Gastrointestinal transit tolerance, cell surface hydrophobicity, and functional attributes of Lactobacillus Acidophilus strains isolated from Indigenous Dahi

Faculty Agriculture Year: 2021
Type of Publication: ZU Hosted Pages: 5092-5102
Authors:
Journal: Food Science & Nutrition Wiley Online Library Volume: 9
Keywords : Gastrointestinal transit tolerance, cell surface hydrophobicity,    
Abstract:
Strains of Lactobacillus acidophilus WFA1 (KU877440), WFA2 (KU877441), andWFA3 (KU877442) were isolated from indigenous Dahi (yogurt), screened, and selected based on acid and bile tolerance along with the antimicrobial activity. These selected strains were further assessed for their probiotic and functional attributes. Results for simulated gastric and intestinal tolerance/resistance revealed that all three strains can resist and survive under the following mentioned conditions. To access cell surface hydrophobicity, bacterial adhesion to hydrocarbons (BATH), cellular auto-aggregation, and salt aggregation were performed. In BATH, adhesion of strains against three hydrocarbons namely xylene, dichloromethane, and hexadecane was conducted. The results show that strains showed the least adhesion to xylene (54.25%) as compared to dichloromethane (55.25%) and hexadecane (56.65%).WFA1 showed maximum adherence percentage (55.48%) followed WFA2 (55.48%) and WFA3 (51.38%). Cellular auto-aggregation varied from 21.72% to 30.73% for WFA3 and WFA1, respectively. In the salt aggregation test (SAT), WFA1, WFA2, and WFA3 aggregated at 0.6, 1.0, and 2.0 molar concentrations of ammonium sulfate, respectively. PCR amplification of bile salt hydrolase gene (bsh) was performed and sequences were submitted to the public database of NCBI and Gene bank under accession numbers, KY689139, KY689140, and KY689141. Additionally, a cholesterol lowering assay was conducted and up to 26% reduction in cholesterol was observed by the strains. Regarding functional properties, exopolysaccharide (EPS) production, and antioxidant potential, strain WFA1 showed promising results EPS (1.027mg/ml), DPPH (80.66%), ABTS (81.97%), and reducing power (1.787). It can be concluded from the present study that the mentioned strains of L. acidophilus (WFA1, WFA2, and WFA3) are strongly hydrophobic; thus having an ability to survive and colonize under the gastrointestinal tract which confirms their probiotic nature. Regarding their functional properties, L. acidophilus WFA1 (KU877440) showed excellent properties of antioxidants and EPS production.
   
     
 
       

Author Related Publications

  • Salah Ahmed Abdelgelil Khaliefa, "Utilization of Sebestan Plum Fruit Nectar (Cordia dichotoma forst) in the Manufacture of Flavoured Nutraceutical Yoghurt Drink", Zagazig Journal of Food and Dairy Research, 2013 More
  • Salah Ahmed Abdelgelil Khaliefa, "Bacteriological, Physicochemical and Sensory Properties of Probiotic Fermented Camel's Milk as Affected by Added Inulin", Egypt. J. Appl. Sci, 2013 More
  • Salah Ahmed Abdelgelil Khaliefa, "The effect of various stabilizers on physiochemical properties of camel milk yoghurt", J. American Science, 2015 More
  • Salah Ahmed Abdelgelil Khaliefa, "Effect of freeze-drying on camel’s milk nutritional properties", International Food Research Journal, 2015 More
  • Salah Ahmed Abdelgelil Khaliefa, "Influence of Addition Modified Starches as Stabilizer on Physicochemical and Textural Properties of Camel's Milk Yoghurt", Zagazig Journal of Food and Dairy Research, 2015 More

Department Related Publications

  • Sabah Mohamed Monir, "Characterization of pure cheese snacks and expanded granule powders textured by the instant controlled pressure drop (DIC) process", فرنسا, 2011 More
  • Amal Ahmed Mohamed Mahmoud Adawy, "POSSIBILITY OF BENEFITS OF EMPTY MOTIFS FOR IMPROVING THE PERFORMANCE OF CURTAINS TEXTILE", الجمعية المصرية للاقتصاد المنزلى, 2013 More
  • Ali Abdelrahman Ali Abdelglel, ". Quality Of Brinza Like Cheese Manufactured From Different Types Of Milk", Zagazig J. Agric. Res., Vol. 42 No. (3) 2015,505-515, 2015 More
  • Ali Abdelrahman Ali Abdelglel, "Proteolysis And Biogenic Amines Formation In Sterilized Edam Cheese Curd Slurry Inoculated With Some Probiotic Strains Formulations", Journal of Food and Diary Sciences, 2014 More
  • Elsayed Mohamed Abdel Wahed Khalil, "Quality of white soft cheese made with different vegetable oils as milk fat substitute جودة الجبن الأبيض الطري المصنع باستخدام الزيوت النباتية المختلفة كبديل لدهن اللبن", Zagazig J. Agric. Res.,, 2013 More
Tweet