Research overview
Bronchogen, Livagen, Pancragen, Chonluten and Cartalax: Khavinson Bioregulators
14 November 2026 · 5 min read
Khavinson bioregulators are a group of short peptides that the literature links to one specific tissue each. This guide covers five reagents from the family: Bronchogen, Livagen, Pancragen, Chonluten and Cartalax. Each is associated with a different tissue, which is why together they make a convenient panel for comparisons in in vitro models. The text describes only what the literature and the product pages report, not clinical conclusions.
Where the bioregulator concept comes from
The name comes from Vladimir Khavinson, whose work on short peptides is the starting point for the whole group. The working assumption is simple: a short peptide derived from a given tissue may influence the activity of cells from that same tissue. The concept is widely debated, and its mechanism has not been fully explained. It is best treated as a hypothesis to test in a controlled system rather than an established fact. For a wider history of the research and a critical look at the evidence, see our Khavinson bioregulators guide.
Five peptides, five tissues
| Peptide | Tissue named in the literature | Typical research model |
|---|---|---|
| Bronchogen | bronchial tissue | bronchial epithelium in culture |
| Livagen | liver tissue | liver cells in culture |
| Pancragen | pancreatic tissue | pancreatic cells in culture |
| Chonluten | bronchial and gastric mucosa | epithelial models |
| Cartalax | cartilage tissue | chondrocytes in vitro |
The grouping makes sense in comparative work. Bronchogen and Chonluten relate to airway epithelium, Livagen and Pancragen to abdominal organs, and Cartalax to cartilage. This allows one experiment in which several peptides are tested on the same cell type, with differences read against a shared control.
Short peptides: structure and quality control
Each of these compounds is a chain of amino acids joined by peptide bonds. A short sequence makes synthesis easier to repeat and makes it possible to verify identity carefully. In practice, purity and molecular mass can be checked by HPLC and mass spectrometry (MS). Every batch of Bronchogen, Livagen, Pancragen, Chonluten and Cartalax is tested to at least 99% purity by HPLC, with molecular mass confirmed by MS. This makes results from successive batches easier to compare, and it makes differences in cell response harder to attribute to contamination.
Bronchogen and Chonluten: airway epithelium
Bronchogen is associated with bronchial tissue. Work on it focuses on bronchial epithelial cells in cell models, and the product is available as a 20 mg lyophilisate. Chonluten is described as a regulator of bronchial and gastric mucosa, so it combines two epithelia of different origin in a single reagent. Both fit panels that compare epithelial responses from different organs. In such panels, keep culture conditions identical, because the composition of the medium can change a result more than a small difference between the peptides.
Livagen and Pancragen: abdominal organs
Livagen is described in the literature as a liver tissue bioregulator. Research centres on liver cells in in vitro models, and interpretation depends heavily on culture quality and negative controls. Pancragen is linked to the pancreas and has a similar research profile: it is used with pancreatic cells in culture, ideally alongside other bioregulators in one panel. Using these two peptides in one project shows whether a response is tissue specific or shared across several cell types.
Cartalax: cartilage tissue
Cartalax is a bioregulator associated with cartilage tissue. It is most often described in the context of chondrocytes in vitro and cartilage tissue models. The 20 mg lyophilisate suits series in which the concentration changes stepwise and the response is measured at several time points. This design helps separate a dose-dependent effect from random noise in the data.
Mechanisms discussed in the literature
The literature on Khavinson bioregulators describes studies in cell models, and some papers have suggested interactions with DNA fragments or with the regulation of gene expression. These observations are debated and need independent confirmation. Every project should therefore include a no-peptide control, a solvent-only control and a clearly defined endpoint. Do not assume that a result follows from one known mechanism, since this is where wrong conclusions most often start. It also helps to separate observation from interpretation in lab notes: record what was measured first, and only then what it might mean. This makes comparison with the published literature easier and prevents attributing results to peptides that were never confirmed.
How to plan a bioregulator panel
A good panel starts with one tissue and one model. Compare peptides on the same cell type, under the same culture conditions, with media from the same batch. A separate vehicle arm will show whether an effect comes from the peptide or from preparing the solution. A range of concentrations and several time points give more information than a single measurement. Finally, repeat experiments with independent batches, since differences between lots can change a conclusion more than the peptide itself.
A simple checklist before starting a series helps:
- defined cell model and cell origin,
- identical incubation time across all arms,
- separate controls: no peptide and solvent only,
- recorded method of solution preparation and its date.
Such a record lets you reproduce the experiment later and check which factor explains a difference in results.
Working in the laboratory
Store the lyophilisate at -20 °C in a tightly sealed vial, away from light and moisture. Before opening, let the vial reach room temperature so that water does not condense on the dry powder. The base solvent is water, preferably bacteriostatic water, and where a peptide dissolves poorly in water, a dilute acetic acid solution is used. Store the ready solution at 2-8 °C and avoid repeated freezing and thawing. Calculate the working concentration with the concentration calculator before starting a series.
All five reagents are lyophilised, tested to at least 99% purity (HPLC) and confirmed by mass (MS). We dispatch orders within 24 hours: parcels go to InPost parcel lockers in Poland, and DPD delivers across Europe. All products are intended for laboratory and scientific research use only (RUO).