The salivary microbiota as a diagnostic indicator of oral cancer: A descriptive,non-randomized study of cancer-free and oral squamous cell carcinoma subjects

Background  

The purpose of the present investigation was to determine if the salivary counts of 40 common oral bacteria in subjects with an oral squamous cell carcinoma (OSCC) lesion would differ from those found in cancer-free (OSCC-free) controls.     

Screening for Depression in the Medically Ill: a comparison of self-report measures, clinician judgment, and DSM-IV diagnoses

The performance of the self-report 10-item Depression in the Medically Ill scale was observed in 210 patients as part of clinical assessment by consultation-liaison psychiatry clinicians. Both the Depression in the Medically Ill scale and the Beck Depression Inventory for Primary Care were completed by the patient, and the clinicians made their judgment of the presence and severity of "clinical depression" and DSM-IV affective disorder diagnoses. Both the Depression in the Medically Ill scale and the Beck Depression Inventory for Primary Care detected 85% of patients with DSM-IV major depressive episode. The Depression in the Medically Ill scale was slightly superior to the Beck Depression Inventory for Primary Care in its relationship to clinicians' judgments of clinical depression caseness.     

Biliary glycoprotein (BGPa, CD66a, CEACAM1) mediates inhibitory signals

Biliary glycoprotein (BGP, CD66a, CEACAM1) is a member of the carcinoembryonic antigen family (CEA, CD66), a group of transmembrane proteins belonging to the immunoglobulin superfamily. The structural features surrounding the tyrosine residues in the cytoplasmic domain of BGP share similarity with the consensus sequence of the immunoreceptor tyrosine-based inhibition motif (ITIM), the docking site for SHIP, SHP-1, and SHP-2 molecules. Using the well-characterized inhibitory receptor, FcgammaRIIB, we constructed a FcgammaRIIB-BGPa chimeric molecule that contained the extracellular and transmembrane domain of FcgammaRIIB and the cytoplasmic tail of BGPa and expressed it in DT40 B cells. Our results showed that FcgammaRIIB-BGPa, just like the unmodified FcgammaRIIB molecule, inhibited calcium influx in activated DT40 B cells. Substitution of tyrosine with phenylalanine (Y459F) in FcgammaRIIB-BGPa completely abrogated its ability to inhibit calcium influx, indicating that the motif surrounding Y459 is ITIM. The presence of ITIM was also supported by showing that the FcgammaRIIB-BGPa-mediated inhibitory effect was reduced in SHP-1and SHP-2 mutant DT40 B cells and further diminished in a SHP-1/-2 double-deficient mutant line. The results suggest that SHP-1 and SHP-2 are required for the FcgammaRIIB-BGPa-mediated inhibitory signals.     

A simple and practical technic for detecting cancer cells in urine and urinary bladder washings by flow cytometry

DNA measurement by flow cytometry has been demonstrated to be a potentially useful technic in the diagnosis of bladder cancer by detecting neoplastic cells in bladder washings and urine specimens. The authors' goal was to develop a simple and practical method utilizing the new generation of cytofluorographs designed for use in the clinical laboratory. This method combined direct fixation with cell lysis yielding fixed intact nuclei. Following RNase and pepsin digestion, the nuclei were separated from debris and aggregates on a sucrose barrier, stained with ethidium bromide, and analyzed with an argon laser analytic cytofluorograph. Urines and bladder washings from 14 patients with positive urinary cytology and histologically diagnosed bladder cancers were compared with specimens from patients without urothelial malignancies. DNA histograms clearly delineated aneuploid from diploid populations and often identified S, G2M, and G1 phase nuclei. Aneuploid populations have been detected in all tumor specimens with positive cytologies studied to date.     

H-2 restriction and serotype crossreactivity of anti-reovirus cytotoxic T lymphocytes (CTL)

Murine anti-reovirus cytotoxic T lymphocytes (CTLs) were analyzed for H-2 restricted recognition of virus infected target cells and for potential cross-reactivity with cells infected by reovirus serotype 1 (T1; Lang strain) or by serotype 3 (T3; Dearing strain). Anti-reovirus CTL specifically lysed virus infected cells and lysis was shown to be H-2 restricted by the H-2Dd, H-2Ld, H-2Kd, H-2Kb, and H-2Kk antigens. No H-2 antigens were identified which failed to restrict virus recognition by anti-reovirus CTL. Anti-T1 and anti-T3 CTLs were also shown to crossreact completely with cells infected with the opposite virus serotype. Thus, anti-reovirus CTLs are restricted by a broad spectrum of H-2 antigens and they detect common rather than unique structural components of these two viral serotypes.