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Related Concept Videos

Bioactivation and Tissue Toxicity01:25

Bioactivation and Tissue Toxicity

Bioactivation is a metabolic process that transforms less reactive substances into highly reactive metabolites, initiating tissue toxicity. This transformation can lead to various toxic effects, including carcinogenesis and teratogenesis. Reactive metabolites are classified into two main types: electrophiles and free radicals.Electrophiles are electron-deficient species and are produced primarily by the enzyme cytochrome P-450 during the metabolism of compounds containing carbon, nitrogen, or...
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Drug toxicities can be stratified into pharmacological, pathological, or genotoxic based on their mechanisms. The incidence and severity of these toxicities generally increase with the drug's concentration in the body and exposure time.Pharmacological toxicity is evident when the therapeutic effects of drugs overshoot into adverse reactions in a predictable, dose-dependent manner. Central nervous system (CNS) depression from barbiturates is a classic example, with effects escalating from...
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Cellular Injury I: Introduction01:00

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Related Experiment Video

Updated: May 10, 2026

Modeling Hypoxia/Reoxygenation Injury in Proximal Tubular Epithelial Cells
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Published on: November 21, 2025

Danger control programs cause tissue injury and remodeling.

Jan H Hagemann1, Holger Haegele, Susanna Müller

  • 1Nephrologisches Zentrum, Medizinische Klinik und Poliklinik IV der Ludwig-Maximilians Universität, München 80336, Germany. hjanders@med.uni-muenchen.de.

International Journal of Molecular Sciences
|June 14, 2013
PubMed
Summary
This summary is machine-generated.

Evolutionary conserved danger control programs, including clotting and healing, underlie tissue pathologies after injury. Understanding these conserved responses can reveal new therapeutic targets for organ dysfunction.

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Area of Science:

  • Pathophysiology
  • Evolutionary Biology
  • Regenerative Medicine

Background:

  • Tissue injuries trigger conserved danger control programs crucial for survival in early multicellular organisms.
  • These programs include hemostasis (clotting), host defense, re-epithelialization, and mesenchymal repair.
  • Dysregulation of these fundamental responses contributes to a wide range of tissue pathologies.

Purpose of the Study:

  • To explain the pathophysiological impact of evolutionary conserved danger control programs on tissue pathology.
  • To illustrate how these programs, when dysregulated, lead to organ-specific pathologies, using kidney disease as a model.
  • To highlight the therapeutic potential of understanding these ancient survival mechanisms.

Main Methods:

  • Review and synthesis of existing literature on danger control programs and tissue repair.
  • Pathophysiological analysis of conserved responses in the context of injury and remodeling.
  • Case study focusing on kidney pathology to demonstrate the role of clotting, inflammation, epithelial healing, and fibrosis.

Main Results:

  • Identified four core danger control programs: hemostasis, host defense, re-epithelialization, and mesenchymal repair.
  • Demonstrated that kidney pathology spectrum is shaped by the interplay of clotting, inflammation, epithelial healing, and fibrosis/sclerosis.
  • Highlighted that insufficient or excessive activation of these programs drives pathology.

Conclusions:

  • The evolutionary conserved danger control programs are fundamental to understanding tissue pathology after injury and during remodeling.
  • Dysregulated activation of these ancient responses contributes significantly to organ dysfunction.
  • Targeting these conserved pathways offers a promising strategy for developing novel therapies to mitigate organ damage.