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Camelina neglecta is a diploid species from the genus Camelina, which includes the versatile oilseed Camelina sativa. These species are closely related to Arabidopsis thaliana and the economically important Brassica crop species, making this genus a useful platform to dissect traits of agronomic importance while providing a tool to study the evolution of polyploids. A highly contiguous chromosome-level genome sequence of C. neglecta with an N50 size of 29.1 Mb was generated utilizing Pacific Biosciences (PacBio, Menlo Park, CA) long-read sequencing followed by chromosome conformation phasing. Comparison of the genome with that of C. sativa shows remarkable coincidence with subgenome 1 of the hexaploid, with only one major chromosomal rearrangement separating the two. Synonymous substitution rate analysis of the predicted 34 061 genes suggested subgenome 1 of C. sativa directly descended from C. neglecta around 1.2 mya. Higher functional divergence of genes in the hexaploid as evidenced by the greater number of unique orthogroups, and differential composition of resistant gene analogs, might suggest an immediate adaptation strategy after genome merger. The absence of genome bias in gene fractionation among the subgenomes of C. sativa in comparison with C. neglecta, and the complete lack of fractionation of meiosis-specific genes attests to the neopolyploid status of C. sativa. The assembled genome will provide a tool to further study genome evolution processes in the Camelina genus and potentially allow for the identification and exploitation of novel variation for Camelina crop improvement.
Assuntos
Arabidopsis , Brassica , Brassicaceae , Neglecta , Diploide , Brassicaceae/genética , Arabidopsis/genética , Brassica/genética , Genoma de PlantaRESUMO
Vernalization requirement is an integral component of flowering in winter-type plants. The availability of winter ecotypes among Camelina species facilitated the mapping of quantitative trait loci (QTL) for vernalization requirement in Camelina sativa. An inter and intraspecific crossing scheme between related Camelina species, where one spring and two different sources of winter-type habit were used, resulted in the development of two segregating populations. Linkage maps generated with sequence-based markers identified three QTLs associated with vernalization requirement in C. sativa; two from the interspecific (chromosomes 13 and 20) and one from the intraspecific cross (chromosome 8). Notably, the three loci were mapped to different homologous regions of the hexaploid C. sativa genome. All three QTLs were found in proximity to Flowering Locus C (FLC), variants of which have been reported to affect the vernalization requirement in plants. Temporal transcriptome analysis for winter-type Camelina alyssum demonstrated reduction in expression of FLC on chromosomes 13 and 20 during cold treatment, which would trigger flowering, since FLC would be expected to suppress floral initiation. FLC on chromosome 8 also showed reduced expression in the C. sativa ssp. pilosa winter parent upon cold treatment, but was expressed at very high levels across all time points in the spring-type C. sativa. The chromosome 8 copy carried a deletion in the spring-type line, which could impact its functionality. Contrary to previous reports, all three FLC loci can contribute to controlling the vernalization response in C. sativa and provide opportunities for manipulating this requirement in the crop.
Assuntos
Arabidopsis , Locos de Características Quantitativas , Vernalização , Flores , Mapeamento Cromossômico , Arabidopsis/genéticaRESUMO
Basidiobolomycosis is an opportunistic fungal infection with a high morbidity and mortality rate. It is known to cause invasive disease in immunocompromised persons but it may produce only cutaneous or subcutaneous infections in an immunocompetent patient. Treatment is difficult due to its fulminant course and lack of effective anti-fungal drugs. But here, we report a rare case of Basidiobolomycosis detected in an immunocompetent patient-without any debilitating illness, which showed a complete response to itraconazole 200 mg daily without any surgical intervention.
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Camelina sativa (L.) Crantz an oilseed crop of the Brassicaceae family is gaining attention due to its potential as a source of high value oil for food, feed or fuel. The hexaploid domesticated C. sativa has limited genetic diversity, encouraging the exploration of related species for novel allelic variation for traits of interest. The current study utilized genotyping by sequencing to characterize 193 Camelina accessions belonging to seven different species collected primarily from the Ukrainian-Russian region and Eastern Europe. Population analyses among Camelina accessions with a 2n = 40 karyotype identified three subpopulations, two composed of domesticated C. sativa and one of C. microcarpa species. Winter type Camelina lines were identified as admixtures of C. sativa and C. microcarpa Eighteen genotypes of related C. microcarpa unexpectedly shared only two subgenomes with C. sativa, suggesting a novel or cryptic sub-species of C. microcarpa with 19 haploid chromosomes. One C. microcarpa accession (2n = 26) was found to comprise the first two subgenomes of C. sativa suggesting a tetraploid structure. The defined chromosome series among C. microcarpa germplasm, including the newly designated C. neglecta diploid née C. microcarpa, suggested an evolutionary trajectory for the formation of the C. sativa hexaploid genome and re-defined the underlying subgenome structure of the reference genome.
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Brassicaceae , Brassicaceae/genética , Diploide , Genoma de Planta , Genótipo , CariótipoRESUMO
Scleromyxoedema is a rare generalized cutaneous mucinosis, which in absence of thyroid disease, occurs almost invariably in patients with monoclonal gammopathies. A 54-year-old female patient presented with complaint of tightening of skin on the extremities, abdomen, forehead, gradually progressive since 1 year, episodes of generalized tonic-clonic convulsions, and acute psychosis since 5 days. Cutaneous examination revealed nonpitting edema over the face and sclerodermoid changes over extremities. Laboratory investigations showed presence of M-band on serum-protein electrophoresis and monoclonal spike of IgG lambda component on immunofixation. Magnetic resonance imaging of the brain showed periventricular subcortical lacunar infarcts. Skin biopsy with mucin staining was suggestive of scleromyxoedema. All other investigations were normal. Bone marrow biopsy showed a mild focal increase in plasma cells. The cutaneous, serological, and electrophoretic findings as well as the clinical profile of the patient were consistent with the diagnosis of monoclonal gammopathy of undetermined significance associated with scleromyxoedema. This case is presented because of its rare occurrence.
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BACKGROUND: There is scarce scientific data on topical corticosteroids (TCS) prescription by non-dermatologists including registered medical practitioners, ayurvedic, homeopathic practitioners, and over-the-counter (OTC) use of TCS-containing creams. OBJECTIVE: The main objective of this study is to analyze the prescription and usage pattern of topical steroids among out-patient attendees with dermatophyte infection. To study health-seeking behavior of patients with dermatophyte infections. MATERIAL AND METHODS: An open, cross-sectional, duration-based study of 3 months. Inclusion criteria: Patients with dermatophytosis having a history of topical steroid application; either prescribed or purchased OTC and used themselves. Exclusion criteria: Patients who were not willing to give informed consent. Patient's data like socio-demographic profile, duration, frequency, site of application, contents of the topical cream used, prescriber information, and patients' desire to continue the use of topical steroids were recorded. RESULTS: Total of 18.40% (n = 503) patients were already using cream-containing TCS at the time of presentation to the tertiary dermatology care center. The study shows that almost half of the patients (48.90%) were using unprescribed TCS. Registered medical practitioners were the most common source of TCS creams prescription (59.92%) in the prescribed group, while 26.07% patients were prescribed TCS by dermatologists. Clobetasol propionate (47.91%), was most common steroid agent used. CONCLUSION: Patients are able to get "prescription-only" drugs as OTC products. Such OTC use of TCS puts patients at risk of steroid modified dermatophytosis and topical steroid damaged skin. Even dermatologists may be culprit in creating menace of steroid abuse.
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INTRODUCTION: Antifungals are one of the most widely used drugs in dermatology practice for dermatophytosis. Oral antifungal therapy against superficial dermatophytosis is generally associated with a low incidence of adverse events in an immunocompetent population. However, lately, cutaneous adverse drugs reactions (CADRs) have been reported with varying incidence rates in the patients on oral antifungal therapy with many uncommon morphological patterns. The present, observational study was conducted over a period of 4 months to report the cases which presented with antifungal therapy-associated CADRs. MATERIALS AND METHODS: It was an observational, prospective study carried out at a tertiary care center in Western India over a period of 4 months. All patients diagnosed with superficial dermatophytic infections (clinically and fungal hyphae seen on 10% potassium hydroxide mount) started on oral antifungal therapy, presenting with cutaneous manifestation other than the primary dermatophytosis were included. The incidence of CADRs due to oral antifungal agents and the percentage of each clinical type of the CADR observed was calculated. RESULTS: The incidence of CADRs due to antifungal drugs was 8.3 per 10,000 patients. In total, 35 cases were reported out of 4,208 cases of dermatophytosis. Terbinafine was the most common causative drug, accounting for nearly 83% of cases, followed by itraconazole for 14% cases, and griseofulvin for 2.8% of cases. CONCLUSION: The role of systemic antifungals must not be overlooked in any patient with a CADR and should be reported as a trend indicator.
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INTRODUCTION: Platelet-rich fibrin (PRF) is compressed by using various tools to make platelet-rich fibrin membrane (PRFM). Preservation of platelets and plasma content of PRFM depends on the compression method used. To overcome limitations of compression method, we prepared PRFM over scaffold of collagen sheet without using any compression device. AIMS AND OBJECTIVE: To prepare PRFM without using any compression device over a scaffold of collagen sheet and to evaluate its efficacy in chronic nonhealing ulcer. MATERIALS AND METHODS: PRFM was prepared, with minor modification in Choukron's protocol, over a collagen sheet without using compression device. To study its efficacy and reproducibility, total 15 patients over 18 years of age with chronic, nonhealing ulcers of more than 3 months of various causes were included and patients with active wound infection were excluded. RESULTS: We were able to prepare and reproduce PRFM by our technique. It overcomes the limitations of compression method with comparable efficacy to compression method. Results obtained on comparison at week 0, 3, and 6, by paired t-test, were found to be statistically significant (P < 0.0001). CONCLUSION: Preparation of PRFM with the method described is easy and reproducible. Use of collagen sheet synergistically improved wound healing.
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INTRODUCTION: Patient's satisfaction is the need of the hour and one of the most important quality indicators in the laboratory medicine. AIM: To assess the patient's satisfaction with phlebotomy services in a neuropsychiatric hospital by a structured questionnaire with grading scale. Also, identify the problems causing dissatisfactions and to undertake necessary Corrective and Preventative Action (CAPA). MATERIALS AND METHODS: Total 1200 patients were randomly selected over a period of two months (June and July 2016). A structured self designed questionnaire (feedback form) was devised in both Hindi and English languages containing ten questions with a grading scale for each question. It also included suggestions from the users. All the selected patients or their attendants filled up this questionnaire. At the same time, they were also interviewed by phlebotomy staff. A statistical analysis was conducted using SPSS version 16.0 software and Likert scale. RESULTS: A total of 94% of the patients were satisfied with the phlebotomy services. Almost 30.0% patients found the phlebotomy services to be very good, but the majority of them (40.5%) found it to be good and another 23.5% found it to be satisfactory while, 4% found the services to be poor and 2% found it to be very poor. The highest rate of satisfaction (4.21) was noted in case of parameter-ease to find collection sample room and lowest rate of satisfaction (3.92) was scored by the parameter-staff's wearing proper uniform. Depending upon the deficient areas some corrective actions were suggested such as strict compliance of personal protective equipments, regular training to improve technical skill, knowledge and behaviour with emphasis on cleanliness of work area. CONCLUSION: Even though the overall patient's satisfaction was high, there were areas which needed our attention such as waiting time for phlebotomy procedure, lack of proper sitting arrangement, techniques of sample collection, knowledge of universal precautions etc. Appropriate corrective and preventive actions were taken to solve the problems. Thereby, feedback proved effective in maintenance and improvement of phlebotomy services.
Assuntos
Anti-Inflamatórios/administração & dosagem , Antimetabólitos Antineoplásicos/administração & dosagem , Linfoma de Células T/diagnóstico , Linfoma de Células T/tratamento farmacológico , Paniculite/diagnóstico , Paniculite/tratamento farmacológico , Neoplasias Cutâneas/diagnóstico , Neoplasias Cutâneas/tratamento farmacológico , Adulto , Humanos , Masculino , Metotrexato/administração & dosagem , Prednisolona/administração & dosagemRESUMO
Cutaneous leishmaniasis is a disease caused by intracellular protozoal parasites belonging to the genus Leishmania. Immune suppression caused by HIV infection is an important factor for atypical presentation and widespread progression of cutaneous leishmaniasis. Diffuse (disseminated) cutaneous leishmaniasis and HIV co-infection is emerging as an extremely serious new disease. A 38-year-old HIV-positive man presented with a 12-month history of a progressive papule and nodular eruptions on face and extremities with infiltrations of nasal and oral mucosa. We report the case due to its atypical, widespread muco-cutaneous presentation masquerading as lepromatous leprosy.