Human ABO blood group-binding lactobacilli
Lactobacillus screening methods were carried out using surface plasmon resonance spectrums and human intestinal mucin and blood group antigens as probes. A trial to set selection criteria in the above-mentioned methods of screening for lactobacilli was made to adapt the methods to mass screening, and it was discovered that lactobacilli compatible with ABO blood groups can be screened by setting 100 RU as a criterion for judging bacterial binding under certain conditions. Using 238 lactobacillus strains, the above-mentioned screening methods and tests to judge their compatibility for the use of yogurt production were carried out, to at long last specifically discover bacillus strains compatible with blood groups A, B, and O.
1. An intestine-binding Laclobacillus gasseri , having the ability to bind to a human A blood group antigen represented by
[GalNAcαl-3(Fucαl-2)Gal-],
wherein said lactobacillus is selected by the following criteria:
(i) blood group A antigen-recognizing ability obtained by BIACORE1000 measurement using a blood group A antigen probe is 2,000 RU or higher;
(ii) blood group B antigen-recognizing ability' obtained by BIACORE1000 measurement using a blood group B antigen probe is 100 RU or lower;
(iii) blood group H antigen-recognizing ability obtained by BIACORE1000 measurement using a blood group H antigen probe is 100 RU or lower;
(iv) the ratio of the A antigen-recognizing ability to the B antigen-recognizing ability is 70 or higher;
(v) the ratio of the A antigen-recognizing ability to the H antigen-recognizing ability is 100 or higher;
(vi) A-human colonic mucin (A-HCM)-recognizing ability obtained by BIACORE1000 measurement using HCM is 100 RU or higher; and
(vii) O-HCM-recognizing ability obtained by BIACORE1000 measurement using HCM is 100 RU or lower,
wherein the intestine-binding Lactobacillus gasseri is selected from the group consisting of Lactobacillus gasseri Accession No.: NITE BP-26 and Lactobacillus gasseri Accession No.: NITE BP-27.
2. An intestine-binding Lactobacillus gasseri , having the ability to bind to a human B blood group antigen represented by
[Galαl-3(Fucαl-2)Gal-],
wherein said lactobacillus is selected by the following criteria:
(i) blood group B antigen-recognizing ability obtained by BIACORE1000 measurement using a blood group B antigen probe is 2000 RU or higher;
(ii) blood group A antigen-recognizing ability obtained by BIACORE1000 measurement using a blood group A antigen probe is 100 RU or lower;
(iii) blood group H antigen-recognizing ability obtained by BIACORE1000 measurement using a blood group H antigen probe is 100 RU or lower;
(iv) the ratio of the B antigen-recognizing ability to the A antigen-recognizing ability is 50 or higher;
(v) the ratio of the B antigen-recognizing ability to the H antigen-recognizing ability is 20 or higher; and
(vi) B-HCM-recognizing ability obtained by BIACORE1000 measurement using HCM is higher than A-HCM- and H-HCM-recognizing abilities,
wherein the intestine-binding Lactobacillus gasseri is selected from the group consisting of Lactobacillus gasseri Accession No.: NITE BP-145 and Lactobacillus gasseri Accession No.: NITE BP-146.
3. An intestine-binding Lactobacillus gasseri , having the ability to bind to a human 0 blood group antigen represented by
[Fucαl-2Gal-],
wherein said lactobacillus is selected by the following criteria:
(i) blood group H antigen-recognizing ability obtained by BIACORE1000 measurement using a blood group H antigen probe is 700 RU or higher;
(ii) blood group A antigen-recognizing ability obtained by BIACORE1000 measurement using a blood group A antigen probe is 100 RU or lower;
(iii) blood group B antigen-recognizing ability obtained by BIACORE1000 measurement using a blood group B antigen probe is 100 RU or lower;
(iv) the ratio of the H antigen-recognizing ability to the A antigen-recognizing ability is 800 or higher;
(v) the ratio of the H antigen-recognizing ability to the B antigen-recognizing ability is 20 or higher;
(vi) O-HCM-recognizing ability obtained by BIACORE1000 measurement using HCM is 100 RU or higher; and
(vii) A-HCM-recognizing ability obtained by BIACORE1000 measurement using HCM is 1000 RU or lower,
wherein the intestine-binding Lactobacillus gasseri is selected from the group consisting of, Lactobacillus gasseri Accession No.: NITE BP-25 and Lactobacillus gasseri Accession No.: NITE BP-28.