Pepsin-digested casein peptides from goat milk induced 80.92% apoptotic cell death in human colorectal cancer cells, suggesting potential as natural anti-cancer agents.
80.92% apoptotic cell deathPepsin-treated goat milk casein fraction against HCT-116 colorectal cancer cells
What the researchers found
Pepsin-treated goat milk casein fraction caused 80.92% apoptotic cell death in HCT-116 human colorectal cancer cells, the highest among all enzyme-protein combinations tested.
Why it matters
Colorectal cancer is the third most common cancer worldwide. Identifying food-derived peptides with anti-cancer properties could lead to novel preventive strategies or complementary treatments with fewer side effects than conventional chemotherapy.
The numbers in context
80.92% apoptotic cell death; pepsin-treated casein most effective; 3 enzymes tested
How the study worked
Goat milk casein and whey proteins digested with trypsin, pepsin, and papain. Peptides characterized by LC-QTOF-MS. Cytotoxicity assessed by MTT assay and cell death type analyzed by flow cytometry (Annexin V/PI) on HCT-116 cells.
Who was studied
HCT-116 human colorectal cancer cell line
What this study cannot tell us
In vitro study using a single cancer cell line. No testing on normal cells for selectivity. No animal or human studies. Crude peptide fraction tested — specific active peptides not isolated. Concentrations used may not be achievable through dietary intake.
How to read the evidence
In vitro study with a single cell line. Very preliminary evidence requiring extensive follow-up including selectivity testing, animal studies, and mechanism elucidation.
When this study was published
Published in 2021, part of growing research on food-derived bioactive peptides with anticancer potential.
The bigger picture
Food-derived bioactive peptides are gaining attention as potential functional ingredients with health benefits beyond basic nutrition. The finding that common milk proteins can yield peptides with strong anti-cancer activity supports the growing field of food-as-medicine research.
Questions still open
- Which specific peptides in the casein hydrolysate are responsible for the anti-cancer effect?
- Are these peptides selective for cancer cells, or do they also harm normal cells?
- Could dietary goat milk consumption have any cancer-preventive effects?
Common questions
Can drinking goat milk prevent cancer?
How do these milk peptides kill cancer cells?
Read the original research
Potential anticarcinogenic effect of goat milk-derived bioactive peptides on HCT-116 human colorectal carcinoma cell line.
Analytical biochemistry, 622, 114166
Citation
Cakir, Bilal; Tunali-Akbay, Tugba. (2021). Potential anticarcinogenic effect of goat milk-derived bioactive peptides on HCT-116 human colorectal carcinoma cell line.. Analytical biochemistry, 622, 114166. https://doi.org/10.1016/j.ab.2021.114166