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Bradley N. Metz,Hannah M. Lucas,Ramesh R. Sagili 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.2
Division of labor is a hallmark of eusocial insects and their ecological success can be attributed to it. Honey bee division of labor proceeds along a stereotypical ontogenetic path based on age, modulated by various internal and external stimuli. Brood pheromone is a major social pheromone of the honey bee that has been shown to affect honey bee division of labor. It elicits several physiological and behavioral responses; notably, regulating the timing of the switch from performing in-hive tasks to the initiation of foraging. Additionally, brood pheromone affects future foraging choice. In honey bees, sucrose response threshold is a physiological correlate of age of first foraging and foraging choice. Brood pheromone has been shown to modulate sucrose response threshold in young bees, but its effects on sucrose response thresholds of bees in advanced behavioral states (foragers) are not known. In this study we examined the sucrose response thresholds of two different task groups, foragers (pollen and non-pollen) and non-foraging bees, in response to honey bee brood pheromone. Sucrose response thresholds were not significantly different between brood pheromone treatment and controls among both non-pollen and pollen foragers. However, the sucrose response threshold of non-foraging bees was significantly higher in the brood pheromone treatment group than in the control group. The switch to foraging task is considered a terminal one, with honey bee lifespan being determined at least partially by risks and stress accompanying foraging. Our results indicate that foragers are physiologically resistant to brood pheromone priming of sucrose response thresholds.
Cannabaceae comparative analysis based on plastid genome evolution
Barbosa D’Oliveira Matielo Cristiane,Fernando Metz Geferson,Plá Matielo Lemos Rafael,de Carvalho Victoria Filipe,de Oliveira Camargo Flávio Anastácio,Marcos Stefenon Valdir 한국작물학회 2024 Journal of crop science and biotechnology Vol.27 No.1
Marijuana or hemp (Cannabis sativa L.) of the Cannabaceae family represents one of the most economically important crops within the group that comprises about 170 plant species, some of which are widely used in industry. It is the most consumed, cultivated, and trafficked illicit drug globally, having several hybrids and varieties resulting from crosses, making the distinctions between Cannabis species almost meaningless. In a former study, our research group sequenced and released two cpDNA from Cannabis apprehended by Brazilian Federal Police which we compare with all deposited Cannabaceae complete cpDNA in this work. In countries where planting, marketing, or consumption is prohibited, it is difficult for control and inspection bodies to identify the origin of different strains. Based on this problem, we aim to perform a comparative genomic analysis of the plastid DNA of the Cannabaceae family. We have found evidence that the ndhA intron seems to be an informative region for phylogenetic and evolutive studies in Cannabaceae family. With the results of the present work, we were able to establish the phylogenetic relationships for the Cannabaceae family using the plastid genomes of 35 accessions, between species, subspecies, varieties, and hybrids.
Light-cone divergence in twist-3 correlation functions
Gamberg, L.P.,Hwang, D.S.,Metz, A.,Schlegel, M. Elsevier 2006 Physics letters: B Vol.639 No.5
<P><B>Abstract</B></P><P>It is argued that the definition of the twist-3 transverse momentum dependent correlation functions must be modified if they contain light-like Wilson lines. In the framework of a simple spectator model of the nucleon we show explicitly the presence of a light-cone divergence for a specific twist-3 time-reversal odd parton density. This divergence emerges for all eight twist-3 T-odd correlators and appears also in the case of a quark target in perturbative QCD. The divergence can be removed by using non-light-like Wilson lines. Based on our results we argue that currently there exists no established factorization formula for transverse momentum dependent twist-3 observables in semi-inclusive DIS and related processes.</P>
Autoimmune Diseases Are Linked to Type IIb Autoimmune Chronic Spontaneous Urticaria
Kolkhir Pavel,Altrichter Sabine,Asero Riccardo,Daschner Alvaro,Ferrer Marta,Giménez-Arnau Ana,Hawro Tomasz,Jakob Thilo,Kinaciyan Tamar,Kromminga Arno,Konstantinou George N,Makris Michael,Metz Martin,S 대한천식알레르기학회 2021 Allergy, Asthma & Immunology Research Vol.13 No.4
Purpose Patients with chronic spontaneous urticaria (CSU) have an increased risk for comorbid autoimmune diseases. In this retrospective multicenter study of CSU patients, we evaluated clinical and laboratory features of CSU associated with a higher risk of comorbid autoimmune diseases. Methods We analyzed records of CSU patients (n = 1,199) for a history or presence of autoimmune diseases. Patients were diagnosed with type IIb autoimmune CSU (aiCSU) if all 3 tests were positive: autologous serum skin test (ASST), basophil histamine release assay (BHRA) and/or basophil activation test (BAT), and IgG autoantibodies against FcεRIα/IgE detected by immunoassay. Results Twenty-eight percent of CSU patients had at least 1 autoimmune disease. The most prevalent autoimmune diseases were Hashimoto's thyroiditis (HT) (≥ 21%) and vitiligo (2%). Two percent of CSU patients had ≥ 2 autoimmune diseases, most frequently HT plus vitiligo. Comorbid autoimmune diseases, in patients with CSU, were associated with female sex, a family history of autoimmune diseases, and higher rates of hypothyroidism and hyperthyroidism (P < 0.001). Presence of autoimmune diseases was linked to aiCSU (P = 0.02). The risks of having autoimmune diseases were 1.7, 2.9 and 3.3 times higher for CSU patients with a positive ASST, BHRA and BAT, respectively. In CSU patients, markers for autoimmune diseases, antinuclear antibodies and/or IgG anti-thyroid antibodies were associated with non-response to omalizumab treatment (P = 0.013). Conclusions In CSU, autoimmune diseases are common and linked to type IIb autoimmune CSU. Our results suggest that physicians assess and monitor all adult patients with CSU for signs and symptoms of common autoimmune diseases, especially HT and vitiligo.