In vitro cytotoxic and ACE-inhibitory activities of promod 278P hydrolysate of ovotransferrin from chicken egg white

Abstract

Peptides released from egg proteins via enzymatic hydrolysis show various bioactivities such as antimicrobial, antioxidant, antihypertensive, and immunomodulatory properties. The objective of this study was to investigate the cytotoxic and Angiotensin Converting Enzyme (ACE)-inhibitory activities of ovotransferrin and its promod 278P enzyme hydrolysate. Ovotransferrin from egg white was hydrolyzed using promod 278P at 45°C for 3 hours. Using the MTT assay, the cytotoxicity of ovotransferrin and promod 278P hydrolysate of ovotransferrin were evaluated in human cancer cell lines of various tissue origins. The ACE-inhibitory activity was determined using the cleavage of a chromogenic substrate -Hip-His-Leu. The promod 278P hydrolysate of ovotransferrin showed a potent cytotoxicity (>90%) at 20 mg/mL in all cancer cell lines tested, but ovotransferrin did not. The IC50 value of the promod 278P hydrolysate of ovotransferrin against 5 different cancer cells were 10.05 ± 1.55, 3.45 ± 0.94, 4.43 ± 1.87, 4.92 ± 0.63, and 10.43 ± 3.91 mg/mL for MCF-7, HeLa, HepG2, HT-29, and LoVo cells, respectively. The promod 278P hydrolysate of ovotransferrin showed a strong ACE-inhibiting activity: at 10 mg/mL level, the hydrolysate showed 76.82 ± 1.28% inhibition to ACE-inhibitory activity, and 73.33 ± 2.56%, 56.85 ± 1.84%, 50.32 ± 3.71%, 17.30 ± 0.13%, and 4.52 ± 6.83% inhibitory activity at 5, 2.5, 1.25, 0.625, and 0.3125 mg/mL level, respectively. The IC50 value of the promod 278P hydrolysate of ovotransferrin was 1.53 ± 0.20 mg/mL. However, ovotransferrin did not show any inhibitory effect to angiotensin-converting enzyme activity. This result indicated that the promod 278P hydrolysate of ovotransferrin has a great potential as an anticancer and antihypertension agent for humans, but the information on the peptides responsible for the functional activities is not available yet.

The Golden Egg: Nutritional Value, Bioactivities, and Emerging Benefits for Human Health

“…This enzyme triggers the processing and activation of angiotensin I into the active vasoconstrictor angiotensin II. Several yolk-derived peptides bearing antihypertensive activities have been described in the literature [113,124] along with ovotransferrin and egg white hydrolysates [125,126]. Some of these peptides contain only three amino-acids [27,127].…”

Functional properties of ovotransferrin from chicken egg white and its derived peptides: a review

“…Among the reported methods of hydrolyzing ovotransferrin, enzymatic hydrolysis was more widely used than other methods. Especially, commercially available plant, animal, and fungi or bacterial enzymes have been utilized with the enzyme-to-substrate ratio at 1:25 (Kim et al, 2012) and 1:50 (Moon et al, 2017). Single enzyme hydrolysis was the most commonly used method, but the use of two or more enzyme combinations also have been tested.…”

“…The peptides produced from ovotransferrin using dilute acid hydrolysis (Ibrahim et al, 2000;Kim et al, 2012;Moon et al, 2013) or enzymatic hydrolysis (Huang et al, 2010;Keung et al, 1982;Kim et al, 2012;Lee et al, 2006;Lei et al, 2011;Ma et al, 2020;Moon et al, 2017;Shen et al, 2010;Wang et al, 2017) also have been reported to have antioxidant, antimicrobial, antihypertensive and anticancer properties. Hence, egg white ovotransferrin and its derived peptides may have great potentials to be used as antimicrobial and antioxidative agents in the food industry and anticancer, antiviral, antihypertensive, and metal-supplementing agents in the medical and pharmaceutical industries.…”

The Potential of lactoferrin, Ovotransferrin and Lysozyme As Antiviral and immune-modulating Agents in COVID-19

“…An ovotransferrin peptide attenuates TNF-α-induced inflammation and superoxide generation in endothelial cells [ 112 ]. Hydrolyzates of ovotransferrin, as well as other egg white peptides, have also shown potent ACE inhibitory activity [ 79 , 80 ] and as is the case for bovine lactoferrin, an ovotransferrin peptide blocked angiotensin II effects via the angiotensin II receptor type 1 [ 81 ], thereby reducing inflammation potentiated by RAS activation. In an animal model study of peritonitis, ingestion of 40 mg/kg feed of an ovotransferrin peptide significantly attenuated the inflammatory responses: serum levels of TNF-α, IL-6 and myeloperoxidase activity were significantly reduced [ 82 ].…”