WO2004090122A1 - 舌上皮由来細胞株kt-1及びその用途 - Google Patents
舌上皮由来細胞株kt-1及びその用途 Download PDFInfo
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- WO2004090122A1 WO2004090122A1 PCT/JP2004/004788 JP2004004788W WO2004090122A1 WO 2004090122 A1 WO2004090122 A1 WO 2004090122A1 JP 2004004788 W JP2004004788 W JP 2004004788W WO 2004090122 A1 WO2004090122 A1 WO 2004090122A1
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
- C12N5/0602—Vertebrate cells
- C12N5/0618—Cells of the nervous system
- C12N5/062—Sensory transducers, e.g. photoreceptors; Sensory neurons, e.g. for hearing, taste, smell, pH, touch, temperature, pain
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2503/00—Use of cells in diagnostics
- C12N2503/02—Drug screening
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2500/00—Screening for compounds of potential therapeutic value
- G01N2500/10—Screening for compounds of potential therapeutic value involving cells
Definitions
- Tongue epithelium-derived cell line KT-1 Tongue epithelium-derived cell line KT-1 and its use
- the present invention relates to a taste sensor, a method for searching for a taste sensor using the same, and more particularly, to a cell line KT-1 established from mouse tongue epithelial cells and its use.
- the present invention relates to a method for searching for a substance that controls odor, a new taste substance, a taste modifying substance, and a taste reduction auxiliary substance.
- a first object of the present invention is to provide a cell expressing a taste receptor and a transformant thereof.
- a second object of the present invention is to provide a taste sensor using the cells.
- a third object of the present invention is to provide an application of the taste sensor.
- a fourth object of the present invention is to establish a system that uses cells at various stages of differentiation to search for differentiation-inducing factors for specific taste cells and substances that control the expression of taste receptors. .
- the present invention provides the following cells, taste sensor, and uses thereof.
- a cell line that expresses integrin receptor yuichi which was isolated from mouse tongue epithelium using strong expression of integli and ⁇ 1 as an indicator and established by long-term subculture.
- a cell line ⁇ -1 established by long-term subculturing the cell line KT-1 according to 1 above in the following low serum medium.
- Insulin final concentration 5 ng / ml
- KT-1 cells obtained by culturing the cell line KT-1 according to 2 or 3 above in the following differentiation-inducing medium.
- Epidermal growth factor final concentration 1 ng / ml
- Keratinocyte growth factor final concentration 1 ng / ml
- Phenylalanine final concentration 4.95 zg / ml
- KT-1 cell according to 4, wherein the KT-1 cell functionally expresses a taste receptor.
- the cell line KT-1 according to any one of the above 1 to 3 or the KT-1 according to the above 4 or 5.
- Taste sensor including cells.
- the taste receptor is a sweet receptor, a bitter receptor, a salty channel, or an amino acid receptor.
- a cell line KT-1 that has not been expressed in the cell line KT-1, and has been transformed by transfection of a taste receptor Yuichi cDNA whose ligand is unknown.
- the cell line KT-1 of the present invention is a cell established by isolating and culturing mouse tongue epithelial cells for at least two and a half years after culture.
- the cell line KT-1 is a unique cell line that contains a mixture of undifferentiated cells and cells that express the taste receptor, and is referred to as FERM ⁇ -8347 (deposited on March 27, 2003).
- FERM ⁇ -8347 deposited on March 27, 2003.
- FERM ⁇ -8347 deposited on March 27, 2003.
- FIG. 1 is a drawing showing the results of extracting total RNA from cell line KT-1A and performing RT-PCR using a specific primer.
- FIG. 2 is a drawing showing the results of detecting taste receptor mRNA in cell line KT-1A.
- Lane 1 Tlrl
- Lane 2 Tli'2
- Lane 3 Tlr3
- Lane 4 Cytokeratin 8.
- FIG. 3 is a drawing showing the results of detection of taste receptor uichi mHNA in KT-1C cells.
- Lane 1 Tlrl Lane 2: Tlr2, Lane 3: Tlr3, Lane 4: Cytokeratin 8.
- FIG. 4 is a drawing showing an immunohistochemical staining image showing the expression pattern of integrin in adult mouse circumvallate nipples.
- FIG. 5 is a drawing showing the results of analysis of expression levels of each integrin molecule in the cell line KT- by flow cytometry.
- Figure 6 shows immunostaining and in situ hybridization of molecules expressed in the cell line KT-1B (upper) and in the mouse circumvallate papillary (lower) and specifically expressed in taste buds. It is a drawing showing a result.
- FIG. 7 is a drawing showing the results of sweet taste response in KT-1C cells by power calcium imaging.
- FIG. 8 is a drawing showing the expression of the salty channel ctENaC of the cell line KT-IB by hormones. (Lane 1: progesterone, lane 2: hydrocortisone, lane 3: aldosterone)
- FIG. 1 is a drawing showing a result.
- Insulin final concentration 5 ng / ml
- the resulting cell line was designated as KT-1B strain.
- the cell line KT-1B has been deposited as FERM BP-8347.
- the cell line KT-1B was cultured in the following medium for 3 to 7 days to further differentiate the cell line KT-1B to obtain KT-1C cells.
- Differentiation induction medium MGDB basic medium C
- Epidermal growth factor final concentration 1 ng / ml
- Inulin-like growth factor final concentration ⁇ ng / ml
- Phenylalanine final concentration 4.95 jug / ml
- the cDNA of the cell line KT-1A was obtained by preparing a total RNA from the cell line KT-1A and performing a reverse transcription reaction using the total RNA as a type II. It is convenient to use a Trizol solution (manufactured by Invitrogen) or the like for RNA extraction. A reverse transcription reaction using 2 ⁇ g of this total UNA can be easily performed by using a Super Script First Strand cDNA synthesis kit (Invitrogen).
- RNA was extracted from the cell lines KT-1A and KT-1C cells using a Trizol solution. Using 2 g of the obtained RNA, cDNA was synthesized on a 40-1 scale using a Super Script First Strand cDNA synthesis kit.
- Figures 2 and 3 show cell lines KT-1A (Fig. 2) and KT-1C cells (Fig. 3) shows the results of detection of taste receptor Yuichi mRNA in FIG.
- Lane 1 Tlrl
- Lane 2 Tlr2
- Lane 3 Tlr3
- Lane 4 Cytokeratin 8.
- the sweet receptor Yuichi Tlr2 and Tlr3, which are not expressed in the cell line KT-1A are expressed in the KT-1C cells. That is, KT-1C cells contain many cells expressing Tlr2 and Tlr3.
- the cell lines KT-1A and KT-1C cells can be distinguished in the expression of Tlr2 and Tlr3.
- Table 2 shows the expression results of the marker molecule and other marker molecules.
- FIG. 4 is an immunohistologically stained image showing the integrin expression pattern of the adult mouse circumvallate papillae. As shown in FIG. 4, in the circumvallate nipple of the mouse, integrin 34 and integrin 6 were highly expressed confined to the basal epithelium. On the other hand, integrin ⁇ 1 was strongly expressed not only in the basal part but also in taste buds.
- FIG. 5 shows the expression levels of each integrin molecule in the cell line KT-1B.
- FIG. 6 shows the expression of undivided cell-specific molecules and taste bud-specific molecules in the cell line KT-1B (upper) and mouse circumvallate papillary (lower).
- FIGS. 6A and 6B show the expression of musas hi protein
- FIGS. 6E and 6F show the expression of cytokeratin 8-protein.
- the scale bar is 40 m.
- cells stained white indicate cells expressing each molecule.
- cytokeratin 8 which is a taste bud-specific molecule was also expressed in the cell line KT-1B. Expression of cytokeratin 8 was observed in about 20 to 30% of cells of the cell line KT-1B.
- RNA probes labeled with digoxigenin were dissolved in a hybridization solution (50% formamide, 5 XSSC, 10% DenhartS 10 mg / ml salmon testis DNA) so that each probe had a concentration of 0.5 ⁇ g / ml.
- FIG. 6 shows the expression of undivided cell-specific molecules and taste bud-specific molecules in the cell line KT-1B (upper) and mouse circumvallate papillary (lower).
- Figures 6C and 6D show undivided 6G and 6H show the expression of the taste bud-specific gene STG, and
- FIGS. 61 and 6J show the expression of bitter taste receptors T2r5, T2rl8, and T2r.
- FIG. 19 shows the expression of 19.
- cells stained white indicate cells expressing each molecule.
- the portion stained black indicates the expressing cells.
- FIG. 6 ' shows that the cell population containing the cell line KT-1B contains undifferentiated cells, cells expressing taste bud-specific molecules, and cells responding to bitter taste.
- the cell line KT-1B was cultured in a 35 mm glass bottom dish (Matsunami glass), and when it reached 50-70% confluence, the differentiation induction treatment described in Example 1-3 was performed for 3-7 days. KT-1C cells were obtained.
- PBS (-) and KT-1C cells were washed twice with imaging buffer one (NaHC0 3 2 2 mM, KC1 5 mM, NaH 2 P0 4 1.25 mM, glucose 10 mM, NaCl 124 m M) in 1 ml 5 ⁇ 1 Fura-2- ⁇ (1 mM dissolved in DMSO ⁇ Molecular Probe) and 5 Probe1 cremophor (acalai tesque) were added and incubated at room temperature for 30 minutes for Fura-2. - ⁇ was taken into cells.
- imaging buffer one NaHC0 3 2 2 mM, KC1 5 mM, NaH 2 P0 4 1.25 mM, glucose 10 mM, NaCl 124 m M
- 5 Probe1 cremophor acalai tesque
- the cells were washed twice with an imaging buffer to remove Fura-2- ⁇ which was not taken up by the cells.Then, fill the dish with 1 ml of a solution containing lmM MgCl 2 and 2 mM CaCl 2 in the imaging buffer. Then, an artificial sweetener Acesulfame K (manufactured by Fluka), which is known to be a ligand for sweet receptor Yuichi Tlr2 / Tlr3, was added to a final concentration of 5 mM.
- Acesulfame K manufactured by Fluka
- Cells having a sweet responsiveness that is, cells functionally expressing Tlr2 and Tlr3, which are sweet receptors, respond to Acesulfame K (a sweet substance) to cause calcium to enter the cytoplasm, As a result, cytoplasmic calcium It is known that the concentration increases. Therefore, the fluorescence (490 nm) emitted by Fura-2 caused by calcium flowing into the cytoplasm due to the addition of Acesulfame K is controlled by AquaCosmos software (Hamamatsu Photonics, Inc.) using a CCD camera (Hamamatsu Photonics, Inc.). Were measured over time using an inverted fluorescence microscope (DMRIB, Leica, Inc.) equipped with a laser microscope. After the measurement, temporal change analysis was performed using AquaCosmos software to convert the time-dependent change in the fluorescence intensity of each cell into a change in calcium concentration, and a graph was formed.
- AquaCosmos software Hamamatsu Photonics, Inc.
- DMRIB inverted flu
- FIG. 7 shows the results.
- FIG. 7A shows the fluorescence intensity before adding Acesulfame K
- FIG. 7B shows the fluorescence intensity 0.5 minutes after adding Acesulfame K.
- the color bar on the right side of FIG. 7B indicates that the fluorescence intensity increases from blue to red.
- the fluorescence intensity changed from green to yellow to red by addition of AcesvdfameK. This indicates that the addition of Aces ulfame K caused a calcium influx into the KT-1C cells and increased the intracellular calcium concentration.
- FIG. 7C shows the time course of calcium concentration for the cells indicated by the arrows in FIG. 7 7.
- the horizontal axis represents the time (minutes) from the start of the measurement, and the vertical axis represents the intracellular calcium concentration.
- the point indicated by the arrow indicates the time when Acesu ame ⁇ was added. From FIG. 7C, it can be understood that the added calcium of Acesulfame K caused a calcium influx into the KT-1C cell, resulting in an increase in the intracellular calcium concentration.
- KT-1C cells functionally express Tlr2 and Tlr3, which are sweet receptors, and have a sweet responsiveness. Therefore, it was shown that KT-1C cells can be used as a taste sensor for sensing sweetness and can be used to search for alternative sweeteners and sweet taste enhancers. 4788
- the cells having the sweetness response ability of this example were obtained by treating the cell strain KT-1B deposited as ERM BP-8347 with the MCDB basic medium C described in Examples 1-3. 1 C cells can be isolated by selecting the increase in intracellular calcium concentration due to the addition of Aceslfame K described above as an index.
- the cell line KT-1B when cultured in the presence of hydrocortisone, is an amyloid-sensitive sodium channel subunit ("ENaC
- the cell line KT-1B was treated with the hormones progesterone (0.1 ⁇ ⁇ M) ⁇ aldosterone (1 ⁇ M) or hydrocortisone (0.2 ⁇ ) for 6 days to express the salty channel ⁇ 3 ⁇ 4ENaC. Examined.
- RNA was extracted from the treated cell line KT- using a Trizol solution, and cDNA was synthesized on a 40-to-1 scale using a Super Script First Strand cDNA synthesis kit using the obtained 2 g RNA.
- cDNA solution (1 ⁇ 1) as type II
- 2.5 units of TakaraTaq manufactured by Takara
- primers 0.2 ⁇ M each
- SEQ ID NOs: 13 and 14 specific to salty channel ENaC. 5 minutes at 95 ° C on a 1 scale, and then 35 cycles of 1 minute at 95 ° C, 1 minute at 58 ° C, and 2 minutes at 72 ° C.
- a PCR reaction was performed.
- the PCR reaction solution (8-1) was electrophoresed on a 1.5% agarose gel, stained with ethidium umide, and photographed.
- Figure 8 shows the taste receptors in the cell line KT-1B treated with each hormone (lane 1: progesterone, lane 2: hydrocortisone, lane 3: aldosterone). Yuichi Shows the results of mRNA detection.
- N a imaging buffer one NaHC0 3 22mM, KC1 5mM, NaH 2 P0 4 1.25mM, Gunorekosu 10 mM
- N-methyl D-glucamine 124 mM
- lzl CoroNa-Red manufactured by Molecular Probe
- the dish was filled with 1 ml of a solution containing ImM MgCl 2 and 2 mM CaCl 2 in an imaging buffer, and NaCl, which is known to be a salty channel ligand, was added thereto to a final concentration of 50 mM. .
- FIG. 9A shows the fluorescence intensity before adding NaCl
- FIG. 9B shows the fluorescence intensity 0.5 minutes after the addition of NaC1.
- the color bar on the right side of FIG. 9B indicates that the fluorescence intensity is high from blue to red.
- the fluorescence intensity was changed from blue to yellow * red by the addition of NaCl. This indicates that the inflow of sodium into the KT-1C cell was caused by the addition of NaCl and the intracellular sodium concentration was increased.
- FIG. 9C shows the time course of sodium concentration for the cells indicated by the arrows in FIG. 9B.
- the horizontal axis represents the time (minutes) from the start of the measurement
- the vertical axis represents the intracellular sodium concentration.
- the point indicated by the down arrow indicates the time when 50 mM NaCl was added
- the point indicated by the up arrow indicates the time when 150 mM NaCl was added.
- FIG. 9C also shows that the addition of NaCl caused the influx of sodium into the KT-1C cell, resulting in an increase in intracellular sodium concentration.
- the intracellular sodium concentration also changed according to the added NaCl concentration.
- KT-1C cells functionally express the salty channel, ENaC, and have salty response ability. Therefore, it was shown that KT-1C cells can be used as a taste sensor for sensing salty taste and can be used to search for a salty substitute substance or a salty taste enhancing substance.
- the cell having the salty response ability of this example is KT-1 obtained by treating the cell strain KT-1B deposited as FERM BP-8347 with the MCDB basic medium C described in Examples 1-3.
- C cells can be isolated by selecting the above-mentioned increase in intracellular sodium concentration due to NaCl-added calo as an index.
- the cell line KT-1B was cultured in a 35 mm glass bottom dish (Matsunami glass), and when it reached 50-70% confluence, the KT-1B cells washed twice with PBS (-) were transferred to an imaging buffer.
- PBS PBS
- the fluorescence (490 nm) emitted by Fluo-3 due to the calcium flowing into the cytoplasm due to the addition of cycloheximide was measured by AquaCosmos Software One (Hamamatsu Photonics). The measurement was performed over time using an inverted fluorescence microscope (Leica, DMRIB) equipped with a CCD camera (manufactured by Hamamatsu Photonics, Inc.) controlled by the company. After the measurement, the time-dependent change of the fluorescence intensity in each cell was converted to a calcium concentration change using AquaCosmos software, and the time-dependent change was calculated and graphed.
- the cells having the bitter taste response ability in this example were obtained by simply selecting the cell line KT-1B deposited as FERM BP-8347 using the above-mentioned increase in intracellular calcium concentration by the addition of cycloheximide as an index. Can be released.
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2005505250A JPWO2004090122A1 (ja) | 2003-04-01 | 2004-04-01 | 舌上皮由来細胞株kt−1及びその用途 |
EP04725186A EP1621611A4 (en) | 2003-04-01 | 2004-04-01 | KT-1 CELL LINE OF THE LANGUAGE EPITHELIUM AND USE THEREOF |
US11/241,668 US20060040255A1 (en) | 2003-04-01 | 2005-09-30 | Cell line designated KT-1 established from tongue epithelial and use thereof |
Applications Claiming Priority (2)
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JP2003098516 | 2003-04-01 | ||
JP2003-098516 | 2003-04-01 |
Related Child Applications (1)
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US11/241,668 Continuation US20060040255A1 (en) | 2003-04-01 | 2005-09-30 | Cell line designated KT-1 established from tongue epithelial and use thereof |
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WO2004090122A1 true WO2004090122A1 (ja) | 2004-10-21 |
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PCT/JP2004/004788 WO2004090122A1 (ja) | 2003-04-01 | 2004-04-01 | 舌上皮由来細胞株kt-1及びその用途 |
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US (1) | US20060040255A1 (ja) |
EP (1) | EP1621611A4 (ja) |
JP (1) | JPWO2004090122A1 (ja) |
WO (1) | WO2004090122A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006044594A2 (en) | 2004-10-15 | 2006-04-27 | Monell Chemical Senses Center | Methods for culturing mammalian taste cells |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US9128079B2 (en) | 2011-08-08 | 2015-09-08 | The Coca-Cola Company | Methods of using lung or bronchial epithelial cells to identify bitter taste modulators |
EP2841565B1 (en) * | 2012-04-25 | 2018-02-21 | B.R.A.I.N. Biotechnology Research and Information Network AG | Human taste cells capable of continuous proliferation |
Family Cites Families (1)
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JP3698069B2 (ja) * | 2001-05-01 | 2005-09-21 | 独立行政法人食品総合研究所 | 新規遺伝子 |
-
2004
- 2004-04-01 JP JP2005505250A patent/JPWO2004090122A1/ja active Pending
- 2004-04-01 EP EP04725186A patent/EP1621611A4/en not_active Withdrawn
- 2004-04-01 WO PCT/JP2004/004788 patent/WO2004090122A1/ja not_active Application Discontinuation
-
2005
- 2005-09-30 US US11/241,668 patent/US20060040255A1/en not_active Abandoned
Non-Patent Citations (2)
Title |
---|
OKUMA TETSUYA ET AL.: "Hito no mikaku juyo system-sono saikochiku to sangyo riyo o mezashite", NATIONAL FOOD RESEARCH INSTITUTE, KENKYU NEWS, no. 6, March 2003 (2003-03-01), pages 4 - 5, XP002979695 * |
OOKURA T. ET AL.: "Fibroblast and epidermal growth factors modulates proliferation and neural cell adhesion molecule expression in epithelial cells derived from the adult mouse tongue", IN VITRO CELL. DEV. BIOL. -ANIMAL., vol. 38, 2002, pages 365 - 372, XP002903700 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006044594A2 (en) | 2004-10-15 | 2006-04-27 | Monell Chemical Senses Center | Methods for culturing mammalian taste cells |
EP1833961A2 (en) * | 2004-10-15 | 2007-09-19 | Monell Chemical Senses Center | Methods for culturing mammalian taste cells |
JP2008516604A (ja) * | 2004-10-15 | 2008-05-22 | モネル ケミカル センシズ センター | 哺乳動物の味覚細胞の培養方法 |
EP1833961A4 (en) * | 2004-10-15 | 2008-07-09 | Monell Chemical Senses Centre | METHOD FOR CULTIVATING TASTE CELLS FROM MAMMALS |
US7488599B2 (en) | 2004-10-15 | 2009-02-10 | Monell Chemical Senses Center | Methods for culturing mammalian taste cells |
US8030068B2 (en) | 2004-10-15 | 2011-10-04 | Monell Chemical Senses Center | Method for culturing mammalian taste cells |
US8460925B2 (en) | 2004-10-15 | 2013-06-11 | Monell Chemical Senses Center | Methods for culturing mammalian taste cells |
Also Published As
Publication number | Publication date |
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JPWO2004090122A1 (ja) | 2006-07-06 |
US20060040255A1 (en) | 2006-02-23 |
EP1621611A4 (en) | 2006-07-19 |
EP1621611A1 (en) | 2006-02-01 |
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