A declassified CIA document from February 1951 has reignited public outrage after resurfacing online, highlighting Soviet research into biochemical similarities between parasitic worms and cancerous tumors.
The report, declassified in 2014, summarizes a 1950 Soviet scientific paper published in the journal Priroda by Professor V.V. Alpatov. It details how both parasites and tumors thrive under similar metabolic conditions, including anaerobic energy production and large glycogen reserves.
Key Biochemical Similarities
Soviet researchers noted that intestinal parasites and tumor cells rely on altered metabolic pathways, such as ‘aerofermentor’ processes coined by German scientist Th. Brand. This allows survival in low-oxygen environments, like dense tumor tissues with limited blood supply.
Both accumulate glycogen as an energy store, distinguishing them from healthy cells. Experiments revealed tumors and parasites respond uniquely to chemicals, suggesting shared biochemical traits like unique antigens, purine metabolism disruptions, and altered enzymes.
Promising Experimental Compounds
The study tested drugs effective against both parasites and tumors. Myracyl D, synthesized in 1938 by German chemist H. Mauss, combated bilharzia parasites and showed activity against malignant growths.
Guanozolo, a guanine-like molecule, inhibited nucleic acid production essential for cancer cell division, suppressing synthesis in microorganisms and mouse tumors. Atebrin enantiomers also produced unexpected reactions: tumor tissues, certain mollusks, and frog parasites favored the right-rotating form, indicating inverted molecular receptors.
Public Reaction and Misconceptions
Social media users have voiced frustration over the document’s long classification. One post stated: ‘The Americans knew. They read it, classified it CONFIDENTIAL, and locked it in a vault for 60 years.’ Another claimed: ‘The CIA knew from 1951 that cancer was parasites.’
However, the document does not claim cancer results from parasites. It only outlines observed biochemical overlaps and compound effects from Soviet experiments.
Cold War Context
U.S. intelligence translated and archived the paper amid early Cold War concerns over Soviet biomedical advances, potentially relevant to defense and public health. Modern oncology explores similar tumor traits like metabolic shifts and immune evasion, though tumors differ fundamentally from parasites.
This report provides insight into mid-20th-century cancer research behind the Iron Curtain, as scientists sought novel treatment pathways.
