Evolving complexity of complement-related diseases: C3 glomerulopathy and atypical haemolytic uremic syndrome

H Terence Cook1

  • 1Department of Medicine, Imperial College London, London, UK.

Insights

Recent advances clarify the pathology of C3 glomerulopathy and atypical haemolytic uremic syndrome (aHUS), revealing complement alternative pathway dysregulation. New insights suggest therapeutic targets for these kidney diseases.

Area of Science:

  • Nephrology
  • Immunology
  • Complement System Biology

Background:

  • C3 glomerulopathy and atypical haemolytic uremic syndrome (aHUS) are kidney diseases linked to complement alternative pathway dysregulation.
  • Understanding their pathogenesis is crucial for developing effective treatments.

Purpose of the Study:

  • To review recent advances in the pathology of C3 glomerulopathy and aHUS.
  • To explore new insights into classification and pathogenesis.
  • To highlight emerging therapeutic strategies targeting the complement cascade.

Main Methods:

  • Literature review of recent articles on C3 glomerulopathy and aHUS.
  • Analysis of new findings on complement pathway abnormalities.
  • Synthesis of evidence regarding monoclonal gammopathy and treatment.

Main Results:

  • New insights into C3 glomerulopathy classification and its relationship with immune complex-mediated glomerulonephritis.
  • Evidence for overlap in pathogenesis between C3 glomerulopathy and aHUS.
  • Growing evidence linking monoclonal gammopathy to C3 glomerulopathy/aHUS in older patients, with potential for treatment of the plasma cell clone to improve kidney outcomes.

Conclusions:

  • Recent research has significantly advanced the understanding of C3 glomerulopathy and aHUS.
  • Complement dysregulation is a key factor, with novel therapeutic agents emerging.
  • Monoclonal gammopathy represents an important treatable cause in specific patient populations.
Abstract

Related Concept Videos

Complement System01:27

Complement System

The complement system is a group of approximately 20 plasma proteins that strengthen the body's defenses against infections through opsonization, inflammation, and cell lysis. Opsonization involves coating pathogens with complement proteins, making them more recognizable and facilitating phagocyte engulfment. Certain complement proteins induce inflammation that attracts immune cells to the site of infection. Cell lysis involves the destruction of pathogens through the formation of a...
11.0K
Complementation Tests00:49

Complementation Tests

A complementation test is a simple cross to identify whether the two mutations are located on the same gene or different genes. It was first performed by Edward Lewis in the 1940s while working on fruit flies. He developed the test to identify the location and arrangement of different mutations on chromosomes.
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...
6.3K
Antipsychotic Drugs: Typical and Atypical Agents01:21

Antipsychotic Drugs: Typical and Atypical Agents

Antipsychotic drugs are classified into first-generation (typical) drugs including phenothiazines; and second-generation (atypical) drugs. Chlorpromazine hydrochloride (Thorazine), a phenothiazine derivative, broadly impacts the central, autonomic, and endocrine systems. This drug, along with typical agents like haloperidol (Haldol), primarily works by antagonizing D2 receptors, thus reducing dopaminergic neurotransmission. However, typical antipsychotics can cause side effects such as sedation...
927
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
3.0K
Protein Complex Assembly02:41

Protein Complex Assembly

Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
16.9K
Complex Numbers01:29

Complex Numbers

The real number system cannot represent the square root of a negative number, which restricts solutions for certain equations, such as quadratics with negative discriminants. To address this, the complex number system was developed, introducing the imaginary unit i, where i = √(-1). This extension allows for the representation of all roots, including those involving negative radicands.A complex number is written in the form x + yi, where x and y are real numbers. Here, x represents the...
325