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At least 1,423 records · Page 79Linked to original sources
PubMed2005

Is the vascular system a main target for thyroid hormones? From molecular and biochemical findings to clinical perspectives.

The cardiovascular system is an important target for thyroid hormones (THs). Until recently, our understanding of the biological role of THs has been largely based on a catalog of effects observed in excess or deficiency of THs. In the last decades, however, some important progress has been done in defining the molecular and biochemical basis of thyroid hormone action at the cellular and nuclear level. Most of the molecular and cellular mechanisms responsible for the effects of THs on the heart have been clarified, whereas few data are available about the mechanisms of action of THs on the vasculature. Data reported so far describe the thyroid hormone effects on the vascular system as indirect consequences of thermogenic or hemodynamic derangements. The aim of this review is to focus on the direct role of THs in the vascular system, to analyze the main factors involved in this regulatory process, to evaluate the causes of imbalance, their relationships to some pathophysiological conditions, and, finally, to hypothesize effective therapeutic approaches. Our review considers data on the molecular and biochemical properties of iodothyronine deiodinases, with particular attention to D2, the enzyme for the local conversion of the precursor thyroxine (T4) into the biologically active triiodothyronine (T3). We summarize data on the deiodinase tissue distribution, subcellular localization, topology and structure-activity relationships. We also discuss the physiological role of deiodinases and their involvement in the TH-mediated regulation of vascular function.

Amino Acid Sequence↗
PubMed2006

Vulnerability assessment of New Jersey's food supply to invasive species: the New Jersey IMPORT project.

The United States' environment and economy have been severely impacted by unintentionally introduced biological organisms for the last 100 years. Our ecosystems and biological reserves of conservation importance are regularly invaded by non-indigenous species. To help prevent future invaders from entering the ports, this project undertaken at the Port of Elizabeth proposed to: 1. Catalog the different vegetable and fruit crops entering this country; 2. Evaluate the potential risk to New Jersey crops that an introduced exotic pest might pose; and 3. Evaluate the potential that imported crops entering the U.S. have for harboring exotic pests. The New Jersey IMPORT report, or Invasive Management Promoting Open and Responsible Trade project, details a newly designed ecological risk assessment tool to evaluate entry potential of invasive pests at the Port of Elizabeth. Risk designations were assigned to shipments of four fruits; seven vegetables; and two field/forage crops based on: i) Country of origin; ii) Amounts of commodities imported; and iii) Endemic pests present in exporting countries. Between 5,000 and 180,000 tons of crops were imported into the Port of Elizabeth from October 2001 to 2003. Pest risk analyses were drafted for twenty-five intercepted insects taken from the Port Information Network. In addition, eighteen pest risk analyses were drafted for invasive fungi, bacteria, and viruses of global concern as alerted by ProMed Digest. It was concluded that three crops imported remain at high risk: apples, peppers, and tomatoes. Peaches, soybeans, lettuce, sweet corn, potatoes, squash, and eggplant imported were considered moderate risk. Blueberries, cranberries, and alfalfa were considered low risk.

Animals↗
PubMed2003

The radiation exposure compensation act: what is fair?

In 1990 the U.S. Congress passed a law providing compensation to former uranium miners who became ill while the U.S. Government was the sole purchaser of uranium. Ten years later, in 2000, the law was amended to correct widely perceived problems. We reviewed the content of the Radiation Exposure Compensation Act (RECA) laws and regulations, cataloged complaints about the 1990 law, compared the law to the scientific knowledge base in 1990 and in the present, reviewed the 2000 amendments to RECA, and drew lessons about how such compensation programs might be better structured. We concur with popular sentiment that the 1990 law had numerous flaws, the central one being that it failed to compensate many miners who by most other standards would have been deemed deserving. This problem arose through setting exposure criteria very high (at six to 15 times elevated risk), with a disproportionate burden placed on miners who had smoked. The additional burden on smokers was exacerbated by a very stringent definition of smokers (one pack-year in a lifetime). Federal compensation laws should prioritize payment to deserving claimants rather than excluding un-deserving claimants. Thus, a doubling of risk should be an upper limit for setting an eligibility threshold and a lower "significant contributory effect" standard could be considered more appropriate. Uncertainties in exposure and in dose response should be considered and resolved with a bias toward compensation. Beyond setting appropriate criteria, an active effort is needed to inform potentially eligible people and to assist them in qualifying; the eligibility criteria and the requirements for documentation should be appropriate for Native Americans and other cultural groups. Built-in evaluation mechanisms are needed for all compensation programs to assess whether they are meeting their stated objectives.

Journal Article↗
PubMed1993

Three-dimensional sonographic reconstruction: techniques and diagnostic applications.

In this review, we summarize the techniques of obtaining and reconstructing three-dimensional (3D) sonograms in a number of anatomic areas, catalog the clinical efforts at 3D sonography so far, and introduce more recent work in this area that takes advantage of the unique features of sonography. Although it is an active area of 3D imaging research, cardiac 3D imaging is not discussed because it has unique requirements stemming from the heart's anatomic inaccessibility and motion. Image analysis and display also are not covered, as no clear consensus has been reached about the usefulness of the large number of available methods.

Female↗
PubMed1999

An ethogram of body patterning behavior in the biomedically and commercially valuable squid Loligo pealei off Cape Cod, Massachusetts.

Squids have a wide repertoire of body patterns; these patterns contain visual signals assembled from a highly diverse inventory of chromatic, postural, and locomotor components. The chromatic components reflect the activity of dermal chromatophore organs that, like the postural and locomotor muscles, are controlled directly from the central nervous system. Because a thorough knowledge of body patterns is fundamental to an understanding of squid behavior, we have compiled and described an ethogram (a catalog of body patterns and associated behaviors) for Loligo pealei. Observations of this species were made over a period of three years (> or = 440 h) and under a variety of behavioral circumstances. The natural behavior of the squid was filmed on spawning grounds off Cape Cod (northwestern Atlantic), and behavioral trials in the laboratory were run in large tanks. The body pattern components--34 chromatic (including 4 polarization components), 5 postural, and 12 locomotor--are each described in detail. Eleven of the most common body patterns are also described. Four of them are chronic, or long-lasting, patterns for crypsis; an example is Banded Bottom Sitting, which produces disruptive coloration against the substrate. The remaining seven patterns are acute; they are mostly used in intraspecific communication among spawning squids. Two of these acute patterns--Lateral Display and Mate Guarding Pattern--are used during agonistic bouts and mate guarding; they are visually bright and conspicuous, which may subject the squids to predation; but we hypothesize that schooling and diurnal activity may offset the disadvantage presented by increased visibility to predators. The rapid changeability and the diversity of body patterns used for crypsis and communication are discussed in the context of the behavioral ecology of this species.

Animal Communication↗
PubMed2006

Mining the acute respiratory distress syndrome proteome: identification of the insulin-like growth factor (IGF)/IGF-binding protein-3 pathway in acute lung injury.

To obtain a more complete protein profile of the airspace milieu in acute respiratory distress syndrome (ARDS) and to identify new mediators, we analyzed bronchoalveolar lavage fluid (BALF) by shotgun proteomics. Using BALF from three patients, we identified a total of 870 different proteins, a nearly 10-fold increase from previous reports. Among the proteins identified were known markers of lung injury, such as surfactant, proteases, and serum proteins. We also identified several biologically interesting proteins not previously identified in patients with ARDS, including insulin-like growth factor-binding protein-3 (IGFBP-3). Because of the known role of IGFBP-3 in regulating cell survival, we measured IGFBP-3 levels by enzyme-linked immunosorbent assay in ARDS BALF. Normal controls had low levels of IGFBP-3, whereas patients with early ARDS had a significant increase in IGFBP-3. The IGF pathway, acting through the type 1 IGF-receptor, repressed apoptosis of lung fibroblasts but not lung epithelial cells. Furthermore, depletion of IGF in ARDS BALF led to enhanced fibroblast apoptosis. Our data suggest that the IGFBP-3/IGF pathway is involved in the pathogenesis of lung injury, illustrating the power of shotgun proteomics to catalog proteins present in complex biological fluids, such as BALF, from which hypotheses can be developed and tested.

Adult↗
PubMed1989

Apparel shopping behavior of elderly men and women.

70 interested elderly (65 yr. and over) men and women participated in an investigation of older consumers' apparel-shopping behavior and satisfactions and dissatisfactions with available clothing and facilities. Analysis showed that the participants considered shopping ease, wide variety, and label/brand as some of the important factors while shopping for clothes. The respondents were satisfied with good selection, closeness of the mall, and reasonable sales. However, their dissatisfactions ranged from service to fit and size, youthful styles, and abundance of imported clothing. In-store displays, mail order catalogs, and window shopping were the most commonly used sources of apparel information. Several implications of the findings were discussed and suggestions for further research were made.

Aged↗
PubMed2000

Some late nineteenth century perspectives on sex and emotional expression.

A review of nineteenth century popular literature indicates a deep and sustained public interest in sex differences in emotional expression. The conclusions advanced by popular writers included a catalog of perceived sex differences, reinforced by an essentialist philosophy that provided justification for the separation of sexual spheres and restrictions on political, educational, and vocational opportunities for women. Current scientific research on sex differences appears in popular media and is often presented in the context of an essentialist philosophy comparable with that which was dominant in the nineteenth century. Unfortunately, the subtleties and complexities of sex differences are not always communicated to the public and there is thus a potential for misinterpretation or even misuse.

Emotions↗
PubMed2002

UV damage, DNA repair and skin carcinogenesis.

Skin cancer is unique among human cancers in its etiology, accessibility and the volume of detailed knowledge now assembled concerning its molecular mechanisms of origin. The major carcinogenic agent for most skin cancers is well established as solar ultraviolet light. This is absorbed in DNA with the formation of UV-specific dipyrimidine photoproducts. These can be repaired by nucleotide excision repair or replicated by low fidelity class Y polymerases. Insufficient repair followed by errors in replication produce characteristic mutations in dipyrimidine sequences that may represent initiation events in carcinogenesis. Chronic exposure to UVB results in disruption of the epithelial structure and expansion of pre-malignant clones which undergo further genomic changes leading to full malignancy. Genetic diseases in DNA repair, xeroderma pigmentosum, Cockayne syndrome and trichothiodystrophy, show varied elevated symptoms of sun sensitivity involving skin cancers and other symptoms including neurological degeneration and developmental delays. In humans, only xeroderma pigmentosum shows high levels of cancer, but mouse strains, with any of the genes corresponding to these diseases knocked-out, show elevated skin carcinogenesis. The three major skin cancers exhibit characteristic molecular changes defined by certain genes and associated pathways. Squamous cell carcinoma involves mutations in the p53 gene; basal cell carcinoma involves mutations in the PATCHED gene, and melanoma in the p16 gene. The subsequent development of malignant tumors involves many additional genomic changes that have yet to be fully cataloged.

Animals↗
PubMed1994

Chemotaxonomy of Bacteroides: a review.

The loose definition of Bacteroides, some species of which are important etiologic agents of oral diseases, has enabled isolates with only marginal similarities to be reposited in this genus. Many attempts have been made over the years to improve the taxonomy of this heterogeneous group of bacteria. The present article reviews major chemotaxonomic characters and techniques that have been used for this purpose: pigmentation, metabolites, whole-cell fatty acids, phospholipids, isoprenoid quinones, carbohydrates of lipopolysaccharide, whole-cell proteins, peptidoglycans, enzymes, pyrolysis mass spectrometry, DNA composition, restriction fragment length polymorphisms of DNA and ribosomal (r) RNA, homology of DNA and RNA, DNA-rRNA hybridization, and 16S and 5S rRNA oligonucleotide cataloging and sequencing. Despite improvements in their taxonomy, some bacteroides are still misclassified. Suggestions for further improvements in the taxonomy of bacteroides are made.

Bacteroides↗
PubMed1987

Interdisciplinary andrology. STDs. AIDS research.

Multidisciplinary andrology deals with clinical application and modern technology for the evaluation and differential diagnosis of male infertility with emphasis on morphological, anatomical, biochemical, immunological, hereditary, and microbiological parameters. Little is known about the effects of diet, disease, stress, environmental, and drugs on male-related unexplained infertility of couples. Regional, national, and international centers of multidisciplinary andrology should provide (1) extensive and unique clinical services; (2) a computerized "patient referral center," (3) self-learning packages (slides/tape programs) for patients; and (4) a computer link to the National Library of Medicine and the Drug Information Center. Specialized laboratories and clinics can be served by expert consultants, visiting professors, bilingual and well-trained clinicians, nurses, laboratory technologists, computer operators, and related allied health personnel. Patient education pamphlets, updated every few years, can be distributed during training workshops when an extensive network of remote teleprinters can be utilized. Qualified client location may install a printer to allow on-site printing of reports in the shortest possible time. Special mailing containers are provided to clients who wish to mail their laboratory specimens. Other clinical services may include the following: 1. Central source of communication and information in andrology; 2. International roster of multidisciplinary andrology centers; 3. Patient referral to centers and consultations for developing countries; 4. Screening of husbands and wives for in vitro fertilization/embryo transfer (IVF/ET); 5. Screening of couples with unexplained infertility for sexually transmitted diseases (STDs) including AIDS; 6. Exchange of research material and methodology; 7. Coordination of multicenter research; 8. Organizing training workshops for clinicians, nurses, and laboratory technicians; 9. Establishing a repository of films, video tapes, slides, catalogs, instrumentation, books, SEM photos, and atlases; 10. Publication and editorial assistance; 11. Consultation for the appropriate selection, purchase, and quality control of instrumentation (all on one computer system); 12. Evaluation of new diagnostic tools for idiopathic infertility and fertility regulation; 13.(ABSTRACT TRUNCATED AT 400 WORDS)

Acquired Immunodeficiency Syndrome↗
PubMed1979

Standards for accurate in vitro characterization of dialyzers: test case the Vivacell.

A standard format is proposed for cataloging dialyzer transport data in order to improve communication and understanding of published results. The need for such a format is obvious from the ambiguity and lack of uniformity in published data. This report for in vitro characterization also describes an adequate experimental set-up for proper dialyzer characterization and an improved means for reporting uncertainty where curve fitting techniques are employed. The Vivacell dialyzer has been evaluated by these means as the first test case.

Blood↗
PubMedDate not supplied

Cavernous hemangioma of the lung in an infant.

A 10-week-old male was found to have a cavernous hemangioma in the right lower pulmonary lobe. Hemangiomas of the lung are infrequent and in pediatric patients exceptionally rare. This may explain why, among the catalogs of intrapulmonary cystic lesions in children, cavernous hemangioma is a conspicuously absent entity and is rarely imagined in the clinical differential diagnosis. We present one such case, establish its distinction from arteriovenous malformations, and briefly review the available literature.

Diagnosis, Differential↗
PubMed2004

The Opportunities Map at Cornell University: finding direction in dairy production medicine.

Discussion between faculty and interested students revealed the existence of a multitude of opportunities in dairy production medicine at the College of Veterinary Medicine at Cornell University. Many of these were not well known to students, or even to some of the faculty, and the means of accessing specific learning experiences were sometimes obscure. Together, an informal group of faculty, students, and alumni set about cataloging available educational opportunities, resulting in a 31-page publication referred to as the "Opportunities Map." Essentially a student handbook for production medicine students, the Opportunities Map at Cornell helps guide the travel of food animal-interested students through the curriculum without missing the important highlights along the way. The map was originally developed to chronicle the opportunities and resources available to students, but it has also been used to foster face-to-face communications between students and faculty, to welcome incoming students with production animal interests, and to provide a baseline description for further discussion about the curriculum.

Animals↗
PubMed2001

Implementation of a routine genetic evaluation for longevity based on survival analysis techniques in dairy cattle populations in Switzerland.

Genetic evaluation of sires for functional longevity of their daughters based on survival analysis has been implemented in the populations of Braunvieh, Simmental, and Holstein cattle in Switzerland. A Weibull mixed sire-maternal grandsire survival model was used to estimate breeding values of sires with data on cows that calved since April 1, 1980. Data on Braunvieh and Simmental cows included about 1.1 million records, data on Holstein cows comprised about 220,000 records. Data contained approximately 20 to 24% right-censored records and 6 to 9% left-truncated records. Besides the random sire and maternal grandsire effects, the model included effects of herd-year-season, age at first calving, parity, stage of lactation, alpine pasturing (Braunvieh and Simmental), and relative milk yield and relative fat and protein percentage within herd to account for culling for production. Heritability of functional longevity, estimated on a subset of data including approximately 150,000 animals, were 0.181, 0.198, and 0.184 for Braunvieh, Simmental, and Holstein, respectively. Breeding values were estimated for all sires with at least six daughters or three granddaughters in the data. Breeding values of sires are expressed in months of functional productive life and published in sire catalogs along with breeding values for production traits.

Animals↗
PubMed2003

Technical note: Use of RFLP to characterize Lactococcus lactis strains producing exopolysaccharides.

Restriction fragment length polymorphism (RFLP) is used to differentiate microorganisms by analysis of their DNA restriction patterns. A modified RFLP procedure is proposed for the rapid characterization of Lactococcus lactis strains producing exopolysaccharides (EPS). The availability of such effective cataloging system is likely to benefit research aimed at identifying lactococcal strains that produce novel EPS.

DNA, Bacterial↗
PubMed2005

Role of the neurofibromatosis type 2 gene in the development of tumors of the nervous system.

Germ line and somatic mutations in the neurofibromatosis Type 2 (NF2) tumor suppressor gene predispose individuals to tumors of the nervous system, including schwannomas and meningiomas. Since identification of the NF2 gene more than a decade ago, a large body of information has been collected on the nature and consequences of these alterations in patients with NF2 and in individuals in whom sporadic tumors associated with NF2 develop. The catalog of mutations identified thus far has facilitated extensive genetic analysis, including studies of patients with mosaicism and phenotype-genotype correlations, and has also led to experiments that have begun to unravel the molecular biology of the NF2 gene and its role in tumorigenesis. The authors describe some of the most significant findings in NF2 genetics and biology over the last decade.

Animals↗