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Specimen Atlas of Research Peptides81 plates · MIT
Side-by-side · Research reference

PancragenvsPNC-27

Side-by-side comparison across mechanism, dosage, evidence, side effects, administration, and stack synergies. Citations on every claim where available.

AAnimal-StrongHUMAN-REVIEWED23/39 cited
BAnimal-StrongHUMAN-REVIEWED18/41 cited
Pancragen
Bioregulatory Tetrapeptide · Khavinson School
50 μgPrimate doseGoncharova 2014
10 daysTreatment cycleGoncharova 2015
3+ weeksEffect persistenceGoncharova 2014
IM · 10-day cycleGoncharova 2014
PNC-27
p53-HDM-2 Peptide · Membrane-Targeting
32 AAPeptide lengthSarafraz-Yazdi 2022
12-26p53 domain
Pre-clinicalDevelopment stage
In vitro / Pre-clinical only

01Mechanism of Action

Parameter
Pancragen
PNC-27
Primary target
Pancreatic acinar and islet cell differentiation pathwaysKhavinson 2013
Membrane-bound HDM-2 protein on cancer cell surfaceSarafraz-Yazdi 2022Krzesaj 2024
Pathway
Transcription factor activation → Pdx1/Pax6/Pax4/Ptf1a/Foxa2/NKx2.2 upregulation → Cell differentiationKhavinson 2013
PNC-27 binds to membrane HDM-2 1-109 domain → transmembrane pore formation → rapid necrosis (poptosis)Pincus 2024Krzesaj 2024
Downstream effect
Enhanced pancreatic beta-cell function, normalized insulin/C-peptide dynamics, improved glucose clearanceGoncharova 2014
Immediate cell lysis and extrusion of intracellular contents; secondary mitochondrial membrane disruptionPincus 2024Krzesaj 2024
Feedback intact?
Yes — preserves physiological glucose-insulin response
N/A — cytotoxic mechanism, not signaling modulation
Origin
Synthetic tetrapeptide derived from pancreatic tissue extracts (Khavinson bioregulator methodology)
Chimeric design: p53 transactivating domain (12-26) fused to penetratin CPP sequenceSarafraz-Yazdi 2022
Antibody development

02Dosage Protocols

Parameter
Pancragen
PNC-27
Primate dose (rhesus macaque)
50 μg / animal / dayGoncharova 2014
20–25-year-old females, 10-day IM protocol.
Effective concentration (in vitro)
0.05 ng/mLZakutskiĭ 2006
Organotypic tissue culture, both young and aged rat explants.
Route
IntramuscularGoncharova 2015
Frequency
Once daily for 10 daysGoncharova 2014
Treatment cycle
10-day course, effects persist 3+ weeks post-withdrawalGoncharova 2014
Evidence basis
Non-human primate RCT, in vitro cell cultureGoncharova 2015Khavinson 2013
Pre-clinical / In vitro
Diabetes model
STZ-induced diabetes (rat)
Evaluated via metabolic markers characterizing apoptosis.
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
Pancragen
PNC-27
Fat loss mechanism
None — cytotoxic anticancer agent

04Side Effects & Safety

Parameter
Pancragen
PNC-27
Reported adverse events
None documented in primate studies
Tolerability
Well-tolerated in aged rhesus monkeys (n=9)Goncharova 2015
Human safety data
No published human trials; clinical use limited to Russian gerontology protocols
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.
Cell death mechanism
Necrosis (not apoptosis) — rapid membrane lysisPincus 2024
Mitochondrial effects
Secondary mitochondrial membrane disruption in cancer cells
Absolute Contraindications
Pancragen
PNC-27
  • ·Human use — no clinical trials or safety data
Relative Contraindications
Pancragen
  • ·Active pancreatic malignancy (proliferation marker upregulation)
PNC-27

05Administration Protocol

Parameter
Pancragen
PNC-27
1. Reconstitution
Lyophilised tetrapeptide reconstituted in sterile saline or water per manufacturer protocol. Concentration not specified in literature.
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. Route
Intramuscular injection. Primate studies used daily IM dosing for 10 consecutive days.Goncharova 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. Timing
No specific timing constraints documented. Administered once daily in primate protocols.
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. Cycle structure
10-day treatment course. Restorative effects on pancreatic function persist for at least 3 weeks post-discontinuation.Goncharova 2014
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.