
General Purpose Cell Encapsulation Device
- Protects cells in the device from autoimmune destruction
- Inhibits cell-to-cell contact and associated cell signals
- High membrane permeability to oxygen, nutrients andsecreted proteins
Options
Order code | Description | Size | Sterile |
505395 | TheraCyte Implantable Cell Device | 4.5 μL | Yes |
505396 | TheraCyte Implantable Cell Device | 20 μL | Yes |
505397 | TheraCyte Implantable Cell Device | 40 μL | Yes |
505398 | TheraCyte Implantable Cell Device, 4 ports | 40 μL | Yes |
BENEFITS
- No immune suppression needed to keep thetransplanted cells safe
- Allows for the easy implantation of all cells in oneprocedure
- Drug/protein evaluations can be terminated by deviceremoval
- The ability to execute a complete cell removal, byextracting the device, provides a significant safetybenefit
- Allows cells to be nourished through the normal hostblood supply
APPLICATIONS
- Diabetes
- Gene Therapy
- Therapeutic ProteinDelivery
- Protein Discovery
- Immunological Research
- Antibody Delivery
- Cell Transplantation
- Cell Differentiation
- Cytokine Therapy
- Pain Management
- Immunotherapy
- Cancer Therapy
- In Vivo Diagnostics
- Continuous ProteinDelivery
The TheraCyte device delivers high molecular proteins ofat least 900,000 Daltons, and it can be used for any samespecies cells research, without immune suppression orxenographs with immune suppression. It is perfect forthe delivery of proteins that are unstable and difficultto manufacture or purify. TheraCyte devices offercontinuous protein delivery.
20 Years of published, peer-reviewed research
TheraCyte is the only branded general purpose cellencapsulation device available worldwide to all researchers.It is the gold standard cell encapsulation device with 20 yearsof published peer reviewed research. With proven technique andprocess to support the development of new cell lines and proteinresearch, TheraCyte has developed an international reputationas a high quality brand.
TheraCyte cell encapsulation devices enable the developmentof cell-based therapeutic products for treating chronic andrecurrent diseases including diabetes, infection control, proteindeficiencies and immunological disorders.
The TheraCyte™ system for encapsulating and transplanting cellsis a thin membrane-based polymeric chamber. It is fabricatedfrom biocompatible membranes which protect allogeneiccells from rejection by the recipient and, when implantedsubcutaneously, induce the development of blood capillariesclose to the membranes. This vascularization feature provides arich blood supply to nourish the tissues within the membranes,aids in the communication of implanted cells with the host andassures rapid uptake of therapeutic molecules.
Cell Encapsulation - an overview | ScienceDirect Topics. (n.d.). Retrieved March 19, 2020, from https://www.sciencedirect.com/topics/medicine-and-dentistry/cell-encapsulation
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本人做动物实验,每组设7只,需要测定小鼠的相关指标,初次接触有几点不明白
1、测定指标时,是否可以每组7只,每只测定一次,一共测定7次?
2、是否可以每组选择3只,每只测定一次,共3次?
3、是否可以每组选择3只,每只自身平行测定3次,共9次?
4、测定指标时,是否可以前3只鼠测定A指标,后4只鼠测定B指标吗?
请问1、2、3中的三个方法哪种方法是否具有可行性?4中的测定方法是否可以?
血浆是由抗凝的血液中分离出来的液体,其中含有纤维蛋白原,若向血浆中加入Ca2+,血浆会发生再凝固,因此血浆中不含游离的Ca2+.血清是由凝固的血中分离出来的液体,其中已无纤维蛋白原,但含有游离的Ca2+,若向其中再加入Ca2+,血清也不会再凝固.此外,血浆与血清的另一个区别是:血清中少了很多的凝血因子,以及多了很多的凝血产物.
纤维蛋白已被除去(如通过血凝或去纤维蛋白法)的血浆
血液凝固析出的淡黄色透明液体。如将血液自血管内抽出,放入试管中,不加抗凝剂,则凝血反应被激活,血液迅速凝固,形成胶冻。凝血块收缩,其周围所析出之淡黄色透明液体即为血清,也可于凝血后经离心取得。在凝血过程中,纤维蛋白原转变成纤维蛋白块,所以血清中无纤维蛋白原,这一点是与血浆最大的区别。而在凝血反应中,血小板释放出许多物质,各凝血因子也都发生了变化。这些成分都留在血清中并继续发生变化,如凝血酶原变成凝血酶,并随血清存放时间逐渐减少以至消失。这些也都是与血浆区别之处。但大量未参加凝血反应的物质则与血浆基本相同。为避免抗凝剂的干扰,血液中许多化学成分的分析,都以血清为样品。(右图为血清蛋白)
作用:
●提供基本营养物质:氨基酸、维生素、无机物、脂类物质、核酸衍生物等,是细胞生长必须的物质。
●提供激素和各种生长因子:胰岛素、肾上腺皮质激素(氢化可的松、地塞米松)、类固醇激素(雌二醇、睾酮、孕酮)等。生长因子如成纤维细胞生长因子、表皮生长因子、血小板生长因子等。
●提供结合蛋白:结合蛋白作用是携带重要地低分子量物质,如白蛋白携带维生素、脂肪、以及激素等,转铁蛋白携带铁。结合蛋白在细胞代谢过程中起重要作用。
●提供促接触和伸展因子使细胞贴壁免受机械损伤。
●对培养中的细胞起到某些保护作用:有一些细胞,如内皮细胞、骨髓样细胞可以释放蛋白酶,血清中含有抗蛋白酶成分,起到中和作用。这种作用是偶然发现的,现在则有目的的使用血清来终止胰蛋白酶的消化作用。因为胰蛋白酶已经被广泛用于贴壁细胞的消化传代。血清蛋白形成了血清的粘度,可以保护细胞免受机械损伤,特别是在悬浮培养搅拌时,粘度起到重要作用。血清还含有一些微量元素和离子,他们在代谢解毒中起重要作用,如SeO3,硒等。
Nutrients.2017May10;9(5).
ClinicalSignificanceandPrognosticEffectofSerum25-hydroxyvitaminDConcentrationsinCriticalandSevereHand,FootandMouthDisease.
手足口病危重儿血清25-羟维生素D浓度的临床意义与预后影响
作者党红星,刘成军,李静,程时骄,许峰
摘要
Abstract
目的:探讨血清25羟维生素D[25(OH)D]浓度与手足口病危重症的关系及评估手足口病危重儿血清25-羟维生素D浓度的临床意义与预后影响。
OBJECTIVE:
Toexaminetheassociationofserum25-hydroxyvitaminD[25(OH)D]concentrationswithcriticalandseverehand,footandmouthdisease(HFMD)andassesstheclinicalsignificanceandprognosticeffectof25(OH)DconcentrationsinchildrenwithHFMD.
方法:本研究为前瞻性观察研究。
METHODS:
ThisisaProspectiveobservationalstudy.
将138例手足口病患儿分为普通组(49例)、重症组(52例)和危重组(37例)。另选取同期门诊体检的59例健康儿童作为对照组。
The138childrenwithHFMDweredividedintocommon(49cases),severe(52cases),andcritical(37cases)HFMDgroups.Another59healthychildrenundergoingoutpatientmedicalexaminationsduringthesameperiodwerechosenasthecontrolgroup.
测定所有对象的血清25(OH)D浓度,每组再分为血清25(OH)D正常组(≥30ng/mL);不足组(20-29.9ng/mL);缺乏组(低于20ng/mL)。
Serum25(OH)Dconcentrationsweremeasuredinallthesubjects,andeachgroupwassuBDividedbyserum25(OH)Dconcentrationinto25(OH)Dnormal(≥30ng/mL);insufficiency(20-29.9ng/mL),anddeficiency(<20ng/mL)groups.
手足口病危急重症组在入住儿科ICU(PICU)时记录小儿危重病例评分(PCIS)。
Thepediatriccriticalillnessscore(PCIS)wasrecordedforthecriticalandsevereHFMDgroupuponadmissiontothepediatricintensivecareunit(PICU).
监测小儿危重手足口病患者血乳酸(LAC)、血清钙离子(Ca2+)、D-二聚体(DD)、乳酸脱氢酶(LDH)、肌酸激酶同工酶(CK-MB)水平;脑干脑炎、神经源性肺水肿、循环衰竭的发生情况;14天病死率。
ChildrenwithcriticalandsevereHFMDwerealsomonitoredforbloodlactate(LAC),serumcalciumions(Ca++),D-dimer(DD),lactatedehydrogenase(LDH),andcreatinekinase-MB(CK-MB)levels;theincidencesofbrainstemencephalitis,neurogenicpulmonaryedema,andcirculatoryfailure;andthe14-daymortalityrate.
结果:
RESULTS:
各组血清25(OH)D浓度普遍较低。
Serum25(OH)Dconcentrationsweregenerallylowinallgroups.
与对照组(28.1±6.6ng/mL,8%)、普通组(29.5±8.1ng/mL,10%)和重症组(31.9±9.7ng/mL,8%)相比,危重组患者血清25(OH)D平均浓度(20.0±8.4ng/mL)明显较低,血清25(OH)D缺乏比例(18%)明显较高(P<0.05)。
ThecriticalHFMDgroupshowedasignificantlylowerserum25(OH)Dmeanconcentration(20.0±8.4ng/mL)andahigherproportionofdeficiency(18%)comparedwiththecontrolgroup(28.1±6.6ng/mL,8%),common(29.5±8.1ng/mL,10%)andsevere(31.9±9.7ng/mL,8%)HFMDgroups(p<0.05).
在危重组中,25(OH)D缺乏组比25(OH)D正常组及不足组具有更低的PCIS值(P<0.05);而比后两组具有更高LAC、LDH、CK-MB和DD;具有(更高的)脑干脑炎、神经源性肺水肿、循环衰竭发生率及病死率(P<0.05)。
InthecriticalandsevereHFMDgroups,the25(OH)DdeficiencygrouphadlowerPCISsthanthe25(OH)Dnormalandinsufficiencygroups(p<0.05);andhadhighervaluesthanthelattertwogroupsforLAC,LDH,CK-MBandDD;andtheincidencesofbrainstemencephalitis,neurogenicpulmonaryedema,circulatoryfailure,andmortality(p<0.05).
死亡组较存活组具有显著降低的血清25(OH)D浓度和PCIS(P<0.05),具有较高的LAC、LDH、CK-MB和DD水平;较高的脑干脑炎、神经源性肺水肿、循环衰竭发病率(P<0.05)。
Thedeathgroupshowedsignificantlylowerserum25(OH)DconcentrationsandPCISsthanthesurvivalgroup(p<0.05)andhadhigherLAC,LDH,CK-MBandDDlevelsandhigherincidencesofbrainstemencephalitis,neurogenicpulmonaryedema,andcirculatoryfailure(p<0.05).
Logistic回归分析显示,血清25(OH)D浓度是影响重症手足口病患儿病死率的独立因素。
Logisticregressionanalysisrevealedthattheserum25(OH)DconcentrationwasanindependentfactorthatinfluencedmortalityinchildrenwithcriticalandsevereHFMD.
CONCLUSIONS:
结论:
在这项研究中,我们发现,血清25(OH)D浓度在手足口病危重患儿中大幅降低,并与手足口病的严重程度相关。
Inthisstudy,wefindtheserum25(OH)DconcentrationsaresubstantiallyreducedinchildrenwithcriticalandsevereHFMDandareassociatedwiththeseverityofHFMD.
血清25(OH)D浓度对判断重症手足口病进展和预测死亡风险具有临床价值。
Theserum25(OH)DconcentrationsmayhaveclinicalvaluefordeterminingtheprogressionofcriticalHFMDandpredictingtheriskofdeath.
在确定25(OH)D浓度在手足口病诊断的临床价值之前,仍需进一步的证据。
Furtherevidenceisneededbeforeitcanbestatedthat25(OH)DconcentrationshaveclinicalvalueinHMFDdiagnosis.
关键词:
KEYWORDS:
25-hydroxyvitaminD;criticalillness;footandmouthdisease;hand
25羟维生素D;危重病;手足口病
想做临床的血标本的一些代谢组学研究,不知道应该用血浆还是血清,大家的说法好像也不太一致,请大神指导啊,最好有些参考文献,谢谢!

