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[Development of a computer-assisted learning program for liver transplantation].

The German Society for Surgery recently decided to rename the "video library" as a "multimedia library", which will include also interactive, nonlinear computerised teachware in surgery. We report on the complex interaction of authors, editor, and the computer-based training laboratory, and the pitfalls with respect to data collection, structure, implementation, and technical aspects of the CD-ROM liver transplantation.

Computer-Assisted Instruction↗

Design and implementation of the Indianapolis Network for Patient Care and Research.

We are creating a health care information network that will link a large community medical record system to three hospital emergency departments, fifty community pharmacies, ten clinics, four health-maintenance organization (HMO) offices, and twelve homeless care sites in Indianapolis, Indiana. This project will test the feasibility of linking care providers across organizational boundaries and measure the benefits of such a network. The network will supply three kinds of information services: a "mini-medical library," patient medical record information, and a citywide prescription database incorporating a computer-based prescription-writing system. The use of medical resources, the cost of care, provider time spent giving care, and providers' opinions of the services will be used as outcomes in randomized clinical trials. Through this project, we hope to expand the information base available to the target care sites; reduce unnecessary testing and increase the efficiency of care in emergency departments; improve emergency department, office, and clinic prescribing patterns; enlarge the consortium of health care providers connected by the network; and develop strategies for successfully implementing a comprehensive city medical record resource.

Ambulatory Care Facilities↗

Longchain polyunsaturated fatty acid supplementation in preterm infants.

BACKGROUND: The n-3 and n-6 essential fatty acids alpha linolenic acid (ALA) and linoleic acid (LA) are the precursors of the n-3 and n-6 longchain polyunsaturated fatty acids (LCPUFA). Controversy exists over whether LCPUFA are essential nutrients for preterm infants who may not be able to synthesise sufficient amounts of LCPUFA to satisfy the needs of the developing brain and retina. OBJECTIVES: The aim of this review is to assess whether supplementation of formula with LCPUFA is safe and of benefit to preterm infants. SEARCH STRATEGY: Trials were identified by MEDLINE (October 2003), Oxford Database of Perinatal Trials, Cochrane Central Register of Controlled Trials (CENTRAL, The Cochrane Library, Issue 2, 2003) and by checking reference lists of relevant articles and conference proceedings. SELECTION CRITERIA: All randomised trials of formula supplemented with LCPUFA and with clinical endpoints were reviewed. DATA COLLECTION AND ANALYSIS: Eleven randomised trials assessing the clinical effects of feeding formula supplemented with LCPUFA were included in the review. MAIN RESULTS: Of the eleven randomised trials included in the review, two of these were not classified as of high quality despite blinded assessment and complete follow-up, due to problems with assessment methodology. VISUAL ACUITY: Visual acuity over the first year was measured by Teller acuity cards in six studies, by VEP in four studies and by ERG in two studies. Most studies found no significant differences in any visual assessment between supplemented and control infants. DEVELOPMENT: Most of the trials have used Bayley Scales of Infant Development (BSID) at 12 to 24 months postterm and shown no significant effect following supplementation. Meta-analysis of BSID of three studies (Fewtrell 2002, O'Connor 2001, van Wezel 2002) shows no significant effect of supplementation on development. Carlson 1993 and Carlson 1996 demonstrated lower novelty preferences (possibly predictive of lower intelligence) in the supplemented compared with the control group. The investigators however concluded that supplemented infants may have more rapid visual information processing given that they had more looks and each look was of shorter duration. GROWTH: Most trials have reported no significant effect of LCPUFA supplementation on growth of preterm infants. Two trials (Carlson 1993, Carlson 1996) suggest that LCPUFA supplemented infants grow less well than controls, possibly due to a reduction in AA levels which occurs when n-3 supplements are used without n-6 supplements. Recent trials with addition of AA to the supplement have reported no significant effect on growth. Fewtrell 2002 reported mild reductions in length and weight z scores at 18 months. Contrary to these results, the meta-analysis of five studies (Uauy 1992, Carlson 1996, Hansen 1997, Vanderhoof 1999, Innis 2002) showed increased weight and length at two months post-term in supplemented infants. SIDE EFFECTS: Uauy 1992 reported no significant effect of LCPUFA supplementation on bleeding time and red cell membrane fragility. REVIEWER'S CONCLUSIONS: Infants enrolled in the trials were relatively mature and healthy preterm infants. Assessment schedule and methodology, dose and source of supplementation and fatty acid composition of the control formula varied between trials. No long-term benefits were demonstrated for infants receiving formula supplemented with LCPUFA. There was no evidence that supplementation of formula with n-3 and n-6 LCPUFA impaired the growth of preterm infants.

Dietary Supplements↗

Computerized graphic display of physiological data collected during human stereotactic surgery.

An on-line computerized graphic display has been developed for use during stereotactic operations. This depicts in the form of figurine charts and alph-numeric symbols, appropriately oriented on saggital brain diagrams, the results of serial threshold stimulation of the brain. The display facilitates choice of target sites and the data can be stored in a tape library from which search-and-plot programs can be activated for any type or combination of types of response.

Brain↗

Coordinated accumulation of (+)-delta-cadinene synthase mRNAs and gossypol in developing seeds of Gossypium hirsutum and a new member of the cad1 family from G. arboreum.

A new member of the (+)-delta-cadinene synthase (CAD1) family was isolated from a Gossypium arboreum cDNA library. This cDNA encodes a protein that showed 97.3%, 96.9%, and 79.2% sequence identities with the proteins encoded by previously isolated cDNAs of cad1-C1, cad1-C14, and cad1-A, respectively. It may be grouped into the cad1-C subfamily as cad1-C2. Seeds of a glanded cotton cultivar, G. hirsutum cv. Sumian-6, were collected at different intervals during maturation, and the cad1 mRNA levels were analyzed by quantitative RT-PCR. The transcripts could be detected in seeds of 27 DPA (days postanthesis) and increased dramatically along with the seed maturation, which coordinated with an increase in sesquiterpene cyclase activities and subsequently the accumulation of gossypol. The transcription level detected with primers specific to cad1-C (including at least C1, C14, and cdn1) was higher than that detected with primers specific to cad1-A, and mRNA was detected also with cad1-C2-specific primers. This investigation indicates that, in developing seeds of the glanded cotton cultivar, genes of both the CAD1-C and CAD1-A subfamilies are expressed and there is an active biosynthesis of cadinene-type sesquiterpenes.

Amino Acid Sequence↗

Diet and mental health in the Arctic: is diet an important risk factor for mental health in circumpolar peoples?--a review.

BACKGROUND: The people living in Arctic and Subarctic environments have adapted to cold temperatures, short growing seasons, and low precipitation, but their traditional ways are now changing due to increased contact with Western society. The rapid alteration of circumpolar cultures has led to generational changes in diet from traditional foods to the processed groceries common in modern stores. OBJECTIVES: Develop a link between changing traditional diets and mental health that may have substantial consequences for circumpolar peoples. METHODS: Review of English language literature pertaining to the northern circumpolar environments of the world that consist of the Arctic and Subarctic areas. Electronic resources such as ISI Web of Science and PubMed were utilized, using keywords such as arctic, circumpolar, diet, omega-3 fatty acids, mental health, seasonal affective disorder, and suicide. In addition, we used the cited references of obtained articles and the extensive University of Alaska Fairbanks library collections to identify additional publications that were not available from the electronic resources. The years covered were not restricted to any particular period, although 83% of the sources were published in the last 16 years. CONCLUSION: The change in traditional diets has already led to increased health problems, such as obesity, cardiovascular disease, and diabetes, while the mental health of circumpolar peoples has also declined substantially during the same time period. The decline in mental health is characterized by increased rates of depression, seasonal affective disorder, anxiety, and suicide, that now often occur at higher rates than in lower-latitude populations. Studies in non-circumpolar peoples have shown that diet can have profound effects on neuronal and brain development, function, and health. Therefore, we hypothesize that diet is an important risk factor for mental health in circumpolar peoples.

Acculturation↗

Calcium channel blockers for preventing acute tubular necrosis in kidney transplant recipients.

BACKGROUND: The incidence of delayed graft function in cadaveric grafts has increased over the last few years due in part to the large demand for cadaveric kidneys necessitating the use of kidneys from marginal donors. Calcium channel blockers have the potential to reduce the incidence of post-transplant acute tubular necrosis (ATN) if given in the peri-operative period. However, there is controversy surrounding their use in this situation with no consensus as to their efficacy. OBJECTIVES: To evaluate the benefits and harms of using calcium channel blockers in the peri-transplant period in patients at risk of ATN following cadaveric kidney transplantation. SEARCH STRATEGY: We searched the Cochrane Renal Group's specialised register, the Cochrane Central Register of Controlled Trials (CENTRAL, in The Cochrane Library issue 2, 2003) MEDLINE (1966 to January 2003) and EMBASE (1980 - January 2003). The Trials Search Coordinator was contacted to develop the search strategy. SELECTION CRITERIA: Randomised controlled trials comparing calcium channel blockers given in the peri-transplant period with controls were included. Quasi-randomised trials were excluded. DATA COLLECTION AND ANALYSIS: Data was extracted and quality assessed independently by two reviewers, with differences resolved by discussion. Dichotomous outcomes are reported as relative risk (RR) and measurements on continuous scales are reported as weighted mean differences (WMD) with 95% confidence intervals (CI). MAIN RESULTS: Nine trials were suitable for inclusion. Treatment with calcium channel blockers in the peri-transplant period was associated with a significant decrease in the incidence of post transplant ATN (RR 0.57, 95%CI 0.40 to 0.82) and delayed graft function (RR 0.44, 95% CI 0.28 to 0.69). There was no difference between control and treatment groups in graft loss, mortality, requirement for haemodialysis. There was insufficient information to comment on adverse events. REVIEWER'S CONCLUSIONS: These results suggest that calcium channel blockers given in the peri-operative period may reduce the incidence of ATN post-transplantation. The result should be treated with caution due to the heterogeneity of the trials which made comparison of studies and pooling of data difficult.

Calcium Channel Blockers↗

Cathepsin K mRNA detection is restricted to osteoclasts during fetal mouse development.

We recently identified a novel cysteine protease, cathepsin K, by random sequencing of an osteoclast cDNA library, and in situ hybridization studies in adult human tissues demonstrated high and specific expression in osteoclasts. To determine whether the expression of cathepsin K mRNA during mouse embryogenesis was more widespread, cryostat sections of early (day 11-13) and late (day 15-17) mouse fetuses were analyzed by in situ hybridization. Serial cross-sections were collected through each fetus, and co-reacted for tartrate-resistant acid phosphatase (TRAP) and nonspecific esterase (NSE), selective markers for the osteoclast, and precursor cells derived from the macrophage/monocyte lineage, respectively. In the 11-13 day fetuses, cathepsin K mRNA was not expressed in any extraskeletal tissue; at this stage of embryogenesis, no osteoclasts are present. However, in the 15-17 day fetuses, a distinctive, developmental stage-dependent pattern of cathepsin K expression was observed in osteoclasts and preosteoclasts at sites of cartilage and bone modeling. Cathepsin K positive osteoclasts differentiated within a peripheral zone of the osteogenic stacked cell layer of the cartilage rudiments (prior to ossification), migrated and/or resorbed the bone collar, and invaded the cartilage core. Furthermore, following the invasive penetration of vasculature into the degenerating cartilage core, the calcified cartilage was resorbed by cathepsin K positive mononuclear osteoclast precursors (NSE+ve, negligible TRAP); cells positive for both enzymes were identified indicative of osteoclast differentiation. The deposition of bone by osteoblasts onto the cartilage remnants is followed by mononucleated and multinucleated osteoclastic resorption; these osteoclasts demonstrated intense cathepsin K expression. Similar expression patterns were observed at sites of intramembranous ossification. No expression was observed in chondrocytes, osteoblasts, marrow, or in any other nonskeletal tissue at these time points. These data indicated that cathepsin K expression during embryogenesis occurred only following the onset of osteoclast differentiation.

Acid Phosphatase↗

Transient neurologic symptoms (TNS) following spinal anaesthesia with lidocaine versus other local anaesthetics.

BACKGROUND: Spinal anaesthesia has been in use since the turn of the late nineteenth century. During the last decade there has been an increase in the number of reports implicating lidocaine as a possible cause of temporary and permanent neurologic complications after spinal anaesthesia. Follow-up of patients who received uncomplicated spinal anaesthesia revealed that some of them developed pain in the lower extremities after an initial full recovery. This painful condition that occurs in the immediate postoperative period was named "transient neurologic symptoms" (TNS). OBJECTIVES: To study the frequency of TNS and neurologic complications after spinal anaesthesia with lidocaine, compared to other local anaesthetics. SEARCH STRATEGY: We searched the Cochrane Controlled Trials Register (CENTRAL), (The Cochrane Library, Issue 1, 2005); MEDLINE (1966 to January 2005); EMBASE (1980 to week 6, 2005); LILACS (March 2005); and handsearched the reference lists of trials and review articles. SELECTION CRITERIA: We included all randomized and pseudo-randomized studies comparing the frequency of TNS and of neurologic complications after spinal anaesthesia with lidocaine as compared to other local anaesthetics. DATA COLLECTION AND ANALYSIS: Two authors independently evaluated the quality of the relevant studies and extracted the data from the included studies. MAIN RESULTS: Fifteen trials, reporting 1437 patients, 120 of whom developed transient neurologic symptoms, were included in the analysis. The use of lidocaine for spinal anaesthesia increased the risk of developing TNS. There was no evidence that this painful condition was associated with any neurologic pathology; the symptoms disappeared spontaneously by the fifth postoperative day. The relative risk (RR) for developing TNS after spinal anaesthesia with lidocaine as compared to other local anaesthetics (bupivacaine, prilocaine, procaine, levobupivacaine and ropivacaine) was 7.16 (95% confidence interval (CI) 4.02, 12.75). AUTHORS' CONCLUSIONS: The risk of developing TNS after spinal anaesthesia with lidocaine was significantly higher than when bupivacaine, prilocaine and procaine were used. The term "TNS", which implies a positive neurologic finding, should not be used for this painful condition. One study about the impact of TNS on patient satisfaction and functional impairment demonstrated that non-TNS patients were more satisfied and had less functional impairment after surgery than TNS patients, but this did not influence their willingness to recommend spinal anaesthesia.

Anesthesia, Spinal↗

Progesterone for preventing pre-eclampsia and its complications.

BACKGROUND: In the past, progesterone has been advocated for prevention of pre-eclampsia and its complications. Although progestogens are not used for this purpose in current clinical practice, it remains relevant to assess the evidence on their possible benefits and harms. OBJECTIVES: To assess the effects of progesterone during pregnancy on the risk of developing pre-eclampsia and its complications. SEARCH STRATEGY: We searched the Cochrane Pregnancy and Childbirth Group's Trials Register (April 2006), the Cochrane Central Register of Controlled Trials (The Cochrane Library 2006, Issue 2), and EMBASE (1974 to August 2005). SELECTION CRITERIA: Randomised trials evaluating progesterone or any other progestogen during pregnancy for prevention of pre-eclampsia and its complications were included. DATA COLLECTION AND ANALYSIS: Two review authors independently assessed studies for inclusion and extracted data. MAIN RESULTS: Two trials of uncertain quality were included (296 women). These trials compared progesterone injections with no progesterone. There was insufficient evidence to demonstrate any clear differences between the two groups on the risk of pre-eclampsia (one trial, 128 women; relative risk (RR) 0.21, 95% confidence interval (CI) 0.03 to 1.77), death of the baby (two trials, 296 women; RR 0.72, 95% CI 0.21 to 2.51), preterm birth (one trial, 168 women; RR 1.10, 95% CI 0.33 to 3.66), small-for-gestational-age babies (one trial, 168 women; RR 0.83, 95% CI 0.19 to 3.57) or major congenital defects (one trial, 168 women; RR 1.65, 95% CI 0.28 to 9.62). There were no reported cases of masculinisation of female babies (one trial, 128 women). Long-term follow up for the children has been reported in one trial, but the data are excluded from the review as 54% were lost to follow up at one year and 80% at 16 years. AUTHORS' CONCLUSIONS: There is insufficient evidence for reliable conclusions about the effects of progesterone for preventing pre-eclampsia and its complications. Therefore, progesterone should not be used for this purpose in clinical practice at present. Unless new and plausible hypotheses emerge for the role of progesterone in development of pre-eclampsia, further trials of progesterone are unlikely to be a priority.

Female↗

TOXMAP: a GIS-based gateway to environmental health resources.

The National Library of Medicine (NLM) has an extensive collection of environmental health information, including bibliographic and technical data on hazardous chemical substances, in its TOXNET databases. TOXNET also provides access to the United States Environment Protection Agency (EPA)'s Toxics Release Inventory (TRI) data, which covers release of specific chemicals via air, water, and land, and by underground injection, as reported by industrial facilities around the United States. NLM has developed a Web-based geographic information system (GIS), TOXMAP , which allows users to create dynamic maps that show where TRI chemicals are released and that provides direct links to information about the chemicals in TOXNET. By extracting the associated regional geographic text terms from the displayed map (e.g., rivers, towns, county, state), TOXMAP also provides customized chemical and/or region-specific searches of NLM's bibliographic biomedical resources. This paper focuses on TOXMAP's features, data accuracy issues, challenges, user feedback techniques, and future directions.

Databases, Factual↗

Imperatives for continuing research education: results of a Medical Library Association survey.

This paper reports the results of a survey assessing the interest of Medical Library Association (MLA) members in acquiring or improving research skills through continuing education (CE). It describes respondents' educational preparation for research and selected research activities, reviews MLA's experiences with offering CE courses on research topics, and discusses MLA's role in providing education to prepare members for research. The paper includes recommendations for improving research skills through CE and other professional activities. Topics of greatest interest to MLA members were survey development, problem identification, evaluation and cost studies, survey methodology, and methods of data collection. Many respondents preferred local courses. Academic health sciences librarians, as a group, were found to be more productive publishers than hospital librarians. Many respondents reported the availability of free or subsidized research-support services, but more than half did not. More than 90% of respondents indicated that MLA should actively encourage, require, or offer research education. A comprehensive plan for obtaining research skills through CE, along with individual self-assessment and counseling, is recommended.

Education, Continuing↗

Buccal or sublingual misoprostol for cervical ripening and induction of labour.

BACKGROUND: This is one of a series of reviews of cervical ripening and labour induction using standardised methodology. Misoprostol administered by the oral and sublingual routes have the advantage of rapid onset of action, while the sublingual and vaginal routes have the advantage of prolonged activity and greatest bioavailability. OBJECTIVES: To determine the effectiveness and safety of misoprostol administered buccally or sublingually for third trimester cervical ripening and induction of labour. SEARCH STRATEGY: We searched the Cochrane Pregnancy and Childbirth Group trials register (8 December 2003), the Cochrane Central Register of Controlled Trials (The Cochrane Library, Issue 4, 2003), and bibliographies of relevant papers. SELECTION CRITERIA: Randomised controlled trials comparing buccal or sublingual misoprostol used for third trimester cervical ripening or labour induction with placebo/no treatment or other methods listed above it on a predefined list of labour induction methods. DATA COLLECTION AND ANALYSIS: A generic strategy was developed to deal with the large volume and complexity of trial data relating to labour induction. Data were extracted onto standardized forms, checked for accuracy, and analysed using RevMan software. MAIN RESULTS: Three studies (502 participants) compared buccal/sublingual misoprostol respectively with a vaginal regimen (200 microg versus 50 microg) and with oral administration (50 versus 50 microg and 50 versus 100microg).The buccal route was associated with a trend to fewer caesarean sections than with the vaginal route (18/73 versus 28/79; relative risk (RR) 0.70; 95% confidence interval (CI) 0.42 to 1.15). There were no significant differences in any other outcomes. When the same dosage was used sublingually versus orally, the sublingual route was associated with less failures to achieve vaginal delivery within 24 hours (12/50 versus 19/50; RR 0.63, 95% CI 0.34 to 1.16), reduced oxytocin augmentation (17/50 versus 23/50; RR 0.74, 95% CI 0.45 to 1.21) and reduced caesarean section (8/50 versus 15/50; RR 0.53, 95% CI 0.25 to 1.14), but the differences were not statistically significant. When a smaller dose was used sublingually than orally, there were no differences in any of the outcomes. REVIEWERS' CONCLUSIONS: Based on only three small trials, sublingual misoprostol appears to be at least as effective as when the same dose is administered orally. There are inadequate data to comment on the relative complications and side-effects. Sublingual or buccal misoprostol should not enter clinical use until its safety and optimal dosage have been established by larger trials.

Administration, Oral↗

A client/server system for Internet access to biomedical text/image databanks.

Internet access to mixed text/image databanks is finding application in the medical world. An example is a database of medical X-rays and associated data consisting of demographic, socioeconomic, physician's exam, medical laboratory and other information collected as part of a nationwide health survey conducted by the government. Another example is a collection of digitized cryosection images, CT and MR taken of cadavers as part of the National Library of Medicine's Visible Human Project. In both cases, the challenge is to provide access to both the image and the associated text for a wide end user community to create atlases, conduct epidemiological studies, to develop image-specific algorithms for compression, enhancement and other types of image processing, among many other applications. The databanks mentioned above are being created in prototype form. This paper describes the prototype system developed for the archiving of the data and the client software to enable a broad range of end users to access the archive, retrieve text and image data, display the data and manipulate the images. System design considerations include; data organization in a relational database management system with object-oriented extensions; a hierarchical organization of the image data by different resolution levels for different user classes; client design based on common hardware and software platforms incorporating SQL search capability, X Window, Motif and TAE (a development environment supporting rapid prototyping and management of graphic-oriented user interfaces); potential to include ultra high resolution display monitors as a user option; intuitive user interface paradigm for building complex queries; and contrast enhancement, magnification and mensuration tools for better viewing by the user.

Anatomy, Cross-Sectional↗

Protection of rhesus macaques against disease progression from pathogenic SHIV-89.6PD by vaccination with phage-displayed HIV-1 epitopes.

The antigenic polymorphism of HIV-1 is a major obstacle in developing an effective vaccine. Accordingly, we screened random peptide libraries (RPLs) displayed on phage with antibodies from HIV-infected individuals and identified an array of HIV-specific epitopes that behave as antigenic mimics of conformational epitopes of gp120 and gp41 proteins. We report that the selected epitopes are shared by a collection of HIV-1 isolates of clades A-F. The phage-borne epitopes are immunogenic in rhesus macaques, where they elicit envelope-specific antibody responses. Upon intravenous challenge with 60 MID50 of pathogenic SHIV-89.6PD, all monkeys became infected; however, in contrast to the naive and mock-immunized monkeys, four of five mimotope-immunized monkeys experienced lower levels of peak viremia, followed by viral set points of undetectable or transient levels of viremia and a mild decline of CD4+ T cells, and were protected from progression to AIDS-like illness. These results provide a new approach to the design of broadly protective HIV-1 vaccines.

AIDS Vaccines↗

Isolation and characterization of Y chromosome sequences from the African malaria mosquito Anopheles gambiae.

The karyotype of the African malaria mosquito Anopheles gambiae contains two pairs of autosomes and a pair of sex chromosomes. The Y chromosome, constituting approximately 10% of the genome, remains virtually unexplored, despite the recent completion of the A. gambiae genome project. Here we report the identification and characterization of Y chromosome sequences of total length approaching 150 kb. We developed 11 Y-specific PCR markers that consistently yielded male-specific products in specimens from both laboratory colony and natural populations. The markers are characterized by low sequence polymorphism in samples collected across Africa and by presence in more than one copy on the Y. Screening of the A. gambiae BAC library using these markers allowed detection of 90 Y-linked BAC clones. Analysis of the BAC sequences and other Y-derived fragments showed massive accumulation of a few transposable elements. Nevertheless, more complex sequences are apparently present on the Y; these include portions of an approximately 48-kb-long unmapped AAAB01008227 scaffold from the whole genome shotgun assembly. Anopheles Y appears not to harbor any of the genes identified in Drosophila Y. However, experiments suggest that one of the ORFs from the AAAB01008227 scaffold represents a fragment of a gene with male-specific expression.

Animals↗

[Information provision for the biomedical sciences in the Netherlands remains safe guarded].

In view of the rapid development of electronic journals covering the biomedical sciences, the Netherlands Institute for Scientific Information Services has decided to review its document delivery services. The Institute will cancel all of its journal subscriptions at the end of 2002. This will not affect services provided to users of the library. Requests for documents from the collection will continue to be honoured. Cooperation with other European libraries, in particular with the German Central Library of Medicine in Cologne, will ensure continued access to a broad collection of journals. However, users will need to ensure that they prepare themselves for the world of digital journals. Document delivery is seen as a substitute for fully-fledged digital access.

Computers↗