A mixed-model approach for estimating drivers of microbiota community composition and differential taxonomic abundance.

Next-generation sequencing (NGS) and metabarcoding approaches are increasingly applied to wild animal populations, but there is a disconnect between the widely applied generalized linear mixed model (GLMM) approaches commonly used to study phenotypic variation and the statistical toolkit from community ecology typically applied to metabarcoding data. Here, we describe the suitability of a novel GLMM-based approach for analyzing the taxon-specific sequence read counts derived from standard metabarcoding data. This approach allows decomposition of the contribution of different drivers to variation in community composition (e.

AKT activation because of PTEN loss upregulates xCT via GSK3β/NRF2, leading to inhibition of ferroptosis in PTEN-mutant tumor cells.

Here, we show that the tumor suppressor phosphatase and tensin homolog deleted from chromosome 10 (PTEN) sensitizes cells to ferroptosis, an iron-dependent form of cell death, by restraining the expression and activity of the cystine/glutamate antiporter system X (xCT). Loss of PTEN activates AKT kinase to inhibit GSK3β, increasing NF-E2 p45-related factor 2 (NRF2) along with transcription of one of its known target genes encoding xCT. Elevated xCT in Pten-null mouse embryonic fibroblasts increases the flux of cystine transport and synthesis of glutathione, which enhances the steady-state levels of these metabolites.

Decomposing phenotypic skew and its effects on the predicted response to strong selection.

The major frameworks for predicting evolutionary change assume that a phenotype's underlying genetic and environmental components are normally distributed. However, the predictions of these frameworks may no longer hold if distributions are skewed. Despite this, phenotypic skew has never been decomposed, meaning the fundamental assumptions of quantitative genetics remain untested.

Functionally distinct T-helper cell phenotypes predict resistance to different types of parasites in a wild mammal.

The adaptive immune system is critical to an effective response to infection in vertebrates, with T-helper (Th) cells pivotal in orchestrating these responses. In natural populations where co-infections are the norm, different Th responses are likely to play an important role in maintaining host health and fitness, a relationship which remains poorly understood in wild animals. In this study, we characterised variation in functionally distinct Th responses in a wild population of Soay sheep by enumerating cells expressing Th-subset specific transcription factors and quantifying Th-associated cytokines.

Worldwide increases in adolescent loneliness.

Introduction: Several studies have documented increases in adolescent loneliness and depression in the U.S., UK, and Canada after 2012, but it is unknown whether these trends appear worldwide or whether they are linked to factors such as economic conditions, technology use, or changes in family size.

Males That Silence Their Father's Genes: Genomic Imprinting of a Complete Haploid Genome.

Genetic conflict is considered a key driver in the evolution of reproductive systems with non-Mendelian inheritance, where parents do not contribute equally to the genetic makeup of their offspring. One of the most extraordinary examples of non-Mendelian inheritance is paternal genome elimination (PGE), a form of haplodiploidy which has evolved repeatedly across arthropods. Under PGE, males are diploid but only transmit maternally inherited chromosomes, while the paternally inherited homologues are excluded from sperm.

Nurse-performed focused ultrasound in the emergency department: A systematic review.

Aim: The objective of this systematic review was to examine the characteristics and diagnostic accuracy of focused ultrasonography performed by emergency nurses.

Background: Focused ultrasonography is a limited, real-time, goal-directed examination performed to answer specific clinical questions. Its use within the ED setting has increased rapidly over the past two decades.

Description of a new species of Ixodes Latreille, 1795 (Acari: Ixodidae) and redescription of I. priscicollaris Schulze, 1932, parasites of New Guinea rodents (Rodentia: Muridae).

Ixodes goliath n. sp. (Acari: Ixodidae), is described based on females collected from the eastern hyomys, Hyomys goliath (Milne-Edwards) (Rodentia: Muridae) from Papua New Guinea.

Characterization of an endoplasmic reticulum retention signal in the rubella virus E1 glycoprotein.

Rubella virus contains three structural proteins, capsid, E2, and E1. E2 and E1 are type I membrane glycoproteins that form a heterodimer in the endoplasmic reticulum (ER) before they are transported to and retained in the Golgi complex, where virus assembly occurs. The bulk of unassembled E2 and E1 subunits are not transported to the Golgi complex.

Timing of breast cancer surgery during the luteal menstrual phase may improve prognosis.

A meta-analysis has been performed of available retrospective reports concerning the 5-15 year disease-free survival of 5,353 premenopausal breast cancer patients operated on either during the follicular or luteal phases of the menstrual cycle. Patients with surgery performed during the luteal phase (d 14-23+) had an overall mean 5% benefit compared to those operated on the follicular phase determined by date of onset of their last menstrual period p = 0.02 by Wilcoxon 2-tailed test.

Timing of breast cancer surgery during the luteal menstrual phase may improve prognosis.

A meta-analysis has been performed of available retrospective reports concerning the 5-15 year disease-free survival of 5,353 premenopausal breast cancer patients operated on either during the follicular or luteal phases of the menstrual cycle. Patients with surgery performed during the luteal phase (d14-23+) had an overall mean 5% benefit compared to those operated on the follicular phase determined by date of onset of their last menstrual period p=0.02 by Wilcoxon 2-tailed test.

Increased catechol estrogen metabolism as a risk factor for nonfamilial breast cancer.

The metabolism of estrone (E1) or estradiol-17 beta (E2) to catechols seldom has been investigated in biochemical studies related to the risk of development of human breast cancer, as a result of the extreme lability and reactivity of these hormones. A method of indirect calculation was developed in which estimated catechol estrogen excretion (ECE) from urinary excretion of E1, E2, and estriol (E3) was used, based on the obligate reciprocal relation between 16 alpha-hydroxylase activity (r3) and estrogen 2/4 hydroxylase function (r2). This relationship is expressed by r2 x r3 = K, the estrogen oxidative constant.

A method for estimating catechol estrogen metabolism from excretion of noncatechol estrogens.

The relationship of catechol estrogen metabolism to disease has seldom been investigated because of analytic difficulties. Estradiol (E2) and estrone (E1) are oxidized simultaneously at either ring A or ring D, and the rate of catechol estrogen formation (r2) is reciprocally related to the rate of 16 alpha-hydroxylation (r3). The rate of ovarian estrogen production (X10) can be summarized as to metabolic outcome: X10 = r10 + r2 + r3 + r(u), where r10 is the loss of E1 and E2 in urine, and ru is the fecal and urinary loss of unknown oxidative products.

Inhibition of radiogenic mammary carcinoma in rats by estriol or tamoxifen.

Mammary carcinomas have been induced by 3.5 Gy whole-body gamma radiation administered at age 40 to 50 days to virgin female Sprague-Dawley rats. In 142 irradiated controls carcinoma incidence averaged 7.

Antimammary carcinogenic activity of 17-alpha-ethinyl estriol.

Both initiation and promotion of dimethylbenz(a)anthracene (DMBA)-induced mammary carcinogenesis were inhibited by prophylactic therapy for 1 to 7 months using 17-alpha-ethinyl-estriol in doses as low as 1.0 microgram/d administered to intact virgin female Sprague-Dawley rats at 35 to 65 days of age. Administration of 638-micrograms single or multiple doses 2 to 3 weeks before DMBA induced a 75% to 85% reduction in cancer incidence after 1 year (P less than 0.