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Humanin

HN, S14G-Humanin

Quick Stats
Studies 491
Trials 100
Overview Studies Clinical Trials
Score 2
2003 pubmed

Humanin peptides block calcium influx of rat hippocampal neurons by altering fibrogenesis of Abeta(1-40).

Zou. Ping P; Ding. Yanan Y; Sha. Yinlin Y; Hu. Baihe B; Nie. Songqing S

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Key Findings

  • Humanin and its variant HNG quickly bind to Aβ1‑40 and increase light‑scattering, indicating interaction.
  • HNG changes Aβ1‑40 from fibrillary (fiber‑like) to amorphous structures.
  • HNG reduces the calcium rise in rat hippocampal neurons triggered by Aβ1‑40, a step that leads to cell death.

Practical Outcomes

  • At this stage, the findings are not ready for direct use by biohackers. They hint that humanin could become a neuroprotective supplement, but no human dosage, safety, or efficacy data exist yet. More animal and clinical studies are needed before any protocol can be recommended.

Summary

The study shows that humanin peptides, especially a version called HNG, can stick to a brain‑protein fragment linked to Alzheimer’s (Aβ1‑40), change its shape, and lower the calcium spikes that usually kill nerve cells in a dish. This suggests humanin might protect brain cells, but the work is only in test‑tube experiments with rat neurons.

Abstract

Humanin peptides (including HN, HNG and other mutants) were reported previously that antagonize neurotoxicity caused by various familial Alzheimer's disease (FAD) genes and Abeta derivatives. Herein, we describe the aggregation dynamics and the representative morphological characteristics of Abeta(1-40) after different time of addition humanin peptides, which revealed that (a) the interactions of both HN and HNG with Abeta(1-40) induced quick and significant increase of light-scattering intensity, and (b) HNG also caused obvious morphological alteration from fibrillary to amorphous. In the meantime, the experiments also revealed that the interaction of HNG with Abeta(1-40) could decrease Abeta(1-40)-induced calcium rise, an initial event accompanying Abeta(1-40)-induced apoptosis of cultured neurons. Our results indicate that HNG can protect neurons by altering Abeta(1-40) morphology.

Study Information

Provider

pubmed

Year

2003

DOI

10.1016/s0196-9781(03)00131-1