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Related Concept Videos

Patch Clamp01:18

Patch Clamp

Many fundamental cell functions such as muscle contraction and nerve transmission rely on the electrical signals produced by the movement of positively and negatively charged ions across the cell membrane. One competent method to record current flowing across the whole cell or single ion channel is the patch-clamp technique.
In this method, a glass micropipette containing electrolyte solution is tightly sealed against a small portion of the cell membrane. As a result, a patch of the cell...
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Long-patch Base Excision Repair

Since the discovery of the two BER pathways, there has been a debate about how a cell chooses one pathway over the other and the factors determining this selection. Numerous in vitro experiments have pointed out multiple determinants for the sub-pathway selection. These are:

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Related Experiment Video

Updated: Jun 20, 2026

Precision Implementation of Minimal Erythema Dose (MED) Testing to Assess Individual Variation in Human Inflammatory Response
06:31

Precision Implementation of Minimal Erythema Dose (MED) Testing to Assess Individual Variation in Human Inflammatory Response

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[Photopatch testing].

M Avenel-Audran1

  • 1Service de dermatologie, faculté de médecine, université d'Angers, CHU d'Angers, 4, rue Larrey, 49933 Angers cedex 09, France. maavenel-audran@chu-angers.fr

Annales De Dermatologie Et De Venereologie
|August 19, 2009
PubMed
Summary
This summary is machine-generated.

Photopatch testing aids in diagnosing skin conditions by differentiating between contact allergies and photoallergic reactions. This review details materials, UV exposure methods, and result interpretation for accurate photodermatological assessment.

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Minimal Erythema Dose (MED) Testing
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Last Updated: Jun 20, 2026

Precision Implementation of Minimal Erythema Dose (MED) Testing to Assess Individual Variation in Human Inflammatory Response
06:31

Precision Implementation of Minimal Erythema Dose (MED) Testing to Assess Individual Variation in Human Inflammatory Response

Published on: October 3, 2019

Minimal Erythema Dose (MED) Testing
06:24

Minimal Erythema Dose (MED) Testing

Published on: May 28, 2013

Area of Science:

  • Dermatology
  • Photobiology
  • Allergology

Context:

  • Photopatch testing is crucial for diagnosing photodermatoses.
  • Accurate diagnosis requires standardized testing protocols and materials.
  • Understanding photoallergy and phototoxicity is essential for patient management.

Purpose:

  • To provide a comprehensive review of photopatch testing methodologies.
  • To detail the materials and procedures for effective photopatch testing.
  • To clarify the interpretation of photopatch test results for various photodermatological conditions.

Summary:

  • This review analyzes photopatch test materials, including light-protected and UV-exposed (UVA/UVB) patches, with multiple readings.
  • It covers the interpretation of results to differentiate contact allergy, photoallergy, and phototoxicity.
  • The article lists standard and patient-specific photoallergens, UV exposure materials, and indications for photodermatological evaluation.

Impact:

  • Enhances diagnostic accuracy for photodermatological conditions.
  • Provides a standardized framework for performing and interpreting photopatch tests.
  • Aids clinicians in managing patients with suspected photoallergic or phototoxic reactions.