76
|
Ogami K, Saiki K, Okamoto K, Wakebe T, Manabe Y, Imamura T, Tsurumoto T. Marked lateral deviation of the phrenic nerve due to variant origin and course of the thyrocervical trunk: a cadaveric study. Surg Radiol Anat 2015; 38:485-8. [PMID: 26438272 PMCID: PMC4850181 DOI: 10.1007/s00276-015-1557-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 09/14/2015] [Indexed: 12/03/2022]
Abstract
Phrenic nerve impairment can often lead to serious respiratory disorders under various pathological conditions. During routine dissection of an 88-year-old Japanese male cadaver, a victim of heart failure, we recognized an extremely rare variation of the right thyrocervical trunk arising from the subclavian artery laterally to the anterior scalene muscle. In addition to that, the ipsilateral phrenic nerve was drawn and displaced remarkably laterad by this vessel. We examined all of the branches arising from subclavian arteries, phrenic nerves and diaphragm muscles. The embryological background of this arterial variation is considered. The marked displacement with prolonged strain had a potential to cause phrenic nerve impairment with an atrophic change of the diaphragm muscle. Recently many image diagnostic technologies have been developed and are often used. However, it is still possible that rare variations like this case may be overlooked and can only be recognized by intimate regional examination while keeping these rare variations in mind.
Collapse
|
77
|
Saitoh M, Endo K, Furuya S, Minami M, Fukasawa A, Imamura T, Miyazawa K. STAT3 integrates cooperative Ras and TGF-β signals that induce Snail expression. Oncogene 2015; 35:1049-57. [PMID: 25961936 DOI: 10.1038/onc.2015.161] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 03/04/2015] [Accepted: 03/20/2015] [Indexed: 01/05/2023]
Abstract
The epithelial-mesenchymal transition (EMT) is a crucial morphological event that occurs during the progression of epithelial tumors. EMT can be induced by transforming growth factor β (TGF-β) in certain kinds of cancer cells through the induction of Snail, a key regulator of EMT. We have previously found that TGF-β remarkably induces Snail expression in cooperation with Ras signals; however, the underlying mechanism of this synergism has not yet been determined. Here, we demonstrate that signal transducer and activator of transcription 3 (STAT3) acts as a mediator that synergizes TGF-β and Ras signals. The overexpression of STAT3 enhanced Snail induction, whereas siRNA-mediated knockdown of STAT3 inhibited it. The STAT3-YF mutant, which has Tyr 705 substituted with Phe, did not enhance Snail induction. Several STAT3 mutants lacking transcriptional activity also failed to enhance it; however, the putative STAT3-binding elements in the Snail promoter regions were not required for STAT3-mediated Snail induction. Protein inhibitor of activated STAT3 (PIAS3) inhibited the enhanced Snail promoter activity induced by TGF-β and Ras. The interaction between PIAS3 and STAT3 was reduced by TGF-β in cells harboring oncogenic Ras, whereas TGF-β promoted the binding of PIAS3 to Smad3, a crucial mediator of TGF-β signaling. Therefore, these findings suggest that STAT3 enhances Snail induction when it is dissociated from PIAS3 by TGF-β in cooperation with Ras signals.
Collapse
|
78
|
Tanaka K, Imamura T. Incidence and clinicopathological significance of DIC in autopsy cases. BIBLIOTHECA HAEMATOLOGICA 2015:79-93. [PMID: 6667256 DOI: 10.1159/000408449] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Disseminated intravascular coagulation (DIC) was examined pathologically in 4906 consecutive autopsy cases during the last 11 years. The cases having pathologically confirmed DIC showing microthrombi in three or more organs were 88. Of the underlying diseases for these cases, malignant tumor was found in 40 cases and diseases of hematopoietic organs in 19. Of the cases with malignant tumor, 11 had gastric cancer, 7 had lung cancer, and 4 had pancreatic cancer. Thirty-three of the 40 cases with malignant tumor showed metastasis in two or more organs. Cases with pathologically confirmed or suspected DIC that had microthrombi in one or more organs were 319. As for the incidence of pathologically suggestive DIC in each disease, the incidence of malignant tumor was 7.3% and that for diseases of the hematopoietic organ was 10.6%. Infection is an important underlying condition, especially gram-negative bacillus septicemia which may play an important role in the development of DIC. An increase in the number of white blood cells appears to be one of the causative conditions of DIC. Kidney is involved most frequently by the deposition of microthrombi, and 27 out of 88 cases show ischemic lesions induced by intravascular coagulation. There were 109 cases having clinically diagnosed or suspected DIC, but 67 cases showed no microthrombus formation. On the other hand, 63 among 4,797 cases with clinically unsuspected DIC revealed microthrombus formation in three or more organs by the postmortem examination.
Collapse
|
79
|
Kato N, Jaarsma T, Okada I, Imamura T, Kagami Y, Endo M, Ono M, Kinugawa K. Quality of Life and Associated Factors in Patients 3 Months After Left Ventricular Assist Device Implantation. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
|
80
|
Imamura T, Kinugawa K, Nitta D, Inaba T, Maki H, Hatano M, Kinoshita O, Nawata K, Ono M. Recipients With Shorter Cardiopulmonary Bypass Time Achieve Improvement of Parasympathetic Reinnervation Within 6 Months After Heart Transplantation. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
|
81
|
Imamura T, Kinugawa K, Inaba T, Maki H, Hatano M, Kinoshita O, Nawata K, Ono M. New Scoring System Using Cardiopulmonary Exercise Parameters Can Predict Prognosis in Heart Failure Patients Receiving Guideline-Directed Optimal Medical Therapy Including Beta-Blocker, Angiotensin Converting Enzyme Inhibitor, and Aldosterone Antagosnit. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
|
82
|
Fujino T, Hatano M, Yao A, Nitta D, Muraoka H, Minatsuki S, Imamura T, Inaba T, Maki H, Kinugawa K, Komuro I. The Reliability of 6-Minute Walk Test to Predict Exercise Capacity in Patients With Pulmonary Hypertension. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
|
83
|
Nishida N, Yang X, Takasaki I, Imai K, Kato K, Inoue Y, Imamura T, Miyashita R, Kato F, Yamaide A, Mori M, Saito S, Hara J, Adachi Y, Miyawaki T, Kanegane H. Dysgammaglobulinemia Associated With Glu349del, a Hypomorphic XIAP Mutation. J Investig Allergol Clin Immunol 2015; 25:205-213. [PMID: 26182687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023] Open
Abstract
BACKGROUND X-linked lymphoproliferative syndrome type 2 is a rare hereditary immunodeficiency caused by mutations in the XIAP gene. This immunodeficiency frequently results in hemophagocytic lymphohistiocytosis, although hypogammaglobulinemia and dysgammaglobulinemia are also common. OBJECTIVE We identified 17 patients from 12 Japanese families with mutations in XIAP. The Glu349del mutation was observed in 3 patients, each from a different family. Interestingly, these patients exhibited dysgammaglobulinemia but not hemophagocytic lymphohistiocytosis. We conducted an immunological study of patients carrying Glu349del and other mutations to elucidate the pathogenic mechanisms of dysgammaglobulinemia in patients with mutations in the XIAP gene. PATIENTS AND METHODS We performed an immunological study of 2 patients carrying the Glu349del mutation and 8 patients with other mutations. RESULTS Flow cytometry showed that the percentage of memory B cells in patients with a mutation in XIAP was lower than that observed in the healthy controls. The patients with the Glu349del mutation had a lower percentage of memory B cells than those with other mutations. Ig production was reduced in patients with the Glu349del mutation. Increased susceptibility to apoptosis was observed in the patients with other mutations. Susceptibility to apoptosis was normal in patients with Glu349del. Microarray analysis indicated that expression of Ig-related genes was reduced in patients with the Glu349del mutation and that the pattern was different from that observed in the healthy controls or patients with other mutations in XIAP. CONCLUSIONS Patients carrying the Glu349del mutation in the XIAP gene may have a clinically and immunologically distinct phenotype from patients with other XIAP mutations. The Glu349del mutation may be associated with dysgammaglobulinemia.
Collapse
|
84
|
Akahane M, Ueha T, Shimizu T, Shigematsu H, Kido A, Omokawa S, Kawate K, Imamura T, Tanaka Y. Cell sheet injection as a technique of osteogenic supply. Int J Stem Cells 2014; 3:138-43. [PMID: 24855551 DOI: 10.15283/ijsc.2010.3.2.138] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/20/2010] [Indexed: 12/26/2022] Open
Abstract
We previously reported a new cell transplantation method utilizing injections of mesenchymal stem cell (MSC) sheets that have osteogenic potential. After subcutaneous transplantation without any scaffold, the sheet demonstrated in vivo bone formation. In the present study, we transplanted such sheets by injection into implanted ceramics and assessed whether the injectable MSC sheets could stimulate osteogenic integration of the ceramics. To fabricate MSC sheets, bone marrow cells cultured from femur shafts of 7-week-old rats were subcultured in regular 10-cm dishes containing dexamethasone and ascorbic acid phosphate until confluent. Each cell sheet was then lifted using a scraper. Porous β-tricalcium phosphate (β-TCP) disks (5 mm Φ×2 mm) were transplanted subcutaneously into the backs of the rats. Immediately following implantation, the sheets were injected around the disks via a 16G needle (immediate group). Cell sheets were also injected into the remaining implanted disks 1 week after disk implantation (1-wk group). Four weeks following sheet injection, radiography and histology revealed calcification and bone tissue around the harvested disks of the immediate group (eight disks exhibited bone formation/eight implanted disks), whereas calcification and bone tissue were observed in 50% of the samples in the 1-wk group (four disks exhibited bone formation/eight implanted disks). The present study indicates that injected cell sheets can supply osteogenic potential to implanted ceramics. Owing to the usage of a needle for cell sheet transplantation, such an injection method can be applied as a minimally invasive technique of osteogenic supply to implanted ceramics.
Collapse
|
85
|
Maki H, Hatano M, Muraoka H, Minatsuki S, Fujino T, Imamura T, Inaba T, Yao A, Kinugawa K, Komuro I. Pulmonary Vasodilators Can Reverse Out-of-Proportional Pulmonary Hypertension in Patients with Left Cardiac Disease. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
86
|
Imamura T, Kinugawa K, Hatano M, Muraoka H, Fujino T, Inaba T, Maki H, Kinoshita O, Nawata K, Kyo S, Ono M. Low Cardiac Output Stimulates Vasopressin Release in Patients with Stage D Heart Failure - Its Relevance to Poor Prognosis and Reversal by Surgical Treatment. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
87
|
Imamura T, Tsuburaya K. Absence of neurobehavioral disturbance in a focal lesion of the left paracentral lobule. Behav Neurol 2014; 5:189-91. [PMID: 24487745 DOI: 10.3233/ben-1992-5308] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The case of a right-handed woman with an infarcation confined to the left paracentral lobule and sparing the supplementary motor area (SMA) is reported. She presented with a right leg monoplegia and displayed no mutism. The absence of any associated neurobehavioral disturbances (mutism, forced grasping, reduced spontaneous arm activity or aphasia raises the possibility that the left SMA has discrete neurobehavioral functions.
Collapse
|
88
|
Imamura T, Yamadori A, Shiga Y, Sahara M, Abiko H. Is disturbed transfer of learning in callosal agenesis due to a disconnection syndrome? Behav Neurol 2014; 7:43-8. [PMID: 24487287 DOI: 10.3233/ben-1994-7201] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Disturbed intermanual transfer of tactile learning in callosal agenesis has been interpreted as a sign of disconnection syndrome. We observed this sign in one of four acallosal patients with a conventional form-board task, and tried to elucidate the nature of the deficit. The form-board performance of the patient with disturbed transfer of learning totally depended on motor skill, while the other acallosals and normal controls executed the task based on spatial and somesthetic information. All acallosals and normals, however, failed to show transfer of learning with another tactile task which needed motor skill but not spatial-somesthetic information. These findings suggest that the task-performing strategies in form-board learning change the state of interhemispheric transfer. Unimanual learning effect is transferred if spatial-somesthetic information is acquired in the process of learning, but is not transferred if motor skill is the exclusive content of learning. We conclude that disturbed "transfer" of learning in some acallosals is not a true disconnection sign. It should be attributed to a lack of appropriate strategy, as a result of ineffective problem solving in tactile tasks.
Collapse
|
89
|
Yoshida H, Miyachi M, Sakamoto K, Ouchi K, Yagyu S, Kikuchi K, Kuwahara Y, Tsuchiya K, Imamura T, Iehara T, Kakazu N, Hojo H, Hosoi H. PAX3-NCOA2 fusion gene has a dual role in promoting the proliferation and inhibiting the myogenic differentiation of rhabdomyosarcoma cells. Oncogene 2013; 33:5601-8. [DOI: 10.1038/onc.2013.491] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 09/20/2013] [Indexed: 11/10/2022]
|
90
|
Matsuda C, Miyake K, Imamura T, Araki N, Nishino I, Hayashi Y. P.5.1 Sarcolemmal repair and reorganization of microtubule. Neuromuscul Disord 2013. [DOI: 10.1016/j.nmd.2013.06.453] [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]
|
91
|
Kinugawa K, Imamura T, Komuro I. Experience of a vasopressin receptor antagonist, tolvaptan, under the unique indication in Japanese heart failure patients. Clin Pharmacol Ther 2013; 94:449-51. [PMID: 23872863 DOI: 10.1038/clpt.2013.147] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Accepted: 07/10/2013] [Indexed: 11/09/2022]
|
92
|
Maki H, Hatano M, Yao A, Imamura T, Inaba T, Shiga T, Kinugawa K, Nagai R. THU0248 Efficacy of imatinib mesylate on scleroderma associated pulmonary arterial hypertension. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2213] [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]
|
93
|
Kato N, Kinugawa K, Endo M, Kagami Y, Imamura T, Muraoka H, Minatsuki S, Inaba T, Maki H, Shiga T, Hatano M, Yao A, Kyo S, Komuro I, Ono M. Differential Impacts of Implantable Ventricular Assist Device on Quality of Life and Depression in Patients with Heart Failure and Their Caregivers. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
|
94
|
Iinuma H, Tamura J, Omoto D, Kamo N, Ohnaka S, Mitoma Y, Miyazawa Y, Okinaga K, Imamura T, Fukushima R, Watanabe T, Ikeda T. Accurate and rapid novel genetic diagnosis for detection of sentinel lymph node metastasis in breast cancer patients. Br J Cancer 2012; 107:724-31. [PMID: 22782345 PMCID: PMC3419953 DOI: 10.1038/bjc.2012.300] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Background: The transcription-reverse transcription concerted reaction (TRC) test is a novel molecular-based procedure, which can assess nodal metastasis accurately and quickly. We examined the usefulness of the TRC test with a double marker, cytokeratin 19 (CK19) and carcinoembryonic antigen (CEA) mRNA, to detect sentinel lymph nodes (SLN) metastasis in breast cancer patients. Methods: A total of 264 SLNs from 131 breast cancer patients were assigned to a training set (109 SLNs from 50 patients) and validation set (155 SLNs from 81 patients). Cytokeratin 19 and CEA mRNA were detected by TRC tests, and the sensitivity and specificity of the SLN metastasis between the TRC and histology cohorts were compared. Results: Mean copy numbers of CK19 and CEA by TRC tests were increased according to the metastatic size. In the training set, TRC test showed 100% sensitivity, specificity and concordance rates against the permanent histopathology test. In the validation set, sensitivity was 97.1%, specificity was 99.2% and the concordance rate was 99.4%. Conclusion: Our results showed that the detection of CK19 and CEA mRNA using the TRC test is, an accurate and rapid method for detection of SLN metastasis and can be applied as an intraoperative molecular diagnosis in breast cancer patients.
Collapse
|
95
|
Asai D, Osone S, Imamura T, Sakaguchi H, Nishio N, Kuroda H, Kojima S, Hosoi H. Response to the article by Linnankivi et al., entitled 'Cerebroretinal microangiopathy with calcifications and cyst, Revesz syndrome and aplastic anemia'. Bone Marrow Transplant 2012; 48:154. [PMID: 22705803 DOI: 10.1038/bmt.2012.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
96
|
Maki H, Hatano M, Yao A, Imamura T, Asada K, Inaba T, Shiga T, Kinugawa K, Nagai R. 615 Efficacy of Imatinib Mesylate on Scleroderma Associated Pulmonary Arterial Hypertension. J Heart Lung Transplant 2012. [DOI: 10.1016/j.healun.2012.01.629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
|
97
|
Ito I, Nishida M, Morioka S, Nozaki T, Imamura T, Morimoto A, Akioka S, Sugimoto T, Hamaoka K, Hosoi H. A case of steroid-resistant nephrotic syndrome associated with systemic lupus erythematosus. Lupus 2011; 23:703-6. [DOI: 10.1177/0961203311432740] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Accepted: 11/10/2011] [Indexed: 11/16/2022]
Abstract
We report on an 11-year-old girl who developed steroid-resistant nephrotic syndrome (NS) at the onset of systemic lupus erythematosus (SLE), and clinical and renal histological findings suggested that her NS would be associated with SLE-related podocytopathy. Although initial treatment with intravenous pulse methylprednisolone was ineffective, following treatment with cyclosporine and an angiotensin receptor blocker was effective for her nephrotic proteinuria. She had developed posterior reversible encephalopathy syndrome (PRES), and mycophenolate mofetil (MMF) was started instead of cyclosporine. At present, 45 months after the onset, she is in remission of both NS and SLE. This case indicates that NS associated with SLE-related podocytopathy should be included in the spectrum of glomerulopathy accompanying SLE, also in the pediatric population.
Collapse
|
98
|
Ikeda T, Kamo N, Shiga C, Sasajima Y, Imamura T. 5164 POSTER Phase II Study of Neoadjuvant S-1 Combined With Paclitaxel Followed by FEC in Patients With Breast Cancer. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)71606-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
99
|
Hiramatsu R, Hoshino J, Imamura T, Hasegawa E, Yamanouchi M, Hayami N, Sumida K, Sawa N, Suwabe T, Ubara Y, Takaichi K. Acute obstructive suppurative cholangitis as a cause of acute kidney injury and rhabdomyolysis. Intern Med J 2011; 41:506-9. [DOI: 10.1111/j.1445-5994.2011.02509.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
100
|
Li Z, Yamada S, Inenaga S, Imamura T, Wu Y, Wang KY, Shimajiri S, Nakano R, Izumi H, Kohno K, Sasaguri Y. Polypeptide N-acetylgalactosaminyltransferase 6 expression in pancreatic cancer is an independent prognostic factor indicating better overall survival. Br J Cancer 2011; 104:1882-9. [PMID: 21587259 PMCID: PMC3111199 DOI: 10.1038/bjc.2011.166] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Revised: 04/14/2011] [Accepted: 04/17/2011] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND The family of polypeptide N-acetylgalactosaminyltransferases (GalNAc-Ts) is responsible for the altered glycosylation in cancer. The purpose of our study was to investigate the clinical significance of two isoforms, GalNAc-T6 and -T3, and their correlation with the prognosis of pancreatic cancer. METHODS Immunohistochemistry was used to analyse GalNAc-T6 and -T3 expressions in 70 clinicopathologically characterised pancreatic cancer cases. RESULTS Positive expressions of GalNAc-T6 and -T3 were immunohistochemically identified in 51% (36 of 70) and in 77% (54 of 70) of patients, respectively. A close relationship was noted between GalNAc-T6 positive expression and pathological well/moderate differentiated type (P=0.001), small tumour size (P=0.044), absence of vascular invasion (P=0.009), and low stage of the American Joint Committee on Cancer systems (P=0.043). The expression of GalNAc-T3 significantly correlated with good differentiation (P=0.001), but not with other clinicopathologic features. Furthermore, univariate and multivariate analyses revealed that GalNAc-T6 expression was an independent prognosis indicator for the disease, whereas GalNAc-T3 expression had no impact on clinical outcome, even though 33 of 36 GalNAc-T6-positive cases also had a positive expression of GalNAc-T3 (P=0.001, r=0.356). CONCLUSION Both GalNAc-T6 and -T3 expressions correlated significantly with tumour differentiation, whereas only GalNAc-T6 expression predicted prognosis in pancreatic cancer.
Collapse
|