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Updated: Aug 7, 2026

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production
Published on: March 2, 2014
Inhibition of interferon-gamma-induced major histocompatibility complex class I expression by certain
M Ramanathan1, M Lantz, R D MacGregor
1University of California, San Francisco, California.
Abstract:
We report that certain oligonucleotides are capable of inhibiting cell surface induction of the major histocompatibility complex class I (MHC-I) proteins by interferon-gamma in K562 cells. The inhibition by oligodeoxy-nucleotide I 5' GGG GTT GGT TGT GTT GGG TGT TGT GT-RNH2 is dose-dependent, with an EC50 24 hr after dosing of approximately 4 microM for 800 U/ml interferon-gamma. The reverse complement II 5' AC ACA ACA CCC AAC ACA ACC AAC CCC-RNH2 did not show activity. Oligodeoxynucleotide I inhibits induction of MHC-I by interferon-gamma, but does not inhibit induction by either interferon-alpha or interferon-beta. Four other oligodeoxynucleotides were also evaluated, and three showed activity against interferon-gamma at 25 microM.
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