+ CD8+ T cells in peripheral blood of rheumatoid arthritis patients.

Although a role for CD8+ T cells in the pathogenesis of rheumatoid arthritis (RA) has been suggested, the precise nature of their involvement is not fully understood. In the present study we examined the central and effector memory phenotypes of CD4+ and CD8+ T cells in the peripheral blood of patients with RA and systemic lupus erythematosus. Terminally differentiated effector memory CD45RA+CD62L-CD8+ T cells were significantly decreased in RA patients, whereas the central memory CD45RA-CD62L+ CD8+ T-cell population was increased as compared with levels in healthy control individuals. Naïve and preterminally differentiated effector memory CD45RA-CD62L- CD8+ T cells did not differ between RA patients and control individuals. The CD45RA-CD62L+ central memory CD4+ T-cell subpopulation was increased in RA patients, whereas the naïve and effector memory phenotype of CD4+ T cells did not differ between RA patients and control individuals. In patients with systemic lupus erythematosus the distribution of naïve/memory CD4+ and CD8+ T cells did not differ from that in age- and sex-matched control individuals. These findings show that peripheral blood CD8+ T cells from RA patients exhibit a skewed maturation phenotype that suggests a perturbation in the homeostasis of these cells. The central memory CD45RA-CD62L+ CD4+ and CD8+ T-cell numbers were increased in RA, suggesting an accelerated maturation of naïve T cells. The decreased numbers of terminally differentiated CD45RA+CD62L- effector memory CD8+ T cells in peripheral blood of RA patients may reflect increased apoptosis of these cells or enhanced migration of these cells to sites of inflammation, which may play a role in the pathogenesis of RA.