scholarly journals Modification of the Method for Determining Myeloperoxidase in Blood Neutrophils

2021 ◽  
Author(s):  
Tatyana R. Korablyeva ◽  
Ivan V. Senchuk ◽  
Elizaveta E. Ageeva

Myeloperoxidase is a heme-containing peroxidase expressed primarily in neutrophils and to a lesser extent in monocytes. Determining the activity of myeloperoxidase in blood cells is one of the tests of the immune status of animals. Conventional methods are based on the oxidation of benzidine by the peroxide system to the unstable benzidine blue, which spontaneously turns into stable brown benzidine. The aim of this study was to develop a modification of the cytological determination of the myeloperoxidase enzyme using metol. The relative percentage of peroxidase-positive neutrophils in the peripheral blood of animals was determined after 100 neutrophils had been counted. The task was achieved by using the reaction with metol in the method of cytological determination of the activity of neutrophil myeloperoxidase in animal blood smears, which was based on the oxidation of metol by a peroxide system. Images of micropreparations were digitized using a Sony device for processing the received images of the cells. The Image Tool computer program was used for this purpose. The biological substrate was processed from a buffer-incubation mixture with subsequent drying and microscopy. The main new modification of the method was using metol. Metol does not have the ability to inhibit the activity of myeloperoxidase. The research showed easy and fast results. This method is economical and perspective for using in practice. Keywords: myeloperoxidase, blood, neutrophils, metol

2015 ◽  
Vol 96 (2) ◽  
pp. 177-181
Author(s):  
G M Khaybullina

Aim. To explore the enzymes in blood cells of newborns from mothers with iron deficiency anemia.Methods. During the study, 150 infants and their mothers underwent clinical and laboratory examination, of whom 130 infants had antenatal iron deficiency of different severity (main group), 20 children were included in the control group. Cytochemical analysis of peripheral blood was performed on 1st, 3rd, 7th day after birth by smear staining and determination of succinate dehydrogenase in lymphocytes, myeloperoxidase in neutrophils, acid and alkaline phosphatase in neutrophils and lymphocytes by microscopic analysis.Results.Succinate dehydrogenase activity was reduced on the 3rd day of life in lymphocytes of the newborns of the first group who were delivered off by mothers with latent iron deficiency. Average level of acid phosphatase in lymphocytes and neutrophils was higher compared to controls throughout the study (pConclusion. Cytochemical studies of peripheral blood neutrophils and lymphocytes may be used as a screening test to assess the immunity in newborns who were delivered off by mothers with iron deficiency, and for personalized management of patients with comorbidities.


Author(s):  
Buğra Okşaşoğlu ◽  
Ceylan Hepokur ◽  
Sema Misir ◽  
Çağlar Yildiz ◽  
Gamze Sönmez ◽  
...  

2017 ◽  
Vol 5 (5) ◽  
pp. 221-231
Author(s):  
Muhamed Katica ◽  
Nedzad Gradascevic

The laboratory rat, as important biomedical model, was often fed with unconventional diet usually made up of products from the bakery industry. Such diet consisted of insufficient caloric and nutritionally unbalanced meals could cause unreliable results in biomedical research. The study investigates the effects of malnutrition on the haematological profile of rats. The study is performed on Wistar male and female rats which were fed for 4 weeks exclusively with bakery products ad libidum. The following hematological parameters were observed in peripheral blood smears: red blood cell count, content of haemoglobin, haematocrit, MCV, MCH, MCHC, white blood cell count, differential blood count, diameter of red blood cells, as well as the presence of atypical forms of red blood cells. Despite there were no statistically significant differences in overall haematological results (p > 0.05, with > 0.05), the significant part of obtained results were below physiological limits (HGB, MCHC and MCH). Other haematological parameters, including white blood corpuscles were kept in physiological limits, except for mild neutrophils in males. Also, the forms of anulocytes and spherocytes were recorded in peripheral blood smears. The results indicated the beginning of normocytic hypochromic anaemia which was caused by unbalanced meals.


2020 ◽  
pp. 32-37
Author(s):  
О.А. Гусева ◽  
И.С. Мельников ◽  
Е.С. Зубкова ◽  
С.Г. Козлов ◽  
Ю.Н. Автаева ◽  
...  

Данные крупных проспективных исследований демонстрируют корреляционную связь уровня С-реактивного белка (СРБ) в крови и риска развития неблагоприятных сердечно-сосудистых событий. Однако остаются малоизученными уровень экспрессии СРБ клетками пери- ферической крови и их способность синтезировать СРБ. Цель исследования. Определение уровней экспрессии СРБ циркулирующими клетками периферической крови. Исследование экспрессии мРНК СРБ макрофагами, полученными из моноцитов периферической крови. Материал и методы. Исследовали эритроциты, тромбоциты и лейкоциты периферической крови 6 добровольцев в возрасте от 30 до 60 лет. Для идентификации фенотипа клеток крови применяли метод проточной цитофлюориметрии с использованием панели моноклональных ан- тител, конъюгированных с различными флюорохромами, а именно CD235a-PE-Cy7, CD41-APC, CD45-PerCP-Cy5.5 и CD14-APC-Cy-7. Уровень экспрессии клетками крови СРБ определяли по уровню флюоресценции связанных с целевыми клетками FITC-конъюгированных моноклональ- ных антител к СРБ («ИМТЕК», Россия). Для определения мРНК СРБ применяли метод количественной полимеразной цепной реакции (ПЦР) с последующим анализом специфичности амплификаций с помощью электрофореза в агарозном геле. Об экспрессии СРБ макрофагами, полученными из моноцитов периферической крови, судили по количеству мРНК, выделенной после их активации липополисахаридом (ЛПС). Результаты. Результаты исследования показали, что СРБ экспрессируют 85,0±10,5% моноцитов; лимфоциты, тромбоциты и эритроци- ты — 7,5±0,6, 3,0±0,3 и 4,3±0,5% соответственно. Методом количественной ПЦР в небольших количествах мРНК СРБ была зарегистри- рована в макрофагах, активированных ЛПС. Ее уровень незначительно, в 0,79±0,73 раза (p=0,96, n=6), отличался относительно гена «домашнего хозяйства». Заключение. Обнаружено, что СРБ присутствует на внешней клеточной мембране до 90% циркулирующих моноцитов и до 10% лимфо- цитов, в то время как эритроциты и тромбоциты не несут на своей поверхности СРБ. Установлена возможность синтеза СРБ стимулиро- ванными ЛПС макрофагами, полученными из моноцитов периферической крови. Data from major prospective studies demonstrate a correlation between blood C-reactive protein (CRP) levels and the risk of adverse cardiovascular events. However, the level of expression of CRP by peripheral blood cells and their ability to synthesize CRP remains poorly studied. The purpose of the study. Determination of CRP expression levels by circulating peripheral blood cells. Investigation of expression of CRP mRNA by macrophages obtained from peripheral blood monocytes. Material and methods. erythrocytes, platelets and leukocytes of peripheral blood were studied in 6 volunteers aged 30 to 60 years. To identify the blood cell phenotype, the method of flow cytofluorimetry was used using a panel of monoclonal antibodies conjugated with different fluorophores, namely, CD235a-PE-Cy7, CD41-APC, CD45-PerCP-Cy5.5 and CD14-APC-Cy-7. Blood cell expression level of CRP was determined by fluorescence level of FITC-conjugated monoclonal antibodies to CRP associated with target cells (IMTEK, Russia). The method of quantitative polymerase chain reaction (PCR) with the subsequent analysis of specificity of amplifications by electrophoresis in agarose gel was used for determination of mRNA of CRP. The expression of DRR by macrophages derived from peripheral blood monocytes was judged by the amount of mRNA isolated after their activation by lipopolysaccharide (LPS). The results. The results of the study showed that CRP express 85.0±10.5% monocytes, lymphocytes, platelets and red blood cells — 7.5±0.6, 3.0±0.3 and 4.3±0.5% respectively. The method of quantitative PCR in small amounts of CRP mRNA was registered in macrophages activated by LPS. Its level was insignificant, by 0.79±0.73 times (p=0.96, n=6), differed from the "household" gene. Conclusion. It was found that CRP is present on the outer cell membrane up to 90% of circulating monocytes and up to 10% of lymphocytes, while red blood cells and platelets do not carry CRP on their surface. The possibility of synthesis of CRP by stimulated LPS macrophages obtained from peripheral blood monocytes has been established


2003 ◽  
Vol 23 (9) ◽  
pp. 710-715 ◽  
Author(s):  
Simone Hennerbichler ◽  
Peter M Kroisel ◽  
Hannelore Zierler ◽  
Barbara Pertl ◽  
Reinhold Wintersteiger ◽  
...  

2017 ◽  
Vol 71 (2) ◽  
pp. 168-171 ◽  
Author(s):  
Antonio La Gioia ◽  
Maurizio Fumi ◽  
Paola Pezzati ◽  
Fiamma Balboni ◽  
Ylenia Pancione ◽  
...  

In recent years, several automated analysers that prepare and stain blood smears have been introduced in clinical laboratories. Despite the use of instrumental settings based on physical characteristic of individual samples, traumatic injuries of neutrophil and lymphocytes can be observed. Some samples present a very high percentage of damaged cells, allowing the speculation that a cellular susceptibility may enhance mechanical traumatism. These artefacts can puzzle morphological evaluation in both traditional and digitised microscopy; in addition, unskilled operators can be misled.


2013 ◽  
Vol 4 ◽  
Author(s):  
Majewska Alicja ◽  
Dembele Kourou ◽  
Gajewska Malgorzata ◽  
Motyl Tomasz

2019 ◽  
Vol 12 (1) ◽  
pp. 18-21
Author(s):  
Archana Shrivatava ◽  
◽  
Upasana Uniya ◽  
Reeni Malik ◽  
◽  
...  

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