ARA-290 vs Ovagen

Non-hematopoietic EPO analogue; activates innate repair receptor (IRR/EPOR/CD131 complex) without erythropoietic effects; promotes tissue repair and nerve healing

ARA 290 (cibinetide) is a synthetic 11-amino-acid peptide derived from the helix B region of erythropoietin (EPO), engineered to activate the innate repair receptor (IRR) — a tissue-protective heteroreceptor complex comprising the EPO receptor and the β-common receptor (CD131) — without engaging the classical erythropoietic EpoR homodimer, thereby separating EPO's tissue-protective signaling from its hematopoietic effects. By selectively engaging the IRR rather than the erythropoietic receptor, cibinetide activates anti-inflammatory and anti-apoptotic intracellular pathways in neurons, endothelium, and other metabolically active tissues without causing erythrocytosis, hypertension, or thrombosis, making it a candidate for neuropathy and inflammatory tissue injury contexts. Randomized, double-blind Phase 2 clinical trials have demonstrated that cibinetide improves metabolic control and neuropathic symptom scores in patients with type 2 diabetes, and a separate study demonstrated improved corneal nerve fiber abundance in patients with sarcoidosis-associated small fiber neuropathy — providing human proof-of-concept for both diabetic and inflammatory peripheral neuropathy applications. Cibinetide (ARA 290) is an investigational compound that has not received FDA approval for any indication; Phase 2 data supports further investigation in peripheral neuropathies, but no Phase 3 completion or regulatory filing has occurred as of 2025.

Liver-targeted peptide complex modulating hepatocyte gene expression. Supports liver cell regeneration, enzyme function normalization, and hepatic protein synthesis.

Ovagen is a Khavinson-class peptide bioregulator derived from ovarian tissue, developed through Vladimir Khavinson's systematic organ-specific bioregulator research program at the St. Petersburg Institute of Bioregulation and Gerontology, and proposed to restore gene expression and physiological function in aging ovarian tissue by interacting with chromatin regulatory elements in target cells. As an ovarian tissue-derived bioregulator, Ovagen is positioned within the Khavinson framework as a compound designed to modulate transcription in Leydig and granulosa cells, potentially influencing estrogen synthesis, follicular function, and reproductive aging; the class-level mechanistic research has characterized how short Khavinson peptides bind DNA regulatory sequences to activate tissue-specific gene expression programs. Published research on the Khavinson peptide bioregulator class as a whole documents the systematic discovery and characterization of organ-specific peptides, with class-level evidence from animal models and human observational studies demonstrating restorative effects on tissue-specific physiological parameters across multiple organ systems. Ovagen has no FDA approval and no approved indication in any Western jurisdiction; no indexed PubMed studies specifically characterize ovagen's clinical outcomes in human subjects, and the compound is available only through the Russian bioregulator market under the class-level evidence framework established by the Khavinson group's published research.