A three-genome phylogeny of malaria parasites (Plasmodium and closely related genera): evolution of life-history traits and host switches.

Phylogenetic analysis of genomic data allows insights into the evolutionary history of pathogens, especially the events leading to host switching and diversification, as well as alterations of the life cycle (life-history traits). Hundreds, perhaps thousands, of malaria parasite species exploit squamate reptiles, birds, and mammals as vertebrate hosts as well as many genera of dipteran vectors, but the evolutionary and ecological events that led to this diversification and success remain unresolved. For a century, systematic parasitologists classified malaria parasites into genera based on morphology, life cycle, and vertebrate and insect host taxa.

A 25-year single institution experience with surgery for primary mediastinal nonseminomatous germ cell tumors.

Background: The treatment of primary mediastinal nonseminomatous germ cell tumors (PMNSGCT) with cisplatin-based chemotherapy, followed by surgical resection of residual disease, has been established. We reviewed our institution's 25-year experience in the cisplatin era to determine surgical risks and predictors of survival after surgery for PMNSGCT.

Methods: A total of 158 patients (mean age, 29 +/- 8 years) who underwent postchemotherapy operations for PMNSGCT were reviewed and multiple variables analyzed.

Does the panel of cytokeratin 20 and androgen receptor antibodies differentiate desmoplastic trichoepithelioma from morpheaform/infiltrative basal cell carcinoma?

Background: Evaluation of androgen receptor (AR) and cytokeratin 20 (CK20) expression can aid in distinguishing between conventional basal cell carcinoma (characteristically AR+, CK20-) and trichoepithelioma (frequently AR-, CK20+). Within these two groups of tumors, morpheaform/infiltrative basal cell carcinoma (mBCC) and desmoplastic trichoepithelioma (DTE) are particularly challenging to differentiate both clinically and histologically. We investigated whether AR and CK20 immunostains may distinguish between mBCC and DTE.

Energy restriction and exercise differentially enhance components of systemic and mucosal immunity in mice.

The prevalence of obesity, an established risk factor for several chronic diseases, including cancer, has risen dramatically over the past 4 decades. Dietary change and/or increased physical activity are the most commonly recommended lifestyle-based strategies for preventing or reversing obesity. One of several physiological systems that may be enhanced by dietary change and exercise is the immune system.

The Seizures and Epilepsy Education (SEE) program for families of children with epilepsy: a preliminary study.

We investigated the usefulness of the Seizures and Epilepsy Education (SEE) program in improving quality of life, management of the seizure condition, and health care utilization in families having a child with epilepsy. Members of 15 families attended the program, with at least one parent from each family represented. Children attended if they were at least 12 years of age.

Research on persistent pain in late life: current topics and challenges.

Older women often experience pain in their daily lives. This article provides an overview of topics addressed in the geriatric pain research published between 1999 and 2004. New areas of emphasis of research have emerged such as the recognition of body mass and weight as a factor in persistent pain, while other areas have expanded, including the focus on pain among elders with cognitive impairments and the use of alternative treatment approaches.

Depressed mood in informal caregivers of individuals with mild cognitive impairment.

This study estimates the prevalence of depressed mood in caregivers of individuals with mild cognitive impairment (MCI) and assesses whether demographics, stressors, intrapsychic strain, and gain are associated with depressed mood. A secondary analysis of baseline data from the Alzheimer's Disease Cooperative Study MCI trial was conducted using a cross-sectional, correlational design. Descriptive statistics to estimate the prevalence of caregiver depressed mood and univariate and block-wise logistic regression analyses were used.

Extreme obesity reduces bone mineral density: complementary evidence from mice and women.

Objective: To evaluate the effects of body adiposity on bone mineral density in the presence and absence of ovarian hormones in female mice and postmenopausal women.

Research Methods And Procedures: We assessed percentage body fat, serum leptin levels, and bone mineral density in ovariectomized and non-ovariectomized C57BL/6 female mice that had been fed various calorically dense diets to induce body weight profiles ranging from lean to very obese. Additionally, we assessed percentage body fat and whole body bone mineral density in 37 overweight and extremely obese postmenopausal women from the Women's Contraceptive and Reproductive Experiences study.

Energy balance and carcinogenesis: underlying pathways and targets for intervention.

The prevalence of obesity, an established epidemiologic risk factor for many cancers, has risen steadily for the past several decades in the U.S. Particularly alarming are the increasing rates of obesity among children, portending continuing increases in the rates of obesity and obesity-related cancers for many years to come.

Concentration-dependent effects of genistein on global gene expression in MCF-7 breast cancer cells: an oligo microarray study.

Breast cancer is the most commonly diagnosed cancer among US women; there is therefore great interest in developing preventive and treatment strategies for this disease. Because breast cancer incidence is much lower in countries where women consume high levels of soy, bioactive compounds in this food source have been studied for their effects on breast cancer. Genistein, found at high levels in soybeans and soy foods, is a controversial candidate breast cancer preventive phytochemical whose effects on breast cells are complex.

High-dose chemotherapy and stem-cell rescue for metastatic germ-cell tumors.

Background: Metastatic testicular tumors that have not been successfully treated by means of initial chemotherapy are potentially curable with salvage chemotherapy.

Methods: We conducted a retrospective review of 184 consecutive patients with metastatic testicular cancer that had progressed after they received cisplatin-containing combination chemotherapy. We gave 173 patients two consecutive courses of high-dose chemotherapy consisting of 700 mg of carboplatin per square meter of body-surface area and 750 mg of etoposide per square meter, each for 3 consecutive days, and each followed by an infusion of autologous peripheral-blood hematopoietic stem cells; the other 11 patients received a single course of this treatment.

Locating pleistocene refugia: comparing phylogeographic and ecological niche model predictions.

Ecological niche models (ENMs) provide a means of characterizing the spatial distribution of suitable conditions for species, and have recently been applied to the challenge of locating potential distributional areas at the Last Glacial Maximum (LGM) when unfavorable climate conditions led to range contractions and fragmentation. Here, we compare and contrast ENM-based reconstructions of LGM refugial locations with those resulting from the more traditional molecular genetic and phylogeographic predictions. We examined 20 North American terrestrial vertebrate species from different regions and with different range sizes for which refugia have been identified based on phylogeographic analyses, using ENM tools to make parallel predictions.

Microarray analysis reveals that leptin induces autocrine/paracrine cascades to promote survival and proliferation of colon epithelial cells in an Apc genotype-dependent fashion.

The imbalance in systemic mediators of inflammation, such as leptin, is thought to be involved in obesity-associated cancers. In addition, systemic endocrine signals can influence the local autocrine/paracrine factors produced within this microenvironment to influence epithelial cell fate. We previously demonstrated that leptin preferentially promotes the survival and proliferation of colon epithelial cells possessing an Apc mutation (IMCE) but not model normal cells (YAMC).

Predicting poor outcome from acute upper gastrointestinal hemorrhage.

Background: Uncertainty about the outcome of acute upper gastrointestinal bleeding often results in a longer-than-necessary hospital stay.

Methods: We derived and internally validated clinical prediction rules (CPRs) to predict outcome from upper gastrointestinal bleeding. This multisite, prospective cohort study involved consecutive patients admitted for acute upper gastrointestinal bleeding.

Carbohydrate versus energy restriction: effects on weight loss, body composition and metabolism.

Background/aims: To compare weight loss, body composition, and metabolic changes in response to carbohydrate versus dietary energy restriction (DER) in obese mice.

Methods: One hundred C57BL/6 mice were randomized into five groups of 20. The group of high-carbohydrate (HC) mice consumed an HC diet ad libitum and the group of high-fat (HF) mice consumed an HF diet ad libitum for 14 weeks.

The association of MRI findings and neuropsychological functioning after the first recognized seizure.

Purpose: To explore relationships between MRI abnormalities of the brain and neuropsychological functioning in children who were evaluated following their first recognized seizure.

Methods: Subjects were children aged 6 to 14 years with a first recognized seizure within the past 3 months who participated in a larger prospective study of child adaptation. The 249 children with neuropsychological testing and neuroimaging were studied.

Academic performance in children with new-onset seizures and asthma: a prospective study.

The purpose of this study was to compare teachers' ratings of academic performance over 24 months between children with new-onset seizures (N=121) and those with new-onset asthma (N=54) aged 4 to 14. At each data collection point (baseline, 12 months, 24 months), children with seizures were placed into two groups according to their recurrent seizure status (yes/no) during that period. Longitudinal linear mixed models were used to explore differences between the asthma group and the two seizure groups and to determine if differences in teachers' ratings of performance in children with seizures were associated with age, gender, or use of medication.

Expression of androgen receptor by fibroepithelioma of Pinkus: evidence supporting classification as a basal cell carcinoma variant?

The classification of fibroepithelioma of Pinkus as basal cell carcinoma or trichoblastoma remains controversial. Immunohistochemical stains for androgen receptor may be useful in differentiating basal cell carcinoma from trichoepithelioma or trichoblastoma. We studied androgen receptor expression in 13 fibroepitheliomas of Pinkus, 11 basal cell carcinomas, 12 trichoepitheliomas, and 3 trichoblastomas.

Temperament, family environment, and behavior problems in children with new-onset seizures.

Children with epilepsy, even those with new-onset seizures, exhibit relatively high rates of behavior problems. The purpose of this study was to explore the relationships among early temperament, family adaptive resources, and behavior problems in children with new-onset seizures. Our major goal was to test whether family adaptive resources moderated the relationship between early temperament dimensions and current behavior problems in 287 children with new-onset seizures.

17beta-Estradiol differentially regulates androgen-responsive genes through estrogen receptor-beta- and extracellular-signal regulated kinase-dependent pathways in LNCaP human prostate cancer cells.

The molecular mechanism underlying the actions of estrogens in normal prostate physiology and prostate cancer development remains unclear. In the present study we tested the hypothesis that estrogens modulate androgen-dependent events in prostate cells by examining the effects of 17beta-estradiol (E2) on androgen-responsive genes (ARGs) in the androgenresponsive LNCaP cells. We found that LNCaP cells express estrogen receptor-beta (ER-beta) as the major form of ER and ER treatment with E2 led to an increase in cell growth.

Youth With Epilepsy: Development of a Model of Children's Attitudes Toward Their Condition.

A model of children's attitudes toward their epilepsy was tested in 173 children (9-14 years) with epilepsy and their parents. Predictor variables tested were child characteristics, family mastery, child worry, child self-efficacy for seizure management, child psychosocial care needs, and seizure variables. Data were analyzed using structural equation modeling, leading to a revised model in which less child worry, greater family mastery, and greater child seizure self-efficacy were directly related to more child positive attitudes.

Patterns of interdialytic weight gain during the first year of hemodialysis.

This retrospective study describes patterns of interdialytic weight gain (IWG) over the first year of hemodialysis in 27 individuals. IWG increased over the first 12 weeks and appeared to reverse after 12 weeks, increasing again after 32 weeks. Interventions may need to occur after the individual has been receiving treatment for 12 weeks; booster interventions may be indicated after 32 weeks.

Effects of strength training on the incidence and progression of knee osteoarthritis.

Objective: Quadriceps weakness is a risk factor for incident knee osteoarthritis (OA). We describe a randomized controlled trial of effects of lower-extremity strength training on incidence and progression of knee OA.

Methods: A total of 221 older adults (mean age 69 years) were stratified by sex, presence of radiographic knee OA, and severity of knee pain, and were randomized to strength training (ST) or range-of-motion (ROM) exercises.

Parasites in a biodiversity hotspot: a survey of hematozoa and a molecular phylogenetic analysis of Plasmodium in New Guinea skinks.

A sample of 204 skinks (Squamata: Scincidae) from 10 genera representing 24 species were collected from 10 different localities in New Guinea and examined for blood parasites. Hemogregarines, trypanosomes, microfilarial worms, and 8 infections showing 2 distinct morphological types of malaria parasites (Plasmodium sp.) were observed.

Psychometric testing of the revised 15-item Bakas Caregiving Outcomes Scale.

Background: Family caregivers of stroke survivors experience a variety of negative social, emotional, and health-related outcomes as a result of providing care.

Objectives: : To psychometrically test the revised 15-item Bakas Caregiving Outcomes Scale (BCOS) measuring life changes specifically resulting from providing care. The original 10-item BCOS was improved by adding five items addressing financial well-being, level of energy, role functioning, physical functioning, and general health.