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Bovine type 1 and type 2 responses

W C Brown¹, A C Rice-Ficht, D M Estes

¹Department of Veterinary Microbiology and Pathology, Washington State University, Pullman 99164-7040, USA. wbrown@vetmed.wsu.edu

Veterinary Immunology and Immunopathology

|July 10, 1998

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The traditional Th1/Th2 immune response model is an oversimplification. Cattle immune cells often express multiple cytokines, challenging the distinct type 1 and type 2 response definitions.

Area of Science:

Immunology
Veterinary Science

Background:

The Th1/Th2 paradigm simplifies immune responses into cell-mediated (Th1) or humoral (Th2) types.
This framework aids in understanding immune biases and developing therapies.

Purpose of the Study:

To investigate the Th1/Th2 paradigm in cattle.
To define type 1 and type 2 immune responses in cattle.

Main Methods:

Analysis of over 60 parasite antigen-specific T helper (Th) cell clones from cattle.
Assessment of cytokine co-expression patterns (IL-4, IFN-gamma, IL-2, IL-10).

Main Results:

Most cattle Th cell clones coexpressed Interleukin-4 (IL-4) and Interferon-gamma (IFN-gamma), with rare polarized profiles.
Interleukin-2 (IL-2) and Interleukin-10 (IL-10) expression was not restricted to specific Th cell subtypes.

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Regulatory cytokines (IL-4, IL-10, IL-12) did not exclusively affect Th1-like cells.

Conclusions:

The strict Th1/Th2 classification is an oversimplification for cattle immune responses.
Immune responses in cattle exhibit a spectrum of phenotypes rather than distinct type 1 and type 2 categories.
Cytokine regulation in cattle differs from that observed in mice, suggesting a more complex immunoregulatory network.