Induction of 5alpha-reductase type II mRNA transcription in primary cultured prostate epithelial cells by a soluble factor produced by primary cultured prostate fibroblast cells

The role of DHT in the development of BPH has resulted in the formulation of several drugs, which have been designed to inhibit the formation of DHT by the 5alpha-reductase enzymes (5alpha-reductase type I (5alpha-RI) & 5alpha-reductase type II (5alpha-RII)). Although the function of these enzymes is well understood, the biochemical stimulus for initiation of 5alpha-RI and II gene expression has not been described. Study of a co-culture model indicated the presence of a diffusible factor secreted by prostatic fibroblast cells, which is responsible for the transcription of 5alpha-II mRNA in primary prostatic epithelial cells. In this study, we describe the partial characterisation of a fibroblast-secreted, soluble factor which we believe induces the transcription of 5alpha-RII mRNA in long-term primary cultures of prostate epithelial cells which can no longer transcribe 5alpha-RII mRNA.

A phase I trial of immunotherapy with intratumoral adenovirus-interferon-gamma (TG1041) in patients with malignant melanoma

AIMS

Interferon-gamma (IFN-gamma) has been shown to upregulate MHC class I and II expression, and to promote generation of specific antitumor immune responses. We hypothesized that intratumoral administration of an IFN-gamma gene transfer vector facilitates its enhanced local production and may activate effector cells locally. We conducted a phase I dose-escalation study of a replication-deficient adenovirus-interferon-gamma construct (TG1041) to determine safety and tolerability of intratumoral administration, in advanced or locally recurrent melanoma.

METHODS

Patients were enrolled at four successive dose levels: 10(7) infectious units (iu) (n=3), 10(8) iu (n=3), 10(9) iu (n=3), and 10(10) iu (n=2) per injection per week for 3 weeks. TG1041 was injected in the same tumor nodule weekly in each patient. Safety, toxicity, local and distant tumor responses and biologic correlates were evaluated.

RESULTS

A total of 11 patients were enrolled and received the planned three injections per cycle. One patient with stable disease received a second cycle of treatment. A maximum tolerated dose was not reached in this study. No grade 4 toxicities were observed. Two grade 3 toxicities, fever and deep venous thrombosis were observed in one patient. The most frequently reported toxicities were grade 1 pain and redness at the injected site (n=8), and grade 1 fatigue (n=5) patients. Clinical changes observed at the local injected tumor site included erythema (n=5), a minor decrease in size of the injected lesion (n=5) and significant central necrosis by histopathology (n=1). Systemic effects included stable disease in one patient. Correlative studies did not reveal evidence of immunologic activity.

CONCLUSION

Weekly intratumoral administration of TG1041 appears to be safe and well tolerated in patients with advanced melanoma.

MUC1 expression, splice variant and short form transcription (MUC1/Z, MUC1/Y) in prostate cell lines and tissue

OBJECTIVE

To detect the expression and transcription pattern of MUC1 in benign and malignant disease, and in two widely studied cell lines, and to investigate the glycosylation of MUC-1 in bone metastasis of prostate cancer, as mucins have been implicated in the progression and behaviour of several cancers.

MATERIALS AND METHODS

RNA extracted from cell lines (DU145 and PC3), five samples of BPH and five samples of prostate cancer was reverse transcribed before amplification of MUC1-specific sequences by polymerase chain reaction. Paraffin-embedded sections were stained for glycosylated MUC1 and MUC1 core epitopes by HMFG1 and B27.29 antibodies, respectively. Steroid-treated cell lines were analysed by fluorescence-activated cell sorting, using the same antibodies.

RESULTS

MUC1, in an under-glycosylated form, was widely expressed in the prostate and in metastatic lesions. MUC1/Z and MUC1/Y RNA were differentially expressed in BPH and prostate cancer, with no detectable expression of splice variant mRNA. This is in contrast to prostate cancer cell line cells (PC3 and DU145), which express splice variant mRNA.

CONCLUSIONS

BPH, prostate cancer and metastatic prostate cancer all express high levels of under-glycosylated MUC1. This may explain the inability of previous studies to detect MUC1 in prostate tissue, as the antibody used was specific for a carbohydrate epitope which is not expressed on the under-glycosylated MUC1.

Extremely low vertical-emittance beam in the accelerator test facility at KEK

Electron beams with the lowest, normalized transverse emittance recorded so far were produced and confirmed in single-bunch-mode operation of the Accelerator Test Facility at KEK. We established a tuning method of the damping ring which achieves a small vertical dispersion and small x-y orbit coupling. The vertical emittance was less than 1% of the horizontal emittance. At the zero-intensity limit, the vertical normalized emittance was less than 2.8 x 10(-8) rad m at beam energy 1.3 GeV. At high intensity, strong effects of intrabeam scattering were observed, which had been expected in view of the extremely high particle density due to the small transverse emittance.

Acceptance of syphilis screening among residents of high-STD-risk Houston communities

The purpose of this study was to assess the rate of acceptance of street-intercept syphilis screening and to identify barriers to screening among residents of 2 Houston communities with high rates of syphilis. Each of 691 people who participated in a street-intercept survey about syphilis was offered a free syphilis test immediately after completion of the survey. Acceptors of screening had blood drawn at the site of the interview, and blood samples were tested by rapid plasma reagin (RPR) and a confirmatory microhaemagglutination-Treponema pallidum (MHA-TP) for those with a positive antibody reaction on the RPR. On-street syphilis screening was accepted by 26% of the sample. The most common reason for refusal was not wanting to have blood drawn (19.5%). Among those screened for syphilis (n=148), seroprevalence was 19%, with 33% of women testing positive and 10% of men. The results of this study point to a need for increased case-finding, standard screening recommendations, and interventions targeting specific barriers to syphilis screening.

Vulvar melanoma at the M. D. Anderson Cancer Center: 25 years later

The purpose of this study was to review the clinical course of patients diagnosed with vulvar melanoma. Charts of patients diagnosed between 1970 and 1997 were reviewed for demographics, lesion characteristics, disease duration and extent, and treatments. Actuarial survival curves were computed by the Kaplan Meier method and compared by Cox proportional hazards regressions. Fifty-one patients (median age 54) with vulvar melanoma presented with a vulvar mass (39%), pain (30%), bleeding (24%), and itching (20%). Anatomical distribution was mucosa of the vulva (65%), vulvar epidermal site (21%), or unspecified vulva (14%), with 20% having multifocal disease at diagnosis. Histologic types were superficial spreading or nodular (50% each). Median lesion characteristics were diameter 2 cm, Breslow index 4.4 mm, and Clark level IV. Distribution of patients per American Joint Committee on Cancer (AJCC) stage was 29%, 50%, 16%, and 7% for stages I, II, III and IV, respectively. Inguinal node metastases were unilateral in 16% and bilateral in 7%. Despite complete surgical resection, 32 patients (63%) recurred. Median survival for all patients was 41 months (range, 5-324), with 91% 5-year survival for patients with stage I and 31% for stage >or= IIA (P = 0.0002). As with cutaneous melanoma, the AJCC classification, Breslow's thickness, and Clark's levels are the major predictors of overall survival (P = 0.0001 each) and disease-free survival (P <or= 0.0001, 0.0004, and 0.0002, respectively). Surgical techniques do not seem to alter the prognosis. Because vulvar melanoma carries a poor prognosis at early stages, the use of adjuvant therapies needs to be studied prospectively in women affected with this disease.

A novel poly(A)-binding protein gene (PABPC5) maps to an X-specific subinterval in the Xq21.3/Yp11.2 homology block of the human sex chromosomes

The gene-poor human-specific Xq21.3/Yp11.2 block of homology exhibits 99% nucleotide identity, with the exception of an internal X-specific region containing the marker DXS214. This paper describes the characterization of a novel gene (PABPC5) from this X-specific subinterval that belongs to the poly(A)-binding protein gene family. The genomic structure of PABPC5 covers 4061 bp of an uninterrupted open reading frame (ORF) and a 5'UTR spanning across two exons and associated with a CpG island; the potential 382-amino-acid protein contains four RNA recognition motif domains. PABPC5 has 73% nucleotide identity with PABPC4 over 1801 bp of the ORF. At the protein level, 60% identity and 75% similarity are obtained in the comparison with human PABPC4, as well as human, mouse, and Xenopus PABPC1. RT-PCR indicates that PABPC5 is expressed in fetal brain and in a range of adult tissues. Conservation of the PABPC5 ORF and genomic structure is shown in primates and rodents. The close proximity of this gene to translocation breakpoints associated with premature ovarian failure makes it a potential candidate for this condition.

Current management of ALS: comparison of the ALS CARE Database and the AAN Practice Parameter. The American Academy of Neurology

BACKGROUND

The American Academy of Neurology (AAN) ALS Practice Parameter was published in April 1999. The ALS CARE Database has been collecting data on the management of patients with ALS in North America since 1996.

OBJECTIVE

To compare the management of patients with ALS in North America as recorded in the ALS CARE Database with the recommendations of the AAN ALS Practice Parameter.

METHODS

Data were analyzed from 2018 patients at enrollment and from 373 of these patients who died between enrollment and May 1999.

RESULTS

Eighty-two percent of the enrolled patients reported that they had been given enough information about ALS. Only 54% of patients with drooling were receiving medication for this problem. Only 41% of those who reported being depressed most of the time were receiving antidepressant medications. Only 28% of those with dyspnea and only 9.2% of those with a forced vital capacity <40% predicted were receiving noninvasive positive pressure ventilator support. Only 30% of those with moderate to severe dysphagia had a gastrostomy tube. Half of the patients who died did so at home, but only 47% of them received residential hospice services. Although 89% of patients who died were recorded as having done so peacefully, 17% were reported to have had breathing difficulties (i.e., respiratory distress), 8% anxiety, 3.3% pain, and 2.5% choking. Advance directives were in place for 90% of the patients who died, and in 97% of cases these directives were followed.

CONCLUSIONS

These findings indicate that in the 3-year period prior to the publication of the AAN Practice Parameter, many but not all patients received the care that is recommended in that parameter; there were deficiencies, particularly in the key areas of gastrostomy and noninvasive positive pressure ventilation.

From chump to champ: people's appraisals of their earlier and present selves

The authors present and test a theory of temporal self-appraisal. According to the theory, people can maintain their typically favorable self-regard by disparaging their distant and complimenting their recent past selves. This pattern of appraisals should be stronger for more important attributes because of their greater impact on self-regard and stronger for self-ratings than for ratings of other people. Studies 1 and 2 demonstrated that participants are more critical of distant past selves than of current selves, and Study 3 showed that this effect is obtained even when concurrent evaluations indicate no actual improvement. Studies 4 and 5 revealed that people perceived greater improvement for self than for acquaintances and siblings over the same time period. Study 6 provided support for the predicted effects of temporal distance and attribute importance on people's evaluation of past selves.

Trust and communicated attributions in close relationships

The attributional statements intimate partners communicate to one another were examined as a function of trust. In discussions by 35 married couples, 850 attributions and corresponding events were coded on dimensions of valence, globality, and locus. Results of regression and contingency analyses indicate that attributional statements expressed in high-trust relationships emphasized positive aspects of the relationship. Medium-trust couples actively engaged issues but focused more on negative events and explanations. Low-trust couples expressed more specific, less affectively extreme attributional statements that minimized the potential for increased conflict. Results could not be accounted for by relationship satisfaction. These findings also highlight the importance of focusing on features of the events for which attributions are expressed.

High-pressure melting curves of argon, krypton, and xenon: deviation from corresponding states theory

The melting curves of argon, krypton, and xenon were measured in a laser heated diamond-anvil cell to pressures of nearly 80 GPa reaching melting temperatures around 3300 K. For the three gases, we observed a considerable decrease in the melting slopes (dT/dP) from the predictions based on corresponding states scaling starting near 40, 30, and 20 GPa, respectively. The melting anomaly can be understood in terms of a model in which hcp stacking faults act as solutes in a binary system.

Sequence analysis and transcript identification within 1.5 MB of DNA deleted together with the NDP and MAO genes in atypical Norrie disease patients presenting with a profound phenotype

Mutations at the Norrie disease gene locus, NDP, manifest in a broad range of defects. These range from a relatively mild, late-onset, exudative vitreoretinopathy to congenital blindness and sensorineural deafness combined, in some cases, with mental retardation. In addition, extensive deletions involving the NDP locus, located at Xp11.3, the adjacent monoamine oxidadase genes MAOA and MAOB, and additional material, result in a more severe pattern of symptoms. The phenotypes include all or some of the following; mental retardation, involuntary movements, hypertensive crises and hypogonadism. We extended an existing YAC contig to embrace the boundaries of three of the largest deletions and converted this into four PAC contigs. Computer analysis and experimental data have resulted in the identification of several putative loci, including a phosphatase inhibitor 2-like gene (dJ154.1) and a 250-bp sequence which resembles a homeobox domain (dA113.3), 1.2 Mb and 400 kb respectively from the MAO/NDP cluster. The pattern of expression of dJ154.1 suggests that it may represent an important factor contributing to the complex phenotypes of these deletion patients. Hum Mutat 17:523, 2001.

Wireless telephones and hearing aids: an overview

Wireless telephones are becoming increasingly common and will be more so in the future. Unfortunately, many are unusable with hearing aids and may actively interfere with the normal use of hearing aids because of the electromagnetic interference (EMI) generated by wireless telephones. The EMI generated by digital wireless telephones is much greater than that of analog wireless telephones. More research and design work needs to be done before wireless telephones can be considered accessible to people who use hearing aids.

Phase III randomized trial of gabapentin in patients with amyotrophic lateral sclerosis

BACKGROUND

Preclinical and clinical studies of gabapentin in patients with ALS led the authors to undertake a phase III randomized clinical trial.

METHODS

Patients were randomly assigned, in a double-blinded fashion, to receive oral gabapentin 3,600 mg or placebo daily for 9 months. The primary outcome measure was the average rate of decline in isometric arm muscle strength for those with two or more evaluations.

RESULTS

Two hundred four patients enrolled, 196 had two or more evaluations, and 128 patients completed the study. The mean rate of decline of the arm muscle strength was not significantly different between the groups. Moreover, there was no beneficial effect upon the rate of decline of other secondary measures (vital capacity, survival, ALS functional rating scale, timed walking) nor was there any symptomatic benefit. In fact, analysis of the combined data from the phase II and III trials revealed a significantly more rapid decline of forced vital capacity in patients treated with gabapentin.

CONCLUSION

These data provide no evidence of a beneficial effect of gabapentin on disease progression or symptoms in patients with ALS.

Smoking amongst UK Bangladeshi adolescents aged 14-15

This paper reports on an investigation into smoking amongst 14- to 15-year-old Bangladeshis living in an UK inner city locality. A survey using self-completion questionnaires was undertaken in conjunction with focus group discussions. The survey of 316 Bangladeshi adolescents was conducted to determine smoking prevalence. Regular smoking was more common amongst Bangladeshi males (39%) than amongst Bangladeshi females (11%). Thirty-one people (17 females and 14 males) took part in seven focus groups (four female and three male) which were conducted in schools (six) and youth clubs (one). Focus group discussions were conducted to examine what smoking means to Bangladeshi teenagers and factors which influence why they do or do not smoke. Differences between what smoking means to Bangladeshi females and males are identified which arise from perceived social norms and cultural values, and greatly influence smoking uptake. However, many of the reasons why Bangladeshi adolescents continue to smoke, stop smoking or never smoke appear similar to those identified in other studies with largely white adolescents. Factors underpinning adolescent choices together with the implications of the study findings for the development of smoking prevention initiatives for inner city Bangladeshi teenagers are discussed.

From chump to champ: people's appraisals of their earlier and present selves

The authors present and test a theory of temporal self-appraisal. According to the theory, people can maintain their typically favorable self-regard by disparaging their distant and complimenting their recent past selves. This pattern of appraisals should be stronger for more important attributes because of their greater impact on self-regard and stronger for self-ratings than for ratings of other people. Studies 1 and 2 demonstrated that participants are more critical of distant past selves than of current selves, and Study 3 showed that this effect is obtained even when concurrent evaluations indicate no actual improvement. Studies 4 and 5 revealed that people perceived greater improvement for self than for acquaintances and siblings over the same time period. Study 6 provided support for the predicted effects of temporal distance and attribute importance on people's evaluation of past selves.

Phase II evaluation of bryostatin-1 in metastatic melanoma

In this phase II study we assessed the efficacy of bryostatin-1 (NSC 339555) in metastatic melanoma patients when given intravenously either once a week at a dose of 25 microg/m2 per day over 24 h for 3 weeks or at 40 microg/m2 per day over 72 h every 2 weeks. Treatment courses were repeated every 4 weeks. Patients who had received one prior chemotherapy regimen for advanced melanoma, with or without biotherapy, were randomized to one or the other bryostatin-1 dose schedules until 12 patients were registered to each arm. Because there was one confirmed response among the 12 patients who received the 72 h dose schedule, 25 more patients were added to that arm. No prophylactic medications were given. Objective tumour measurements were used to assess the efficacy of the regimen. The National Cancer Institutes common toxicity criteria were used to grade reactions. In total, 49 patients with metastatic melanoma, none having symptomatic brain metastasis, were studied. Of these, 12 patients received the 24 h bryostatin-1 regimen, while the remaining 37 received the 72 h regimen. One patient receiving the 72 h regimen had a partial response lasting over 7 months. Muscle pain occurred in over 90% of the patients and was the dose-limiting side effect of the 72 h regimen. Grade 3/4 nausea and vomiting were more common on the 24 h regimen than on the 72 h one (35% versus 5% of patients). There was no therapy-related thrombocytopenia. Neutropenia was mild and mainly limited to patients receiving the 72 h regimen. Bryostatin-1 has limited activity against melanoma when given by 72 h intravenous infusion.