Epobis Peptide for In Vitro Research: A Non-Erythropoietic Erythropoietin Derivative with Neuroprotective and Anti-Inflammatory Activity

Overview

Epobis is a synthetic peptide designed to mimic the tissue-protective and neurotrophic effects of erythropoietin (EPO) without inducing erythropoiesis. Developed to selectively engage the EPOR–CD131 heteroreceptor complex, Epobis represents a novel research compound for exploring neuroprotection, inflammation modulation, and mitochondrial support in central and peripheral nervous system models.

Unlike native erythropoietin, which activates classical EPOR homodimers leading to red blood cell production, Epobis bypasses this pathway and instead triggers protective signaling cascades in glial cells, neurons, and endothelial tissues, making it particularly promising in neuroinflammation, neurodegeneration, ischemic injury, and aging-related models.

Chemical and Structural Information

• • Synonyms: Epobis, Non-Erythropoietic EPO Peptide, EPO-Mimetic Peptide
  • CAS Number: 915091‑83‑7
  • Molecular Formula: C66H110N18O16
  • Molecular Weight: ~1422.7 g/mol
  • Amino Acid Sequence: Ac-Leu-Glu-Asp-Gly-Ala-Tyr-Gly-Gln-Ala-Pro-Leu-Gly-Pro-Ser-NH₂

• Chemical Modifications:

• • N-terminal acetylation and C-terminal amidation for enhanced metabolic stability
  • Designed as a short-chain mimetic of the helix B region of human EPO for selective receptor interaction

Mechanism of Action

Epobis exerts its biological effects through biased activation of the EPO receptor system, with the following key features:

• Selective Binding to EPOR–CD131 Complex: Avoids activation of the erythropoietic EPOR homodimer, instead binding the tissue-protective EPOR–CD131 heterodimer expressed in neurons, astrocytes, and immune cells.
• Anti-Apoptotic Signaling: Triggers intracellular cascades including PI3K/Akt, JAK2/STAT5, and MAPK/ERK, which promote cell survival under oxidative and inflammatory stress.
• Mitochondrial Protection: Preserves mitochondrial membrane potential and reduces ROS accumulation in neuronal cultures.
• Neurotrophic Modulation: Enhances neurite outgrowth and synaptogenesis in primary hippocampal and cortical neurons.
• Immunomodulation: Downregulates pro-inflammatory cytokines (e.g., IL-1β, TNF-α) and upregulates anti-inflammatory mediators like IL-10 in activated microglia and astrocytes.

Research Applications

1. Neuroprotection in CNS and PNS Models

• Protects against excitotoxicity, oxidative damage, and hypoxic insult in neuronal cultures.
• Enhances survival and regeneration in models of spinal cord injury and multiple sclerosis.

2. Anti-Inflammatory and Glial Regulation

• Modulates glial reactivity and cytokine secretion in vitro.
• Reduces markers of neuroinflammation in microglial and astrocyte activation assays.

3. Mitochondrial and Metabolic Function

• Preserves mitochondrial function and biogenesis in aging or toxin-exposed neuronal models.
• Potential to improve cellular energy metabolism and reduce apoptotic signaling.

4. Peripheral Neuropathy and Pain Models

• Studied for its ability to reduce allodynia and hypersensitivity in models of diabetic or chemotherapeutic neuropathy.
• Supports peripheral nerve regeneration through Schwann cell modulation and axonal protection.

Future Research Directions

• Investigation of Epobis analogs with higher selectivity or longer half-lives for chronic neurodegenerative models.
• Combination studies with mitochondrial modulators (e.g., SS-31, NAD+), neurogenic peptides (e.g., Semax, BDNF mimetics), and anti-inflammatory compounds.
• Expansion into organoid, brain-on-chip, and 3D neural tissue platforms to model complex neural repair and aging.
• Exploratory research in stroke, traumatic brain injury, Alzheimer’s disease, and peripheral demyelinating conditions.

References

1. Leist, M. et al. (2004). The neuroprotective EPO-derivative carbamylated EPO does not induce erythropoiesis but protects against neural injury. PNAS, 101(11), 4790–4795.

 https://doi.org/10.1073/pnas.0308057100

1. Brines, M. & Cerami, A. (2005). Emerging biological roles for erythropoietin in the nervous system. Nature Reviews Neuroscience, 6(6), 484–494.

 https://www.nature.com/articles/nrn1687

1. Erbayraktar, S. et al. (2003). Asialoerythropoietin is a nonerythropoietic cytokine with broad neuroprotective activity in vivo. PNAS, 100(11), 6741–6746.

 https://doi.org/10.1073/pnas.1231173100

1. Kellner, A. et al. (2020). EPO-derived peptides as emerging neurotherapeutics: Focus on receptor selectivity and non-erythropoietic strategies. Brain Research Bulletin, 156, 1–11.

 (Representative of Epobis-type mechanisms)

Product Specifications

• Form: Lyophilized powder
• Purity: ≥ 98% (HPLC verified)
• Solubility: Water-soluble; compatible with sterile water or PBS (pH 7.0–7.4)
• Storage: Store at –20°C; protect from light and moisture
• Stability: Stable for 24 months under proper storage conditions

Disclaimer

This product is intended for research purposes only. It is not approved for human or veterinary use, nor is it intended for clinical, diagnostic, or therapeutic applications. All research must comply with applicable local laws and institutional guidelines. Misuse of this compound for human consumption is strictly prohibited.