Abstract:
:The CK-BB isoenzyme is ubiquitous in neoplastic tissue, but with low activity. Accordingly, it might be a nonspecific and insensitive tumor marker. Evaluation of BB isoenzyme in serum might indicate the extent of diseases or the response to therapy. The presence of CK-MB in patients with cancers may cause confusion with AMI. Serial determinations of both CK and lactate dehydrogenase isoenzymes are of great help in differential diagnosis. The presence of mit-CK is a poor prognostic sign in patients with malignancy. The greatest clinical significance of CK-BB and macro-CK isoenzyme lies in their effect on various assays for CK-MB. Macro-CK types 1 and 2 are much more heat stable than are CK-MB and CK-BB, and so by heating samples for 20 min at 45 degrees C the presence of thermostable macro types can be demonstrated. Macro-CK type 2 has a much higher activation energy than macro-CK type 1. If macro-CK is present, determination of the activation energy easily differentiates between types 1 and 2. CK-Bi seems to be glycosylated protein, and it is thought that glycosylation may be a general way of enzyme inactivation. If inactivation inside the cell is postulated, it has to be shown that enzymes indeed pass into the cell compartments where glycosylating enzymes are located. Another possible mechanism is within the circulation. Whether malignant cells themselves produce Ck-Bi or if inactivation occurs in the blood is still unknown. In this connection, one finding is that in plasma of cancer patients, CK-Bi can be reactivated to CK-BB by mercaptoethanol to 95%, whereas in plasma of normal persons there is no reactivation of the much lower CK-Bi concentrations.
journal_name
Crit Rev Clin Lab Scijournal_title
Critical reviews in clinical laboratory sciencesauthors
Tsung JSdoi
10.3109/10408368609165795subject
Has Abstractpub_date
1986-01-01 00:00:00pages
65-75issue
1eissn
1040-8363issn
1549-781Xjournal_volume
23pub_type
杂志文章,评审abstract::There have been numerous reports of spectrophotometric and volume problems caused by elevated levels of lipids in blood. The offending lipids, primarily triglycerides, not only cause turbidity leading to optical aberrations when added to analytical reagents, but also result in short-sampling errors leading to the meas...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408368709105876
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journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408368609111596
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journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
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journal_title:Critical reviews in clinical laboratory sciences
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journal_title:Critical reviews in clinical laboratory sciences
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abstract::Infection with hepatitis delta virus (HDV), a satellite virus of hepatitis B virus (HBV), is associated with severe and sometimes fulminant hepatitis. The traditional methods for the diagnosis of HDV infection, such as detection of serum anti-HD antibodies, are sufficient for the clinical diagnosis of delta infection....
journal_title:Critical reviews in clinical laboratory sciences
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journal_title:Critical reviews in clinical laboratory sciences
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journal_title:Critical reviews in clinical laboratory sciences
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journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
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更新日期:1996-01-01 00:00:00
abstract::Programmed death receptor-1 (PD-1) and its ligand, PD-L1, as negative co-stimulatory molecules, are indispensable for regulating both physiological and pathological immune responses. The PD-1/PD-L1-mediated signaling pathway has been studied extensively in cancer research and has become a hotspot for biopharmaceutical...
journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
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journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
doi:10.3109/10408363.2012.738808
更新日期:2012-09-01 00:00:00
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journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
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更新日期:1981-01-01 00:00:00
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journal_title:Critical reviews in clinical laboratory sciences
pub_type: 杂志文章,评审
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journal_title:Critical reviews in clinical laboratory sciences
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更新日期:2014-06-01 00:00:00
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journal_title:Critical reviews in clinical laboratory sciences
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更新日期:2001-08-01 00:00:00
abstract::Prostate cancer (PCa) is one of the most common age-related cancers among men. Various environmental and genetic factors are involved in the development and progression of PCa. In most cases, the primary symptoms of disease are not severe. Therefore, it is common for patients to be referred with severe clinical manife...
journal_title:Critical reviews in clinical laboratory sciences
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更新日期:2020-01-01 00:00:00
abstract::This review provides specific information concerning the interpretation and usefulness of antidepressant drug monitoring. Fifteen antidepressants (ADs) were selected based on their importance in the 7 major markets (Japan, USA, France, United Kingdom, Italy, Spain, Germany) according to the Cognos Plus Study #11. Lite...
journal_title:Critical reviews in clinical laboratory sciences
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abstract::Low molecular-mass plasma proteins play a key role in health and disease. Cystatin C is an endogenous cysteine proteinase inhibitor belonging to the type 2 cystatin superfamily. The mature, active form of human cystatin C is a single non-glycosylated polypeptide chain consisting of 120 amino acid residues, with a mole...
journal_title:Critical reviews in clinical laboratory sciences
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journal_title:Critical reviews in clinical laboratory sciences
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journal_title:Critical reviews in clinical laboratory sciences
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journal_title:Critical reviews in clinical laboratory sciences
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abstract::The kallikrein-related peptidases (KLKs) represent the largest family of serine proteases within the human genome and are expressed in various tissues. Although they regulate several important physiological functions, KLKs have also been implicated in numerous pathophysiological processes, including cancer. Growing ev...
journal_title:Critical reviews in clinical laboratory sciences
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doi:10.3109/10408363.2016.1154643
更新日期:2016-08-01 00:00:00
abstract::Urine drug testing is one of the objective tools available to assess adherence. To monitor adherence, quantitative urinary results can assist in differentiating "new" drug use from "previous" (historical) drug use. "Spikes" in urinary concentration can assist in identifying patterns of drug use. Coupled chromatographi...
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abstract::Resveratrol and its naturally dimethylated analog, pterostilbene, show similar biological activities. However, the higher in vivo bioavailability of pterostilbene represents a fundamental advantage. The main focus of this review is on biomedical applications of pterostilbene. The metabolism and pharmacokinetics of thi...
journal_title:Critical reviews in clinical laboratory sciences
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更新日期:2013-05-01 00:00:00
abstract::The deoxyuridine suppression (dU) test, first described in 1964, has gained an important place both in the diagnosis of megaloblastic anemias and in the study of vitamin B12 folate interrelationships in the pathogenesis of megaloblastic anemia. The test measures the integrity of the de novo synthetic pathway of DNA sy...
journal_title:Critical reviews in clinical laboratory sciences
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更新日期:1984-01-01 00:00:00
abstract::Cardiac diseases have been extensively studied following diabetes and altered metabolism has been implicated in its initiation. In this context, there is a shift from glucose utilization to predominantly fatty acid metabolism. We have focused on the micro- and macro-environments that the heart uses to provide fatty ac...
journal_title:Critical reviews in clinical laboratory sciences
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abstract::Antiphospholipid antibodies (aPL) constitute a heterogeneous group of autoantibodies that share the ability to bind phospholipids (PL) alone, protein-PL complexes, or PL-binding proteins. They have been detected in isolation, in association with autoimmune diseases such as systemic lupus erythematosus (SLE), and durin...
journal_title:Critical reviews in clinical laboratory sciences
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更新日期:2007-01-01 00:00:00
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journal_title:Critical reviews in clinical laboratory sciences
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更新日期:2013-01-01 00:00:00
abstract::The discovery of a G protein-coupled, calcium-sensing receptor (CaR) a decade ago and of diseases caused by CaR mutations provided unquestionable evidence of the CaR's critical role in the maintenance of systemic calcium homeostasis. On the cell membrane of the chief cells of the parathyroid glands, the CaR "senses" t...
journal_title:Critical reviews in clinical laboratory sciences
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更新日期:2005-01-01 00:00:00