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Related Concept Videos

Skin Diseases and Disorders01:23

Skin Diseases and Disorders

Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
Type I Diabetes II: Pathophysiology01:26

Type I Diabetes II: Pathophysiology

Type 1 diabetes mellitus arises from an immune-mediated destruction of pancreatic β-cells, resulting in an absolute deficiency of insulin. This process develops in genetically susceptible individuals when autoimmunity, environmental exposures, and immunologic dysregulation converge to trigger a targeted attack on the insulin-producing cells of the pancreas. The β-cells are located within the islets of Langerhans and are essential for regulating blood glucose by facilitating cellular uptake of...
Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...
T Cell Types and Functions01:24

T Cell Types and Functions

When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...
Graves Disease II: Pathophysiology01:24

Graves Disease II: Pathophysiology

Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...

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Related Experiment Video

Updated: May 23, 2026

Studying Chronic Exposure of Mice to Ultraviolet B Radiation
03:20

Studying Chronic Exposure of Mice to Ultraviolet B Radiation

Published on: August 19, 2025

Neuro-immuno-endocrine processes in vitiligo pathogenesis.

A Miniati, Z Weng, B Zhang

    International Journal of Immunopathology and Pharmacology
    |April 18, 2012
    PubMed
    Summary

    Vitiligo, a skin depigmentation disorder, affects 2% of the population. New research suggests neuropeptides and cytokines may damage melanocytes, offering insights into vitiligo pathogenesis.

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    Last Updated: May 23, 2026

    Studying Chronic Exposure of Mice to Ultraviolet B Radiation
    03:20

    Studying Chronic Exposure of Mice to Ultraviolet B Radiation

    Published on: August 19, 2025

    Area of Science:

    • Dermatology
    • Immunology
    • Neuroscience

    Background:

    • Vitiligo is a depigmentation skin disorder affecting up to 2% of the population, particularly younger individuals.
    • The precise pathogenesis of vitiligo remains unclear despite research into genetic, immune, and oxidative stress factors.

    Discussion:

    • This study explores prevailing theories on vitiligo pathogenesis.
    • It proposes a novel hypothesis involving the interaction of neuropeptides and cytokines in melanocyte damage.

    Key Insights:

    • Neuropeptides like corticotropin-releasing hormone (CRH) and neurotensin (NT) may synergize with cytokines such as interleukin 33 (IL-33) and thymic stromal lymphopoietin (TSLP).
    • This synergistic action could adversely affect melanocyte function and viability, contributing to vitiligo lesions.

    Outlook:

    • The proposed hypothesis offers a new avenue for understanding melanocyte damage in vitiligo.
    • Further research into these neuropeptide-cytokine interactions may lead to novel therapeutic strategies for vitiligo treatment.