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Sims M, Helal Z, Levin M, Rittenhouse T, Hawley J, Risatti GR. Suburban Population of Bobcats (Lynx rufus) in Connecticut, USA, Tested Negative for SARS-CoV-2, November 2021-February 2022. J Wildl Dis 2024; 60:193-197. [PMID: 37924242 DOI: 10.7589/jwd-d-23-00054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Accepted: 08/23/2023] [Indexed: 11/06/2023]
Abstract
A SARS-CoV-2 genomic and serologic survey was performed in a population of bobcats (Lynx rufus) inhabiting the state of Connecticut, USA. Wild animal populations are becoming established in densely populated cities with increased likelihood of direct or indirect contact with humans, as well as with household cats and dogs. Wild-caught bobcats (n=38) tested negative for SARS-CoV-2 genomic RNA by reverse-transcription quantitative PCR and for virus-neutralizing antibodies by ELISA, suggesting that either the species is not susceptible to SARS-CoV-2 or that the surveyed population has not yet been exposed to a source of infectious virus. However, this limited survey cannot rule out that human-to-bobcat or unknown reservoir-to-bobcat transmission of the virus occurs in nature.
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Affiliation(s)
- Maureen Sims
- Department of Pathobiology and Veterinary Science, College of Agriculture, Health and Natural Resources, University of Connecticut, Atwater Lab Bldg., 61 North Eagleville Road, Unit 3089, Storrs, Connecticut 06269-3089, USA
- Connecticut Veterinary Medical Diagnostic Laboratory, Department of Pathobiology and Veterinary Science, College of Agriculture, Health and Natural Resources, University of Connecticut, Atwater Lab Bldg., 61 North Eagleville Road, Unit 3089, Storrs, Connecticut 06269-3089, USA
- These authors contributed equally
| | - Zeinab Helal
- Department of Pathobiology and Veterinary Science, College of Agriculture, Health and Natural Resources, University of Connecticut, Atwater Lab Bldg., 61 North Eagleville Road, Unit 3089, Storrs, Connecticut 06269-3089, USA
- Connecticut Veterinary Medical Diagnostic Laboratory, Department of Pathobiology and Veterinary Science, College of Agriculture, Health and Natural Resources, University of Connecticut, Atwater Lab Bldg., 61 North Eagleville Road, Unit 3089, Storrs, Connecticut 06269-3089, USA
- These authors contributed equally
| | - Milton Levin
- Department of Pathobiology and Veterinary Science, College of Agriculture, Health and Natural Resources, University of Connecticut, Atwater Lab Bldg., 61 North Eagleville Road, Unit 3089, Storrs, Connecticut 06269-3089, USA
| | - Tracy Rittenhouse
- Department of Natural Resources and the Environment, College of Agriculture, Health and Natural Resources, Wildlife and Fisheries Conservation Center, University of Connecticut, Wilfred B. Young Bldg., 1376 Storrs Road, Storrs, Connecticut 06269-4087, USA
| | - Jason Hawley
- Connecticut Department of Energy and Environmental Protection, Wildlife Division, 79 Elm Street, Hartford, Connecticut 06106-5127, USA
| | - Guillermo R Risatti
- Department of Pathobiology and Veterinary Science, College of Agriculture, Health and Natural Resources, University of Connecticut, Atwater Lab Bldg., 61 North Eagleville Road, Unit 3089, Storrs, Connecticut 06269-3089, USA
- Connecticut Veterinary Medical Diagnostic Laboratory, Department of Pathobiology and Veterinary Science, College of Agriculture, Health and Natural Resources, University of Connecticut, Atwater Lab Bldg., 61 North Eagleville Road, Unit 3089, Storrs, Connecticut 06269-3089, USA
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Huang H, Hao Z, Long L, Yin Z, Wu C, Zhou X, Zhang B. Dermatopontin as a potential pathogenic factor in endometrial cancer. Oncol Lett 2021; 21:408. [PMID: 33841569 PMCID: PMC8020378 DOI: 10.3892/ol.2021.12669] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 02/23/2021] [Indexed: 02/06/2023] Open
Abstract
The present study aimed to determine the differential expression profiles of proteins in endometrial carcinoma and to screen the proteins associated with the occurrence and development of endometrial cancer (EC). In total, 15 samples of human EC and paracancerous tissues were selected for proteomic analysis using a label-free quantification method based on liquid chromatography-tandem mass spectrometry. The differential proteins were analysed using bioinformatics and verified using reverse transcription-quantitative PCR (RT-qPCR) and western blotting. Finally, the expression of differential proteins in 75 endometrial carcinoma samples and 30 normal endometrial tissue samples were detected using immunohistochemical staining, and the associations between differential protein expression and clinicopathological features were analysed. In total, 579 up-regulated proteins and 346 down-regulated proteins were identified between the two groups and seven proteins with the most significant differences were selected; these proteins included interferon-induced protein with tetratricopeptide repeats 3, poly(ADP-ribose) polymerase family member 9, solute carrier family 34 member 2, cytochrome b5 reductase 1, protein tyrosine phosphatase non-receptor type 1, dermatopontin (DPT) and secretory leukocyte peptidase inhibitor. RT-qPCR and western blotting showed that DPT expression was down-regulated (P<0.001), which was consistent with the mass spectrometry results. The immunohistochemical staining results showed that the positive expression of DPT in EC and normal endometrial tissues was statistically significant (P<0.001). The positive expression of DPT was significantly decreased in poorly differentiated, late stage, lymph node metastasis and myometrial invasion depth ≥1/2 samples (P<0.05). DPT expression was significantly lower in EC, which might play role in the pathogenesis of EC.
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Affiliation(s)
- Haiyun Huang
- Department of Obstetrics and Gynaecology, Xuzhou Central Hospital, Affiliated Xuzhou Clinical College of Xuzhou Medical University, Xuzhou, Jiangsu 221004, P.R. China
| | - Zhixiang Hao
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 221004, P.R. China
| | - Lingyan Long
- Department of Obstetrics and Gynaecology, Xuzhou Central Hospital, Affiliated Xuzhou Clinical College of Xuzhou Medical University, Xuzhou, Jiangsu 221004, P.R. China
| | - Zeyuan Yin
- Department of Obstetrics and Gynaecology, Xuzhou Central Hospital, Affiliated Xuzhou Clinical College of Xuzhou Medical University, Xuzhou, Jiangsu 221004, P.R. China
| | - Chenyu Wu
- Department of Obstetrics and Gynaecology, Xuzhou Central Hospital, Affiliated Xuzhou Clinical College of Xuzhou Medical University, Xuzhou, Jiangsu 221004, P.R. China
| | - Xueyan Zhou
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu 221004, P.R. China
| | - Bei Zhang
- Department of Obstetrics and Gynaecology, Xuzhou Central Hospital, Affiliated Xuzhou Clinical College of Xuzhou Medical University, Xuzhou, Jiangsu 221004, P.R. China
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Muratore E, Cerutti F, Colombino E, Biasibetti E, Caruso C, Brovida C, Cavana P, Poncino L, Caputo MP, Peletto S, Masoero L, Capucchio MT. Feline morbillivirus in northwestern Italy: first detection of genotype 1-B. J Feline Med Surg 2020; 23:584-591. [PMID: 33140998 DOI: 10.1177/1098612x20969360] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
OBJECTIVES A novel morbillivirus was recently described in stray and domestic cats in Asia, the USA and Europe. Most cats infected with feline morbillivirus (FeMV) showed lower urinary tract or kidney disease. Although the association of FeMV infection and kidney diseases has been suggested, the virus pathogenicity remains unclear. The present study aimed to investigate the distribution of FeMV infection, as well as the relationship between FeMV infection and kidney diseases in cats from northwestern Italy. METHODS A total of 153 urine samples (150 individuals and three pools) and 50 kidney samples were collected and included in the study; total RNA was extracted and a reverse transcription quantitative PCR (RT-qPCR) was performed in order to identify FeMV. Kidneys were also submitted to anatomopathological examination. Phylogenetic analysis and isolation attempts were carried out on positive samples. In FeMV-positive cats, urinalysis and blood analysis were performed. RESULTS FeMV RNA was detected in 7.3% of urine samples and in 8% of kidney samples, both in healthy cats and in cats with clinical signs/post-mortem lesions compatible with kidney disease. At histopathological examination, tubulointerstitial nephritis (TIN) was shown in 3/4 positive kidney samples, but a clear relationship between FeMV and TIN was not observed. Isolation attempts were unsuccessful, although the urine sample of one castrated male cat hosted in a cattery showed a positive signal in RT-qPCR until the fourth cell passage. Phylogenetic analysis revealed that this FeMV strain belonged to genotype 1-B. In the same cattery, a second genotype 1-B variant was detected from a urine pool. Urinalysis showed proteinuria in three cats, while at blood analysis three cats presented altered creatinine levels. CONCLUSIONS AND RELEVANCE Data reported suggest the presence of a FeMV sub-cluster distinct from the strain previously isolated in Italy, whose role in renal disorders remains uncertain.
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Affiliation(s)
- Elvira Muratore
- Experimental Zooprophylactic Institute of Piedmont, Liguria and Aosta Valley, Turin, Italy
| | - Francesco Cerutti
- Experimental Zooprophylactic Institute of Piedmont, Liguria and Aosta Valley, Turin, Italy
| | - Elena Colombino
- Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
| | - Elena Biasibetti
- Experimental Zooprophylactic Institute of Piedmont, Liguria and Aosta Valley, Turin, Italy
| | - Claudio Caruso
- ASL CN1 - Animal Health, Racconigi District, Turin, Italy
| | | | - Paola Cavana
- Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
| | - Laura Poncino
- Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
| | | | - Simone Peletto
- Experimental Zooprophylactic Institute of Piedmont, Liguria and Aosta Valley, Turin, Italy
| | - Loretta Masoero
- Experimental Zooprophylactic Institute of Piedmont, Liguria and Aosta Valley, Turin, Italy
| | - Maria Teresa Capucchio
- Department of Veterinary Sciences, University of Turin, Grugliasco, Italy.,Institute of Science of Food Production, National Research Council, Grugliasco, Italy
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Naganuma T, Iinuma Y, Nishiwaki H, Murase R, Masaki K, Nakai R. Enhanced Bacterial Growth and Gene Expression of D-Amino Acid Dehydrogenase With D-Glutamate as the Sole Carbon Source. Front Microbiol 2018; 9:2097. [PMID: 30233558 PMCID: PMC6131576 DOI: 10.3389/fmicb.2018.02097] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 08/16/2018] [Indexed: 02/02/2023] Open
Abstract
In a search for life-supporting, not life-assisting, D-amino acid metabolism, an environmental strain that grows better with D-glutamate as the sole carbon source was isolated from an ordinary river. The strain, designated as A25, exhibited a faster growth rate and greater cell yield with D-glutamate than with L-glutamate. Conversely, the D/L ratio of total cellular glutamate was as low as 4/96, which suggests that D-glutamate is more likely catabolized than anabolized. Strain A25 was phylogenetically most closely related to the gamma-proteobacterial species Raoultella ornithinolytica, with a 16S rRNA gene sequence similarity of 100%. A standard strain, R. ornithinolytica JCM 6096T, also showed similarly enhanced growth with D-glutamate, which was proven for the first time. Gene expression of the enzymes involved in D-amino acid metabolism was assayed by reverse-transcription quantitative PCR (RT-qPCR) using specifically designed primers. The targets were the genes encoding D-amino acid dehydrogenase (DAD; EC 1.4.99.1), glutamate racemase (EC 5.1.1.3), D-glutamate oxidase (EC 1.4.3.7 or EC 1.4.3.15), and UDP-N-acetyl-α-D-muramoyl-L-alanyl-D-glutamate ligase (EC 6.3.2.9). As a result, the growth of strains A25 and R. ornithinolytica JCM 6096T on D-glutamate was conspicuously associated with the enhanced expression of the DAD gene (dadA) in the exponential phase compared with the other enzyme genes. Pseudomonas aeruginosa is also known to grow on D-glutamate as the sole carbon source but to a lesser degree than with L-glutamate. A standard strain of P. aeruginosa, JCM 5962T, was tested for gene expression of the relevant enzymes by RT-qPCR and also showed enhanced dadA expression, but in the stationary phase. Reduction of ferricyanide with D-glutamate was detected in cell extracts of the tested strains, implying probable involvement of DAD in the D-glutamate catabolizing activity. DAD-mediated catalysis may have advantages in the one-step production of α-keto acids and non-production of H2O2 over other enzymes such as racemase and D-amino acid oxidase. The physiological and biochemical importance of DAD in D-amino acid metabolism is discussed.
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Affiliation(s)
- Takeshi Naganuma
- Graduate School of Biosphere Science, Hiroshima University, Higashihiroshima, Japan.,School of Biological Science, Hiroshima University, Higashihiroshima, Japan.,Astrobiology Center, National Institutes of Natural Sciences, Tokyo, Japan
| | - Yoshiakira Iinuma
- Graduate School of Biosphere Science, Hiroshima University, Higashihiroshima, Japan
| | - Hitomi Nishiwaki
- Graduate School of Biosphere Science, Hiroshima University, Higashihiroshima, Japan
| | - Ryota Murase
- School of Biological Science, Hiroshima University, Higashihiroshima, Japan
| | - Kazuo Masaki
- National Research Institute of Brewing, Higashihiroshima, Japan
| | - Ryosuke Nakai
- Microbial and Genetic Resources Research Group, Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.,Applied Molecular Microbiology Research Group, Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, Sapporo, Japan
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Sun ZB, Zhang J, Sun MH, Li SD. Identification of genes related to chlamydospore formation in Clonostachys rosea 67-1. Microbiologyopen 2018; 8:e00624. [PMID: 29635882 PMCID: PMC6341034 DOI: 10.1002/mbo3.624] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 02/11/2018] [Accepted: 02/16/2018] [Indexed: 01/15/2023] Open
Abstract
Chlamydospores are specific structures that are of great significance to the commercialization of fungal biopesticides. To explore the genes associated with chlamydospore formation, a biocontrol fungus Clonostachys rosea 67‐1 that is capable of producing resistant spores under particular conditions was investigated by transcriptome sequencing and analysis. A total of 549,661,174 clean reads were obtained, and a series of differentially expressed genes potentially involved in fungal chlamydospore formation were identified. At 36 hr, 67 and 117 genes were up‐ and downregulated in C. rosea during chlamydospore production, compared with the control for conidiation, and 53 and 24 genes were up‐ and downregulated at 72 hr. GO classification suggested that the differentially expressed genes were related to cellular component, biological process, and molecular function categories. A total of 188 metabolism pathways were linked to chlamydospore production by KEGG analysis. Sixteen differentially expressed genes were verified by reverse transcription quantitative PCR, and the expression profiles were consistent with the transcriptome data. To the best of our knowledge, it is the first report on the genes associated with chlamydospore formation in C. rosea. The results provide insight into the molecular mechanisms underlying C. rosea sporulation, which will assist the development of fungal biocontrol agents.
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Affiliation(s)
- Zhan-Bin Sun
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jun Zhang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Man-Hong Sun
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shi-Dong Li
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
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Zhang J, Sun Z, Li S, Sun M. Identification of suitable reference genes during the formation of chlamydospores in Clonostachys rosea 67-1. Microbiologyopen 2017; 6. [PMID: 28677248 PMCID: PMC5635156 DOI: 10.1002/mbo3.505] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 05/10/2017] [Accepted: 05/17/2017] [Indexed: 11/11/2022] Open
Abstract
Clonostachys rosea is a potential biocontrol fungus that can produce highly resistant chlamydospores under specific conditions. To investigate the genes related to chlamydospore formation, we identified reliable reference genes for quantification of gene expression in C. rosea 67-1 during sporulation. In this study, nine reference genes, actin (ACT), elongation factor 1 (EF1), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), histone (HIS), RNA polymerase II CTD phosphatase Fcp1 (RPP), succinate-semialdehyde dehydrogenase (SSD), TATA-binding protein (TBP), ubiquitin (UBQ), and ubiquitin-conjugating enzyme (UCE), were selected and cloned from 67-1, and their expression stability during chlamydospore formation was determined using reverse transcription quantitative PCR and assessed using the software geNorm, NormFinder and BestKeeper. The Ct values of the candidates ranged from 19.9 to 29.7, among which HIS, ACT and SSD exhibited high expression levels. The statistical analysis showed that ACT and SSD were most stably expressed, while UBQ and GAPDH showed relatively large variations under different culture conditions. Calculation of pairwise variation value indicated that two reference genes were required for precise quantification. Finally, ACT and SSD were selected to normalize gene expression during chlamydospore production in C. rosea 67-1. To the best of our knowledge, this is the first report of SSD as a reference gene. This study will facilitate the accurate quantification of differentially expressed genes during the generation of chlamydospores and contribute to the investigation of the molecular mechanism underlying chlamydospore formation in C. rosea.
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Affiliation(s)
- Jun Zhang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhanbin Sun
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shidong Li
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Manhong Sun
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
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Pimentel F, Bonilla P, Ravishankar YG, Contag A, Gopal N, LaCour S, Lee T, Niemz A. Technology in MicroRNA Profiling: Circulating MicroRNAs as Noninvasive Cancer Biomarkers in Breast Cancer. ACTA ACUST UNITED AC 2014; 20:574-88. [PMID: 25524488 DOI: 10.1177/2211068214561788] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Indexed: 12/13/2022]
Abstract
This report describes technologies to identify and quantify microRNAs (miRNAs) as potential cancer biomarkers, using breast cancer as an example. Most breast cancer patients are not diagnosed until the disease has advanced to later stages, which decreases overall survival rates. Specific miRNAs are up- or downregulated in breast cancer patients at various stages, can be detected in plasma and serum, and have shown promising preliminary clinical sensitivity and specificity for early cancer diagnosis or staging. Nucleic acid testing methods to determine relative concentrations of selected miRNAs include reverse transcription, followed by quantitative PCR (RT-qPCR), microarrays, and next-generation sequencing (NGS). Of these methods, NGS is the most powerful approach for miRNA biomarker discovery, whereas RT-qPCR shows the most promise for eventual clinical diagnostic applications.
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Affiliation(s)
- Fernando Pimentel
- Keck Graduate Institute of Applied Life Sciences, Claremont, CA, USA
| | - Patricia Bonilla
- Keck Graduate Institute of Applied Life Sciences, Claremont, CA, USA
| | | | - Alec Contag
- Keck Graduate Institute of Applied Life Sciences, Claremont, CA, USA
| | - Nimish Gopal
- Keck Graduate Institute of Applied Life Sciences, Claremont, CA, USA
| | - Sarah LaCour
- Keck Graduate Institute of Applied Life Sciences, Claremont, CA, USA
| | - Trenton Lee
- Keck Graduate Institute of Applied Life Sciences, Claremont, CA, USA
| | - Angelika Niemz
- Keck Graduate Institute of Applied Life Sciences, Claremont, CA, USA
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Vannini L, Augustine Dunn W, Reed TW, Willis JH. Changes in transcript abundance for cuticular proteins and other genes three hours after a blood meal in Anopheles gambiae. Insect Biochem Mol Biol 2014; 44:33-43. [PMID: 24269292 PMCID: PMC3970321 DOI: 10.1016/j.ibmb.2013.11.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Revised: 10/24/2013] [Accepted: 11/05/2013] [Indexed: 05/03/2023]
Abstract
Numerous studies have examined changes in transcript levels after Anopheles gambiae takes a blood meal. Marinotti et al. (2006) used microarrays and reported massive changes in transcript levels 3 h after feeding (BF3h) compared to non-blood fed (NBF). We were intrigued by the number of transcripts for structural cuticular proteins (CPs) that showed such major differences in levels and employed paired-end (50 bp) RNA-seq technology to compare whole body transcriptomes from 5-day-old females NBF and BF3h. We detected transcripts for the majority of CPs (164/243) but levels of only 12 were significantly altered by the blood meal. While relative transcript levels of NBF females were somewhat similar to the microarray data, there were major differences in BF3h animals, resulting in levels of many transcripts, both for CPs and other genes changing in the opposite direction. We compared our data also to other studies done with both microarrays and RNA-seq. Findings were consistent that a small number of CP genes have transcripts that persist even in 5-day-old adults. Some of these transcripts showed diurnal rhythms (Rund et al., 2013; Rinker et al., 2013). In situ hybridization revealed that transcripts for several of these CP genes were found exclusively or predominantly in the eye. Transcripts other than for CPs that changed in response to blood-feeding were predominantly expressed in midgut and Malpighian tubules. Even in these tissues, genes responsible for proteins with similar functions, such as immunity or digestion, responded differently, with transcript levels for some rising and others falling. These data demonstrate that genes coding for some CPs are dynamic in expression even in adults and that the response to a blood meal is rapid and precisely orchestrated.
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Affiliation(s)
- Laura Vannini
- University of Georgia, Cellular Biology, Athens, GA 30602, USA.
| | - W Augustine Dunn
- University of California Irvine, Molecular Biology and Biochemistry, Irvine, CA 92697, USA.
| | - Tyler W Reed
- University of Georgia, Cellular Biology, Athens, GA 30602, USA.
| | - Judith H Willis
- University of Georgia, Cellular Biology, Athens, GA 30602, USA.
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Almeida T, Pinto G, Correia B, Santos C, Gonçalves S. QsMYB1 expression is modulated in response to heat and drought stresses and during plant recovery in Quercus suber. Plant Physiol Biochem 2013; 73:274-81. [PMID: 24161757 DOI: 10.1016/j.plaphy.2013.10.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Accepted: 10/04/2013] [Indexed: 05/15/2023]
Abstract
Cork oak is an economically important forest species showing a great tolerance to high temperatures and shortage of water. However, the mechanisms underlying this plasticity are still poorly understood. Among the stress regulators, transcription factors (TFs) are especially important since they can control a wide range of stress-inducible genes, which make them powerful targets for genetic engineering of stress tolerance. Here we evaluated the influence of increasing temperatures (up to 55 °C) or drought (18% field capacity, FC) on the expression profile of an R2R3-MYB transcription factor of cork oak, the QsMYB1. QsMYB1 was previously identified as being preferentially expressed in cork tissues and as having an associated alternative splicing mechanism, which results in two different transcripts (QsMYB1.1 and QsMYB1.2). Expression analysis by reverse transcription quantitative PCR (RT-qPCR) revealed that increasing temperatures led to a gradual down-regulation of QsMYB1 transcripts with more effect on QsMYB1.1 abundance. On the other hand, under drought condition, expression of QsMYB1 variants, mainly the QsMYB1.2, was transiently up-regulated shortly after the stress imposition. Recovery from each stress has also resulted in a differential response by both QsMYB1 transcripts. Several physiological and biochemical parameters (plant water status, chlorophyll fluorescence, lipid peroxidation and proline content) were determined in order to monitor the plant performance under stress and recovery. In conclusion, this report provides the first evidence that QsMYB1 TF may have a putative function in the regulatory network of cork oak response to heat and drought stresses and during plant recovery.
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Affiliation(s)
- Tânia Almeida
- Centro de Biotecnologia Agrícola e Agro-Alimentar do Alentejo (CEBAL)/Instituto Politécnico de Beja (IPBeja), Rua Pedro Soares, 7801-908 Beja, Portugal; Centre for Research in Ceramics & Composite Materials (CICECO), University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal; Departament of Biology & Centre for Environmental and Marine Studies (CESAM), University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
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