¹²⁵I-SDF-CXCR4 ( IC50 = 13 nM ); HIV-1 (NL4.3 strain) ( IC50 = 1 nM ); HIV-1 (NL4.3 strain) ( IC50 = 9 nM ); HIV-1 (NL4.3 strain) ( IC50 = 3 nM ); HIV-1 (NL4.3 strain) ( IC50 = 26 nM )

Mavorixafor (AMD-070) (2 mg/kg, p.o.) decreases the expression of human Alu DNA in mice and dramatically reduces the number of metastatic lung nodules in mice without causing a decrease in body weight[2].

The compounds are first preincubated in SUP-T1 T cells for 30 minutes on ice, with 1 serving as a control. Following this, the cells are washed with PBS containing 2% FCS and then incubated with PE-conjugated anti-CXCR4 mAb for an additional 30 minutes on ice. The cell samples are first fixed with 1% paraformaldehyde in PBS and then examined using an FACS Calibur flow cytometer after being cleaned in PBS. The average fluorescence intensity values are used to calculate the compounds' dose-dependent inhibitory effects on mAb binding.

On a 96-well plate, 5 × 10³ cells/well are seeded with DMEM containing 10% FCS. The cells are treated with or without 2 µM AMD3100 or 6.6 µM AMD-070 after a 24-hour period. An assay employing MTT is used to quantify the number of cells after 24 or 48 hours[2].

[1]. Discovery of novel small molecule orally bioavailable C-X-C chemokine receptor 4 antagonists that are potent inhibitors of T-tropic (X4) HIV-1 replication. J Med Chem. 2010 Apr 22;53(8):3376-88.

[2]. Impact of a CXCL12/CXCR4 Antagonist in Bleomycin (BLM) Induced Pulmonary Fibrosis and Carbon Tetrachloride (CCl4) Induced Hepatic Fibrosis in Mice. PLoS One. 2016 Mar 21;11(3):e0151765.

[3]. Effect of a novel orally bioavailable CXCR4 inhibitor, AMD070, on the metastasis of oral cancer cells. Oncol Rep. 2018 Jul;40(1):303-308.

AMD 070 is an aminoquinoline.
Mavorixafor is a small molecule drug candidate that belongs to a new investigational class of anti-HIV drugs known as entry (fusion) inhibitors. Currently there is only one FDA-approved entry inhibitor, enfuvirtide (Fuzeon), that is available for the treatment of HIV infection. Several experimental entry inhibitors are now in early stage testing, including mavorixafor. Mavorixafor is a selective allosteric antagonist of the CXCR4 receptor on HIV, preventing the virus from entering and infecting healthy cells.
Mavorixafor is an orally bioavailable inhibitor of C-X-C chemokine receptor type 4 (CXCR4), with potential antineoplastic and immune checkpoint inhibitory activities. Upon administration, mavorixafor selectively binds to CXCR4 and prevents the binding of CXCR4 to its ligand, stromal cell-derived factor 1 (SDF-1 or CXCL12). This inhibits receptor activation and results in decreased proliferation and migration of CXCR4-overexpressing tumor cells. In addition, inhibition of CXCR4 prevents the recruitment of regulatory T-cells and myeloid-derived suppressor cells (MDSCs) to the tumor microenvironment, thereby abrogating CXCR4-mediated immunosuppression and enabling the activation of a cytotoxic T-lymphocyte-mediated immune response against cancer cells. The G protein-coupled receptor CXCR4, which is upregulated in several tumor cell types, induces the recruitment of immunosuppressive cells in the tumor microenvironment, suppresses immune surveillance, and promotes tumor angiogenesis and tumor cell proliferation. It is also a co-receptor for HIV entry into T-cells.

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Drug Indication
Investigated for use/treatment in HIV infection.

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Mechanism of Action
Chemokine receptors expressed on the surface of immune cells are known to play a critical role in virus infection and transmission. CXCR4, and another chemokine receptor CCR5, are involved in HIV infection. The process of HIV entry begins with binding of the viral envelope glycoprotein to both the CD4 receptor and one of only two chemokine receptors, and ends with fusion of viral and cell membranes. Viral entry provides novel therapeutic targets against HIV. To date, at least 3 sub classes of HIV viral entry/fusion inhibitors have emerged: 1. CD4 binding or attachment - targets initial recognition and binding of the viral glycoprotein gp120 to the cell-surface CD4 antigen. 2. Chemokine co-receptor binding - targets binding of virus to the CCR5 or CXCR4 co-receptor. 3. Fusion Inhibition - targets the viral glycoprotein gp41 inhibiting the fusion of virus with the cell. Different strains of HIV prefer one receptor or the other, or may use either receptor to infect cells. * 35% of strains use both CXCR4 and CCR5 * 5% of strains are pure CXCR4 using * 60% of strains are pure CCR5 using * An infected individual may harbor different levels of both CXCR4 and CCR5 using virus * CXCR4 using virus independently predicts CD4 decline and HIV clinical progression and is associated with earlier mortality

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Pharmacodynamics
AMD-070 is a small molecule drug candidate that belongs to a new investigational class of anti-HIV drugs known as entry (fusion) inhibitors. Approximately 76% of HIV-patients with measurable viral load are infected with a strain of virus that is resistant to one or more classes of antiretroviral agents, thus reducing treatment options. Unlike many existing HIV drugs that target the virus after it has infected a healthy cell, AMD-070 blocks the virus from entering a healthy cell, thus preventing the replication process. AMD-070 targets the CXCR4 receptor on HIV and prevents the virus from entering and infecting healthy cells. * AMD-070 is specific for the CXCR4 receptor and does not interact with any other chemokine receptors in vitro * AMD-070 strongly inhibits viral infection by all CXCR4 using virus (including virus using CXCR4 alone and/or virus using CXCR4 and CCR5) in vitro * AMD-070 is orally bioavailable in animals * Suitable PK and toxicity profile for oral dosing * AMD-070 shows additive or synergistic effects in vitro in combination with other known anti-HIV agents * AMD-070 is active against CXCR4 using HIV strains that are resistant to existing antiretroviral therapies in vitro * Potent anti-HIV activity against CXCR4-using laboratory strains and clinical isolates

C₂₁H₂₇N₅

349.47

349.226

C, 72.17; H, 7.79; N, 20.04

558447-26-0

Mavorixafor trihydrochloride; 2309699-17-8

11256587

White to gray solid powder

1.2±0.1 g/cm3

597.0±50.0 °C at 760 mmHg

108-110ºC

314.9±30.1 °C

0.0±1.7 mmHg at 25°C

1.656

2.78

2

4

7

26

431

1

NCCCCN(CC1=NC2=C(N1)C=CC=C2)[C@@H]3C4=C(CCC3)C=CC=N4

WVLHHLRVNDMIAR-IBGZPJMESA-N

InChI=1S/C21H27N5/c22-12-3-4-14-26(15-20-24-17-9-1-2-10-18(17)25-20)19-11-5-7-16-8-6-13-23-21(16)19/h1-2,6,8-10,13,19H,3-5,7,11-12,14-15,22H2,(H,24,25)/t19-/m0/s1

N'-(1H-benzimidazol-2-ylmethyl)-N'-[(8S)-5,6,7,8-tetrahydroquinolin-8-yl]butane-1,4-diamine

2934.99.9001

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Note: Please store this product in a sealed and protected environment (e.g. under nitrogen), avoid exposure to moisture.

Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

5%DMSO + 40%PEG300 + 5%Tween 80 + 50%ddH2O: 3.5mg/ml (10.02mM) (Please use freshly prepared in vivo formulations for optimal results.)