Abstract:
AIMS/BACKGROUND:Telomerase, an enzyme associated with cellular immortality, is expressed by most malignant tumours, but is inactive in normal somatic cells except for male germ cells and proliferating stem cells. Thus, the measurement of telomerase activity in tissue samples may provide useful diagnostic and prognostic information. The aim of this study was to determine whether telomerase expression is useful for the detection of occult malignant cells in lymph nodes. METHODS:Telomerase activity was compared with histological findings in 123 surgically removed lymph nodes submitted for routine or frozen section diagnosis. Telomerase activity was measured using a modified, semi-quantitative PCR-based telomeric repeat amplification protocol (TRAP). The assay was adapted for single 5 microns OCT embedded cryostat sections. In either fresh tissues or cryostat sections, normalised activity was linear when compared with protein concentration. Furthermore, using an in situ hybridisation method, the human telomerase RNA (hTR) component was measured in a subset of negative and positive nodes. RESULTS:Most (96%) of the 97 histologically negative nodes expressed low levels of activity (mean value of positive samples = 3.0 units/microgram protein) which may be derived from activated lymphocytes that express telomerase activity. All 26 malignant nodes (17 metastases, nine lymphomas) expressed telomerase (mean value = 17.8 units/microgram protein). The rank order levels between the two groups differed significantly (p = 0.0002). In situ results showed clearly that the hTR was expressed relatively highly in metastatic cancer cells and at lower levels in germinal centres of secondary follicles. CONCLUSIONS:Although expression of telomerase by activated lymphocytes may limit its usefulness, measurement of enzyme activity combined with detection of hTR using in situ hybridisation may assist in the histopathological diagnosis of lymph nodes.
journal_name
J Clin Patholjournal_title
Journal of clinical pathologyauthors
Yashima K,Piatyszek MA,Saboorian HM,Virmani AK,Brown D,Shay JW,Gazdar AFdoi
10.1136/jcp.50.2.110subject
Has Abstractpub_date
1997-02-01 00:00:00pages
110-7issue
2eissn
0021-9746issn
1472-4146journal_volume
50pub_type
杂志文章abstract::We determined the relative strengths of association between 23 most commonly ordered laboratory tests and the adverse outcome as indicators of relative criticalness. The lowest and highest results for 23 most commonly ordered laboratory tests, 24 hours prior to death during critical care unit (CCU) stay or discharge f...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jclinpath-2018-205549
更新日期:2019-04-01 00:00:00
abstract:AIMS:To study the overexpression of p53 protein in Barrett's oesophagus with adenocarcinoma, and to correlate this expression with the pathological features of Barrett's syndrome. METHODS:Immunohistochemical staining was performed on frozen sections with a monoclonal antibody directed against wild type and mutated p53...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.46.4.330
更新日期:1993-04-01 00:00:00
abstract::The 24-hour urinary excretion of cyclic 3',5'-adenosine monophosphate (cAMP) was measured by a protein-binding assay in 55 healthy volunteers (aged 20-35 yr) and in 30 hospitalized elderly subjects (aged 70-93 yr). In the older subjects the mean 24-hour cAMP excretion was significantly lower; the correlation between c...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jclinpath-2019-206161
更新日期:2020-05-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.2006.044222
更新日期:2007-10-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.47.5.448
更新日期:1994-05-01 00:00:00
abstract::Three cases of islet cell necrosis in neonates are reported. The association of this rare condition with antepartum haemorrhage, anoxia, shock and intravascular coagulation are discussed. The clinical and morphological appearances were compared with previous descriptions of this condition and an association with neona...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.40.10.1206
更新日期:1987-10-01 00:00:00
abstract::Detection of Haemophilus influenzae type b (HIb) antigenuria by latex agglutination has been shown to be sensitive, specific, and rapid. In children, antigenuria persisted for a mean duration of 10 days and a maximum of 18 days. Antigenuria was demonstrated in 25 of 30 patients with HIb infection but not in 62 with ot...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.32.6.538
更新日期:1979-06-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.45.10.934
更新日期:1992-10-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.41.4.381
更新日期:1988-04-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jclinpath-2011-200175
更新日期:2011-11-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.31.8.784
更新日期:1978-08-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章,评审
doi:10.1136/jcp.38.12.1321
更新日期:1985-12-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.15.6.552
更新日期:1962-11-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章,多中心研究
doi:10.1136/jcp.2005.033217
更新日期:2007-06-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.32.3.234
更新日期:1979-03-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.37.4.471
更新日期:1984-04-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.50.11.960
更新日期:1997-11-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.35.3.285
更新日期:1982-03-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jclinpath-2015-203580
更新日期:2016-09-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.38.8.877
更新日期:1985-08-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.16.5.480
更新日期:1963-09-01 00:00:00
abstract::A case of bacterial endocarditis was caused by Cardiobacterium hominis in a 41-year-old man with mitral and aortic incompetence due to a previous episode of rheumatic fever. The main distinguishing characteristics of C. hominis are described, and the incidence of endocarditis is reviewed. After six weeks of treatment ...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.30.11.1033
更新日期:1977-11-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.29.5.380
更新日期:1976-05-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jclinpath-2016-203638
更新日期:2016-04-22 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.52.3.203
更新日期:1999-03-01 00:00:00
abstract::A miniaturised method for the identification of anaerobic bacteria is described which employs microtitre fermentation tests, a spot indole test and a nitrate reduction disc test. The results obtained are directly comparable with those produced by a standard conventional method in use at present. ...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.37.1.70
更新日期:1984-01-01 00:00:00
abstract::Common acute lymphoblastic leukaemia antigen (CALLA) was first characterised in lymphoid leukaemic cells. The antigen is present in different stages of lymphoid cell differentiation as well as in subsets of myeloid cells, and further studies have also shown its presence in non-lymphoid tissues. The recent cloning and ...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.43.8.654
更新日期:1990-08-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.31.6.578
更新日期:1978-06-01 00:00:00
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journal_title:Journal of clinical pathology
pub_type: 杂志文章,多中心研究,随机对照试验
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更新日期:2005-11-01 00:00:00