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Tetsuya Higashiyama
Many receptor-like kinases localized at the pollen tube tip precisely control tube functions in flowering plants. Two recent reports have identified autocrine peptide ligands and receptor systems, providing insight into the molecular machinery that controls pollen tube growth and termination.
March 19, 2018: Current Biology: CB
Klaus Lunau, Lina An, Miriam Donda, Michele Hohmann, Leonie Sermon, Vanessa Stegmanns
Flower visiting Eristalis hoverflies feed on nectar and pollen and are known to rely on innate colour preferences. In addition to a preference for visiting yellow flowers, the flies possess an innate proboscis reflex elicited by chemical as well as yellow colour stimuli. In this study we show that the flies' proboscis reflex is only triggered by yellow colour stimuli and not altered by conditioning to other colours. Neither in absolute nor in differential conditioning experiments the flies learned to associate other colours than yellow with reward...
2018: PloS One
José J van den Driessche, Jogchum Plat, Ronald P Mensink
Functional foods can be effective in the prevention of metabolic syndrome and subsequently the onset of cardiovascular diseases and type II diabetes mellitus. More recently, however, another term was introduced to describe foods with additional health benefits: "superfoods", for which, to date, no generally accepted definition exists. Nonetheless, their consumption might contribute to the prevention of metabolic syndrome, for example due to the presence of potentially bioactive compounds. This review provides an overview of controlled human intervention studies with foods described as "superfoods" and their effects on metabolic syndrome parameters...
March 20, 2018: Food & Function
Corinne Cayrol, Anais Duval, Pauline Schmitt, Stephane Roga, Mylène Camus, Alexandre Stella, Odile Burlet-Schiltz, Anne Gonzalez-de-Peredo, Jean-Philippe Girard
Allergic inflammation has crucial roles in allergic diseases such as asthma. It is therefore important to understand why and how the immune system responds to allergens. Here we found that full-length interleukin 33 (IL-33FL ), an alarmin cytokine with critical roles in type 2 immunity and asthma, functioned as a protease sensor that detected proteolytic activities associated with various environmental allergens across four kingdoms, including fungi, house dust mites, bacteria and pollens. When exposed to allergen proteases, IL-33FL was rapidly cleaved in its central 'sensor' domain, which led to activation of the production of type 2 cytokines in group 2 innate lymphoid cells...
March 19, 2018: Nature Immunology
Taisuke Kato, Naoya Tajima, Katsumasa Kitamura, Yoshihiro Takasato, Iwao Tajima, Manabu Ono, Kazunori Tagami, Kazunori Sakai, Tomoko Furuta, Shiro Sugiura, Komei Ito
BACKGROUND AND PURPOSE: The principal aim of this study was to clarify the clinical profile of pediatric patients with fruit allergies. SUBJECTS AND METHODS: We assigned 265 pediatric patients with fruit allergies who were receiving outpatient treatment at Aichi Children's Health and Medical Center and 32 who underwent kiwi or banana oral food chal- lenge (OFC) test to an oral symptom group or a systemic symptom group and retrospectively examined their clinical profiles and prognosis from their medical records...
2018: Arerugī, [Allergy]
Mari Saito, Yutaka Kikuchi, Alan Kawarai Lefor, Wakamichi Shimamura
BACKGROUND: Allergen sensitization differs according to countries and regions. Understanding the characteristics of allergen sensitization in one's own country is useful for the treatment of patients with allergic diseases. Recently, Japanese cedar pollen (JCP) sensitization is increasing in young Japanese children. Therefore, we evaluated allergen sensitization patterns in under 60-month-old Japanese recurrent wheezers using multiple allergen tests. METHODS: Allergen tests for 204 Japanese recurrent wheezers between April 2010 and April 2016 were reviewed...
2018: Arerugī, [Allergy]
A Travaglini, S Masieri, C Cavaliere, M A Brighetti
Allergies caused by inhalant allergens, particularly pollens, are steadily increasing in urban centers. It is known that atmospheric pollution is strongly related to the inflammatory disease of the upper and lower airways but it is equally important in the development of sensitization towards pollens. Particulate Matter (PM), sulfur dioxide (SO2) and nitrogen dioxide (NO2) have an enhancement function on the persistence of pollens in the air, increasing the concentration and duration of pollinosis. It is therefore essential to use air quality control methods in urban centers to monitor the presence of pollen and fine dust that can drive the doctor and the patient to improve prevention, a step of primary importance in the treatment of allergies...
January 2018: Journal of Biological Regulators and Homeostatic Agents
Hussaina Banu, N Renuka, S M Faheem, Raees Ismail, Vinita Singh, Zahra Saadatmand, Saad Sultan Khan, Kavya Narayanan, Alma Raheem, Kumpati Premkumar, Geetha Vasanthakumar
Recently, several attempts have been made to use the phytopharmaceuticals from plant extracts as reducing, capping and stabilizing agents for the biomimetic synthesis of various metal nanoparticles conjugated to the phytopharmaceuticals. These biogenic metal nanoparticles are non-toxic and can be used as contrast agents, drug delivery vehicles and photothermal agents for cancer therapy. Herein, we report the synthesis of both silver and gold nanoparticles using the pollen extract of Phoenix dactylifera (Date Palm), characterization using UV-visible spectroscopy, scanning electron microscopy and energy dispersive X-ray spectroscopy, quantitation of phytochemicals capping the nanoparticles using Folin - Ciocalteu's method, cytotoxicity studies on MCF-7 breast cancer cells, cancer cell death analysis using fluorescent microscopy, and modulation of expression of the pro-apoptotic p53 and anti-apoptotic Bcl-2 proteins...
March 18, 2018: Biological Trace Element Research
Mika J Mäkelä, Pär Gyllfors, Erkka Valovirta, Maria A Steffensen, Pernille M Grønager, Johannes Savolainen, Lone Winther
PURPOSE: The SQ tree sublingual immunotherapy (SLIT)-tablet containing allergen extracts with the major allergen Bet v 1 from birch pollen is currently being developed for the treatment of tree pollen-induced allergic rhinitis/conjunctivitis with or without asthma. The aim of this Phase II trial was to investigate the dose-related efficacy and safety of the SQ tree SLIT-tablet. METHODS: This study was a randomized, parallel-group, double-blind, placebo-controlled, multi-national trial conducted in Europe...
March 15, 2018: Clinical Therapeutics
Punchama Pacharn, Wisuwat Songnual, Umaporn Siriwatanakul, Torpong Thongngarm, Onrapak Reamtong, Orathai Jirapongsananuruk, Chawewan Bunnag, Surapon Piboonpocanun
BACKGROUND: Subtropical grass pollens of Bermuda (BGP), Johnson (JGP), and Para or buffalo grass (PGP), are common causes of pollen allergies in warm climate area. Allergic rhinitis (AR) patients had positive skin prick test (SPT) to extract of these 3 grass pollens. However, no allergenic proteins of 3 grass pollens have never been studied. OBJECTIVE: To identify major allergens of BGP, JGP, and PGP in Thai grass pollen-allergic patients and to examine their sIgE cross-reactivity...
March 12, 2018: Asian Pacific Journal of Allergy and Immunology
Anne-Lise Mariet, Anne-Véronique Walter-Simonnet, Frédéric Gimbert, Christophe Cloquet, Carole Bégeot
Iron mining activities in the Bruche valley (Vosges Mountains, France) date historically from the Roman period to the mid-nineteenth century. The geochemical and palynological study of a core from the peat bog of Le Champ du Feu allows highlighting impacts of these activities over the past millennium. Trace metal contamination is recorded for lead (Pb), arsenic, zinc, and antimony during the Middle Ages, the sixteenth century, and from cal. AD 1750-1900, with several sources distinguished by Pb isotope analyses...
March 17, 2018: Ambio
Julia Karmann, Benedikt Müller, Ulrich Z Hammes
Pathways for assimilates. During their life cycle, plants alternate between a haploid stage, the gametophyte, and a diploid stage, the sporophyte. In higher plants, meiosis generates the gametophyte deeply embedded in the maternal tissue of the flower. The megaspore mother cell undergoes meiosis, and then, the surviving megaspore of the four megaspores produced undergoes mitotic divisions and finally gives rise to the female gametophyte, consisting of the egg cell, two synergids, the central cell, which due to the fusion of two nuclei is diploid (double haploid) in Arabidopsis and most angiosperms and the antipods, whose number is not fixed and varies significantly between species (Yadegari and Drews in Plant Cell 16(Suppl):S133-S141, 2004)...
March 16, 2018: Plant Reproduction
Elzbieta Weryszko-Chmielewska, Idalia Kasprzyk, Malgorzata Nowak, Aneta Sulborska, Joanna Kaczmarek, Agata Szymanska, Weronika Haratym, Miroslaw Gilski, Malgorzata Jedryczka
The spores of Cladosporium Link. are often present in the air in high quantities and produce many allergenic proteins, which may lead to asthma. An aerobiological spore monitoring program can inform patients about the current spore concentration in air and help their physicians determine the spore dose that is harmful for a given individual. This makes it possible to develop optimized responses and propose personalized therapy for a particular sensitive patient. The aim of this study was to assess the extent of the human health hazard posed by the fungal genus Cladosporium...
March 2018: Journal of Environmental Sciences (China)
James R Smith, Jaboury Ghazoul, David F R P Burslem, Akira Itoh, Eyen Khoo, Soon Leong Lee, Colin R Maycock, Satoshi Nanami, Kevin Kit Siong Ng, Chris J Kettle
Documenting the scale and intensity of fine-scale spatial genetic structure (FSGS), and the processes that shape it, is relevant to the sustainable management of genetic resources in timber tree species, particularly where logging or fragmentation might disrupt gene flow. In this study we assessed patterns of FSGS in three species of Dipterocarpaceae (Parashorea tomentella, Shorea leprosula and Shorea parvifolia) across four different tropical rain forests in Malaysia using nuclear microsatellite markers. Topographic heterogeneity varied across the sites...
2018: PloS One
Ke Xie, Suowei Wu, Ziwen Li, Yan Zhou, Danfeng Zhang, Zhenying Dong, Xueli An, Taotao Zhu, Simiao Zhang, Shuangshuang Liu, Jinping Li, Xiangyuan Wan
Map-based cloning of maize ms33 gene showed that ZmMs33 encodes a sn-2 glycerol-3-phosphate acyltransferase, the ortholog of rice OsGPAT3, and it is essential for male fertility in maize. Genetic male sterility has been widely studied for its biological significance and commercial value in hybrid seed production. Although many male-sterile mutants have been identified in maize (Zea mays L.), it is likely that most genes that cause male sterility are unknown. Here, we report a recessive genetic male-sterile mutant, male sterility33 (ms33), which displays small, pale yellow anthers, and complete male sterility...
March 15, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Yun-Yan Zhang, En Shi, Zhao-Ping Yang, Qi-Fang Geng, Ying-Xiong Qiu, Zhong-Sheng Wang
Parrotia subaequalis is an endangered palaeoendemic tree from disjunct montane sites in eastern China. Due to the lack of effective genomic resources, the genetic diversity and population structure of this endangered species are not clearly understood. In this study, we conducted paired-end shotgun sequencing (2 × 125 bp) of genomic DNA for two individuals of P. subaequalis on the Illumina HiSeq platform. Based on the resulting sequences, we have successfully assembled the complete chloroplast genome of P...
2018: Frontiers in Plant Science
Rosy Wells, A T Fox, Mark Furman
Case reports have described an association between oral food/aeroallergen immunotherapy with the development of eosinophilic oesophagitis (EoE). The underlying mechanism of this is poorly understood, as is the role that both food/aeroallergen sensitisation plays in the pathogenesis of EoE. Specific immunotherapy has a long-standing history of use in the management of moderate/severe seasonal allergic rhinitis (AR), caused by tree/grass pollens. Subcutaneous immunotherapy (SCIT) to grass pollen is less commonly used in children than sublingual immunotherapy (SLIT) or oral immunotherapy for practical reasons...
March 15, 2018: BMJ Case Reports
Hiroshi Nakatani, Paul Gomes, Ron Bradford, Qiang Guo, Eleonora Safyan, David A Hollander
PURPOSE: To compare alcaftadine and olopatadine ophthalmic solutions, and vehicle for preventing allergen-mediated conjunctivitis in Japanese subjects. METHODS: Japanese cedar pollen-sensitive subjects were randomized to alcaftadine 0.25%, olopatadine 0.1%, or vehicle. Ocular itching was assessed at 3, 5 (primary outcome), 7, and 15 min post-conjunctival allergen challenge (CAC) and conjunctival hyperemia assessed at 7, 15 (secondary outcome), and 20 min post-CAC...
March 15, 2018: Ocular Immunology and Inflammation
Barbara Manachini, Giuseppe Bazan, Rosario Schicchi
The general increase of the cultivation and trade of Bt transgenic plants resistant to Lepidoptera pests raises concerns regarding the conservation of animal and plant biodiversity. Demand for biofuels has increased the cultivation and importation of oilseed rape (Brassica napus L.), including transgenic lines. In environmental risk assessments (ERAs) for its potential future cultivation as well as for food and feed uses, the impact on wild Brassicaeae relatives and on non-target Lepidoptera should be assessed...
March 14, 2018: Insect Science
Siraj Bahadur, Mushtaq Ahmad, Sehrosh Mir, Muhammad Zafar, Shazia Sultana, Shomaila Ashfaq, Muhammad Arfan
Pollen used to track structural and functional evolution in plants as well as to investigate the problems relative to plant classification. Pollen characters including ornamentation, shape, apertural pattern, pollen symmetry, colpus length, width, and margins used to detect the similarities and dissimilarities between genera and also species of the same genus. In this study pollen features of 20 monocot species belonging to 15 genera of the Amaryllidaceae, Asparagaceae, Iridaceae, Ixioliriaceae, Liliaceae, and Xanthorrhoeaceae were studied using scanning electron microscopy (SEM) and light microscopy (LM)...
March 14, 2018: Microscopy Research and Technique
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