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Lin F, Clift R, Ehara T, Yanagida H, Horton S, Noncovich A, Guest M, Kim D, Salvador K, Richardson S, Miller T, Han G, Bhat A, Song K, Li G. Peptide Binder to Glypican-3 as a Theranostic Agent for Hepatocellular Carcinoma. J Nucl Med 2024; 65:586-592. [PMID: 38423788 DOI: 10.2967/jnumed.123.266766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 01/23/2024] [Indexed: 03/02/2024] Open
Abstract
Glypican-3 (GPC3) is a membrane-associated glycoprotein that is significantly upregulated in hepatocellular carcinomas (HCC) with minimal to no expression in normal tissues. The differential expression of GPC3 between tumor and normal tissues provides an opportunity for targeted radiopharmaceutical therapy to treat HCC, a leading cause of cancer-related deaths worldwide. Methods: DOTA-RYZ-GPC3 (RAYZ-8009) comprises a novel macrocyclic peptide binder to GPC3, a linker, and a chelator that can be complexed with different radioisotopes. The binding affinity was determined by surface plasma resonance and radioligand binding assays. Target-mediated cellular internalization was radiometrically measured at multiple time points. In vivo biodistribution, monotherapy, and combination treatments with 177Lu or 225Ac were performed on HCC xenografts. Results: RAYZ-8009 showed high binding affinity to GPC3 protein of human, mouse, canine, and cynomolgus monkey origins and no binding to other glypican family members. Potent cellular binding was confirmed in GPC3-positive HepG2 cells and was not affected by isotope switching. RAYZ-8009 achieved efficient internalization on binding to HepG2 cells. Biodistribution study of 177Lu-RAYZ-8009 showed sustained tumor uptake and fast renal clearance, with minimal or no uptake in other normal tissues. Tumor-specific uptake was also demonstrated in orthotopic HCC tumors, with no uptake in surrounding liver tissue. Therapeutically, significant and durable tumor regression and survival benefit were achieved with 177Lu- and 225Ac-labeled RAYZ-8009, as single agents and in combination with lenvatinib, in GPC3-positive HCC xenografts. Conclusion: Preclinical in vitro and in vivo data demonstrate the potential of RAYZ-8009 as a theranostic agent for the treatment of patients with GPC3-positive HCC.
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Affiliation(s)
| | | | | | | | | | | | - Matt Guest
- RayzeBio, Inc., San Diego, California; and
| | - Daniel Kim
- RayzeBio, Inc., San Diego, California; and
| | | | | | | | | | | | | | - Gary Li
- RayzeBio, Inc., San Diego, California; and
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Ishikawa Y, Tanaka N, Asano Y, Kodera M, Shirai Y, Akahoshi M, Hasegawa M, Matsushita T, Kazuyoshi S, Motegi S, Yoshifuji H, Yoshizaki A, Kohmoto T, Takagi K, Oka A, Kanda M, Tanaka Y, Ito Y, Nakano K, Kasamatsu H, Utsunomiya A, Sekiguchi A, Niro H, Jinnin M, Makino K, Makino T, Ihn H, Yamamoto M, Suzuki C, Takahashi H, Nishida E, Morita A, Yamamoto T, Fujimoto M, Kondo Y, Goto D, Sumida T, Ayuzawa N, Yanagida H, Horita T, Atsumi T, Endo H, Shima Y, Kumanogoh A, Hirata J, Otomo N, Suetsugu H, Koike Y, Tomizuka K, Yoshino S, Liu X, Ito S, Hikino K, Suzuki A, Momozawa Y, Ikegawa S, Tanaka Y, Ishikawa O, Takehara K, Torii T, Sato S, Okada Y, Mimori T, Matsuda F, Matsuda K, Imoto I, Matsuo K, Kuwana M, Kawaguchi Y, Ohmura K, Terao C. OP0112 THE EVER-LARGEST ASIAN GWAS FOR SYSTEMIC SCLEROSIS AND TRANS-POPULATION META-ANALYSIS IDENTIFIED SEVEN NOVEL LOCI AND A CANDIDATE CAUSAL SNP IN A CIS-REGULATORY ELEMENT OF THE FCGR REGION. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundGenome-wide association studies (GWASs) have identified 29 disease-associated single nucleotide polymorphisms (SNPs) for systemic sclerosis (SSc) in non-human leukocyte antigen (HLA) regions (1-7). While these GWASs have clarified genetic architectures of SSc, study subjects were mainly Caucasians limiting application of the findings to Asians.ObjectivesThe study was conducted to identify novel causal variants for SSc specific to Japanese subjects as well as those shared with European population. We also aimed to clarify mechanistic effects of the variants on pathogenesis of SSc.MethodsA total of 114,108 subjects comprising 1,499 cases and 112,609 controls were enrolled in the two-staged study leading to the ever-largest Asian GWAS for SSc. After applying a strict quality control both for genotype and samples, imputation was conducted using the reference panel of the phase 3v5 1,000 genome project data combined with a high-depth whole-genome sequence data of 3,256 Japanese subjects. We conducted logistic regression analyses and also combined the Japanese GWAS results with those of Europeans (6) by an inverse-variance fixed-effect model. Polygenicity and enrichment of functional annotations were evaluated by linkage disequilibrium score regression (LDSC), Haploreg and IMPACT programs. We also constructed polygenic risk score (PRS) to predict SSc development.ResultsWe identified three (FCRLA-FCGR, TNFAIP3, PLD4) and four (EOMES, ESR1, SLC12A5, TPI1P2) novel loci in Japanese GWAS and a trans-population meta-analysis, respectively. One of Japanese novel risk SNPs, rs6697139, located within FCGR gene clusters had a strong effect size (OR 2.05, P=4.9×10-11). We also found the complete LD variant, rs10917688, was positioned in cis-regulatory element and binding motif for an immunomodulatory transcription factor IRF8 in B cells, another genome-wide significant locus in our trans-ethnic meta-analysis and the previous European GWAS. Notably, the association of risk allele of rs10917688 was significant only in the presence of the risk allele of the IRF8. Intriguingly, rs10917688 was annotated as one enhancer-related histone marks, H3K4me1, in B cells, implying that FCGR gene(s) in B cells may play an important role in the pathogenesis of SSc. Furhtermore, significant heritability enrichment of active histone marks and a transcription factor C-Myc were found in B cells both in European and Japanese populations by LDSC and IMPACT, highlighting a possibility of a shared disease mechanism where abnormal B-cell activation may be one of the key drivers for the disease development. Finally, PRS using effects sizes of European GWAS moderately fit in the development of Japanese SSc (AUC 0.593), paving a path to personalized medicine for SSc.ConclusionOur study identified seven novel susceptibility loci in SSc. Downstream analyses highlighted a novel disease mechanism of SSc where an interactive role of FCGR gene(s) and IRF8 may accelerate the disease development and B cells may play a key role on the pathogenesis of SSc.References[1]F. C. Arnett et al. Ann Rheum Dis, 2010.[2]T. R. Radstake et al. Nat Genet, 2010.[3]Y. Allanore et al. PLoS Genet, 2011.[4]O. Gorlova et al. PLoS Genet, 2011.[5]C. Terao et al. Ann Rheum Dis, 2017.[6]E. López-Isac et al. Nat Commun, 2019.[7]W. Pu et al. J Invest Dermatol, 2021.Disclosure of InterestsNone declared
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Abstract
Derived from the yeast whole-genome duplication, Saccharomyces cerevisiae GAL1 and GAL3 encode the catabolic enzyme galactokinase (Gal1) and its transcriptional coinducer (Gal3), whereas the ancestral, preduplicated GAL1 gene performed both functions. Previous studies indicated that divergence was primarily driven by changes in upstream promoter elements, and changes in GAL3's coding region are assumed to be the result of drift. We show that replacement of GAL3's open-reading-frame with GAL1's results in an extended lag phase upon switching to growth on galactose with up to 2.5-fold differences in the initial cell masses. Accordingly, the binding affinity of Gal3 to Gal80 was found to be greater than 10-folds higher than that of Gal1, with both a higher association rate (ka) and lower dissociation (kd) rate. Thus, while changes in the noncoding, regulatory regions were the initial driving force for GAL3's subfunctionalization as a coinducer, adaptive changes in the protein sequence seem to have followed.
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Affiliation(s)
- Tali Lavy
- Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, Israel
| | - Hayato Yanagida
- Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, Israel
| | - Dan S Tawfik
- Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, Israel
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Yanagida H, Gispan A, Kadouri N, Rozen S, Sharon M, Barkai N, Tawfik DS. The Evolutionary Potential of Phenotypic Mutations. PLoS Genet 2015; 11:e1005445. [PMID: 26244544 PMCID: PMC4526572 DOI: 10.1371/journal.pgen.1005445] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 07/15/2015] [Indexed: 01/08/2023] Open
Abstract
Errors in protein synthesis, so-called phenotypic mutations, are orders-of-magnitude more frequent than genetic mutations. Here, we provide direct evidence that alternative protein forms and phenotypic variability derived from translational errors paved the path to genetic, evolutionary adaptations via gene duplication. We explored the evolutionary origins of Saccharomyces cerevisiae IDP3 - an NADP-dependent isocitrate dehydrogenase mediating fatty acids ß-oxidation in the peroxisome. Following the yeast whole genome duplication, IDP3 diverged from a cytosolic ancestral gene by acquisition of a C-terminal peroxisomal targeting signal. We discovered that the pre-duplicated cytosolic IDPs are partially localized to the peroxisome owing to +1 translational frameshifts that bypass the stop codon and unveil cryptic peroxisomal targeting signals within the 3’-UTR. Exploring putative cryptic signals in all 3’-UTRs of yeast genomes, we found that other enzymes related to NADPH production such as pyruvate carboxylase 1 (PYC1) might be prone to peroxisomal localization via cryptic signals. Using laboratory evolution we found that these translational frameshifts are rapidly imprinted via genetic single base deletions occurring within the very same gene location. Further, as exemplified here, the sequences that promote translational frameshifts are also more prone to genetic deletions. Thus, genotypes conferring higher phenotypic variability not only meet immediate challenges by unveiling cryptic 3’-UTR sequences, but also boost the potential for future genetic adaptations. The rarity of genetic mutations limits the likelihood of adaptation. However, transcriptional and translational errors, so-called phenotypic mutations, are >105-fold more frequent, thus generating protein mutants from unmodified genes. We provide the first evidence that phenotypic mutations paved the path to what later, after gene duplication, became newly compartmentalized enzymes. Thus, gene duplication followed rather than initiated the divergence of this new trait. Our findings also show that translational infidelity and phenotypic variability comprise the origins of evolutionary innovations, and how selection for enhanced phenotypic variability also promotes the appearance of genetic mutations that lead to the very same outcome.
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Affiliation(s)
- Hayato Yanagida
- Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, Israel
| | - Ariel Gispan
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - Noam Kadouri
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - Shelly Rozen
- Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, Israel
| | - Michal Sharon
- Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, Israel
| | - Naama Barkai
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - Dan S. Tawfik
- Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, Israel
- * E-mail:
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Yanagida H, Matsuura T, Kazuta Y, Yomo T. In vitro selection of proteins that undergo covalent labeling with small molecules by thiol-disulfide exchange by using ribosome display. Chembiochem 2011; 12:962-9. [PMID: 21384482 DOI: 10.1002/cbic.201000620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Indexed: 11/10/2022]
Abstract
There is a great deal of interest in proteins that can bind covalently to target molecules, as they allow unambiguous experiments by tight binding to molecules of interest. Here, we report the generation of proteins that undergo covalent labeling with small molecules through in vitro selection by using ribosome display. Selection was performed from a mutant library of the WW domain with a biotinylated peptide as its binding target, in which the biotin and the peptide are connected by a disulfide bond. After five rounds of selection, we identified mutants carrying a particular cysteine mutation. The binding target reacted specifically with the selected mutant, even in the presence of other proteins, and resulted in the generation of biotin- or peptide-labeled WW domains by thiol-disulfide exchange. When the mutant was fused to a protein of interest, the fusion protein was also labeled with biotin. Thus, the characteristics of the selected mutant should be suitable as a tag sequence that can be covalently labeled with small synthetic molecules. These results indicate that the rapid and efficient generation of such proteins is possible by ribosome display.
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Affiliation(s)
- Hayato Yanagida
- Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka, Japan
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Abstract
ABSTRACTLead titanate fibers were formed from lead acetate and titanium isopropoxide by sol-gel methods. Additions of acids and chelating agents were used to influence hydrolysis and condensation reactions. A variety of solvents were examined, and the effect of conditioning treatments at elevated temperatures were investigated. Data are reported for the rheological behavior of viscous sols, fiber drawing ability, pyrolysis and crystallization of gels and fibers. Features of the ceramic microstructure are reported. A pyroelectric effect was measured for PbTiO3 fibers.
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Abstract
Directed evolution experiments are performed to improve the properties of proteins by creating a library of mutated genes of interest and selecting those genes that encode proteins exhibiting desired properties. Here, we present one of the methods to carry out an evolutionary experiment called ribosome display. Ribosome display allows this process to be carried out entirely in vitro, and it is therefore a rapid and robust method for protein evolution.
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Affiliation(s)
- Hayato Yanagida
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
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Yanagida H, Matsuura T, Yomo T. Compensatory evolution of a WW domain variant lacking the strictly conserved Trp residue. J Mol Evol 2007; 66:61-71. [PMID: 18087661 DOI: 10.1007/s00239-007-9061-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2007] [Revised: 11/09/2007] [Accepted: 11/19/2007] [Indexed: 10/22/2022]
Abstract
Replacement of conserved amino acid residues during evolution of proteins can lead to divergence and the formation of new families with novel functions, but is often deleterious to both protein structure and function. Using the WW domain, we experimentally examined whether and to what degree second-site mutations can compensate for the reduction of function and loss of structure that accompany substitution of a strictly conserved amino acid residue. The W17F mutant of the WW domain, with substitution of the most strictly conserved Trp residue, is known to lack a specific three-dimensional structure and shows reduced binding affinity in comparison to the wild type. To obtain second-site revertants, we performed a selection experiment based on the proline-rich peptide (PY ligand) binding affinity using the W17F mutant as the initial sequence. After selection by ribosome display, we were able to select revertants that exhibited a maximum ninefold higher affinity to the PY ligand than the W17F mutant and showed an even better affinity than the wild type. In addition, we found that the functional restoration resulted in increased binding specificity in selected revertants, and the structures were more compact, with increased amounts of secondary structure, in comparison to the W17F mutant. Our results suggest that the defective structure and function of the proteins caused by mutations in highly conserved residues occurring through divergent evolution not only can be restored but can be further improved by compensatory mutations.
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Affiliation(s)
- Hayato Yanagida
- Graduate School of Frontier Biosciences, Osaka University, 2-1 Yamadaoka, Suita, Osaka, Japan
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Saglam M, Yanagida H, Matsunaga K, Murayama N, Hayashida Y, Nakanishi R. Can theta burst transcranial magnetic stimulation affect cortico-muscular synchronization in humans? Neurosci Res 2007. [DOI: 10.1016/j.neures.2007.06.409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Matsuura T, Yanagida H, Ushioda J, Urabe I, Yomo T. Nascent chain, mRNA, and ribosome complexes generated by a pure translation system. Biochem Biophys Res Commun 2007; 352:372-7. [PMID: 17134678 DOI: 10.1016/j.bbrc.2006.11.050] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2006] [Accepted: 11/07/2006] [Indexed: 11/25/2022]
Abstract
Ribosome display is based on the concept that ternary complexes consisting of a nascent chain, ribosome, and mRNA can be generated, thereby establishing the linkage between genotype and phenotype that is essential for evolutionary experiments. With cell extract-based in vitro translation systems, it has been shown that ternary complexes can be generated by omitting the termination codon from the constructs, which can be stabilized at low temperature in the presence of high Mg2+ concentrations. Using an Escherichia coli-based reconstituted in vitro translation system (PURE system), in which all components necessary for the translation reaction were highly purified and reconstituted, ternary complexes could be generated equally well with a variety of sequences at the 3' end of the RNA, even those with a termination codon. Moreover, the generated complexes were stable at temperatures between 4 and 50 degrees C, and are thus highly stable in contrast to previous assumptions.
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Affiliation(s)
- Tomoaki Matsuura
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Japan
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Sugimoto K, Yanagida H, Yagi K, Kuwajima H, Okada M, Takemura T. A Japanese family with Alport syndrome associated with esophageal leiomyomatosis: genetic analysis of COL4A5 to COL4A6 and immunostaining for type IV collagen subtypes. Clin Nephrol 2005; 64:144-50. [PMID: 16114791 DOI: 10.5414/cnp64144] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND In some families, X-linked Alport syndrome (AS) is associated with diffuse leiomyomatosis. We describe clinical, pathologic and molecular-genetic findings in a Japanese family with this inheritance mode of AS in association with leiomyomatosis. PATIENT AS was diagnosed in a one-year-old boy with recurrent aspiration pneumonia caused by esophageal stenosis from leiomyomatosis. Diagnosis was confirmed by electron microscopy coupled with type IV collagen chain subtype staining in a renal biopsy specimen. His mother, who exhibited esophageal leiomyomatosis and is heterozygous for AS, showed a discontinuous staining pattern for collagen alpha5(IV) chain along the epidermal basement membrane in a skin biopsy specimen. Genetic analysis in the boy revealed the deletion of the first two exons of COL4A6 together with deletion of the 5' end of COL4A5. Despite administration of cyclosporin A, massive proteinuria has persisted in the boy, although renal function otherwise remains normal. CONCLUSION Identification of an AS patient during infancy is extremely rare. Clinical manifestations, including macroscopic hematuria, cataracts and leiomyomatosis caused by the large deletion involving COL4A5 to COL4A6, led to early presentation with AS.
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Affiliation(s)
- K Sugimoto
- Department of Pediatrics, Kinki University School of Medicine, Ohno-higashi, Osaka-Sayama, Japan
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Yanagida H, Kaibori M, Yamada M, Habara K, Yokoigawa N, Kwon AH, Kamiyama Y, Okumura T. Induction of inducible nitric oxide synthase in hepatocytes isolated from rats with ischemia-reperfusion injury. Transplant Proc 2005; 36:1962-4. [PMID: 15518712 DOI: 10.1016/j.transproceed.2004.08.055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
BACKGROUND Recent evidence indicates that nitric oxide (NO) has a crucial role in hepatic ischemia-reperfusion (I/R) injury. However, little is known about how I/R influences the gene expression of inducible nitric oxide synthase (iNOS) in hepatocytes. Under inflammatory conditions, we compared the induction of iNOS in hepatocytes isolated from normal and I/R-treated rats. METHODS Hepatocytes were isolated using the collagenase perfusion method from rats treated with I/R (30-minute ischemia of middle and left lobes, followed by 3-hour reperfusion) or sham operation (control): Primary cultures of rat hepatocytes were incubated with an inflammatory cytokine, interleukin-1beta (IL-1beta), to compare the iNOS induction/NO production between the 2 groups. RESULTS Both control and I/R groups had no production of nitrite (a stable metabolite of NO) in the absence of IL-1beta. In the control group, IL-1beta stimulated dose- and time-dependent production of NO. The I/R group showed more than 2-fold increased levels of NO production. Western and Northern blot analyses revealed that the I/R group also showed increased levels of iNOS protein and its messenger RNA. CONCLUSION These results suggest that I/R directly affects the inducibility of the iNOS gene in hepatocytes by IL-1beta. Increased NO may be associated with protective or toxic effects in hepatic I/R injury.
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Affiliation(s)
- H Yanagida
- Department of Surgery, Kansai Medical University, Osaka, Japan
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Kaibori M, Yanagida H, Yokoigawa N, Hijikawa T, Kwon AH, Okumura T, Kamiyama Y. Effects of pirfenidone on endotoxin-induced liver injury after partial hepatectomy in rats. Transplant Proc 2005; 36:1975-6. [PMID: 15518716 DOI: 10.1016/j.transproceed.2004.08.063] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND In living donor liver transplantation, restrictions on graft size are a serious obstacle to expand indications for adult recipients. The sequence of gram-negative infection, septicemia, and multiple-organ failure is a common cause of early mortality after liver transplantation. An effective therapy has not been established for endotoxemia following extended hepatectomy in donors or small-for-size grafts in recipients. Pirfenidone (PFD), a new experimental antifibrotic agent, was used to ameliorate on endotoxin-induced liver injury following partial hepatectomy. METHODS Male Sprague-Dawley rats were intravenously administered lipopolysaccharide (LPS) 48 hours after 70% hepatectomy. Prior to LPS administration, PFD (300 mg/kg) or its vehicle (0.5% carboxymethylcellulose) was given orally twice. RESULTS The survival rate of the PFD-treated group was markedly improved compared with that of the controls. PFD prevented the increases in the activities of serum enzymes (aspartate transaminase [AST], alanine transaminase [ALT], and lactate dehydrogenase [LDH]) and total bilirubin. The serum and liver tissue levels of inflammatory cytokines, such as tumor necrosis factor-alpha, interleukin-1beta, interferon-gamma, and interleukin-6, were significantly lower among the PFD than the control group. Furthermore, the degree of necrosis in the remnant liver was significantly decreased in the PFD-treated rats compared with controls. CONCLUSION These results indicate that PFD alleviates endotoxin-induced liver injury after partial hepatectomy through the inhibition of production of inflammatory cytokines in the residual liver. PFD may be useful to prevent endotoxin-induced liver injury after hepatectomy.
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Affiliation(s)
- M Kaibori
- Department of Surgery, Kansai Medical University, Osaka, Japan.
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Yanagida H, Ikeoka M, Kuwajima H, Wada N, Tabata N, Sugimoto K, Okada M, Takemura T. A boy with Japanese Dent's disease exhibiting abnormal calcium metabolism and osseous disorder of the spine: defective megalin expression at the brushborder of renal proximal tubules. Clin Nephrol 2004; 62:306-12. [PMID: 15524062 DOI: 10.5414/cnp62306] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We encountered a 16-year-old boy with Japanese Dent's disease who exhibited renal insufficiency and an osseous disorder of the spine. Proteinuria first was noted at the age of 2 years. At 13 years, the patient underwent analysis of the CLCN5 gene, which identified missense mutation (I524K) in exon 10. During follow-up, a marked increase in urinary beta2-microglobulin was associated with mild deterioration of renal function. At the age of 15 years, hypocalcemia (7.5 mg/dl) accompanied by an increased plasma concentration of alkaline phosphatase was first detected. At that time, plasma concentration of 25(OH)D3 and 1'alpha25(OH)2D3 were low accompanied by a high plasma parathyroid hormone concentration. A renal biopsy specimen revealed tubulointerstitial alterations including mononuclear cell infiltration, partial fibrosis and focal glomerular sclerosis. Immunofluorescence revealed weak, discontinuous staining of megalin along the brushborder of renal proximal tubules. Western blotting demonstrated decreased urinary excretion of megalin. Thus, clinical manifestations and prognosis may vary in Japanese Dent's disease. Reduced megalin expression may have disturbed calcium homeostasis, leading to osseous disorder in our patient.
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Affiliation(s)
- H Yanagida
- Department of Pediatrics, Kinki University School of Medicine, Osaka-Sayama, Japan
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Kaibori M, Yanagida H, Nakanishi H, Yokoigawa N, Kwon AH, Okumura T, Kamiyama Y. Effect of hepatocyte growth factor on induction of cytokine-induced neutrophil chemoattractant in rat hepatocytes. Transplant Proc 2004; 36:1977-9. [PMID: 15518717 DOI: 10.1016/j.transproceed.2004.08.064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND Restrictions on graft size are a serious obstacle to the expansion of indications for adult recipients in living donor liver transplantation. Hepatocyte growth factor (HGF) has a crucial role in regeneration following hepatic injury. Rat cytokine-induced neutrophil chemoattractant (CINC), a member of the interleukin-8 superfamily in humans, has been implicated in chronic liver diseases or development of liver ischemia-reperfusion injury. Studies were performed to examine whether HGF influences the induction of CINC in hepatocytes. METHODS Primary cultures of rat hepatocytes were treated with or without recombinant human (rh) HGF. The release of CINC into the culture medium and levels of CINC mRNA were measured using an enzyme-linked immunosorbent assay and Northern blot analysis. Transcription of nuclear factor (NF)-kappa B was detected by electrophoretic mobility shift assays. RESULTS rhHGF increased the release of CINC in the medium dose- and time-dependently, showing a maximal effect at 100 ng/mL. Genistein (100 mumol/L) blocked the release of CINC stimulated by rhHGF. Levels of CINC mRNA were also increased, reaching a maximum at 8 hours after addition of rhHGF. Electrophoretic mobility shift assays revealed rhHGF activated transcription factor, NF-kappa B. CONCLUSION These results suggest that HGF stimulates the induction of CINC gene expression through activation of NF-kappa B. CINC may be involved in the function of HGF during liver regeneration.
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Affiliation(s)
- M Kaibori
- Department of Surgery, Kansai Medical University, Osaka, Japan.
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Kaibori M, Yanagida H, Uchida Y, Yokoigawa N, Kwon AH, Okumura T, Kamiyama Y. Pirfenidone protects endotoxin-induced liver injury after hepatic ischemia in rats. Transplant Proc 2004; 36:1973-4. [PMID: 15518715 DOI: 10.1016/j.transproceed.2004.08.061] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Pirfenidone (PFD), an experimental antifibrotic agent, was investigated for its effects on endotoxin-induced liver injury after hepatic ischemia-reperfusion. METHODS Male Sprague-Dawley rats were subjected to 30 minutes of partial hepatic ischemia, followed by reperfusion for 24 hours. Lipopolysaccharide (LPS) was injected at 30 minutes of reperfusion. PFD (300 mg/kg) or its vehicle (0.5% carboxymethylcellulose) was given orally following LPS administration. RESULTS PFD prevented the increase in activities of serum alanine transaminase, aspartate transaminase, and lactate dehydrogenase after reperfusion. PFD inhibited the increase of cytokine-induced neutrophil chemoattractant in serum and liver tissue. The number of neutrophils infiltrating the liver was significantly lower in the PFD-treated group than the control group. CONCLUSION These results indicate that PFD prevents endotoxin-induced liver injury after hepatic ischemia-reperfusion, in part through the decrease of neutrophil infiltration to the liver.
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Affiliation(s)
- M Kaibori
- Department of Surgery, Kansai Medical University, Osaka, Japan.
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17
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Abstract
BACKGROUND Hepatic ischemia-reperfusion results in a neutrophil-dependent liver injury. The process of neutrophil recruitment and activation in this injury is at least partially dependent on the induction of chemokines, such as cytokine-induced neutrophil chemoattractant (CINC) and macrophage inflammatory protein-2 (MIP-2) in rats. In the liver, parenchymal cells (hepatocytes), in addition to nonparenchymal cells such as Kupffer cells, have been reported to produce chemokines in the regulation of hepatic inflammation. Pirfenidone (PFD) is a new experimental drug used as an antifibrotic agent. Studies were performed to determine whether PFD influences the production of CINC and MIP-2 stimulated by interleukin (IL)-1beta in a primary culture model of rat hepatocytes. METHODS Primary cultures of rat hepatocytes were treated with IL-1beta in the presence and absence of PFD. The protein and mRNA of CINC and MIP-2 were analyzed using enzyme-linked immunosorbent assays and Northern blots. RESULTS IL-1beta increased the release of CINC and MIP-2 into culture media in a dose- and time-dependent manner. PFD inhibited both CINC and MIP-2 release in dose-dependent fashion. However, PFD had no effect on the levels of CINC mRNA induced by IL-1beta. CONCLUSION These results suggest that PFD inhibits the production of CINC and MIP-2 by IL-1beta at a posttranscriptional step in hepatocytes.
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Affiliation(s)
- M Kaibori
- Department of Surgery, Kansai Medical University, Osaka, Japan.
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18
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Shimoe S, Tanoue N, Yanagida H, Atsuta M, Koizumi H, Matsumura H. Comparative strength of metal-ceramic and metal-composite bonds after extended thermocycling. J Oral Rehabil 2004; 31:689-94. [PMID: 15210031 DOI: 10.1111/j.1365-2842.2004.01391.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The relative strengths of ceramic-to-metal and composite-to-metal bonds were compared after prolonged thermocycling. A total of 104 cast discs were produced from a gold alloy (Pontor LFC). A ceramic material (Duceragold) was fused to 24 discs to assess the strength of the metal-ceramic bond. An indirect composite material (New Metacolor Infis) was bonded to the remaining discs after surface preparation by Rocatec tribochemical coating, tin plating and priming with a phosphate conditioner [10-methacryloyloxydecyl dihydrogen phosphate (MDP), Cesead II], priming with a thione conditioner (V-Primer) or no treatment (unprimed control). Shear bond strengths were determined before and after thermocycling at 20,000 and 100,000 cycles. Pre-thermocycling bond strengths were ranked in the order: metal-ceramic (40.5 MPa); Rocatec treatment (33.1 MPa) and tin plating-MDP (31.0 MPa); V-Primer (20.9 MPa); and control (11.9 MPa). The bond strengths of the first three groups were not significantly different after 20,000 thermocycles, whereas those of the V-Primer and control groups were significantly reduced. After extended thermocycling (100,000 cycles) the metal-ceramic group had the highest mean shear bond strength (28.5 MPa; P < 0.05), followed by the Rocatec (23.9 MPa) and tin plating-MDP (22.1 MPa) groups. The metal-ceramic bond was the most durable, although its strength was reduced by 29.6% after extended thermocycling. On the basis of these results, we recommend the Rocatec and tin plating-MDP systems for composite-to-metal bonding. Metal-ceramic bonding, however, is superior to metal-composite bonding within the limitation of the current experiment.
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Affiliation(s)
- S Shimoe
- Department of Fixed Prosthodontics and Oral Rehabilitation, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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19
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Takemura T, Yanagida H, Yagi K, Moriwaki K, Okada M. Alport syndrome and benign familial hematuria (thin basement membrane disease) in two brothers of a family with hematuria. Clin Nephrol 2003; 60:195-200. [PMID: 14524583 DOI: 10.5414/cnp60195] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Alport syndrome (AS) and benign familial hematuria (BFH) are inherited disorders of the glomerular basement membrane, which are sometimes difficult to differentiate at the early stage without type IV collagen staining of the renal basement membrane. Previous studies have indicated that mutation of type IV collagen alpha4 gene may be responsible for both BFH and AS. We report here a Japanese family with consanguinity, in which autosomal-recessive AS and BFH were separately identified in two brothers on the basis of findings of electron microscopy and type IV collagen chain staining of the renal biopsy specimens. Their parents, being first cousins, paternal uncle and grandmothers were found to have hematuria. Our observations suggest that BFH patients were heterozygous carriers of autosomal-recessive AS.
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Affiliation(s)
- T Takemura
- Department of Pediatrics, Kinki University School of Medicine, Osaka, Japan.
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20
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Matsumura H, Tanoue N, Yanagida H, Atsuta M, Koike M, Yoneyama T. Adhesive bonding of super-elastic titanium-nickel alloy castings with a phosphate metal conditioner and an acrylic adhesive. J Oral Rehabil 2003; 30:653-8. [PMID: 12787464 DOI: 10.1046/j.1365-2842.2003.01112.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The purpose of the current study was to evaluate the bonding characteristics of super-elastic titanium-nickel (Ti-Ni) alloy castings. Disk specimens were cast from a Ti-Ni alloy (Ti-50.85Ni mol%) using an arc centrifugal casting machine. High-purity titanium and nickel specimens were also prepared as experimental references. The specimens were air-abraded with alumina, and bonded with an adhesive resin (Super-Bond C & B). A metal conditioner containing a phosphate monomer (Cesead II Opaque Primer) was also used for priming the specimens. Post-thermocycling average bond strengths (MPa) of the primed groups were 41.5 for Ti-Ni, 30.4 for Ti and 19.5 for Ni, whereas those of the unprimed groups were 21.6 for Ti, 19.3 for Ti-Ni and 9.3 for Ni. Application of the phosphate conditioner elevated the bond strengths of all alloy/metals (P < 0.05). X-ray fluorescence analysis revealed that nickel was attached to the debonded resin surface of the resin-to-nickel bonded specimen, indicating that corrosion of high-purity nickel occurred at the resin-nickel interface. Durable bonding to super-elastic Ti-Ni alloy castings can be achieved with a combination of a phosphate metal conditioner and a tri-n-butylborane-initiated adhesive resin.
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Affiliation(s)
- H Matsumura
- Department of Fixed Prosthodontics, Nagasaki University School of Dentistry, Japan.
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21
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Kaibori M, Yokoigawa N, Yanagida H, Nagahama T, Kwon AH, Kamiyama Y, Okumura T. Effect of exogenously administered HGF activator in liver regeneration. Transplant Proc 2003; 35:439-40. [PMID: 12591478 DOI: 10.1016/s0041-1345(02)03819-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- M Kaibori
- First Department of Surgery, Kansai Medical University, Osaka, Japan
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Abstract
The acoustic mixer presented in this paper is a closed cylinder containing chemical solutions. The ultrasound was generated in a water bath outside of the cylinder. The mixing efficiency was measured by using a laser-photodiode system and by mixing iodine and sodium thiosulfate. Iodine solution has a light brown color which becomes transparent if the solution is mixed with sodium thiosulfate. The unmixed regions of the solution in the container remain dark. Starch was used to make the solution darker. Considering the relative position between the cylinder and the transducer, it was shown that displacements parallel to the axes of the streaming have little effect on the mixing speed. Indeed, the distance of the cylinder from the center of the streaming is more important to obtain ideal mixing performances. The frequency and size of the transducers has been investigated too and little effect was found. In contrast, the wave amplitude seems to be the biggest factor in obtaining rapid mixing.
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Affiliation(s)
- C Suri
- Venture Business Laboratory, Yamagata University, Yonezawa, Japan
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23
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Abstract
The purpose of the present study was to evaluate the surface preparation effects of eight metal conditioners and an adhesive system on bonding between a prosthodontic composite material and cast titanium. Eight primers designed for conditioning base metal alloys (Acryl Bond, All-Bond 2 Primer B, Alloy Primer, Cesead II Opaque Primer, Eye Sight Opaque Primer, Metafast Bonding Liner, Metal Primer II, and MR Bond) as well as a surface modification technique (Siloc) were assessed. Disk specimens cast from titanium (T-Alloy H) were either primed with one of the eight primers or treated with the Siloc system, and then bonded with a light-activated composite material (Artglass). Bond durability was evaluated by thermocycling (4 and 60 degrees C, 1 min each, 20, 000 cycles). After thermocycling, two groups either primed with the Cesead II Opaque Primer material or treated with the Siloc system exhibited significantly greater bond strength (20.0 and 19.0 MPa) than the other groups (0.2-12.6 MPa, P < 0.05). These two systems are considered to be useful for improving bonding between the titanium and the composite material tested.
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Affiliation(s)
- H Yanagida
- Department of Fixed Prosthodontics, Nagasaki University School of Dentistry, Sakamoto, Nagasaki, Japan
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Yanagida H, Matsumura H, Atsuta M. Bonding of prosthetic composite material to Ti-6Al-7Nb alloy with eight metal conditioners and a surface modification technique. Am J Dent 2001; 14:291-4. [PMID: 11803992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
PURPOSE The purpose of the current study was to evaluate the adhesive performance of metal conditioners and a surface modification system when used for bonding between a prosthetic composite material and a titanium alloy. MATERIALS AND METHODS Eight metal conditioners (Acryl Bond, All-Bond 2 Primer B, Alloy Primer, Ces II Opaque Primer, Eye Sight Opaque Primer, Metafast Bonding Liner, Metal Primer II, and MR Bond) and a bonding system (Siloc) were assessed. Cast disk specimens made of a titanium alloy (Ti-6Al-7Nb, T-Alloy Tough) were either primed with one of the eight primers or treated with the Siloc system and bonded with a light-activated prosthetic composite material (Artglass). Shear bond strengths were determined both before and after thermocycling (4 C-60 C, 60 s each, 20,000 cycles) for evaluation of the durability of the bonds. RESULTS The results showed that the Siloc-treated group recorded the greatest post-thermocycling bond strength, followed by the two groups conditioned with the Cesead II Opaque Primer and Alloy Primer agents, both of which contain an identical hydrophobic phosphate-methacrylate functional monomer.
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Affiliation(s)
- H Yanagida
- Department of Fixed Prosthodontics, Nagasaki University School of Dentistry, Japan
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25
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Matsumura H, Yanagida H, Tanoue N, Atsuta M, Shimoe S. Shear bond strength of resin composite veneering material to gold alloy with varying metal surface preparations. J Prosthet Dent 2001; 86:315-9. [PMID: 11552170 DOI: 10.1067/mpr.2001.114823] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
STATEMENT OF PROBLEM Although adequate surface preparation is indispensable to achieve a consistent and durable bond between resin composite materials and the metal substructures of veneered restorations, information on the bonding performance of current metal adhesive systems is limited. PURPOSE The purpose of this study was to evaluate the surface preparation effects of 4 metal conditioners and 1 adhesive system on bonding between a prosthetic resin composite veneering material and a gold casting alloy. MATERIAL AND METHODS Four primers containing sulfur derivative monomer and designed for conditioning noble metal alloys (Alloy Primer, Infis Opaque Primer, Metal Primer II, and Metaltite) and a surface modification technique (Siloc) were assessed. Cast disk specimens made of gold alloy (Pontor LFC) were either primed with 1 of the 4 primers or treated with the Siloc system and bonded with a light-activated prosthetic resin composite material (New Metacolor Infis). Control specimens were also prepared without the use of a bonding agent. Shear bond strengths were determined before and after thermocycling (20,000 cycles) for evaluation of bond durability. RESULTS All of the primed and Siloc-treated groups showed improved 24-hour shear bond strengths compared with the control group. After thermocycling, the groups either primed with the Metaltite conditioner or treated with the Siloc system exhibited the highest mean shear bond strengths. CONCLUSION The Metaltite conditioner and Siloc system each represent a useful method for improving the bond between the gold alloy and resin composite material tested.
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Affiliation(s)
- H Matsumura
- Department of Fixed Prosthodontics, School of Dentistry, Nagasaki University, Nagasaki, Japan.
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26
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Tanaka J, Yanagida H. Reconstruction of the ligament using an interference screw (tendon junction screw). Tech Hand Up Extrem Surg 2001; 5:57-62. [PMID: 16520649 DOI: 10.1097/00130911-200103000-00008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Affiliation(s)
- J Tanaka
- The Department of Orthopedics, Hyogo College of Medicine, Hyogo, Nishinomiya, Japan.
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27
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Taira Y, Yanagida H, Matsumura H, Yoshida K, Atsuta M, Suzuki S. Adhesive bonding of titanium with a thione-phosphate dual functional primer and self-curing luting agents. Eur J Oral Sci 2000; 108:456-60. [PMID: 11037763 DOI: 10.1034/j.1600-0722.2000.108005456.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A consistent bond between the metal framework and the luting agent is desired when resin-bonded prostheses are constructed with titanium. The purpose of this study was to evaluate three different metal primers on titanium bonding. Two sources of titanium (machined 99.9% titanium and cast Titan Ingot JS2) were used. Disk specimens were bonded with eight combinations of three primers and two luting agents (Panavia 21 and Super-Bond C&B), including two controls. Shear bond strengths were determined after 24-h water storage and after 10,000 cycles of thermocycling. Bond strengths were influenced by thermocycling, primer, luting agent and their combinations, but no significant differences were found between the machined 99.9% titanium and the cast ingot. The thione-phosphate dual functional primer (Alloy Primer) was comparable to the phosphate primer (Cesead II Opaque Primer) and the thiophosphate primer (Metal Primer II) for bonding the titanium metals examined. The most durable bond was obtained in three combinations of these primers and one luting agent (Super-Bond C&B).
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Affiliation(s)
- Y Taira
- Department of Fixed Prosthodontics, Nagasaki University School of Dentistry, Japan.
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28
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Yanagida H, Masubuchi Y, Minagawa K, Takimoto J, Ogata T, Koyama K. Dependence of sonochemical luminescence on various sound fields. Ultrasonics 2000; 38:671-675. [PMID: 10829750 DOI: 10.1016/s0041-624x(99)00203-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
To understand the effect of the sound field on sonochemical luminescence, the exact sound pressure must be determined in each field. In this study it was determined by the Shlieren method, which measures the sound pressure without mixing the sound fields. We compared the efficiency of the sonochemical luminescence in three different ways: changing the diameter of the transducer, combining two transducers to obtain crossed propagating directions and surrounding the sound field by a glass cylinder. In the last case cylinders with various sizes were studied. We found that (i) at the same sound pressure, the larger transducer induces stronger luminescence per unit volume, (ii) driving two transducers produces stronger luminescence than the sum of each transducer and (iii) a glass cylinder surrounding the sound field induces stronger luminescence.
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Affiliation(s)
- H Yanagida
- Department of Materials Science and Engineering, Yamagata University, Yonezawa, Japan.
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Yanagida H, Inoue R, Tanaka M, Ito Y. Temperature-sensitive gating of cation current in guinea pig ileal muscle activated by hyperpolarization. Am J Physiol Cell Physiol 2000; 278:C40-8. [PMID: 10644510 DOI: 10.1152/ajpcell.2000.278.1.c40] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The temperature dependence of hyperpolarization-activated current (I(h)) was investigated in freshly isolated guinea pig ileal smooth muscle cells, using the nystatin-perforated whole cell recording technique. Hyperpolarizing pulses (-50 to -120 mV) from -40 mV evoked time-dependent inward rectifying currents with a reversal potential of -33 mV and a slow activation time course well approximated by a single exponential. The properties of these currents, such as steady-state variables, dependence on external K, modification by norepinephrine, and blockade by Cs or ZD-7288, coincide well with those of the "classical" I(h) discovered in the sinoatrial node. Raising the temperature (range: 22-33 degrees C) accelerated the activation time course of this I(h) and shifted its 50% activation potential positively (12 mV/10 degree) with much less change in the maximum conductance. Based on a simple closed-open model, this can be explained by a high temperature dependence of the opening rate constant (temperature coefficient: 3.4). The activation profile of reconstructed I(h) at 36 degrees C suggests that a considerable overlap could occur between the ranges of I(h) activation and physiological membrane potential.
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Affiliation(s)
- H Yanagida
- Department of Pharmacology, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan
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Takemura T, Murata Y, Hino S, Okada M, Yanagida H, Ikeda M, Yoshioka K. Heparin-binding EGF-like growth factor is expressed by mesangial cells and is involved in mesangial proliferation in glomerulonephritis. J Pathol 1999; 189:431-8. [PMID: 10547607 DOI: 10.1002/(sici)1096-9896(199911)189:3<431::aid-path460>3.0.co;2-i] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Heparin-binding epidermal growth factor-like growth factor (HB-EGF), a new member of the EGF family, is mitogenic for several types of cells, through binding to cell surface heparan sulphate proteoglycans. This study has attempted to delineate HB-EGF expression by mesangial cells and to identify its role in experimental and human glomerulonephritis. Rat mesangial cells, cultured in the presence of phorbol acetate, hydrogen peroxide, interleukin-1beta, and tumour necrosis factor-alpha, expressed HB-EGF mRNA. Recombinant HB-EGF stimulated rat mesangial cells to proliferate and to express types I and III collagen. In the rat anti-Thy-1.1 nephritis, glomerular HB-EGF mRNA was up-regulated and peaked at days 5-7; its expression at the protein level in the glomerulus was prominent at days 5-10. By immunofluorescence, HB-EGF was positive predominantly in the mesangial area of renal tissues from 23 of 45 patients with various types of human glomerulonephritis, showing a significant correlation with the grade of mesangial proliferation; there was no staining in tissues from patients with minimal change nephrotic syndrome and normal kidney tissues. These data provide the evidence that HB-EGF is synthesized and expressed by mesangial cells and stimulates mesangial cell proliferation and collagen synthesis in vitro. HB-EGF is a potential mediator in mesangial cell proliferation and matrix expansion in experimental and human glomerulonephritis.
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Affiliation(s)
- T Takemura
- Department of Pediatrics, Kinki University School of Medicine 377-2 Ohno-higashi, Osaka-sayama, Osaka, 589-8511, Japan
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Abstract
It is well-known that nerve growth cones, the growing tips of nerves, play a central role in determining the direction taken by regenerating peripheral nerves though neurotropism and contact guidance. In order to identify the molecules expressed on growth cones that are responsible for contact guidance, we investigated the possible involvement of integrins as sensors for the extracellular matrix. In cultured rat PC-12i cells and chick dorsal root ganglion cells, we found that integrin alpha5beta1 was concentrated in the filopodia and central regions of the growth cones. These integrin alpha5beta1-rich regions corresponded well with the sites where the growth cones came into contact with and adhered to the extracellular matrix. Integrin alpha5beta1 has been reported to bind with fibronectin in the extracellular matrix. When examined by triple staining and confocal laser scanning microscopy, we found that the distribution of integrin alpha5beta1 in the growth cones was very similar to that of actin filaments. Integrin alpha5beta1 was also expressed by Schwann cells. On immuno-electron microscopy, integrin alpha5beta1 was also identified in regenerating axons in vivo. These results suggest that integrin alpha5beta1 expressed on growth cones may function as a sensor for the extracellular matrix and Schwann cells, and thus mediate functionally important interactions in the development and regeneration of peripheral nerves.
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Affiliation(s)
- H Yanagida
- Department of Orthopaedic Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan
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Ishida H, Yanagida H. [Clinical evaluation of serum cytokine from patients with collagen diseases]. Rinsho Byori 1999; 47:327-34. [PMID: 10340006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
PURPOSE Systemic autoimmune diseases such as systemic lupus erythematosus (SLE) and Sjögren's syndrome (SS) are characterized by an imbalance of cytokine production. To clarify the relationship between the profile of cytokines and the pathophysiology of systemic autoimmune diseases, we estimated the cytokine levels in sera from patients with several systemic autoimmune diseases. METHOD Serum cytokine levels in patients with unclassified connective tissue diseases were measured using ultrasensitive specific enzyme-linked immunosorbent assay (ELISA). RESULT These patients were diagnosed using the established category by further examinations within a 2-year period. Sera from patients with SLE contained higher titers of IL-10, and equal levels of IFN gamma and TNF alpha compared with those of normal controls. Patients with progressive systemic sclerosis (PSS) showed lower titers of IL-10 and higher titers of IFN gamma and TNF alpha in their sera than those of healthy controls. Seronegative rheumatoid arthritis (snRA) patients had a higher amount of IL-10 and TNF alpha, equivalent level of IFN gamma in their sera compared to those of controls. Moreover, patients with Sjögren's syndrome (SS) showed higher titers of IL-10 and TNF alpha, and an equivalent level of IFN gamma in their sera compared to healthy volunteers. CONCLUSION Based on these findings, for the differential diagnosis of patients with systemic autoimmune diseases such as SLE, PSS, snRA and SS, it may be useful to measure the levels of cytokines such as IL-10, IFN gamma, and TNF alpha in their sera.
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Affiliation(s)
- H Ishida
- Department of Internal Medicine, Clinical Research Center, National Utano Hospital, Kyoto
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Abstract
The formalin test is an animal model of persistent pain. Although biphasic behavioral responses to formalin injection have been well described, the significance of the biphasic time course of the pain behaviors has not been established. To explore the significance of the behavioral responses to the formalin injection, we measured and analyzed cortical electroencephalogram (EEG) during the formalin tests in rats. Formalin was injected subcutaneously in the hindpaw of freely moving rats, and behavioral responses were visually counted and recorded. Results were compared with a control group which received saline injection. Neocortical EEG was recorded from implanted dural surface electrodes and analyzed using a Fast Fourier Transformation. Formalin produced biphasic pain behaviors with a transient pause between two phases. Cortical EEG recordings showed a biphasic change; a vigilant pattern (a low amplitude high frequency activity) followed by a non-vigilant pattern (a high amplitude low frequency activity), showing a good correlation with apparent arousal states of rats. Observed discrepancies between pain behaviors and EEG-measured vigilance stages included (1) a vigilant EEG pattern persisted during the transient pause of pain behavior, and (2) pain behaviors persisted even after non-vigilant EEG pattern became dominant. The results of the current study showed that there are temporal discrepancies between the pain behaviors and EEG-measured vigilance during the formalin test in rats. The temporal relationship between the 'pain' behaviors and nociception per se may not be as solid as believed.
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Affiliation(s)
- F Ichinose
- Department of Anesthesia, Teikyo University Ichihara Hospital, Ichiharashi, Chiba, Japan.
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Yanagida H, Masubuchi Y, Minagawa K, Ogata T, Takimoto J, Koyama K. A reaction kinetics model of water sonolysis in the presence of a spin-trap. Ultrason Sonochem 1999; 5:133-139. [PMID: 11269952 DOI: 10.1016/s1350-4177(98)00020-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The time development of the concentration of a spin-trapped OH radical was studied by electron spin resonance at various sound intensities and various 5,5-dimethyl-1-pyrroline N-oxide (DMPO) concentrations in water sonolysis. The lifetime of the spin-trapped OH radical was also studied, and factors governing sonolysis are discussed. We found that the production of spin-trapped OH radical increases with increasing ultrasound intensity. The lifetime of a spin-trapped OH radical decreases linearly with increase in sonication time. This result suggests that an unknown scavenger is produced by ultrasound. Based on the above results, we suggested a model of the reaction kinetics and estimated the production rate of OH radical from this model.
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Affiliation(s)
- H Yanagida
- Department of Materials Science and Engineering, Yamagata University, Yonezawa 992, Japan.
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Takemura T, Hino S, Murata Y, Yanagida H, Okada M, Yoshioka K, Harris RC. Coexpression of CD9 augments the ability of membrane-bound heparin-binding epidermal growth factor-like growth factor (proHB-EGF) to preserve renal epithelial cell viability. Kidney Int 1999; 55:71-81. [PMID: 9893115 DOI: 10.1046/j.1523-1755.1999.00259.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Transfection of renal epithelial cells (NRK 52E) with membrane-associated heparin-binding epidermal growth factor-like growth factor (proHB-EGF) increased renal epithelial cell survival by promoting cell-cell and cell-extracellular matrix interactions. ProHB-EGF has been shown to form a complex in the plasma membrane with the tetraspanin CD9, an interaction that significantly increases the effectiveness of proHB-EGF as a juxtacrine mitogenic agent. METHODS We examined whether the coexpression of proHB-EGF and CD9 would increase renal epithelial cell survival. CD9 was stably transfected into NRK 52E cells, either alone (NRKCD9) or together with proHB-EGF (NRKboth). RESULTS Juxtacrine mitogenic activity of NRKCD9 was no different than in cells transfected with vector alone (NRKvector), but was increased by NRKboth; juxtacrine mitogenic activity by NRKboth was twofold greater than when proHB-EGF was transfected alone (NRKproHB-EGF). When grown in 10% fetal calf serum, growth rates were similar among all transfectants. However, in 1% fetal calf serum, NRKproHB-EGF grew 50% faster than NRKvector or NRKCD9, and NRKboth grew 20% to 50% faster than NRKproHB-EGF at one, two, and three days of culture. NRKproHB-EGF attachment to plastic substratum at one, two, and three hours was 250% greater than that of NRKvector, and NRKboth was 20% to 30% greater than that of NRKproHB-EGF. Coating plates with either poly 2-hydroxyethyl methacrylate or the GRGDTP peptide prevented normal cell-extracellular matrix attachment, and NRKvector or NRKCD9 failed to attach or form cell-cell attachments. NRKproHB-EGF exhibited 300% and NRKboth exhibited 600% greater cell viability under these conditions. Expression of type I and type III collagen mRNA was enhanced similarly in NRKproHB-EGF and NRKboth, but the expression of beta1 integrin was up-regulated only in NRKboth. CONCLUSIONS Coexpression of proHB-EGF and CD9 may render the renal epithelial cells more resistant to disruption of cell-cell and cell-matrix interactions and could accelerate the re-establishment of these attachments.
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Affiliation(s)
- T Takemura
- Department of Pediatrics, Kinki University, Osaka, Japan, and Department of Medicine, Vanderbilt University, Nashville, Tennessee, USA
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Matsui Y, Yanagida H, Yoshida H, Imamura A, Kamiyama Y, Kodama H. Seroma with fibrous capsule formation requiring a surgical resection after a modified radical mastectomy: report of a case. Surg Today 1998; 28:669-72. [PMID: 9681623 DOI: 10.1007/s005950050206] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Seroma formation is the most common complication of a modified radical mastectomy for breast cancer. Although various management or risk factors for seroma formation have been previously reported, little has been published concerning seromas with fibrous capsule formation which ultimately require a surgical resection. We herein present a case who developed a seroma with a fibrous capsule after a modified radical mastectomy for breast cancer, in spite of an uneventful intraoperative and postoperative course. The seroma was refractory to all conventional treatments, and thus finally required a surgical resection.
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Affiliation(s)
- Y Matsui
- First Department of Surgery, Kansai Medical University, Moriguchi, Osaka, Japan
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Takahashi H, Miyazaki M, Nanbu T, Yanagida H, Morita S. The NMDA-receptor antagonist ketamine abolishes neuropathic pain after epidural administration in a clinical case. Pain 1998; 75:391-4. [PMID: 9583776 DOI: 10.1016/s0304-3959(97)00189-9] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A 14-year-old male patient developed severe right limb pain after traumatic sciatic nerve injury. His pain was diagnosed as neuropathic pain (complex regional pain syndrome, type II). He did not respond to any conventional therapy for limb pain including non-steroidal antiinflammatory drugs, antidepressants, anticonvulsants, continuous epidural administration of local anesthetics and psychotherapy. Following continuous epidural administration of a very low dose of ketamine, an N-methyl-D-aspartic acid (NMDA) receptor antagonist, 25 microg/kg per h for 10 days, complete pain relief was obtained without any side-effects. There has been no recurrence of pain for 8 months after discontinuation of epidural ketamine. The symptoms related to dysfunction of the sympathetic nervous system still remained after complete pain relief. We discuss pain mechanisms, pain relief and the use of ketamine in this case.
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Affiliation(s)
- H Takahashi
- Pain Center, Department of Anesthesiology, Teikyo University School of Medicine, Ichihara Hospital, Ichihara City, Chiba, Japan.
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38
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Inoue R, Morita H, Yanagida H, Ito Y. Potentiating actions of lanthanum on ACh-induced cation current in guinea-pig ileal smooth muscle cells. J Smooth Muscle Res 1998; 34:69-81. [PMID: 9868703 DOI: 10.1540/jsmr.34.69] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Potentiating actions of external lanthanum (La3+) on muscarinic receptor-activated nonselective cation current (Icat) were investigated in myocytes dissociated from the longitudinal muscle layer of guinea-pig ileum, with a whole-cell variant of the patch clamp technique. Icat was dissected from other membrane currents by loading Cs-aspartate into the cell. Application of submilimolar concentrations of La3+ following 300 microM ACh into the bath caused a dose-dependent increase in the amplitude of Icat. The apparent Kd value for this increase was 190 microM, with a cooperativity factor of 1.7. La(3+)-induced increase in Icat amplitude was not associated with either changes in the reversal potential of Icat or altered sensitivity of muscarinic receptor to ACh, and paralleled by the conductance increase of Icat, the maximum of which (Gmax) occurred at about 1 mM La3+. Voltage-jump experiments revealed that the rate of current relaxation at hyperpolarizing potentials was greatly reduced in the presence of La3+, and correspondingly the steady state activation curve shifted toward more negative potentials. Divalent cations such as Cd2+ or Ni2+, which have been known to block Icat, antagonized the augmentative effect of La3+ on Icat in a competitive fashion, suggesting that the site of their actions might be similar. Furthermore, single Icat activities induced by internal perfusion of GTP gamma S (100 microM) was also greatly enhanced by external addition of 1 mM La3+. Under current clamp conditions, 1 mM La3+ blocked spontaneous Ca2+ spike activities, but was almost without effect on the membrane depolarization induced by ACh. In contrast, milimolar concentrations of Cd2+ and Ni2+ abolished both Ca2+ spike activities and ACh-induced depolarization. Potential importance of La3+ as a tool to investigate the external Ca(2+)-dependence of Icat has been discussed.
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Affiliation(s)
- R Inoue
- Department of Pharmacology, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
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39
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Yamada K, Yanagida H, Ito Y, Inoue R. Postsynaptic enhancement by motilin of muscarinic receptor cation currents in duodenal smooth muscle. Am J Physiol 1998; 274:G487-92. [PMID: 9530149 DOI: 10.1152/ajpgi.1998.274.3.g487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We have investigated a potential role of motilin in amplifying the postsynaptic muscarinic responses in the rabbit duodenal smooth muscle cells, using the whole cell variant of patch-clamp technique. Stimulation of motilin receptors by exogenously applied motilin (1 nM) resulted in a large increase in carbachol (CCh)-induced atropine-sensitive cation current (ICCh) at threshold concentrations of CCh (0.3-1 microM) at 30 degrees C. This potentiation was abolished in the presence of a specific blocker of motilin receptor (GM109) and was attenuated with increased concentrations of either motilin or CCh, being virtually absent with maximally effective concentrations of these agonists. Motilin failed to potentiate ICCh when the ambient temperature was reduced to 20 degrees C or if the cation current had been directly activated by internal perfusion with guanosine 5'-O-(3-thiotriphosphate) (50 microM) bypassing the muscarinic receptor. These results suggest that some biochemical processes, such as enzymatic reactions, might be involved in the motilin-induced potentiation and that its site of action might be the muscarinic receptor and/or associated G proteins.
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Affiliation(s)
- K Yamada
- Department of Pharmacology, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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40
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Ota H, Yanagida H, Dobashi H, Ishida H. [Clonal deletion and clonal anergy as the mechanism of self-tolerance induction]. Nihon Rinsho 1997; 55:1331-6. [PMID: 9200914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In the immune system, it is most important to discriminate self from nonself and to acquire and maintain the unresponsiveness to self antigens, self-tolerance. Recently, the transgenic animals provides the evidence of the mechanism of self-tolerance induction. Self-tolerance is established mainly by elimination, clonal deletion, and functional inactivation, clonal energy, of the autoreactive T cells and B cells. Clonal deletion and clonal anergy are involved not only in the central tolerance, in thymus or bone marrow, but also in the peripheral tolerance. The failure of self-tolerance involves the induction of auto-immune disease.
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Affiliation(s)
- H Ota
- Department of Internal Medicine, Utano National Hospital
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Ishida H, Ota H, Yanagida H, Dobashi H. [An imbalance between Th1 and Th2-like cytokines in patients with autoimmune diseases--differential diagnosis between Th1 dominant autoimmune diseases and Th2 dominant autoimmune diseases]. Nihon Rinsho 1997; 55:1438-43. [PMID: 9200929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
An imbalance between T helper cell (Th)1 and Th2-like cytokines has been described in several autoimmune diseases. Organ specific autoimmune diseases such as multiple sclerosis (MS) and inflammatory bowel diseases (IBD) are caused by Th1 dominant immune responses. On the contrary, systemic autoimmune diseases such as systemic lupus erythematosus (SLE) and Sjögren's syndrome(SS) are characterized by Th2 dominant imbalance of cytokine production. It might be useful for differential diagnosis among patients with various autoimmune diseases such as SLE, SS, IBD, and MS to measure the serum levels of cytokines such as IL-10, IFN gamma, and TNF alpha using ultrasensitive enzyme-linked immunosorbent assay system.
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Affiliation(s)
- H Ishida
- Department of Internal Medicine, National Utano Hospital
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Morinobu A, Kumagai S, Yanagida H, Ota H, Ishida H, Matsui M, Yodoi J, Nakao K. IL-10 suppresses cell surface CD23/Fc epsilon RII expression, not by enhancing soluble CD23 release, but by reducing CD23 mRNA expression in human monocytes. J Clin Immunol 1996; 16:326-33. [PMID: 8946277 DOI: 10.1007/bf01541668] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
To examine a possible involvement of interleukin-10 (IL-10) in CD23/Fc epsilon RII expression in human monocytes, effects of IL-10 on the cell surface CD23 expression, soluble CD23 (sCD23) release, and CD23 type b mRNA expression were investigated. IL-10 suppressed IL-4-induced surface CD23 expression on monocytes in a dose-dependent manner, and this effect was completely neutralized by anti-IL-10 antibody. The suppressive effect of IL-10 on surface CD23 expression was not due to enhancement of sCD23 release from the cell surface because no increase in sCD23 in culture supernatant was detected after incubation with IL-10. Instead, the effect of IL-10 seemed to be exerted at the transcriptional level since IL-4-induced expression of CD23 type b mRNA was significantly reduced when IL-10 was present. Although IL-4 induced surface CD23 expression on both monocytes and B cells, the suppressive effect of IL-10 was observed only on monocytes, which underscores different regulatory mechanisms for CD23 expression between the two cell types.
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Affiliation(s)
- A Morinobu
- Department of Medicine and Clinical Science, Kyoto University, Graduate School of Medicine, Japan
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Ota H, Kumagai S, Morinobu A, Yanagida H, Nakao K. Enhanced production of transforming growth factor-beta (TGF-beta) during autologous mixed lymphocyte reaction of systemic sclerosis patients. Clin Exp Immunol 1995; 100:99-103. [PMID: 7697928 PMCID: PMC1534272 DOI: 10.1111/j.1365-2249.1995.tb03609.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Systemic sclerosis (SSc) is characterized by systemic fibrosis and microvascular lesions. As TGF-beta is suggested to be related to skin fibrosis, we examined the production of TGF-beta from peripheral mononuclear cells (MNC) of SSc patients. Since anti-TGF-beta neutralizing antibody improved the defective proliferative response in autologous mixed lymphocyte reaction (AMLR) of SSc patients, TGF-beta was thought to participate in the decreased AMLR of SSc patients. Greater amounts of TGF-beta in the active as well as in the latent forms were produced during AMLR of SSc patients than that of normal subjects. It was suggested that TGF-beta excessively produced from the MNC of SSc patients might play a major role in the fibrosis of the patients during AMLR-like in vivo responses.
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Affiliation(s)
- H Ota
- Second Department of Internal Medicine, School of Medicine, Kyoto University, Japan
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Mizoguchi A, Yano Y, Hamaguchi H, Yanagida H, Ide C, Zahraoui A, Shirataki H, Sasaki T, Takai Y. Localization of Rabphilin-3A on the synaptic vesicle. Biochem Biophys Res Commun 1994; 202:1235-43. [PMID: 8060298 DOI: 10.1006/bbrc.1994.2063] [Citation(s) in RCA: 85] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Rabphilin-3A is a putative target protein for Rab3A small GTP-binding protein which is implicated in neurotransmitter release. Rabphilin-3A is expressed mainly in brain, but its subcellular localization remains to be clarified. Immunohistochemical analysis has revealed that Rabphilin-3A is most abundant in the synaptic area of the rat cerebellum, retina, and neuromuscular junction. Ultrastructural analysis of the neuromuscular junction using the immunogold method indicates that Rabphilin-3A is localized on the synaptic vesicle. Subcellular fractionation analysis of rat brain has shown that Rabphilin-3A is most highly concentrated in the purified synaptic vesicle fraction. These results indicate that Rabphilin-3A is localized on the synaptic vesicle in the presynapse.
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Affiliation(s)
- A Mizoguchi
- Department of Anatomy, Kobe University School of Medicine, Japan
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Ohara Y, Miyayama M, Koumoto K, Yanagida H. Partially stabilized zirconia-polymer composites fabricated with an ultrasonic cutter. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf00506337] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Yanagida H. [What is pain? Pains experienced by cancer patients at the terminal stage]. Kango 1992; 44:87-94. [PMID: 1305229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Yanagida H. [What is pain? Nursing care after extradural star-shaped nerve block]. Kango 1992; 44:89-96. [PMID: 1305210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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49
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Shiraishi T, Yanagida H, Takada K, Yasuhara Y. Unusual cranial metastasis from hepatoma presenting as isolated unilateral hypoglossal nerve paresis--case report. Neurol Med Chir (Tokyo) 1992; 32:166-8. [PMID: 1377801 DOI: 10.2176/nmc.32.166] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
A 45-year-old male presented with a rare right hypoglossal nerve paresis due to an unusual cranial metastatic tumor from hepatoma. Despite multi-drug chemotherapy and arterial embolization, he died about 1 year later. Such metastasis should be considered as the cause of isolated unilateral hypoglossal nerve paresis.
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Affiliation(s)
- T Shiraishi
- Department of Neurosurgery, Ehime Prefectural Imabari Hospital
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50
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Yanagida H. [What is pain? Nursing care after asterisk nerve block]. Kango 1992; 44:89-95. [PMID: 1305192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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