Cardiogen

Cardiogen is a synthetic tetrapeptide, a short chain of four amino acids, with the sequence H-Ala-Glu-Asp-Arg-OH (AEDR) and a molecular weight of about 489.5 g/mol. It comes from Russian research on peptide bioregulators, which are molecules that help regulate cell function, and is being studied for its potential to regenerate heart tissue. It belongs to a group of tissue-specific bioregulators designed to target heart muscle cells, called cardiomyocytes [1][2].

What is the peptide Cardiogen and what is the bioregulator being researched for?

Cardiogen is a short peptide bioregulator molecule with a molecular weight of about 489.5 g/mol. Since the 1980s, Russian researchers have studied it for its role in regulating gene expression and cell function. The main focus is on heart tissue: the peptide is meant to specifically stimulate the regeneration and maintenance of heart muscle cells, known as cardiomyocytes [2].

The scientific research status on Cardiogen is purely preclinical. This means all data comes only from cell cultures and animal models. To date, there are no human studies, no clinical trial phases, and no regulatory drug approval [1][2][3][4]. Even so, Cardiogen is offered on the gray market, outside regular distribution channels, as a research peptide in vials.

How is Cardiogen used in studies and in practice?

In scientific investigations, Cardiogen has been tested exclusively in cell cultures and animal models and has never been given to human subjects. In a cell culture study by Chalisova et al., the peptide was applied to rat heart tissue at a concentration of 10^-12 M [2]. Animal experiments, on the other hand, used intraperitoneal administration, which means injection into the abdominal cavity [1].

On the gray market, Cardiogen is typically offered as a lyophilized powder, a freeze-dried form, in 20 mg vials. Users inject it subcutaneously, meaning under the skin. Anecdotal reports often mention dosages of 200-500 µg daily over a period of 4-6 weeks. This is purely experimental user practice without scientific evidence for humans and does not constitute a dosage recommendation. For step-by-step instructions on handling and storing peptides, see the guides.

How do reconstitution and concentration calculation work for Cardiogen?

Reconstitution of Cardiogen means dissolving the freeze-dried powder (lyophilisate) from 20 mg vials with a sterile solvent such as bactericidal or bacteriostatic water (BAC water). The exact procedure for proper dissolution is explained in the guides on mixing.

Here is a calculation example for the active ingredient concentration (purely mathematical, not a dosage recommendation): If you dissolve a 20 mg vial with 2 ml of BAC water, you get a concentration of 10 mg/ml. Based on typical gray market figures of 200 µg, this corresponds to a volume of 0.02 ml (20 µl or 2 tick marks on a 1 ml insulin syringe). For 500 µg, it would be 0.05 ml (50 µl or 5 tick marks). Important: This model calculation serves exclusively for mathematical understanding and does not represent a usage recommendation, as clinical data in humans are lacking.

Since Cardiogen is purely preclinical research (evidence level 1), there is no validated dose calculator for this substance. For basic information on handling peptide vials, you can check the peptide library as well as the glossary, which defines terms such as reconstitution, lyophilisate, and bioavailability.

What effect does Cardiogen show at the molecular level in heart tissue?

According to current preclinical knowledge, the biological effect of Cardiogen in heart tissue is based on three key cellular mechanisms from cell and animal experiments:

• Proliferation of heart muscle cells: In organotypic tissue cultures, Cardiogen stimulated cell division (proliferation) in rat heart tissue from young and old animals. This is remarkable because adult cardiomyocytes have a limited ability to regenerate [2].
• Inhibition of apoptosis via p53: Cardiogen reduced the expression of the apoptosis marker and tumor suppressor p53. This could potentially decrease the programmed cell death of cardiomyocytes in the myocardium [2].
• Modulation of cardiac fibroblasts: Cardiogen regulates connective tissue-forming fibroblasts in a way that inhibits excess scar tissue and promotes the preservation of functional heart muscle structures [1].

In the animal model after induced myocardial infarction, studies also showed a threefold reduced mortality, smaller necrosis areas, and preservation of myocardial glycogen stores. These results come from experiments on mice and cannot be directly transferred to humans [1].

What anti-tumor effects have been published for Cardiogen?

In preclinical animal experiments on older rats with experimental M-1 sarcoma, Cardiogen showed tumor-modifying properties [1]. This finding is based on a single animal model and has not yet been confirmed by human studies.

What knowledge gaps and risks exist with Cardiogen?

The evidence base for Cardiogen has significant scientific gaps regarding fundamental pharmacological and toxicological data:

• Lack of human studies: There are no clinical studies on tolerability, efficacy, or dosage in humans.
• Insufficient replication: The published work comes almost exclusively from Russian institutes and has not been independently validated by Western research groups.
• Lack of long-term data: Neither in animal experiments nor in humans are there reliable long-term studies on chronic side effects or risks.
• Incomplete mechanism of action: The exact cellular uptake and the involved intracellular signaling pathways are not fully understood.
• Unknown pharmacokinetics: Parameters such as plasma half-life, bioavailability, and metabolic pathways are not scientifically documented.

For comparisons with better-researched regenerative peptides, the overview of BPC-157 and GHK-Cu is recommended, as well as the peptide library for detailed active ingredient analyses. When purchasing research peptides online, the guide on protection when ordering provides important criteria for quality and purity assessment.