Anemia is a blood abnormality that affects the quantity and quality of red blood cells in the human body. This sometimes banal sign spares no continent and no social stratum. This anomaly is generally appreciated thro...Anemia is a blood abnormality that affects the quantity and quality of red blood cells in the human body. This sometimes banal sign spares no continent and no social stratum. This anomaly is generally appreciated through biological analyzes of patients</span><span style="font-family:Verdana;">’</span><span style="font-family:Verdana;"> blood. These analyzes, which boil down to the knowledge of hemato-metric constants, cannot by themselves allow the characterization of certain forms of anemia in the sense that most anemia are related to the morphology and color of red blood cells. Our work in this paper is to perform blood smears on patients and perform a morphological and colorimetric analysis of red blood cells on these smears. This approach allowed us to highlight on each erythrocyte morphological and colorimetric descriptors to accurately identify the types of anemia by image processing methods. This identification is performed in an automated environment to allow pathologists to respond quickly to anemia-related emergencies and also improve the treatment to be conducted. This automation required the implementation of a new approach to electronic instrumentation and the acquisition of microscopic blood smear images for the automatic and rapid diagnosis of anemia.展开更多
Litsea elliptica Blume leaves have been traditionally used as medicinal herbs because of its antimutagenicity,chemopreventative and insecticidal properties. In this study,the toxic effects of L. elliptica essential oi...Litsea elliptica Blume leaves have been traditionally used as medicinal herbs because of its antimutagenicity,chemopreventative and insecticidal properties. In this study,the toxic effects of L. elliptica essential oil against Sprague-Dawley rat’s red blood cells (RBCs) were evaluated. L. elliptica essential oil was given by oral gavage 5 times per week for 3 treated groups in the doses of 125,250,and 500 mg/(kg body weight),respectively,and the control group received distilled water. Full blood count,RBC osmotic fragility,RBC morphological changes,and RBC membrane lipid were analyzed 28 d after the treatment. Although L. elliptica essential oil administration had significantly different effects on hemoglobin (Hb),mean cell hemoglobin concentration (MCHC),mean cell volume (MCV),and mean cell hemoglobin (MCH) in the experimental groups as compared to the control group (P<0.05),the values were still within the normal range. L. elliptica induced morphological changes of RBC into the form of echinocyte. The percentage of echinocyte increased significantly among the treated groups in a dose-response manner (P<0.001). The concentrations of RBC membrane phospholipids and cholesterol of all treated groups were significantly lower than those of control group (P<0.001). However,the RBC membrane osmotic fragility and total proteins of RBC membrane findings did not differ significantly between control and treated groups (P>0.05). It is concluded that structural changes in the RBC membrane due to L. elliptica essential oil administration did not cause severe membrane damage.展开更多
目的通过比较西藏自治区阿里地区人民医院与陕西省两所医院健康新生儿出生后血氧饱和度(SpO_(2))水平和血常规水平,探索西藏自治区阿里地区新生儿出生后SpO_(2)水平与红细胞形态、功能的特点。方法本研究为盲法回顾性研究。选取阿里地...目的通过比较西藏自治区阿里地区人民医院与陕西省两所医院健康新生儿出生后血氧饱和度(SpO_(2))水平和血常规水平,探索西藏自治区阿里地区新生儿出生后SpO_(2)水平与红细胞形态、功能的特点。方法本研究为盲法回顾性研究。选取阿里地区人民医院、泾阳县人民医院和耀州区人民医院新生儿科2020年1月至2020年7月正常出生的167例足月新生儿,阿里地区人民医院出生新生儿(74例)为高原组,陕西省两所医院出生新生儿(93例)为平原组。监测正常足月新生儿断脐后10 min右上肢SpO_(2)及心率水平,同时采集废弃脐血进行血细胞分析。比较高原组与平原组足月正常新生儿出生后10 min SpO_(2)水平特点,与《新生儿复苏指南(2021年)》(后文统一简称《指南》)中SpO_(2)目标值进行比较,同时比较两组血细胞分析结果的差异。结果高原组出生新生儿出生1~10 min SpO_(2)水平低于平原组,差异有统计学意义(P<0.05)。高原组出生新生儿脐血白细胞计数、血小板计数低于平原组,差异有统计学意义(P<0.05);红细胞计数、血红蛋白高于平原组,差异有统计学意义(P<0.05);红细胞平均体积小于平原组,差异有统计学意义(P<0.05),平均血红蛋白量、平均血红蛋白浓度、红细胞分布宽度标准偏差及红细胞分布宽度变异系数高于平原组,差异有统计学意义(P<0.05)。高原组出生新生儿1~8 min SpO_(2)水平与《指南》目标值符合率明显低于平原组,差异有统计学意义(P<0.05)。高原组出生新生儿出生后第9 min、出生后第10 min,SpO_(2)水平与《指南》目标值符合率为100%,与平原组比较差异无统计学意义(P>0.05)。结论《指南》中出生后10 min SpO_(2)预期值适用于西藏自治区阿里地区新生儿,脐血红细胞特有形态及高血红蛋白含量和浓度可能是常驻藏族新生儿适应高原的原因之一。展开更多
Red blood cells(RBCs)can act as carriers for therapeutic agents and can substantially improve the safety,pharmacokinetics,and pharmacodynamics of many drugs.Maintaining RBCs integrity and lifespan is important for the...Red blood cells(RBCs)can act as carriers for therapeutic agents and can substantially improve the safety,pharmacokinetics,and pharmacodynamics of many drugs.Maintaining RBCs integrity and lifespan is important for the efficacy of RBCs as drug carrier.We investigated the impact of drug encapsulation by hypotonic dialysis on RBCs physiology and integrity.Several parameters were compared between processed RBCs loaded with l-asparaginase(“eryaspase”),processed RBCs without drug and non-processed RBCs.Processed RBCs were less hydrated and displayed a reduction of intracellular content.We observed a change in the metabolomic but not in the proteomic profile of processed RBCs.Encapsulation process caused moderate morphological changes and was accompanied by an increase of RBCs-derived Extracellular Vesicles release.Despite a decrease in deformability,processed RBCs were not mechanically retained in a spleen-mimicking device and had increased surface-to-volume ratio and osmotic resistance.Processed RBCs half-life was not significantly affected in a mouse model and our previous phase 1 clinical study showed that encapsulation of asparaginase in RBCs prolonged its in vivo half-life compared to free forms.Our study demonstrated that encapsulation by hypotonic dialysis may affect certain characteristics of RBCs but does not significantly affect the in vivo longevity of RBCs or their drug carrier function.展开更多
文摘Anemia is a blood abnormality that affects the quantity and quality of red blood cells in the human body. This sometimes banal sign spares no continent and no social stratum. This anomaly is generally appreciated through biological analyzes of patients</span><span style="font-family:Verdana;">’</span><span style="font-family:Verdana;"> blood. These analyzes, which boil down to the knowledge of hemato-metric constants, cannot by themselves allow the characterization of certain forms of anemia in the sense that most anemia are related to the morphology and color of red blood cells. Our work in this paper is to perform blood smears on patients and perform a morphological and colorimetric analysis of red blood cells on these smears. This approach allowed us to highlight on each erythrocyte morphological and colorimetric descriptors to accurately identify the types of anemia by image processing methods. This identification is performed in an automated environment to allow pathologists to respond quickly to anemia-related emergencies and also improve the treatment to be conducted. This automation required the implementation of a new approach to electronic instrumentation and the acquisition of microscopic blood smear images for the automatic and rapid diagnosis of anemia.
基金Project (No. 02-01-02-SF0205) supported by the Ministry of Science, Technology and Innovation of Malaysia
文摘Litsea elliptica Blume leaves have been traditionally used as medicinal herbs because of its antimutagenicity,chemopreventative and insecticidal properties. In this study,the toxic effects of L. elliptica essential oil against Sprague-Dawley rat’s red blood cells (RBCs) were evaluated. L. elliptica essential oil was given by oral gavage 5 times per week for 3 treated groups in the doses of 125,250,and 500 mg/(kg body weight),respectively,and the control group received distilled water. Full blood count,RBC osmotic fragility,RBC morphological changes,and RBC membrane lipid were analyzed 28 d after the treatment. Although L. elliptica essential oil administration had significantly different effects on hemoglobin (Hb),mean cell hemoglobin concentration (MCHC),mean cell volume (MCV),and mean cell hemoglobin (MCH) in the experimental groups as compared to the control group (P<0.05),the values were still within the normal range. L. elliptica induced morphological changes of RBC into the form of echinocyte. The percentage of echinocyte increased significantly among the treated groups in a dose-response manner (P<0.001). The concentrations of RBC membrane phospholipids and cholesterol of all treated groups were significantly lower than those of control group (P<0.001). However,the RBC membrane osmotic fragility and total proteins of RBC membrane findings did not differ significantly between control and treated groups (P>0.05). It is concluded that structural changes in the RBC membrane due to L. elliptica essential oil administration did not cause severe membrane damage.
文摘目的通过比较西藏自治区阿里地区人民医院与陕西省两所医院健康新生儿出生后血氧饱和度(SpO_(2))水平和血常规水平,探索西藏自治区阿里地区新生儿出生后SpO_(2)水平与红细胞形态、功能的特点。方法本研究为盲法回顾性研究。选取阿里地区人民医院、泾阳县人民医院和耀州区人民医院新生儿科2020年1月至2020年7月正常出生的167例足月新生儿,阿里地区人民医院出生新生儿(74例)为高原组,陕西省两所医院出生新生儿(93例)为平原组。监测正常足月新生儿断脐后10 min右上肢SpO_(2)及心率水平,同时采集废弃脐血进行血细胞分析。比较高原组与平原组足月正常新生儿出生后10 min SpO_(2)水平特点,与《新生儿复苏指南(2021年)》(后文统一简称《指南》)中SpO_(2)目标值进行比较,同时比较两组血细胞分析结果的差异。结果高原组出生新生儿出生1~10 min SpO_(2)水平低于平原组,差异有统计学意义(P<0.05)。高原组出生新生儿脐血白细胞计数、血小板计数低于平原组,差异有统计学意义(P<0.05);红细胞计数、血红蛋白高于平原组,差异有统计学意义(P<0.05);红细胞平均体积小于平原组,差异有统计学意义(P<0.05),平均血红蛋白量、平均血红蛋白浓度、红细胞分布宽度标准偏差及红细胞分布宽度变异系数高于平原组,差异有统计学意义(P<0.05)。高原组出生新生儿1~8 min SpO_(2)水平与《指南》目标值符合率明显低于平原组,差异有统计学意义(P<0.05)。高原组出生新生儿出生后第9 min、出生后第10 min,SpO_(2)水平与《指南》目标值符合率为100%,与平原组比较差异无统计学意义(P>0.05)。结论《指南》中出生后10 min SpO_(2)预期值适用于西藏自治区阿里地区新生儿,脐血红细胞特有形态及高血红蛋白含量和浓度可能是常驻藏族新生儿适应高原的原因之一。
基金funds from the FEDER through the Operational Programme for Competitiveness Factors and Employment 2007-2013 (France)from the Cancérop?le Ile de France (France)
文摘Red blood cells(RBCs)can act as carriers for therapeutic agents and can substantially improve the safety,pharmacokinetics,and pharmacodynamics of many drugs.Maintaining RBCs integrity and lifespan is important for the efficacy of RBCs as drug carrier.We investigated the impact of drug encapsulation by hypotonic dialysis on RBCs physiology and integrity.Several parameters were compared between processed RBCs loaded with l-asparaginase(“eryaspase”),processed RBCs without drug and non-processed RBCs.Processed RBCs were less hydrated and displayed a reduction of intracellular content.We observed a change in the metabolomic but not in the proteomic profile of processed RBCs.Encapsulation process caused moderate morphological changes and was accompanied by an increase of RBCs-derived Extracellular Vesicles release.Despite a decrease in deformability,processed RBCs were not mechanically retained in a spleen-mimicking device and had increased surface-to-volume ratio and osmotic resistance.Processed RBCs half-life was not significantly affected in a mouse model and our previous phase 1 clinical study showed that encapsulation of asparaginase in RBCs prolonged its in vivo half-life compared to free forms.Our study demonstrated that encapsulation by hypotonic dialysis may affect certain characteristics of RBCs but does not significantly affect the in vivo longevity of RBCs or their drug carrier function.
