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    Bonavida, B., Katz, J. and Gottlieb, M., Mechanism of defective NK cell activity in patients with acquired immunodeficiency syndrome (AIDS) and AIDS-related complex. I. Defective trigger on NK cells for NKCF production by target cells, and partial restoration by IL 2. J. Immunol .1986. 137: 11571163.
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    Katz, J. D., Mitsuyasu, R., Gottlieb, M. S., Lebow, L. T. and Bonavida, B., Mechanism of defective NK cell activity in patients with acquired immunodeficiency syndrome (AIDS) and AIDS-related complex. II. Normal antibody-dependent cellular cytotoxicity (ADCC) mediated by effector cells defective in natural killer (NK) cytotoxicity. J. Immunol. 1987. 139: 5560.
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    Oliva, A., Kinter, A. L., Vaccarezza, M., Rubbert, A., Catanzaro, A., Moir, S., Monaco, J., Ehler, L., Mizell, S., Jackson, R., Li, Y., Romano, J. W. and Fauci, A. S., Natural killer cells from human immunodeficiency virus (HIV)-infected individuals are an important source of CC-chemokines and suppress HIV-1 entry and replication in vitro. J. Clin. Invest .1998. 102: 223231.
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    Ahmad, R., Sindhu, S. T., Tran, P., Toma, E., Morisset, R., Menezes, J. and Ahmad, A., Modulation of expression of the MHC class I-binding natural killer cell receptors, and NK activity in relation to viral load in HIV-infected/AIDS patients. J. Med. Virol .2001. 65: 431440.
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    Ullum, H., Gotzsche, P. C., Victor, J., Dickmeiss, E., Skinhoj, P. and Pedersen, B. K., Defective natural immunity: an early manifestation of human immunodeficiency virus infection. J. Exp. Med .1995. 182: 789799.
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    Valentin, A., Rosati, M., Patenaude, D. J., Hatzakis, A., Kostrikis, L. G., Lazanas, M., Wyvill, K. M., Yarchoan, R. and Pavlakis, G. N., Persistent HIV-1 infection of natural killer cells in patients receiving highly active antiretroviral therapy. Proc. Natl. Acad. Sci. U S A 2002. 99: 70157020.
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    Scott-Algara, D., Vuillier, F., Cayota, A., Rame, V., Guetard, D., Moncany, M. L., Marasescu, M., Dauguet, C. and Dighiero, G., In vitro non-productive infection of purified natural killer cells by the BRU isolate of the human immunodeficiency virus type 1. J. Gen. Virol. 1993. 74: 725731.
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    Moretta, L., Biassoni, R., Bottino, C., Mingari, M. C. and Moretta, A., Human NK-cell receptors. Immunol. Today 2000. 21: 420422.
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    Moretta, A., Bottino, C., Vitale, M., Pende, D., Biassoni, R., Mingari, M. C. and Moretta, L., Receptors for HLA class I molecules in human natural killer cells. Annu. Rev. Immunol. 1996. 14: 619648.
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    Moretta, A., Bottino, C., Vitale, M., Pende, D., Cantoni, C., Mingari, M. C., Biassoni, R. and Moretta, L., Activating receptors and coreceptors involved in human natural killer cell-mediated cytolysis. Annu. Rev. Immunol. 2001. 19: 197223.
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    Biron, C. A., Nguyen, K. B. and Pien, G. C., Natural killer cells in antiviral defense: function and regulation by innate cytokines. Annu. Rev. Immunol. 1999. 17: 189220.
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    Sivori, S., Pende, D., Bottino, C., Marcenaro, E., Pessino, A., Biassoni, R., Moretta, L. and Moretta, A., NKp46 is the major triggering receptor involved in the natural cytotoxicity of fresh or cultured human NK cells. Correlation between surface density of NKp46 and natural cytotoxicity against autologous, allogeneic or xenogeneic target cells. Eur. J. Immunol. 1999. 29: 16561666.
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    Pende, D., Parolini, S., Pessino, A., Sivori, S., Augugliaro, R., Morelli, L., Marcenaro, E., Accame, L., Malaspina, A., Biassoni, R., Bottino, C., Moretta, L. and Moretta, A., Identification and molecular characterization of NKp30, a novel triggering receptor involved in natural cytotoxicity mediated by human natural killer cells. J. Exp. Med. 1999. 190: 15051516.
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    De Maria, A., Biassoni, R., Fogli, M., Rizzi, M., Cantoni, C., Costa, P., Conte, R., Mavilio, D., Ensoli, B., Cafaro, A., Moretta, A. and Moretta, L., Identification, molecular cloning and functional characterization of NKp46 and NKp30 natural cytotoxicity receptors in Macaca fascicularis NK cells. Eur. J. Immunol .2001. 31: 35463556.
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    Costello, R. T., Sivori, S., Marcenaro, E., Lafage-Pochitaloff, A., Mozziconacci, M.-J., Reviron, D., Gastaut, J.-A., Pende, D., Olive, D. and Moretta, A., Defective expression and function of natural killer-triggering receptors in patients with acute myeloid leukemia. Blood 2002. 99: 36613667.
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    Ruggeri, L., Capanni, M., Urbani, E., Perruccio, K., Shlomchik, W. D., Tosti, A., Posati, S., Rogaia, D., Frassoni, F., Aversa, F., Martelli, M. F. and Velardi, A., Effectiveness of donor natural killer cell alloreactivity in mismatched hematopoietic transplants. Science 2002. 295: 20972100.
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    Velardi, A., Ruggeri, L., Moretta, A. and Moretta, L., NK cells: a lesson from mismatched hematopoietic transplantation. Trends Immunol. 2002. 23: 438444.
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    Nicastri, E., Ercoli, L., Sarmati, L., d'Ettorre, G., Iudicone, P., Massetti, P., Vullo, V. and Andreoni, M., Human immunodeficiency virus-1 specific natural cellular immunity in HIV seronegative subjects with multiple sexual exposures to virus. J. Med. Virol. 2001. 64: 232237.
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    Ironson, G., Balbin, E., Solomon, G., Fahey, J., Klimas, N., Schneiderman, N. and Fletcher, M. A., Relative preservation of natural killer cell cytotoxicity and number in healthy AIDS patients with low CD4 cell counts. AIDS 2001. 15: 20652073.
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    Kottilil, S., Chun, T. W., Moir, S., Liu, S., McLaughlin, M., Hallahan, C. W., Maldarelli, F., Corey, L. and Fauci, S., Innate immunity in human immunodeficiency virus infection: effect of viremia on natural killer cell function, J. Imm. Dis. 2003. 187: 10381045.
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    Castriconi, R., Cantoni, C., Della Chiesa, M., Vitale, M., Marcenaro, E., Conte, R., Biassoni, R., Bottino, C., Moretta, L. and Moretta, A., Transforming growth factor beta 1 inhibits expression of NKp30 and NKG2D receptors: consequences for the NK-mediated killing of dendritic cells. Proc. Natl. Acad. Sci. U S A. 2003. 100: 41204125.
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    Poli, G., Kinter, A. L., Justement, J. S., Bressler, P., Kehrl, J. H. and Fauci, A. S., Transforming growth factor beta suppresses human immunodeficiency virus expression and replication in infected cells of the monocyte/macrophage lineage. J. Exp. Med. 1991. 173: 589597.
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    Gibellini, D., Zauli, G., Re, M. C., Milani, D., Furlini, G., Caramelli, E., Capitani, S. and La Placa, M., Recombinant human immunodeficiency virus type-1 (HIV-1) Tat protein sequentially up-regulates IL-6 and TGF-beta 1 mRNA expression and protein synthesis in peripheral blood monocytes. Br. J. Haematol. 1994. 88: 261267.