Bronchogen is a synthetic four-amino-acid peptide (Ala-Glu-Asp-Leu) classified as a bronchial bioregulator. It belongs to a family of short peptides studied for their ability to influence gene expression and tissue maintenance, particularly in airway cells. It is a research-use-only compound and is not approved for therapeutic use in humans.[3][5]

How does Bronchogen work?

Bronchogen appears to enter the cell nucleus and interact directly with DNA, preferentially binding to CTG-containing sequences.[4] It also stabilises the DNA double helix, raising its thermal melting point by about 3 °C in lab tests.[1] Through these interactions, it is thought to modulate gene expression — essentially adjusting which genes are active — in a tissue-specific way.

What is Bronchogen used for in research?

Researchers are studying Bronchogen primarily in the context of bronchial and lung biology. Animal studies using a COPD model found it reduced airway inflammation, restored normal epithelial structure, and improved local immune markers.[5][6] Cell-culture work shows it supports differentiation of bronchial cells, with stronger effects in aged cell populations.[3]

How is Bronchogen dosed in research studies?

Published preclinical studies used a one-month treatment course in rat COPD models, showing structural and inflammatory improvements.[5][6] There is no established human dose. For a structured summary of amounts used in preclinical research, consult the dosage chart and calculator available on this page. Bronchogen is not approved for human use.

How do you reconstitute Bronchogen?

Bronchogen powder is typically dissolved by slowly adding bacteriostatic water or sterile saline to the vial, allowing liquid to run down the side rather than directly onto the powder. Swirl gently — never shake. Store the reconstituted solution refrigerated (2–8 °C) and use within a few weeks. Keep unreconstituted powder frozen and away from light.

Published animal studies did not report overt toxicity from Bronchogen administration, and the peptide's very short chain makes it unlikely to trigger immune responses.[5][6] However, safety in humans has not been formally evaluated in clinical trials. Bronchogen is a research compound only. Always consult a qualified professional before any experimental use.

Bronchogen Dosage Chart, Protocol & Calculator

A bronchial peptide bioregulator.

Objectif	Dose	Fréquence	Durée	Preuve	Source
Stimulation of bronchial tissue repair/reparative processes in aging (organotypic culture model)	0 mcg	per trial	per trial	Preclinical	PMID 17152728
Restoration of bronchial epithelium morphology and reduction of inflammation in COPD model	0.001 mg	1x/day	1 month	Preclinical	PMID 30199201 PMID 26468022

What is Bronchogen?

Bronchogen is a short, four-amino-acid peptide — its sequence is Alanine-Glutamic acid-Aspartic acid-Leucine, often written as Ala-Glu-Asp-Leu. It belongs to a family of research compounds called peptide bioregulators. These are tiny protein fragments that scientists believe act as natural molecular signals inside living tissue.

Bronchogen is specifically classed as a bronchial bioregulator, meaning it was developed to study the biology of airway and lung tissue. It is a research-use-only compound — not approved as a medicine and not intended for human self-administration.

How Bronchogen Works

Think of your DNA like a long instruction manual. Certain short peptides can slip into the cell's nucleus, find a specific page in that manual, and change how loudly a particular instruction is read. Bronchogen appears to work this way.

Lab studies show that Bronchogen can travel into a cell's nucleus and interact directly with DNA. Researchers found it binds preferentially to DNA sequences containing CTG repeats, suggesting it can recognise and target specific genetic addresses rather than sticking to DNA randomly.^[4] Separate calorimetry experiments showed that Bronchogen actually stabilises the DNA double helix — in the presence of Bronchogen, the temperature required to "melt" (unwind) DNA from calf thymus and mouse liver increased by about 3.1 °C, though the binding appears non-specific to any one base-pair type.^[1]

By interacting with DNA, Bronchogen is thought to fine-tune gene expression — turning up the volume on genes involved in cell differentiation and tissue maintenance. This is sometimes called an epigenetic mechanism, meaning it influences how genes are used without permanently rewriting the genetic code itself.

What the Research Shows

Here is a plain-English summary of the key published studies:

DNA stabilisation: When Bronchogen was added to DNA samples in a lab dish, the DNA became measurably more thermally stable. The peptide bound to both strands of the helix, mainly at the nitrogen bases, at a fairly tight and broad range of binding sites.^[1]
Cell differentiation in bronchial tissue: In aging human bronchial epithelial cell cultures, the markers of normal cell differentiation (especially CXCL12 and Hoxa3) were fading — a sign of cellular aging. Adding Bronchogen selectively restored the expression of those differentiation markers specifically in bronchial cells, not in other cell types tested. The effect was strongest in the oldest cultures, hinting at a potential geroprotective (age-related protective) role.^[3]
Obstructive lung disease model — structure: Researchers gave rats a form of COPD (chronic obstructive pulmonary disease) by exposing them to nitrogen dioxide for 60 days. A one-month course of Bronchogen reversed many of the structural changes: goblet cell overgrowth, squamous metaplasia (abnormal cell changes), and emphysema-like tissue damage all improved. Ciliated cells — the tiny hair-like structures that sweep mucus out of airways — were restored.^[5]
Obstructive lung disease model — inflammation: In the same type of COPD rat model, Bronchogen treatment reduced neutrophilic inflammation (the aggressive, damaging inflammatory response). Pro-inflammatory cytokine levels in the lungs normalised. Secretory IgA (a local immune marker) and surfactant protein B (which reduces surface tension inside air sacs) both rose, pointing to improved local immune and barrier function.^[6]
Gene regulation in plant models: In an interesting cross-kingdom study, Bronchogen was shown to influence the expression of growth and differentiation genes in tobacco plant cell cultures at very low concentrations (10⁻⁷ to 10⁻⁹ M). While plants are obviously different from humans, this finding supports the idea that Bronchogen's gene-regulating activity is a fundamental property of the peptide itself.^[2]

What Bronchogen Is Being Studied For

Based on the published literature, Bronchogen is being investigated in the following research contexts:

Maintenance and restoration of bronchial epithelial structure and function
Reduction of airway inflammation in obstructive lung disease models^[5]^[6]
Cellular differentiation support in aging bronchial tissue cultures^[3]
Mechanisms of short-peptide DNA interaction and epigenetic gene regulation^[1]^[4]

All of this work is preclinical — meaning it has been done in cells, tissue cultures, or animal models. There are currently no published large-scale human clinical trials for Bronchogen.

How Bronchogen Is Dosed in Research

Because Bronchogen is strictly a research compound, there is no established human dose. The animal and cell studies published so far used varying amounts depending on the experimental model — for example, rat COPD studies used a one-month administration course.^[5] For an at-a-glance reference of the amounts and schedules reported in preclinical research, see the dosage chart on this page. You can also use the calculator to explore research-context figures.

Mixing and Storing Bronchogen

Bronchogen is typically supplied as a lyophilised (freeze-dried) powder. To reconstitute it for research use, bacteriostatic water or sterile saline is added slowly to the vial — usually by letting the liquid run down the inner wall rather than squirting it directly onto the powder, which can degrade the peptide. Swirl gently; never shake. Once reconstituted, the solution should be stored in a refrigerator (2–8 °C) and used within a few weeks. For longer-term storage, keep the unreconstituted powder frozen and away from light. Always label vials with the date of reconstitution. These are general laboratory best practices; follow any specific guidance provided with your research-grade reagent.

Sources

Effect of the peptide bronchogen (Ala-Asp-Glu-Leu) on DNA thermostability. — Bulletin of experimental biology and medicine, 2011. PMID 21240358.
Short Exogenous Peptides Regulate Expression of CLE, KNOX1, and GRF Family Genes in Nicotiana tabacum. — Biochemistry. Biokhimiia, 2017. PMID 28371610.
Peptides tissue-specifically stimulate cell differentiation during their aging. — Bulletin of experimental biology and medicine, 2012. PMID 22808515.
Penetration of short fluorescence-labeled peptides into the nucleus in HeLa cells and in vitro specific interaction of the peptides with deoxyribooligonucleotides and DNA. — Biochemistry. Biokhimiia, 2011. PMID 22117547.
Modulating Effect of Peptide Therapy on the Morphofunctional State of Bronchial Epithelium in Rats with Obstructive Lung Pathology. — Bulletin of experimental biology and medicine, 2015. PMID 26468022.
[ANTIINFLAMMATORY AND REGENERATIVE EFFECT OF PEPTIDE THERAPY IN THE MODEL OF OBSTRUCTIVE LUNG PATHOLOGY]. — Rossiiskii fiziologicheskii zhurnal imeni I.M. Sechenova, 2017. PMID 30199201.

Bronchogen Guide & Tableau de Dose