Structure

Two amino acids

Vilon is nothing more than lysine and glutamate joined by a single peptide bond. Its size is what makes it both interesting and uncertain.

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Lys-Glu

Lysine

Lys

C₆H₁₄N₂O₂

Glutamate

Glu

C₅H₉NO₄

Dipeptide

C₁₁H₂₁N₃O₅

275.30 g/mol

From amino acids to transport

Lys-Glu as a dipeptide

Lysine

Lysine is a basic amino acid with a long side chain. Its formula is C₆H₁₄N₂O₂ and it carries a positive charge at physiological pH.

Lysine

Lysine is a basic amino acid with a long side chain. Its formula is C₆H₁₄N₂O₂ and it carries a positive charge at physiological pH.

Peptide bond

Lysine and glutamate are joined by a peptide bond between the carboxyl group of lysine and the amino group of glutamate.

Peptide bond

Lysine and glutamate are joined by a peptide bond between the carboxyl group of lysine and the amino group of glutamate.

PEPT1 transport

As a dipeptide, Lys-Glu is a candidate substrate for the PEPT1 intestinal transporter.

[PEPT1-MEREDITH-2009]

PEPT1 transport

As a dipeptide, Lys-Glu is a candidate substrate for the PEPT1 intestinal transporter.

[PEPT1-MEREDITH-2009]

Chromatin and DNA

Could a dipeptide reach chromatin?

The Khavinson group has argued that short peptides can regulate gene expression, with KE proposed to interact with DNA motifs such as TCGA. A 2021 review summarized these claims and included a modeled interaction of the KE dipeptide with a DNA binding motif.

This is modeling and review-level evidence, not a demonstrated in vivo mechanism for FOXN1 or the thymus. If Vilon acts at the gene level, the target and dose-response remain unknown.

[PMC8619776]

KE dipeptide DNA binding model from Khavinson et al. 2021 — Molecular modeling figure proposing KE interaction with a DNA binding motif. This supports plausibility, not proof.
[PMC8619776]View source →

IL-2

Vilon has been reported to alter IL-2 gene expression in splenocytes. This links the peptide to T-cell signaling but does not prove thymic regeneration.

[KAZAKOVA-2002]

SIRT1

A 2023 report described KE regulation of SIRT1, PARP1, and PARP2 in aging mesenchymal stromal cells. This is a cell culture aging model, not a thymus assay.

[KE-SIRT-2023]

PARP

PARP enzymes are involved in DNA repair and chromatin remodeling. Changes in PARP activity could in theory influence gene accessibility, but the relevance to FOXN1 is speculative.

[KE-SIRT-2023]

Missing experiment

The FOXN1 question is still open

If Vilon really rebuilds the thymic microenvironment, FOXN1 is where we would look first. The direct experiment has not been done.

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Lys-Glu as a dipeptide

Lysine

Lysine is a basic amino acid with a long side chain. Its formula is C₆H₁₄N₂O₂ and it carries a positive charge at physiological pH.

Lysine

Lysine is a basic amino acid with a long side chain. Its formula is C₆H₁₄N₂O₂ and it carries a positive charge at physiological pH.

Peptide bond

Lysine and glutamate are joined by a peptide bond between the carboxyl group of lysine and the amino group of glutamate.

Peptide bond

Lysine and glutamate are joined by a peptide bond between the carboxyl group of lysine and the amino group of glutamate.

PEPT1 transport

As a dipeptide, Lys-Glu is a candidate substrate for the PEPT1 intestinal transporter.

[PEPT1-MEREDITH-2009]

PEPT1 transport

As a dipeptide, Lys-Glu is a candidate substrate for the PEPT1 intestinal transporter.

[PEPT1-MEREDITH-2009]

Could a dipeptide reach chromatin?

This is modeling and review-level evidence, not a demonstrated in vivo mechanism for FOXN1 or the thymus. If Vilon acts at the gene level, the target and dose-response remain unknown.