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1.
Medisan ; 25(3)2021. tab, ilus
Article in Spanish | LILACS, CUMED | ID: biblio-1287303

ABSTRACT

Introducción: La sangre ovina constituye un suplemento esencial en la elaboración de medios de cultivo, dado que aporta factores nutricionales indispensables para el crecimiento y la recuperación de diversos microorganismos. Objetivo: Evaluar comparativamente el efecto de la sangre ovina, tanto citratada como desfibrinada, en medios de cultivo de base agar en cuanto al crecimiento bacteriano y la producción de hemólisis de cepas de referencia de diferentes bacterias patógenas, así como la recuperación o el aislamiento de microorganismos de muestras clínicas. Métodos: Se realizó un estudio observacional, descriptivo y transversal en 6 laboratorios de microbiología de la ciudad de Santiago de Cuba durante el año 2017, en los cuales se empleó sangre de ovinos de la raza pelibuey, para la elaboración de medios de cultivo. A cada laboratorio se le suministró tanto sangre citratada como desfibrinada y se le entregó una encuesta para valorar los resultados. Resultados: Existió un mejor crecimiento y aislamiento bacteriano en el medio suplementado con sangre desfibrinada, a pesar de que el rendimiento o los resultados en el caso de la sangre citratada resultaron satisfactorios. Conclusiones: Se confirmó la pertinencia del uso de la sangre desfibrinada como suplemento de enriquecimiento nutritivo en medios de cultivo; no obstante, quedó demostrada la utilidad de la sangre citratada en la labor de rutina del laboratorio de microbiología clínica.


Introduction: Sheep blood is an essential supplement in the elaboration of culture media, as it provides important nutritional factors for the growth and recovery of different organisms. Objective: To evaluate comparatively the effect of sheep citrated and defibrinated sheep blood in culture media with agar base as for the bacterial growth and the production of hemolysis in reference strains from different pathogen bacteria, as well as the recovery or isolation of microorganisms from clinical samples. Method: An observational, descriptive and cross-sectional was carried out in 6 microbiology laboratories in Santiago de Cuba city during 2017, in which male sheeps blood from the pelibuey breed for elaborating culture media. Each laboratory received either citrated blood or defibrinated and a survey was delivered to evaluate the results. Results: There was a better growing and bacterial isolation in the media supplemented with defibrinated blood, although yielding or results were favorable with citrated blood. Conclusions: The pertinence of the use of defibrinated blood as a supplement of nutritive enrichment in culture media was confirmed; however, the use of citrated blood was demonstrated in the routine work of the clinical microbiology laboratory.


Subject(s)
Sheep , Bacterial Growth , Culture Media , Hemolysis
2.
Acta méd. colomb ; 45(1): 40-43, Jan.-Mar. 2020. tab
Article in English | LILACS, COLNAL | ID: biblio-1124069

ABSTRACT

Abstract Wilson's disease is a rare genetic disorder that affects the excretion capacity of copper. Its distribution is worldwide, with an estimated prevalence in 30 cases per million habitants. Although the most frequent symptoms are those of hepatic and neuropsychiatric origin, hemolytic anemia with negative Coombs may be the only manifestation of the disease and its presentation usually precedes for months to clinically evident liver disease or neurological manifestations. The case of a young patient with negative Coombs hemolytic anemia and an alkaline phosphatase / total bilirubin ratio <4 and AST / ALT> 2.2 is presented, establishing Wilson's disease as a diagnosis. (Acta Med Colomb 2020; 45. DOI:https://doi.org/10.36104/amc.2020.1459).


Resumen La enfermedad de Wilson es un raro trastorno genético que afecta la capacidad de excreción del cobre. Su distribución es mundial, con una prevalencia estimada en 30 casos por millón de habitantes. Aunque los síntomas más frecuentes son los de origen hepático y neuropsiquiatricos, la anemia hemolítica con Coombs negativo puede ser la única manifestación de la enfermedad y su presentación suele preceder por meses a la enfermedad hepática clínicamente evidente o las manifestaciones neurológicas. Se presenta el caso de una paciente joven con anemia hemolítica Coombs negativo y relación fosfatasa alcalina/bilirrubina total <4 y AST/ALT >2,2, en quien terminó por establecerse como diagnóstico una enfermedad de Wilson.(Acta Med Colomb 2020; 45. DOI:https://doi.org/10.36104/amc.2020.1459).


Subject(s)
Humans , Adolescent , Anemia, Hemolytic , Coombs Test , Hemolysis , Hepatolenticular Degeneration
3.
Rev. bras. anal. clin ; 52(1): 48-52, 20200330. ilus
Article in Portuguese | LILACS | ID: biblio-1104464

ABSTRACT

Objetivo: Os concentrados de hemácias não estão livres de lesões de estoque, sendo a mais comum a lise das hemácias. Criar uma escala colorimétrica para inspeção visual do grau de hemólise de concentrados de hemácias. Métodos: Foram utilizadas 102 bolsas de concentrados de hemácias (n=36), concentrados de hemácias pobres em leucócitos (n=36) ou de concentrados de hemácias desleucotizadas (n=36), com até 28 dias da produção, em condições padrões de armazenamento e da rotina da Fundação Hemopa. Os valores de hemoglobina e hematócrito foram lidos em contador automatizado. O grau de hemólise foi realizado em amostras de 5 mL do segmento das bolsas, com leitura em espectrofotômetro. O teste de hemólise foi realizado com três gotas de amostras do segmento das bolsas, em tubo seco, adição de 4 mL de solução fisiológica, centrifugação e inspeção visual do sobrenadante (estudo duplo-cego). Para a confecção da escala colorimétrica foram utilizados os resultados de grau de hemólise e teste de hemólise (n=36) e registro fotográfico dos vários níveis de grau de hemólise das bolsas. Para a validação da escala colorimétrica foram realizados grau de hemólise e teste de hemólise para as bolsas restantes (n=66), e com os resultados comparados com a escala proposta (estudo duplo-cego). Resultados: Apenas 7,5% (5/66) das bolsas testadas foram negativas para o teste de hemólise clássico (visual), e positivas quando reavaliadas na escala colorimétrica proposta. Conclusão: A escala colorimétrica proposta mostrou-se simples e reproduzível para definição de teste de hemólise e o grau de hemólise para concentrados de hemácias.


Objective: Red blood cell (RBC) concentrates are not free of stock lesions, the most common of which is lysis of RBC. Create a colorimetric scale for visual inspection of the degree of hemolysis of bag red blood cells. Methods: Eighty-two bags of RBC concentrates (n = 36), RBC concentrates poor in leukocytes (n = 36) or RBC concentrates desleucotizadas (n = 36) were used with up to 28 days of production, under standard storage conditions of the Hemopa Foundation routine. Hemoglobin and hematocrit values were read in automated counter. The degree of hemolysis performed in 5ml samples from the bag segment, with spectrophotometer reading. The hemolysis test was performed with three drops of bag segment samples, in a dry tube, addition of 4 mL of physiological solution, centrifugation and visual inspection of the supernatant (double-blind study). To prepare the colorimetric scale used was the degree of hemolysis and hemolysis test results (n = 36) and photographic records of multiple levels of degree of hemolysis of bags. For the validation of the Colorimetric scale, hemolysis degree and hemolysis test were performed for the remaining bags (n = 66), and the results were compared with the proposed scale (double-blind study). Results: Only 7.5% (5/66) of the tested bags were negative for the classical (visual) hemolysis test, and positive when reevaluated on the proposed colorimetric scale. Conclusion: The proposed colorimetric scale was simple and reproducible for the definition of hemolysis test and the degree of hemolysis for RBC concentrates.


Subject(s)
Erythrocyte Transfusion , Hemotherapy Service , Hemolysis
4.
Article in Chinese | WPRIM | ID: wpr-828167

ABSTRACT

The high rotational speed of the axial flow blood pump and flow separation of the centrifugal blood pump are the main causes for blood damage in blood pump. The mixed flow blood pump can effectively alleviate the high rotational speed and the flow separation. Based on this, the purpose of this study is to explore the performance of the mixed blood pump with a closed impeller. A mixed flow blood pump with closed impeller was studied by numerical simulation in this paper. The flow field characteristics and the pressure distribution of this type of blood pump were analyzed. The hydraulic performance of the blood pump and the possible damages to red blood cells were also discussed. At last, pump performance was compared with the mixed flow blood pump with semi-open impeller. The results show that the mixed flow blood pump with close impeller studied in this paper can operate safely and efficiently with a good performance. The pump can reach the pressure head of 100 mmHg at 5 L/min mass flow rate. Flow in the blood pump is uniform and no obvious separation or vortex occurs. Pressure distribution in and on the impeller is uniform and reasonable, which can effectively avoid the thrombosis of blood. The average mean value of hemolysis index is 4.99 × 10 . The pump has a good biocompatibility. Compared with the mixed flow blood pump with semi-open impeller, the mixed flow blood pump with closed impeller has higher head and efficiency, a smaller mean value of hemolysis index prediction, a better hydraulic performance and the ability to avoid blood damage. The results of this study may provide a basis for the performance evaluation of the closed impeller mixed flow blood pump.


Subject(s)
Computer Simulation , Equipment Design , Heart-Assist Devices , Hemolysis , Humans , Thrombosis
5.
Article in Chinese | WPRIM | ID: wpr-827172

ABSTRACT

OBJECTIVE@#To study the gene mutants of G6PD deficiency and their clinical featuers among children in Luzhou area.@*METHODS@#732 children with suspected G6PD deficiency in Luzhou area from March 2017 to July 2019 were selected, which were examined for G6PD enzyme activity and gene mutation. The G6PD enzyme activity was detected by ultraviolet rate quantification, and the gene mutation was detected by melting curve analysis-based PCR assay, and the clinical characteristics of different mutants when acute hemolysis happens were analyzed.@*RESULTS@#387 positive specimens were detected in 732 specimens, among which the gene mutation and the enzyme activity decrease was found in specimens 326, 49 specimens showed gene mutation but without the enzyme activity decrease, and 12 specimens without gene mutation but with the enzyme activity decrease. Among 375 positive samples with gene mutation, c.1376G>T, c.1388G>A, c.1024C>T and c.95A>G were the most common. The enzyme activity of c.1376G>T and c.1388G>A was statistically significantly different with c.1024C>T. The most common incentives of acute hemolysis was broad bean, the reticulocyte count was statistically significantly different among c.1376G>T, c.1388G>A and c.95A>G. The hemoglobin level of c.1376G>T was statistically significantly different from with c.95A>G. Moreover, c.1376G>T, c.1388G>A was lower than c.1024 C>T. When acute hemolysis occurs, the reticulocyte count and hemoglobin changes were different between different mutation types, while the patients age, hospitalization time, blood transfusion, total bilirubin, and urine color recovery time of the patients were not statistically different.@*CONCLUSION@#The common mutants of G6PD deficiency among children in Luzhou area are c.1376G>T, and c.1388G>A, c.1024C>T. Favism is the most common clinical manifestation of G6PD deficiency.


Subject(s)
Child , Glucosephosphate Dehydrogenase , Glucosephosphate Dehydrogenase Deficiency , Hemolysis , Humans , Mutation
6.
Journal of Biomedical Engineering ; (6): 1000-1011, 2020.
Article in Chinese | WPRIM | ID: wpr-879230

ABSTRACT

Heart failure is one kind of cardiovascular disease with high risk and high incidence. As an effective treatment of heart failure, artificial heart is gradually used in clinical treatment. Blood compatibility is an important parameter or index of artificial heart, and how to evaluate it through hemodynamic design and


Subject(s)
Heart Failure , Heart, Artificial , Heart-Assist Devices , Hemodynamics , Hemolysis , Humans
7.
Autops. Case Rep ; 10(3): e2020185, 2020. tab, graf
Article in English | LILACS | ID: biblio-1131823

ABSTRACT

An 80-year-old Japanese woman with diabetes mellitus was admitted with gastrointestinal symptoms and pyrexia. At presentation, liver abscesses and severe hemolytic anemia were noted. Before detailed diagnostic evaluation and adequate treatment, she suddenly died 2.5 hours after admission. The autopsy and bacteriological examinations revealed liver abscesses and massive intravascular hemolysis caused by Clostridium perfringens as well as other miscellaneous critical pathological findings, including acute renal tubular necrosis, lung edema, and pulmonary fat embolism. In this article, the detailed autopsy results are described and clinicopathologic characteristics on Clostridium perfringens-related sudden death are discussed with a review of the literature.


Subject(s)
Humans , Female , Aged, 80 and over , Clostridium perfringens , Hemolysis , Autopsy , Fatal Outcome , Sepsis , Death, Sudden , Diabetes Mellitus , Embolism, Fat , Liver Abscess
8.
Rev. Soc. Bras. Med. Trop ; 53: e20190214, 2020. tab, graf
Article in English | LILACS | ID: biblio-1057290

ABSTRACT

Abstract INTRODUCTION: The aim of this study was to evaluate some virulence factors in Candida albicans isolates from patients with onychomycosis and determine the correlation between these factors and the antifungal resistance profile. METHODS: Seventy species of C. albicans were confirmed using polymerase chain reaction amplification of the HWP1 gene. According to the Clinical & Laboratory Standards Institute guidelines, the susceptibility profile of four antifungal agents was investigated, and the production of aspartyl protease, phospholipase, haemolysin, and biofilm was determined. The correlation between these profiles was also investigated. RESULTS: The isolates indicated different levels of resistance and production of virulence factors. Significant correlations were observed between the minimum inhibitory concentration (MIC) of fluconazole/itraconazole and biofilm production, between phospholipase production and fluconazole/itraconazole MIC, and between fluconazole MIC and hemolytic activity in C. albicans isolates. The results also showed significant correlations between phospholipase activity and biofilm production. CONCLUSIONS: Our findings will contribute to a better understanding of the pathogenesis of C. albicans and characterize the relationship between virulence factors and antifungal resistance, which may suggest new therapeutic strategies considering the possible involvement of the virulence mechanism in the effectiveness of treatment.


Subject(s)
Humans , Candida albicans/pathogenicity , Onychomycosis/microbiology , Virulence Factors , Antifungal Agents/pharmacology , Nails/microbiology , Phospholipases/biosynthesis , Candida albicans/drug effects , Candida albicans/ultrastructure , Microscopy, Electron, Scanning , Microbial Sensitivity Tests , Polymerase Chain Reaction , Biofilms/growth & development , Drug Resistance, Fungal , Aspartic Acid Proteases/biosynthesis , Hemolysis
9.
Rev. fac. cienc. méd. (Impr.) ; 16(2): 10-16, jul.- dic. 2019. tab
Article in Spanish | LILACS | ID: biblio-1140238

ABSTRACT

La anemia de células falciformes es un trastorno autosómico recesivo, causado por una mutación genética que codifica la cadena ß de globina. Objetivo: caracterizar al paciente con diagnóstico de anemia de células falciformes atendidos en el Servicio de Hematología y salas de hospitalización del Hospital Escuela Universitario, período enero 2016 -junio 2017. Material y métodos: estudio retrospectivo, descriptivo transversal. Se incluyen 72 historias clínicas de pacientes con diagnóstico de anemia de células falciformes. Se definieron las variables sobre el último episodio documentado, aspectos sociodemográficos, antecedentes, presentación clínica y valores de laboratorio. Resultados: la media para la edad fue 29.7+/-13; hombres 42(58.3%) y mujeres 30(41.6%). De ellos 46(63.9%) procedían de Francisco Morazán.; 38(52.8%) presentaron trombocitosis y 32(44.4%) tuvieron hiperbilirrubinemia al ingreso; 30(41.7%) presentaron complicación relacionada con crisis vaso-oclusiva sin fallecimientos, 23(31.9%) pacientes fueron atendidos en consulta externa y 49(68.1%) fueron hospitalizados. Conclusión: la mayoría de los pacientes con diagnóstico de anemia de células falciformes eran adultos jóvenes, de predominio masculino, manejados con hidroxiurea, opioides y antibioticoterapia, presentándose como crisis vaso-oclusiva y/o crisis dolorosa, sin casos de mortalidad...(AU)


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Hematology/methods , Anemia, Sickle Cell/diagnosis , Hemolysis , Anemia/complications
10.
Biosci. j. (Online) ; 35(6): 1979-1984, nov./dec. 2019. ilus, tab
Article in English | LILACS | ID: biblio-1049178

ABSTRACT

G6PD deficiency is associated with erythrocyte deficiency in the X-chromosome enzyme. It causes a hematologic syndrome called hemolytic anemia that connects G6PD deficiency with X-linked condition. In the Middle East, including Saudi Arabia, G6PD deficiency is the most dominant genetic blood disorders. It results in higher rates of mortality and morbidity due to its incurable long-lasting nature and prevalence of physical and psychological incapacities. In this study, an attempt was made to evaluate the prevalence of G6PD deficiency among the Saudi population in Riyadh city. A cross-sectional retrospective study was conducted at King Saud University Medical City in Riyadh, Saudi Arabia. The population of the study comprised randomly chosen males and females who visited the hospital from January 2017 to January 2018. Statistical analyses were performed using SPSS, and descriptive analysis was used to find the frequency of G6PD-deficient patients. Out of the 209 patients, 62.2% were males (n=130) and 37.8% were females (n=79). Twenty males and 6 females were found to have G6PD deficiency, with the male to female ratio being 1:3. Out of the total 130 male participants, 20 patients were found to be enzyme deficient and 6 patients of 79 female patients were found to be G6PD deficient. There were 38.4% (n=10) patients with G6PD level <4 units/gram hemoglobin, 26.9% (n=7) patients had G6PD levels of 4.1­7.0 units/gram hemoglobin, and 34.6% (n=9) patients had >7 units/gram hemoglobin. Among the G6PD patients, 23.07% patients were severely anemic, and 5 (19.2%) patients were reported to have high bilirubin. The present study revealed the G6PD prevalence to be 12.4% among the Saudi population; this value is significantly higher than that found in France, Spain, India, and Singapore. In the Saudi population, males are more vulnerable to G6PD-deficient than females. Hence, attention should be paid to G6PD-deficient patients while prescribing antimalarial medication. Such patients may be advised to avoid certain foods to minimize the risk of having hemolytic episodes.


A deficiência de G6PD está associada à deficiência de eritrócitos na enzima do cromossomo X. Causa uma síndrome hematológica chamada anemia hemolítica que conecta a deficiência de G6PD à condição ligada ao X. No Oriente Médio, incluindo a Arábia Saudita, a deficiência de G6PD é o distúrbio genético do sangue mais dominante. Isso resulta em maiores taxas de mortalidade e morbidade devido à sua natureza incurável e duradoura e à prevalência de incapacidades físicas e psicológicas. Neste estudo, foi feita uma tentativa de avaliar a prevalência de deficiência de G6PD entre a população saudita na cidade de Riade. Um estudo retrospectivo transversal foi realizado na cidade médica da Universidade King Saud, em Riade, na Arábia Saudita. A população do estudo compreendeu homens e mulheres escolhidos aleatoriamente que visitaram o hospital entre janeiro de 2017 e janeiro de 2018. As análises estatísticas foram realizadas com o SPSS e a análise descritiva foi utilizada para determinar a frequência de pacientes com deficiência de G6PD. Dos 209 pacientes, 62,2% eram do sexo masculino (n = 130) e 37,8% eram do sexo feminino (n = 79). Verificou-se que 20 homens e 6 mulheres apresentavam deficiência de G6PD, sendo a proporção homem/mulher de 1:3. Do total de 130 participantes do sexo masculino, 20 pacientes apresentaram deficiência de enzima e 6 de 79 pacientes do sexo feminino apresentaram deficiência de G6PD. Havia 38,4% (n = 10) pacientes com nível de G6PD < 4 unidades/grama de hemoglobina, 26,9% (n = 7) pacientes tinham níveis de G6PD de 4,1-7,0 unidades/grama de hemoglobina e 34,6% (n = 9) pacientes tinham > 7 unidades/grama de hemoglobina. Entre os pacientes com G6PD, 23,07% eram severamente anêmicos e cinco (19,2%) pacientes relataram ter alta bilirrubina. O presente estudo revelou que a prevalência de G6PD é de 12,4% na população saudita; esse valor é significativamente maior que o encontrado na França, Espanha, Índia e Cingapura. Na população saudita, os homens são mais vulneráveis à deficiência de G6PD do que as mulheres. Portanto, deve-se prestar atenção aos pacientes com deficiência de G6PD durante a prescrição de medicamentos antimaláricos. Esses pacientes podem ser aconselhados a evitar certos alimentos para minimizar o risco de episódios hemolíticos.


Subject(s)
Glucosephosphate Dehydrogenase , Hemolysis , Anemia, Hemolytic
11.
Rev. ciênc. méd., (Campinas) ; 28(1): 1-10, jan.-mar. 2019. tab
Article in English | LILACS | ID: biblio-1047794

ABSTRACT

Objective This study aimed to extract the essential oil of Curcuma longa rhizomes collected in Brazil, determine its composition by gas chromatography and mass spectrometry, and evaluate its hemolytic action and antimicrobial activity. Methods The oil extraction was performed by hydrodistillation; its composition was determined by GC-MS; the Minimum Inhibitory Concentration was evaluated through microdilution, and the hemolytic activity was analyzed in sheep red blood cells. Results The essential oil's major components are zingiberene (11%), sesquiphellandrene (10%), ß-turmerone (10%), and α-curcumene (5%). It proved efficient at inhibiting Staphylococcus aureus with Minimum Inhibitory Concentrations of 38.8µl/mL, Staphylococcus epidermidis (Minimum Inhibitory Concentrations of 50.0µl/mL), Escherichia coli (Minimum Inhibitory Concentrations of 44.4µl/mL), and Pseudomonas aeruginosa (Minimum Inhibitory Concentrations of 27.7µl/mL). Conclusion Despite provoking hemolysis in sheep red blood cells, the essential oil suggests promising results for a variety of purposes due to its antibacterial properties. Supplementary research is necessary to determine in vivo activity and the potential use of the C. longa essential oil as an antimicrobial agent in diverse situations.


Objetivo Este trabalho teve como objetivo determinar a composição e avaliar as atividades antimicrobiana e hemolítica do óleo essencial de rizomas da Curcuma longa L. Métodos A extração do óleo essencial foi realizada por hidrodestilação e sua composição determinada por cromatografia gasosa com espectrometria de massas. A Concentração Mínima Inibitória foi avaliada por microdiluição e a atividade hemolítica foi analisada em hemácias de carneiro. Resultados Os componentes majoritários encontrados foram zingibereno (11%), sesquipelenadieno (10%), ß-turmerona (10%) e α-curcumeno (5%). O óleo essencial provocou hemólise e inibiu Staphylococcus aureus (Concentração Mínima Inibitória=38,8µl/mL), Staphylococcus epidermidis (Concentração Mínima Inibitória=50,0µl/mL), Escherichia coli (Concentração Mínima Inibitória=44,4µl µl/mL) e Pseudomonas aeruginosa (Concentração Mínima Inibitória=27,7µl/mL). Conclusão Apesar de provocar hemólise, o óleo essencial analisado tem potencial para diversas finalidades, devido às suas propriedades antibacterianas. Estudos complementares são necessários para determinar a atividade in vivo e o potencial uso de óleo essencial de C. longa como agente antimicrobiano em diversas situações.


Subject(s)
Oils, Volatile , Curcuma , Gas Chromatography-Mass Spectrometry , Anti-Infective Agents , Hemolysis
12.
Bol. latinoam. Caribe plantas med. aromát ; 18(4): 359-377, jul. 2019. tab
Article in English | LILACS | ID: biblio-1008174

ABSTRACT

Plant species have been used for therapeutic purposes since ancient times and are still in use today since these products represent a source of raw material for the production of phytotherapeutic formulations. Screening and investigation of plants with pharmacological potential require the evaluation of characteristics related to their action, efficacy and safety in different steps. Among these steps, pre- clinical trials are used to evaluate the properties of the test product in in vitro experiments, such as cytotoxicity assays. Within this context, this study consists of a bibliometric analysis of some in vitro cytotoxicity and toxicity assays in erythrocytes used during bioprospecting of medicinal plants. The results demonstrated the wide application of erythrocytes to evaluate the biological effects of medicinal plant extracts. The methods were found to be valid and effective for the preliminary investigation of the in vitro cytotoxicity and toxicity of plant products.


El uso de especies vegetales para fines terapéuticos es una práctica histórica y todavía bastante actual, ya que estos productos pueden representar una fuente de materia prima para la producción de formulaciones fitoterápicas. En investigación de plantas con potencial farmacológico requiere la evaluación de su acción, eficacia y seguridad, a través de diferentes etapas. Entre estas, en los ensayos preclínicos se evalúan las propiedades del producto-prueba en experimentos in vitro, tales como ensayos de citotoxicidad, entre otros. En este aspecto, el presente estudio consiste en un análisis bibliométrico acerca de algunas pruebas de citotoxicidad y toxicidad in vitro en eritrocitos realizados en los ensayos de bioprospección de plantas medicinales. Los resultados evidencian la amplia utilización de eritrocitos para la evaluación de los efectos biológicos de extractos de plantas medicinales, apuntándolos como métodos válidos y eficaces para la investigación preliminar de la citotoxicidad y toxicidad in vitro de productos vegetales.


Subject(s)
Biological Assay/methods , Plant Extracts/toxicity , Erythrocytes/drug effects , Antioxidants/toxicity , Osmotic Fragility , Oxidative Stress , Erythrocytes/cytology , Bioprospecting , Hemolysis/drug effects
13.
Article in Korean | WPRIM | ID: wpr-719664

ABSTRACT

Neutrophilic leukemoid reaction may occur in many situations, including hemolysis, malignancy, infection, and exposure to certain toxins. It usually shows morphological overlap with chronic myeloid leukemia in which promyelocytes are not majorly associated. Here, we present a case of promyelocytic leukemoid reaction in a patient with sepsis. A 28-year-old man was admitted for renal stone removal. After percutaneous nephrolithotomy, his condition deteriorated with fever (37.8℃), tachycardia (130/min), acute renal failure, pleural effusion, and pulmonary edema. Complete blood count indicated a white blood cell count of 73.39×10⁹/L including 82% promyelocytes, hemoglobin 8.9 g/dL, and platelet count of 85×10⁹/L. A bone marrow aspirate showed that promyelocytes accounted for 73.8% of all nucleated cells. Following bone marrow examination, treatment with all-trans retinoic acid (ATRA) was started immediately. Reverse transcription polymerase chain reaction (RT-PCR) study revealed the absence of PML-RARA (promyelocytic leukemia-retinoic acid receptor alpha) and other RARA (retinoic acid receptor alpha) rearrangements. Once the chromosome analysis of bone marrow cells demonstrated the normal karyotype, ATRA was discontinued.


Subject(s)
Acute Kidney Injury , Adult , Blood Cell Count , Bone Marrow , Bone Marrow Cells , Bone Marrow Examination , Fever , Granulocyte Precursor Cells , Hemolysis , Humans , Karyotype , Leukemia, Myelogenous, Chronic, BCR-ABL Positive , Leukemia, Promyelocytic, Acute , Leukemoid Reaction , Leukocyte Count , Nephrostomy, Percutaneous , Neutrophils , Platelet Count , Pleural Effusion , Polymerase Chain Reaction , Pulmonary Edema , Reverse Transcription , Sepsis , Tachycardia , Tretinoin
14.
Article in Korean | WPRIM | ID: wpr-765647

ABSTRACT

BACKGROUND: Transfusion in neonates and infants can be performed using an electromechanical infusion system that has appropriate accuracy in terms of flow rate, volume, and bolus. However, there are no infusion systems approved for transfusion in Korea. In this study, we evaluate the performance of two electromechanical infusion systems for transfusion in pediatric patients. METHODS: We tested two systems, Baxter and Terumo, using 9 units of leukocyte-filtered red blood cells. The blood samples were delivered through the systems at constant speeds of 10, 30, and 100 mL/hr, and the accuracy in terms of the delivered volume was estimated. Before and after infusion, hemoglobin, hematocrit, plasma hemoglobin, potassium, and lactate dehydrogenase levels were measured in each sample. The percentage of hemolysis (%Hemolysis) was calculated to evaluate the safety of the infusion systems. RESULTS: For Terumo, the mean error rate of the infused volume was less than 5%. We expect that Terumo can transfuse blood at a volume close to the set volume. Further, both infusion systems showed acceptable %Hemolysis levels (mean±standard deviation: Terumo, 0.14±0.04; Baxter, 0.17±0.06). CONCLUSIONS: Both infusion systems can be used safely for transfusion in pediatric patients.


Subject(s)
Erythrocyte Transfusion , Erythrocytes , Hematocrit , Hemolysis , Humans , Infant , Infant, Newborn , Korea , L-Lactate Dehydrogenase , Plasma , Potassium
15.
Article in English | WPRIM | ID: wpr-765085

ABSTRACT

BACKGROUND: C-reactive protein (CRP) is an acute-phase protein whose level increases in response to tissue injury, infection, or other inflammation. It is used in clinical and forensic settings. Point-of-care (POC) testing has recently become available, and it is considered to be useful during postmortem examinations. However, laboratory testing of postmortem blood samples is difficult due to hemolysis and postmortem clotting. METHODS: The utility of POC testing for CRP during postmortem examination was evaluated using cardiac blood from the inferior vena cava. The whole blood sample was immediately tested using the POC instrument. Subsequently, the same sample was processed to obtain the serum, which was tested using common laboratory instruments. RESULTS: The postmortem POC test had a high positive predictive value and specificity, and the results strongly correlated with the laboratory test results. CONCLUSION: POC CRP testing is valid in postmortem examination and can be used in forensic medicine (postmortem inspection and autopsy).


Subject(s)
Acute-Phase Proteins , Autopsy , C-Reactive Protein , Forensic Medicine , Forensic Sciences , Hemolysis , Inflammation , Point-of-Care Systems , Point-of-Care Testing , Sensitivity and Specificity , Vena Cava, Inferior
16.
Article in English | WPRIM | ID: wpr-763032

ABSTRACT

Nitrogen-containing heterocycles such as quinoline, quinazolinones and indole are scaffolds of natural products and have broad biological effects. During the last years those structures have been intensively synthesized and modified to yield new synthetic molecules that can specifically inhibit the activity of dysregulated protein kinases in cancer cells. Herein, a series of newly synthesized isoquinolinamine (FX-1 to 8) and isoindoloquinazolinone (FX-9, FX-42, FX-43) compounds were evaluated in regards to their anti-leukemic potential on human B- and T-acute lymphoblastic leukemia (ALL) cells. Several biological effects were observed. B-ALL cells (SEM, RS4;11) were more sensitive against isoquinolinamine compounds than T-ALL cells (Jurkat, CEM). In SEM cells, metabolic activity decreased with 10 μM up to 26.7% (FX-3), 25.2% (FX-7) and 14.5% (FX-8). The 3-(p-Tolyl) isoquinolin-1-amine FX-9 was the most effective agent against B- and T-ALL cells with IC50 values ranging from 0.54 to 1.94 μM. None of the tested compounds displayed hemolysis on erythrocytes or cytotoxicity against healthy leukocytes. Anti-proliferative effect of FX-9 was associated with changes in cell morphology and apoptosis induction. Further, influence of FX-9 on PI3K/AKT, MAPK and JAK/STAT signaling was detected but was heterogeneous. Functional inhibition testing of 58 kinases revealed no specific inhibitory activity among cancer-related kinases. In conclusion, FX-9 displays significant antileukemic activity in B- and T-ALL cells and should be further evaluated in regards to the mechanisms of action. Further compounds of the current series might serve as templates for the design of new compounds and as basic structures for modification approaches.


Subject(s)
Apoptosis , Biological Products , Erythrocytes , Hemolysis , Humans , Inhibitory Concentration 50 , Leukocytes , Phosphotransferases , Precursor Cell Lymphoblastic Leukemia-Lymphoma , Precursor T-Cell Lymphoblastic Leukemia-Lymphoma , Protein Kinases , Quinazolinones
17.
Article in English | WPRIM | ID: wpr-758948

ABSTRACT

As an important zoonotic pathogen, Staphylococcus aureus has led to serious mastitis and endometritis in infected dairy cows. In this study, a total of 164 strains of S. aureus were isolated from dairy cows in Xinjiang Province, China, and subjected to assays to determine drug susceptibility and biofilm (BF) formation ability. Enterotoxin-related genes were detected, and the transcription levels of genes related to BF formation were determined by using reverse transcription-quantitative polymerase chain reaction. Moreover, the pathogenicity of isolates with different BF formation abilities was determined by measuring their hemolysis activity, half lethal dose (LD₅₀) and organ bacterial load. The results showed that 86.0% of S. aureus isolates could form BF. Among them, 42.1% of the strains had weak BF formation ability, and most strains with a strong BF formation ability were ica gene carriers. The S. aureus isolates displayed multidrug resistance and their drug resistance was positively correlated with their BF formation ability. Moreover, 96.3% of the S. aureus isolates carried enterotoxin genes. Among them, the detection rates of the novel enterotoxin genes were higher than those of conventional enterotoxin genes. Furthermore, isolates with a strong BF formation ability had higher LD50 but lower hemolysis ability and organ bacterial load than those of the isolates with weak or no BF ability. However, isolates without BF ability produced more severe pathological changes than those of isolates with strong BF formation ability. These findings suggest that higher BF ability and presence of novel enterotoxin genes are important characteristics of S. aureus isolates from dairy cows in Xinjiang Province, China, and such isolates may pose potential threats to food safety.


Subject(s)
Bacterial Load , Biofilms , China , Drug Resistance , Drug Resistance, Microbial , Drug Resistance, Multiple , Endometritis , Enterotoxins , Female , Food Safety , Hemolysis , Lethal Dose 50 , Mastitis , Polymerase Chain Reaction , Staphylococcus aureus , Staphylococcus , Virulence
18.
Article in English | WPRIM | ID: wpr-758885

ABSTRACT

To diagnose colibacillosis, detection of O-serogroups and virulence genes has been recommended worldwide. The prevalence of virulence factors can fluctuate over time. The objectives of this study were to determine the prevalence of O-serogroups, virulence genes, and F18 subtypes among pathogenic Escherichia coli isolated from weaned piglets with diarrhea in Korea. Between 2008 and 2016, 362 E. coli were isolated from weaned piglets with diarrhea. Hemolysis was determined in blood agar, and O-serogroups were identified using the slide agglutination technique. The genes for the toxins and fimbriae were amplified by polymerase chain reaction (PCR). Real-time PCR was conducted to discriminate between F18 subtypes. Although the most prevalent serogroup was O149 (11.3%) in the last 9 years, O139 (19.1%) became the most prevalent in recent years (2015–2016). The most predominant pathotype was enterotoxigenic E. coli (61.3%). The frequencies of Shiga-like toxin-producing E. coli (STEC) (23.4%), O139 (19.1%), Stx2e (35.1%), and F18ab (48.7%) increased over the most recent years. Although enterotoxigenic E. coli was the most predominant pathotype, the frequencies of O139, Stx2e, STEC, and F18ab have increased in recent years. These results demonstrate that there have been temporal changes in the predominant O-serogroups and virulence genes over the last decade in Korea. These findings can be practicable for use in epidemiology and control measures for enteric colibacillosis in Korean piggeries.


Subject(s)
Agar , Agglutination , Diarrhea , Enterotoxigenic Escherichia coli , Epidemiology , Escherichia coli , Escherichia , Hemolysis , Korea , Polymerase Chain Reaction , Prevalence , Real-Time Polymerase Chain Reaction , Serogroup , Shiga-Toxigenic Escherichia coli , Virulence Factors , Virulence
19.
Article in English | WPRIM | ID: wpr-758881

ABSTRACT

White blood cells (WBCs) and storage period are the main factors of transfusion reactions. In the present study, cytokine/chemokine concentrations after leukoreduction (LR) and irradiation (IR) in stored canine whole blood were measured. Red blood cell storage lesion caused by IR and LR were also compared. Blood samples from 10 healthy Beagles were divided into four groups (no treatment, LR-, IR-, and LR + IR-treated). Leukocytes were removed by filtration in the LR group and gamma radiation (25 Gy) was applied in the IR group. Immunologic factors (WBCs, interleukin-6 [IL-6], C-X-C motif chemokine ligand 8 [CXCL-8], and tumor necrosis factor-alpha) and storage lesion factors (blood pH, potassium, and hemolysis) were evaluated on storage days 0, 7, 14, 21, and 28. Compared to the treated groups, IL-6 and CXCL-8 concentrations during storage were significantly higher in the control (no treatment) group. LR did not show changes in cytokine/chemokine concentrations, and storage lesion presence was relatively mild. IR significantly increased CXCL-8 after 14 days of storage, but IR of leukoreduced blood did not increase CXCL-8 during 28 days of storage. Storage lesions such as hemolysis, increased potassium, and low pH were observed 7 days after IR and storage of blood, regardless of LR. IR of leukoreduced blood is beneficial to avoid immune reactions; however, storage lesions should be considered upon storage.


Subject(s)
Blood Preservation , Down-Regulation , Erythrocytes , Filtration , Gamma Rays , Hemolysis , Hydrogen-Ion Concentration , Immunologic Factors , Interleukin-6 , Leukocyte Reduction Procedures , Leukocytes , Necrosis , Potassium , Transfusion Reaction
20.
Article in Chinese | WPRIM | ID: wpr-771867

ABSTRACT

OBJECTIVE@#To establish the model of antibody-induced immune hemolytic disease in SD rats so as to provide an experimental platform for the exploration of its pathogenesis, course of disease and evaluation of drug efficacy.@*METHODS@#The red blood cells(RBC) of SD rats were isolated and intraperitoneally injected into BALB/c mice to induce production of the antiserum to SD rat RBC. Twenty SD rats were randomly divided into 2 groups. The rats in the model group were injected with 0.1 ml antiserum via tail vein; the rats in the control group were injected with 0.1 ml saline via tail vein.The symptoms of rats, hemolysis-related indexes and histopathological changes of the main organs were observed in both groups after injection.@*RESULTS@#After the injection of antiserum, the SD rats in the model group displayed nasal flaring, laziness, decrease of ingestion and water intake, skin and mucosal jaundice, and gross hemoglobinuria. At the 4th day after the injection, the body weight of SD rats in the model group was significantly lower than that in the control group (P<0.01), and the coefficiens of liver and spleen increased significantly (P<0.01); The levels of WBC, MCV, MCH, DBIL, DBIL/TBIL and FHb all increased statistically significantly, and RBC, Hb, HCT, MCHC and Plt levels decreased significantly in comparison with the control group (P<0.01). In the SD rats of model group, the hemolytic pathological changes were observed in liver, spleen, kidney, lung and small intestine, and erythroid proliferation was observed in bone marrow smears.@*CONCLUSION@#The immune hemolytic disease model of SD rats can be successfully established by injecting the serum aginst SD rat red blood cells into the tail vein of SD rats, showing the high success rate, good reproducibility and low cost.


Subject(s)
Animals , Hemolysis , Liver , Mice, Inbred BALB C , Rats , Rats, Sprague-Dawley , Reproducibility of Results
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