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Cytochrome c oxidase

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https://www.readbyqxmd.com/read/28634792/impairments-of-cadmium-on-vitellogenin-accumulation-in-the-hepatopancreas-of-freshwater-crab-sinopotamon-henanense
#1
Jian Yang, Hui Sun, Yu Qian, Jie Yang
During ovary maturation of crabs, vitellogenin (Vg), a precursor molecule of vitellin (Vn) needed for embryogenesis, can be produced in large quantities in the hepatopancreas and then transported to the ovary by the hemolymph. In the present study, effects of Cd on Vg accumulation in the hepatopancreas and Vg transportation of the freshwater crab Sinopotamon henanense were investigated. We also studied the impacts of Cd on the mRNA expression of genes involved in energy metabolism, protein metabolism, and metallothionein (MT) and glutathione (GSH) synthesis...
June 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28634620/new-data-on-neodiplostomum-americanum-chandler-and-rausch-1947-digenea-diplostomidae-in-the-great-horned-owl-bubo-virginianus-gmelin-1788-and-the-eastern-screech-owl-megascops-asio-linnaeus-1758-in-mississippi-usa
#2
Ethan T Woodyard, Thomas G Rosser, Matt J Griffin
Neodiplostomum americanum Chandler and Rausch, 1947 has been reported from six species of owls in North America. At present, there are no molecular data for this species and gene sequence data from Neodiplostomum Railliet, 1919 are limited. A freshly deceased specimen of the Great Horned Owl Bubo virginianus Gmelin, 1788 and a freshly deceased specimen of the Eastern Screech Owl Megascops asio Linnaeus, 1758 were collected in Oktibbeha County, Mississippi in 2014 and 2016, respectively. Neodiplostomum americanum were recovered from both hosts...
June 20, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28634030/effects-of-membrane-curvature-and-ph-on-proton-pumping-activity-of-single-cytochrome-bo3-enzymes
#3
Mengqiu Li, Sanobar Khan, Honglin Rong, Roman Tuma, Nikos S Hatzakis, Lars J C Jeuken
The molecular mechanism of proton pumping by heme-copper oxidases (HCO) has intrigued the scientific community since it was first proposed. We have recently reported a novel technology that enables the continuous characterisation of proton transport activity of a HCO and ubiquinol oxidase from Escherichia coli, cytochrome bo3, for hundreds of seconds on the single enzyme level (Li et al. J Am Chem Soc 137 (2015) 16055-16063). Here, we have extended these studies by additional experiments and analyses of the proton transfer rate as a function of proteoliposome size and pH at the N- and P-side of single HCOs...
June 17, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28630004/co-releasing-molecules-2-attenuates-ox-ldl-induced-injury-in-huvecs-by-ameliorating-mitochondrial-function-and-inhibiting-wnt-%C3%AE-catenin-pathway
#4
Hai-Jian Sun, Dong-Yan Xu, Yi-Xin Sun, Tong Xue, Chen-Xing Zhang, Zhi-Xuan Zhang, Wei Lin, Ke-Xue Li
Oxidized low-density lipoprotein (ox-LDL) is well known to disrupt normal functionality of endothelium, which plays a prominent role in endothelial dysfunction in many cardiovascular diseases. CO-releasing molecule 2 (CORM-2) is a promising candidate for treatment of cardiovascular diseases. However, it has not been defined whether CORM-2 might improve endothelial injury induced by ox-LDL. The present study was undertaken to determine the regulatory role of CORM-2 in cell injury of ox-LDL-treated human umbilical vein endothelial cells (HUVECs)...
June 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28629829/morphological-variability-and-molecular-characterization-of-pomphorhynchus-zhoushanensis-sp-nov-acanthocephala-pomphorhynchidae-with-comments-on-the-systematic-status-of-pomphorhynchus-monticelli-1905
#5
Liang Li, Hui-Xia Chen, Omar M Amin, Yue Yang
Species of Pomphorhynchus Monticelli, 1905 commonly parasitize the digestive tract of freshwater fishes, and rarely occur in marine fishes and amphibians. In the present study, Pomphorhynchus zhoushanensis sp. nov., collected from the barred knifejaw Oplegnathus fasciatus (Temminck & Schlegel) (Perciformes: Oplegnathidae) in the East China Sea, was described using integrated approaches, including light and scanning electron microscopy, and the sequencing and analysing of ribosomal [small ribosomal DNA (18S) and internal transcribed spacer (ITS)] and mitochondrial [cytochrome c oxidase subunit 1 (cox1)] target regions...
June 16, 2017: Parasitology International
https://www.readbyqxmd.com/read/28626635/eosinophilic-meningoencephalitis-associated-with-rat-lungworm-angiostrongylus-cantonensis-migration-in-two-nine-banded-armadillos-dasypus-novemcinctus-and-an-opossum-didelphis-virginiana-in-the-southeastern-united-states
#6
Martha F Dalton, Heather Fenton, Christopher A Cleveland, Elizabeth J Elsmo, Michael J Yabsley
Angiostrongylus cantonensis, the rat lungworm, was the cause of neural larval migrans in two nine-banded armadillos (Dasypus novemcinctus) and one Virginia opossum (Didelphis virginiana) from the southeastern United States. Histologic findings in all three cases included eosinophilic meningoencephalitis with variable numbers of nematode larvae in the meninges or the neuroparenchyma. In two of the three cases, nematodes were extracted from brain tissue via a "squash prep" method. Identification of the nematodes was confirmed by amplification and sequence analysis of the partial cytochrome c oxidase subunit I gene from all three cases...
August 2017: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/28623502/molecular-and-morphological-evidence-for-nine-species-in-north-american-australapatemon-sudarikov-1959-a-phylogeny-expansion-with-description-of-the-zygocercous-australapatemon-mclaughlini-n-sp
#7
Michelle A Gordy, Sean A Locke, Timothy A Rawlings, Angela R Lapierre, Patrick C Hanington
Zygocercous (aggregating) cercarial larvae were recently discovered emerging from a physid snail during a molecular survey of cercariae from molluscs in lakes in central Alberta, Canada. This manuscript delves into the characterization of these cercariae through morphological and molecular techniques and provides the first genetic information for a zygocercous larval trematode. Analyses of cytochrome c oxidase I of mitochondrial DNA and two partial regions of nuclear ribosomal DNA sequences revealed the zygocercous cercariae to belong to the genus Australapatemon Sudarikov, 1959...
June 16, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28620043/mitochondrial-cytochrome-c-oxidase-catalysis-coupling-and-controversies
#8
REVIEW
Peter R Rich
Mitochondrial cytochrome c oxidase is a member of a diverse superfamily of haem-copper oxidases. Its mechanism of oxygen reduction is reviewed in terms of the cycle of catalytic intermediates and their likely chemical structures. This reaction cycle is coupled to the translocation of protons across the inner mitochondrial membrane in which it is located. The likely mechanism by which this occurs, derived in significant part from studies of bacterial homologues, is presented. These mechanisms of catalysis and coupling, together with current alternative proposals of underlying mechanisms, are critically reviewed...
June 15, 2017: Biochemical Society Transactions
https://www.readbyqxmd.com/read/28617536/effects-of-mulberry-leaf-polysaccharide-on-oxidative-stress-in-pancreatic-%C3%AE-cells-of-type-2-diabetic-rats
#9
C-G Liu, Y-P Ma, X-J Zhang
OBJECTIVE: To explore and discuss the effects and mechanisms of mulberry leaf polysaccharide (MLP) on oxidative stress in pancreatic β-cells of type 2 diabetic rats. MATERIALS AND METHODS: The model of diabetic rats was established by inducing the Sprague-Dawley (SD) rats with high-sugar and high-fat diet for 6 weeks and then giving them streptozotocin (STZ) by single intraperitoneal injection. The mulberry leaf polysaccharide was administered via gavage daily for 8 weeks, and the tissue morphology was observed through electron microscopy...
May 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28616059/supramolecular-structure-of-dietary-fat-in-early-life-modulates-expression-of-markers-for-mitochondrial-content-and-capacity-in-adipose-tissue-of-adult-mice
#10
Andrea Kodde, Eline M van der Beek, Esther Phielix, Eefje Engels, Lidewij Schipper, Annemarie Oosting
BACKGROUND: Previous studies have shown that early life nutrition can modulate the development of white adipose tissue and thereby affect the risk on obesity and metabolic disease later in life. For instance, postnatal feeding with a concept infant milk formula with large, phospholipid coated lipid droplets (Concept, Nuturis®), resulted in reduced adiposity in adult mice. The present study investigated whether differences in cell energy metabolism, using markers of mitochondrial content and capacity, may contribute to the observed effects...
2017: Nutrition & Metabolism
https://www.readbyqxmd.com/read/28613823/inhibition-of-mitochondrial-bioenergetics-by-esterase-triggered-cos-h2s-donors
#11
Andrea K Steiger, Michela Marcatti, Csaba Szabo, Bartosz Szczesny, Michael D Pluth
Hydrogen sulfide (H2S) is an important biological mediator, and synthetic H2S donating molecules provide an important class of investigative tools for H2S research. Here we report esterase-activated H2S donors that function by first releasing carbonyl sulfide (COS), which is rapidly converted to H2S by the ubiquitous enzyme carbonic anhydrase (CA). We report the synthesis, self-immolative decomposition, and H2S release profiles of the developed scaffolds. In addition, the developed esterase-triggered COS/H2S donors exhibit higher levels of cytotoxicity than equivalent levels of Na2S or the common H2S donors GYY4137 and AP39...
June 14, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28610937/hookworm-infections-among-migrant-workers-in-malaysia-molecular-identification-of-necator-americanus-and-ancylostoma-duodenale
#12
Norhidayu Sahimin, Yvonne Ai Lian Lim, Benacer Douadi, Mohd Khairul Nizam Mohd Khalid, John-James Wilson, Jerzy M Behnke, Siti Nursheena Mohd Zain
Ongoing urbanisation of the working population as well as cross-border migration of workers particularly into large cities has contributed to the development and growth of urban slums. These deprived areas are conducive for the transmission of intestinal pathogens including hookworm. The aim of this study was to determine both the prevalence and species identity of hookworm infections among the migrant worker community in Malaysia. A total of 388 faecal samples were collected from migrant workers between September 2014 and August 2015, representing workers from five employment sectors: construction, manufacturing, agriculture and plantations, food services and domestic services...
June 10, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28610555/indication-for-selfing-in-geographically-separated-populations-and-evidence-for-pleistocene-survival-within-the-alps-the-case-of-cylindrus-obtusus-pulmonata-helicidae
#13
Luise Kruckenhauser, Elisabeth Haring, Barbara Tautscher, Luis Cadahía, Laura Zopp, Michael Duda, Josef Harl, Helmut Sattmann
BACKGROUND: Cylindrus obtusus is one of the most prominent endemic snail species of the Eastern Alps. It is restricted to alpine meadows and calcareous rocky habitats above 1500 m. Peculiar intraspecific differences have been observed in its genital tract in the eastern populations the two mucus glands associated with the love dart sac are highly variable, while almost no variation was observed in the western populations. This raises the question whether the mode and success of reproduction of the respective populations are different...
June 13, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28610345/danothrips-litseae-sp-n-thysanoptera-thripidae-from-india-on-leaves-of-litsea
#14
Kaomud Tyagi, Devkant Singha, Vikas Kumar
Danothrips litseae sp. n. is described from Litsea sp. in North East India. This is the third species of the genus with distinct tergal craspeda, also weak, indistinct, irregular scallop-like projections on the sternites. Molecular data of mitochondrial cytochrome c oxidase (mtCOI) from specimens of this species are also generated as additional data for future studies.
May 19, 2017: Zootaxa
https://www.readbyqxmd.com/read/28610301/redescription-of-the-numbat-tick-ixodes-sternalixodes-myrmecobii-roberts-1962-acari-ixodidae-with-descriptions-of-the-male-and-nymph-and-new-host-records
#15
Mackenzie L Kwak, Amanda Ash, Aileen Elliot
Limited knowledge regarding the biology and identification of the Australian tick Ixodes myrmecobii exists with only the female described to date. Here we provide a description of the male and nymph as well as a redescription of the female. All described stages are molecularly characterised using the cytochrome c oxidase subunit 1 (CO1) and internal transcribed spacer 2 (ITS2) loci. An updated list of hosts is presented including the first records from humans, cattle and several native species. Information on the distribution and conservation status of this species is also included...
May 26, 2017: Zootaxa
https://www.readbyqxmd.com/read/28610164/a-new-and-five-rare-bdelloids-from-korea
#16
Min Ok Song, Chang-Ho Lee
A taxonomic study on bdelloid rotifers collected from various terrestrial habitats at six different locations in Korea yielded 12 new Korean records and a new species, Philodina koreana n. sp. Among the 12 new Korean records, eight species and two subspecies are new to Asia. These new Asian records include five rare species with poorly known distributions. Philodina childi Milne and P. scabra Milne were rediscovered in Korea almost 100 years after the original descriptions from South Africa. Our study is the first to report Habrotrocha longicalcarata Bērzinš outside its type locality...
March 13, 2017: Zootaxa
https://www.readbyqxmd.com/read/28610073/new-or-little-known-species-of-i-chaetocladius-i-s-str-kieffer-1911-diptera-chironomidae-orthocladiinae-from-the-amur-river-basin-russian-far-east
#17
Eugenyi A Makarchenko, Marina A Makarchenko, Alexander A Semenchenko
Chironomids of the subgenus Chaetocladius s. str. from the Amur River basin are revised using both morphological characters and molecular data. Three new species, C. egorych sp. nov., C. lopatinskiy sp. nov. and C. yavorskayae sp. nov., are described and figured. The pupa of C. fedotkin is described for the first time. Adult males of C. ligni and C. piger, little-known in the Far East, are redescribed and annotated, and key to males of the Chaetocladius s. str. from the Amur River basin is provided. A reference 658 bp barcode sequence from a fragment of the mitochondrial gene cytochrome oxidase I (COI) was used as a tool for species delimitation...
March 27, 2017: Zootaxa
https://www.readbyqxmd.com/read/28610069/the-genus-i-leucophenga-i-diptera-drosophilidae-part-vii-the-i-subpollinosa-i-species-group-from-china-with-morphological-and-molecular-evidence
#18
Jia Huang, Yirui Su, Hongwei Chen
Seventeen species of Leucophenga subpollinosa species group are described from China (including 11 new species): L. argentina (de Meijere, 1924); L. flavicosta Duda, 1926; L. formosa Okada, 1987; L. nigroscutellata Duda, 1924; L. subpollinosa (de Meijere, 1914); L. umbratula Duda, 1924; L. aculeata sp. nov.; L. acuticauda sp. nov.; L. cultella sp. nov.; L. cyclophylla sp. nov.; L. flaviclypeata sp. nov.; L. fuscipedes sp. nov.; L. gracilenta sp. nov.; L. latipenis sp. nov.; L. magnicauda sp. nov.; L. rhombura sp...
March 27, 2017: Zootaxa
https://www.readbyqxmd.com/read/28610033/molecular-approaches-for-blood-meal-analysis-and-species-identification-of%C3%A2-mosquitoes-insecta-diptera-culicidae-in-rural-locations-in-southern-england-united-kingdom
#19
Luis Miguel Hernández-Triana, Victor Albert Brugman, Sean Williams John Prosser, Chris Weland, Nadya Nikolova, Leigh Thorne, Mar Fernández DE Marco, Anthony Richard Fooks, Nicholas Johnson
Thirty-four species of Culicidae are present in the UK, of which 15 have been implicated as potential vectors of arthropod-borne viruses such as West Nile virus. Identification of mosquito feeding preferences is paramount to the understanding of vector-host-pathogen interactions which, in turn, would assist in the control of disease outbreaks. Results are presented on the application of DNA barcoding for vertebrate species identification in blood-fed female mosquitoes in rural locations. Blood-fed females (n = 134) were collected in southern England from rural sites and identified based on morphological criteria...
April 3, 2017: Zootaxa
https://www.readbyqxmd.com/read/28610024/speciation-in-fractured-rock-landforms-towards-understanding-the-diversity-of-subterranean-cockroaches-dictyoptera-nocticolidae-i-nocticola-i-in-western-australia
#20
Andrew J Trotter, Jane M McRAE, Dean C Main, Terrie L Finston
Three new species of subterranean cockroach of the genus Nocticola from the Pilbara region of Western Australia are described on morphological characters of males. Nocticola quartermainei n. sp., Nocticola cockingi n. sp. and Nocticola currani n. sp. occur in fractured rock landforms and have varying degrees of troglomorphies. Sequence divergence of mitochondrial cytochrome c oxidase subunit I (COXI) clearly demonstrated populations are reproductively isolated over very short distances for the highly troglomorphic Nocticola cockingi n...
April 4, 2017: Zootaxa
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