A peer-reviewed study published by the British Journal of Pharmacology revealed disturbing information about the mRNA COVID-19 shots.

According to the research from Germany, the experimental mRNA injections form spike proteins in rat and human heart cells within 48 hours of inoculation.

Chief Nerd writes:

“New research out of Germany observing rat and human heart cells shows that within 48 hours of vaccination, the COVID-19 mRNA vaccines form spike proteins.

Spike proteins, made from the mRNA instructions inside the vaccines, were detected in the heart cells. While both Pfizer and Moderna vaccines caused cell abnormalities, the two induced different anomalies.

The paper is a rapid communication paper, meaning it is a shorter scientific paper published more quickly than a standard research article. Scientists tend to use this format when they have findings that need to be shared immediately with the academic community.”

Cont. from Chief Nerd:

“Within 48 hours, researchers detected spike proteins in both cell cultures and noticed abnormalities in heart contractions.

The researchers recorded heart contractions in a supplementary video, comparing normal contractions in an unvaccinated rat heart cell (1A) with vaccinated cells.

Pfizer-vaccinated cells displayed stronger, sustained contractions (1B) due to increased protein kinase A (PKA) activity.

The authors concluded that at the cellular level, the effects of the COVID-19 vaccines seemed to align closer with cardiomyopathy than with myocarditis. Cardiomyopathy is a condition where heart muscles become both structurally and functionally abnormal in the absence of other heart diseases. This differs from myocarditis and pericarditis, which occur when heart muscles become inflamed and damaged.”

The Epoch Times writes:

Pfizer-vaccinated cells displayed stronger, sustained contractions (1B) due to increased protein kinase A (PKA) activity. PKA levels are linked to heart performance; the higher the PKA level, the stronger the heart contractions.

Moderna-vaccinated cells developed irregular heart contractions and disrupted calcium regulation. The authors attributed the change in cell activity to disturbances in RyR2 receptors. These receptors play a key role in coordinating heart contractions using calcium.

Some of the heart muscles administered Moderna vaccines developed irregular and peristaltic contractions (1C and 1D), whereas others had irregular and arrhythmic contractions (1E and 1F).

Spike proteins were also detected within 48 hours in the cell culture of human cells.

“Cardiac side effects, which for the most part can be classified by their clinical symptoms as myo- and/or pericarditis, can be caused by both mRNA-1273 and BNT162b2,” the researchers wrote.


BNT162b2 is the Pfizer/BioNTech shot and mRNA-1273 is the Moderna shot.

From the British Journal of Pharmacology:

Experimental Approach

As persuasive theories for the underlying pathomechanisms have yet to be developed, this study investigated the effect of mRNA-1273 and BNT162b2 on the function, structure, and viability of isolated adult rat cardiomyocytes over a 72 h period.

Key Results

In the first 24 h after application, both mRNA-1273 and BNT162b2 caused neither functional disturbances nor morphological abnormalities. After 48 h, expression of the encoded spike protein was detected in ventricular cardiomyocytes for both mRNAs. At this point in time, mRNA-1273 induced arrhythmic as well as completely irregular contractions associated with irregular as well as localized calcium transients, which provide indications of significant dysfunction of the cardiac ryanodine receptor (RyR2). In contrast, BNT162b2 increased cardiomyocyte contraction via significantly increased protein kinase A (PKA) activity at the cellular level.

Conclusions and Implications

Here we demonstrated for the first time, that in isolated cardiomyocytes, both mRNA-1273 and BNT162b2 induce specific dysfunctions that correlate pathophysiologically to cardiomyopathy. Both RyR2 impairment and sustained PKA activation may significantly increase the risk of acute cardiac events.

“Recent translational data have found 1) mRNA targets heart muscle 2) within 48 hours cells become sick 3) nearly all vaccinated develop abnormal cardiac PET scans out to 6 months. Cardiac death cases after injection are due to the COVID-19 vaccine until proven otherwise,” said Dr. Peter McCullough.

Dr. McCullough joined Grant Stinchfield to explain the cardiac risks associated with the mRNA COVID-19 shots.


Read the full study titled “Cardiac side effects of RNA-based SARS-CoV-2 vaccines: Hidden cardiotoxic effects of mRNA-1273 and BNT162b2 on ventricular myocyte function and structure” at the British Journal of Pharmacology.

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