Target intelligence / Profile preview

T Helper 1 Cell Response (Th1)

Target
Th1
Molecular classification
Immune response, Cell-mediated immunity
01

Overview

The Th1 (T helper type 1) T cell response is a specialized arm of the adaptive immune system, primarily mediated by CD4+ T cells that differentiate into Th1 cells. These cells orchestrate cell-mediated immunity, particularly targeting intracellular pathogens such as viruses, certain bacteria (e.g., Mycobacteria), and protozoa. The hallmark of the Th1 response is its proinflammatory nature and its ability to activate other immune effector cells.

Other names
T helper type 1 responseTh1 immune responseType 1 T helper cell response
02

Biological functions

Activation of macrophagesPromotion of cytotoxic T lymphocyte (CTL) responsesInduction of class switching in B cellsSecretion of cytokinesCell signaling
03

Disease associations

Autoimmune diseases (Type I diabetes, Crohn's disease)Infection (intracellular pathogens)InflammationDelayed-type hypersensitivityCancer (anti-tumor immunity)
04

Safety considerations

Overactive Th1 responses leading to autoimmunityBalance between Th1 and Th2 responsesInflammation
05

Biomarkers

IFNγ levelsIL-2 levelsT-bet expressionSTAT4 phosphorylation

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