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https://www.readbyqxmd.com/read/29145636/localization-and-functional-characterization-of-the-p-asn965ser-n965s-abca4-variant-in-mice-reveal-pathogenic-mechanisms-underlying-stargardt-macular-degeneration
#1
Laurie L Molday, Daniel Wahl, Marinko Sarunic, Robert S Molday
ABCA4 is a member of the superfamily of ATP-binding cassette (ABC) proteins that transports N-retinylidene-phosphatidylethanolamine (N-Ret-PE) across outer segment disc membranes thereby facilitating the removal of potentially toxic retinoid compounds from photoreceptor cells. Mutations in the gene encoding ABCA4 are responsible for Stargardt disease (STGD1), an autosomal recessive retinal degenerative disease that causes severe vision loss. To define the molecular basis for STGD1 associated with the p.Asn965Ser (N965S) mutation in the Walker A motif of nucleotide binding domain 1 (NBD1), we generated a p...
November 14, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29145471/arbuscular-mycorrhizal-strategy-for-zinc-mycoremediation-and-diminished-translocation-to-shoots-and-grains-in-wheat
#2
Abdelghafar M Abu-Elsaoud, Nivien A Nafady, Ahmed M Abdel-Azeem
Mycoremediation is an on-site remediation strategy, which employs fungi to degrade or sequester contaminants from the environment. The present work focused on the bioremediation of soils contaminated with zinc by the use of a native mycorrhizal fungi (AM) called Funneliformis geosporum (Nicol. & Gerd.) Walker & Schüßler. Experiments were performed using Triticum aestivum L. cv. Gemmeza-10 at different concentrations of Zn (50, 100, 200 mg kg-1) and inoculated with or without F. geosporum. The results showed that the dry weight of mycorrhizal wheat increased at Zn stressed plants as compared to the non-Zn-stressed control plants...
2017: PloS One
https://www.readbyqxmd.com/read/29145341/primary-malignant-melanoma-of-the-gallbladder-with-multiple-metastases-a-case-report
#3
Jun-Ke Wang, Fei Su, Wen-Jie Ma, Hai-Jie Hu, Qin Yang, Fei Liu, Quan-Sheng Li, Fu-Yu Li
RATIONAL: Primary malignant melanoma of the gallbladder is an extremely rare tumor, with fewer than 40 cases reported in the literature worldwide. The majority of patients presented as a solitary lesion in the gallbladder. To our knowledge, only one case of primary malignant melanoma of the gallbladder with multiple metastases has been reported, which involved the stomach, duodenum, pancreas, jejunum and a mesenteric lymph node. PATIENT CONCERNS: We report a case of primary malignant melanoma of the gallbladder with metastases to the duodenal bulb, right adrenal and a celiac lymph node...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29144144/structural-emergence-in-particle-dispersions
#4
Andrew Mulderig, Gregory Beaucage, Karsten Vogtt, Hanqiu Jiang, Yan Jin, Lisa Clapp, Donald Henderson
Particle dispersions, such as pigment-based inks, comprise weakly bound, milled nanoparticles. The properties of these pigments depend on both their chemical composition, as well as a rather complex structural hierarchy, which emerges from these dispersions. The emergence of structure under semi-dilute conditions is related to the structure of the dilute particles, the particle spacing (mesh size), processing history, and the interaction potential. Kinetic simulations could predict such emergence using these input parameters...
November 16, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29143837/development-of-a-label-free-raman-imaging-technique-for-differentiation-of-malaria-parasite-infected-from-non-infected-tissue
#5
Laura Frame, James Brewer, Rebecca Lee, Karen Faulds, Duncan Graham
During malarial infection, the host uses the spleen to clear the malaria parasites, however, the parasites have evolved the ability to bind to endothelial receptors in blood vessels of tissues to avoid removal, known as sequestration, and this is largely responsible for the symptoms and severity of infection. So a technique which could non-invasively diagnose tissue burden could be utilised as an aid for localised malaria diagnosis within tissue. Raman spectroscopy is a label-free imaging technique and can provide unique and chemically specific Raman 'fingerprint' spectrum of biological samples such as tissue...
November 16, 2017: Analyst
https://www.readbyqxmd.com/read/29143621/identification-and-characterization-of-regulatory-network-components-for-anthocyanin-synthesis-in-barley-aleurone
#6
Ksenia V Strygina, Andreas Börner, Elena K Khlestkina
BACKGROUND: Among natural populations, there are different colours of barley (Hordeum vulgare L.). The colour of barley grains is directly related to the accumulation of different pigments in the aleurone layer, pericarp and lemma. Blue grain colour is due to the accumulation of anthocyanins in the aleurone layer, which is dependent on the presence of five Blx genes that are not sequenced yet (Blx1, Blx3 and Blx4 genes clustering on chromosome 4HL and Blx2 and Blx5 on 7HL). Due to the health benefits of anthocyanins, blue-grained barley can be considered as a source of dietary food...
November 14, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/29143606/metabolic-pathways-and-genes-identified-by-rna-seq-analysis-of-barley-near-isogenic-lines-differing-by-allelic-state-of-the-black-lemma-and-pericarp-blp-gene
#7
Anastasiya Y Glagoleva, Nikolay A Shmakov, Olesya Y Shoeva, Gennady V Vasiliev, Natalia V Shatskaya, Andreas Börner, Dmitry A Afonnikov, Elena K Khlestkina
BACKGROUND: Some plant species have 'melanin-like' black seed pigmentation. However, the chemical and genetic nature of this 'melanin-like' black pigment have not yet been fully explored due to its complex structure and ability to withstand almost all solvents. Nevertheless, identification of genetic networks participating in trait formation is key to understanding metabolic processes involved in the expression of 'melanin-like' black seed pigmentation. The aim of the current study was to identify differentially expressed genes (DEGs) in barley near-isogenic lines (NILs) differing by allelic state of the Blp (black lemma and pericarp) locus...
November 14, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/29143302/convergent-selection-pressures-drive-the-evolution-of-rhodopsin-kinetics-at-high-altitudes-via-non-parallel-mechanisms
#8
Gianni M Castiglione, Ryan K Schott, Frances E Hauser, Belinda S W Chang
Convergent evolution in response to similar selective pressures is a well-known phenomenon in evolutionary biology. Less well understood is how selection drives convergence in protein function, and the underlying mechanisms by which this can be achieved. Here we investigate functional convergence in the visual system of two distantly related lineages of high-altitude adapted Andean and Himalayan catfishes. Statistical analyses revealed in the two high-altitude lineages, a parallel acceleration of evolutionary rates in rhodopsin, the dim-light visual pigment...
November 16, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/29143298/a-single-nucleotide-mutation-of-ispf-gene-involved-in-the-mep-pathway-for-isoprenoid-biosynthesis-causes-yellow-green-leaf-phenotype-in-rice
#9
Rui Huang, Yang Wang, Pingrong Wang, Chunmei Li, Fuliang Xiao, Nenggang Chen, Na Li, Caixia Li, Changhui Sun, Lihua Li, Rongjun Chen, Zhengjun Xu, Jianqing Zhu, Xiaojian Deng
We identified IspF gene through yellow-green leaf mutant 505ys in rice. OsIspF was expressed in all tissues detected, and its encoded protein was targeted to the chloroplast. On expression levels of genes in this mutant, OsIspF itself and the genes encoding other enzymes of the MEP pathway and chlorophyll synthase were all up-regulated, however, among eight genes associated with photosynthesis, only psaA, psaN and psbA genes for three reaction center subunits of photosystem obviously changed. Isoprenoids are the most abundant natural compounds in all organisms, which originate from the basic five-carbon units isopentenyl diphosphate (IPP) and dimethylallyl diphosphate (DMAPP)...
November 15, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/29142827/overexpression-of-the-primary-sigma-factor-gene-siga-improved-carotenoid-production-by-corynebacterium-glutamicum-application-to-production-of-%C3%AE-carotene-and-the-non-native-linear-c50-carotenoid-bisanhydrobacterioruberin
#10
Hironori Taniguchi, Nadja A Henke, Sabine A E Heider, Volker F Wendisch
Corynebacterium glutamicum shows yellow pigmentation due to biosynthesis of the C50 carotenoid decaprenoxanthin and its glycosides. This bacterium has been engineered for production of various non-native cyclic C40 and C50 carotenoids such as β-carotene, astaxanthin or sarcinaxanthin. In this study, the effect of modulating gene expression more broadly by overexpression of sigma factor genes on carotenoid production by C. glutamicum was characterized. Overexpression of the primary sigma factor gene sigA improved lycopene production by recombinant C...
June 2017: Metabolic Engineering Communications
https://www.readbyqxmd.com/read/29142303/fus-toxicity-is-rescued-by-the-modulation-of-lncrna-hsr%C3%AF-expression-in-drosophila-melanogaster
#11
Luca Lo Piccolo, Salinee Jantrapirom, Yoshitaka Nagai, Masamitsu Yamaguchi
FUS is an aggregation-prone hnRNP involved in transcriptional and post-transcriptional regulation that aberrantly forms immunoreactive inclusion bodies in a range of neurological diseases classified as FUS-proteinopathies. Although FUS has been extensively examined, the underlying molecular mechanisms of these diseases have not yet been elucidated in detail. We previously reported that RNAi of the lncRNA hsrω altered the expression and sub-cellular localization of Drosophila FUS in the central nervous system of the fly...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29142075/cone-myoid-elongation-involves-unidirectional-microtubule-movement-mediated-by-dynein-1
#12
Tylor R Lewis, Mariusz Zareba, Brian A Link, Joseph C Besharse
Teleosts and amphibians exhibit retinomotor movements, morphological changes in photoreceptors regulated by light and circadian rhythms. Cone myoid elongation occurs during dark adaptation leading to the positioning of the cone outer segment closer to the retinal pigment epithelium. While it has been shown that microtubules are essential for cone myoid elongation, the underlying mechanism has not been established. In this work, we generated a transgenic line of zebrafish expressing a photoconvertible form of α-tubulin (tdEOS-tubulin) specifically in cone photoreceptors...
November 15, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/29141687/autologous-adipose-derived-regenerative-cell-therapy-modulates-development-of-hypertrophic-scarring-in-a-red-duroc-porcine-model
#13
Philippe Foubert, Diana Zafra, Mike Liu, Rohit Rajoria, Damian Gutierrez, Mayer Tenenhaus, John K Fraser
BACKGROUND: Effective prevention and treatment of hypertrophic scars (HTSs), a common consequence of deep-partial thickness injury, remain a significant clinical challenge. Previous studies from our group have shown that autologous adipose-derived regenerative cells (ADRCs) represent a promising approach to improve wound healing and, thereby, impact HTS development. The purpose of this study was to assess the influence of local delivery of ADRCs immediately following deep-partial thickness cutaneous injury on HTS development in the red Duroc (RD) porcine model...
November 15, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29141067/an-elusive-amelanotic-melanoma-and-review-of-dermoscopic-findings
#14
Anthony Chiaravalloti, Ali Banki
<p>Amelanotic melanoma (AM) is one of the great masqueraders in dermatology. It is a very difficult clinical diagnosis to make because these tumors are devoid of pigment and other clues of melanoma. They are commonly misdiagnosed clinically as other benign and malignant conditions. We present a new case of AM in an 84-year-old woman with a history of non-melanoma skin cancer. She had a thin pink plaque that was initially misdiagnosed as a basal cell carcinoma. We also discuss dermoscopy and its valuable role to improve diagnostic accuracy...
November 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29141061/a-randomized-investigator-blinded-comparison-of-two-topical-regimens-in-fitzpatrick-skin-types-iii-vi-with-moderate-to-severe-facial-hyperpigmentation
#15
Monique J Vanaman Wilson, Isabela T Jones, Joanna Bolton, Lisa Larsen, Douglas C Wu, Mitchel P Goldman
<p>Purpose: Though hydroquinone (HQ) remains the gold standard for treatment of hyperpigmentation, concerns about its safety have prompted the development of HQ-free topical skin lightening systems. OBJECTIVE: To compare the efficacy and tolerability of a new HQ-free system and a popular HQ-based system for the improvement of facial hyperpigmentation and photoaging in darker skin types. METHODS: This investigator-blinded trial randomized 30 subjects of Fitzpatrick skin types III to VI with moderate to severe hyperpigmentation to a new 7-product HQ-free system or a 7-product HQ-based system for 12 weeks...
November 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29141058/disparity-in-cutaneous-pigmentary-response-to-led-vs-halogen-incandescent-visible-light-results-from-a-single-center-investigational-clinical-trial-determining-a-minimal-pigmentary-visible-light-dose
#16
Teo Soleymani, David E Cohen, Lorcan M Folan, Uchenna R Okereke, Nada Elbuluk, Nicholas A Soter
<p>Background: While most of the attention regarding skin pigmentation has focused on the effects of ultraviolet radiation, the cutaneous effects of visible light (400 to 700nm) are rarely reported. OBJECTIVE: The purpose of this study was to investigate the cutaneous pigmentary response to pure visible light irradiation, examine the difference in response to different sources of visible light irradiation, and determine a minimal pigmentary dose of visible light irradiation in melanocompetent subjects with Fitzpatrick skin type III - VI...
November 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29140884/ovarian-sex-cord-stromal-tumors-with-melanin-pigment-report-of-a-previously-undescribed-phenomenon
#17
Jennifer Taylor, W Glenn McCluggage
We report 2 ovarian sex cord-stromal tumors, a luteinized adult granulosa cell tumor and a cellular fibroma, with melanin pigment. These occurred in 44 and 61-yr-old patients, respectively. As far as we are aware, melanin pigment has not been described previously in an ovarian sex cord-stromal tumor, although it has been reported in a testicular Sertoli cell tumor. We review ovarian neoplasms containing melanin pigment.
November 14, 2017: International Journal of Gynecological Pathology
https://www.readbyqxmd.com/read/29140861/sealing-of-corneal-lacerations-using-photoactivated-rose-bengal-dye-and-amniotic-membrane
#18
Timothy A Soeken, Hong Zhu, Sheri DeMartelaere, Brett W Davies, Mirang Kim, Heuy-Ching Wang, James Aden, Rose Grimm, Clemens Alt, Irene E Kochevar, Anthony J Johnson
PURPOSE: Watertight closure of perforating corneoscleral lacerations is necessary to prevent epithelial ingrowth, infection, and potential loss of the eye. Complex lacerations can be difficult to treat, and repair with sutures alone is often inadequate. In this study, we evaluated a potentially sutureless technology for sealing complex corneal and scleral lacerations that bonds the amniotic membrane (AM) to the wound using only green light and rose bengal dye. METHODS: The AM was impregnated with rose bengal and then sealed over lacerations using green light to bond the AM to the deepithelialized corneal surface...
November 14, 2017: Cornea
https://www.readbyqxmd.com/read/29140806/florid-granuloma-annulare-like-reaction-in-regional-lymph-nodes-after-regression-of-red-pigment-in-tattoos
#19
Michael D Carter, Jonathan Trites, Shelly A McNeil, Noreen N M Walsh, Martin J Bullock
A healthy 50-year-old woman had a tattoo performed on the posterior aspect of her neck and another on the dorsum of her left foot. Several weeks later, she noted redness, tenderness, and intense pruritis at both tattoo sites. Treatment with cephalexin and hydrocortisone cream was instituted, without success. Within a few months, the red, but not black, pigment had disappeared from both tattoos and was replaced by pale areas of scarring. Persistently enlarged left supraclavicular and suboccipital lymph nodes were excised 7 and 10 months after receipt of the tattoos, respectively...
October 30, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/29139350/nemorella-caseinilytica-gen-nov-sp-nov-isolated-from-forest-soil
#20
Dhiraj Kumar Chaudhary, Ram Hari Dahal, Jaisoo Kim
Two novel strains, J116-2(T) and J116-1, were isolated from forest soil and were taxonomically characterized by a polyphasic approach. Both strains were yellow-coloured, Gram-stain-negative, strictly aerobic, non-motile and rod-shaped bacteria. The strains were non-sporulating, catalase-positive and oxidase-negative. Strains J116-2(T) and J116-1 were able to grow at 20-32 °C, pH 6.0-8.5, and 0-0.5 % (w/v) NaCl concentration. Based on 16S rRNA gene sequence analyses, strains J116-2(T) and J116-1 formed a distinct lineage within the family Chitinophagaceae of the phylum Bacteroidetes and were closely related to genera Taibaiella (89...
November 15, 2017: International Journal of Systematic and Evolutionary Microbiology
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