Biochemistry
Ali Ahmadi Shapourabadi; Mohammad Fazilati; Habib-Allah Nazem
Abstract
Lactoferrin is one of the milk proteins that has shown a wide range of physiological activities such as antibacterial, anti-protozoal, anti-fungal, anti-viral, anti-cancer, antioxidant, anti-inflammatory and immunomodulatory. In this study, lactoferrin was extracted and purified from cow, sheep and goat ...
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Lactoferrin is one of the milk proteins that has shown a wide range of physiological activities such as antibacterial, anti-protozoal, anti-fungal, anti-viral, anti-cancer, antioxidant, anti-inflammatory and immunomodulatory. In this study, lactoferrin was extracted and purified from cow, sheep and goat milk. HPLC analysis and determination of the concentration of these three extracted lactoferrins were performed. Antibacterial activity against Gram negative Escherichia coli and Salmonella typhi and gram positive Bacillus cereus and Staphylococcus aureus and antioxidant activity were investigated. The activity of lactoferrin against DPPH free radical was investigated. Also, lactoferrin activity was evaluated in neutral acidic and alkaline environments. The combination test with iron was also performed with FeNTA reagent. The findings showed that lactoferrin has the ability to inhibit two bacteria, Escherichia coli and Staphylococcus aureus. Also, the evaluation of lactoferrin activity in neutral acidic and alkaline environments showed that lactoferrin is more stable in alkaline environment than other environments. In the combination test with iron, the results indicated the combination of lactoferrin with iron. The percentage of free radical inhibition was equal to %4.49. Also, the results showed that the concentration of lactoferrin in goat's milk is higher than that of sheep's and cow's milk and its amount was equal to 131.66 μg/ml.
Gholamreza Mahdieh najafabady; Mohammad Fazilati; Aliasghar Pilehvarian; Habib olah Nazem
Abstract
Abstract High blood pressure doubles the risk of cardiovascular disease. In addition to chemical drugs, biodegradable peptides have antihypertensive properties and the Ile-Gln-Pro peptide is one of these peptides. Spirulina is a green-blue algae of the cyanobacteria branch, which is now used as a supplement ...
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Abstract High blood pressure doubles the risk of cardiovascular disease. In addition to chemical drugs, biodegradable peptides have antihypertensive properties and the Ile-Gln-Pro peptide is one of these peptides. Spirulina is a green-blue algae of the cyanobacteria branch, which is now used as a supplement to the pharmaceutical industry. The Ile-Gln-Pro peptide was extracted from Spirulina platensis algae using an alkalase enzyme and was analyzed by filtration gel chromatography and RP-HPLC and its inhibitory effect on the ACE enzyme was investigated. ACE enzyme was inhibited by Ile-Gln-Pro peptide by non-competitive inhibition method with Ki = 5.8 μM and IC50 = 0.65 μM . According to the available information from the ACE inhibitor peptide in the BIOPEP database, a comparative study was performed on the location of amino acids in the ACE inhibitor peptide and its effect on the potency of tri-peptide inhibition. Based on SPSS software, on the 196 ACE inhibitor peptide, the presence of Lys, Gly, Thr and Pro amino acids at the end of C and His, Ala, and Met amino acids at the end of N, as well as Phe, Ala, His And His in the middle of peptide have relationship with EC50 and peptide-inhibiting potency.
