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Okamura H, Yamaguchi A, Kimura N, Yuri K, Matsumoto H, Adachi K, Adachi H. Aortic Valve Replacement with a 19-mm Perimount Magna/Magna Ease Bioprosthesis has Comparable Early and Late Outcomes with Greater Than a 19-mm Prosthesis in Patients with Aortic Stenosis: A Propensity Score-matched Analysis. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Takahashi T, Fujimoto N, Yamaguchi A, Hayashi H, Migita K, Ida H, Tanaka T. Familial Mediterranean fever with onset in the 70s showing various neutrophilic dermatosis. J Eur Acad Dermatol Venereol 2015; 30:e129-e131. [PMID: 26448397 DOI: 10.1111/jdv.13407] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Mizutani M, Toya S, Yamaguchi A. Surgical training program for general dental practitioners. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Toya S, Mizutani M, Yamaguchi A. The effectiveness of pilocarpine hydrochloride for dry mouth symptoms of Sjögren's syndrome – examining the adjustments on the number of times of its administration. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Murakawa S, Yamaguchi A, Arai M, Wasai M, Aoki Y, Ishimoto H, Nomura R, Okuda Y, Nagato Y, Higashitani S, Nagai K. Spin-dependent acoustic response in the nonunitary A1 and A2 phases of superfluid 3He under high magnetic fields. PHYSICAL REVIEW LETTERS 2015; 114:105304. [PMID: 25815943 DOI: 10.1103/physrevlett.114.105304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Indexed: 06/04/2023]
Abstract
The transverse acoustic impedance of superfluid ^{3}He was measured in the A1 and A2 phases up to 13 T to investigate the surface states in nonunitary superfluids. The temperature dependence of the impedance was much larger in the A1 phase than in the A2 phase. This nonsymmetric behavior indicates that momentum exchange with walls for spin-down surface states is quite different from that for spin-up surface states. The spin-dependent response might be a reflection of an essential feature of the nonunitary states where gap amplitudes depend on spin states. Weak-coupling theories ignore any spin-dependent processes and do not account for the nonsymmetric behavior.
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Hara R, Fukuoka T, Takahashi R, Utsumi Y, Yamaguchi A. Surface-enhanced Raman spectroscopy using a coffee-ring-type three-dimensional silver nanostructure. RSC Adv 2015. [DOI: 10.1039/c4ra09309g] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
We demonstrated surface-enhanced Raman spectroscopy using a coffee-ring-type three-dimensional silver nanostructure (Ag3D).
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Asai K, Yamori M, Yamazaki T, Yamaguchi A, Takahashi K, Sekine A, Kosugi S, Matsuda F, Nakayama T, Bessho K. Tooth loss and atherosclerosis: the Nagahama Study. J Dent Res 2014; 94:52S-58S. [PMID: 25406168 DOI: 10.1177/0022034514559127] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Several epidemiologic studies have suggested that oral disease is a risk factor for cardiovascular disease (CVD). However, whether a clinically significant association exists between the 2 disorders remains controversial. Here, we investigated the association between tooth loss, as an indicator of oral disease, and arterial stiffness, as a marker of atherosclerosis, in Japanese adults. Cross-sectional data were collected for 8,124 persons aged 30 to 75 y with no history of tooth loss for noninflammatory reasons, such as orthodontic treatment, malposition, and trauma. Participants received a comprehensive dental examination and extensive in-person measurements of CVD risk factors, and arterial stiffness was evaluated using the cardio-ankle vascular index (CAVI). We examined the association between CAVI and tooth loss using general linear models with adjustment for age, sex, body mass index, smoking status, hemoglobin A1c, and a history of insulin or hypoglycemic medication depending on the model. In addition, we performed an analysis that included interaction terms of the centered variables tooth loss, sex, and age. The results of the multiple regression analysis that included the interaction terms detected that the relationship between CAVI and tooth loss was dependent on sex, with only men showing a positive correlation (β for interaction = 0.04; 95% confidence interval, 0.02-0.06). The findings from this study suggest that a linear relationship exists between tooth loss and degree of arterial stiffness and that the association differed depending on sex.
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Okamura H, Yamaguchi A, Kimura N, Itoh S, Yuri K, Matsumoto H, Adachi H. 256 * MITRAL VALVE REPAIR HAS BETTER LONG-TERM OUTCOMES COMPARED WITH MITRAL VALVE REPLACEMENT IN ELDERLY PATIENTS WITH MITRAL REGURGITATION. Interact Cardiovasc Thorac Surg 2014. [DOI: 10.1093/icvts/ivu276.256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Watanabe N, Kimura S, Yamaguchi A, Hara Y. PP234-MON: Comparison of the Nutritional Values of a Mediterranean Diet with Japanese and American Diets. Clin Nutr 2014. [DOI: 10.1016/s0261-5614(14)50568-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Fukui Y, Samma S, Fujimoto K, Yamaguchi A, Umeki Y, Ooto M, Arima M. Reticulocyte hemoglobin content as a marker of iron status in patients receiving maintenance hemodialysis. Clin Exp Nephrol 2014; 6:147-53. [PMID: 24989954 DOI: 10.1007/s101570200025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Background. Patients with renal anemia who show a poor response to erythropoietin might have iron insufficiency. Reticulocyte hemoglobin content (CHr) was measured in hemodialysis patients, and its potential as a marker for iron status was assessed by comparing CHr with ordinary markers. Methods. Ninety-one patients receiving maintenance hemodialysis were enrolled. Venous sampling was performed twice, at a 3-month interval. During the interval, none of the patients received any iron agent and there was no alteration in their erythropoietin doses. CHr was measured with an automated blood cell counter. Simultaneously, ordinary markers for iron status, such as hematocrit (Ht), mean hemoglobin content (CH), serum iron (Fe), ferritin (Fr), and transferrin saturation (TSAT), were measured. CHr was compared with these markers. Results. CHr randed from 24.1 to 34.7 pg, with a mean of 31.0 pg. CHr correlated with CH (P < 0.001), Fr (P < 0.01), Fe (P < 0.001), and TSAT (P < 0.001), but not with Ht. When patients were divided into two groups according to the CHr : CH ratio (CHr : CH ≧ 1 and CHr : CH < 1), there was no difference in any parameter between the two groups in the first measurement. In the second measurement, done after a 3-month interval, patients with CHr : CH ≧ 1 showed significantly higher values for CHr (P < 0.001), CH (P < 0.01), Fe (P < 0.05), and TSAT (P < 0.05) than patients with CHr : CH < 1. Conclusions. It was suggested that the CHr : CH ratio would predict changes in the state of iron supply. CHr might be a potential marker for monitoring renal anemia.
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Ledezma-Gairaud M, Grangel L, Aromí G, Fujisawa T, Yamaguchi A, Sumiyama A, Sañudo EC. From Serendipitous Assembly to Controlled Synthesis of 3d–4f Single-Molecule Magnets. Inorg Chem 2014; 53:5878-80. [DOI: 10.1021/ic500418e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Uezumi A, Fukada S, Yamamoto N, Ikemoto-Uezumi M, Nakatani M, Morita M, Yamaguchi A, Yamada H, Nishino I, Hamada Y, Tsuchida K. Identification and characterization of PDGFRα+ mesenchymal progenitors in human skeletal muscle. Cell Death Dis 2014; 5:e1186. [PMID: 24743741 PMCID: PMC4001314 DOI: 10.1038/cddis.2014.161] [Citation(s) in RCA: 190] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 03/03/2014] [Accepted: 03/04/2014] [Indexed: 02/07/2023]
Abstract
Fatty and fibrous connective tissue formation is a hallmark of diseased skeletal muscle and deteriorates muscle function. We previously identified non-myogenic mesenchymal progenitors that contribute to adipogenesis and fibrogenesis in mouse skeletal muscle. In this study, we report the identification and characterization of a human counterpart to these progenitors. By using PDGFRα as a specific marker, mesenchymal progenitors can be identified in the interstitium and isolated from human skeletal muscle. PDGFRα+ cells represent a cell population distinct from CD56+ myogenic cells, and adipogenic and fibrogenic potentials were highly enriched in the PDGFRα+ population. Activation of PDGFRα stimulates proliferation of PDGFRα+ cells through PI3K-Akt and MEK2-MAPK signaling pathways, and aberrant accumulation of PDGFRα+ cells was conspicuous in muscles of patients with both genetic and non-genetic muscle diseases. Our results revealed the pathological relevance of PDGFRα+ mesenchymal progenitors to human muscle diseases and provide a basis for developing therapeutic strategy to treat muscle diseases.
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Yamaguchi A, Sako K, Sato K, Hayashizaki N, Hattori T. Measurement of beam characteristics from C(6+) laser ion source. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2014; 85:02B921. [PMID: 24593626 DOI: 10.1063/1.4847197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We developed a C(6+) laser ion source for a heavy-ion accelerator. A carbon target was irradiated with a Q-switched Nd:YAG laser (1064 nm wavelength, 1.4 J maximum laser energy, 10 ns pulse duration) to generate a high-density plasma. The laser ion source employed a rotating carbon target for continuous operation. Ion beams were extracted from the plasma through a drift space using a direct plasma injection scheme [B. Yu. Sharkov, A. V. Shumshurov, V. P. Dubenkow, O. B. Shamaev, and A. A. Golubev, Rev. Sci. Instrum. 63, 2841 (1992)] up to a maximum voltage of 40 kV. We measured the characteristics of the ion beams from the laser ion source and present the results of experiments here.
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Yoshitama T, Yamaguchi A, Izumihara T, Matsuda T, Nagai S, Niimura T, Tei C. Comparative evaluation of KL-6 and surfactant protein D as serum markers for interstitial pneumonia associated with collagen diseases. Mod Rheumatol 2014; 11:121-6. [DOI: 10.3109/s101650170022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Michikawa C, Uzawa N, Izumo T, Yamaguchi A, Harada K. Classification of extracapsular spread of the lymph node metastasis in oral cancer. Int J Oral Maxillofac Surg 2013. [DOI: 10.1016/j.ijom.2013.07.506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Nozawa K, Fujishiro M, Kawasaki M, Yamaguchi A, Ikeda K, Morimoto S, poh-Sing N, Kato Y, Asano M, Sekigawa I, Takasaki Y. SAT0062 Blockade of connective tissue growth factor (CTGF) ameliorates murine model of rheumatoid arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.3009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Nyuji M, Kitano H, Shimizu A, Lee JM, Kusakabe T, Yamaguchi A, Matsuyama M. Characterization, Localization, and Stage-Dependent Gene Expression of Gonadotropin Receptors in Chub Mackerel (Scomber japonicus) Ovarian Follicles. Biol Reprod 2013; 88:148. [DOI: 10.1095/biolreprod.112.107292] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Yuri K, Yokoi Y, Yamaguchi A, Hori D, Adachi K, Adachi H. Usefulness of fenestrated stent grafts for thoracic aortic aneurysms. Eur J Cardiothorac Surg 2013; 44:760-7. [DOI: 10.1093/ejcts/ezt127] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yamaguchi K, Tsushima K, Kurita N, Fujiwara A, Soeda S, Yamaguchi A, Sugiyama S, Togashi Y, Kono Y, Kasagi S, Setoguchi Y. Clinical characteristics classified by the serum KL-6 level in patients with organizing pneumonia. SARCOIDOSIS, VASCULITIS, AND DIFFUSE LUNG DISEASES : OFFICIAL JOURNAL OF WASOG 2013; 30:43-51. [PMID: 24003534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND The serum Krebs von der Lungen-6 (KL-6) level is a useful marker correlated with the severity of various interstitial lung diseases. There have been few reports about the clinical characteristics of organizing pneumonia (OP) associated with the serum KL-6 levels. OBJECTIVE This study was performed to determine whether the serum KL-6 levels can help determine the optimal treatment for OP. DESIGNS Patients diagnosed with OP by clinical, radiological and histopathological findings were retrospectively reviewed. The OP patients were classified into two groups based on their serum KL-6 levels: normal KL-6 and high KL-6 groups. The two groups were compared with regard to their clinical and radiological data and therapeutic response one month after the start of treatment. RESULTS The clinical records of twenty-two patients diagnosed with OP were reviewed. The serum KL-6 level was elevated in 11 of the 22 patients. There were no obvious differences in the clinical data between the two groups, although patients in the normal KL-6 group tended to have a fever. There were no significant differences in the chest X-ray (CXR) score or computed tomography (CT) score between the two groups. The CXR scores were correlated with the serum KL-6 levels. At 1 month after the diagnosis, 11 patients who needed treatment with prednisolone were included in the high KL-6 group. CONCLUSIONS Patients with normal KL-6 levels showed lower CXR and CT scores. The serum KL-6 level on admission is a useful marker to judge the need for corticosteroid treatment in OP patients.
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Matsumoto T, Iimura T, Ogura K, Moriyama K, Yamaguchi A. The role of osteocytes in bone resorption during orthodontic tooth movement. J Dent Res 2013; 92:340-5. [PMID: 23358677 DOI: 10.1177/0022034513476037] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We investigated the roles of osteocytes in osteoclastic bone resorption during orthodontic tooth movement using the transgenic mice in which osteocytes can be specifically ablated. Because these transgenic mice express the receptor for diphtheria toxin on the cell surfaces of osteocytes, the injection of diphtheria toxin can ablate their osteocytes in vivo. Injection of diphtheria toxin into the transgenic mice significantly increased the number of ablated osteocytes in alveolar bone compared with that in wild-type mice with or without diphtheria toxin injection. Increased numbers of ablated osteocytes were observed from day 4 to day 12 after the injection in alveolar bones as well as in cortical bone of the tibiae. We applied the orthodontic force 4 days after the injection of diphtheria toxin, and the distance of tooth movement on day 12 was significantly smaller in transgenic mice than that in control mice. The numbers of osteoclasts and the quantity of eroded bone surface at the compression site were significantly reduced in the transgenic mice injected with diphtheria toxin than in control mice. These results provide in vivo demonstration of osteocyte involvement in osteoclastic bone resorption during orthodontic tooth movement.
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Ikeda K, Kasugai H, Yamaguchi A, Uchino Y, Katase H, Kanno A. Visual perceptual strengths and weaknesses in adults with intellectual disabilities compared with a birth year-matched norm. JOURNAL OF INTELLECTUAL DISABILITY RESEARCH : JIDR 2013; 57:67-79. [PMID: 22233468 DOI: 10.1111/j.1365-2788.2011.01516.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND The ventral and dorsal streams are considered to be the brain substrates of vision for perception and action, respectively. Using the Developmental Test of Visual Perception (DTVP), the current study examined whether visual perceptual strengths and weaknesses in adults with intellectual disabilities (ID) were attributable to the dichotomy of the visual streams. METHOD In study 1, DTVP performance was compared among mild, moderate and severe adult ID groups; study 2 contrasted adult ID groups with and without Down syndrome (DS). To prevent possible contamination by the Flynn effect, participants were matched by birth year with the norm of the DTVP original edition. RESULTS Independent of the extent of ID among the three groups in study 1 and the aetiological group difference in study 2, relative strength was found for two DTVP tasks: eye-hand coordination and distinguishing target figures from interference background. Relative weakness was obtained in identifying a figural category. Participants with DS demonstrated exceptional weakness in discerning a target from either mirror-imaged or rotated alternatives, in addition to figural-category detection. CONCLUSIONS Visual perceptual strengths and weaknesses in persons with ID were difficult to explain on the basis of two visual streams. An interpretation originating in a different research context (e.g. frontal-lobe dysfunction) appears to be required for explaining visual perceptual weaknesses in persons with ID. For persons with DS, strong frontal-lobe dysfunction with atypical lateralisation might be the pathological determinant of visual perceptual weaknesses.
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Goi T, Yamaguchi A, Takeuchi K, Nakagawa G, Yamashiro S, Furukawa K, Urano T, Shiku H. CD44 with variant exons 8-10 in colorectal tumors. Int J Oncol 2012; 8:657-62. [PMID: 21544409 DOI: 10.3892/ijo.8.4.657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Using a fusion protein encoded by variant exon (v) 8-10 of CD44, a monoclonal antibody (mAb) 44-1V reactive with v9 product was generated. Western immunoblots and reverse transcriptase-polymerase chain reaction/Southern blot revealed that a 130 kilodalton component containing v8-10 products was specifically expressed in colorectal and gastric cancer cell lines. Immunohistological examination of 179 pairs of colorectal cancer and normal tissues revealed that about 47% of cancers expressed the CD44 variant (CD44v8-10), and its expression correlated with hematogenous and lymph node metastasis. These findings suggest the usefulness of CD44v8-10 in the prediction of colorectal cancer metastasis.
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Yamaguchi A, Saitoh M, Goi T, Deguchi M, Takeuchi K, Maehara M, Hirose K, Isobe Y, Nakagawara G, Matsukawa S. Sialyl-lewis-x antigen immunoreaction of colorectal-cancer and its relationship to hematogenous metastasis. Oncol Rep 2012; 1:731-4. [PMID: 21607431 DOI: 10.3892/or.1.4.731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The adhesion of cancer cells to endothelial cells of the target organ is one of the most important steps of hematogenous metastasis. Especially, sialyl Le(X) plays an important role in defining the metastasis. The expression of sialyl Le(X) antigen in colorectal cancer and its usefulness not only as an indicator of metastatic potential but also as a prognostic factor was studied immunohistochemically. Fifty-five (32.4%) sialyl Le(X) antigen-positive tumors were found in 170 colorectal cancers. There was a significant correlation between the expression of sialyl Le(X) antigen and the histological tumor type, venous invasion, lymph node metastasis, as well as liver metastasis. Hematogenous metastases were significantly more frequent in patients with sialyl Le(X)-positive tumor than in those with sialyl Le(X)-negative tumor; and prognosis was significantly poorer in the former. The results suggest that sialyl Le(X) antigen plays a role in hematogenous metastasis of colorectal cancer, and that the expression of sialyl Le(X) is associated with poor prognosis.
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Fushida S, Yonemura Y, Urano T, Yamaguchi A, Miyazaki I, Nakamura T, Shiku H. Expression of hepatocyte growth factor(hgf) and C-met gene in human gastric-cancer cell-lines. Int J Oncol 2012; 3:1067-70. [PMID: 21573474 DOI: 10.3892/ijo.3.6.1067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
It has become evident that the hepatocyte growth factor (HGF) could be involved in the growth of various epithelial cells. In addition, it has recently been elucidated that the c-met gene, a proto-oncogene, encodes the HGF receptor. We examined the expression of HGF and c-met gene in human gastric cancer, using seven gastric cancer cell lines. The Northern blotting method revealed that, among seven cell lines used, only MKN45 expressed the c-met gene at a high efficiency, while the Southern blotting method demonstrated the amplification of the c-met gene. When the expression of HGF gene was studied by the Northern blot method, the expression of this gene was also observed only in MKN45, which was confirmed by immunostaining with polyclonal antibodies to HGF. The above results suggest the possibility that in MKN45, a gastric cancer cell line, the autocrine mechanism by HGF-met might be involved in its growth.
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Seki K, Yamaguchi A, Goi T, Nakagawara G, Matsukawa S, Urano T, Furukawa K. Inhibition of liver metastasis formation by anti-CD44 variant exon 9 monoclonal antibody. Int J Oncol 2012; 11:1257-61. [PMID: 21528332 DOI: 10.3892/ijo.11.6.1257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The overexpression of variants of the glycoprotein CD44 is thought to be associated with the tumorigenesis and progression of human cancers. We examined the role of the variant CD44v8-10 in the metastasis of the human colon cancer cell line HT29 using a monoclonal antibody (mAb 44-1V) reactive with the v9 product. After immunization with mAb 44-1V, the growth of HT29m cells in vitro was not retarded. Six-to 8-week-old mice were divided into 4 groups for liver metastasis assay. All animals in control groups injected with intrasplenic HT29m developed metastases. In contrast, only one of the animals injected with HT29m that reacted with mAb 44-1V developed a metastatic tumor in the liver. The intravenous administration of mAb 44-1V after intrasplenic HT29m injection did not inhibit the formation of liver metastasis. In addition, the adhesiveness of the HT29m cells to the basement membrane matrix was decreased by treatment with the anti-CD44v9 mAb. These findings indicated that a CD44 variant containing the products of variants of exons v8-10 may play an important role in adhesion of tumor cells to the capillaries of distant organs in the metastatic process.
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