EXAMPLES
[0037] The การประดิษฐ์นี้ will be specifically described hereinbelow by
10 the Examples, without intending to limit the scope of the การประดิษฐ์นี้
to the following Examples.
[0038] Example 1 < Screening Using ความสามารถการเพิ่มจำนวน in Artificial
Intestinal Solution as Index >
Among the lactic acid bacteria owned by the present inventors, the
15 ความสามารถการเพิ่มจำนวน in an สารละลายลำไส้เทียม was evaluated for
about 480 strains which were mainly vegetable lactic acid bacteria (including JCM strains).
[0039] Concretely, first, each of the lactic acid bacteria was ถูกปลูกเชื้อ from
a glycerol stock to an MRS medium (Difco Laboratories) (10mL) in an
20 ปริมาณ of 1 v/v% each, and the bacterial cells were cultured at 35°C for
16 to 17 hours. Next, 0D660 of each culture medium (absorbance at
660 nrn) was measured with a spectrophotometer UV-1600 (Shimadzu Corporation), and a 100 µL solution prepared with the MRS medium so that 0D660 of each culture medium would be 10 was ถูกปลูกเชื้อ to an
25 สารละลายลำไส้เทียม (10mL) of the composition shown hereinbelow.
Thereafter, the bacterial cells were cultured at 37°C for 6 hours while
gently shaking, and OD660 was then measured to obtain a proliferation fold (0D660 after 6 hours/OD660 at inoculation). The representative screening results are shown in Table 3 and รูป 1.
< สารละลายลำไส้เทียม (pH 6.45) >
MRS Medium 9 mL
10 w/v% bile acid (Wako Pure Chemical 1 mL
Industries, Ltd.) solution
1 w/v% Pancreatin (from Porcine: SIGMA) 100 p,L
Here, the bile acid solution and the pancreatin solution, which were made sterile by treating the solution with a 0.22 gm filter (PVDF membrane, manufactured by Millipore), were used.
[Table 3]
Genera, สปีชีส์
Lactobacillus pentosus
Lactobacillus plantarum
Lactobacillus brevis
Lactobacillus
casei
Lactobacillus fertnenturn
Strain
TUA4337L
(การประดิษฐ์นี้)
JCM1558
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
JCM1149
16
17
18
19
JCM1059
20
21
22
23
24
JCM1134
25
26
27
28
29
30
JCM1173
31
32
33
34
Table 3
Proliferation Fold (times)
0D660 after 6 hours (0D660 after 6 hours/
01)660 at Inoculation
As a result, it can be seen that the proliferation folds are more likely
to be high in Lactobacillus pentosus and Lactobacillus plantarum, among which the Lactobacillus pentosus สายพันธุ์ TUA4337L has an especially high proliferation fold and excellent ความสามารถการเพิ่มจำนวน in the ทางเดินลำไส้.
5 [0042] Example 2 < Evaluation of in vivo ความสามารถการเพิ่มจำนวน in Intestinal
Tract >
Mice subjected to a high-fat diet ad libitum were ให้ with the สายพันธุ์ TUA4337L prepared as follows, and the number of bacteria excreted was quantified. Concretely, C57BL/6J mice (10-week old, male)
10 were ให้ in a single dose with about 1.0 x 109 lactic acid bacteria
cells (corresponding to 250 µL of bacterial cell suspension) at 10 o'clock in the morning (n=5), using the การให้ sample prepared as follows. < Preparation of การให้ Samples (Viable Bacteria-Containing Samples) >
15 [1] การปลูกเชื้อ สายพันธุ์ TUA4337L from a glycerol stock to an MRS
medium (30 mL) in an ปริมาณ of 1 v/v%;
[2] culturing bacterial cells (35°C, 20 hours);
[3] centrifuging the culture medium (8,000 rpm, 5 min) to remove the
ส่วนลอย, and suspending in 30 mL of PBS(-);
20 [4] centrifuging the suspension of [3] (8,000 rpm, 5 min) to remove the
ส่วนลอย, and re-suspending in 5 mL of PBS(-);
[5] counting the number of bacteria with a microscope; and
[6] dispensing a solution containing 20,000,000,000 cells to a 15 mL
centrifugation tube, centrifuging (8,000 rpm, 5 min) the solution to remove
25 ส่วนลอย, and thereafter suspending in 5 mL of a liquid feed (high-fat
19
diet 60 kcal %FAT: Research Diet) to prepare a bacterial cell suspension (liquid feed was prepared with PBS(-)).
[0043] Thereafter, all the stools of two-day portions were collected in 4
divided times (the afternoon of the day the test started, the morning and the
5 afternoon of the following day, and the morning of the day after the
following day), the number of bacteria for all the stools was quantified by the following method, and the rate of increase in สายพันธุ์ TUA4337L in the intestine in each of mice (the number of bacteria for all the stools/the
number of ให้ bacteria) was calculated. The results are shown in
10 Table 4.
< Method for Measuring the Number of Bacteria According to Real-Time PCR >
[1] adding 1 mL of PBS(-) to 100 mg of stools (wet weight basis), and then disrupting the stools with a spatula;
15 [2] collecting a 100 mg portion of the stools to an Eppendorf
tube (registered trademark), centrifuging (15,000 rpm, 5 min) the stools to
remove ส่วนลอย, and suspending the precipitation in 1 mL of PBS(-)
(the procedures of centrifuging to suspending being repeated twice);
[3] removing ส่วนลอย from the suspension of [2], and thereafter
20 extracting DNA from the suspension with a kit (QIAamp DNA Stool Mini
Kit: QIAGEN)
(the cell disruption being carried out by repeating the procedures three
times of adding 300 mg of glass beads (150 to 212 pm: SIGMA), 300 [IL of phenolichloroform/isoamyl alcohol (25:24:1), and 900 µL of buffer ASL
25 (reagents in the kit) to the stools, centrifuging the mixture with MULTI-
20
BEADS SHOCKER MB-200 (YASUI KIKAI) at 3,000 rpm for 1 minute, and allowing to stand on ice for 1 minute); and
[4] quantifying the lactic acid bacteria in the contents of the ทางเดินลำไส้ according to real-time PCR under the conditions shown hereinbelow:
5 ((Conditions for Real-Time PCR))
(1) Ten microliters of SYBR Premix Ex Taq II (Takara Bio), 0.8 RI, of
each primer (10 pin, 0.4 !IL of ROX reference Dye II, 61IL of sterile water, and 2 tt,L of a DNA solution are mixed, to prepare a liquid reaction mixture for PCR. As primers, the following primers specifically detecting 16S
10 rDNA of Lactobacillus pentosus and Lactobacillus plantarum are used (the
16S rDNA sequences of Lactobacillus pentosus and Lactobacillus
plantarum being 100% identical).
primer 1: 5'-GCAAGTCGAACGAACTCTGGTATT-3'
(SEQ ID NO: 2)
15 primer 2: 5'-CGGACCATGCGGTCCAA-3' (SEQ ID NO: 3)
(2) PCR is performed with 7500 Real Time PCR System (Applied
Biosystems), ซึ่งประกอบรวมด้วย, subsequent to a treatment at 95°C for 30 seconds, carrying out a total of 60 cycles of reactions, โดยที่ one cycle consists of 95°C for 5 seconds and 60°C for 34 seconds. The copy number per one
20 gram of the contents of ทางเดินลำไส้ is obtained from the fluorescent
intensity obtained, a total ปริมาณ of contents of the ทางเดินลำไส้, and the dilution folds.
(3) Separately, the copy number of 16S rDNA per one cell is obtained, and the copy number is converted to the number of bacteria. Here, it is
25 confirmed in the mice not ให้ with the lactic acid bacteria that
21
both Lactobacillus pentosus and Lactobacillus plantarum are not detected according to the above real-time PCR.
[0044] [Table 4]
Table 4
Number of Bacteria of Increased Rate
Individual
TUA4337L in Stools
No .
(cells)
1 3.6 x 109
2 1.9 x 109
3 2.6 x 109
4 1.6 x 109
5 1.4 x 109
Mean 2.2 x 109
(Number of Bacteria per Entire Stools/
Number of Bacteria ให้)
3.6
1.9
2.6
1.6
1.4
2.2
5 [0045] Example 3 < Effects of การขัดขวาง Weight Gains >
C57BL/6J mice (8-week-old, male) were grouped into four groups of an ordinary diet group, a high-fat diet group, a high fat diet + viable
bacteria group, and a high-fat diet + dead bacteria group (n = 10 each), and each of the groups was continuously given with the diets as shown in the
10 following Table 5 for 32 days, and the body weights were measured daily
and a mean was calculated. The transition in the mean is shown in รูป 2.
Here, intergroup comparisons were conducted using a t-test with a
significant level of 0.05.
[0046] Concretely, as to diet, each group of Table 5 was given with each
15 solid feed ad libitum. The high-fat diet + viable bacteria group was
ให้ with an การให้ sample prepared in the same manner as in Example 2. The high-fat diet + dead bacteria group was ให้
with an การให้ sample prepared as follows so that the lactic acid
bacteria would be contained in an ปริมาณ of about 1,000,000,000 cells per day. On the other hand, the ordinary diet group was ให้ with 250 pL of PBS(-) not containing the lactic acid bacteria, and the high-fat
5 diet group was ให้ with 250 pL of a liquid feed not containing
the lactic acid bacteria.
[0047]
[Table 5]
Table 5
Diet
Group
Ordinary Diet Group
High-Fat Diet Group
High-Fat Diet +
Viable Bacteria Group
High-Fat Diet +
Dead Bacteria Group
* 10 kcal %FAT (Research Diet)
60 kcal %FAT (Research Diet)
Lactic Acid Bacteria Solid Diet
ให้
10 kcal %FAT -
60 kcal %FAT -
TUA4337L
60 kcal %FAT
Viable Bacteria
TUA4337L
60 kcal %FAT
Dead Bacteria
10 [0048] < Preparation of การให้ Samples (Dead Bacteria-Containing
Samples) >
[1] การปลูกเชื้อ สายพันธุ์ TUA4337L in an ปริมาณ of 1 v/v % from a
glycerol stock to an MRS medium (30 mL);
[2] culturing the bacterial cells (35°C for 20 hours);
15 [3] centrifuging the culture medium (8,000 rpm, 5 min) to remove
ส่วนลอย, and thereafter suspending in 30 mL of PBS(-);
23
[4] centrifuging the suspension of [3] (8,000 rpm, 5 min) to remove ส่วนลอย, and thereafter re-suspending in 5 mL of PBS(-);
[5] counting the number of bacteria with a microscope;
[6] dispensing a solution containing 20,000,000,000 cells to a 15 mL
5 centrifugation tube, centrifuging the solution (8,000 rpm, 5 min) to remove
ส่