Abstract
Differences in the levels of antinutritional components - Kunitz trypsin inhibitor and phytic acid - were determined for conventional and genetically modified soybean cultivated in Londrina and Ponta Grossa, South Brazil. Trypsin inhibitor levels in the conventional cultivars of Londrina and Ponta Grossa varied from 14.56 mg g-1 (BRS 267) to 20.40 mg g-1 (BRS 261) and from 13.51 mg g-1 (BRS 232) to 19.65 mg g-1 (BRS 268), respectively, whereas in the genetically modified (GM) cultivars, they were found to be 14.16 mg g-1 (BRS 242 RR) to 18.21 mg g-1 (BRS 255 RR) for Londrina, and 13.68 mg g-1 (BRS 244 RR) to 18.73 mg g-1 (BRS 256 RR) for Ponta Grossa. Average levels of phytic acid in the Londrina’s conventional and GM samples were estimated as 2.05 and 1.78 mg g-1, respectively, and in the Ponta Grossa conventional and GM samples, the respective average values were lower, 1.60 and 1.51 mg g-1.
Highlights
Trypsin is an enzyme produced by the pancreas that enables the digestion of proteins present in animal and human feeding (LEBENTHAL; LEE, 1980; MANDARINO, 2010)
This feature is essential for genetic improvement of soybean cultivars, concerning their quality, since they are used as a food source for humans and animals
The protease inhibitors are considered to be one of the antinutritional factors observed in soybeans and other legumes, several in vitro studies have exhibited their inhibitory action on the expression of some genes in breast, skin, bladder, colorectal, lung, pancreatic, mouth and esophageal cancer, in addition to their antioxidant properties (CÁRDENAS et al, 2010; BRANDON et al, 1993)
Summary
Trypsin is an enzyme produced by the pancreas that enables the digestion of proteins present in animal and human feeding (LEBENTHAL; LEE, 1980; MANDARINO, 2010). Protease inhibitors, constituting one of the soybean protein fractions, represent approximately 6.0% of all existing proteins (BRANDON et al, 1993; MANDARINO, 2010). The presence of these inhibitors in soy-based foods and dietetic products may cause pancreatic nodular hyperplasia in monogastric animals, as shown by studies with guinea pigs (BARROS et al, 2008). About 80% of trypsin activity is due to the KTI (BRANDON et al, 1989; MANDARINO, 2010) This feature is essential for genetic improvement of soybean cultivars, concerning their quality, since they are used as a food source for humans and animals. The protease inhibitors are considered to be one of the antinutritional factors observed in soybeans and other legumes, several in vitro studies have exhibited their inhibitory action on the expression of some genes in breast, skin, bladder, colorectal, lung, pancreatic, mouth and esophageal cancer, in addition to their antioxidant properties (CÁRDENAS et al, 2010; BRANDON et al, 1993)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
