Wilson MD

References (4)

Title : The Role of Detoxification Enzymes in the Adaptation of the Major Malaria Vector Anopheles gambiae (Giles\; Diptera: Culicidae) to Polluted Water - King_2017_J.Med.Entomol_54_1674
Author(s) : King SA , Onayifeke B , Akorli J , Sibomana I , Chabi J , Manful-Gwira T , Dadzie S , Suzuki T , Wilson MD , Boakye DA , de Souza DK
Ref : Journal of Medical Entomology , 54 :1674 , 2017
Abstract : The main malaria vectors in sub-Saharan Africa, the Anopheles gambiae (Giles; Diptera: Culicidae), normally breed in clean water sources. However, evidence suggests an on-going adaptation of Anopheline species to polluted breeding habitats in urban settings. This study aimed at understanding the adaptation to breeding in water bodies with different qualities, in five selected mosquito breeding sites in urban Accra, Ghana. The study sites were also evaluated for the WHO water-quality parameters as a measure of pollution, and insecticide residues. Field mosquitoes were evaluated for five genes; CYP6P3, CYP4H19, CYP4H24, GSTD1-4, and ABCC11-associated with insecticide detoxification-using quantitative RT-PCR, as well as Mono-oxygenase, Alpha Esterase, Glutathione S-transferase, and insensitive acetylcholinesterase (AChE) using biochemical enzyme assays. The lab-reared, insecticide susceptible An. gambiae Kisumu strain was bred in the most polluted water source for 10 generations and evaluated for the same genes and enzymes. The results revealed that the fold expression of the genes was higher in the larvae compared with the adults. The results also suggest that detoxification enzymes could be involved in the adaptation of An. gambiae to polluted breeding sites. Correlation analysis revealed a highly positive significant correlation between calcium levels and all five genes (P < 0.05). Stepwise linear regression to understand which of the variables predicted the expression of the genes revealed that sulphate was responsible for ABCC11 and CYP4H24, alkalinity for GSTD1-4, and calcium for CYP4H19 and CYP6P3. The detailed genetic basis of this adaptation need to be further investigated. A further understanding of this adaptation may provide outlooks for controlling malaria and other disease vectors adapted to polluted breeding water sources.
ESTHER : King_2017_J.Med.Entomol_54_1674
PubMedSearch : King_2017_J.Med.Entomol_54_1674
PubMedID: 28968911

Title : Insecticide susceptibility of natural populations of Anopheles coluzzii and Anopheles gambiae (sensu stricto) from Okyereko irrigation site, Ghana, West Africa - Chabi_2016_Parasit.Vectors_9_182
Author(s) : Chabi J , Baidoo PK , Datsomor AK , Okyere D , Ablorde A , Iddrisu A , Wilson MD , Dadzie SK , Jamet HP , Diclaro JW, 2nd
Ref : Parasit Vectors , 9 :182 , 2016
Abstract : BACKGROUND: The increasing spread of insecticide resistance in malaria vectors has been well documented across sub-Saharan Africa countries. The influence of irrigation on increasing vector resistance is poorly understood, and is critical to successful and ethical implementation of food security policies. This study investigated the insecticide resistance status of An. gambiae (s.l.) mosquitoes collected from the irrigated rice area of Okyereko, a village containing about 42 hectares of irrigated field within an irrigation project plan in the Central Region of Ghana. Large amounts of insecticides, herbicides and fertilizers are commonly used in the area to boost the annual production of the rice. METHODS: Mosquito larvae were collected and adults were assayed from the F1 progeny. The resistance status, allele and genotype were characterized using WHO susceptibility testing and PCR methods respectively. RESULTS: The An. gambiae (s.l.) populations from Okyereko are highly resistant to DDT and pyrethroid insecticides, with possible involvement of metabolic mechanisms including the elevation of P450 and GST enzyme as well as P-gp activity. The population was mostly composed of An. coluzzii specimens (more than 96 %) with kdr and ace-1 frequencies of 0.9 and 0.2 %, respectively. CONCLUSION: This study brings additional information on insecticide resistance and the characterization of An. gambiae (s.l.) mosquitoes from Okyereko, which can be helpful in decision making for vector control programmes in the region.
ESTHER : Chabi_2016_Parasit.Vectors_9_182
PubMedSearch : Chabi_2016_Parasit.Vectors_9_182
PubMedID: 27030033

Title : CGI-58 knockdown in mice causes hepatic steatosis but prevents diet-induced obesity and glucose intolerance - Brown_2010_J.Lipid.Res_51_3306
Author(s) : Brown JM , Betters JL , Lord C , Ma Y , Han X , Yang K , Alger HM , Melchior J , Sawyer J , Shah R , Wilson MD , Liu X , Graham MJ , Lee R , Crooke R , Shulman GI , Xue B , Shi H , Yu L
Ref : J Lipid Res , 51 :3306 , 2010
Abstract : Mutations of Comparative Gene Identification-58 (CGI-58) in humans cause triglyceride (TG) accumulation in multiple tissues. Mice genetically lacking CGI-58 die shortly after birth due to a skin barrier defect. To study the role of CGI-58 in integrated lipid and energy metabolism, we utilized antisense oligonucleotides (ASOs) to inhibit CGI-58 expression in adult mice. Treatment with two distinct CGI-58-targeting ASOs resulted in approximately 80-95% knockdown of CGI-58 protein expression in both liver and white adipose tissue. In chow-fed mice, ASO-mediated depletion of CGI-58 did not alter weight gain, plasma TG, or plasma glucose, yet raised hepatic TG levels approximately 4-fold. When challenged with a high-fat diet (HFD), CGI-58 ASO-treated mice were protected against diet-induced obesity, but their hepatic contents of TG, diacylglycerols, and ceramides were all elevated, and intriguingly, their hepatic phosphatidylglycerol content was increased by 10-fold. These hepatic lipid alterations were associated with significant decreases in hepatic TG hydrolase activity, hepatic lipoprotein-TG secretion, and plasma concentrations of ketones, nonesterified fatty acids, and insulin. Additionally, HFD-fed CGI-58 ASO-treated mice were more glucose tolerant and insulin sensitive. Collectively, this work demonstrates that CGI-58 plays a critical role in limiting hepatic steatosis and maintaining hepatic glycerophospholipid homeostasis and has unmasked an unexpected role for CGI-58 in promoting HFD-induced obesity and insulin resistance.
ESTHER : Brown_2010_J.Lipid.Res_51_3306
PubMedSearch : Brown_2010_J.Lipid.Res_51_3306
PubMedID: 20802159
Gene_locus related to this paper: human-ABHD5 , mouse-abhd5

Title : Comparative analysis of the gene-dense ACHE\/TFR2 region on human chromosome 7q22 with the orthologous region on mouse chromosome 5 - Wilson_2001_Nucleic.Acids.Res_29_1352
Author(s) : Wilson MD , Riemer C , Martindale DW , Schnupf P , Boright AP , Cheung TL , Hardy DM , Schwartz S , Scherer SW , Tsui LC , Miller W , Koop BF
Ref : Nucleic Acids Research , 29 :1352 , 2001
Abstract : Chromosome 7q22 has been the focus of many cytogenetic and molecular studies aimed at delineating regions commonly deleted in myeloid leukemias and myelodysplastic syndromes. We have compared a gene-dense, GC-rich sub-region of 7q22 with the orthologous region on mouse chromosome 5. A physical map of 640 kb of genomic DNA from mouse chromosome 5 was derived from a series of overlapping bacterial artificial chromosomes. A 296 kb segment from the physical map, spanning ACHE: to Tfr2, was compared with 267 kb of human sequence. We identified a conserved linkage of 12 genes including an open reading frame flanked by ACHE: and Asr2, a novel cation-chloride cotransporter interacting protein Cip1, Ephb4, Zan and Perq1. While some of these genes have been previously described, in each case we present new data derived from our comparative sequence analysis. Adjacent unfinished sequence data from the mouse contains an orthologous block of 10 additional genes including three novel cDNA sequences that we subsequently mapped to human 7q22. Methods for displaying comparative genomic information, including unfinished sequence data, are becoming increasingly important. We supplement our printed comparative analysis with a new, Web-based program called Laj (local alignments with java). Laj provides interactive access to archived pairwise sequence alignments via the WWW. It displays synchronized views of a dot-plot, a percent identity plot, a nucleotide-level local alignment and a variety of relevant annotations. Our mouse-human comparison can be viewed at http://web.uvic.ca/~bioweb/laj.html. Laj is available at http://bio.cse.psu.edu/, along with online documentation and additional examples of annotated genomic regions.
ESTHER : Wilson_2001_Nucleic.Acids.Res_29_1352
PubMedSearch : Wilson_2001_Nucleic.Acids.Res_29_1352
PubMedID: 11239002
Gene_locus related to this paper: human-ACHE , mouse-ACHE