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Salem M, Kinoshita Y, Tajiri T, Souzaki R, Tatsuta K, Higashi M, Izaki T, Kohashi K, Tsuneyoshi M, Taguchi T. Association between the HER2 expression and histological differentiation in Wilms tumor. Pediatr Surg Int 2006; 22:891-6. [PMID: 16932912 DOI: 10.1007/s00383-006-1762-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Human epidermal growth factor receptors (HER) play a critical role in the branching morphogenesis of renal tubules. In the current study, we analyzed the expression of HER2 in Wilms tumor and assessed the role of this gene in the tumorgenesis of Wilms tumor. During the period from 1960 to 2005, 40 patients with Wilms tumor were treated in our department. Twenty-four of those patients (except those with clear cell sarcoma of the kidney and malignant rhabdoid tumor of the kidney) were collected and assessed. The histological component of each Wilms tumor was divided into three categories (epithelial, blastemal, and mesenchymal) and the extent of HER2 protein expression was analyzed immunohistochemically. The normal kidney tissue accompanied with 12 cases of Wilms tumor was also examined. In the normal kidney, HER2 showed a strong immunoreactivity in the cell membranes of the collecting tubules and in the endothelial cells. Of 24 cases, 15 cases showed an epithelial component, while 24 cases had a blastemal component and 21 cases had a mesenchymal component, respectively. Among the 15 specimens with epithelial cell differentiation, eight (53.3%) showed HER2 immunoreactive epithelial cells. HER2 immunoreactive blastemal cells were present in 11 (45.8%) of 24 specimens with blastemal cells. On the other hand, only 3 (14.3%) of 21 specimens containing mesenchymal cells showed HER2 immunoreactivity. These results suggest that the extent of HER2 expression is associated with epithelial differentiation in Wilms tumor. These histological findings may therefore help to explain the development of Wilms tumor from the standpoint of histological differentiation.
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Ohtsuka Y, Higashi M, Nishikawa M. Fundamental experiment for inspection of cooling pipes in operation by using ultrasonic technique. FUSION ENGINEERING AND DESIGN 2006. [DOI: 10.1016/j.fusengdes.2005.09.044] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ramli MN, Higashi M, Imura Y, Takayama K, Nakanishi Y. Growth, Feed Efficiency, Behaviour, Carcass Characteristics and Meat Quality of Goats Fed Fermented Bagasse Feed. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2005. [DOI: 10.5713/ajas.2005.1594] [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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Akata T, Kanna T, Yoshino J, Higashi M, Fukui K, Takahashi S. Reliability of fingertip skin-surface temperature and its related thermal measures as indices of peripheral perfusion in the clinical setting of the operating theatre. Anaesth Intensive Care 2005; 32:519-29. [PMID: 15675212 DOI: 10.1177/0310057x0403200409] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
During the perioperative period, evaluation of digital blood flow would be useful in early detection of decreased circulating volume, thermoregulatory responses or anaphylactoid reactions, and assessment of the effects of vasoactive agents. This study was designed to assess the reliability of fingertip temperature, core-fingertip temperature gradients and fingertip-forearm temperature gradients as indices of fingertip blood flow in the clinical setting of the operating theatre. In 22 adult patients undergoing abdominal surgery with general anaesthesia, fingertip skin-surface temperature, forearm skin-surface temperature, and nasopharyngeal temperature were measured every five minutes during the surgery. Fingertip skin-surface blood flow was simultaneously estimated using laser Doppler flowmetry. These measurements were made in the same upper limb with an IV catheter (+ IV group, n=11) or without an IV catheter (-IV group, n=11). Fingertip blood flow, transformed to a logarithmic scale, significantly correlated with any of the three thermal measures in both the groups. Their rank order as an index of fingertip blood flow in the -IV group was forearm-fingertip temperature gradient (r=-0.86) > fingertip temperature (r=0.83) > nasopharyngeal-fingertip temperature gradient (r=-0.82), while that in the +IV group was nasopharyngeal-fingertip temperature gradient (r=-0.77) > fingertip temperature (r=0.71) > forearm-fingertip temperature gradient (r=-0.66). The relation of fingertip blood flow to each thermal measure in the -IV/group was stronger (P<0.05) than that in the +IV group. In the clinical setting of the operating theatre, using the upper limb without IV catheters, fingertip skin-surface temperature, nasopharyngeal-fingertip temperature gradients, and forearm-fingertip temperature gradients are almost equally reliable measures of fingertip skin-surface blood flow.
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Komamura K, Higashi M, Yamada N. Improvement of cardiac hypertrophy and ventricular function in a man with Fabry disease by treatment with recombinant alpha-galactosidase A. BRITISH HEART JOURNAL 2004; 90:617. [PMID: 15145857 PMCID: PMC1768247 DOI: 10.1136/hrt.2003.023903] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Okamura H, Bando K, Higashi M. Huge mass bordering on left atrium raises coronary artery. Heart 2003; 89:138. [PMID: 12527659 PMCID: PMC1767546 DOI: 10.1136/heart.89.2.138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Oku S, Higashi M, Imazono Y, Sueyoshi K, Enokida H, Kubo H, Yonezawa S, Shirahama T. Overexpression of cyclooxygenase-2 in high-grade human transitional cell carcinoma of the upper urinary tract. BJU Int 2003; 91:109-14. [PMID: 12614262 DOI: 10.1046/j.1464-410x.2003.03057.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To examine cyclooxygenase (COX)-2 expression (a key enzyme in the synthesis of prostaglandins, and involved in carcinogenesis of human epithelial tumours) in human transitional cell carcinomas (TCCs) of the renal pelvis and ureter, and to determine whether COX-2 expression correlates with the clinicopathological characteristics of the disease. MATERIALS AND METHODS Specimens from 144 patients with TCC of the upper urinary tract who had undergone nephroureterectomy were analysed immunohistochemically, and 23 were also analysed by immunoblotting. RESULTS Immunoblot analysis showed COX-2 immunoreactivity in 17 (74%) of 23 tumours, but not in normal transitional epithelium. COX-2 was localized to the cytoplasm of cancer cells and expressed in 108 (75%) of 144 tumours, as assessed by immunohistochemical analysis. COX-2 expression correlated with tumour grade (P < 0.008), being detected in one of nine grade 1, 77 (79%) of 97 grade 2 and 30 (79%) of 38 grade 3 tumours. Other variables including tumour stage were not associated with COX-2 expression. CONCLUSIONS We show for the first time that COX-2 is frequently expressed in TCC of the upper urinary tract and is associated with the degree of tumour cell differentiation, indicating that COX-2 may be involved in TCC carcinogenesis at an early and/or late stage, and could be a useful target for chemoprevention of this type of cancer.
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Hattori T, Higashi M, Hiroki J, Mukai Y, Shimokawa H. 4P-1082 Long-term inhibition of Rho-kinase suppresses cardiac allograft vasculopathy in mice — Possible involvement of macrophage migration inhibitory factor (MIF). ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)91338-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hiroki J, Higashi M, Kandabashi T, Mukai Y, Hattori T, Ichiki T, Shimokawa H. 3P-0675 Inflammatory stimuli upregulate Rho-kinase in human coronary vascular smooth muscle cells — Divergent effects of estrogen and nicotine. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90894-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Higashi M, Shimokawa H. 1P-0263 Long-term inhibition of Rho-kinase suppresses angiotensin II-induced formation of cardiovascular lesions in rats in vivo: Effect on endothelial NAD(P)H oxidase system. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90334-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Fukumaru S, Horiuchi M, Kobayashi K, Jalil MA, Iijima M, Masuda M, Begum L, Higashi M, Wakana S, Kanzaki T, Saheki T. Novel mRNA molecules are induced in hypertrophied ventricles of carnitine-deficient mice and belong to a family of up-regulated gene in cells overexpressing c-erbB-2. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1577:437-44. [PMID: 12359334 DOI: 10.1016/s0167-4781(02)00447-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
To clarify the pathogenesis of cardiac hypertrophy in carnitine-deficient juvenile visceral steatosis (JVS) mice, we performed differential mRNA display analysis with the ventricles of control and JVS mice. We found a novel up-regulated gene, designated as carnitine deficiency-associated gene expressed in ventricle (CDV)-3. Northern blot analysis with a cDNA probe derived from the novel gene revealed two substantial mRNA species of prominent 4.1- and faint 3.5-kb in examined tissues of control and JVS mice. In spite of their widely expressed features, up-regulation of the gene was found predominantly in the ventricles and slightly in the auricles and skeletal muscles of JVS mice. The up-regulation of CDV-3 gene in the ventricles of JVS mice was significantly relieved by carnitine administration within 6 h. The entire cDNA nucleotide sequences showed that two kinds of cDNA, long and short versions (CDV-3A and -3B), corresponding to the detected mRNAs, are different in a 711 base fragment. Analysis of genomic DNA revealed that the two mRNAs were derived from a single CDV-3 gene with five exons by alternative splicing. The deduced amino acid sequences indicated that the isoforms consist of 236 and 281 residues, differing at regions near the carboxy-terminus but sharing 231 residues of the amino-terminal regions. A BLAST search revealed that they show a high similarity to a human predicted nuclear protein (H41), which has been reported to be up-regulated in breast cancer cells overexpressing cellular-erythroblastosis B-2 (c-erbB-2, a kind of tyrosine kinase).We report the identification and characterization of novel transcripts that may be involved in the development of cardiac hypertrophy caused by carnitine deficiency.
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Wang F, Goto M, Kim YS, Higashi M, Imai K, Sato E, Yonezawa S. Altered GalNAc-alpha-2,6-sialylation compartments for mucin-associated sialyl-Tn antigen in colorectal adenoma and adenocarcinoma. J Histochem Cytochem 2001; 49:1581-92. [PMID: 11724906 DOI: 10.1177/002215540104901212] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Sialyl-Tn (STn), a mucin-associated disaccharide antigen carried by apomucins such as MUC2, plays an important role in tumor biology. However, little is known about the subcellular localization and compartments involved in STn synthesis. In this study we used immunoelectron microscopy to localize STn and MUC2 apomucin in human colorectal tissues. MUC2 apomucin was localized predominantly in the rough endoplasmic reticulum (RER) in normal colorectal mucosa (n=6), colorectal adenoma (n=8), and colorectal adenocarcinoma (n=10). STn, recognized by monoclonal antibody TKH2, was not readily detectable in normal colorectal mucosa but becomes manifest in both trans-Golgi apparatus and mucin droplets in colorectal adenoma. In colorectal adenocarcinoma, STn was localized not only in late but also in early Golgi compartments, and particularly in some RER lumens. Furthermore, electron microscopic in situ hybridization revealed that gold particles representing MUC2 mRNA are primarily localized over the RER. Our findings indicate that in colorectal adenoma STn sialylation takes place in the trans-Golgi apparatus, whereas in colorectal cancer STn sialylation occurs in all the Golgi compartments and in the RER.
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Yamaguchi Y, Higashi M, Matsuno T, Kawashima S. Ameliorative effects of azaindolizinone derivative ZSET845 on scopolamine-induced deficits in passive avoidance and radial-arm maze learning in the rat. JAPANESE JOURNAL OF PHARMACOLOGY 2001; 87:240-4. [PMID: 11885975 DOI: 10.1254/jjp.87.240] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Effects of ZSET845 (3,3-dibenzylimidazo[1,2-a]pyridin-2-(3H)-one), a newly synthesized cognitive enhancer, and donepezil and tacrine on the scopolamine-induced cognitive deficits in rats were examined in passive avoidance and radial-arm maze tasks. ZSET845 (0.01 mg/kg) showed a greater ameliorative effect than donepezil (0.1 mg/kg) or tacrine (1 mg/kg) in the passive avoidance task. In the radial-arm maze task, ZSET845 (0.1 mg/kg) also showed a greater effect than donepezil (10 mg/kg) or tacrine (10 mg/kg). ZSET845 induced an increase in the choline acetyltransferase (ChAT) activity in the hippocampus, suggesting that the ameliorative effects of ZSET845 are related to the increase in the ChAT activity in the hippocampus.
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Ramsey SD, Clarke L, Etzioni R, Higashi M, Berry K, Urban N. Cost-effectiveness of microsatellite instability screening as a method for detecting hereditary nonpolyposis colorectal cancer. Ann Intern Med 2001; 135:577-88. [PMID: 11601929 DOI: 10.7326/0003-4819-135-8_part_1-200110160-00008] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND The National Cancer Institute has published consensus guidelines for universal screening for hereditary nonpolyposis colorectal cancer (HNPCC) in patients with newly diagnosed colorectal cancer. OBJECTIVE To determine the cost-effectiveness of screening compared with standard care in eligible patients with colorectal cancer and their siblings and children. DESIGN Cost-effectiveness analysis. DATA SOURCES National colorectal cancer registry data, the Creighton International Hereditary Colorectal Cancer Registry, Medicare claims records, and published literature. TARGET POPULATION Patients with newly diagnosed colorectal cancer and their siblings and children. TIME HORIZON Lifetime (varies depending on age at screening). PERSPECTIVE Societal. INTERVENTIONS Initial office-based screening to determine eligibility (based on personal and family cancer history), followed by tumor testing for microsatellite instability. Those with microsatellite instability were offered genetic testing for HNPCC. Siblings and children of patients with cancer and the HNPCC mutation were offered genetic testing, and those who were found to carry the mutation received lifelong colorectal cancer screening. MEASUREMENTS Life-years gained. RESULTS OF BASE-CASE ANALYSIS When only the patients with cancer were considered, cost-effectiveness of screening was $42 210 per life-year gained. When patients with cancer and their siblings and children were considered together, cost-effectiveness increased to $7556 per life-year gained. RESULTS OF SENSITIVITY ANALYSIS The model was most sensitive to the estimated survival gain from screening siblings and children, to the prevalence of HNPCC mutations among patients with newly diagnosed cancer, and to the discount rate. In probabilistic analysis, the 90% CI for the cost-effectiveness of screening patients with cancer plus their relatives was $4874 to $21 576 per life-year gained. CONCLUSION Screening patients with newly diagnosed colorectal cancer for HNPCC is cost-effective, especially if the benefits to their immediate relatives are considered.
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Nakamura Y, Shimokawa S, Watanabe S, Sakasegawa K, Sakata R, Higashi M, Miyahara K. [A case of diffuse alveolar hemorrhage developing after open heart surgery]. KYOBU GEKA. THE JAPANESE JOURNAL OF THORACIC SURGERY 2001; 54:892-4. [PMID: 11554085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
A 47-year-old man was receiving anticoagulant therapy after coronary artery bypass grafting and mitral valve plasty. A chest roentgenogram disclosed alveolar infiltrates throughout both lung fields 6 months postoperatively. Lung biopsy specimens showed the presence of hemosiderin-laden macrophages in the alveolar spaces, establishing a diagnosis of diffuse alveolar hemorrhage. Anticoagulant therapy may have caused the hemorrhage, because the patient had no immunologic disorder or renal disease. The shadows completely disappeared after steroid therapy and discontinuation of anticoagulant therapy. Diffuse alveolar hemorrhage should be considered, when extensive infiltrates develop on chest roentgenogram in patients receiving anticoagulant therapy after open heart surgery. Lung biopsy is essential, when a bronchoalveolar lavage fails to diagnose the disease.
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Takeuchi T, Mukawa T, Matsui J, Higashi M, Shimizu KD. Moleculary imprinted polymers with metalloporphyrin-based molecular recognition sites coassembled with methacrylic acid. Anal Chem 2001; 73:3869-74. [PMID: 11534709 DOI: 10.1021/ac010278p] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A diastereoselective molecularly imprinted polymer (MIP) for (-)-cinchonidine, PPM(CD), was prepared by the combined use of methacrylic acid and vinyl-substituted zinc(II) porphyrin as functional monomers. Compared to MIPs using only methacrylic acid or zinc porphyrin as a functional monomer, PM(CD) and PP(CD), respectively, PPM(CD) showed higher binding ability for (-)-cinchonidine in chromatographic tests using the MIP-packed columns. Scatchard analysis gave a higher association constant of PPM(CD) for (-)-cinchonidine (1.14 x 10(7) M(-1)) than those of PP(CD) (1.45 x 10(6) M(-1)) and PM(CD) (6.78 x 10(6) M(-1)). The affinity distribution of binding sites estimated by affinity spectrum analysis showed a higher percentage of high-affinity sites and a lower percentage of low-affinity sites in PPM(CD). The MIPs containing a zinc(II) porphyrin in the binding sites, PPM(CD) and PP(CD), showed fluorescence quenching according to the binding of (-)-cinchonidine, and the quenching was significant in the low-concentration range, suggesting that the high-affinity binding sites contain the porphyrin residue. The correlation of the relative fluorescence intensity against log of (-)-cinchonidine concentrations showed a linear relationship. These results revealed that the MIP having highly specific binding sites was assembled by the two functional monomers, vinyl-substituted zinc(II) porphyrin and methacrylic acid, and they cooperatively worked to yield the specific binding. In addition, the zinc(II) porphyrin-based MIPs appeared to act as fluorescence sensor selectively responded by binding events of the template molecule.
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Abstract
We report a novel mechanism for species coexistence that does not invoke a trade-off relationship in the case of outbreeding flowering plants. Competition for pollination services may lead to interspecific segregation of the timing of flowering among plants. This, in turn, sets limits on the pollination services, which restrain the population growth of a competitively superior species, thereby allowing an inferior species to sustain its population in the habitat. This explains the often-observed tendency for interspecific differentiation in the timing of flowering between coexisting plants. It also predicts that the introduction of an efficient pollinator to a habitat may cause the extinction of competitively inferior plant species.
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Hidaka K, Watanabe Y, Tomita M, Ueda N, Higashi M, Minatogawa Y, Iuchi I. Gene analysis of genomic DNA from stored serum by polymerase chain reaction: identification of three missense mutations in patients with cholinesterasemia and ABO genotyping. Clin Chim Acta 2001; 303:61-7. [PMID: 11163024 DOI: 10.1016/s0009-8981(00)00375-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
We established a method to determine the butyrylcholinesterase genotype associated with a BCHE deficiency directly using multiple PCR from stored serum, which was stored at -70 degrees C for more than 30 years. PCR products from sera of six propositi were used for DNA sequence analysis. All of these BChE variants were characterized by a single nucleotide substitution. Four of them were homozygotes and demonstrated a C-->T single nucleotide point mutation at codon 100 from CCA (Pro) to TCA (Ser). The fifth case was a heterozygote of this mutation. The remaining one was a compound heterozygote showing a T-->C transition mutation at codon 203 from TCA (Ser) to CCA (Pro) and a G-->C transversion mutation at codon 365 from GGA (Gly) to CGA (Arg). Furthermore we developed a method to determine the ABO genotype from the same serum. These results indicated that serum is useful as a starting material for amplification of genomic DNA when fresh blood samples are not available.
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Higashi M, Kobayashi K, Iijima M, Wakana S, Horiuchi M, Yasuda T, Yoshida G, Kanmura Y, Saheki T. Genomic organization and mapping of mouse CDV (carnitine deficiency-associated gene expressed in ventricle)-1 and its related CDV-1R gene. Mamm Genome 2000; 11:1053-7. [PMID: 11130971 DOI: 10.1007/s003350010207] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
We have previously reported that CDV (carnitine deficiency-associated gene expressed in ventricle)-1 was a downregulated gene in the hypertrophied ventricle of carnitine-deficient juvenile visceral steatosis mice and that the related gene (CDV-1R) showed no tissue specificity and no sensitivity to carnitine deficiency. In the present paper, the CDV-1/1R gene was isolated from a mouse genomic BAC library, and the genomic structure was characterized. We found that the CDV-1/1R gene consisted of at least 19 exons and encompassed approximately 48 kb. The splice sites conformed to the GT-AG rule, and the CDV-1R mRNA containing 19 exons was processed. CDV-1 mRNA containing 5 exons was constructed from the 3' half of CDV-1R. The first exon of CDV-1 consisted of the 3' side (116 bp) of intron 14 and exon 15 (87 bp) of CDV-1R. The presumed promoter sequence for CDV-1 located in the intron 14 of CDV-1R contained the common TATA box and consensus binding sites for various transcription factors (Nkx-2.5, Spl, C/EBP, SRF, YY1, and CREB), which seem to play roles in the heart-specific expression and carnitine deficiency-associated suppression of CDV-1. In the upstream region of the CDV-1 promoter, we found two VNTRs, 13 repeats of GATA1, and 16 copies of STRE involved in yeast stress response. The CDV-1/1R gene was located close to DSMIT68 on mouse Chromosome (Chr) 5, corresponding to human Chr 12q24. All these data revealed that two mRNA species, CDV-1 and CDV-1R, are expressed tissue-specifically by using promoters peculiar to each transcript in a single gene.
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Takimoto G, Higashi M, Yamamura N. A deterministic genetic model for sympatric speciation by sexual selection. Evolution 2000; 54:1870-81. [PMID: 11209767 DOI: 10.1111/j.0014-3820.2000.tb01234.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A deterministic haploid genetic model confirms and explores in more detail the results of our previous individual-based simulation model for sympatric speciation by sexual selection. With the deterministic model, we are able to elucidate parameter dependence by phase plane analysis. We clarify how and why sympatric speciation by sexual selection can happen in a number of ways: (1) Female preferences for or against particular types of males have different effects. Whereas the former affects how readily speciation is invoked, the latter changes the stability of speciation equilibrium. (2) When there is no cost on male ornamentations, speciation is triggered regardless of initial haplotype frequencies if sufficient female preference is provided. (3) There exists a threshold for female initial frequencies for speciation to be invoked, but male initial frequencies have little effect. (4) A small cost on female mate choice does not cancel speciation, but when large, it greatly reduces the possibility of speciation.
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Yamaura K, Higashi M, Akiyoshi K, Itonaga Y, Inoue H, Takahashi S. Pulmonary lipiodol embolism during transcatheter arterial chemoembolization for hepatoblastoma under general anaesthesia. Eur J Anaesthesiol 2000; 17:704-8. [PMID: 11029570 DOI: 10.1046/j.1365-2346.2000.00759.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We present a case of pulmonary embolism that occurred during the injection of lipiodol during transcatheter arterial chemoembolization under general anaesthesia. A 7-year-old child suffering from a large hepatoblastoma was admitted for arterial chemoembolization and carcinostatic administration. Pulmonary embolism due to lipiodol during arterial chemoembolization was evident by a sudden fall in oxyhaemoglobin saturation from 100 to 90%. This was associated with a spread of lipiodol into both lungs, particularly the middle lung zones and detected by chest fluoroscopy. Arterial blood gases returned to normal values 1 day later but pulmonary infiltration persisted for 7 days before final clearance. Pulmonary embolism caused by lipiodol during arterial chemoembolization is infrequent, but such a complication could prove fatal. Understanding the risk of pulmonary embolism in patients receiving lipiodol, during and after arterial chemoembolization, and late onset pulmonary injury is important and a close follow-up for several days after arterial chemoembolization is advisable.
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Kubo M, Takao S, Shinchi H, Uchikura K, Higashi M, Yonezawa S, Aikou T. Spindle cell carcinoma of the pancreas. JOURNAL OF HEPATO-BILIARY-PANCREATIC SURGERY 2000; 7:236-41. [PMID: 10982621 DOI: 10.1007/s005340050183] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
We experienced a rare case of spindle cell carcinoma of the pancreas. The patient was a 74-year-old man who complained of abdominal pain and loss of weight. Ultrasonographic scans revealed a hypoechoic solid mass in the head of the pancreas, 4 cm in diameter, with a high echoic spot suggestive of central necrosis or hemorrhage. The mass was hypodense on enhanced computed tomographic scans and hypovascular on angiograms. At laparotomy, the tumor had invaded to the mesocolon, but dissemination and distant metastasis were not found. We therefore performed pylorus-preserving pancreatoduodenectomy and ascending colectomy. The patient was discharged on postoperative day 26 after an uneventful recovery. Two months later, he was readmitted because of ascites, with positivity of spindle cells shown on cytology; he died on day 92 after surgery. In the resected specimen, the tumor had a mostly sarcomatous component, consisting of spindle-shaped cells, and a small glandular component. Immunohistochemically, both components were positive for cytokeratin and epithelial membrane antigen, but negative for vimentin and desmin. The tumor was diagnosed as a spindle cell carcinoma of the pancreas. Perineural invasion, lymphatic permeation, and blood vessel invasion were found, but lymph node metastasis was not found. Although a curative operation was performed, the outcome in this patient was very poor.
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Qiang YW, Kitagawa M, Higashi M, Ishii G, Morimoto C, Harigaya K. Activation of mitogen-activated protein kinase through alpha5/beta1 integrin is required for cell cycle progression of B progenitor cell line, Reh, on human marrow stromal cells. Exp Hematol 2000; 28:1147-57. [PMID: 11027833 DOI: 10.1016/s0301-472x(00)00521-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Attachment to bone marrow (BM) stromal cells is crucial for the normal growth and development of B-cell progenitors (pro-B). However, the molecular mechanisms by which contact facilitates the proliferation of pro-B cells are not completely understood. This study was performed to investigate this interaction. MATERIALS AND METHODS A model pro-B cell line (Reh) and a human BM stromal cell line (KM102) were used. Flow cytomery was used for cell cycle analysis. Western Blotting and immunoprecipitation were utilized to examine the levels of cyclin-dependent kinase (cdk) and p27(Kip1). RESULTS Attachment to both KM102 and normal BM stromal cells significantly promoted the growth of Reh cells. Pretreatment of Reh cells with anti-integrin beta1 or alpha5 monoclonal antibody (mAb), but not alpha4 or ICAM-1 mAb, abrogated this enhancement of proliferation. Furthermore, stroma attachment resulted in shortening of the G(1) phase of cell cycle, significant increases cdk2 activity, degradation of cdk inhibitor p27-GST protein, and decrease in levels of p27(Kip1) protein. In addition, solid-phase cross-linking of alpha5 via immobilized antibody also resulted in extracellular signal-regulated (ERK)-2 kinase phosphorylation, increase in cdk2 activity, decrease in levels of p27(Kip1) protein, and enhanced proliferation that was inhibited by treatment with PD98059, a specific ERK inhibitor. CONCLUSION Integrin alpha5beta1-mediated stroma contact promotes the proliferation of B-cell progenitors through the activation of ERK-2, which in turn modulates cell cycle regulation machinery including induction of cdk2 activity and degradation of p27(Kip1) and contributing to acceleration of the G(1) phase of cell cycle progression.
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Mihara N, Johkoh T, Ichikado K, Honda O, Higashi M, Tomiyama N, Maeda M, Hamada S, Naito H, Nakamura H, Yoshida S, Akira M, Yamamoto S. Can acute interstitial pneumonia be differentiated from bronchiolitis obliterans organizing pneumonia by high-resolution CT? RADIATION MEDICINE 2000; 18:299-304. [PMID: 11128400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/15/2023]
Abstract
PURPOSE In the early stages, clinical and chest radiographic findings of acute interstitial pneumonia (AIP) are often similar to those of bronchiolitis obliterans organizing pneumonia (BOOP). However, patients with AIP have a poor prognosis, while those with BOOP can achieve a complete recovery after corticosteroid therapy. The objective of this study was to identify differences in high-resolution CT (HRCT) findings between the two diseases. METHODS The study included 27 patients with AIP and 14 with BOOP who were histologically diagnosed [open-lung biopsy (n=7), autopsy (n=17), transbronchial lung biopsy (n=17)]. The frequency and distribution of various HRCT findings for each disease were retrospectively evaluated. RESULTS Traction bronchiectasis, interlobular septal thickening, and intralobular reticular opacities were significantly more prevalent in AIP (92.6%, 85.2%, and 59.3%, respectively) than in BOOP (42.9%, 35.7%, and 14.3%, respectively) (p<0.01). Parenchymal nodules and peripheral distribution were more prevalent in BOOP (28.6% and 57.1%, respectively) than in AIP (7.4% and 14.8%, respectively) (p<0.01). Areas with ground-glass attenuation, air-space consolidation, and architectural distortion were common in both AIP and BOOP. CONCLUSION For a differential diagnosis of AIP and BOOP, special attention should be given to the following HRCT findings: traction bronchiectasis, interlobular septal thickening, intralobular reticular opacities, parenchymal nodules, pleural effusion, and peripheral zone predominance.
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Shimizu S, Lichter PR, Johnson AT, Zhou Z, Higashi M, Gottfredsdottir M, Othman M, Moroi SE, Rozsa FW, Schertzer RM, Clarke MS, Schwartz AL, Downs CA, Vollrath D, Richards JE. Age-dependent prevalence of mutations at the GLC1A locus in primary open-angle glaucoma. Am J Ophthalmol 2000; 130:165-77. [PMID: 11004290 DOI: 10.1016/s0002-9394(00)00536-5] [Citation(s) in RCA: 101] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
PURPOSE To screen a population with primary open-angle glaucoma for mutations in the gene that encodes the trabecular meshwork inducible glucocorticoid response protein (TIGR), also known as myocilin (MYOC). METHODS Ophthalmologic information was collected for study subjects with primary open-angle glaucoma and their relatives. Mutation screening of 74 primary open-angle glaucoma probands was conducted by sequencing TIGR/MYOC coding sequence and splice sites. RESULTS In 23 families we detected 13 nonsynonymous sequence changes, nine of which appear to be mutations likely to cause or contribute to primary open-angle glaucoma. Two mutations, Arg272Gly and Ile499Ser, and one nonsynonymous sequence variant, Asn57Asp, are novel. We found mutations in nine of 25 juvenile glaucoma probands (36%) and two of 49 adult-onset glaucoma probands (4%). Age classification of families rather than individual probands revealed mutations in three of nine families with strictly juvenile primary open-angle glaucoma (33%), and no mutations in 39 families with strictly adult-onset primary open-angle glaucoma (0%). In families with mixed-onset primary open-angle glaucoma containing both juvenile primary open-angle glaucoma and adult-onset primary open-angle glaucoma cases, we found mutations in eight of 26 families (31%). CONCLUSIONS Our data suggest that Gly252Arg, Arg272Gly, Glu323Lys, Gln368STOP, Pro370Leu, Thr377Met, Val426Phe, Ile477Asn, and Ile499Ser are likely to play roles that cause or contribute to the etiology of autosomal dominant primary open-angle glaucoma. Our finding of more TIGR/MYOC mutations in families with mixed-onset primary open-angle glaucoma than in the families with strictly adult-onset primary open-angle glaucoma implies that the presence of relatives with juvenile primary open-angle glaucoma in a family could be used as a basis for identifying a subset of the population with adult-onset primary open-angle glaucoma with higher prevalence of TIGR/MYOC mutations. To address this issue, and to refine estimations of mutation prevalence in these age-defined subpopulations, prospective study of a larger population ascertained entirely through adult-onset primary open-angle glaucoma probands will be needed.
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