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23. Poster Session
Cellular Receptors

Abstracts

#Title
103 Identification of HIV-2 Strains That Do Not Use CCR5 or CXCR4 to Enter in Peripheral Blood Mononuclear Cells
J. M. Azevedo-Pereira*1, Q. Santos-Costa1, K. Mansinho2, and J. Moniz-Pereira1
1Centro de Patogénese Molecular, Faculty of Pharmacy, Univ. of Lisbon, Portugal and 2Serviço de Doenças Infecciosas, Hosp. Egas Moniz, Portugal

104 Transcriptional Regulation of CCR3, an Entry Coreceptor for HIV-1: Evidence for a TATA-Less, Rare Human Promoter Element, Conserved between Drosophila and Humans
S. Vijh*1, D. E. Dayhoff1, C. Wang1, P. K. Ehrenberg1, and N. L. Michael2
1US Military HIV Res. Program and 2Walter Reed Army Inst. of Res., Rockville, MD, USA

105 Mechanisms of HIV-1 Resistance to Neutralization at the CD4 Binding Site: Implications for Vaccine
P. Bouma*, P. Zhang, E. Park, and G. Quinnan
Uniformed Services Univ. of the Hlth. Sci., Bethesda, MD, USA

106 A Post-CD4-Binding Step Involving the Central V3-Loop Region Is Common to Infection by X4 and R5 Strains of HIV-1
P. Nehete*1, M. Houssain1, N. Yahi2, J. Fantini2, and K. J. Sastry1
1The Univ. of Texas M. D. Anderson Cancer Ctr., Bastrop, USA and 2Inst. Mediterraneen de Recherche en Nutrition, Marseille, France

107 Direct Physical Association between Purified CCR5 and CD4
S. Phogat*, X. Xiao , L. Wilson, A. Phogat, and D. S. Dimitrov
NCI at Frederick, NIH, MD, USA

108 A Novel Virus Capture Assay Reveals a Differential Acquisition of Host HLA-DR by Clinical Strains of HIV-1 Expanded in Primary Human Cells Depending on the Nature of Producing Cells and Donor Source
G. Martin*, R. Cantin, and M. Tremblay
Univ. Laval, Sainte-Foy, Québec, Canada

109 Study of the Mechanism(s) Playing a Role in the Selective Incorporation of Host ICAM-1 Protein into HIV-1
Y. Beauséjour* and M. J. Tremblay
Laval Univ., Ste-Foy, Québec, Canada

110 Analysis of Coreceptor Usage among Sequential HIV-1 Subtype C Isolates from Acutely Infected Sex Workers in South Africa
M. Coetzer*1, T. Cilliers1, M. A. Papathanasopoulos1, G. Ramjee2, S. Abdool-Karim2, C. Williamson3, and L. Morris1
1Natl. Inst. for Virology, Johannesburg, South Africa; 2Med. Res. Council, Durban, South Africa; and 3Univ. of Cape Town, South Africa

111 CCR5 Expression and ?-Chemokine Production during Cord Monocyte Differentiation: Implications for HIV-1 Infection of Neonatal Monocytes/Macrophages
X. Wang*, D. Zylla, E. Bergenstal, S. D. Douglas, Y. Li, J. Merrill, S. E. Starr, and W. Z. Ho
The Children's Hosp. of Philadelphia, Univ. of Pennsylvania Sch. of Med., USA

112 CCR5-Specific Human Recombinant Monoclonal Antibodies Protect from HIV-1 Infection
C. Barassi1, S. Pollini2, C. Pastori1, M. Clerici3, G. Rossolini2, and L. Lopalco*1
1San Raffaele Scientific Inst., Milan, Italy; 2Univ. of Siena, Italy; and 3Univ. of Milan, Italy