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Evolutionary Psychology01:20

Evolutionary Psychology

Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the human psyche...
Evolution of New Traits in Microbes01:24

Evolution of New Traits in Microbes

Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...
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What is Evolutionary History?02:35

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Convergent Evolution01:54

Convergent Evolution

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Surface modification of cellulose with succinic anhydride in dimethyl sulfoxide using potassium carbonate as a catalyst.

Carbohydrate research·2023
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Exploration of chromophores for a VCD couplet in a spectrally transparent infrared region for biomolecules.

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Chiral organic stereochemistry: Chiral HPLC, chiral auxiliaries, CD spectroscopy, X-ray crystallography, and light-powered chiral molecular motors.

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Penetration of Singlet Oxygen into Films with Oxygen Permeability Coefficient Close to that of Skin.

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The enduring legacy of Koji Nakanishi's research on natural products and bioorganic chemistry. Part 2. Inception and establishment of the ECD exciton chirality method in 1960s to 1970s: A marvel of Nakanishi's Japanese team.

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Related Experiment Video

Updated: Jun 28, 2026

The Innovation Arena: A Method for Comparing Innovative Problem-Solving Across Groups
14:14

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Published on: May 13, 2022

[Evolution of IGRA researches].

Haruyuki Ariga1, Nobuyuki Harada

  • 1National Hospital Organization Tokyo National Hospital.

Kekkaku : [Tuberculosis]
|November 5, 2008
PubMed
Summary

Interferon-Gamma Release Assays (IGRAs) detect tuberculosis infection using Mtb-specific antigens ESAT-6 and CFP-10. These tests offer improved specificity over traditional methods and are being refined to distinguish active from latent TB and predict disease progression.

Area of Science:

  • Genomic analysis of Mycobacterium tuberculosis (Mtb) has identified specific antigens like ESAT-6 and CFP-10.
  • These antigens elicit a strong interferon-gamma (IFN-gamma) response from sensitized T cells.
  • This forms the basis for Interferon-Gamma Release Assays (IGRAs) for tuberculosis (TB) diagnosis.

Context:

  • Current diagnostic tests for TB infection, IGRAs, utilize Mtb-specific antigens ESAT-6 and CFP-10.
  • These antigens are absent in BCG vaccines and most non-tuberculous mycobacteria, enhancing diagnostic specificity.
  • Two main IGRAs exist: QuantiFERON-TB Gold (QFT-2G) approved in Japan, and T-SPOT.TB awaiting approval.

Purpose:

  • To review the progress and applications of Interferon-Gamma Release Assays (IGRAs) in tuberculosis diagnostics.
  • To discuss the potential of IGRAs in distinguishing active TB from latent TB infection (LTBI).
  • To explore the prognostic use of IGRAs and address current challenges and future directions.

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Summary:

  • IGRAs measure IFN-gamma production in response to Mtb-specific antigens, aiding in TB infection detection.
  • Research presented covers advancements in IGRA development, including use with non-blood specimens and identifying responding T cells.
  • Discussions also addressed QFT-2G applications in vulnerable populations, chemotherapy effects, disease prognosis, and quality assurance.

Impact:

  • IGRAs provide a more specific alternative to traditional TB testing, with ongoing research expanding their utility.
  • Potential exists to modify IGRAs to identify individuals at high risk for developing active TB from LTBI.
  • Further research and understanding of IGRA characteristics are crucial for optimizing their use in global TB control.