Abstract：
:The origin of ureolytic activity in artificial-mouth plaques was established by assessing the contribution to plaque ureolytic activity of the isolated bacteria. To overcome losses of ureolytic activity caused by the unstable presence of urease in oral bacteria, ureolytic bacteria were isolated from an exceptionally active plaque (1 mumol NH3/min per mg protein) in which 63 per cent of the flora was ureolytic. After their ability to metabolize urea was stabilized, 13 ureolytic bacteria remained: seven strains of Streptococcus salivarius, one Streptococcus bovis, two Staphylococcus epidermidis and three Staphylococcus haemolyticus. Their urease activity, measured after growth into stationary phase, was reproducible and strain specific with a 20-fold range within each genus. The mean ureolytic activity of each species, when weighted by its calculated incidence in the original plaque, accounted for 40 per cent of the total plaque ureolytic activity. However, these values for urease levels were only a small fraction of the bacterial ureolytic potential. Urease per mg cell protein measured during the growth cycle of a selected Strep. salivarius, and Staph. epidermidis, varied 10-fold, and reached much higher activities (i.e. 6-8 mumol NH3/min per mg of cell protein) than under the growth conditions that were used to assess the contribution of these species to total plaque ureolysis. Thus urea metabolism in artificial plaque was due mainly to Strep. salivarius, with a small contribution from Staph. epidermidis. The presence of further unidentified species of ureolytic oral bacteria need not be invoked.
journal_name
Arch Oral Bioljournal_title
Archives of oral biologyauthors
Sissons CH,Hancock EM,Perinpanayagam HE,Cutress TWdoi
10.1016/0003-9969(88)90006-4subject
Has Abstractpub_date
1988-01-01 00:00:00pages
727-33issue
10eissn
0003-9969issn
1879-1506pii
0003-9969(88)90006-4journal_volume
33pub_type
杂志文章abstract：OBJECTIVE:Accumulating evidence suggests an association between periodontitis and several systemic diseases, such as atherosclerosis. In the lesions of these diseases, nucleotide-binding domain leucine-rich repeat-containing protein 3 (NLRP3), apoptosis-associated speck-like protein containing a caspase activation and ...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2019.104625
更新日期：2020-02-01 00:00:00
abstract：:The development of fatigue was investigated by electrical stimulation in 15 domestic pigs (1 yr old, 70-90 kg body weight) and seven adult dogs (3 yr old, 45 kg body weight). After anaesthesia, silver electrodes were implanted in the anterior and posterior parts of the right masseter muscles. The contralateral muscle ...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(92)90031-3
更新日期：1992-12-01 00:00:00
abstract：OBJECTIVE:This study aimed to compare the behavior of dental pulp stem cells (DPSCs) after isolation using solutions containing either collagenase/dispase or collagenase alone. DESIGN:DPSCs were isolated by two digestion methods (collagenase/dispase or collagenase alone) from human third molars. Immunophenotypic featu...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2018.05.008
更新日期：2018-09-01 00:00:00
abstract：OBJECTIVES:The aim of this study was to determine whether measurements of volatile sulfur compounds (VSCs) are useful to predict colonization of periodontopathic bacteria. For this purpose, we assessed the relationships among distributions of 4 species of periodontopathic bacteria in tongue coating and dental plaque, o...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2012.09.019
更新日期：2013-03-01 00:00:00
abstract：:Transmission electron microscopy showed that when either dentinal phosphoprotein or calcium-treated phosphoprotein or phosvitin were introduced during type I collagen fibrillogenesis the fibrils formed were significantly wider and the cross-banding was more distinct than in the absence of phosphoprotein. The collagen ...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(93)90068-w
更新日期：1993-09-01 00:00:00
abstract：:Fibronectin (FN) with an immunohistochemical fluorescence technique using anti-human FN and anti-rat FN sera was localized in the basement membrane of lip, buccal mucosa, palate, tongue, around ectopic sebaceous glands and around acini and ducts of labial salivary glands though in different amounts. In the mucosal lam...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(82)90010-3
更新日期：1982-01-01 00:00:00
abstract：:Platelet-activating factor (1-O-alkyl-2-acetyl-sn-glycero-3-phosphocholine; PAF) is a biologically active lipid, like the prostaglandins, which mediates allergic and inflammatory reactions. Aggregation of washed rabbit platelets was induced by a lipid prepared from inflamed gingiva. The mobility of the active lipid wa...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(89)90044-7
更新日期：1989-01-01 00:00:00
abstract：:Twenty-nine parotids ligated for between 1 and 365 days were examined by light and electron microscopy. Major changes in the acini were seen at 4 days and included vacuolation, disintegration, extravasation, apoptosis, phagy and a reduction in number and size of secretory granules. There was a further reduction in sec...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/s0003-9969(00)00076-5
更新日期：2000-11-01 00:00:00
abstract：:Daily intravenous administration of 50 mg/kg cyclosporin A (CsA), after excision of cheek pouch tumors induced with 9,10-dimethyl-1,2-benzanthracene (DMBA), enhanced the incidence of cervical lymph node metastasis to 93%, a significant increase over the rates observed for animals receiving a dosage of 25 mg/kg (43%), ...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(92)90143-v
更新日期：1992-01-01 00:00:00
abstract：:In a previous study, it was shown that tooth germs of neonatal homozygous parathyroid hormone-related protein (PTHrP)-knockout mice are penetrated or compressed by the surrounding alveolar bone, suggesting an important role for PTHrP in the formation and activation of osteoclasts around growing tooth germs. In order t...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/s0003-9969(02)00026-2
更新日期：2002-09-01 00:00:00
abstract：:Thirty-one teeth taken post-mortem from 10 subjects aged from 40 to 66 years were studied. A close relationship was found between fluoride (F) distribution and histological structure. Although, as in all mineralized tissues, F concentrations tended to be highest towards the external surface, individual patterns of F d...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(88)90187-2
更新日期：1988-01-01 00:00:00
abstract：:The distribution of substance P (SP)-containing synaptic terminals in the hypoglossal nucleus (XII) of adult rats was examined by retrograde peroxidase labelling and immunocytochemistry. From the location of peroxidase injections into the tongue and of labelled neurones in the ventral lamina of XII, motor neurones tha...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/s0003-9969(99)00040-0
更新日期：1999-08-01 00:00:00
abstract：:Twenty-eight right-handed, young adults participated in a sensory testing experiment to evaluate spatial resolution at 10 positionally matched sites on the right- and left-hand sides of the face. An adaptive psychophysical (i.e. tracking) procedure was used to estimate the threshold spatial separation for perceiving t...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(94)00202-m
更新日期：1995-06-01 00:00:00
abstract：:A phenotypic study had shown that gingival B cells respond differently to two periodontopathic bacteria, Porphyromonas gingivalis and Fusobacterium nucleatum. Further investigation now shows a reduction in the percentage of Ki-67 + T cells in cultures of gingival and peripheral blood mononuclear cells stimulated with ...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(92)90139-y
更新日期：1992-01-01 00:00:00
abstract：:Cell migration and replication associated with odontoblast replacement occurring soon after pulp exposure in primate teeth were studied. Class 5 cavity preparations resulting in pulp exposures were restored with a calcium hydroxide-containing capping agent and amalgam. Eighty-four and 96 h after this the animals were ...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(90)90093-p
更新日期：1990-01-01 00:00:00
abstract：OBJECTIVE:To evaluate the expression of the cytokines IFN-γ, IL-1β, IL-4, IL-6, IL-10, IL-21, IL-22, IL-23, IL-25, IL-31, IL-33, IL-17A, IL-17F, sCD40L, and TNF-α in gingival tissue and intestinal mucosa of patients having both periodontitis and inflammatory bowel disease (IBD) and assess how they cluster in both tissu...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2016.02.018
更新日期：2016-06-01 00:00:00
abstract：:Normal function of the lateral pterygoid muscle is not well understood. The principal aim of this study was to determine whether there is a progressive decrease in lateral pterygoid activity as the condyle moves posteriorly and superiorly during the return phase of a contralateral or protrusive jaw movement, as would ...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/s0003-9969(00)00011-x
更新日期：2000-06-01 00:00:00
abstract：OBJECTIVE:The objective was to determine the antibiofilm efficacy of Cymbopogon martinii and Thymus zygis essential oils and to estimate the disruption potential of oil-based endodontic irrigants on the multispecies biofilm formed in the root canals of extracted teeth. DESIGN:The essential oils were characterized (GC-...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2020.104842
更新日期：2020-09-01 00:00:00
abstract：OBJECTIVES:Human β-defensin 1 (hBD-1) is an antimicrobial peptide involved in epithelial defence of various tissues, also present in the saliva. Individual genetic variations within the DEFB1 gene, encoding for hBD-1, could influence gene expression and protein production. DESIGN:Three DEFB1 polymorphisms at 5' untran...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2015.03.009
更新日期：2015-07-01 00:00:00
abstract：OBJECTIVES:The aim of the present study was to identify the anticancer effects and the mechanisms of action of shikonin and its analogue isobutyrylshikonin in oral squamous carcinoma cells. DESIGNS:The cytotoxic effects of isobutyrylshikonin and shikonin in Ca9-22 and SCC-25 cells were analyzed using 3-(4,5-dimethylth...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2020.104774
更新日期：2020-08-01 00:00:00
abstract：INTRODUCTION:Intact neural supply is necessary for tooth eruption. Sympathetic denervation accelerates or decelerates the eruption rate depending on the tooth condition (intact or injured). The aim of this study is to reexamine the role of the sympathetic innervation, through the observation of the effects of pre or po...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2018.02.003
更新日期：2018-05-01 00:00:00
abstract：OBJECTIVE:This study aimed to examine and compare the anti-caries effects of citrus lemon oil (CLO) and limonene in rats. METHODS:The minimal inhibitory concentrations of CLO and limonene were measured using the disk diffusion method. The rats were infected with Streptococcus sobrinus and assigned into four groups: (1...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2020.104851
更新日期：2020-10-01 00:00:00
abstract：OBJECTIVE:The radical anion of oxygen (O(-)) is extremely oxidative and shows high reactivity. In this study, the antibacterial activity of water super-oxidised water containing high concentration of O(-) (O(-)-water) was tested against cultured planktonic cells of cariogenic bacteria, periodontopathic bacteria and Can...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2010.03.002
更新日期：2010-06-01 00:00:00
abstract：:Medications commonly used in elderly people cause hyposalivation and are associated with an enhanced prevalence of dental caries. Propranolol (a beta-adrenergic antagonist) is a commonly used antihypertensive agent that is prescribed for long-term use. The purpose of this investigation was to compare the effects of th...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(93)90094-3
更新日期：1993-10-01 00:00:00
abstract：:There is growing evidence that the insulin-like growth factor (IGF) system plays an important role in the biology of oro-dento-facial tissues and organs, including the development, homeostasis and regeneration of the periodontium. To obtain basic data on the occurrence and distribution of IGF components in human perma...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2005.10.005
更新日期：2006-05-01 00:00:00
abstract：:Simultaneous recordings of the activity of the masseter and anterior temporalis and of jaw movement were made on 10 healthy dentate volunteers while they chewed roasted peanuts in their habitual manner. The quantity of food taken was altered by varying (a) its total weight (mouthful) between 8 and 1 g, but with a fixe...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(91)90120-j
更新日期：1991-01-01 00:00:00
abstract：:Streptococcus mutans GS5, Lactobacillus casei DSM20011 and Actinomyces viscosus T14 produce artificial caries in the roots of extracted teeth. Roots were coated with wax leaving an 8 mm2 window exposed on the buccal surfaces, and then incubated for 8 days in the presence of the test organism, the synthetic medium bein...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(88)90031-3
更新日期：1988-01-01 00:00:00
abstract：:By comparing the results of force matching between the jaw and the thumbs, whether subjects have any knowledge about the magnitude of exerted forces irrespective of the motor system was studied. Subjects were asked to match isometric forces of their own choice exerted by flexion of one of the thumbs with the jaw, and ...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(92)90111-k
更新日期：1992-10-01 00:00:00
abstract：OBJECTIVES:Dental evolution affects the geometry of the tooth, but the adaptive relevance of these changes is related to tooth sharpness, complexity, and relief (topography). On a set of laboratory mice, we assessed how wear related to age and food consistency affected molar geometry and topography. DESIGN:Three group...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2017.04.028
更新日期：2017-09-01 00:00:00
abstract：:Although the inactivation or removal of motoneurones and muscles are known to affect development and growth of the craniofacial skeleton and masticatory muscles, the effect of these on functional activity patterns is not clear. The goal of this study was to evaluate the immediate responses of masticatory muscle activi...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(93)90135-9
更新日期：1993-04-01 00:00:00
