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1.
J Dent Res ; 102(8): 879-886, 2023 07.
Article de Anglais | MEDLINE | ID: mdl-36908186

RÉSUMÉ

Diabetes mellitus (DM) is a recognized risk factor for dementia, and increasing evidence shows that tooth loss is associated with cognitive impairment and dementia. However, the effect of the co-occurrence of DM and edentulism on cognitive decline is understudied. This 12-y cohort study aimed to assess the effect of the co-occurrence of DM and edentulism on cognitive decline and examine whether the effect differs by age group. Data were drawn from the 2006 to 2018 Health and Retirement Study. The study sample included 5,440 older adults aged 65 to 74 y, 3,300 aged 75 to 84 y, and 1,208 aged 85 y or older. Linear mixed-effect regression was employed to model the rates of cognitive decline stratified by age cohorts. Compared with their counterparts with neither DM nor edentulism at baseline, older adults aged 65 to 74 y (ß = -1.12; 95% confidence interval [CI], -1.56 to -0.65; P < 0.001) and those aged 75 to 84 y with both conditions (ß = -1.35; 95% CI, -2.09 to -0.61; P < 0.001) had a worse cognitive function. For the rate of cognitive decline, compared to those with neither condition from the same age cohort, older adults aged 65 to 74 y with both conditions declined at a higher rate (ß = -0.15; 95% CI, -0.20 to -0.10; P < 0.001). Having DM alone led to an accelerated cognitive decline in older adults aged 65 to 74 y (ß = -0.09; 95% CI, -0.13 to -0.05; P < 0.001); having edentulism alone led to an accelerated decline in older adults aged 65 to 74 y (ß = -0.13; 95% CI, -0.17 to -0.08; P < 0.001) and older adults aged 75 to 84 (ß = -0.10; 95% CI, -0.17 to -0.03; P < 0.01). Our study finds the co-occurrence of DM and edentulism led to a worse cognitive function and a faster cognitive decline in older adults aged 65 to 74 y.


Sujet(s)
Dysfonctionnement cognitif , Démence , Diabète , Humains , Sujet âgé , Études de cohortes , Diabète/épidémiologie , Dysfonctionnement cognitif/épidémiologie , Dysfonctionnement cognitif/étiologie , Facteurs de risque , Cognition , Démence/épidémiologie , Démence/étiologie
2.
Zootaxa ; 4514(2): 283-292, 2018 Nov 07.
Article de Anglais | MEDLINE | ID: mdl-30486221

RÉSUMÉ

The new genus and species Sotolensis keltoni is described in the Eccritotarsini (Miridae: Bryocorinae) from material collected on expeditions to Durango, Mexico, by Leonard A. Kelton from the Canadian National Collection. All specimens collected were found on sotol, or Dasylirion sp. (Asparagaceae: Nolinoidae). Habitus images and images of the female and male genitalia are included, and a discussion of genital structure evolution is discussed.


Sujet(s)
Heteroptera , Animaux , Canada , Expéditions , Femelle , Mâle , Mexique
3.
Public Health Genomics ; 17(1): 48-60, 2014.
Article de Anglais | MEDLINE | ID: mdl-24435063

RÉSUMÉ

BACKGROUND/AIMS: This study explored the interest in genomic testing for modest changes in colorectal cancer risk and preferences for receiving genomic risk communications among individuals with intermediate disease risk due to a family history of colorectal cancer. METHODS: Surveys were conducted on 272 men and women at intermediate risk for colorectal cancer enrolled in a randomized trial comparing a remote personalized risk communication intervention (TeleCARE) aimed at promoting colonoscopy to a generic print control condition. Guided by Leventhal's Common Sense Model of Self-Regulation, we examined demographic and psychosocial factors possibly associated with interest in SNP testing. Descriptive statistics and logistic regression models were used to identify factors associated with interest in SNP testing and preferences for receiving genomic risk communications. RESULTS: Three-fourths of participants expressed interest in SNP testing for colorectal cancer risk. Testing interest did not markedly change across behavior modifier scenarios. Participants preferred to receive genomic risk communications from a variety of sources: printed materials (69.5%), oncologists (54.8%), primary-care physicians (58.4%), and the web (58.1%). Overall, persons who were unmarried (p = 0.029), younger (p = 0.003) and with greater cancer-related fear (p = 0.019) were more likely to express interest in predictive genomic testing for colorectal cancer risk. In a stratified analysis, cancer-related fear was associated with the interest in predictive genomic testing in the intervention group (p = 0.017), but not the control group. CONCLUSIONS: Individuals with intermediate familial risk for colorectal cancer are highly interested in genomic testing for modest increases in disease risk, specifically unmarried persons, younger age groups and those with greater cancer fear.


Sujet(s)
Tumeurs colorectales/génétique , Tumeurs colorectales/psychologie , Prise de décision , Prédisposition génétique à une maladie/psychologie , Dépistage génétique/statistiques et données numériques , Polymorphisme de nucléotide simple/génétique , Adulte , Sujet âgé , Tumeurs colorectales/diagnostic , Femelle , Humains , Mâle , Adulte d'âge moyen , Facteurs de risque
4.
Clin Toxicol (Phila) ; 51(8): 794-7, 2013.
Article de Anglais | MEDLINE | ID: mdl-23962100

RÉSUMÉ

BACKGROUND: Medical toxicologists are frequently consulted when young patients present with delirium attributed to suspected poisoning. Medical toxicologists should be aware of non-toxicological mimics of delirium. We describe two patients ultimately diagnosed with anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis for which a toxicological consultation was requested to evaluate for neuroleptic malignant syndrome (NMS). CASE 1: A 21 year old male was sent from a psychiatric facility for new, worsening psychotic symptoms. He had autonomic instability, confusion, and hyper-reflexia. He was treated for NMS without improvement, and after an extensive workup was unrevealing, he was discharged home with significant cognitive dysfunction. Stored CSF later tested positive for anti-NMDAR antibodies. CASE 2: A 27 year old female was sent from a psychiatric facility for a seizure and new psychiatric symptoms. She was agitated and had violent, alternating extremity flexion and extension along with autonomic instability. She was treated for NMS, rhabdomyolysis, and rabies before analysis of CSF demonstrated anti-NMDAR antibodies. Treatment included surgical resection of a suspicious ovarian cyst, steroids and IVIG, with moderate improvement. DISCUSSION: Autoimmune syndromes of the central nervous system result from receptor dysfunction after an antibody response to extracellular or intracellular antigens, such as subunits of the NMDA receptor. The NMDA subunits NR2b and NR2a, in addition to the N-terminal region of the glycine binding NR1 subunit, have been implicated. Typical features such as memory loss, movement disorders, and hallucinations reflect the density and distribution of neuronal NDMA receptors. As young people, particularly young women, are predominantly affected, initial symptoms may be attributed to encephalopathy from drug abuse or schizophrenia. Toxicologists may be consulted as many features mimic NMS. Serum and cerebrospinal fluid can be checked for anti-NMDAR antibodies as part of a paraneoplastic or meningioencephalitis panel. Effective treatments have been described and include surgical resection and immunosuppressive medications.


Sujet(s)
Encéphalite à anticorps anti-récepteur N-méthyl-D-aspartate/diagnostic , Autoanticorps/liquide cérébrospinal , Délire avec confusion/diagnostic , Syndrome malin des neuroleptiques/diagnostic , Adulte , Encéphalite à anticorps anti-récepteur N-méthyl-D-aspartate/physiopathologie , Délire avec confusion/physiopathologie , Diagnostic différentiel , Femelle , Humains , Mâle , Syndrome malin des neuroleptiques/physiopathologie , Orientation vers un spécialiste , Jeune adulte
5.
Nature ; 485(7399): 494-7, 2012 May 02.
Article de Anglais | MEDLINE | ID: mdl-22622576

RÉSUMÉ

Warming experiments are increasingly relied on to estimate plant responses to global climate change. For experiments to provide meaningful predictions of future responses, they should reflect the empirical record of responses to temperature variability and recent warming, including advances in the timing of flowering and leafing. We compared phenology (the timing of recurring life history events) in observational studies and warming experiments spanning four continents and 1,634 plant species using a common measure of temperature sensitivity (change in days per degree Celsius). We show that warming experiments underpredict advances in the timing of flowering and leafing by 8.5-fold and 4.0-fold, respectively, compared with long-term observations. For species that were common to both study types, the experimental results did not match the observational data in sign or magnitude. The observational data also showed that species that flower earliest in the spring have the highest temperature sensitivities, but this trend was not reflected in the experimental data. These significant mismatches seem to be unrelated to the study length or to the degree of manipulated warming in experiments. The discrepancy between experiments and observations, however, could arise from complex interactions among multiple drivers in the observational data, or it could arise from remediable artefacts in the experiments that result in lower irradiance and drier soils, thus dampening the phenological responses to manipulated warming. Our results introduce uncertainty into ecosystem models that are informed solely by experiments and suggest that responses to climate change that are predicted using such models should be re-evaluated.


Sujet(s)
Réchauffement de la planète , Modèles biologiques , Périodicité , Phénomènes physiologiques des plantes , Incertitude , Artéfacts , Écosystème , Fleurs/croissance et développement , Fleurs/physiologie , Développement des plantes , Feuilles de plante/croissance et développement , Feuilles de plante/physiologie , Plantes/classification , Reproductibilité des résultats , Sol/composition chimique , Température , Facteurs temps
6.
Curr Pharm Biotechnol ; 13(10): 1971-9, 2012 Aug.
Article de Anglais | MEDLINE | ID: mdl-22352732

RÉSUMÉ

Rapid decontamination of the skin is the single most important action to prevent dermal absorption of chemical contaminants in persons exposed to chemical warfare agents (CWA) and toxic industrial chemicals (TICs) as a result of accidental or intentional release. Chemicals on the skin may be removed by mechanical means through the use of dry sorbents or water. Recent interest in decontamination systems which both partition contaminants away from the skin and actively neutralize the chemical has led to the development of several reactive decontamination solutions. This article will review the recently FDA-approved Reactive Skin Decontamination Lotion (RSDL) and will summarize the toxicity and efficacy studies conducted to date. Evidence of RSDL's superior performance against vesicant and organophosphorus chemical warfare agents compared to water, bleach, and dry sorbents, suggests that RSDL may have a role in mass human exposure chemical decontamination in both the military and civilian arenas.


Sujet(s)
Armes chimiques/isolement et purification , Décontamination/méthodes , Intoxication/prévention et contrôle , Peau/effets des médicaments et des substances chimiques , Administration par voie cutanée , Composés de l'aluminium/administration et posologie , Composés de l'aluminium/effets indésirables , Composés de l'aluminium/usage thérapeutique , Animaux , Armes chimiques/pharmacocinétique , Armes chimiques/intoxication , Réactivateurs de la cholinestérase/administration et posologie , Réactivateurs de la cholinestérase/effets indésirables , Réactivateurs de la cholinestérase/usage thérapeutique , Diacétyle/administration et posologie , Diacétyle/effets indésirables , Diacétyle/analogues et dérivés , Diacétyle/usage thérapeutique , Emballage de médicament , Humains , Composés du magnésium/administration et posologie , Composés du magnésium/effets indésirables , Composés du magnésium/usage thérapeutique , Intoxication/mortalité , Silicates/administration et posologie , Silicates/effets indésirables , Silicates/usage thérapeutique , Peau/métabolisme , Absorption cutanée/effets des médicaments et des substances chimiques , Crème pour la peau , Facteurs temps
7.
Public Health Genomics ; 14(6): 356-70, 2011.
Article de Anglais | MEDLINE | ID: mdl-21540561

RÉSUMÉ

BACKGROUND: Due to disparities in the use of genetic services, there has been growing interest in examining beliefs and attitudes related to genetic testing for breast and/or ovarian cancer risk among women of African descent. However, to date, few studies have addressed critical cultural variations among this minority group and their influence on such beliefs and attitudes. METHODS: We assessed ethnic, racial and cultural identity and examined their relationships with perceived benefits and barriers related to genetic testing for cancer risk in a sample of 160 women of African descent (49% self-identified African American, 39% Black-West Indian/Caribbean, 12% Black-Other) who met genetic risk criteria and were participating in a larger longitudinal study including the opportunity for free genetic counseling and testing in New York City. All participants completed the following previously validated measures: (a) the multi-group ethnic identity measure (including ethnic search and affirmation subscales) and other-group orientation for ethnic identity, (b) centrality to assess racial identity, and (c) Africentrism to measure cultural identity. Perceived benefits and barriers related to genetic testing included: (1) pros/advantages (including family-related pros), (2) cons/disadvantages (including family-related cons, stigma and confidentiality concerns), and (3) concerns about abuses of genetic testing. RESULTS: In multivariate analyses, several ethnic identity elements showed significant, largely positive relationships to perceived benefits about genetic testing for breast and/or ovarian cancer risk, the exception being ethnic search, which was positively associated with cons/disadvantages, in general, and family-related cons/disadvantages. Racial identity (centrality) showed a significant association with confidentiality concerns. Cultural identity (Africentrism) was not related to perceived benefits and/or barriers. CONCLUSIONS: Ethnic and racial identity may influence perceived benefits and barriers related to genetic testing for breast and/or ovarian cancer risk among at-risk women of African descent. Genetic counseling services may want to take into account these factors in the creation of culturally-appropriate services which best meet the needs of this heterogenous population.


Sujet(s)
Tumeurs du sein/diagnostic , Tumeurs du sein/génétique , Dépistage génétique/méthodes , , Attitude envers la santé , Caraïbe , Études transversales , Caractéristiques culturelles , Ethnies , Femelle , Conseil génétique , Humains , Analyse multifactorielle , New York (ville) , Tumeurs de l'ovaire/génétique , Perception , Risque
8.
Public Health Genomics ; 14(3): 178-89, 2011.
Article de Anglais | MEDLINE | ID: mdl-21464556

RÉSUMÉ

BACKGROUND: Advances in genomics may eventually lead to 'personalized genetic medicine,' yet the clinical utility of predictive testing for modest changes in risk is unclear. We explored interest in genetic testing for genes related to modest changes in breast cancer risk in women at moderate to high risk for breast cancer. METHODS: Women (n = 105) with a negative breast biopsy and ≥1 relative with breast or ovarian cancer completed telephone surveys. We measured demographic and psychosocial variables and, following presentation of hypothetical scenarios of genetic tests for lower-penetrance breast cancer gene mutations, assessed interest in willingness to pay for and comprehension of test results. We used logistic regression models with generalized estimating equations to evaluate combinations of risk level, cost and behavioral modifiers. RESULTS: Many women (77%) reported 'definite' interest in genetic testing, with greater interest in tests that conveyed more risk and cost less. Behavioral modifiers of risk (taking a vitamin; diet/exercise), having a regular physician, greater perceived benefits of genetic testing, and greater cancer worry also influenced interest. Most participants (63%) did not understand relative vs. absolute risk. Women with less understanding reported more cancer worry and greater willingness to pay for testing. CONCLUSION: Interest in genetic testing for mutations related to modest changes in risk was high, modified by both test and psychosocial factors. Findings highlight the need for education about benefits and risks of testing for mutations that convey modest changes in risk, particularly given the current lack of clinical validity/utility and availability of direct-to-consumer genetic testing.


Sujet(s)
Tumeurs du sein/génétique , Prédisposition génétique à une maladie , Dépistage génétique/statistiques et données numériques , Polymorphisme de nucléotide simple , Adulte , Femelle , Humains , Adulte d'âge moyen
9.
Chronobiol Int ; 26(7): 1290-306, 2009 Oct.
Article de Anglais | MEDLINE | ID: mdl-19916832

RÉSUMÉ

Circadian rhythms in behavior and physiology are very different in diurnal and nocturnal rodents. A pacemaker located in the suprachiasmatic nucleus (SCN) of the hypothalamus is responsible for generating and maintaining circadian rhythms in mammals, and cellular and molecular rhythms within the SCN of diurnal and nocturnal rodents are very similar. The neural substrates determining whether an animal has a diurnal or nocturnal phase preference are thus likely to reside downstream of the SCN. The ventral subparaventricular zone (vSPVZ), a major target of the SCN that is important for the expression of circadian rhythmicity in nocturnal lab rats (Rattus norvegicus), exhibits different rhythms in cFos expression in diurnal Nile grass rats compared to lab rats. We examined the effects of chemotoxic lesions of the cFos-expressing cells of the vSPVZ on activity rhythms of grass rats to evaluate the hypothesis that these cells support diurnality in this species. Male grass rats housed in a 12:12 light:dark (LD) cycle were given bilateral injections of the neurotoxin n-methyl-D-L-aspartic acid (NMA) or vehicle aimed at the vSPVZ; cells in the SCN are resistant to NMA, which kills neurons in other brain regions, but leaves fibers of passage intact. vSPVZ-damaged grass rats exhibited highly unstable patterns of activity in constant darkness (DD) and in the LD cycle that followed. However, crepuscular bouts of activity could be seen in all animals with vSPVZ lesions. Damage to the vSPVZ reduced cFos expression in this area but not in the SCN. Using correlational analyses, we found that the number of cFos-ir cells in the vSPVZ was unrelated to several parameters of the activity rhythms during the initial post-surgical period, when animals were in LD. However, the number of cells expressing cFos in the vSPVZ was positively correlated with general activity during the subjective day relative to the subjective night when the animals were switched to DD, and this pattern persisted when a LD cycle was reinstated. Also, the number of cFos-ir cells in the vSPVZ was negatively correlated with the strength of rhythmicity in DD and the number of days required to re-entrain to a LD cycle following several weeks in DD. These data suggest that the vSPVZ emits signals important for the expression of stable diurnal activity patterns in grass rats, and that species differences in these signals may contribute to differences in behavioral and physiological rhythms of diurnal and nocturnal mammals. (Author correspondence: mschw009@umaryland.edu ).


Sujet(s)
Rythme circadien/physiologie , Murinae/physiologie , Noyau paraventriculaire de l'hypothalamus/physiologie , Protéines proto-oncogènes c-fos/physiologie , Animaux , Rythme circadien/effets des médicaments et des substances chimiques , Mâle , Activité motrice/effets des médicaments et des substances chimiques , Activité motrice/physiologie , N-Méthyl-aspartate/administration et posologie , N-Méthyl-aspartate/analogues et dérivés , N-Méthyl-aspartate/toxicité , Neurotoxines/administration et posologie , Neurotoxines/toxicité , Noyau paraventriculaire de l'hypothalamus/effets des médicaments et des substances chimiques , Noyau paraventriculaire de l'hypothalamus/traumatismes , Photopériode , Rats , Spécificité d'espèce
10.
J Biol Rhythms ; 20(6): 526-37, 2005 Dec.
Article de Anglais | MEDLINE | ID: mdl-16275771

RÉSUMÉ

Laboratory populations of grass rats (Arvicanthis niloticus) housed with a running wheel show considerable variation in patterns of locomotor activity. At the extremes are "day-active" (DA) animals with a monophasic distribution of running throughout the light phase and "night-active" (NA) animals exhibiting a biphasic pattern with an extended peak at the beginning of the dark phase and a brief peak shortly before lights-on. Here, the authors use this intraspecific variation to explore interactions between circadian and homeostatic influences on sleep and the effects of these interactions on the activity of brain regions involved in sleep regulation. Male animals were singly housed with running wheels in a 12:12 LD cycle, videotaped for 24 h, and perfused at ZT 4 or 16. Behavioral sleep was scored from the videotapes, and brains were processed for cFos immunoreactivity (cFos-ir). Sleep duration within the light and dark phases was higher in NA and DA animals, respectively, but these groups did not differ with respect to total sleep. In both groups, sleep bouts were shortest in the light phase and longest between ZT 20 and ZT 23. In the ventrolateral preoptic area (VLPO), cFos-ir was higher at ZT 16 than at ZT 4 in DA but not NA grass rats, and it was correlated with behavioral sleep at ZT 16 but not ZT 4. In OXA neurons, cFos-ir was high at ZT 4 in DA grass rats and at ZT 16 in NA grass rats, and it was correlated with behavioral sleep at both times. In the lower subparaventricular zone (LSPV), cFos-ir was higher at ZT 16 in both DA and NA animals, and it was unrelated to behavioral sleep. Thus, patterns of cFos-ir in the LSPV and OXA neurons were most tightly linked to time and sleep, respectively, whereas cFos-ir in the VLPO was influenced by an interaction between these 2 variables.


Sujet(s)
Rythme circadien , Activité motrice , Sommeil , Animaux , Ventricules cérébraux/métabolisme , Collecte de données , Gènes fos , Immunohistochimie , Rats
11.
Neuroscience ; 127(1): 13-23, 2004.
Article de Anglais | MEDLINE | ID: mdl-15219664

RÉSUMÉ

Diurnal and nocturnal species are profoundly different in terms of the temporal organization of daily rhythms in physiology and behavior. The neural bases for these divergent patterns are at present unknown. Here we examine functional differences in the suprachiasmatic nucleus (SCN) and one of its primary targets in a diurnal rodent, the unstriped Nile grass rat (Arvicanthis niloticus) and in a nocturnal one, the laboratory rat (Rattus norvegicus). Grass rats and laboratory rats were housed in a 12:12 light:dark cycle, and killed at six time points. cFos-immunoreactive rhythms in the SCN of grass rats and laboratory rats were similar to those reported previously, with peaks early in the light phase and troughs in the dark phase. However, cFos-immunoreactivity in the lower subparaventricular zone (LSPV) of grass rats rose sharply 5 h into the dark phase, and remained high through the first hour after light onset, whereas in laboratory rats it peaked 1 h after light onset and was low at all other sampling times. Daily cFos rhythms in both the SCN and the LSPV persisted in grass rats, but not in laboratory rats, after extended periods in constant darkness. In grass rats, the endogenous cFos rhythm in the LSPV, but not the SCN, was present both in calbindin-positive and in calbindin-negative cells. Cells that expressed cFos at night in the region of the LSPV in grass rats were clearly outside of the boundaries of the SCN as delineated by Nissl stain and immunoreactivity for vasopressin and vasoactive intestinal peptide. The LSPV of the grass rat, a region that receives substantial input from the SCN, displays a daily rhythm in cFos expression that differs from that of laboratory rats with respect to its rising phase, the duration of the peak and its dependence on a light/dark cycle. These characteristics may reflect the existence of mechanisms in the LSPV that enable it to modulate efferent SCN signals differently in diurnal and nocturnal species.


Sujet(s)
Rythme circadien/physiologie , Hypothalamus/métabolisme , Voies nerveuses/métabolisme , Noyau suprachiasmatique/métabolisme , Animaux , Calbindines , Obscurité , Hypothalamus/cytologie , Immunohistochimie , Lumière , Mâle , Voies nerveuses/cytologie , Neurones/cytologie , Neurones/métabolisme , Noyau paraventriculaire de l'hypothalamus/cytologie , Noyau paraventriculaire de l'hypothalamus/métabolisme , Protéines proto-oncogènes c-fos/métabolisme , Rats , Rat Sprague-Dawley , Protéine G liant le calcium S100/métabolisme , Spécificité d'espèce , Noyau suprachiasmatique/cytologie , Régulation positive/physiologie , Peptide vasoactif intestinal/métabolisme , Vasopressines/métabolisme
12.
J Virol ; 75(23): 11664-76, 2001 Dec.
Article de Anglais | MEDLINE | ID: mdl-11689648

RÉSUMÉ

The identification and characterization of host cell membranes essential for positive-strand RNA virus replication should provide insight into the mechanisms of viral replication and potentially identify novel targets for broadly effective antiviral agents. The alphanodavirus flock house virus (FHV) is a positive-strand RNA virus with one of the smallest known genomes among animal RNA viruses, and it can replicate in insect, plant, mammalian, and yeast cells. To investigate the localization of FHV RNA replication, we generated polyclonal antisera against protein A, the FHV RNA-dependent RNA polymerase, which is the sole viral protein required for FHV RNA replication. We detected protein A within 4 h after infection of Drosophila DL-1 cells and, by differential and isopycnic gradient centrifugation, found that protein A was tightly membrane associated, similar to integral membrane replicase proteins from other positive-strand RNA viruses. Confocal immunofluorescence microscopy and virus-specific, actinomycin D-resistant bromo-UTP incorporation identified mitochondria as the intracellular site of protein A localization and viral RNA synthesis. Selective membrane permeabilization and immunoelectron microscopy further localized protein A to outer mitochondrial membranes. Electron microscopy revealed 40- to 60-nm membrane-bound spherical structures in the mitochondrial intermembrane space of FHV-infected cells, similar in ultrastructural appearance to tombusvirus- and togavirus-induced membrane structures. We concluded that FHV RNA replication occurs on outer mitochondrial membranes and shares fundamental biochemical and ultrastructural features with RNA replication of positive-strand RNA viruses from other families.


Sujet(s)
Drosophila melanogaster/virologie , Nodaviridae/physiologie , ARN viral/biosynthèse , Animaux , Technique de Northern , Lignée cellulaire , Drosophila melanogaster/cytologie , Membranes intracellulaires/ultrastructure , Membranes intracellulaires/virologie , Microscopie confocale , Microscopie électronique/méthodes , Microscopie de fluorescence , Mitochondries/ultrastructure , Mitochondries/virologie , Fractions subcellulaires/métabolisme , Protéines virales/métabolisme
13.
Cancer ; 92(4): 932-40, 2001 Aug 15.
Article de Anglais | MEDLINE | ID: mdl-11550168

RÉSUMÉ

BACKGROUND: The recent identification of several BRCA1/BRCA2 founder mutations among Ashkenazi Jewish individuals has led to increased salience of BRCA1/BRCA2 testing for Jewish individuals. Little is known about interest in BRCA1/BRCA2 testing among Ashkenazi Jews from the general population. Furthermore, previous research has not generally evaluated the impact of education on interest in testing among individuals from the general population. The goal of the current study was to examine whether a brief educational booklet regarding BRCA1/BRCA2 testing would influence knowledge, attitudes, and interest in testing among Ashkenazi Jewish women from the general population. METHODS: After a baseline telephone interview, participants were randomized to receive either genetic testing educational print materials (n = 195 women) or general breast cancer education control materials (n = 196 women). One month after receiving these materials, the authors reassessed knowledge, attitudes, and interest in BRCA1/BRCA2 gene testing. RESULTS: Relative to the breast cancer education control materials, the genetic testing education materials led to increased knowledge, increased perception of the risks and limitations of testing, and decreased interest in obtaining a BRCA1/BRCA2 mutation test. CONCLUSIONS: These data indicate that preliminary print education can be used to educate low-risk individuals about BRCA1/BRCA2 genetic testing. This approach may be used to educate low-risk individuals about the benefits and risks/limitations of BRCA1/BRCA2 testing, so that they can make informed decisions about whether to pursue genetic counseling.


Sujet(s)
Tumeurs du sein/génétique , Gène BRCA1 , Conseil génétique , Éducation pour la santé , Connaissances, attitudes et pratiques en santé , Juif/génétique , Protéines tumorales/génétique , Facteurs de transcription/génétique , Protéine BRCA2 , Tumeurs du sein/prévention et contrôle , Prise de décision , Femelle , Dépistage génétique , Humains , Mutation , Brochures , Répartition aléatoire , Risque
14.
Health Psychol ; 20(3): 217-22, 2001 May.
Article de Anglais | MEDLINE | ID: mdl-11403219

RÉSUMÉ

Using the monitoring process model (MPM), the authors examined the immediate effects of coping style and test results on the psychological distress of women at increased risk for breast and/or ovarian cancers. Cases selected for analysis were 107 probands and relatives of positive probands participating in genetic counseling and testing for heritable cancer risk. Specifically, the authors explored the relationships among coping style (high and low monitoring), test results (BRCA1 and BRCA2 mutation carrier and noncarrier status), and psychological distress (state anxiety). Consistent with the MPM, higher monitoring was associated with greater psychological distress while anticipating genetic test results. After test results were disclosed, greater distress was associated with testing positive for a mutation. The implications of the findings for breast and ovarian cancer patients are discussed.


Sujet(s)
Adaptation psychologique , Troubles anxieux/psychologie , Tumeurs du sein/génétique , Tumeurs du sein/psychologie , Gène BRCA1/génétique , Protéines tumorales/génétique , Tumeurs de l'ovaire/génétique , Tumeurs de l'ovaire/psychologie , Facteurs de transcription/génétique , Troubles anxieux/diagnostic , Protéine BRCA2 , Protéines de transport/génétique , Analyse de mutations d'ADN/méthodes , Femelle , Conseil génétique , Humains , Adulte d'âge moyen , Mutation ponctuelle/génétique , Indice de gravité de la maladie
16.
Am J Med Genet ; 98(4): 336-42, 2001 Feb 01.
Article de Anglais | MEDLINE | ID: mdl-11170078

RÉSUMÉ

The use of anonymized stored tissue is a routine practice in genetic research. Investigators who utilize stored samples are neither required nor able to obtain informed consent before each use. Many genetic studies, however, are conducted on specific ethnic populations (e.g., Ashkenazi Jews). The results in these cases, although individually anonymous, are not anonymous with respect to the ethnicity of the participants. This lack of group anonymity has led to concern about the possibility of stigmatization and discrimination based on the results of the genetic research. In the present study we surveyed Jewish individuals about their attitudes regarding the practice of using stored DNA samples for genetic research. Specifically, we were interested in whether attitudes about informed consent and willingness to participate in genetics research using stored DNA would depend on the circumstances in which the material was collected (i.e., clinical setting vs. research setting) and the characteristics of the disease or trait under investigation. Overall, most respondents reported that written informed consent should be required and that they would be willing to provide such consent. Participants were most willing to provide consent, however, when the sample had been collected in a research rather than clinical setting. Further, participants were more likely to endorse the need for obtaining consent when the sample was collected in a clinical setting. Finally, participants were significantly less willing to participate in research that examined stereotypical or potentially stigmatizing traits as opposed to research that examined medical or mental illnesses.


Sujet(s)
ADN/génétique , Consentement libre et éclairé , Adolescent , Adulte , Sujet âgé , Sujet âgé de 80 ans ou plus , Attitude , Collecte de données/statistiques et données numériques , Femelle , Humains , Juif , Mâle , Adulte d'âge moyen , Recherche
17.
Public Health Rep ; 116(6): 590-8, 2001.
Article de Anglais | MEDLINE | ID: mdl-12196619

RÉSUMÉ

OBJECTIVE: Studies have shown that African American men are at greater risk than other men for prostate cancer in terms of both incidence and mortality. At the same time, the utility of screening asymptomatic men for prostate cancer remains controversial. The combination of high incidence and high mortality with the uncertain benefits of screening poses a difficult problem for African American men. This study was part of an ongoing project that sought to develop and evaluate health education materials designed to help African American men make an informed decision about prostate cancer screening. The project represented a collaboration between the Most Worshipful Prince Hall Grand Lodge of the District of Columbia and the Lombardi Cancer Center of Georgetown University. METHODS: The authors conducted eight focus groups with 44 members of the Prince Hall Masons. The focus groups covered men's understanding of prostate cancer screening and their preferences for methods of health education. RESULTS: Participants demonstrated a high level of awareness of the availability of prostate cancer screening, a low awareness of the screening controversy, and a desire for detailed epidemiologic information and information about the benefits and limitations of screening. The preferred forms of educational materials were video and print-based materials, which the research team has recently developed. CONCLUSIONS: These findings demonstrate the feasibility of developing an academic-community collaboration with the goal of improving a health-related problem in the African American community. A randomized trial is underway to evaluate the impact of the video and print education materials.


Sujet(s)
Centres hospitaliers universitaires , /psychologie , Planification de la santé communautaire/organisation et administration , Comportement coopératif , Éducation pour la santé/organisation et administration , Connaissances, attitudes et pratiques en santé , Recherche sur les services de santé/organisation et administration , Dépistage de masse/statistiques et données numériques , Organisations sans but lucratif , Acceptation des soins par les patients/ethnologie , Tumeurs de la prostate/ethnologie , Établissements de cancérologie/organisation et administration , Prise de décision , District de Columbia/épidémiologie , Études de faisabilité , Groupes de discussion , Humains , Mâle , Tumeurs de la prostate/mortalité , Facteurs de risque , Matériel d'enseignement
18.
Int J Biometeorol ; 44(2): 97-101, 2000 Aug.
Article de Anglais | MEDLINE | ID: mdl-10993564

RÉSUMÉ

The objectives of this study are to explore the relationships between plant phenology and satellite-sensor-derived measures of greenness, and to advance a new procedure for determining the growing season of land vegetation at the regional scale. Three phenological stations were selected as sample sites to represent different climatic zones and vegetation types in northern China. The mixed data set consists of occurrence dates of all observed phenophases for 50-70 kinds of trees and shrubs from 1983 to 1988. Using these data, we calculated the cumulative frequency of phenophases in every 5-day period (pentad) throughout each year, and also drew the cumulative frequency distribution curve for all station-years, in order to reveal the typical seasonal characteristics of these plant communities. The growing season was set as the time interval between 5% and 95% of the phenological cumulative frequency. Average lengths of the growing season varied between 188 days in the northern, to 259 days in the southern part of the research region. The beginning and end dates of the surface growing season were then applied each year as time thresholds, to determine the corresponding 10-day peak greenness values from normalized difference vegetation index curves for 8-km2 pixels overlying the phenological stations. Our results show that, at the beginning of the growing season, the largest average greenness value occurs in the southern part, then in the northern, and finally the middle part of the research region. In contrast, at the end of the growing season, the largest average greenness value is measured in the northern part, next in the middle and lastly the southern part of the research region. In future studies, these derived NDVI thresholds can be applied to determine the growing season of similar plant communities at other sites, which lack surface phenological data.


Sujet(s)
Surveillance de l'environnement/méthodes , Développement des plantes , Vaisseaux spatiaux , Chine , Écosystème , Dynamique des populations
19.
J Gen Intern Med ; 15(7): 441-50, 2000 Jul.
Article de Anglais | MEDLINE | ID: mdl-10940129

RÉSUMÉ

OBJECTIVE: To assess the association between HMO practice, time pressure, and physician job satisfaction. DESIGN: National random stratified sample of 5,704 primary care and specialty physicians in the United States. Surveys contained 150 items reflecting 10 facets (components) of satisfaction in addition to global satisfaction with current job, one's career and one's specialty. Linear regression-modeled satisfaction (on 1-5 scale) as a function of specialty, practice setting (solo, small group, large group, academic, or HMO), gender, ethnicity, full-time versus part-time status, and time pressure during office visits. "HMO physicians" (9% of total) were those in group or staff model HMOs with > 50% of patients capitated or in managed care. RESULTS: Of the 2,326 respondents, 735 (32%) were female, 607 (26%) were minority (adjusted response rate 52%). HMO physicians reported significantly higher satisfaction with autonomy and administrative issues when compared with other practice types (moderate to large effect sizes). However, physicians in many other practice settings averaged higher satisfaction than HMO physicians with resources and relationships with staff and community (small to moderate effect sizes). Small and large group practice and academic physicians had higher global job satisfaction scores than HMO physicians (P <.05), and private practice physicians had quarter to half the odds of HMO physicians of intending to leave their current practice within 2 years (P <.05). Time pressure detracted from satisfaction in 7 of 10 satisfaction facets (P <.05) and from job, career, and specialty satisfaction (P <.01). Time allotted for new patients in HMOs (31 min) was less than that allotted in solo (39 min) and academic practices (44 min), while 83% of family physicians in HMOs felt they needed more time than allotted for new patients versus 54% of family physicians in small group practices (P <.05 after Bonferroni's correction). CONCLUSIONS: HMO physicians are generally less satisfied with their jobs and more likely to intend to leave their practices than physicians in many other practice settings. Our data suggest that HMO physicians' satisfaction with staff, community, resources, and the duration of new patient visits should be assessed and optimized. Whether providing more time for patient encounters would improve job satisfaction in HMOs or other practice settings remains to be determined.


Sujet(s)
Health Maintenance Organizations (USA)/organisation et administration , Satisfaction professionnelle , Relations médecin-patient , Médecins/psychologie , Stress psychologique , Adulte , Groupes homogènes de malades , Corps enseignant et administratif en médecine/statistiques et données numériques , Femelle , Health Maintenance Organizations (USA)/statistiques et données numériques , Humains , Mâle , Médecine/statistiques et données numériques , Adulte d'âge moyen , Odds ratio , Spécialisation , Enquêtes et questionnaires , Gestion du temps , États-Unis
20.
Cancer Epidemiol Biomarkers Prev ; 9(4): 381-5, 2000 Apr.
Article de Anglais | MEDLINE | ID: mdl-10794482

RÉSUMÉ

Despite widespread access to genetic testing for the BRCA1 and BRCA2 breast cancer susceptibility genes, little is known about rates or predictors of test use among individuals from newly ascertained high-risk families who have self-referred for genetic counseling/testing. The objective of this study was to examine rates of test use within this population. In addition, we sought to determine whether spiritual faith and psychological factors influenced testing decisions. Participants were 290 women with familial breast cancer. All were offered genetic counseling and testing for alterations in the BRCA1 and BRCA2 genes. Baseline levels of spiritual faith, cancer-specific distress, perceived risk, and demographic factors were examined to identify independent predictors of whether participants received versus declined testing. The final logistic model revealed statistically significant main effects for spiritual faith [odds ratio (OR), 0.2; 95% confidence intervals (CIs), 0.1 and 0.5] and perceived ovarian cancer risk (OR, 2.4; 95% CIs, 1.3 and 4.7) and a statistically significant spiritual faith by perceived risk interaction effect. Among women who perceived themselves to be at low risk of developing breast cancer again, those with higher levels of spiritual faith were significantly less likely to be tested, compared with those with lower levels of faith (OR, 0.2; 95% CIs, 0.1 and 0.5). However, among women with high levels of perceived risk, rates of test use were high, regardless of levels of spiritual faith (OR, 1.2; 95% CIs, 0.4 and 3.0). These results highlight the role that spirituality may play in the decision-making process about genetic testing.


Sujet(s)
Attitude envers la santé , Tumeurs du sein/génétique , Dépistage génétique , Observance par le patient , Religion et médecine , Adulte , Sujet âgé , Tumeurs du sein/diagnostic , Tumeurs du sein/psychologie , Prise de décision , Femelle , Conseil génétique , Dépistage génétique/psychologie , Humains , Adulte d'âge moyen , Appréciation des risques , Concept du soi
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