Related Experiment Video
Updated: May 21, 2026
11:28
Imaging CD4 T Cell Interstitial Migration in the Inflamed Dermis
Published on: March 25, 2016
Type I IFNs at the interface between cutaneous immunity and epidermal remodeling
Curdin Conrad1, Michel Gilliet
1Department of Dermatology, Lausanne University Hospital of Lausanne, Lausanne, Switzerland.
The Journal of Investigative Dermatology
|June 15, 2012
Summary
Type I interferons (IFNs) enhance skin healing by boosting keratinocyte response to IL-22. This dual action supports immune activation and epidermal remodeling following injury.
Area of Science:
- Immunology
- Dermatology
- Cell Biology
Background:
- Type I interferons (IFNs) are crucial cytokines for antiviral defense.
- They are produced by plasmacytoid dendritic cells and induced by viral infections or skin wounds.
- Their role in skin homeostasis and repair is not fully understood.
Purpose of the Study:
- To investigate the role of type I IFNs in epidermal remodeling.
- To identify the molecular mechanisms linking type I IFNs to keratinocyte function.
Main Methods:
- Analysis of gene expression in keratinocytes.
- Assessment of IL-22 receptor (IL-22R) expression.
- Evaluation of Stat3 phosphorylation in response to IL-22.
Main Results:
- Type I IFNs specifically upregulate IL-22R expression on keratinocytes.
- This upregulation enhances IL-22-mediated Stat3 phosphorylation in keratinocytes.
- Type I IFNs promote keratinocyte responsiveness to IL-22.
Conclusions:
- Type I IFNs play a dual role in skin immunity and repair.
- They bridge immune activation and epidermal remodeling by modulating keratinocyte sensitivity to IL-22.
- These findings offer new insights into skin wound healing and inflammatory skin diseases.
Related Concept Videos
01:24T 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...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
01:26Type 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...
01:28Cells of the Innate Immune Response
The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
01:12Chronic Inflammation: Introduction
Chronic inflammation is a prolonged, dysregulated immune response that persists for weeks to years when the inciting stimulus is difficult to eradicate or when self‑antigens drive ongoing reactivity. Morphologically, it is defined by mononuclear cell infiltration, progressive tissue destruction, and concurrent attempts at healing via angiogenesis and fibrosis. Compared with acute inflammation, edema is less prominent while cellular infiltration predominates; triggers include persistent...
01:28Inflammatory Response
An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
01:12Renewal of Skin Epidermal Stem Cells
The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular cells,...