Advanced Proteomics Techniques and Applications (30)Mass Spectrometry Techniques and Applications (17)Comparative and International Law Studies (13)Metabolomics and Mass Spectrometry Studies (11)Protein Hydrolysis and Bioactive Peptides (10)
Trlin HJF, Bennie RZ, Ogilvie OJ, Oh JK, Jin A, et al.
Journal of agricultural and food chemistry •
Cellular agriculture combines cell culture and tissue engineering techniques to produce animal-derived food products. While cell culture is routinely reported in the medical literature to affect protein expression in primary mammalian cells, the impact of these changes has yet to be established in the context of food production and allergenicity. To address this, primary bovine myoblasts were cultured for short-, medium-, and long-durations and then compared to native tissue. Proteomic and immunoblotting analyses identified cumulative changes at increasing passage numbers, with significant differences between cultured cells and native tissue. While allergens Bos d 6 and Bos d 13 were less abundant in cultured cells, an increase in immunoglobulin E interactions with Galα1-3Galβ1-4GlcNAc-R (α-Gal) in cultured cells indicates that α-Gal may be more abundant. Results demonstrate that the relative abundance of allergens in cultivated beef products will likely differ from that of traditional meat, highlighting a need for further investigation.
Ta HP, Clarisse C, Maes E, Yamakawa N, Guérardel Y, et al.
Chemistry and physics of lipids •
The growing consumption of fermented products has led to an increasing demand for lactic acid bacteria (LAB), especially for LAB tolerant to freezing/thawing conditions. Carnobacterium maltaromaticum is a psychrotrophic and freeze-thawing resistant lactic acid bacterium. The membrane is the primary site of damage during the cryo-preservation process and requires modulation to improve cryoresistance. However, knowledge about the membrane structure of this LAB genus is limited. We presented here the first study of the membrane lipid composition of C. maltaromaticum CNCM I-3298 including the polar heads and the fatty acid compositions of each lipid family (neutral lipids, glycolipids, phospholipids). The strain CNCM I-3298 is principally composed of glycolipids (32%) and phospholipids (55%). About 95% of glycolipids are dihexaosyldiglycerides while less than 5% are monohexaosyldiglycerides. The disaccharide chain of dihexaosyldiglycerides is composed of α-Gal(1-2)-α-Glc chain, evidenced for the first time in a LAB strain other than Lactobacillus strains. Phosphatidylglycerol is the main phospholipid (94%). All polar lipids are exceptionally rich in C18:1 (from 70% to 80%). Regarding the fatty acid composition, C. maltaromaticum CNCM I-3298 is an atypical bacterium within the genus Carnobacterium due to its high C18:1 proportion but resemble the other Carnobacterium strains as they mostly do not contain cyclic fatty acids.