alexa Lysozyme and RNases as anti-HIV components in beta-core preparations of human chorionic gonadotropin.
Haematology

Haematology

Journal of Blood Disorders & Transfusion

Author(s): LeeHuang S, Huang PL, Sun Y, Huang PL, Kung HF,

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Abstract Human chorionic gonadotropin (hCG) preparations contain activity against HIV type 1 (HIV-1). However, there has been controversy about whether some biological activities of hCG beta-subunit (hCGbeta) preparations are caused by the beta-subunit itself or other proteins present in the preparations. We report here the purification, characterization, and identification of three enzymes with anti-HIV activity present in the beta-core fraction of hCGbeta prepared from the urine of pregnant women. The N-terminal amino acid sequence of one protein is identical to human urinary lysozyme C, and those of the other two are identical to human RNase A and urinary RNase U. We thus refer to these proteins as AVL (antiviral lysozyme) and AVR (antiviral RNases). In addition to HIV-1 inhibition, AVL is capable of lysing Micrococcus lysodeikticus. AVR digests a variety of RNA substrates, including RNA from HIV-1-infected cells. We also find that lysozyme from chicken egg white, human milk, and human neutrophils and RNase A from bovine pancreas possess activity against HIV-1. These findings may offer additional strategies for the treatment of HIV-1 infection.
This article was published in Proc Natl Acad Sci U S A and referenced in Journal of Blood Disorders & Transfusion

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