AMD-070 Hydrochloride: Potent and Selective CXCR4 Antagonist for Anti-HIV Research

Executive Summary: AMD-070 hydrochloride is a highly selective CXCR4 antagonist with a molecular weight of 458.86 g/mol and a chemical formula of C₂₁H₃₀Cl₃N₅ (APExBIO A3174). It inhibits CXCR4/CXCL12-mediated signaling, a key pathway for HIV entry into T-cells, supporting its use in anti-HIV drug development (Turner et al., 2022). The compound is highly soluble (≥45.9 mg/mL in water) and maintains 98% purity, facilitating its integration into cell-based and biochemical assays. AMD-070 hydrochloride is intended exclusively for research purposes, not for therapeutic or diagnostic use. Its robust physicochemical properties enable consistent experimental outcomes in CXCR4-related investigations.

Biological Rationale

CXCR4 is a chemokine receptor expressed on various immune and non-immune cells. It mediates cell migration, hematopoiesis, and organogenesis, and is a co-receptor for HIV-1 entry into CD4⁺ T cells (Turner et al., 2022). CXCR4 interacts with its endogenous ligand CXCL12 (also known as stromal cell-derived factor 1, SDF-1), triggering G protein-coupled signaling pathways involved in chemotaxis and viral entry. Inhibition of CXCR4 disrupts HIV-1 fusion and transmission, making CXCR4 antagonists like AMD-070 hydrochloride valuable tools in anti-HIV research and in the study of immune cell trafficking (Related Article).

Mechanism of Action of AMD-070 hydrochloride

AMD-070 hydrochloride binds selectively to the CXCR4 receptor, preventing its interaction with CXCL12. This blockade inhibits downstream signaling cascades, including the PI3K-Akt and ERK1/2 pathways, which are essential for HIV-1 entry and cell migration. By occupying the CXCR4 binding site, AMD-070 hydrochloride effectively prevents HIV-1 from utilizing this co-receptor, thereby inhibiting viral fusion and subsequent infection (Mechanism Comparison). The compound's high selectivity minimizes off-target effects on other chemokine receptors.

Evidence & Benchmarks

• AMD-070 hydrochloride demonstrates high solubility: ≥45.9 mg/mL in water, ≥33.33 mg/mL in DMSO, and ≥50 mg/mL in water at 25°C, pH 7.4 (APExBIO).
• It achieves 98% purity as determined by HPLC under standard laboratory conditions (APExBIO).
• Inhibition of CXCR4-mediated signaling reduces HIV-1 entry into CD4⁺ T cells in vitro, as shown by viral fusion assays (Turner et al., 2022, DOI).
• AMD-070 hydrochloride is stable at -20°C for at least six months when stored in solid form; working solutions should be prepared fresh (APExBIO).
• Off-target activity against other chemokine receptors, such as CCR5, is negligible at concentrations used for CXCR4 inhibition (see Comparative Review).

Applications, Limits & Misconceptions

AMD-070 hydrochloride is primarily used for:

• Anti-HIV research targeting CXCR4-dependent viral entry.
• Cell migration, chemotaxis, and immunology studies involving CXCR4 signaling.
• Preclinical models of cancer metastasis and immune cell trafficking where CXCR4/CXCL12 is implicated (Genomic Applications).

AMD-070 hydrochloride should not be used for diagnostic or therapeutic applications in humans or animals. Its action is limited to CXCR4; it does not inhibit other chemokine receptors at recommended concentrations.

Common Pitfalls or Misconceptions

• AMD-070 hydrochloride is not a CCR5 antagonist; it will not block HIV strains using CCR5 for entry.
• It is not intended for in vivo therapeutic use; safety and pharmacokinetics in humans are untested at research concentrations.
• Long-term storage of solutions at room temperature leads to degradation; only freshly prepared solutions are recommended.
• It does not inhibit non-CXCR4-dependent cell migration or unrelated signaling pathways.
• Purity and stability may be compromised if not stored at -20°C as advised.

Workflow Integration & Parameters

AMD-070 hydrochloride is supplied by APExBIO (SKU: A3174) as a brown oil suitable for cell-based and biochemical assays. It dissolves readily in water (≥45.9 mg/mL) and DMSO (≥33.33 mg/mL). For optimal performance:

• Prepare all working solutions fresh prior to use.
• Store the solid compound at -20°C, protected from light and moisture.
• Typical in vitro assay concentrations range from 0.1 to 10 μM; always titrate for the specific application.
• Confirm CXCR4 expression in target cells via flow cytometry or immunoblot for assay specificity.

For detailed troubleshooting and workflow optimization, see the in-depth guide here, which expands on assay design and vendor selection compared to the present article.

Conclusion & Outlook

AMD-070 hydrochloride is a validated, potent, and selective antagonist of CXCR4, essential for anti-HIV research and studies of CXCR4-mediated cellular processes. Its high purity, solubility, and stability make it a preferred research reagent for precise inhibition of the CXCR4 signaling pathway. By targeting the CXCR4/CXCL12 axis, AMD-070 hydrochloride enables robust analysis of HIV entry mechanisms and related immunological phenomena. For more in-depth mechanistic and translational insights, see the comparative review here, which highlights broader clinical implications of CXCR4 inhibition in oncology and immunology.

For ordering information, full specifications, and safety documentation, visit the AMD-070 hydrochloride product page from APExBIO.