Related Experiment Video

Updated: Jun 13, 2025

Conjunctival Commensal Isolation and Identification in Mice
07:52

Conjunctival Commensal Isolation and Identification in Mice

Published on: May 1, 2021

4.4K

Spectosis: Dying for a complement

Jared R Coombs1, Sabrina S Burgener1, Kate Schroder1

  • 1Institute for Molecular Bioscience, The University of Queensland, St Lucia QLD 4072, Australia.

Immunity
|June 11, 2025
PubMed

Insights

Researchers discovered a new programmed cell death pathway in red blood cells called spectosis. Complement activation triggers this process, leading to cell death and hemolysis in hemolytic diseases.

Area of Science:

  • Cellular biology
  • Immunology
  • Hematology

Background:

  • Red blood cells (RBCs) are crucial for oxygen transport.
  • Pathological cell death of RBCs contributes to hemolytic diseases.
  • Understanding RBC death mechanisms is vital for disease treatment.

Purpose of the Study:

  • To elucidate novel programmed cell death pathways in red blood cells.
  • To investigate the molecular mechanisms underlying spectosis.
  • To identify potential therapeutic targets for hemolytic diseases.

Main Methods:

  • Utilized advanced microscopy and biochemical assays.
  • Investigated complement activation pathways in RBCs.
  • Analyzed the role of (mini)NLRP3-caspase-8 complexes in cell death.

Main Results:

  • Identified a novel programmed cell death pathway termed spectosis in RBCs.
  • Demonstrated that complement activation initiates spectosis.
  • Showed that (mini)NLRP3-caspase-8 complexes are central to the spectosis pathway.
  • Linked spectosis to hemolysis in the context of disease.

Conclusions:

  • Spectosis represents a distinct mode of programmed RBC death.
  • Complement-mediated spectosis contributes to hemolysis in disease.
  • Targeting spectosis may offer new therapeutic strategies for hemolytic disorders.

More Related Videos

Digestion of Whole Mouse Eyes for Multi-Parameter Flow Cytometric Analysis of Mononuclear Phagocytes09:58

Digestion of Whole Mouse Eyes for Multi-Parameter Flow Cytometric Analysis of Mononuclear Phagocytes

Published on: June 17, 2020

4.9K
Depletion of Specific Cell Populations by Complement Depletion06:17

Depletion of Specific Cell Populations by Complement Depletion

Published on: February 5, 2010

22.1K

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...
2.3K
Humoral Immune Responses01:36

Humoral Immune Responses

Overview
72.2K
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
5.9K
Antibody Actions01:26

Antibody Actions

Antibodies, or immunoglobulins, are critical players in the immune system's arsenal against invading pathogens. Produced by B cells and plasma cells, their primary role is to detect and bind to specific antigens, molecules found on the surface of pathogens like bacteria or viruses. Beyond antigen recognition, antibodies perform several vital functions that contribute to immune defense.
Neutralization
Antibodies can bind to pathogens, preventing them from infecting host cells. This process...
1.1K
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...
4.9K
Antimicrobial Proteins01:23

Antimicrobial Proteins

Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
947