Abstract:
:Water-insoluble glucan (WIG) produced by mutans streptococci, an important cariogenic pathogen, plays an important role in the formation of dental biofilm and adhesion of biofilm to tooth surfaces. Glucanohydrolases, such as mutanase (α-1,3-glucanase) and dextranase (α-1,6-glucanase), are able to hydrolyze WIG. The purposes of this study were to construct bi-functional chimeric glucanase, composed of mutanase and dextranase, and to examine the effects of this chimeric glucanase on the formation and decomposition of biofilm. The mutanase gene from Paenibacillus humicus NA1123 and the dextranase gene from Streptococcus mutans ATCC 25175 were cloned and ligated into a pE-SUMOstar Amp plasmid vector. The resultant his-tagged fusion chimeric glucanase was expressed in Escherichia coli BL21 (DE3) and partially purified. The effects of chimeric glucanase on the formation and decomposition of biofilm formed on a glass surface by Streptococcus sobrinus 6715 glucosyltransferases were then examined. This biofilm was fractionated into firmly adherent, loosely adherent, and non-adherent WIG fractions. Amounts of WIG in each fraction were determined by a phenol-sulfuric acid method, and reducing sugars were quantified by the Somogyi-Nelson method. Chimeric glucanase reduced the formation of the total amount of WIG in a dose-dependent manner, and significant reductions of WIG in the adherent fraction were observed. Moreover, the chimeric glucanase was able to decompose biofilm, being 4.1 times more effective at glucan inhibition of biofilm formation than a mixture of dextranase and mutanase. These results suggest that the chimeric glucanase is useful for prevention of dental biofilm formation.
journal_name
Microbiol Immunoljournal_title
Microbiology and immunologyauthors
Otsuka R,Imai S,Murata T,Nomura Y,Okamoto M,Tsumori H,Kakuta E,Hanada N,Momoi Ydoi
10.1111/1348-0421.12214subject
Has Abstractpub_date
2015-01-01 00:00:00pages
28-36issue
1eissn
0385-5600issn
1348-0421journal_volume
59pub_type
杂志文章abstract::Sixteen temperature-sensitive mutants of Sendai virus were isolated from mutagenized stocks (10 mutants, designated numerically) and persistently infected cultures (6 mutants, designated alphabetically). Based on complementation tests, virion-associated activities, thermal inactivation, and viral RNA and hemadsorbing ...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1980.tb02911.x
更新日期:1980-01-01 00:00:00
abstract::We have previously shown that immunization of mice with plasmid pMEa synthesizing Japanese encephalitis virus (JEV) envelope protein induced anti-JEV humoral and cellular immune responses. We now show that intra-muscular co-administration of mice with pMEa and pGM-CSF, encoding murine granulocyte-macrophage colony-sti...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.2005.tb03739.x
更新日期:2005-01-01 00:00:00
abstract::We found that mycoplasma-infected cells have a higher ability to metastasize in vivo than non-mycoplasma-infected cells. To investigate this phenomenon, we obtained a monoclonal antibody, MAb 243-5, by immunization with Mycoplasma arginini-infected RPMI 4788 cells. This MAb recognized a mycoplasmal protein with an MW ...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1995.tb02218.x
更新日期:1995-01-01 00:00:00
abstract::To clarify the humoral immunity in herpes simplex virus (HSV) infection, HSV-specific IgM, IgA and IgG subclass antibody responses were studied in patients with genital herpes: 17 primary, 13 recurrent and 6 nonprimary first episode. A total of 181 serum samples serially collected from the patients, 5 per patient unti...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1997.tb01872.x
更新日期:1997-01-01 00:00:00
abstract::Zymographic analysis was performed to know the bacteriolytic enzyme profiles of 4% SDS extracts of oral streptococci, Streptococcus mutans, S. sobrinus, S. sanguis, S. mitis and S. salivarius. We investigated the five strains in each species and found that the profile was very similar among strains of the same species...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.2004.tb03537.x
更新日期:2004-01-01 00:00:00
abstract::Clostridium perfringens KZ1340, previously classified as Clostridium plagarum, is an isolate from Antarctic soil, and was identified as an alpha-, theta-, and kappa-toxin non-producing variant. On Southern hybridization, the variant was found to be defective in the pfoA (theta-toxin) gene, but the plc (alpha-toxin) an...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1996.tb03329.x
更新日期:1996-01-01 00:00:00
abstract::Human metapneumovirus (hMPV) is one of the etiological agents of acute respiratory tract infections. From June 2005 to May 2006, we collected 185 clinical specimens from children in Osaka City, Japan, and detected 41 hMPV RNA. Of the 41 specimens, four (9.8%) also contained other viruses (3 with adenovirus [AdV] and 1...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.2007.tb03956.x
更新日期:2007-01-01 00:00:00
abstract::Healthy cattle and swine bred in a district of Japan were examined for the presence of Clostridium botulinum in their liver. Liver specimens were cultivated in chopped meat-glucose medium and the cultures were examined for botulinum toxin. In cattle, none of the cultures of 100 liver specimens yielded the toxin. In sw...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1992.tb01639.x
更新日期:1992-01-01 00:00:00
abstract::Treatment of macrophages with cytochalasin E in combination with a lectin was found to stimulate the generation of superoxide anions (O2-) very efficiently. The macrophages stimulated with concanavalin A, phytohemagglutinin or wheat germ agglutinin released superoxide, but cells pretreated with cytochalasin E release...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1980.tb02849.x
更新日期:1980-01-01 00:00:00
abstract::The effects of LV in two different species, CD-1 mice, without a genetic disposition for diabetes, and BB rats prone to T1D were examined. Male CD-1 mice that had been exposed to LV in utero developed a type 2-like diabetes with increased blood glucose, insulin levels and epididymal fat at the age of 10-15 weeks. Comb...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.2009.00160.x
更新日期:2009-10-01 00:00:00
abstract::A monoclonal antibody (MoAb) to human neutrophils, designated 3H9, was established by screening for the inhibition of neutrophil adherence to plastic plates containing a medium supplemented with fetal calf serum (FCS medium). The antigen recognized by 3H9 was shown to be present on human leukocytes and found at the hi...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1997.tb01174.x
更新日期:1997-01-01 00:00:00
abstract::Intracellular localization of the wild-type (Spv+), the phoP-constitutively expressed strain (PhoPc), and the spv-deleted strain (Spv-) of Salmonella typhimurium was examined by the use of confocal laser scanning microscopy analysis of immunostained sections of mouse spleens after oral or subcutaneous inoculation. Onl...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.2001.tb01261.x
更新日期:2001-01-01 00:00:00
abstract::Susceptibility of eight strains of influenza A and B viruses to interferon and to poly(I) . poly(C) were determined by the plaque reduction method. All strains tested were slightly less susceptible than vesicular stomatitis virus (VSV) in an established line of canine kidney (MDCK) cells. The 50% plaque depression dos...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1980.tb02873.x
更新日期:1980-01-01 00:00:00
abstract::A solubilized sheep red blood cell (SRBC) antigen (supernatant fraction obtained by centrifuging 10(7)-2 x 108 sonicated SRBC at 6 x 10(4) g for 30 min [Sup-SRBC]), whose ability to inhibit anti-SRBC plaque formation was 70% of that of the original sonicated SRBC, was unable to elicit a detectable antibody response in...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1982.tb00163.x
更新日期:1982-01-01 00:00:00
abstract::Natural killer cells, a critical component of the innate immune system, eradicate both virus-infected cells and tumor cells through cytotoxicity and secretion of cytokines. Human NK cell research has largely been based on in vitro studies because of the lack of appropriate animal models. In this study, a selective pro...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/1348-0421.12355
更新日期:2016-02-01 00:00:00
abstract::There are two types of carboxypeptidases present in human blood, carboxypeptidase N (CPN) and arginine carboxypeptidase (CPR). CPR is generated during coagulation from a precursor (proCPR) which can be converted to the active form by trypsin in vitro. Since it is difficult to distinguish the two types of carboxypeptid...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1999.tb02457.x
更新日期:1999-01-01 00:00:00
abstract::We established an assay system for detecting T cell-replacing factor (TRF) activity of translated materials in Xenopus oocytes of poly (A)-positive mRNA extracted from a T cell hybrid cell line, B151K12 (B151) which constitutively produces TRF. Since it was difficult to detect TRF activity of the translated products o...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1986.tb03005.x
更新日期:1986-01-01 00:00:00
abstract::The 16S rRNA gene sequences were determined for type strains of 21 Bifidobacterium species. A phylogenetic tree was constructed using the determined sequences and sequences from DNA databases, which contain the sequences of 11 type strains of Bifidobacterium species and 11 strains of related genera. All species of the...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1998.tb02337.x
更新日期:1998-01-01 00:00:00
abstract::Salmonella enterica serovar Typhi and serovar Paratyphi A with reduced susceptibility to fluoroquinolones (MICs of ciprofloxacin, 0.25 to 2 microg/ml) have a mutation at codon either Ser-83 or Asp-87 of gyrA gene. A screening method by PCR-restriction fragment length polymorphism (PCR-RFLP) was designed to screen the ...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.2003.tb02800.x
更新日期:2003-01-01 00:00:00
abstract::Previous studies have demonstrated that the murine monoclonal antibody (MoAb) NM-01 activates the human complement classical pathway resulting in lysis of human immunodeficiency virus (HIV). The present study was performed to determine the availability of the V3-loop of gp120 relative to the complement regulatory prot...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1996.tb01109.x
更新日期:1996-01-01 00:00:00
abstract::Diarrheal diseases are major causes of morbidity and mortality among children in developing countries. We have analyzed the causative agents of diarrhea in children under five years of age who resided in rural environments but attended a hospital in Malindi, a coastal town in Kenya. Bacterial diarrhea was found in 239...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1997.tb01925.x
更新日期:1997-01-01 00:00:00
abstract::A sensitive, quantitative, short-time, and reproducible focus assay for Japanese encephalitis (JE) virus is described. After 2 or 3 days of incubation, the infected cells were treated with anti-JE virus serum and complement, and subsequently stained with trypan blue; then clear foci were produced. This method made it ...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1985.tb00802.x
更新日期:1985-01-01 00:00:00
abstract::Four T antigen-positive phenotypic revertants were isolated by negative selection with BUdR from SV40-transformed rat and mouse cells which contain six and two viral genome equivalents per cell, respectively. Karyological analysis indicated that one rat and one mouse revertant had a hyperploid number of chromosomes, w...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1982.tb00151.x
更新日期:1982-01-01 00:00:00
abstract::We evaluated the efficacy of three SARS vaccine candidates in a murine SARS model utilizing low-virulence Pp and SARS-CoV coinfection. Vaccinated mice were protected from severe respiratory disease in parallel with a low virus titer in the lungs and a high neutralizing antibody titer in the plasma. Importantly, the ad...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.2008.00097.x
更新日期:2009-02-01 00:00:00
abstract::B lymphocytes express multiple TLRs that regulate their cytokine production.We investigated the effect of TLR4 and TLR9 activation on receptor activator of NF‐kB ligand (RANKL) expression by rat spleen B cells. Splenocytes or purified spleen B cells from Rowett rats were cultured with TLR4 ligand Escherichia coli LPS ...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/1348-0421.12129
更新日期:2014-01-01 00:00:00
abstract::DNase B is a major nuclease and a possible virulence factor in Streptococcus pyogenes. The allelic diversity of streptococcal DNase B (sdaB) gene was investigated in 83 strains with 14 emm genotypes. Of the 15 alleles identified, 11 alleles carried only synonymous nucleotide substitutions. On the other hand, 4 alleles...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.2005.tb03684.x
更新日期:2005-01-01 00:00:00
abstract::Five groups of 32 chemicals were examined regarding their immunological functions as modifier inactivants to make inactivated Sendai nasal vaccine using a contact exposure experiment, direct immunofluorescent method, and serum HI titer. (1) Five of the nine reactive groups of reactive dyes (2-chloropyridine, 2, 4, 6-t...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1996.tb01138.x
更新日期:1996-01-01 00:00:00
abstract::A recombinant pertussis DNA vaccine was described here with its immunogenicity and the ability to induce protection against B. pertussis infection in mice. Three immunodominant antigen gene fragments of pertussis, pertussis toxin subunit 1 (pts1), fragments of pertactin (prn) and filamentous hemagglutinin (fha), were ...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.2006.tb03869.x
更新日期:2006-01-01 00:00:00
abstract::Tetracycline (pp-tet), and kanamycin (pp-kan) resistance genes were cloned from a transferable R plasmid of fish pathogen Pasteurella piscicida, and complete nucleotide sequences were determined. The pp-tet was a class D Tet determinant constructed with the tetA resistance gene of 1,182 bp encoding a protein with a de...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.1994.tb01741.x
更新日期:1994-01-01 00:00:00
abstract::Coagulase negative staphylococci (CNS) are significant pathogens, particularly in medical device related infections and in immunocompromised patients. Five CNS strains were isolated from 5 NOS2 knockout mice with dermatitis. Histologically, granulomatous dermatitis was found in the skin around the ear with epidermal u...
journal_title:Microbiology and immunology
pub_type: 杂志文章
doi:10.1111/j.1348-0421.2002.tb02744.x
更新日期:2002-01-01 00:00:00