肝臓・膵臓・胆道内科

研究成果 1986 2019

1986
7 引用 (Scopus)

Primary ciliary dyskinesia with transverse colon carcinoma

Yoshida, J., Tsuneyoshi, M., Nakamura, K., Murakami, T. & Akamine, Y., 1 1 1986, : : American Journal of Clinical Pathology. 85, 1, p. 101-104 4 p.

研究成果: ジャーナルへの寄稿記事

Kartagener Syndrome
Situs Inversus
Transverse Colon
Carcinoma
Dyneins
1990
39 引用 (Scopus)

Intracellular distribution of the envelope glycoprotein of human immunodeficiency virus and its role in the production of cytopathic effect in CD4+ and CD4- human cell lines

Koga, Y., Sasaki, M., Nakamura, K., Kimura, G. & Nomoto, K., 1990, : : Journal of Virology. 64, 10, p. 4661-4671 11 p.

研究成果: ジャーナルへの寄稿記事

cytopathogenicity
human cell lines
Human immunodeficiency virus
Nuclear Pore
glycoproteins

Non-specific esterase positive neutrophils in a case of refractory anemia with excess of blasts

Nakamura, K., Ideguchi, H., Okajima, T. & Kato, K., 3 1 1990, : : [Rinsho ketsueki] The Japanese journal of clinical hematology. 31, 3, p. 386-390 5 p.

研究成果: ジャーナルへの寄稿記事

Refractory Anemia with Excess of Blasts
Carboxylesterase
Neutrophils
Bone Marrow
Pancytopenia
12 引用 (Scopus)

PERIOPERATIVE BLOOD TRANSFUSION AND GASTRIC CANCER: ADVERSE EFFECTS OR UNFAVOURABLE CONDITIONS OF PRETREATMENT?

Yamaguchi, K., Tokui, N., Maeda, S., Kominami, T., Nakamura, K. & Kitamura, K., 1 1 1990, : : Australian and New Zealand Journal of Surgery. 60, 10, p. 765-772 8 p.

研究成果: ジャーナルへの寄稿記事

Blood Transfusion
Stomach Neoplasms
Japan
Regression Analysis
1991
21 引用 (Scopus)

Accumulation of p60 lck in HTLV‐I‐transformed T Cell Lines Detected by an Anti‐Lck Monoclonal Antibody, MOL 171

Moroi, Y., Koga, Y., Nakamura, K., Ohtsu, M., Kimura, G. & Nomoto, K., 1 1 1991, : : Japanese Journal of Cancer Research. 82, 8, p. 909-915 7 p.

研究成果: ジャーナルへの寄稿記事

Lymphocyte Specific Protein Tyrosine Kinase p56(lck)
Monoclonal Antibodies
T-Lymphocytes
Cell Line
Complementary DNA
8 引用 (Scopus)

Differential expression of two lck transcripts directed from the distinct promoters in HTLV‐I+ and HTLV‐I T‐cells

Nakamura, K., Koga, Y., Yoshida, H., Kimura, G. & Nomoto, K., 1 1 1991, : : International Journal of Cancer. 48, 5, p. 789-793 5 p.

研究成果: ジャーナルへの寄稿記事

Cell Line
Messenger RNA
Untranslated Regions
Genes
Tyrosine
1992
7 引用 (Scopus)

Alteration of bile acid metabolism in two‐thirds hepatectomized rat

Nakamura, K., ICHIMIYA, HITOSHI. & NAKAYAMA, FUMIO., 1 1 1992, : : Journal of Gastroenterology and Hepatology. 7, 2, p. 121-127 7 p.

研究成果: ジャーナルへの寄稿記事

Bile Acids and Salts
Hepatectomy
Cholic Acid
Liver
Weights and Measures
7 引用 (Scopus)

A lymphocyte-specific protein tyrosine kinase, p56lck, regulates the PMA-induced internalization of CD4

Yoshida, H., Koga, Y., Nakamura, K., Kimura, G. & Nomoto, K., 11 17 1992, : : BBA - Molecular Cell Research. 1137, 3, p. 321-330 10 p.

研究成果: ジャーナルへの寄稿評論記事

CD4 Antigens
Protein-Tyrosine Kinases
Lymphocytes
T-Cell Antigen Receptor
CD27 Antigens
1993
8 引用 (Scopus)

Confirmation of Dieulafoy's Vascular Lesion by Endoscopic Ultrasonography in Three Cases

AKAHOSHI, K., CHIJIIWA, Y., MISAWA, T., AYUKAWA, K., Nakamura, K., JIMI, M., AKAMINE, Y. & NAWATA, H., 1 1 1993, : : Digestive Endoscopy. 5, 4, p. 383-390 8 p.

研究成果: ジャーナルへの寄稿記事

Endosonography
Blood Vessels
Endoscopic Hemostasis
Hemorrhage
Gastric Stump
1 引用 (Scopus)

Induction of Interleukin 2-Responsiveness in Thymocytes of the Transgenic Mice Carrying Ick -Transgene

Moroi, Y., Koga, Y., Nakamura, K., Nomoto, K., Ohtsu, M. & Kimura, G., 1 1 1993, : : MICROBIOLOGY and IMMUNOLOGY. 37, 5, p. 774-777 4 p.

研究成果: ジャーナルへの寄稿記事

Thymocytes
Transgenes
Transgenic Mice
Interleukin-2
Phosphotransferases
1994

A case oa juvenile polyps associated with unclassified colitis

Nakamura, K., Maruoka, A., Okabe, H., Akiho, H., Yasuda, D., Tanaka, M., Harada, N., Chijiiwa, Y. & Nawata, H., 1994, : : Japanese Journal of Gastroenterology. 91, 3, p. 335-339 5 p.

研究成果: ジャーナルへの寄稿記事

Colonic Polyps
Colitis
Colonoscopy
Polyps
54 引用 (Scopus)

Efficient degradation of trichloroethylene by a hybrid aromatic ring dioxygenase

Furukawa, K., Hirose, J., Hayashida, S. & Nakamura, K., 1 1 1994, : : Journal of bacteriology. 176, 7, p. 2121-2123 3 p.

研究成果: ジャーナルへの寄稿コメント/討論

Trichloroethylene
Dioxygenases
Genes
Ferredoxins
Operon
67 引用 (Scopus)

Gene replacement of the p53 gene with the lacz gene in mouse embryonic stem-cells and mice by using two steps of homologous recombination

Gondo, Y., Nakamura, K., Nakao, K., Sasaoka, T., Ito, K., Kimura, M. & Katsuki, M., 7 29 1994, : : Biochemical and Biophysical Research Communications. 202, 2, p. 830-837 8 p.

研究成果: ジャーナルへの寄稿記事

Lac Operon
Homologous Recombination
p53 Genes
Embryonic Stem Cells
Stem cells
9 引用 (Scopus)

Inhibition of the T-cell receptor-mediated signal transduction by microinjection of anti-Lck monoclonal antibody into T-cells

Nakamura, K., Koga, Y., Yoshida, H., Tanaka, K., Sasaki, M., Kimura, G. & Nomoto, K., 12 30 1994, : : BBA - Molecular Cell Research. 1224, 3, p. 495-505 11 p.

研究成果: ジャーナルへの寄稿記事

Microinjections
T-Cell Antigen Receptor
Signal Transduction
Monoclonal Antibodies
T-Lymphocytes
22 引用 (Scopus)

The difference in gp160 and gp120 of HIV type 1 in the induction of CD4 downregulation preceding single-cell killing

Koga, Y., Nakamura, K., Sasaki, M., Kimura, G. & Nomoto, K., 5 15 1994, : : Virology. 201, 1, p. 137-141 5 p., 71274.

研究成果: ジャーナルへの寄稿記事

HIV Envelope Protein gp160
HIV Envelope Protein gp120
HIV-1
Down-Regulation
Clone Cells
1995
25 引用 (Scopus)

Two endothelin receptors (ETA and ETB) expressed on circular smooth muscle cells of guinea pig cecum

Okabe, H., Chijiiwa, Y., Nakamura, K., Yoshinaga, M., Akiho, H., Harada, N. & Nawata, H., 1 1 1995, : : Gastroenterology. 108, 1, p. 51-57 7 p.

研究成果: ジャーナルへの寄稿記事

Endothelin Receptors
Cecum
Endothelin-1
Smooth Muscle Myocytes
Guinea Pigs
1996
13 引用 (Scopus)

Augmented expression of LCK message directed from the downstream promoter in human colorectal cancer specimens

Nakamura, K., Chijiiwa, Y. & Nawata, H., 1 1 1996, : : European Journal of Cancer Part A. 32, 8, p. 1401-1407 7 p.

研究成果: ジャーナルへの寄稿記事

Colorectal Neoplasms
Colon
Neoplasm Metastasis
Carcinoma
Cell Line
35 引用 (Scopus)

Traumatic rupture of hepatic hemangioma

Hotokezaka, M., Kojima, M., Nakamura, K., Hidaka, H., Nakano, Y., Tsuneyoshi, M. & Jimi, M., 7 1 1996, : : Journal of Clinical Gastroenterology. 23, 1, p. 69-71 3 p.

研究成果: ジャーナルへの寄稿記事

Hemangioma
Rupture
Traffic Accidents
Liver
Wounds and Injuries
1997
2 引用 (Scopus)

Expression of the placenta-specific, 100 kDa ras GTPase activating protein in several human cancer cell lines and normal human tissues

Araki, Y., Nakamura, K., Chijiiwa, Y. & Nawata, H., 11 3 1997, : : Molecular and Cellular Biochemistry. 175, 1-2, p. 195-204 10 p.

研究成果: ジャーナルへの寄稿記事

ras GTPase-Activating Proteins
Placenta
Cells
Tissue
Cell Line
1998
36 引用 (Scopus)

Adrenocortical and gonadal expression of the mammalian Ftz-F1 gene encoding Ad4BP/SF-1 is independent of pituitary control

Nomura, M., Kawabe, K., Matsushita, S., Oka, S., Hatano, O., Harada, N., Nawata, H. & Morohashi, K-I., 1 1 1998, : : Journal of Biochemistry. 124, 1, p. 217-224 8 p.

研究成果: ジャーナルへの寄稿記事

Gene encoding
Rats
Genes
Gonads
Tropics
12 引用 (Scopus)

A new approach to Pneumatosis cystoides intestinalis by target air- enema CT

Ihara, E., Harada, N., Motomura, S. & Chijiiwa, Y., 7 1 1998, : : American Journal of Gastroenterology. 93, 7, p. 1163-1164 2 p.

研究成果: ジャーナルへの寄稿記事

Pneumatosis Cystoides Intestinalis
Ascending Colon
Enema
Gases
Air
4 引用 (Scopus)

Complete response of early gastric cancer to uracil and tegafur

Akahoshi, K., Chijiiwa, Y., Hamada, S., Hara, K., Nakamura, K., Nawata, H. & Matsui, N., 12 1 1998, : : Journal of Gastroenterology. 33, 6, p. 864-867 4 p.

研究成果: ジャーナルへの寄稿記事

Tegafur
Uracil
Stomach Neoplasms
Endoscopy
Endosonography

Endosonographic probe-guided endoscopic resection of focal lymphoid hyperplasia of the rectum

Watabe, R., Araki, Y., Motomura, Y., Kubo, H., Ochiai, T., Hamada, S., Nakamura, K., Chijiiwa, Y., Nawata, H. & Matsui, N., 1 1 1998, : : Journal of Clinical Gastroenterology. 26, 4, p. 348-350 3 p.

研究成果: ジャーナルへの寄稿記事

Rectal Diseases
Endosonography
Lymphoid Tissue
Rectum
Endoscopy
16 引用 (Scopus)

Increased mRNA expression of a novel prostacyclin-stimulating factor in human colon cancer

Umeda, F., Ono, Y., Sekiguchi, N., Hashimoto, T., Masakado, M., Nakamura, K., Chijiiwa, Y. & Nawata, H., 4 1 1998, : : Journal of Gastroenterology. 33, 2, p. 213-217 5 p.

研究成果: ジャーナルへの寄稿記事

Epoprostenol
Colonic Neoplasms
Colon
Messenger RNA
Culture Media
9 引用 (Scopus)

Liver failure caused by hepatic angiodysplasia in hereditary hemorrhagic telangiectasia

Mukasa, C., Nakamura, K., Chijiiwa, Y., Sakai, H. & Nawata, H., 1 1 1998, : : American Journal of Gastroenterology. 93, 3, p. 471-473 3 p.

研究成果: ジャーナルへの寄稿記事

Angiodysplasia
Hereditary Hemorrhagic Telangiectasia
Liver Failure
Liver
Liver Diseases
4 引用 (Scopus)

Preoperative colonoscopic diagnosis of minute appendicular adenoma: Report of a case

Itaba, S., Akahoshi, K., Araki, Y., Nakamura, K., Chijiiwa, Y., Ohata, Y., Shimura, H. & Nawata, H., 8 11 1998, : : Endoscopy. 30, 5

研究成果: ジャーナルへの寄稿記事

Appendiceal Neoplasms
Colonoscopy
Adenoma
Biopsy
1999

A case of intestinal malrotation with bleeding of the jejunal diverticula

Wan, H., Ochiai, T., Nakamura, K., Harada, N., Chijiiwa, Y., Nawata, H. & Sasaki, I., 11 1 1999, : : Japanese Journal of Gastroenterology. 96, 11, p. 1276-1780 505 p.

研究成果: ジャーナルへの寄稿記事

Jejunal Diseases
Gastrointestinal Hemorrhage
Diverticulum
Intestines
Hemorrhage
98 引用 (Scopus)

Dax-1 as one of the target genes of Ad4BP/SF-1

Kawabe, K., Shikayama, T., Tsuboi, H., Oka, S., Oba, K., Yanase, T., Nawata, H. & Morohashi, K-I., 1 1 1999, : : Molecular Endocrinology. 13, 8, p. 1267-1284 18 p.

研究成果: ジャーナルへの寄稿記事

Genes
Hypogonadism
Electrophoretic Mobility Shift Assay
Pituitary Gland
Cytoplasmic and Nuclear Receptors

Gastroduodenal intussusception secondary to a gastric leiomyoma resulting in an ulceration

Araki, Y., Shiratsuchi, M., Yasuda, O., Nakamura, K., Chijiiwa, Y. & Nawata, H., 5 5 1999, : : Endoscopy. 31, 3

研究成果: ジャーナルへの寄稿記事

Duodenal Diseases
Gastrointestinal Endoscopy
Intussusception
Leiomyoma
Ulcer
18 引用 (Scopus)

Thapsigargin-induced endothelium-dependent triphasic regulation of vascular tone in the porcine renal artery

Ihara, E., Hirano, K., Nishimura, J., Nawata, H. & Kanaide, H., 11 9 1999, : : British Journal of Pharmacology. 128, 3, p. 689-699 11 p.

研究成果: ジャーナルへの寄稿記事

Thapsigargin
Renal Artery
Endothelium
Blood Vessels
Swine
2000
20 引用 (Scopus)

A combination of cyclosporin-A (CsA) and interferon-gamma (INF-γ) iduces apoptosis in human gastric carcinoma cells

Morisaki, T., Matsunaga, H., Beppu, K., Ihara, E., Hirano, K., Kanaide, H., Mori, M. & Katano, M., 12 27 2000, : : Anticancer research. 20, 5 B, p. 3363-3373 11 p.

研究成果: ジャーナルへの寄稿記事

Cyclosporine
Interferon-gamma
Stomach
Apoptosis
Carcinoma
104 引用 (Scopus)

Activated Self-MHC-reactive T cells have the cytokine phenotype of Th3/T regulatory cell 1 T cells

Kitani, A., Chua, K., Nakamura, K. & Strober, W., 7 15 2000, : : Journal of Immunology. 165, 2, p. 691-702 12 p.

研究成果: ジャーナルへの寄稿記事

Regulatory T-Lymphocytes
Clone Cells
Cytokines
T-Lymphocytes
Phenotype
4 引用 (Scopus)

Adrenocortical and gonadal differentiation regulated by transcription factors, Ad4BP/SF-1 (NR5A1) and Dax-I (NROB1)

Morohashi, K-I., Mukai, T., Kawabe, K., Suzuki, Mizusaki, H., Ishiharal, S., Umesono, K. & Kawajiri, K., 1 1 2000, : : Endocrine Research. 26, 4, 1 p.

研究成果: ジャーナルへの寄稿記事

Fushi Tarazu Transcription Factors
Steroidogenic Factor 1
Embryonic and Fetal Development
Repressor Proteins
Homeodomain Proteins
26 引用 (Scopus)

The mechanism of bradykinin-induced endothelium-dependent contraction and relaxation in the porcine interlobar renal artery

Ihara, E., Hirano, K., Derkach, D. N., Nishimura, J., Nawata, H. & Kanaide, H., 1 1 2000, : : British Journal of Pharmacology. 129, 5, p. 943-952 10 p.

研究成果: ジャーナルへの寄稿記事

Bradykinin
Renal Artery
Endothelium
Swine
Phenylephrine
36 引用 (Scopus)

Thrombin causes endothelium-dependent biphasic regulation of vascular tone in the porcine renal interlobar artery

Derkach, D. N., Ihara, E., Hirano, K., Nishimura, J., Takahashi, S. & Kanaide, H., 1 1 2000, : : British Journal of Pharmacology. 131, 8, p. 1635-1642 8 p.

研究成果: ジャーナルへの寄稿記事

Renal Artery
Thrombin
Endothelium
Blood Vessels
Swine
148 引用 (Scopus)
Interleukin-12 Receptors
Trinitrobenzenes
Intranasal Administration
Th1 Cells
Sulfonic Acids
2001
8 引用 (Scopus)

Ca2+ influx in the endothelial cells is required for the bradykinin-induced endothelium-dependent contraction in the porcine interlobar renal artery

Ihara, E., Derkach, D. N., Hirano, K., Nishimura, J., Nawata, H. & Kanaide, H., 8 1 2001, : : Journal of Physiology. 534, 3, p. 701-711 11 p.

研究成果: ジャーナルへの寄稿記事

Bradykinin
Renal Artery
Endothelium
Swine
Endothelial Cells
1246 引用 (Scopus)

Cell contact-dependent immunosuppression by CD4+CD25+ regulatory T cells is mediated by cell surface-bound transforming growth factor β

Nakamura, K., Kitani, A. & Strober, W., 9 3 2001, : : Journal of Experimental Medicine. 194, 5, p. 629-644 16 p.

研究成果: ジャーナルへの寄稿記事

Transforming Growth Factors
Regulatory T-Lymphocytes
Immunosuppression
T-Lymphocytes
CTLA-4 Antigen
2002
26 引用 (Scopus)

Mechanism of down-regulation of L-type Ca2+ channel in the proliferating smooth muscle cells of rat aorta

Ihara, E., Hirano, K., Hirano, M., Nishimura, J., Nawata, H. & Kanaide, H., 10 16 2002, : : Journal of Cellular Biochemistry. 87, 2, p. 242-251 10 p.

研究成果: ジャーナルへの寄稿記事

Depolarization
Bromodeoxyuridine
Volatile organic compounds
Smooth Muscle Myocytes
Muscle
37 引用 (Scopus)

PAR3β, a novel homologue of the cell polarity protein PAR3, localizes to tight junctions

Kohjima, M., Noda, Y., Takeya, R., Saito, N., Takeuchi, K. & Sumimoto, H., 12 1 2002, : : Biochemical and Biophysical Research Communications. 299, 4, p. 641-646 6 p.

研究成果: ジャーナルへの寄稿記事

Cell Polarity
Tight Junctions
PDZ Domains
Proteins
Vertebrates
37 引用 (Scopus)

Sexually dimorphic expression of Dax-1 in the adrenal cortex

Mukai, T., Kusaka, M., Kawabe, K., Goto, K., Nawata, H., Fujieda, K. & Morohashi, K-I., 8 7 2002, : : Genes to Cells. 7, 7, p. 717-729 13 p.

研究成果: ジャーナルへの寄稿記事

Adrenal Cortex
Genes
Androgen Receptors
Ligands
Hypogonadism
2003
3 引用 (Scopus)

A case of mediastinal pancreatic pseudocysts conservatively treated with somatostatin analogue

Akashi, T., Kawabe, K., Sakamoto, R., Gibo, J., Inoue, N., Kojima, M., Hisano, T., Arita, Y., Ito, T. & Nawata, H., 6 1 2003, : : Japanese Journal of Gastroenterology. 100, 6, p. 713-718 6 p.

研究成果: ジャーナルへの寄稿記事

Pancreatic Pseudocyst
Somatostatin
109 引用 (Scopus)

Dax-1 (dosage-sensitive sex reversal-adrenal hypoplasia congenita critical region on the X chromosome, gene 1) gene transcription is regulated by Wnt4 in the female developing gonad

Mizusaki, H., Kawabe, K., Mukai, T., Ariyoshi, E., Kasahara, M., Yoshioka, H., Swain, A. & Morohashi, K-I., 4 1 2003, : : Molecular Endocrinology. 17, 4, p. 507-519 13 p.

研究成果: ジャーナルへの寄稿記事

X-Linked Genes
Chromosomes, Human, Pair 1
Gonads
Catenins
Steroidogenic Factor 1
19 引用 (Scopus)

Inhibition of interferon-γ-activated nuclear factor-κB by cyclosporin A: A possible mechanism for synergistic induction of apoptosis by interferon-γ and cyclosporin A in gastric carcinoma cells

Beppu, K., Morisaki, T., Matsunaga, H., Uchiyama, A., Ihara, E., Hirano, K., Kanaide, H., Tanaka, M. & Katano, M., 6 13 2003, : : Biochemical and Biophysical Research Communications. 305, 4, p. 797-805 9 p.

研究成果: ジャーナルへの寄稿記事

Interferons
Cyclosporine
Stomach
Cells
Apoptosis
65 引用 (Scopus)

Molecular Recognition in Dimerization between PB1 Domains

Noda, Y., Kohjima, M., Izaki, T., Ota, K., Yoshinaga, S., Inagaki, F., Ito, T. & Sumimoto, H., 10 31 2003, : : Journal of Biological Chemistry. 278, 44, p. 43516-43524 9 p.

研究成果: ジャーナルへの寄稿記事

Molecular recognition
Dimerization
Lysine
Proteins
Coulomb interactions
13 引用 (Scopus)

Novel germline mutation of the PTEN gene in a Japanese family with Cowden disease

Harada, N., Sugimura, T., Yoshimura, R., Motomura, S., Shirahama, S., Naramoto, J. I., Chijiiwa, Y., Nakamura, K., Ito, K. I. & Nawata, H., 1 1 2003, : : Journal of gastroenterology. 38, 1, p. 87-91 5 p.

研究成果: ジャーナルへの寄稿記事

Multiple Hamartoma Syndrome
Germ-Line Mutation
Exons
Palmoplantar Keratoderma
Terminator Codon
299 引用 (Scopus)

Novel Human Homologues of p47phox and p67phox Participate in Activation of Superoxide-producing NADPH Oxidases

Takeya, R., Yamamoto, N., Kami, K., Taura, M., Kohjima, M., Izaki, T., Nunoi, H. & Sumimoto, H., 7 4 2003, : : Journal of Biological Chemistry. 278, 27, p. 25234-25246 13 p.

研究成果: ジャーナルへの寄稿記事

NADPH Oxidase
Superoxides
Chemical activation
src Homology Domains
Phagocytes
30 引用 (Scopus)

The PB1 domain and the PC motif-containing region are structurally similar protein binding modules

Yoshinaga, S., Kohjima, M., Ogura, K., Yokochi, M., Takeya, R., Ito, T., Sumimoto, H. & Inagaki, F., 10 1 2003, : : EMBO Journal. 22, 19, p. 4888-4897 10 p.

研究成果: ジャーナルへの寄稿記事

Ubiquitin
Protein Binding
Amino Acid Motifs
Saccharomycetales
Static Electricity
187 引用 (Scopus)

Transforming Growth Factor (TGF)-β1-producing Regulatory T Cells Induce Smad-mediated Interleukin 10 Secretion That Facilitates Coordinated Immunoregulatory Activity and Amelioration of TGF-β1-mediated Fibrosis

Kitani, A., Fuss, I., Nakamura, K., Kumaki, F., Usui, T. & Strober, W., 10 20 2003, : : Journal of Experimental Medicine. 198, 8, p. 1179-1188 10 p.

研究成果: ジャーナルへの寄稿記事

Transforming Growth Factors
Regulatory T-Lymphocytes
Interleukin-10
Fibrosis
Doxycycline
2004
3 引用 (Scopus)

Acute pancreatitis in the early stages of pregnancy associated with a PSTI gene mutation [1]

Inoue, N., Ito, T., Akashi, T., Kawabe, K., ono, T., Gibo, J., Arita, Y., Nawata, H. & Funakoshi, A., 10 1 2004, : : Pancreas. 29, 3, p. 242-243 2 p.

研究成果: ジャーナルへの寄稿レター