Side-by-side · Research reference
BronchogenvsPNC-27
Side-by-side comparison across mechanism, dosage, evidence, side effects, administration, and stack synergies. Citations on every claim where available.
AAnimal-StrongHUMAN-REVIEWED16/35 cited
BAnimal-StrongHUMAN-REVIEWED18/41 cited
Bronchogen
Tetrapeptide Bioregulator · Khavinson-School
Research models: tissue culture / parenteral
PNC-27
p53-HDM-2 Peptide · Membrane-Targeting
In vitro / Pre-clinical only
01Mechanism of Action
Parameter
Bronchogen
PNC-27
Primary target
Bronchial epithelial cellsKuzubova 2015
Membrane-bound HDM-2 protein on cancer cell surfaceSarafraz-Yazdi 2022Krzesaj 2024
Pathway
Tissue-specific bioregulation → epithelial cell differentiation → ciliated cell restoration
PNC-27 binds to membrane HDM-2 1-109 domain → transmembrane pore formation → rapid necrosis (poptosis)Pincus 2024Krzesaj 2024
Downstream effect
Reversal of goblet cell hyperplasia, squamous metaplasia elimination, restoration of ciliated epithelium, normalized secretory IgA and surfactant protein B productionKuzubova 2015Titova 2017
Immediate cell lysis and extrusion of intracellular contents; secondary mitochondrial membrane disruptionPincus 2024Krzesaj 2024
Feedback intact?
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N/A — cytotoxic mechanism, not signaling modulation
Origin
Synthetic tetrapeptide (Ala-Glu-Asp-Leu) from Khavinson bioregulator framework
Chimeric design: p53 transactivating domain (12-26) fused to penetratin CPP sequenceSarafraz-Yazdi 2022
Antibody development
—
—
02Dosage Protocols
Parameter
Bronchogen
PNC-27
Effective concentration (culture)
0.05 ng/mLZakutskiĭ 2006
Demonstrated in organotypic tissue culture of bronchial explants.
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Treatment duration (animal)
1 month (30 days)Kuzubova 2015Titova 2017
Course duration in rat COPD models.
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Evidence basis
Animal models (rat) / organotypic cultureTitova 2017Kuzubova 2015Zakutskiĭ 2006
No human clinical trials reported in available literature.
Pre-clinical / In vitro
Tissue specificity
Selective for bronchopulmonary tissue
Part of Khavinson organ-specific bioregulator series.
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Clinical status
—
Pre-clinical only — no human trials
In vitro and animal model data only.
In vitro concentrations
—
10–100 μM range
Effective concentrations in cell culture studies.
Shorter analogue
—
PNC-28 (28 AA variant)
Retains HDM-2 binding and cytotoxic activity.
03Metabolic / Fat Loss Evidence
Parameter
Bronchogen
PNC-27
Fat loss mechanism
—
None — cytotoxic anticancer agent
04Side Effects & Safety
Parameter
Bronchogen
PNC-27
Animal safety profile
No adverse effects reported in published rat studies
Limited safety data; only animal models available.
—
Human data
Absent — no clinical trials in humans reported
—
Long-term effects
Unknown — maximum study duration 30 days in animals
—
Human safety data
—
None available — no human trials conducted
Normal cell selectivity
—
In vitro: no cytotoxicity to normal cells (MCF-10-2A, peripheral blood mononuclear cells)Sarafraz-Yazdi 2010Thadi 2020
Normal cells express minimal membrane HDM-2.
Cancer cell specificity
—
Depends on membrane HDM-2 expression levels
Ovarian cancer lines with low membrane HDM-2 showed <30% necrosis.
Mitochondrial effects
—
Secondary mitochondrial membrane disruption in cancer cells
Absolute Contraindications
Bronchogen
—PNC-27
- ·Human use — no clinical trials or safety data
Relative Contraindications
Bronchogen
—PNC-27
—05Administration Protocol
Parameter
Bronchogen
PNC-27
1. Research context only
Bronchogen has been studied exclusively in animal models and organotypic tissue culture. No approved formulation or human administration protocol exists.
PNC-27 has not been tested in human subjects. All data derive from in vitro cancer cell line studies and limited animal models. No approved clinical formulation, dosing protocol, or safety profile exists.Pincus 2024
2. Animal model protocol
In rat COPD models, tetrapeptide administered for 30-day course following 60-day NO₂ exposure. Route and exact dosing not specified in abstracts.Titova 2017Kuzubova 2015
In vitro studies used 10–100 μM PNC-27 dissolved in cell culture medium. Peptide was added directly to cancer cell cultures (pancreatic, breast, colon, ovarian, leukemia lines) and incubated for 24–72 hours.
3. Organotypic culture
Bronchial tissue explants from young (3-week) and aged (18-month) rats cultured in medium containing 0.05 ng/mL bronchogen, demonstrating tissue-specific stimulation.Zakutskiĭ 2006
Dual-labeled PNC-27 (green on N-terminus, red on C-terminus) demonstrated intact peptide binding to cancer cell membranes with combined yellow fluorescence at 30 minutes, persisting during cell lysis.Sookraj 2010
4. Khavinson bioregulator tradition
Part of Russian peptide bioregulator framework emphasizing tissue-specific low-dose effects. Typically administered parenterally in related peptides from this series.
Cytotoxicity correlates directly with membrane HDM-2 expression levels. Blocking HDM-2's p53-binding domain (1-109) with monoclonal antibodies prevents PNC-27-induced necrosis.