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Genetic Contributions to The Association Between Adult Height and Head and Neck Cancer: A Mendelian Randomization Analysis. Sci Rep 2018; 8:4534. [PMID: 29540730 PMCID: PMC5852094 DOI: 10.1038/s41598-018-22626-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 02/19/2018] [Indexed: 01/02/2023] Open
Abstract
With the aim to dissect the effect of adult height on head and neck cancer (HNC), we use the Mendelian randomization (MR) approach to test the association between genetic instruments for height and the risk of HNC. 599 single nucleotide polymorphisms (SNPs) were identified as genetic instruments for height, accounting for 16% of the phenotypic variation. Genetic data concerning HNC cases and controls were obtained from a genome-wide association study. Summary statistics for genetic association were used in complementary MR approaches: the weighted genetic risk score (GRS) and the inverse-variance weighted (IVW). MR-Egger regression was used for sensitivity analysis and pleiotropy evaluation. From the GRS analysis, one standard deviation (SD) higher height (6.9 cm; due to genetic predisposition across 599 SNPs) raised the risk for HNC (Odds ratio (OR), 1.14; 95% Confidence Interval (95%CI), 0.99-1.32). The association analyses with potential confounders revealed that the GRS was associated with tobacco smoking (OR = 0.80, 95% CI (0.69-0.93)). MR-Egger regression did not provide evidence of overall directional pleiotropy. Our study indicates that height is potentially associated with HNC risk. However, the reported risk could be underestimated since, at the genetic level, height emerged to be inversely associated with smoking.
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A rare truncating BRCA2 variant and genetic susceptibility to upper aerodigestive tract cancer. J Natl Cancer Inst 2015; 107:djv037. [PMID: 25838448 PMCID: PMC4822523 DOI: 10.1093/jnci/djv037] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 09/05/2014] [Accepted: 01/29/2015] [Indexed: 01/07/2023] Open
Abstract
Deleterious BRCA2 genetic variants markedly increase risk of developing breast cancer. A rare truncating BRCA2 genetic variant, rs11571833 (K3326X), has been associated with a 2.5-fold risk of lung squamous cell carcinoma but only a modest 26% increase in breast cancer risk. We analyzed the association between BRCA2 SNP rs11571833 and upper aerodigestive tract (UADT) cancer risk with multivariable unconditional logistic regression adjusted by sex and combinations of study and country for 5942 UADT squamous cell carcinoma case patients and 8086 control patients from nine different studies. All statistical tests were two-sided. rs11571833 was associated with UADT cancers (odds ratio = 2.53, 95% confidence interval = 1.89 to 3.38, P = 3x10(-10)) and was present in European, Latin American, and Indian populations but extremely rare in Japanese populations. The association appeared more apparent in smokers (current or former) compared with never smokers (P het = .026). A robust association between a truncating BRCA2 variant and UADT cancer risk suggests that treatment strategies orientated towards BRCA2 mutations may warrant further investigation in UADT tumors.
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The 12p13.33/RAD52 locus and genetic susceptibility to squamous cell cancers of upper aerodigestive tract. PLoS One 2015; 10:e0117639. [PMID: 25793373 PMCID: PMC4368781 DOI: 10.1371/journal.pone.0117639] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 12/29/2014] [Indexed: 11/18/2022] Open
Abstract
Genetic variants located within the 12p13.33/RAD52 locus have been associated with lung squamous cell carcinoma (LUSC). Here, within 5,947 UADT cancers and 7,789 controls from 9 different studies, we found rs10849605, a common intronic variant in RAD52, to be also associated with upper aerodigestive tract (UADT) squamous cell carcinoma cases (OR = 1.09, 95% CI: 1.04-1.15, p = 6x10(-4)). We additionally identified rs10849605 as a RAD52 cis-eQTL inUADT(p = 1x10(-3)) and LUSC (p = 9x10(-4)) tumours, with the UADT/LUSC risk allele correlated with increased RAD52 expression levels. The 12p13.33 locus, encompassing rs10849605/RAD52, was identified as a significant somatic focal copy number amplification in UADT(n = 374, q-value = 0.075) and LUSC (n = 464, q-value = 0.007) tumors and correlated with higher RAD52 tumor expression levels (p = 6x10(-48) and p = 3x10(-29) in UADT and LUSC, respectively). In combination, these results implicate increased RAD52 expression in both genetic susceptibility and tumorigenesis of UADT and LUSC tumors.
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Using prior information from the medical literature in GWAS of oral cancer identifies novel susceptibility variant on chromosome 4--the AdAPT method. PLoS One 2012; 7:e36888. [PMID: 22662130 PMCID: PMC3360735 DOI: 10.1371/journal.pone.0036888] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Accepted: 04/09/2012] [Indexed: 11/18/2022] Open
Abstract
Background Genome-wide association studies (GWAS) require large sample sizes to obtain adequate statistical power, but it may be possible to increase the power by incorporating complementary data. In this study we investigated the feasibility of automatically retrieving information from the medical literature and leveraging this information in GWAS. Methods We developed a method that searches through PubMed abstracts for pre-assigned keywords and key concepts, and uses this information to assign prior probabilities of association for each single nucleotide polymorphism (SNP) with the phenotype of interest - the Adjusting Association Priors with Text (AdAPT) method. Association results from a GWAS can subsequently be ranked in the context of these priors using the Bayes False Discovery Probability (BFDP) framework. We initially tested AdAPT by comparing rankings of known susceptibility alleles in a previous lung cancer GWAS, and subsequently applied it in a two-phase GWAS of oral cancer. Results Known lung cancer susceptibility SNPs were consistently ranked higher by AdAPT BFDPs than by p-values. In the oral cancer GWAS, we sought to replicate the top five SNPs as ranked by AdAPT BFDPs, of which rs991316, located in the ADH gene region of 4q23, displayed a statistically significant association with oral cancer risk in the replication phase (per-rare-allele log additive p-value [ptrend] = 2.5×10−3). The combined OR for having one additional rare allele was 0.83 (95% CI: 0.76–0.90), and this association was independent of previously identified susceptibility SNPs that are associated with overall UADT cancer in this gene region. We also investigated if rs991316 was associated with other cancers of the upper aerodigestive tract (UADT), but no additional association signal was found. Conclusion This study highlights the potential utility of systematically incorporating prior knowledge from the medical literature in genome-wide analyses using the AdAPT methodology. AdAPT is available online (url: http://services.gate.ac.uk/lld/gwas/service/config).
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Role of medical history and medication use in the aetiology of upper aerodigestive tract cancers in Europe: the ARCAGE study. Ann Oncol 2011; 23:1053-60. [PMID: 21828376 DOI: 10.1093/annonc/mdr335] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND The study aimed to investigate the role of medical history (skin warts, Candida albicans, herpetic lesions, heartburn, regurgitation) and medication use (for heartburn; for regurgitation; aspirin) in the aetiology of upper aerodigestive tract (UADT) cancer. METHODS A multicentre (10 European countries) case-control study [Alcohol-Related CAncers and GEnetic susceptibility (ARCAGE) project]. RESULTS There were 1779 cases of UADT cancer and 1993 controls. History of warts or C. albicans infection was associated with a reduced risk [odds ratio (OR) 0.80, 95% confidence interval (CI) 0.68-0.94 and OR 0.73, 95% CI 0.60-0.89, respectively] but there was no association with herpetic lesions, heartburn, regurgitation or medication for related symptoms. Regurgitation was associated with an increased risk for cancer of the oesophagus (OR 1.47, 95% CI 0.98-2.21). Regular aspirin use was not associated with risk of UADT cancer overall but was associated with a reduced risk for cancer of oesophagus (OR 0.51, 95% CI 0.28-0.96), hypopharynx (OR 0.53, 95% CI 0.28-1.02) and larynx (OR 0.74, 95% CI 0.54-1.01). CONCLUSIONS A history of some infections appears to be a marker for decreased risk of UADT cancer. The role of medical history and medication use varied by UADT subsites with aspirin use associated with a decreased risk of oesophageal cancer and suggestive of a decreased risk of hypopharyngeal and laryngeal cancers.
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A sex-specific association between a 15q25 variant and upper aerodigestive tract cancers. Cancer Epidemiol Biomarkers Prev 2011; 20:658-64. [PMID: 21335511 PMCID: PMC3070066 DOI: 10.1158/1055-9965.epi-10-1008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Sequence variants located at 15q25 have been associated with lung cancer and propensity to smoke. We recently reported an association between rs16969968 and risk of upper aerodigestive tract (UADT) cancers (oral cavity, oropharynx, hypopharynx, larynx, and esophagus) in women (OR = 1.24, P = 0.003) with little effect in men (OR = 1.04, P = 0.35). METHODS In a coordinated genotyping study within the International Head and Neck Cancer Epidemiology (INHANCE) consortium, we have sought to replicate these findings in an additional 4,604 cases and 6,239 controls from 10 independent UADT cancer case-control studies. RESULTS rs16969968 was again associated with UADT cancers in women (OR = 1.21, 95% CI = 1.08-1.36, P = 0.001) and a similar lack of observed effect in men [OR = 1.02, 95% CI = 0.95-1.09, P = 0.66; P-heterogeneity (P(het)) = 0.01]. In a pooled analysis of the original and current studies, totaling 8,572 UADT cancer cases and 11,558 controls, the association was observed among females (OR = 1.22, 95% CI = 1.12-1.34, P = 7 × 10(-6)) but not males (OR = 1.02, 95% CI = 0.97-1.08, P = 0.35; P(het) = 6 × 10(-4)). There was little evidence for a sex difference in the association between this variant and cigarettes smoked per day, with male and female rs16969968 variant carriers smoking approximately the same amount more in the 11,991 ever smokers in the pooled analysis of the 14 studies (P(het) = 0.86). CONCLUSIONS This study has confirmed a sex difference in the association between the 15q25 variant rs16969968 and UADT cancers. IMPACT Further research is warranted to elucidate the mechanisms underlying these observations.
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Opinions and attitudes of the UK's GDPs and specialists in oral surgery, oral medicine and surgical dentistry on oral cancer screening. Oral Dis 2006; 12:194-9. [PMID: 16476043 DOI: 10.1111/j.1601-0825.2005.01188.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To survey two broad areas of oral cancer awareness and management of patients at risk of oral cancer by specialists in oral surgery, oral medicine, surgical dentistry and general dental practitioners (GDPs) in the UK. The first of these included knowledge and awareness of aetiological factors, changing patterns of disease, and screening/detection programmes including their effectiveness. The second included oral cancer detection methods, advice on avoidance of high-risk activity and self-examination, and referral pattern of GDPs. DESIGN AND METHOD A pretested, 44-item questionnaire, a covering letter, a brief outline of the research protocol and return, stamped envelope were mailed in March 2003. A sample of 200 GDPs whose names were obtained from the General Dental Council's main list and 305 dental specialist names obtained from specialist's list in surgical dentistry, oral medicine and oral surgery were selected randomly. Information on oral cancer awareness and practice, screening practice and education was obtained. RESULTS The response rate was 66.9%. The knowledge of the dental specialists was consistent with that in reports of current aetiological studies on oral cancer. However there were gaps in the GDP's knowledge and ascertainment of oral cancer risk factors. Over 70% of the dental specialists provided counselling advice on the risks of tobacco and alcohol habits compared with 41.2% of GDPs. More GDPs (52.4%) than specialists (35.4%) believed that oral cancer screening on a national basis would be effective in decreasing the mortality of oral cancer. Over 95% of all respondents used a visual examination for oral cancer screening and 89.9% of all respondents strongly believed that visual screening is effective in the early detection of oral cancer. CONCLUSION The results showed that GDPs had knowledge gaps in their awareness of oral cancer risk factors and the application of preventive measures. Most dental health providers in the UK perform visual screening of the oral mucosa for their patients. Opinion was equivocal as to whether a nationally based screening programme similar to cervical cancer would be effective in improving the mortality and morbidity of oral cancer.
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Coinheritance of two rare genodermatoses (Papillon-Lefèvre syndrome and oculocutaneous albinism type 1) in two families: a genetic study. Br J Dermatol 2005; 151:1261-5. [PMID: 15606524 DOI: 10.1111/j.1365-2133.2004.06237.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The co-occurrence of two rare recessive genetic conditions in apparently unrelated individuals or families is extremely rare. Two geographically distant and apparently unrelated families were identified in which individuals were simultaneously affected by two rare recessive mendelian syndromes, Papillon-Lefevre syndrome and type 1 oculocutaneous albinism. The families were tested for mutations in the causative genes, cathepsin C (CTSC) and tyrosinase (TYR), respectively, by direct sequencing. To assess the relationship of the two families, both families were tested for polymorphisms at eight microsatellite markers spanning both CTSC and TYR loci. Independent mutations (c.318-1G-->A and c.817G-->C/p.W272C) were identified in CTSC and TYR, respectively, that were shared by the affected individuals in both families. The two affected genes lie close together on chromosome bands 11q14.2-14.3, and studies with linked genetic markers suggested that the families shared a small chromosomal segment carrying both mutations that had been transmitted intact from a remote common ancestor. The co-occurrence of the two rare diseases in multiple families depends on their shared chromosomal location, but not on any shared pathogenic mechanism.
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Prognostic value of facilitative glucose transporter Glut-1 in oral squamous cell carcinomas treated by surgical resection. Eur J Cancer 2004; 40:503-7. [PMID: 14962715 DOI: 10.1016/j.ejca.2003.10.024] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2003] [Revised: 08/30/2003] [Accepted: 10/28/2003] [Indexed: 11/19/2022]
Abstract
Hypoxia in tumours of the oral cavity has not been extensively investigated with regard to clinical outcome and prognosis. The expression of the facilitative glucose transporter, Glut-1, has been shown to be related to hypoxia in tumours at other sites. The aim of the present study was to investigate the relationship between Glut-1 expression and clinical outcome in a series of oral squamous cell carcinomas. A retrospective series of 54 cases of oral squamous cell carcinomas with known clinical outcome and treated by one surgeon over a period of 6 years was used in the study. A representative section from each case was stained immunohistochemically with an antibody against Glut-1. The stained sections were then assessed independently by two observers using a semi-quantitative method. The relationship between these results and the clinical outcomes of local recurrence, regional lymph-node metastasis and disease-free survival were examined. Glut-1 staining was observed in most of the tissue specimens and all of the few sections with demonstrably necrotic areas histologically. Some showed more prominent staining in the epithelial islands of the tumour than others. However, the intensity of staining was variable. There was a significant relationship between those tumours which demonstrated intense staining and recurrence overall (chi(2)=6.18, P=0.032). This relationship was strongest in relation to regional lymph-node recurrence (chi(2)=10.19, P=0.005). A significant relationship between disease-related death and intense Glut-1 staining was also observed (chi(2)=11.67, P=0.002). In conclusion, the results of this study indicate a relationship between Glut-1 expression and disease progression of oral cancer and could indicate a need for neoadjuvant chemoradiotherapy for those tumours demonstrating intense Glut-1 expression.
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Abstract
This paper examines the genetic defects associated with inherited cancer syndromes and their relevance to oral cancer. Tumour suppressor genes are now thought of as either gatekeepers or caretakers according to whether they control cell growth directly by inhibiting cell proliferation and/or promoting cell death (gatekeepers) or whether they maintain the integrity of the genome by DNA repair mechanisms (caretakers). In disorders such as xeroderma pigmentosum, ataxia telangiectasia, Bloom syndrome and Fanconi's anaemia, where there are defective caretaker genes, there is an increased incidence of second primary malignancies, including oral cancer. By contrast, with the exception of Li Fraumeni syndrome, abnormalities of gatekeeper genes do not predispose to oral cancer. Not only do Li Fraumeni patients develop second primary malignancies, but defects of the p53 pathway (p53 mutation, MDM2 over-expression, CDKN2A deletion) appear to be a ubiquitous feature of sporadic oral cancer as it occurs in the West. The findings suggest that genetic instability is of fundamental importance in the pathogenesis of oral cancer.
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Oral lichenoid lesions after hepatitis B vaccination. ORAL SURGERY, ORAL MEDICINE, ORAL PATHOLOGY, ORAL RADIOLOGY, AND ENDODONTICS 2000; 89:717-9. [PMID: 10846126 DOI: 10.1067/moe.2000.104541] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The association of mucocutaneous lichen planus and chronic liver disease is widely recognized. The hepatitis B and C viruses have been implicated as being important in this association, although their exact role remains unclear. Recently, lichenoid lesions of the skin after a hepatitis B vaccination have also been reported. In this case, a woman of Southeast Asian origin had lichenoid lesions affecting the oral mucous membranes develop after she was vaccinated against hepatitis B. The lesions appeared 3 weeks after the administration of the third dose of the vaccine and persisted for about 1 year. As the use of the hepatitis B vaccine becomes more widespread, more such cases can be expected to be encountered.
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Loss-of-function mutations in the cathepsin C gene result in periodontal disease and palmoplantar keratosis. Nat Genet 1999; 23:421-4. [PMID: 10581027 DOI: 10.1038/70525] [Citation(s) in RCA: 336] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Papillon-Lefèvre syndrome, or keratosis palmoplantaris with periodontopathia (PLS, MIM 245000), is an autosomal recessive disorder that is mainly ascertained by dentists because of the severe periodontitis that afflicts patients. Both the deciduous and permanent dentitions are affected, resulting in premature tooth loss. Palmoplantar keratosis, varying from mild psoriasiform scaly skin to overt hyperkeratosis, typically develops within the first three years of life. Keratosis also affects other sites such as elbows and knees. Most PLS patients display both periodontitis and hyperkeratosis. Some patients have only palmoplantar keratosis or periodontitis, and in rare individuals the periodontitis is mild and of late onset. The PLS locus has been mapped to chromosome 11q14-q21 (refs 7, 8, 9). Using homozygosity mapping in eight small consanguineous families, we have narrowed the candidate region to a 1.2-cM interval between D11S4082 and D11S931. The gene (CTSC) encoding the lysosomal protease cathepsin C (or dipeptidyl aminopeptidase I) lies within this interval. We defined the genomic structure of CTSC and found mutations in all eight families. In two of these families we used a functional assay to demonstrate an almost total loss of cathepsin C activity in PLS patients and reduced activity in obligate carriers.
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Bizarre parosteal osteochondromatous proliferation in the anterior maxilla: report of a case. ORAL SURGERY, ORAL MEDICINE, ORAL PATHOLOGY, ORAL RADIOLOGY, AND ENDODONTICS 1999; 87:351-6. [PMID: 10102599 DOI: 10.1016/s1079-2104(99)70222-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Bizarre parosteal osteochondromatous proliferations are a rare subgroup of the osteochondromatous lesions. They must be differentiated from reactive osteochondromatous proliferations, low grade parosteal osteogenic sarcoma, and chondrosarcoma. Their recognition is important from the point of view of management, which should be by simple excision. This article describes a case of bizarre parosteal osteochondromatous proliferation in a 2-year-old child; the lesion developed in the anterior maxilla, a previously unreported site.
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Local research ethics committee approval for a national study in Scotland. JOURNAL OF THE ROYAL COLLEGE OF SURGEONS OF EDINBURGH 1998; 43:303-5. [PMID: 9803097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
The handling of research proposals by different ethics committees has been reported as varying widely from one district to another. Multicentre research projects are particularly liable to delay when dealing with several individual committees. We recently performed a nation-wide postal questionnaire study in Scotland on young patients with oral or oropharyngeal cancer. Our experience indicates that despite calls for standardization of the processes involved wide variations still exist between committees. Fifteen out of 19 committees approached had unique application forms, the number of copies of forms and other documentation required ranged from one to 20, and the time to final approval ranged from 39 to 182 days (mean of 90 days). Improved training and a standardized constitution of committee members is required. A uniform national application form and improved co-operation between neighbouring committees is needed.
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Abstract
The potentiation of the anticoagulant effects of warfarin by miconazole, when used in oral gel form, is described in three patients. The associated morbidity is examined, emphasising the importance of considering this potentially serious interaction when prescribing antifungal agents to patients on oral anticoagulants.
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Treating oral candidiasis: potentially fatal. Br Dent J 1997; 183:87. [PMID: 9282448 DOI: 10.1038/sj.bdj.4809429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Potentiation of warfarin anticoagulant activity by miconazole oral gel. BMJ (CLINICAL RESEARCH ED.) 1997; 314:349. [PMID: 9040331 PMCID: PMC2125823 DOI: 10.1136/bmj.314.7077.349a] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Florid oral manifestations in an atypical familial adenomatous polyposis family with late presentation of colorectal polyps. J Oral Pathol Med 1996; 25:459-62. [PMID: 8930826 DOI: 10.1111/j.1600-0714.1996.tb00297.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Early identification and prophylactic surgery are essential in preventing development of malignancy in colorectal polyps in familial adenomatous polyposis (FAP). Previous studies indicate a 100% cumulative risk of developing colonic polyps in individuals with FAP by the age of 34 yr. However, we have previously reported late-onset and non-penetrance of polyposis in four families. We describe here in detail one of these families with florid oral manifestations detectable on panoramic radiography of the jaws, which were instrumental in the diagnosis of FAP in the index patient and for ascertainment of her family for screening. The pathological adenomatous polyposis coli (APC) gene mutation in this family was shown to segregate with dento-osseous changes. Panoramic jaw radiography is a common examination carried out prior to dental or oral surgical procedures. This case illustrates the importance of appropriate investigations, including family history and colonoscopy, even in relatively older patients with radiological findings such as those described here and in members of their families at risk of FAP.
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Medical genetics: advances in brief: C. elegans cell survival gene ced-9 encodes a functional homologue of the mammalian proto-oncogene bcl-2. J Med Genet 1994. [DOI: 10.1136/jmg.31.7.583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Medical genetics: advances in brief: A mutation in the homeodomain of the human MSX2 gene in a family affected with autosomal dominant craniosynostosis. J Med Genet 1994. [DOI: 10.1136/jmg.31.2.176-d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Medical genetics: advances in brief: Adenovirus-mediated gene transfer transiently corrects the chloride transport defect in nasal epithelia of patients with cystic fibrosis. J Med Genet 1994. [DOI: 10.1136/jmg.31.2.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Medical genetics: advances in brief. J Med Genet 1993. [DOI: 10.1136/jmg.30.10.885-d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Medical genetics: advances in brief. J Med Genet 1993. [DOI: 10.1136/jmg.30.10.885-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Medical genetics: advances in brief: Medical genetics: advances in brief. J Med Genet 1993. [DOI: 10.1136/jmg.30.8.707-b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Medical genetics: advances in brief: A novel meosin-, ezrin-, radixin-like gene is a candidate for the neurofibromatosis 2 tumour suppressor. J Med Genet 1993. [DOI: 10.1136/jmg.30.7.620-c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Medical genetics: advances in brief: Expression of Xist during mouse development suggests a role in the initiation of X chromosome inactivation. J Med Genet 1993. [DOI: 10.1136/jmg.30.6.532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Medical genetics: advances in brief: ERCC6, a member of a subfamily of putative helicases, is involved in Cockayne's syndrome and preferential repair of active genes. J Med Genet 1993. [DOI: 10.1136/jmg.30.5.443-b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Medical genetics: advances in brief: A mammalian cell cycle checkpoint utilizing p53 and GADD45 is defective in ataxia-telangiectasia. J Med Genet 1993. [DOI: 10.1136/jmg.30.4.349-d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Medical genetics: advances in brief: Molecular basis of human hypertension: the role of angiotensinogen. J Med Genet 1993. [DOI: 10.1136/jmg.30.3.261-c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Medical genetics: advances in brief. J Med Genet 1993. [DOI: 10.1136/jmg.30.1.85-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Medical genetics: advances in brief: Integration of human -satellite DNA into simian chromosomes: centromere protein binding and disruption of normal chromosome segregation. J Med Genet 1992. [DOI: 10.1136/jmg.29.12.927-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Medical genetics: advances in brief. J Med Genet 1992. [DOI: 10.1136/jmg.29.11.839-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Medical genetics: advances in brief: Nucleoside triphosphates are required to open the CFTR chloride channel. J Med Genet 1992. [DOI: 10.1136/jmg.29.11.839-d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Medical genetics: advances in brief: Mutations in the DNA ligase I gene of an individual with immunodeficiencies and cellular hypersensitivity to DNA-damaging agents. J Med Genet 1992. [DOI: 10.1136/jmg.29.10.756-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Medical genetics: advances in brief: Of mice and men: genetic skin diseases of keratin. J Med Genet 1992. [DOI: 10.1136/jmg.29.10.757-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Medical genetics: advances in brief: Abnormal regulation of mammalian p21ras contributes to malignant tumour growth in von Recklinghausen (type 1) neurofibromatosis. J Med Genet 1992. [DOI: 10.1136/jmg.29.9.678-c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Medical genetics: advances in brief: In vivo transfer of the human cystic fibrosis transmembrane conductance regulator gene to the airway epithelium. J Med Genet 1992. [DOI: 10.1136/jmg.29.6.439-d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Medical genetics: advances in brief. J Med Genet 1992. [DOI: 10.1136/jmg.29.5.356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Medical genetics: advances in brief: Nucleoside triphosphates are required to open the CFTR chloride channel. J Med Genet 1992. [DOI: 10.1136/jmg.29.4.286-c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Comments on important genetic topics from papers in other journals: Genetic mapping of a gene causing hypertension in the stroke-prone spontaneously hypertensive rat. J Med Genet 1992. [DOI: 10.1136/jmg.29.2.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Abstract
A double-blind, five phase, cross-over clinical trial was used to compare a mucin-based artificial saliva (Saliva Orthana) with its non-mucin base and water. Thirty patients, acting as their own controls, took part. Saliva Orthana offered significantly greater relief from xerostomia compared with its base or water, and was significantly better at relieving soreness than water. In terms of overall preference, it was ranked significantly higher than either alternative.
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