ARA-290 Research Overview

ARA-290 (Cibinetide) is a synthetic peptide derived from the tertiary structure of erythropoietin (EPO) designed to mimic specific signaling domains associated with tissue-protective receptor pathways. The peptide consists of 11 amino acids with sequence QEQLERALNSS, molecular weight approximately 1,257 Da, and molecular formula C₅₁H₈₄N₁₆O₂₁.

In laboratory and preclinical research environments, ARA-290 is utilized to investigate innate repair receptor (IRR) signaling, inflammatory pathway modulation, and cellular stress response mechanisms. Experimental studies examine how selective engagement of the erythropoietin receptor (EPOR)–β common receptor (CD131) heteromeric complex influences intracellular signaling pathways associated with tissue-protective responses.

Unlike erythropoietin itself, ARA-290 is studied for its ability to selectively activate non-erythropoietic receptor signaling pathways in cellular and animal models. Laboratory investigations have explored its activity across neuronal, endothelial, and immune cell systems, emphasizing receptor-mediated signaling mechanisms rather than therapeutic outcomes.

Note: All mechanistic insights derive from laboratory or animal models. This compound is research-use only and not intended for human or veterinary application.

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Mechanism of Action in Laboratory Models

ARA-290 has been investigated in several preclinical cellular signaling pathways.

Innate Repair Receptor (IRR) Activation

Laboratory models examine selective activation of the EPOR-CD131 receptor complex, known as the innate repair receptor. Receptor-binding and signaling assays evaluate downstream intracellular signaling responses (Brines et al., 2008).

Cytokine and Inflammatory Signaling

Experimental studies investigate modulation of pro-inflammatory cytokine signaling pathways, including cellular models examining inflammatory mediator expression and immune signaling regulation.

Neuroimmune Signaling

Preclinical models explore interactions with neuroimmune communication pathways, including neuronal and glial signaling responses associated with cellular stress conditions.

Cellular Stress Response Pathways

Laboratory assays examine signaling mechanisms related to cellular protection, mitochondrial function, and metabolic stress responses, particularly in models of tissue injury or inflammatory challenge.

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Primary Research Findings

Mechanistic studies in preclinical and in vitro models demonstrate several areas of investigation.

Innate Repair Signaling

Research involving receptor-binding assays and cellular models evaluates activation of the EPOR-CD131 receptor complex and associated intracellular signaling pathways (Brines et al., 2008).

Neuroimmune Communication

Laboratory models investigating neuronal and immune cell signaling examine how ARA-290 interacts with neuroimmune signaling networks and inflammatory response pathways.

Cellular Stress Pathways

Experimental systems studying metabolic or inflammatory stress examine receptor-mediated signaling associated with cellular resilience and repair-related pathways.

Note: Reported effects represent mechanistic observations in laboratory research; direct clinical translation is not established.

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Research Applications

Neuroimmune Signaling Research

Investigations include neuronal–immune communication pathways and cellular stress response signaling.

Inflammatory Pathway Studies

Laboratory models examine cytokine signaling, inflammatory mediator regulation, and immune signaling pathways.

Cellular Stress and Repair Signaling

Research explores signaling mechanisms associated with cellular adaptation and tissue response pathways following experimental stress conditions.

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Comparative Research Context

ARA-290 is frequently evaluated in comparison with erythropoietin-derived peptides and tissue-protective cytokine signaling molecules.

Comparative research focuses on receptor signaling specificity and intracellular pathway activation in vitro or in animal models rather than functional superiority.

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Research Handling and Format

Lyophilized Powder: Provided freeze-dried to support chemical stability and reproducibility.

Storage: Maintain in a cool, dry, light-protected environment.

Reconstitution: Stability post-reconstitution is short-term and laboratory-condition dependent.

Research Use Only: Intended solely for laboratory research purposes.

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Peptide Identity and Molecular Profile

Property	Description
Peptide Name	ARA-290
Peptide Class	Synthetic erythropoietin-derived peptide
Amino Acid Sequence	QEQLERALNSS
Amino Acid Length	11 residues
Molecular Weight	~1,257 Da
Molecular Formula	C₅₁H₈₄N₁₆O₂₁
Research Role	Preclinical studies on innate repair receptor signaling, inflammatory pathways, and cellular stress responses

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References

Brines, M., Patel, N. S. A., Villa, P., et al. (2008). Nonerythropoietic derivatives of erythropoietin reduce tissue injury and inflammation. Proceedings of the National Academy of Sciences, 105(31), 10925–10930.
https://doi.org/10.1073/pnas.0805594105

Brines, M., & Cerami, A. (2012). The receptor that tames the innate immune response. Molecular Medicine, 18, 486–496.
https://doi.org/10.2119/molmed.2012.00005

Brines, M., et al. (2004). Erythropoietin crosses the blood–brain barrier to protect against experimental brain injury. PNAS, 101(37), 13628–13633.
https://doi.org/10.1073/pnas.0405520101

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Note: Current understanding of ARA-290 derives primarily from mechanistic and preclinical studies. Clinical outcomes remain outside the scope of laboratory research descriptions.