What Is ARA-290 Peptide?
ARA-290 peptide, also known as cibinetide, is an 11-amino-acid sequence derived from the tertiary structure of erythropoietin (EPO). It was engineered to isolate the tissue-protective, non-hematopoietic properties associated with EPO while removing the sequence responsible for erythropoiesis. As a result, ARA-290 has become an important tool compound for researchers investigating cytoprotection, tissue repair, and neuroimmune signaling in preclinical models.
Studies explore ARA-290 because it selectively engages a signaling complex distinct from the classical EPO receptor. Preclinical research suggests that this pathway is activated primarily under conditions of tissue stress or injury, positioning ARA-290 as a probe for understanding endogenous repair mechanisms. In research settings, investigators use ARA-290 to examine inflammatory resolution, neuronal signaling, and metabolic responses in cell-culture and animal models. Amino Labs supplies ARA-290 as a lyophilized, high-purity reference material intended strictly for laboratory research and not for human or animal consumption.
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The Innate Repair Receptor and ARA-290 Mechanisms
The defining feature of ARA-290 in research is its engagement of the innate repair receptor (IRR), a heteromeric complex proposed to consist of the EPO receptor subunit paired with the beta-common receptor (CD131). Unlike the homodimeric EPO receptor that drives red-cell production, this complex is understood in research models to be upregulated at sites of metabolic stress and inflammation, allowing ARA-290 to act in a tissue-selective manner.
In preclinical investigation, activation of this receptor complex is associated with several downstream themes:
- Anti-inflammatory signaling: Studies explore how ARA-290 modulates macrophage phenotype and pro-inflammatory cytokine expression in vitro.
- Cytoprotection: Research models examine reductions in apoptotic markers and enhanced cellular survival under stress conditions.
- Neuroimmune modulation: Preclinical research suggests ARA-290 may influence small-fiber and neuropathic signaling pathways in experimental systems.
Because ARA-290 sits within the broader landscape of repair- and recovery-oriented research peptides, laboratories frequently study it alongside compounds such as BPC-157 and TB-500 when characterizing tissue-repair and anti-inflammatory signaling in comparative assays. Its receptor selectivity makes it a particularly useful reference tool for distinguishing hematopoietic from cytoprotective EPO signaling.
Handling, Storage, and Sourcing
Amino Labs provides ARA-290 as a lyophilized powder verified at 99%+ purity by HPLC and confirmed by mass spectrometry. Proper handling is essential to maintain the peptide’s structural integrity across experiments.
- Storage: Store the sealed, lyophilized vial at -20 degrees C, away from light and moisture, where it remains stable long-term.
- Reconstitution: Researchers typically add sterile bacteriostatic or ultrapure water slowly along the vial wall, swirling gently rather than shaking to preserve the peptide.
- Aliquoting: Reconstituted material is best divided into single-use aliquots and kept frozen to avoid degradation from repeated freeze-thaw cycles.
As a Canadian-owned supplier, Amino Labs ships third-party-tested, high-purity research peptides across Canada, with quality documentation supplied per lot to support reproducible work. Investigators studying overlapping innate-immune pathways may also review KPV for comparative research.