Temsavir (BMS-626529) is an attachment inhibitor (AI) in clinical development (administered as prodrug BMS-663068) that binds to HIV-1 gp120. Temsavir displays in vitro activity against HIV-1 envelopes with C-C chemokine receptor type 5 (CCR5-), C-X-C chemokine receptor type 4 (CXCR4), and dual tropism. It also is active against almost all HIV-1 subtypes tested except for subtype CRF01-AE and possibly group O. Temsavir can inhibit both CD4-induced and CD4-independent formation of the "open state" four-stranded gp120 bridging sheet, and the subsequent formation and exposure of the chemokine co-receptor binding site. This unique mechanism of action prevents the initial interaction of HIV-1 with the host CD4+ T cell, and subsequent HIV-1 binding and entry. Temsavir is administered as a phosphonooxymethyl ester prodrug (BMS-663068), which was developed to improve the solubility and dissolution of Temsavir. Temsavir is currently being investigated clinically through the use of the prodrug BMS-663068, and a Phase III study of BMS-663068 in HIV-1-infected treatment-experienced subjects is ongoing (NCT02362503).

Tromethamine is extensively used in biochemistry and molecular biology. Because tromethamine (in the form of R-NH2) is a proton acceptor with a pK of 7.8, it is an effective buffer that can be used to maintain the pH of body fluids. Tromethamine is indicated for the prevention and correction of metabolic acidosis. When administered intravenously as a 0.3 M solution, tromethamine acts as a proton acceptor and prevents or corrects acidosis by actively binding hydrogen ions (H+). It binds not only cations of fixed or metabolic acids, but also hydrogen ions of carbonic acid, thus increasing bicarbonate anion (HCO3‾). TromeThamine also acts as an osmotic diuretic, increasing urine flow, urinary pH, and excretion of fixed acids, carbon dioxide and electrolytes. A significant fraction of tromethamine (30% at pH 7.40) is not ionized and therefore is capable of reaching equilibrium in total body water. This portion may penetrate cells and may neutralize acidic ions of the intracellular fluid.

Temsavir (BMS-626529) is an attachment inhibitor (AI) in clinical development (administered as prodrug BMS-663068) that binds to HIV-1 gp120. Temsavir displays in vitro activity against HIV-1 envelopes with C-C chemokine receptor type 5 (CCR5-), C-X-C chemokine receptor type 4 (CXCR4), and dual tropism. It also is active against almost all HIV-1 subtypes tested except for subtype CRF01-AE and possibly group O. Temsavir can inhibit both CD4-induced and CD4-independent formation of the "open state" four-stranded gp120 bridging sheet, and the subsequent formation and exposure of the chemokine co-receptor binding site. This unique mechanism of action prevents the initial interaction of HIV-1 with the host CD4+ T cell, and subsequent HIV-1 binding and entry. Temsavir is administered as a phosphonooxymethyl ester prodrug (BMS-663068), which was developed to improve the solubility and dissolution of Temsavir. Temsavir is currently being investigated clinically through the use of the prodrug BMS-663068, and a Phase III study of BMS-663068 in HIV-1-infected treatment-experienced subjects is ongoing (NCT02362503).

Temsavir (BMS-626529) is an attachment inhibitor (AI) in clinical development (administered as prodrug BMS-663068) that binds to HIV-1 gp120. Temsavir displays in vitro activity against HIV-1 envelopes with C-C chemokine receptor type 5 (CCR5-), C-X-C chemokine receptor type 4 (CXCR4), and dual tropism. It also is active against almost all HIV-1 subtypes tested except for subtype CRF01-AE and possibly group O. Temsavir can inhibit both CD4-induced and CD4-independent formation of the "open state" four-stranded gp120 bridging sheet, and the subsequent formation and exposure of the chemokine co-receptor binding site. This unique mechanism of action prevents the initial interaction of HIV-1 with the host CD4+ T cell, and subsequent HIV-1 binding and entry. Temsavir is administered as a phosphonooxymethyl ester prodrug (BMS-663068), which was developed to improve the solubility and dissolution of Temsavir. Temsavir is currently being investigated clinically through the use of the prodrug BMS-663068, and a Phase III study of BMS-663068 in HIV-1-infected treatment-experienced subjects is ongoing (NCT02362503).

Temsavir (BMS-626529) is an attachment inhibitor (AI) in clinical development (administered as prodrug BMS-663068) that binds to HIV-1 gp120. Temsavir displays in vitro activity against HIV-1 envelopes with C-C chemokine receptor type 5 (CCR5-), C-X-C chemokine receptor type 4 (CXCR4), and dual tropism. It also is active against almost all HIV-1 subtypes tested except for subtype CRF01-AE and possibly group O. Temsavir can inhibit both CD4-induced and CD4-independent formation of the "open state" four-stranded gp120 bridging sheet, and the subsequent formation and exposure of the chemokine co-receptor binding site. This unique mechanism of action prevents the initial interaction of HIV-1 with the host CD4+ T cell, and subsequent HIV-1 binding and entry. Temsavir is administered as a phosphonooxymethyl ester prodrug (BMS-663068), which was developed to improve the solubility and dissolution of Temsavir. Temsavir is currently being investigated clinically through the use of the prodrug BMS-663068, and a Phase III study of BMS-663068 in HIV-1-infected treatment-experienced subjects is ongoing (NCT02362503).

Temsavir (BMS-626529) is an attachment inhibitor (AI) in clinical development (administered as prodrug BMS-663068) that binds to HIV-1 gp120. Temsavir displays in vitro activity against HIV-1 envelopes with C-C chemokine receptor type 5 (CCR5-), C-X-C chemokine receptor type 4 (CXCR4), and dual tropism. It also is active against almost all HIV-1 subtypes tested except for subtype CRF01-AE and possibly group O. Temsavir can inhibit both CD4-induced and CD4-independent formation of the "open state" four-stranded gp120 bridging sheet, and the subsequent formation and exposure of the chemokine co-receptor binding site. This unique mechanism of action prevents the initial interaction of HIV-1 with the host CD4+ T cell, and subsequent HIV-1 binding and entry. Temsavir is administered as a phosphonooxymethyl ester prodrug (BMS-663068), which was developed to improve the solubility and dissolution of Temsavir. Temsavir is currently being investigated clinically through the use of the prodrug BMS-663068, and a Phase III study of BMS-663068 in HIV-1-infected treatment-experienced subjects is ongoing (NCT02362503).