Genomic organization and partial duplication of the human alpha7 neuronal nicotinic acetylcholine receptor gene (CHRNA7)

The human alpha7 neuronal nicotinic acetylcholine receptor gene (HGMW-approved symbol CHRNA7) has been characterized from genomic clones. The gene is similar in structure to the chick alpha7 gene with 10 exons and conserved splice junction positions. The size of the human gene is estimated to be larger than 75 kb. A putative promoter 5' of the translation start in exon 1 has been cloned and sequenced. The promoter region lacks a TATA box and has a high GC content (77%). Consensus Sp1, AP-2, Egr-1, and CREB transcription factor binding sites appear to be conserved between bovine and human genes. The alpha7 nAChR gene was found to be partially duplicated, with both loci mapping to the chromosome 15q13 region. A yeast artificial chromosome contig was constructed over a genetic distance of 5 cM that includes both alpha7 loci and the region between them. Four novel exons are described, located in genomic clones containing the partially duplicated gene. The duplicated sequences, including the novel exons, are expressed in human brain.

Isolation and characterization of a novel human bladder cancer cell line: BK10

Molecular studies of bladder carcinomas have aided in determining causative genetic events and the prognosis of cancers endowed with certain abnormalities. In vitro bladder cancer characterization of key cytogenetic alterations is useful for study of molecular changes that may promote oncogenic events. In our laboratory, a novel human bladder cancer cell line, BK10, has been established in vitro and passaged for more than 20 mo. This new bladder cancer cell line (BK10) was derived from bladder tissue containing grade III-IV/IV transitional cell carcinoma. Bladder cancer tissue was obtained at the time of radical cystoprostatectomy extirpation. Cell cultures derived from this surgical sample exhibited an epithelial morphology and expressed epithelial cytokeratins. Immunostains of BK10 were negative for prostate specific antigen (PSA), fibronectin, smooth muscle actin alpha, and desmin. Karyotypic analysis revealed an aneuploid chromosomal content <4n> with many numerical and structural abnormalities previously linked to bladder oncogenesis. Translocations occurred in chromosomes 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 14, 15, 16, 17, 19, 20, 21, 22, X and Y. G-banding analysis revealed rearrangements involving chromosomes 9q and 17p, and the location of the ab11 oncogene and the p53 gene, respectively. The availability of this bladder cancer cell line will provide a useful tool for the further study of bladder carcinoma oncogenesis and gene therapy.

A post hoc comparison of paroxetine and nortriptyline for symptoms of traumatic grief

BACKGROUND

This report presents the results of an open-trial pilot study of paroxetine for symptoms of traumatic grief, compared with the effects of nortriptyline in an archival contrast group.

METHOD

Data are presented on 15 subjects (4 men, 11 women), ranging in age from 40 to 79 years (mean age = 57 years), who experienced the loss of a spouse (N = 8), child (N =5), grandchild (N = 1), or parent (N = 1). Subjects were required to have a baseline score on the Inventory of Complicated Grief (ICG) of > or = 20. Treatment with paroxetine began at a median of 17 months (range, 6-139 months) after the loss. Paroxetine-treated subjects received a psychotherapy tailored for traumatic grief. Depressive symptoms were assessed by using the Hamilton Rating Scale for Depression (HAM-D). The ICG and the HAM-D were administered weekly over 4 months of paroxetine treatment (median dose = 30 mg/day). The group receiving paroxetine were then compared with a group (N = 22) participating in a separate trial of nortriptyline (median dose = 77.5 mg/day) for treatment of bereavement-related major depressive episodes.

RESULTS

Level of traumatic grief symptoms (ICG) decreased by 53%, and depression ratings (HAM-D) decreased by 54% in paroxetine-treated subjects. Nortriptyline showed clinical effects comparable to those of paroxetine.

CONCLUSION

Paroxetine may be an effective agent in the treatment of traumatic grief symptoms. A comparison of the paroxetine-treated group with a nortriptyline-treated group suggests that both agents have comparably beneficial effects on the symptoms of traumatic grief (as well as those of depression). However, the higher rate of diagnostic comorbidity in the paroxetine-treated group, together with the greater chronicity of their symptoms and the greater safety of paroxetine in overdose, leads us to favor paroxetine over nortriptyline for traumatic grief symptoms in general psychiatric practice. Further controlled evaluation of paroxetine for traumatic grief is necessary.

The 'Bodywise' initiative

Young people want access to good information in suitable settings so they can discuss sexual matters openly. Services are needed to bridge the gap between paediatric and adult health services. Interprofessional collaboration can provide effective, integrated and supportive services for users and providers. Static and outreach services are essential to facilitate young people's access to the services.

Validation parameters for a novel biosensor assay which simultaneously measures serum concentrations of a humanized monoclonal antibody and detects induced antibodies

This report documents the validation of an assay using BIAcore 2000 that, with a single injection of mouse serum, allows the quantitation of a humanized monoclonal antibody and can also detect the presence of antibodies directed against this humanized antibody. The important components required for the validation of biosensor assays including precision, accuracy, linearity, stability of the immobilized ligand, specificity and sensitivity are addressed. The tandem assay that is used as a model for biosensor validations is accomplished by flowing each sample across the surface of two flowcells in sequence. The first flowcell has the antigen that the humanized mAb was generated against immobilized while the humanized mAb itself is immobilized on the second flowcell. The quantitation component of this assay is precise and accurate with a limit of quantitation of 1 microg/ml in mouse serum samples. Any antibodies directed against the humanized mAb can be detected and also characterized as to isotype. This unique assay can be performed with as little as 10 microl of serum which is then diluted ten-fold prior to analysis. The small sample requirement allows analysis of individual mouse serum samples rather than requiring the use of pooled samples from multiple mice. A further advantage of this assay is the automation capability which allows unattended operation.

Adrenal function predicts demoralization after losses

Stressful experiences can cause disturbances in the hypothalamic-pituitary-adrenocortical axis and the sympathetic-adrenomedullary system. The authors hypothesized that assessments of adrenal function made in the circumstances of stressful losses would predict outcome 1 or 2 years later. The authors collected 24-hour urinary free cortisol, serum cortisol, and 24-hour urinary catecholamines 2 months after intake and used these measures as predictors of depression, anxiety, hopelessness/helplessness, unresolved grief, self-rated health, and help-seeking behavior on follow-up at 13 and 25 months. Adrenal function in the circumstances of a loss predicted only demoralization scores (hopelessness/helplessness) on follow-up.

Comparison of open and laparoscopic live donor nephrectomy

OBJECTIVE

This study compares an initial group of patients undergoing laparoscopic live donor nephrectomy to a group of patients undergoing open donor nephrectomy to assess the efficacy, morbidity, and patient recovery after the laparoscopic technique.

SUMMARY BACKGROUND DATA

Recent data have shown the technical feasibility of harvesting live renal allografts using a laparoscopic approach. However, comparison of donor recovery, morbidity, and short-term graft function to open donor nephrectomy has not been performed previously.

METHODS

An initial series of patients undergoing laparoscopic live donor nephrectomy were compared to historic control subjects undergoing open donor nephrectomy. The groups were matched for age, gender, race, and comorbidity. Graft function, intraoperative variables, and clinical outcome of the two groups were compared.

RESULTS

Laparoscopic donor nephrectomy was attempted in 70 patients and completed successfully in 94% of cases. Graft survival was 97% versus 98% (p = 0.6191), and immediate graft function occurred in 97% versus 100% in the laparoscopic and open groups, respectively (p = 0.4961). Blood loss, length of stay, parenteral narcotic requirements, resumption of diet, and return to normal activity were significantly less in the laparoscopic group. Mean warm ischemia time was 3 minutes after laparoscopic harvest. Morbidity was 14% in the laparoscopic group and 35% in the open group. There was no mortality in either group.

CONCLUSIONS

Laparoscopic live donor nephrectomy can be performed with morbidity and mortality comparable to open donor nephrectomy, with substantial improvements in patient recovery after the laparoscopic approach. Initial graft survival and function rates are equal to those of open donor nephrectomy, but longer follow-up is necessary to confirm these observations.

Traumatic grief as a risk factor for mental and physical morbidity

OBJECTIVE

The aim of this study was to confirm and extend the authors' previous work indicating that symptoms of traumatic grief are predictors of future physical and mental health outcomes.

METHOD

The study group consisted of 150 future widows and widowers interviewed at the time of their spouse's hospital admission and at 6-week and 6-, 13-, and 25- month follow-ups. Traumatic grief was measured with a modified version of the Grief Measurement Scale. Mental and physical health outcomes were assessed by self-report and interviewer evaluation. Survival analysis and linear and logistic regressions were used to determine the risk for adverse mental and physical health outcomes posed by traumatic grief.

RESULTS

Survival and regression analyses indicated that the presence of traumatic grief symptoms approximately 6 months after the death of the spouse predicted such negative health outcomes as cancer, heart trouble, high blood pressure, suicidal ideation, and changes in eating habits at 13- or 25-month follow-up.

CONCLUSIONS

The results suggest that it may not be the stress of bereavement, per se, that puts individuals at risk for long-term mental and physical health impairments and adverse health behaviors. Rather, it appears that psychiatric sequelae such as traumatic grief are of critical importance in determining which bereaved individuals will be at risk for long-term dysfunction.

Using research for successful Medicare and Medicaid risk marketing

Medicare/Medicaid risk marketing is a vital business challenge, one that countless managed care organizations are facing right now. Early entry into new markets and aggressive participation in existing markets are essential to meet competitive pressures. Health plans intent on success in government risk programs should conduct research to learn the medical needs, wants, and desires of older persons in the geographic area they serve. Original, market-specific research yields critical marketing and clinical data that can be used to improve care and member satisfaction along with customer loyalty and retention.

Assessment of the agreement between cardiac output measured by bolus thermodilution and continuous methods, with particular reference to the effect of heart rhythm

Cardiac output (CO) is a fundamentally important haemodynamic parameter and its continuous measurement has the potential to enable early recognition of haemodynamic trends and earlier therapeutic response. A method of continuous cardiac output (CCO) monitoring is now available for clinical use. The accuracy and reliability of this method has been confirmed in clinical trials but not, to our knowledge, in the presence of abnormal heart rhythms. A comparison was made between CCO and bolus thermodilution methods, to determine if there is a greater difference between their respective determinations of CO when heart rhythm is abnormal. A convenience sample of 38 intensive care patients was used to obtain 410 comparisons of CCO and bolus CO determinations. Heart rhythm associated with each comparison was determined. The comparison produced a measurement bias of -0.07 l/min and limits of agreement of -1.77 to 1.63 l/min. The bias of the two measurements was -0.35 l/min for sinus rhythm, -0.19 l/min for sinus tachycardia and -0.12 l/min for atrial flutter/fibrillation. Increased temperature and heart rate did not affect measurement agreement. In conclusion, the agreement between the bolus and continuous methods is clinically acceptable and is unaffected by the heart rhythms of sinus rhythm, sinus tachycardia and atrial flutter/fibrillation.

Complicated grief as a disorder distinct from bereavement-related depression and anxiety: a replication study

OBJECTIVE

This study sought to confirm in an independent, nonclinical study group previous work which demonstrated that the symptoms of complicated grief were distinct from the symptoms of bereavement related depression and anxiety.

METHOD

Data used in the analyses were derived from a group of 150 widowed individuals who were interviewed 6 months after their deceased spouses' hospital admission (study entry). Complicated grief was measured with a modified version of the Grief Measurement Scale. Principal axis factoring was used to determine the distinctiveness of complicated grief, depression, and anxiety.

RESULTS

The principal axis factoring showed that the symptoms of complicated grief loaded quite highly on the first (complicated grief) factor and loaded very poorly on the anxiety and depression factors.

CONCLUSIONS

The results confirmed the authors' previous findings demonstrating the distinction between symptoms of complicated grief and symptoms of bereavement-related depression and anxiety.

Cerebral SPECT imaging: effect on clinical management

This study, performed in 94 consecutive patients referred for evaluation, demonstrates the clinical utility of cerebral SPECT imaging. In a significant percentage of patients (47%), the additional information provided by SPECT resulted in an alteration in clinical management. Long-term follow-up will be necessary to determine the effect of these management decisions on patient outcome.

Pseudomonas aeruginosa outbreak associated with a contaminated blood-gas analyser in a neonatal intensive care unit

Over a 10 month period in a neonatal intensive care unit there was an outbreak of infection caused by Pseudomonas aeruginosa (resistant to ticarcillin, timentin) which involved 24 newborns. There was extensive morbidity and mortality (38%) associated with the infections, which presented as septicaemia (N = 6) (five succumbed and four had coexisting pneumonia), pneumonia (N = 6), meningitis (one, died), conjunctivitis (N = 1), otitis externa (N = 1), conjunctivitis plus otitis externa (N = 1). In addition there were two pseudosepticaemias and six colonized infants, three of whom were treated for the presence of P. aeruginosa in endotracheal aspirates. There was always at least one baby colonized or infected with P. aeruginosa during the outbreak. Environmental surveillance and genomic DNA fingerprinting of isolates identified the blood gas analyzer port as the likely reservoir for the outbreak. Further spread of the organism did not occur after commencement of staff education on vigilant and careful handwashing, especially after use of the blood-gas analyser.