Abstract:
AIMS:The generation and characterisation of a monoclonal antibody that specifically recognises the mdr-1 encoded protein, P-glycoprotein (P-170), on routinely processed formalin fixed, paraffin wax embedded tissue sections. METHODS:The monoclonal antibody, designated 6/1C, was produced following a combination of in vivo and in vitro immunisation regimens in Balb/c mice with a synthetic 12 amino acid peptide that corresponds to amino acids 21-32 (believed to be intracellularly located) of P-170 and has insignificant homology with the mdr-3 encoded P-170. Antibody 6/1C was characterised by western blotting and immunocytochemistry on cytospins of paired multidrug resistant or sensitive cell lines, including mdr-1 and mdr-3 transfected cells, and by immunohistochemistry on normal and malignant formalin fixed paraffin wax embedded tissue sections. RESULTS:Antibody 6/1C showed a single band at 170 kDa on western blots of multidrug resistant cell lysates and mdr-1 transfected cell lysates that was absent on similar preparations of drug sensitive cells and mdr-3 transfected cells. Immunocytochemical studies on cytospins of multidrug resistant cells and mdr-1 transfected cells revealed strong inner plasma membrane/cytoplasmic staining. Staining was negligible on drug sensitive cells and cells transfected with the mdr-3 gene. Immunohistochemical studies on formalin fixed, paraffin wax embedded normal adult kidney, liver, and breast tissue and a range of fetal tissues exhibited staining patterns of a variety of secretory surfaces consistent with documented mdr-1 specific staining. Specific staining of malignant cells in similarly treated sections of breast tumours was seen also with antibody 6/1C. Staining on paraffin wax embedded tissue with this antibody did not require any pretreatment of tissue sections. CONCLUSIONS:This new monoclonal antibody, chosen for its specificity with the mdr-1 encoded P-170 and its reactivity on routinely fixed paraffin wax embedded tissue samples without pretreatment, appears to be useful for the investigation of P-170 in archival material. It is especially useful for retrospective studies on pretreatment and post-treatment tissue sections, and could help establish when and how rapidly mdr-1 associated drug resistance develops during chemotherapeutic regimens. Immunohistochemical assessment of P-170 expression in many cancers has potential for diagnostic purposes and may influence the choice of chemotherapeutic drugs used in the treatment of refractory tumours.
journal_name
J Clin Patholjournal_title
Journal of clinical pathologyauthors
Moran E,Larkin A,Doherty G,Kelehan P,Kennedy S,Clynes Mdoi
10.1136/jcp.50.6.465subject
Has Abstractpub_date
1997-06-01 00:00:00pages
465-71issue
6eissn
0021-9746issn
1472-4146journal_volume
50pub_type
杂志文章abstract:AIMS:To study the localisation of the endothelial nitric oxide synthase (eNOS) in the normal placenta, with special emphasis on the implantation site in the first trimester of pregnancy, and in the different subtypes of trophoblastic cells in gestational trophoblastic disease. METHODS:The immunoperoxidase technique wi...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.51.6.427
更新日期:1998-06-01 00:00:00
abstract::TLE 1 is the human homologue belonging to a family of four genes and is located on chromosome 9q21. It consists of 19 exons. Although it does not bind directly to DNA, it acts as a repressor of several signalling pathways via transcription factors. TLE1 protein has several physiological roles in embryogenesis, haemato...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jclinpath-2020-207174
更新日期:2021-01-13 00:00:00
abstract:AIMS:The aims of this study were (1) to determine the measurement accuracy of a widely used guaiac faecal occult blood test (gFOBT) compared with an immunochemical faecal occult blood test (iFOBT) during in vitro studies, including their analytical stability over time at ambient temperature and at 4°C; and (2) to compa...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.2010.085399
更新日期:2011-06-01 00:00:00
abstract::A slight modification in tissue processing and staining technique enables a previously described method for staining aluminium to be used to demonstrate aluminium in osteomalacia associated with haemodialysis. The stain appears to be accurate in diagnosing this condition and may assist in establishing the diagnosis be...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.34.12.1352
更新日期:1981-12-01 00:00:00
abstract::A histochemical method is described of differentiating between normal and neoplastic cells in plasma using the activity of various enzymes characteristic of plasma cells. It was found that in both types of cell increased or diminished activity of cytoenzymes is a useful means of distinguishing between normal and abnor...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.18.3.345
更新日期:1965-05-01 00:00:00
abstract::Eosinophil polymorphonuclear leucocytes (polymorphs) were counted in 45 specimens from patients with Hodgkin's disease and five specimens from patients with reactive follicular hyperplasia. The use of chlorazol fast pink BK, a little known stain for eosinophil polymorphs, combined with image analysis facilitated rapid...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.37.3.267
更新日期:1984-03-01 00:00:00
abstract::In studies using indirect immunofluorescence IgG antibodies to Clostridium perfringens were found in sera from healthy adults. Sera from 236 healthy children were examined. The normally occurring IgG antibodies to C perfringens were found to have an age related variation. Preliminary data suggest that they are not cor...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.40.3.282
更新日期:1987-03-01 00:00:00
abstract::Sink drains in a medical-surgical intensive care unit (ICU) were cultured during six consecutive weeks as part of a seven month prospective study of acquisition of Pseudomonas aeruginosa by ICU patients. Isolates were typed serologically and by aminoglycoside and chlorhexidine susceptibility patterns. All 11 sinks con...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.37.4.424
更新日期:1984-04-01 00:00:00
abstract::In colonic biopsies of 33 patients with acute colitis caused by campylobacter, salmonella, or shigella immunoglobulin containing cells were determined quantitatively using an indirect immunoperoxidase technique and morphometry with a graphic tablet. The findings were compared with those of 10 patients without histolog...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.38.7.774
更新日期:1985-07-01 00:00:00
abstract::The principles which should govern the planning of benching and services for new laboratories are enumerated. These include the necessity for long-term planning, flexibility, and economy. The ;Cardiff benching system' where the benches are composed of units that consist of an independent movable table base, a removabl...
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::The Scottish Meningococcus and Pneumococcus Reference Laboratory provides a national service for the laboratory confirmation of meningococcal and pneumococcal disease in Scotland. The main tests used for the laboratory confirmation of meningococcal disease are culture, the polymerase chain reaction (PCR), antibody tes...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.54.7.556
更新日期:2001-07-01 00:00:00
abstract:AIM:To investigate the association between the quantity of gastric chemokine mRNA expression, severity of gastritis, and cagA positivity in Helicobacter pylori associated gastritis. METHODS:In 83 dyspeptic patients, antral and corpus biopsies were taken for semiquantitative reverse transcription polymerase chain react...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.51.10.765
更新日期:1998-10-01 00:00:00
abstract:BACKGROUND:Epstein's syndrome is defined as a subtype of Alport's syndrome, and is distinguished from the other subtypes by accompanying macrothrombocytopenia. Mutations in collagen IV genes are known to be involved in the pathogenesis of typical Alport's syndrome. However, the presence of an underlying genetic defect ...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.50.11.919
更新日期:1997-11-01 00:00:00
abstract::A "Centrifichem" centrifugal analyser was found using a double fluorescence/bacterial tracer method to be a source of airborne and surface contamination in the laboratory. The airborne contamination was controlled by a modification incorporating a filter. Ubiquitous surface contamination generally accompanied the proc...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.41.11.1229
更新日期:1988-11-01 00:00:00
abstract::DNA typing was requested to investigate a presumptive cancer diagnosis error by confirming whether benign and cancerous prostatic tissue in the same presurgical haematoxylin and eosin stained slide belonged to the same person. After independent histological re-examination of the slide by a pathologist, manual slide di...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.2004.017673
更新日期:2005-01-01 00:00:00
abstract::Phyllodes tumours (PTs) of the breast are true biphasic neoplasms within which interactions between the epithelium and stroma are critical for tumour development and progression. Despite numerous studies reporting the results of ancillary marker investigations in PTs, the current histological grading systems remain un...
journal_title:Journal of clinical pathology
pub_type: 杂志文章,评审
doi:10.1136/jclinpath-2012-201082
更新日期:2013-06-01 00:00:00
abstract::Tumour associated antigens recognised by cellular or humoral effectors of the immune system are potential targets for antigen specific cancer immunotherapy. Different categories of cancer antigens have been identified that induce cytotoxic T lymphocyte (CTL) responses in vitro and in vivo, namely: (1) "cancer testis" ...
journal_title:Journal of clinical pathology
pub_type: 杂志文章,评审
doi:10.1136/jcp.54.9.669
更新日期:2001-09-01 00:00:00
abstract::A case of IgD myeloma accompanied by diffuse osteosclerosis is reported. A trephine biopsy specimen showed only reticulin fibrosis, but histomorphometric analysis of a full thickness transiliac bone biopsy specimen showed increased trabecular bone mass, with no local deposit of tumour. An excess of bone surfaces were ...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.41.5.486
更新日期:1988-05-01 00:00:00
abstract:AIMS:To investigate staining patterns for mannan binding protein (MBP) by immunocytochemistry in liver biopsy specimens from patients with various hepatic disorders; to measure the serum MBP concentration in the patients at the time of biopsy; and to compare these to define further the role of MBP in disease. METHODS:...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.46.3.259
更新日期:1993-03-01 00:00:00
abstract::Severe osteomalacia (confirmed by the examination of thin undecalcified bone biopsy sections) associated with hypophosphataemia developed in a 60 year old woman. A skeletal x-ray survey showed a lytic lesion in the right proximal femur, and this was curetted, showing a vascular tumour. The patient's symptoms improved ...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.40.4.446
更新日期:1987-04-01 00:00:00
abstract:AIMS:Immunohistochemical stains have greatly improved the diagnostic accuracy of renal cell carcinoma (RCC) for primary and distant tumours. We evaluate a marker that has recently been incorporated in clinical practice, PAX-8, in primary and metastatic RCCs. METHODS:Two distinct tissue microarrays were used, one consi...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jclinpath-2014-202259
更新日期:2015-01-01 00:00:00
abstract::Two hundred and forty-seven strains of micro-organisms were isolated from the urinary tract of 121 patients with neurological complaints leading to paraplegia. The commonest infecting organism was E. coli and the commonest type of Proteus was P. mirabilis. Infections with more than one type of organism were present in...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.13.1.54
更新日期:1960-01-01 00:00:00
abstract::Laboratory studies on clotrimazole showed that it had marked activity in vitro against all the Candida spp. and Cryptococcus spp. tested, against almost all strains of dermatophytes, and against Aspergillus spp and other fungal genera responsible for systemic mycoses; it had limited activity towards Gram-positive bact...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.25.12.1089
更新日期:1972-12-01 00:00:00
abstract::The occurrence of unexplained, rapidly recurring occlusions of arteries and veins in a previously healthy young woman is described. Post mortem examination showed no macroscopic abnormalities but revealed microscopic metastatic adenocarcinoma with remarkable intravascular localisation of the malignant cells. Whereas h...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.47.9.858
更新日期:1994-09-01 00:00:00
abstract:AIMS:To clarify a clinical entity of juvenile polyposis of the stomach compared with generalised juvenile gastrointestinal polyposis. METHODS:The clinicopathological features of juvenile polyposis dominantly involving the stomach at initial presentation were reviewed in 12 patients (three new patients and nine from th...
journal_title:Journal of clinical pathology
pub_type: 杂志文章,评审
doi:10.1136/jcp.50.9.771
更新日期:1997-09-01 00:00:00
abstract:AIMS:Although the autopsy is still the gold standard for quality assessment of clinical diagnoses, autopsy rates have been declining over the last decades to <10%. The aim of this study was to investigate the value of autopsies in the high-tech medicine era by determining the frequency of discrepancies between clinical...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jclinpath-2013-202122
更新日期:2014-06-01 00:00:00
abstract:AIMS:To determine the potential efficiency of molecular markers specific for neoplastic change--mutations of the K-ras oncogene and the p53 tumour suppressor gene--in diagnosing pancreatic carcinoma. METHODS:Archival cytology samples obtained from 17 patients with established pancreatic carcinoma were assayed for alte...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jcp.48.3.218
更新日期:1995-03-01 00:00:00
abstract:AIMS:Accurate assessment of HER2 status is essential for selection of patients for HER2-targeted treatment such as trastuzumab. This study investigated the hypothesis that delayed fixation impairs HER2 assessment. METHODS:9 carcinomas were received fresh, and samples were fixed immediately or put in fixative at time i...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jclinpath-2013-201978
更新日期:2014-07-01 00:00:00
abstract:AIMS:Multiple myeloma (MM) is a heterogeneous disease characterised by genetically complex abnormalities. The classical mutational spectrum includes recurrent chromosomal aberrations and gene-level mutations. Recurrent translocations involving the IGH gene such as t(11;14), t(4;14) and t(14;16) are well known. However,...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jclinpath-2017-204961
更新日期:2018-08-01 00:00:00
abstract:AIMS:Venous invasion (VI) is a known independent prognostic indicator of recurrence and survival in colorectal cancer. The guidelines of the Royal College of Pathologists (RCPath) state that, in a series of resections, extramural VI should be detected in at least 25% of specimens. However, there is widespread variabili...
journal_title:Journal of clinical pathology
pub_type: 杂志文章
doi:10.1136/jclinpath-2011-200156
更新日期:2011-11-01 00:00:00