101
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Kirat D, Inoue H, Iwano H, Hirayama K, Yokota H, Taniyama H, Kato S. Monocarboxylate transporter 1 gene expression in the ovine gastrointestinal tract. Vet J 2006; 171:462-7. [PMID: 16624712 DOI: 10.1016/j.tvjl.2004.12.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/03/2004] [Indexed: 11/21/2022]
Abstract
In this study, we investigated the tissue distribution and expression of monocarboxylate transporter 1 (MCT1) along the gastrointestinal tract of sheep. Western blot analysis suggested the presence of MCT1 as a 43-kDa protein in immunoblots of membranes from the various tissues examined. The results of Western blotting were further confirmed by immunohistochemical studies, which revealed intense immunoreactivity for the MCT1 protein in the forestomach (rumen, reticulum and omasum) and large intestine (caecum, proximal and distal colon). Moderate reactivity, however, was detected in the abomasum, while no immunoreactivity could be seen in any regions of the small intestine examined. Furthermore, MCT1 was expressed at the mRNA level as determined by reverse transcriptase polymerase chain reaction (RT-PCR), which showed a band of the expected size (300 bp) in all tissues examined. From these results we concluded that MCT1 protein is highly expressed and distributed in the stomach and large intestine of sheep suggesting that MCT1 may play a significant role in the transport of short chain fatty acids and their metabolites in the gastrointestinal tract of ruminants.
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Okamoto M, Tanaka K, Tsunokawa M, Kasamatsu M, Yokota H, Tanida K, Kawasako K, Komine M, Akihara Y, Shimoyama Y, Hirayama K, Kikuchi N, Taniyama H. Small intestinal volvulus in a captive Steller sea lion (Eumetopias jubatus). Vet Rec 2006; 159:21-3. [PMID: 16816158 DOI: 10.1136/vr.159.1.21] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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103
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Tagami T, Kushimoto S, Atsumi T, Matsuda K, Miyazaki Y, Oyama R, Koido Y, Kawai M, Yokota H, Yamamoto Y. Crit Care 2006; 10:P352. [DOI: 10.1186/cc4699] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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104
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Nagao K, Takahara Y, Asai H, Hayashi N, Kitayama T, Yoshimura Y, Yokota H, Kita K. Dietary Fatty Acid Supplementation during Transitional Period Increases Milk Production in Dairy Cows. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2005. [DOI: 10.5713/ajas.2005.1105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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105
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Kita K, Harada K, Nagao K, Yokota H. Characteristics of Gene Structure of Bovine Ghrelin and Influence of Aging on Plasma Ghrelin. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2005. [DOI: 10.5713/ajas.2005.723] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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106
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Yokota H, Mori F, Kai K, Nagaoka T, Izumi N, Takahashi A, Hikichi T, Yoshida A, Suzuki F, Ishida Y. Serum prorenin levels and diabetic retinopathy in type 2 diabetes: new method to measure serum level of prorenin using antibody activating direct kinetic assay. Br J Ophthalmol 2005; 89:871-3. [PMID: 15965169 PMCID: PMC1772730 DOI: 10.1136/bjo.2004.056580] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
AIM To investigate the serum levels of prorenin and its correlation with the severity of diabetic retinopathy (DR). METHODS 248 patients with diabetes and 108 control subjects were divided into four groups: no-DR (n = 146), no proliferative diabetic retinopathy (no-PDR) (n = 78), PDR (n = 24), and controls (n = 108). Serum levels of prorenin from all subjects were measured using the new antibody activating direct kinetic (AAD-PR) assay. The serum prorenin levels were compared among the groups. RESULTS The serum levels of prorenin in the control, no-DR, no-PDR, and PDR groups, respectively, were 109.1 (66.1), 194.6 (160.4), 271.5 (220.3), and 428.4 (358.4) pg/ml (mean (SD)). Prorenin in the PDR group was remarkably high compared with the control and no-DR groups (p<0.0001) and with the no-PDR group (p = 0.002). Serum levels of prorenin increased with increasingly severe retinopathy. No correlation was found between the prorenin level and the duration of disease or HbA(1c). CONCLUSIONS The serum levels of prorenin in patients with PDR were found to be markedly high using the AAD-PR assay. Increased levels of prorenin in diabetes may have an important role in the pathogenesis of DR.
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107
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Sato S, Yokota Y, Yokota H, Yokota M, Araki Y. A Novel Method for Mechanically-Assisted Hatching Using a Razor on Human Blastocyst Embryos. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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108
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Kirat D, Inoue H, Iwano H, Hirayama K, Yokota H, Taniyama H, Kato S. Expression and distribution of monocarboxylate transporter 1 (MCT1) in the gastrointestinal tract of calves. Res Vet Sci 2005; 79:45-50. [PMID: 15894023 DOI: 10.1016/j.rvsc.2004.11.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2004] [Revised: 09/13/2004] [Accepted: 11/04/2004] [Indexed: 11/16/2022]
Abstract
In the present study the expression and distribution of monocarboxylate transporter 1 (MCT1) along the gastrointestinal tract (rumen, reticulum, omasum, abomasum, duodenum, jejunum, ileum, cecum and colon) of calves were investigated on both mRNA and protein levels. The expression of MCT1 protein and its distribution were determined by Western blotting and immunohistochemical staining, respectively by using antibody for MCT1. MCT1 protein was visualized as a 43-kDa band on immunoblots of the membrane proteins prepared from the various regions examined, and it was more highly expressed in forestomach and large intestine than in abomasum and small intestine. With the use of reverse transcriptase-polymerase chain reaction, mRNA encoding for MCT1 was demonstrated in the different tissues examined. The immunohistochemical study confirmed the Western blot findings and showed strong MCT1 immunopositive staining in the stratified squamous epithelia of the forestomach as well as the epithelial cells lining the digestive tract in the cecum, proximal colon, and distal colon. The results suggest that MCT1 may play a role in the transport of SCFA and their metabolites in the gastrointestinal tract of bovines.
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109
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Kimura J, Hirano Y, Takemoto S, Nambo Y, Ishinazaka T, Himeno R, Mishima T, Tsumagari S, Yokota H. Three-dimensional reconstruction of the equine ovary. Anat Histol Embryol 2005; 34:48-51. [PMID: 15649227 DOI: 10.1111/j.1439-0264.2004.00567.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The equine ovary has a very unique structure in terms of its extreme large size, the presence of the ovulation fossa and the inverted location of its cortex and medulla. In the previous study, it was recognized that the application of three-dimensional internal structure microscopy (3D-ISM) to observe the mare ovary is very effective. Three-dimensional reconstruction of serially sliced images made by 3D-ISM was successful in this study with the aid of the sophisticated image processing technique. The rotation of the reconstructed ovary has been carried out with and without the application of the transparency technique in the ovarian stromal region. The spatial localization of follicles and corpus luteum was clearly visualized by rotating the reconstructed image of the ovary. The extraction of the images of follicles and corpus luteum was also available and gave a quantifiable understanding of their structure.
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110
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Kasamaki S, Kamano T, Hayashida Y, Motoyama H, Yokota H. A percutaneous endoscopic gastrostomy tube pushed through the posterior wall of the stomach as far as the pancreas during nonendoscopic tube exchange. Endoscopy 2005; 37:602. [PMID: 15933942 DOI: 10.1055/s-2005-861100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
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111
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Maruyama S, Yokoyama I, Asai H, Sakaguchi S, Ohtani T, Yokota H, Kita K. Influence of Ripening Stages on the Quality of Whole Crop Silage and Grain Silage of Fodder Rice. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2005. [DOI: 10.5713/ajas.2005.340] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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112
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Kawamoto N, Horikoshi T, Nomura K, Yokota H, Negishi Y, Tobita E, Terano M. Novel stabilization system for polypropylene via the Ziegler-Natta catalyzed polymerization in the presence of aluminum aryloxide. J Appl Polym Sci 2005. [DOI: 10.1002/app.22309] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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113
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Hiroi H, Tsutsumi O, Takeuchi T, Momoeda M, Ikezuki Y, Okamura A, Yokota H, Taketani Y. Differences in serum bisphenol a concentrations in premenopausal normal women and women with endometrial hyperplasia. Endocr J 2004; 51:595-600. [PMID: 15644579 DOI: 10.1507/endocrj.51.595] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Exposure to endocrine disrupting chemicals (EDCs) has been raised in relation to its potential for adverse health outcomes. Bisphenol A (BPA) is an estrogenic EDC widely found in plastic products. We determined BPA concentrations in premenopausal women by an enzyme-linked immunosorbent assay and evaluated possible linkage between its contamination levels and endometrial hyperplasia, an estrogen-related disorder of the uterus. It has been implied that higher levels of BPA, which binds to estrogen receptor and plays estrogenic roles may, enhance endometrial hyperplasia. Serum BPA was detectable in all subjects and its concentrations in healthy controls with normal endometrium were 2.5 +/- 1.5 ng/ml (mean +/- SD). BPA levels in patients with simple endometrial hyperplasia with benign nature were 2.9 +/- 2.0 ng/ml and were not significantly different from the controls. Unexpectedly, BPA levels in patients with complex endometrial hyperplasia with malignant potential were 1.4 +/- 0.4 ng/ml and significantly lower compared to both control and simple endometrial hyperplasia groups. In addition, we measured the serum BPA levels in postmenopausal endometrial cancer patient (1.4 +/- 0.5 ng/ml), which were also significantly lower than control and simple endometrial hyperplasia groups. These findings suggest the presence of associations between BPA exposure and complex endometrial hyperplasia and endometrial cancer. The mode of action of BPA may be more complex than expected and the contradictory results may serve as a clue to addressing the mechanisms of linkage between occurrence of estrogen-dependent diseases and endocrine disruption.
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114
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Kondo M, Kita K, Yokota H. The effects of supplementation with green tea waste
on in vivo and in vitro rumen fermentation in cattle. JOURNAL OF ANIMAL AND FEED SCIENCES 2004. [DOI: 10.22358/jafs/73755/2004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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115
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Kirat D, Inoue H, Iwano H, Yokota H, Kato S. Monocarboxylate transporter 1 (MCT1)
in calf and sheep stomach. JOURNAL OF ANIMAL AND FEED SCIENCES 2004. [DOI: 10.22358/jafs/73885/2004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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116
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Nagaoka T, Kitaya N, Sugawara R, Yokota H, Mori F, Hikichi T, Fujio N, Yoshida A. Alteration of choroidal circulation in the foveal region in patients with type 2 diabetes. Br J Ophthalmol 2004; 88:1060-3. [PMID: 15258025 PMCID: PMC1772269 DOI: 10.1136/bjo.2003.035345] [Citation(s) in RCA: 199] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
AIM To investigate changes in choroidal blood flow (CBF) in the foveal region in patients with type 2 diabetes. METHODS Laser Doppler flowmetry was used to determine the CBF in the foveal region in 70 patients with type 2 diabetes and 36 age and sex matched healthy subjects (control group). The patients were classified into three groups: 33 patients (33 eyes) with no diabetic retinopathy (NDR), 20 patients (20 eyes) with non-proliferative diabetic retinopathy and no macular oedema (NPDR/MO-), and 17 patients (17 eyes) with NPDR and MO (NPDR/MO+). Optical coherence tomography was also used to measure the foveal thickness. RESULTS The group averaged CBF values were 13.5 (4.9), 9.4 (2.5), 10.8 (4.8), and 5.6 (2.0) (arbitrary units) in the control, NDR, NPDR/MO-, and NPDR/MO+ groups, respectively. The group averaged CBF values in the NDR group decreased (30.2%; p<0.01) compared with the control group. The average CBF value in the NPDR/MO+ group was also significantly lower (48.2%; p<0.01) compared with that in the NPDR/MO- group. CONCLUSION The CBF in the foveal region significantly decreases in patients with diabetes, especially those with macular oedema.
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117
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Kasamaki S, Kamano T, Hayashida Y, Motoyama H, Yokota H. Multiple stercoral ulcers caused by habitual excessive daily intake of natto (fermented soybeans). Endoscopy 2004; 36:571-2. [PMID: 15202066 DOI: 10.1055/s-2004-814432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
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118
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Yokota H. 4.5 K Cooling System for a Cryogenically Cooled Probe for a 920 MHz NMR. ACTA ACUST UNITED AC 2004. [DOI: 10.1063/1.1774884] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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119
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Fujikata J, Ishi T, Yokota H, Kato K, Yanagisawa M, Nakada M, Ishihara K, Ohashi K, Thio T, Linke R. Surface Plasmon Enhancement Effect and Its Application to Near-Field Optical Recordin. ACTA ACUST UNITED AC 2004. [DOI: 10.3379/tmjpn2001.4.255] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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120
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Matoba M, Tonami H, Kuginuki M, Yokota H, Takashima S, Yamamoto I. Comparison of high-resolution contrast-enhanced 3D MRA with digital subtraction angiography in the evaluation of hepatic arterial anatomy. Clin Radiol 2003; 58:463-8. [PMID: 12788315 DOI: 10.1016/s0009-9260(03)00085-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
AIM To evaluate the validity of high-resolution contrast-enhanced three-dimensional magnetic resonance angiography (MRA) in defining hepatic arterial anatomy and to compare this with digital subtraction angiography (DSA). MATERIALS AND METHODS MRA and DSA were performed in 30 patients. MRA was performed with breath-hold, gadolinium-enhanced, three-dimensional, fast low-angle shot sequence with a 512 pixel matrix. MRA was compared with DSA in terms of image quality and depiction of hepatic arterial anatomy. The agreement in image quality between MRA and DSA was determined with the kappa statistic. RESULTS With respect to image quality, there was excellent or good correlation between MRA and DSA for the common hepatic artery (kappa=0.85), proper hepatic artery (kappa=0.72), gastroduodenal artery (kappa=0.70), left hepatic artery (kappa=0.49), left gastric artery (kappa=0.50), splenic artery (kappa=0.84), and superior mesenteric artery (kappa=0.88). Poor correlation was found for the right hepatic artery (kappa=0.18) and right gastric artery (kappa=0.38). With regard to hepatic arterial anatomy, MRA correlated correctly with DSA in 28 of the 29 cases, i.e. 97% of patients. CONCLUSION MRA is a useful technique for the evaluation of the hepatic artery, and for the vast majority of patients, MRA can replace intra-arterial DSA.
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121
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Hutchinson TH, Yokota H, Hagino S, Ozato K. Development of fish tests for endocrine disruptors. PURE APPL CHEM 2003. [DOI: 10.1351/pac200375112343] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
International concern over endocrine active substances (EASs) has led to intensive research programmes to establish fish reproductive and developmental toxicity tests for use in environmental (ecological) risk assessment. This chapter gives an overview of key themes of in vivo ecotoxicology research, including fish screening assays, partial life-cycle tests (the draft OECD fish reproduction test and the new fish development test) and fish full life-cycle tests. In the context of the OECD test guidelines program, fish species of primary interest include fathead minnow, medaka and zebrafish, while guppy, rainbow trout, sheepshead minnow, and three-spined stickleback are also of scientific importance. Critical factors for evaluation include baseline reproductive biology and definition of EAS sensitive life-stages. For regulatory applications, a critical review of existing fish EAS data suggests that apical adverse effect endpoints, namely development, growth and reproduction (e.g., fecundity, fertilization rates, and hatching success) should be used to derive predicted no-effect concentrations (PNECs) for the environmental risk assessment of EASs. In support of these apical adverse effect endpoints, biomarker responses (e.g., vitellogenin, gonadal-somatic index, and gonad histopathology) should be used to provide mechanistic data, compare species (e.g., cyprinids vs. salmonids), and allow extrapolation between laboratory and field studies.
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Hirano Y, Yokota H, Kita K. Increase in Plasma HDL-Cholesterol Concentration in Goats Fed Sesame Meal Is Related to Ether Extract Fraction Included in the Meal. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2003. [DOI: 10.5713/ajas.2003.511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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123
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Nakanishi TM, Okuni Y, Furukawa J, Tanoi K, Yokota H, Ikeue N, Matsubayashi M, Uchida H, Tsiji A. J Radioanal Nucl Chem 2003; 255:149-153. [DOI: 10.1023/a:1022252419649] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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124
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Kita K, Oka M, Yokota H. Dietary Fatty Acid Increases Body Weight Gain without a Change in Rumen Fermentation in Fattening Cattle. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2003. [DOI: 10.5713/ajas.2003.39] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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125
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Fujii S, Kitayama J, Kaisaki S, Sasaki S, Seto Y, Tominaga O, Tsuno N, Umetani N, Yokota H, Kitamura K, Tsuruo T, Nagawa H. Carcinoembryonic antigen mRNA in abdominal cavity as a useful predictor of peritoneal recurrence of gastric cancer with serosal exposure. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2002; 21:547-53. [PMID: 12636101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Peritoneal dissemination is the most frequent type of recurrence in patients with gastric cancer with serosal exposure, irrespective of whether they have undergone curative gastrectomy. The purpose of this study was to establish a method to detect micrometastatic cells in the abdominal cavity and predict peritoneal recurrence in patients with such gastric carcinomas. A total of 86 patients with gastric carcinoma, undergoing gastrectomy, were examined. Reverse transcriptase-polymerase chain reaction (RT-PCR) assay was used to detect carcinoembryonic antigen (CEA) mRNA in abdominal lavage fluid. Twenty-four cases without serosal exposure were negative, while all 13 cases with macroscopic peritoneal dissemination were positive for CEA mRNA. Among the 49 cases with macroscopic serosal invasion and without peritoneal metastasis, cancer cells were detected in 27 cases with RT-PCR while in only 6 cases with conventional cytology. All cytologically-positive cases were also positive for CEA mRNA. Among the 27 CEA-positive cases, 15 patients (56%) relapsed with peritoneal metastasis within 12 months after gastrectomy. In contrast, none of the 22 CEA-negative cases had peritoneal recurrence within 16-60 months of observation, whereas in 43 cytologically-negative cases, 10 patients relapsed with peritoneal recurrence. As compared with conventional cytological examination, this method would be clinically more beneficial for detecting free cancer cells in the peritoneal cavity and for predicting peritoneal recurrence in gastric carcinoma with serosal invasion.
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