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PubMed2001

[Antisocial behavior of adolescents and home environment--need for a multidisciplinary model].

In Swedish child and adolescent psychiatry there is a more than 60-year long tradition of using longitudinal methods in research on juvenile delinquency. Since the 1940's, results have been presented using either prospective or retrospective longitudinal designs for this purpose. Starting from genetics as scientific paradigm, new approaches including neuropsychiatry and social psychiatry showed the need for a multidisciplinary view at the border between medicine and behavioral sciences. Both Swedish and international research in the area has clearly demonstrated that factors relating to gender, maturation, resilience vs. vulnerability, the mental health of the parents, the social network and the organization of the school are of importance when trying to understand, prevent and treat juvenile delinquents. The challenge presented to today's and future researchers is to understand how the complexity of the modern western society will impact already established knowledge.

Adolescent↗
PubMed2002

[Exotic invertebrates--a health problem?].

BACKGROUND: Tropical insects and arachnids are becoming popular pets in Norway. Most animals kept are harmless, but some species might cause the need for assistance from the health service. This paper presents tropical arthropods common in captivity and some challenges they might pose to health services. MATERIALS AND METHOD: This article is mainly based on articles collected with the help of Biological Abstracts, Science Citation Index and PubMed. Also, some of the findings are based on the author's experience gained through keeping tropical arthropods for 15 years and participating in international networks. RESULTS AND INTERPRETATION: There is no evidence in the literature that the bite of tarantulas is dangerous. However, the large amounts of urticating hairs in many species can cause skin irritations and serious eye inflammations that can be difficult to treat. The scorpion species imported into the Norwegian pet trade today have no medical significance, but the increasing private import of potential dangerous species via the Internet might change this situation. Walking sticks and mantis are harmless insects that have no medical significance. Most giant millipedes are also harmless, but some species have defence fluids that can cause pathological reactions if exposed to skin, mouth/throat or eyes.

Animals↗
PubMed2003

Biomedical informatics: precious scientific resource and public policy dilemma.

Biomedical informatics includes the application of computers, information networks and systems, and a growing body of scientific understanding to a range of problems. As skill in this field increases and as progress in virtually all modern biomedical science becomes more data intensive, informatics becomes a precious resource. Applications areas include access to knowledge, discovery in genomics, medical records, mathematical modeling, and bioengineering. At the same time, progress in informatics is deeply dependent on resolution of four major public policy issues: digital intellectual property rights, genetic testing protection, medical data privacy, and the role of biomedical data in the context of information warfare and homeland security.

Anatomy, Cross-Sectional↗
PubMed1995

Revelations from a meta database system on environmental health problems.

Harmful effects of environmental pollution to the health status of population is well-known to ecologists and experts on health sciences. However, prevention and protection against such direct environmental hazards to save, or, in a worse case, re-establish the ecological balance are anything but successful. It is true, even if modern monitoring and measuring technology, adequate information systems, and related data bases are available. Precision of measurements and surveys, assessment and evaluation of the relationship between component elements of negative environmental effects on one the one hand, and general health conditions of the population on the other, could be increased by applying methods of informatics i.e., if we carry out a preliminary and professional analysis of the already existing information property. A useful tool for such activities could be the creation and maintenance of an integrated meta-type data base. It is a set sorted by a causal relations group of information that is collected from several databases of different origin, as pre-defined by the task. Our task was to systematize valuable information collected from different fields of science and research (competencies), to compare them with international standard databases, and thus, to discover new inter-relations, create new values. As an input, one could envisage a network of satellite data bases evaluating relevant results of scientists and research institutions. The main database itself could contain standard national and international information on environmental health care. The output of the system could be relational analysis produced by the meta-system on the basis of results provided by the satellite systems. Thus, frequently, even without carrying out a particular survey, one could already suspect that certain environmental health hazards exist, or plan and implement certain measurements and surveys in a more precisely targeted way. An unlimited number of local satellite workstation modules of experts and research institutions may be linked to the meta database. Information property created as a result of special analysis and annotation might create a knowledge basis for free access by participants. Thus not only would their scientific backgrounds be strengthened, but services would also be provided by the meta database which could be diversified continuously. The satellite systems, the sorting and retrieval functions of the database, and its graphical services would provide a loose but flexible micro-computer system that could be linked together by autonomous or networked workstations. Our system is written on FoxPro and uses FoxGraph. At a medium level of capacity, it requires 1 MB free RAM and 14-16 MB fixed memory. The system already shows a certain specialization: the 'PubHealth' system from general issues of environmental health care leans towards problems related to sub-toxic long term effects and correlations to health insurance risk assessment (cost-benefit, risk-benefit analysis). However, new issues are also emerging when experts wish foremost to utilize the philosophy of the system (e.g., epidemiological mental-hygienic surveys related to life style and social status).

Computer Communication Networks↗
PubMed2004

The thioredoxin system--from science to clinic.

The thioredoxin system-formed by thioredoxin reductase and its characteristic substrate thioredoxin-is an important constituent of the intracellular redox milieu. Interactions with many different metabolic pathways such as DNA-synthesis, selenium metabolism, and the antioxidative network as well as significant species differences render this system an attractive target for chemotherapeutic approaches in many fields of medicine-ranging from infectious diseases to cancer therapy. In this review we will present and evaluate the preclinical and clinical results available today. Current trends in drug development are emphasized.

Amino Acid Sequence↗
PubMed2004

Lipids as targeting signals: lipid rafts and intracellular trafficking.

Our view of biological membranes has evolved dramatically over the last few decades. In the bilayer model from Singer & Nicholson (Science 1972;175:720-731), both proteins and lipids freely diffuse within the plane of the membrane. Currently, however, membranes are viewed as a mosaic of different compartments or domains maintained by an active cytoskeleton network (Ritchie et al. Mol Membr Biol 2003; 20:13-18). Due to interactions between membrane components, several types of subdomains can form with different characteristics and functions. Lipids are likely to play an important role in the formation of so-called lipid-enriched microdomains or lipid rafts, adding another order of complexity to the membrane model. Rafts represent a type of domain wherein lipids of specific chemistry may dynamically associate with each other, to form platforms important for membrane protein sorting and construction of signaling complexes (Simons & Toomre. Nat Rev Mol Cell Biol 2000;1:31-39). Currently, there are several hypotheses concerning the nature of rafts (reviewed in (Edidin. Annu Rev Biophys Biomol Struct 2003;32: 257-283; Zurzolo et al. EMBO Rep 2003;4:1117-1121)). The most commonly cited one, proposed by Kai Simons (Simons & Ikonen. Nature 1997;387:569-572; Pralle et al. J Cell Biol 2000;148:997-1008), suggests that rafts are relatively small structures ( approximately 50 nm) enriched in cholesterol and sphingolipids within which associated proteins are likely to be concentrated. Another proposal (Anderson & Jacobson. Science 2002;296:1821-1825) suggests that rafts are constructed of lipid shells. These are small dynamic assemblies wherein 'raft' proteins are preferentially associated with certain types of lipids. These 'shells' are thermodynamically stable mobile entities in the plane of the membrane that are able to target the protein they encase to preexisting rafts/caveolae domains. In this review we summarize the data suggesting a specific role for lipid domains in intracellular trafficking and sorting and present a modification of the raft model that may help explain the observed phenomena.

Animals↗
PubMedDate not supplied

New frontiers in design synthesis.

The Intelligent Synthesis Environment (ISE), which is one of the major strategic technologies under development at NASA centers and the University of Virginia, is described. One of the major objectives of ISE is to significantly enhance the rapid creation of innovative affordable products and missions. ISE uses a synergistic combination of leading-edge technologies, including high performance computing, high capacity communications and networking, human-centered computing, knowledge-based engineering, computational intelligence, virtual product development, and product information management. The environment will link scientists, design teams, manufacturers, suppliers, and consultants who participate in the mission synthesis as well as in the creation and operation of the aerospace system. It will radically advance the process by which complex science missions are synthesized, and high-tech engineering Systems are designed, manufactured and operated. The five major components critical to ISE are human-centered computing, infrastructure for distributed collaboration, rapid synthesis and simulation tools, life cycle integration and validation, and cultural change in both the engineering and science creative process. The five components and their subelements are described. Related U.S. government programs are outlined and the future impact of ISE on engineering research and education is discussed.

Astronauts↗
PubMed1991

A torsion pendulum for measurement of the viscoelasticity of biopolymers and its application to actin networks.

This report describes the design, construction, and method of operation of a torsion pendulum which is specifically designed for the measurement of soft and fragile biopolymer gels. The pendulum can be assembled and employed in a standard biological laboratory and provides data that currently require access to specialized equipment usually limited to physics or material science laboratories. This instrument measures the shear moduli of viscoelastic materials by applying either steady or oscillating shear forces to a disc-shaped sample and measuring the resulting angular displacement of a pendulum attached to one face of the sample. The device is easily constructed using commercially available materials and no specialized machinery. Shear stresses as low as 0.03 Pa and shear rates as low as 0.00003 s-1 can be measured in steady shear experiments, and dynamic shear moduli from 1 to 2500 Pa measured by oscillatory measurements with sample volumes as low as 0.5 ml. The use of the torsion pendulum is illustrated by measuring the effects of two different actin binding proteins on the viscoelasticity of actin filament networks.

Actins↗
PubMed1981

[The Latin American network of biomedical and health information: experience and future development].

One of the problems that have traditionally plagued the teachers and researchers of Latin America in their day-to-day work is a lack of adequate bibliographical information. In an attempt to remedy this situation, in 1968 the Pan American Health Organization set up the Regional Library of Medicine and Health Sciences (BIREME) in the Paulista Medical School in São Paulo under an agreement with the Government of Brazil. In this article the Director of BIREME discusses the present state of an outlook for biomedical information in the Region and summarizes the work done by the Library in recent years. BIREME is doing an outstanding job not only of searching for and disseminating scientific information and training specialized staff, but also of promoting the establishment of national biomedical information subcenters (there are already eighteen in Brazil). It is also the hub of the Latin American network of biomedical and health information. With the help of the National Library of Medicine of the United States, BIREME has succeeded in developing into a center of high prestige in its field. Its most notable accomplishments include the compilation of the Index Medicus Latinoamericano, which is published semiannually since 1979 and embraces the output of 250 scientific publications, thereby filling the major gap that had existed in this field.

Brazil↗
PubMed2003

Longitudinal and horizontal integration of nutrition science into medical school curricula.

The overall goal of our Nutrition Academic Award (NAA) medical nutrition program at Mercer University School of Medicine is to develop, implement and evaluate a medical education curriculum in nutrition and other aspects of cardiovascular disease (CVD) prevention and patient management with emphasis on the training of primary care physicians for medically underserved populations. The curriculum is 1) vertically integrated throughout all 4 y of undergraduate medical education, including basic science, clinical skills, community science and clinical clerkships as well as residency training; 2) horizontally integrated to include allied healthcare training in dietetics, nursing, exercise physiology and public health; and 3) designed as transportable modules adaptable to the curricula of other medical schools. The specific aims of our program are 1) to enhance our existing basic science problem-based Biomedical Problems Program with respect to CVD prevention through development of additional curriculum in nutrition/diet/exercise and at-risk subpopulations; 2) to integrate into our Clinical Skills Program objectives for medical history taking, conducting patient exams, diet/lifestyle counseling and referrals to appropriate allied healthcare professionals that are specific to CVD prevention; 3) to enhance CVD components in the Community Science population-based medicine curriculum, stressing the health-field concept model, community needs assessment, evidence-based medicine and primary care issues in rural and medically underserved populations; 4) to enhance the CVD prevention and patient management component in existing 3rd- and 4th-y clinical clerkships with respect to nutrition/diet/exercise and socioeconomic issues, behavior modification and networking with allied health professionals; and 5) to integrate a nutrition/behavior change component into Graduate Residency Training in CVD prevention.

Bioethics↗
PubMed2002

(Physio)logical circuits: the intellectual origins of the McCulloch-Pitts neural networks.

This article examines the intellectual and institutional factors that contributed to the collaboration of neuropsychiatrist Warren McCulloch and mathematician Walter Pitts on the logic of neural networks, which culminated in their 1943 publication, "A Logical Calculus of the Ideas Immanent in Nervous Activity." Historians and scientists alike often refer to the McCulloch-Pitts paper as a landmark event in the history of cybernetics, and fundamental to the development of cognitive science and artificial intelligence. This article seeks to bring some historical context to the McCulloch-Pitts collaboration itself, namely, their intellectual and scientific orientations and backgrounds, the key concepts that contributed to their paper, and the institutional context in which their collaboration was made. Although they were almost a generation apart and had dissimilar scientific backgrounds, McCulloch and Pitts had similar intellectual concerns, simultaneously motivated by issues in philosophy, neurology, and mathematics. This article demonstrates how these issues converged and found resonance in their model of neural networks. By examining the intellectual backgrounds of McCulloch and Pitts as individuals, it will be shown that besides being an important event in the history of cybernetics proper, the McCulloch-Pitts collaboration was an important result of early twentieth-century efforts to apply mathematics to neurological phenomena.

Biology↗
PubMed1991

Incorporating client-server database architecture and graphical user interface into outpatient medical records.

Computerized medical record systems require structured database architectures for information processing. However, the data must be able to be transferred across heterogeneous platform and software systems. Client-Server architecture allows for distributive processing of information among networked computers and provides the flexibility needed to link diverse systems together effectively. We have incorporated this client-server model with a graphical user interface into an outpatient medical record system, known as SuperChart, for the Department of Family Medicine at SUNY Health Science Center at Syracuse. SuperChart was developed using SuperCard and Oracle SuperCard uses modern object-oriented programming to support a hypermedia environment. Oracle is a powerful relational database management system that incorporates a client-server architecture. This provides both a distributed database and distributed processing which improves performance.

Ambulatory Care Information Systems↗
PubMed2026

A systematic review and network meta-analysis of single nucleotide polymorphisms associated with oral submucous fibrosis risk.

BACKGROUND: Oral submucous fibrosis (OSF) is a chronic and insidious oral disease characterized by hyalinization of the subepithelial connective tissue and progressive fibrosis of the oral submucosa. It is a precancerous condition of oral squamous cell carcinoma. Studies have demonstrated that single nucleotide polymorphisms (SNPs) are closely associated with susceptibility to OSF. This study aims to comprehensively evaluate the association between SNPs and OSF risk and to rank the strength of the association between different genetic models and OSF susceptibility. METHODS: Literature related to OSF was comprehensively searched from PubMed, Web of Science, Embase, Cochrane Library, CNKI, and Wangfang databases up to July 2025. Full-text case-control studies with patients diagnosed with OSF were included. Quality assessment was performed to evaluate the risk of bias. RevMan 5.4, GeMTC 0.14.3, and STATA 17.0 were used for the pairwise and Bayesian network meta-analysis. RESULTS: A total of 24 studies with 2545 cases and 3772 controls, covering 13 SNPs in 11 genes, were included in our meta-analysis. We found that CYP1A1 rs4646903:T>C, CYP1A1 rs1048943:A>G, GSTT1 null genotype, GSTM1 null genotype, and XRCC3 rs861539:C>T were associated with an increased risk of OSF, while MMP2 rs243865:C>T and MMP3 rs3025058: 5A>6A were associated with a decreased risk of OSF. Further Bayesian network meta-analysis indicated the top 5 genetic models with the highest association with OSF risk in network group 1 were the dominant model, homozygous model, allelic model, and recessive model of CYP1A1 rs1048943:A>G (ranked 1-4), and the heterozygous/dominant model of CYP1A1 rs4646903:T>C (both ranked 5). While the allelic models of XRCC3 rs861539:C>T and MMP3 rs3025058: 5A>6A ranked first for predicting OSF in group 2 and group 3, respectively. CONCLUSION: Some specific SNPs are significantly related to the risk of OSF. Among them, the dominant model of CYP1A1 rs1048943:A>G may be the most strongly associated genetic model with OSF risk. Future large-sample, well-designed studies with detailed genotype data are needed to validate the roles of these SNPs in OSF risk.

Humans↗
PubMed2005

Multi-institutional validation study of neural networks to predict duration of stay after laparoscopic radical/simple or partial nephrectomy.

PURPOSE: We developed models to predict post-laparoscopic radical or simple nephrectomy (LapNx) and post-laparoscopic partial nephrectomy (LapPNx) hospital duration of stay (DOS). MATERIALS AND METHODS: We performed a retrospective review (design group) of all 726 patients (July 1997 to April 2004) who underwent LapNx or LapPNx at the Cleveland Clinic Foundation (CCF). Preoperative findings were recorded. Neural network algorithms were designed to predict the DOS before surgery. The models were then tested on a separate 252 patients from 6 different institutions, namely Tulane University Medical School, University of Arkansas for Medical Sciences, Cedars-Sinai Medical Center, University of Iowa, Mayo Clinic at Scottsdale and CCF. RESULTS: In the CCF design groups, the LapNx model accuracy was 73% to 74% and the LapPNx model 73% to 83%. Overall accuracy in the test groups at all 6 institutions was 72% (area under ROC 0.6 to 0.7) for the LapNx model and 52% to 81% (ROC 0.5 to 0.7) for the LapPNx model. CONCLUSIONS: The LapNx model provides 72% accuracy in predicting the DOS at all 6 institutions. The LapPNx model provided fair accuracy only at CCF and Tulane University Medical School. These models may streamline the delivery of care and continued testing will allow for further refinement.

Algorithms↗
PubMed2000

Evaluation of 100 patients for living donor liver transplantation.

The initial success of living donor liver transplantation (LDLT) in the United States has resulted in a growing interest in this procedure. The impact of LDLT on liver transplantation will depend in part on the proportion of patients considered medically suitable for LDLT and the identification of suitable donors. We report the outcome of our evaluation of the first 100 potential transplant recipients for LDLT at the University of Colorado Health Sciences Center (Denver, CO). All patients considered for LDLT had first been approved for conventional liver transplantation by the Liver Transplant Selection Committee and met the listing criteria of United Network for Organ Sharing status 1, 2A, or 2B. Once listed, those patients deemed suitable for LDLT were given the option to consider LDLT and approach potential donors. Donors were evaluated with a preliminary screening questionnaire, followed by formal evaluation. Of the 100 potential transplant recipients evaluated, 51 were initially rejected based on recipient characteristics that included imminent cadaveric transplantation (8 patients), refusal of evaluation (4 patients), lack of financial approval (6 patients), and medical, psychosocial, or surgical problems (33 patients). Of the remaining 49 patients, considered ideal candidates for LDLT, 24 patients were unable to identify a suitable donor for evaluation. Twenty-six donors were evaluated for the remaining 25 potential transplant recipients. Eleven donors were rejected: 9 donors for medical reasons and 2 donors who refused donation after being medically approved. The remaining 15 donor-recipient pairs underwent LDLT. Using our criteria for the selection of recipients and donors for LDLT gave the following results: (1) 51 of 100 potential transplant recipients (51%) were rejected for recipient issues, (2) only 15 of the remaining 49 potential transplant recipients (30%) were able to identify an acceptable donor, and (3) 15 of 100 potential living donor transplant recipients (15%) were able to identify a suitable donor and undergo LDLT. Recipient characteristics and donor availability may limit the widespread use of LDLT. However, careful application of LDLT to patients at greatest risk for dying on the waiting list may significantly reduce waiting list mortality.

Adult↗
PubMed1998

Information literacy: a resource for nurses as lifelong learners.

The use of information technologies throughout the world continues to increase rapidly and inexorably. Information exchange is rapidly becoming a major economic commodity. The short half-life of professional and technical knowledge necessitates nursing graduates having generic qualities that will enable them to adapt to technical change and cope with an 'information overabundant environment'. Today's nurses must have the capacity to access information, both physically and intellectually; that is, they must be information-literate. Nurses need to be discerning information consumers in order to acquire knowledge and skills in relation to their jobs and social roles and as participants of a democratic society. This paper examines information literacy as a critical resource for nurses as lifelong learners, and explores how information literacy is situated in the nursing literature. The authors pose two questions. Firstly, just how information-literate and aware of information literacy is the nursing profession? Secondly, how can the attitudes, skills and knowledge associated with information literacy be fostered, cultivated and attained in nursing education?

Computer Communication Networks↗
PubMed2005

Is local maternity care an optional service in rural communities?

There has been a precipitous decline in the number of rural communities across Canada providing local maternity care. The evidence suggests that the outcome for newborns may be worse as a result. There is also an emerging understanding of the significant physiological and psychosocial consequences for rural parturient women. Because they cannot plan for birth with any certainty, many of them experience labour and delivery in referral communities as a crisis event fraught with anxiety. The literature suggests that, within a regionalized perinatal system, small maternity services can offer safe care provided that an efficient mechanism for intrapartum transfer has been established. This commentary provides recommendations for sustainable maternity care that will meet the needs of women, their families, and maternity caregivers in rural communities. The recommendations stem from a rural maternity care program of research, consultations with communities, and review of relevant epidemiologic and policy literature.

Canada↗