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PubMed1990

Toxicological information series, II. A survey of toxicology information.

The structure of toxicology information is outlined. Key resources, both print and electronic, are described and the role of organizations is discussed on national and world levels. The section on computerized information covers systems such as TOXNET, CIS, and the ANSWER workstation.

Dictionaries, Chemical as Topic↗
PubMed2005

Amplification of Terminologia anatomica by French language terms using Latin terms matching algorithm: a prototype for other language.

OBJECTIVE: Terminologia anatomica is the new standard in anatomical terminology. This terminology is available only in Latin and English and its worldwide adoption is subject to the addition of terms from others languages. On the other hand, Nomina anatomica, the previous standard, has been widely translated. Aim of this work was to append foreign terms to Terminologia by using similarity-matching algorithm between its Latin terms and those from Nomina. METHODS: A semi-automatic matching of Latin terms from Terminologia with those of Nomina was performed using a string-to-string distance algorithm and manual assessment. We used a French-Latin version of Nomina together with Terminologia and we suggested French terms for Terminologia. Coverage was evaluated by the number of exact and approximate matches. A target of 78% was set due to the higher number of terms in Terminologia compared to Nomina. Relevance was estimated by manually comparing the meanings of the English and French terms related to the same Latin term. The question was whether they refer to the same anatomical structure. RESULTS: Exact or approximate matches were found for 5982 terms (76.5%) of Terminologia. Our results indicated that more than 75% of the terms from Terminologia came from Nomina, most of them were left unchanged and all were used with the same meaning. CONCLUSION: This method produces relevant results, reaching our 78% target. The method is based only on Latin terms and can be used for other languages. We consider this work as a starting point for adding terms to other knowledge sources, such as the foundational model of anatomy or the Unified Medical Language System (UMLS).

Algorithms↗
PubMed2006

Individualization, globalization and health--about sustainable information technologies and the aim of medical informatics.

This paper discusses aspects of information technologies for health care, in particular on transinstitutional health information systems (HIS) and on health-enabling technologies, with some consequences for the aim of medical informatics. It is argued that with the extended range of health information systems and the perspective of having adequate transinstitutional HIS architectures, a substantial contribution can be made to better patient-centered care, with possibilities ranging from regional, national to even global care. It is also argued that in applying health-enabling technologies, using ubiquitous, pervasive computing environments and ambient intelligence approaches, we can expect that in addition care will become more specific and tailored for the individual, and that we can achieve better personalized care. In developing health care systems towards transinstitutional HIS and health-enabling technologies, the aim of medical informatics, to contribute to the progress of the sciences and to high-quality, efficient, and affordable health care that does justice to the individual and to society, may be extended to also contributing to self-determined and self-sufficient (autonomous) life. Reference is made and examples are given from the Yearbook of Medical Informatics of the International Medical Informatics Association (IMIA) and from the work of Professor Jochen Moehr.

Decision Trees↗
PubMed2006

Publishing nutrition research: a review of study design, statistical analyses, and other key elements of manuscript preparation, Part 1.

To enhance the Journal's position as the premier source for peer-reviewed research in the science of food, nutrition, and dietetics, members of the Board of Editors recognize the importance of providing a resource for researchers to ensure quality and accuracy of reporting in the Journal. This first monograph of a periodic four-part series focuses on the study hypothesis, study design, and collaboration with a statistician. The basics of study design start with a clear hypothesis or research question and a definitive outcome measure. Throughout the development of a research project, the questions of what is to be discovered and why the research is being conducted need to be addressed. Decisions about parameters to measure and study design most appropriate to test a hypothesis create the foundation for future conclusions. Collaboration with a statistician can aid in the research development process. Documentation that coherently communicates the research process will advance the science of evidence-based practice in nutrition and dietetics. Real examples from published literature are provided, as well as references to books and online resources.

Dietetics↗
PubMed2005

A survey of toxic plants on the market in the district of Bamako, Mali: traditional knowledge compared with a literature search of modern pharmacology and toxicology.

In Mali, the empirical knowledge on plant medicine is held by traditional practioners. Scientific studies have been carried on some plants and they have confirmed their local uses, but few data are available on the toxicity of Malian medicinal plants. In the present work, we record the toxic plants used as medicines in the Bamako district, Mali, with the aim to evaluate the knowledge of traditional healers and herbalists on the toxicity of the plant used. A survey was carried out on the market places in the Bamako district and 106 healers and herbalists were interviewed. A survey of the scientific literature was conducted to verify or sustain the claimed toxicological data. Nineteen plants are arranged according to their frequency of quotation based on the questionnaire. The information includes the botanical name, literature survey on the pharmacology of the plants, the healers' knowledge on plant toxicity and its prevention by some of the healers.

Clinical Competence↗
PubMed2004

Precentral gyrus discrepancy in electronic versions of the Talairach atlas.

Electronic versions of the atlas of Talairach and Tournoux, including the Talairach Daemon and the official versions published by Thieme, contain a discrepant region of the precentral gyrus on axial slice +35 mm that extends far forward into the frontal lobe. This area is anatomically incorrect and internally inconsistent within the digital atlas software applications using their multiplanar cross-referencing tools. By cross-referencing the axial, sagittal, and coronal plates from the original printed atlas, we demonstrate that the discrepant area should be labeled middle frontal gyrus. The mislabeled portion encompasses a 3 x 1.5-cm region in the axial plane and has significant implications for sensorimotor studies that rely on the digital atlases for anatomic labeling.

Brain Mapping↗
PubMed2006

Temporal encoding of place sequences by hippocampal cell assemblies.

Both episodic memory and spatial navigation require temporal encoding of the relationships between events or locations. In a linear maze, ordered spatial distances between sequential locations were represented by the temporal relations of hippocampal place cell pairs within cycles of theta oscillation in a compressed manner. Such correlations could arise due to spike "phase precession" of independent neurons driven by common theta pacemaker or as a result of temporal coordination among specific hippocampal cell assemblies. We found that temporal correlation between place cell pairs was stronger than predicted by a pacemaker drive of independent neurons, indicating a critical role for synaptic interactions and precise timing within and across cell assemblies in place sequence representation. CA1 and CA3 ensembles, identifying spatial locations, were active preferentially on opposite phases of theta cycles. These observations suggest that interleaving CA3 neuronal sequences bind CA1 assemblies representing overlapping past, present, and future locations into single episodes.

Action Potentials↗
PubMed2005

Comparison of potentially hepatotoxic drugs among major US drug compendia.

BACKGROUND: Although a large number of drugs include warnings or listed adverse reactions that describe reports of associated hepatotoxicity, the hepatotoxic risk is documented with different definitions in major drug compendia. OBJECTIVES: The purposes of this study were to compare inclusion of potentially hepatotoxic drugs, and analyze the ratings of hepatotoxic risk among major drug compendia. METHODS: To assess the risk of drug-associated hepatotoxicity, we used current literature of epidemiological studies and developed a 4-level rating scale of hepatotoxic drugs: 3, clear literature evidence of life-threatening hepatotoxicity; 2, multiple case reports or significant liver injuries; 1, no significant liver damage has been reported; and 0, no information. All drugs were evaluated using the 5 major US drug compendia: American Hospital Formulary Service (AHFS), United States Pharmacopeia Drug Information (USPDI), Facts and Comparisons (F&C), Physicians' Desk Reference (PDR), and Clinical Pharmacology (CP). Average rating scores were calculated as the sum of each drug rating score divided by the total number of drugs. One-way analysis of variance and independent t tests were conducted to compare the difference among the rating scores. RESULTS: In total, 175 different drugs and 3 therapeutic classes with hepatotoxic effects were identified in the compendia, including 59 antineoplastics, 28 anti-infectives, 17 nonsteroidal anti-inflammatory drugs, 17 antipsychotics or phenothiazine derivatives, 9 angiotensin-converting enzyme inhibitors, 6 anticonvulsants, 4 histamine-2 receptor antagonists, and other drugs. Average rating scores were 1.65 for AHFS, 1.10 for USPDI, 1.27 for F&C, 1.34 for PDR, and 1.61 for CP (F=7.93, P<.0001). The risk categories were significantly different among compendia in 4 therapeutic classes of antipsychotics and/or phenothiazines (F=3.471, P=.011), nonsteroidal anti-inflammatory drugs (F=7.866, P<.0001), antineoplastics (F=2.476, P=.044), anti-infectives (F=2.003, P=.098), and angiotensin-converting enzyme inhibitors (F=38.125, P<.0001). CONCLUSIONS: Rating scores of hepatotoxicity were significantly different among drug compendia. The different compendium put different emphasis on hepatotoxicity severity. Comprehensive evaluations of hepatotoxic-related drugs provide critical information for health practitioners.

Chemical and Drug Induced Liver Injury↗
PubMed2005

Genetic resources for the neonatologist.

Diagnosing genetic disorders and counselling the parents of babies with possible genetic conditions takes up a significant proportion of a neonatologist's clinical time. This article provides a guide to establishing genetic tools and a reference library on a neonatal unit. The availability of good resources may heighten staff awareness of genetic aetiologies in babies with subtle features, and enable possible diagnoses to be considered and a genetics consultation sought. In addition, when a diagnosis is made, information is then readily available to guide the neonatologist in his or her consultations with parents. It is not intended that the tools outlined here should be a replacement for the genetics consultation; their role is merely to facilitate the interaction of neonatologists with geneticists, to the benefit of the parents and the baby.

Databases, Genetic↗
PubMed2006

Review of the toxicity of chemical mixtures: Theory, policy, and regulatory practice.

An analysis of current mixture theory, policy, and practice was conducted by examining standard reference texts, regulatory guidance documents, and journal articles. Although this literature contains useful theoretical concepts, clear definitions of most terminology, and well developed protocols for study design and statistical analysis, no general theoretical basis for the mechanisms and interactions of mixture toxicity could be discerned. There is also a poor understanding of the relationship between exposure-based and internal received dose metrics. This confounds data interpretation and limits reliable determinations of the nature and extent of additivity. The absence of any generally accepted classification scheme for either modes/mechanisms of toxic action or of mechanisms of toxicity interactions is problematic as it produces a cycle in which research and policy are interdependent and mutually limiting. Current regulatory guidance depends heavily on determination of toxicological similarity concluded from the presence of a few prominent constituents, assumed from a common toxicological effect, or presumed from an alleged similar toxic mode/mechanism. Additivity, or the lack of it, is largely based on extrapolation of existing knowledge for single chemicals in this context. Thus, regulatory risk assessment protocols lack authoritative theoretical underpinnings, creating substantial uncertainty. Development of comprehensive classification schemes for modes/mechanisms of toxic action and mechanisms of interaction is needed to ensure a sound theoretical foundation for mixture-related regulatory activity and provide a firm basis for iterative hypothesis development and experimental testing.

Animals↗