铁蛋白受体放射配体结合分析法

本文采用差速离心法制备胎盘微绒毛膜，用＾１２５Ｉ－Ｈｕｎｔｅｒ试剂联接标记铁蛋白，在国内首次建立了胎盘微绒毛膜铁蛋白受体放射配体分析法，并进行了最适反应条件及铁蛋白受体的特性研究。所标记的＾１２５Ｉ－铁蛋白放化纯达９５％以上，且免疫活性和生物活性均较好。用放射配体受体分析测定了１１例正常足月孕妇胎盘微绒毛膜铁蛋白受体数为（３．５３４±１．１０５）×１０＾１２位点／毫克膜蛋白，亲和力常数Ｋａ为（２．     

缺铁孕妇胎盘铁相关蛋白受体同步检测及意义

探讨胎盘微绒毛膜铁相关蛋白受体包括铁蛋白受体（ＦｎＲ）、转铁蛋白受体（ＴｆＲ）在孕母缺铁时表达的变化及其在母婴铁代谢中的作用,对此研究的重点是观察检测胎盘的有关指标。足月健康孕妇胎盘１１例,轻度ＩＤＡ孕妇胎盘１４例。采用差速离心法提取胎盘微绒毛膜蛋白,采用受体放射配体结合分析法检查ＦｎＲ、ＴｆＲ。结果数据：１１例健康孕妇胎盘ＴｆＲ位点数为（４．０５７±１．３２）×１０ｓｉｔｅｓ／ｍｇ·ｐｒｏ,Ｋａ值为（１．６２２±０．５８４）×１０ｍｏｌ－１。Ｌ;ＦｎＲ位点数为（３．５３４±１．１０５）×１０ｓｉｔｅｓ／ｍｇ·ｐｒｏ,Ｋａ值为（２．２０３±０．６２２）×１０ｍｏｌ－１．Ｌ。１４例轻度ＩＤＡ孕妇胎盘ＴｆＲ位点数为）６．９８４±１．７５４）×１０ｓｉｔｅｓ／ｍｇ·ｐｒｏ,Ｋａ为（１．５４１±０．７９４）×１０ｍｏｌ·Ｌ;ＦｎＲ位点数为（８．９３６±２．４０７）×１０ｓｉｔｅｓ／ｍｇ．ｐｒｏ,Ｋａ值为（１．２４９±０．３６５）×１０ｍｏｌｄ－１ｆ．Ｌ。轻度ＩＤＡ孕妇胎盘ＴｆＲ表达较正常高１．７２倍,ＦｎＲ表达较正常高出２．５３倍。结果表明：轻度ＩＤＡ孕妇胎盘ＴｆＲ、ＦｎＲ同步升高;此时胎盘可通过ＴｆＲ、ＦｎＲ的增?     

中期孕母不同铁营养状态时胎盘微绒毛膜铁蛋白受体表达及其意义

为了了解中孕期胎盘铁蛋白受体（FnR）表达水平及其在母-胎铁代谢中的作用，本文采用FnR放射配体结合分析法，对30例中孕期（16－28周）胎盘微绒毛膜FnR表达进行了研究。结果发现：（1）孕母铁状态正常时，胎盘微绒毛膜FnR位点数为（9．63士4．72）X1012个／mg膜蛋白，与同期测定的足月孕胎盘FnR的表达水平相似（P＞0．1）；（2）隐性缺铁及轻度缺铁性贫血时，FnR位点数明显增高（PO．25）。表明胎盘微绒毛膜FnR在母-胎铁代谢中起重要的转运及调节作用，提示中期孕母严重铁缺乏时可能影响胎盘的铁转运，进而影响胎儿的铁供给。     

糖皮质激素受体配体的研究进展

糖皮质激素(GCs)应用于临床已有60余年的历史,临床上常用于治疗免疫性疾病和过敏性疾病,尤其近年来,随着免疫性及炎症性疾病发病率的增长,GCs类药物的临床应用也呈逐年上升趋势。因此,GCs的不良反应问题也愈发受到关注。剖析GCs作用机制,找到新的糖皮质激素受体(GR)配体,使其既有抗炎及免疫抑制作用,且不伴不良反应是...     

转铁蛋白受体、铁蛋白及铁调节蛋白-1 mRNA 在铁缺乏胎儿胎盘中的表达

目的探讨铁转运相关蛋白mRNA在胎儿铁缺乏(ID)胎盘中的表达。方法根据脐血血清铁蛋白(SF)水平将研究对象分为ID组和铁充足(IS)组。采用RT-PCR方法测定两组胎盘转铁蛋白受体(TfR)、铁蛋白(Fn)和铁调节蛋白-1(IRP-1)mR- NA表达情况。结果 1．ID组TfR mRNA为1 10±0．26,明显高于IS组(t=0．028 P<0.05);2．ID组Fn mRNA为0．304± 0 095,明显低于IS组(t=0.014 P<0．05);3．ID组IRP-1 mRNA为0．278±0.073,与IS组无统计学差异(t=0．086 P> 0．05);4．胎盘TfR mRNA和脐血SF自然对数呈明显负相关(r=0.558 P<0 05),而Fn mRNA与脐血SF自然对数呈明显正相关(r=0．502 P<0．05)。结论胎儿ID时胎盘TfR mRNA表达升高,Fn mRNA减少,IRP-1 mRNA无明显变化,可最大程度地保证胎儿铁供应的相对恒定。     

脑脊液纤维结合蛋白和铁蛋白在CNSL的临床意义

本文观察了急性白血病患者ＣＳＦ－ＦＮ和Ｆ含量，结果ＣＮＳＬ患者ＣＳＦ－ＦＮ和Ｆ含量全部升高，与对照组及无ＣＮＳＬ组比较有极显著性差异（Ｐ〈０．０１）。１０例ＣＮＳＬ患者治疗后８例缓解的ＣＳＦ－ＦＮ和Ｆ明显下降；一例虽缓解但下降不明显，半月后复发。另一例病情恶性，ＣＳＦ－ＦＮ和Ｆ反较治疗前升高。无ＣＮＳＬ组３０例患者９例ＣＳＦ－ＦＮ增高，８／２３例ＣＳＦ－Ｆ增高，其中二项同时增高的有７例，随访１５－     

脑脊液纤维结合蛋白和铁蛋白在CNSL的临床意义

本文观察了急性白血病患者ＣＳＦ－ＦＮ和Ｆ含量，结果ＣＮＳＬ患者ＣＳＦ－ＦＮ和Ｆ含量全部升高，与对照组及无ＣＮＳＬ组比较有极显著性差异（Ｐ＜０．０１）。１０例ＣＮＳＬ患者治疗后８例缓解的ＣＳＦ－ＦＮ和Ｆ明显下降；一例虽缓解但下降不明显，半月后复发。另一例病情恶化，ＣＳＦ－ＦＮ和Ｆ反较治疗前升高。无ＣＮＳＬ组３０例患者９例ＣＳＦ－ＦＮ增高，８／２３例ＣＳＦ－Ｆ增高，其中二项同时增高的有７例，随访１５—８０天，有５例确诊为ＣＮＳＬ。本文提示ＣＮＳＬ确诊前ＣＮＳ已受到白血病细胞的浸润；ＣＳＦ－ＦＮ和Ｆ是诊断ＣＮＳＬ的敏感指标，有助于ＣＮＳＬ的早期诊断和疗效监测。     

G蛋白耦联受体54及其配体kisspeptin与能量代谢在青春期启动中的作用

近年来研究显示G蛋白耦联受体54(GPR54)及其配体kisspeptin曲是生殖系统重要的开关(gatekeeper),在青春发育启动中对激活性腺轴起了至关重要的作用.研究亦表明营养供给和机体的能量储备与青春发育和生殖功能密切相关.该文就近年来国内外有关GPR54、kisspeptin、能量代谢的各种因素与青春期启动的作用研究进展进行综述.     

THE INFLUENCE OF THE PLACENTAL TRANSFUSION ON THE CAPILLARY BLOOD GAS AND ACID-BASE BALANCE IN THE NEWBORN INFANT

Of 77 normal newborns, 42 were clamped early while 35 were clamped late. Using capillary blood from an unwarmed heel, the hema-tocrit and the acid-base balance of the two groups were compared. During the first day of life the hematocrit of late-clamped newborns was fairly constant and higher than that of early-clamped babies, the latter showing a definite fall 2–24 hours after birth. Regarding the acid-base balance, no difference was found between the two groups of newborns except when measurements were performed 3–5 hours after birth. At this time actual pH and standard bicarbonate were lower in late-clamped babies than in early-clamped, while P_CO2 was identical. On the basis of the hematocrit findings it is proposed that the placental transfusion, by creating oedema of the interstitial space, may contribute to the well known discrepancy between the acid-base status of the capillary and the arterial blood of the newborn.     

PLACENTAL TRANSFUSION IN THE PREMATURE INFANT WITH OBSERVATION ON CLINICAL COURSE AND OUTCOME

Blood volume was measured in 73 truly premature and 10 “small for date” term infants following early or late cord clamping at birth. Forty-five normal full term infants from a previous study were included for comparison. The results demonstrated that placental transfusion occurred if cord clamping was delayed. The amount of placental transfusion in terms of red cell volume per kg b.w. in the premature infants under 2001 g was less compared to that of both normal full term infants and premature infants above 2001 g. The clinical course showed high incidence and mortality from respiratory distress in premature infants under 2001 g. An interesting observation was the apparently higher mortality resulting from idiopathic respiratory distress syndrome in the late-clamped group weighing under 2001 g.     

血细胞胰岛素受体测定改良法的建立

传统的红细胞胰岛素受体（InsR）放射配基结合分析法需血标本量10ml。为此，本研究建立全血细胞InsR测定改良法，观察全血全量与去白细胞标本的差异。结果表明改良的全血半量法与全血全量法比较无显著差异，需血量3．5ml甚至2ml，有利于新生儿的研究。使用全血细胞进行InsR分析时，要考虑到白细胞InsR的参与作用。     

人外周血T淋巴细胞集落(TL—CFU)培养的研究

本文报道用PHA作为刺激物，采用简化的一步法在甲基纤维素培养基上培养人外周血T淋巴细胞集落（TL一CFU）获得成功，并对TL一CFU培养的适宜条件进行了探讨；同时，对集落组成细胞进行了T淋巴细胞表型分析；在此适宜条件下，对健康成人外周血TL—CFU产率进行了测定。结果显示：（1）培养体系中PHA2ul／ml、20％小牛血清（FCS）、5×10（－5）M2一巯基乙醇、0．8％甲基纤维素、60％RPMI1640、2×105MNC／ml、培养时间七天为TL—CFU培养的适宜条件；（2）集落组成细胞中CD3+细胞占92．5±4．59％、CD4+、CD8+细胞分别为57．83±7．85％及46．66±4．76％、CD4／CD8之比为1．24±0．17；（3）健康成人外周血TL一CFU产率为351．58±21.97／2×105MN。基于上述结果认为，该培养方法操作简便、集落产率高，为研究T淋巴细胞及其亚群提供了条件。     

[Ca2+]i介导胆红素神经毒性与NMDA受体拮抗剂GAPA治疗作用

探讨胆红素神经毒性脑组织细胞内Ca     

EFFECT OF PREGNANCY ANAEMIA ON CELLULAR GROWTH IN THE HUMAN PLACENTA

Abstract. The effects of pregnancy anaemia on cell number and size in human placentae were investigated. Total organ weight, protein, RNA and DNA contents were determined in 54 fresh placentae from anaemic women (haemoglobin <110 g/l) and another 32 placentae from women without anaemia (haemoglobin 110 g/l). The placental weight was significantly reduced in pregnancy anaemia. The decrease in total placental DNA in anaemic women suggested that the reduced placental weight was due to a decrease in cell number. However, these placentae also showed evidence of compensatory cellular hypertrophy as indicated by increase in both weight per cell and protein per cell.     

THE DIAGNOSIS OF IRON DEFICIENCY BY ERYTHROCYTE PROTOPORPHYRIN AND SERUM FERRITIN ANALYSES

ABSTRACT. Free erythrocyte protoporphyrin (FEP) and serum ferritin have been determined in 57 healthy children and in 25 children with varying degrees of iron deficiency. FEP was found to be inversely correlated to the concentration of hemoglobin (r=-0.80) as well as to serum ferritin (r=-0.64). Elevated FEP was found in children with hemoglobin less than 12.5 g/dl, or serum ferritin less than 8 μg/l. In a group of apparently hematologically normal children between the age of 10–14 years (hemoglobin≥ 12.5 g/dl), a 2-month-trial of iron medication resulted in an increase in hemoglobin and ferritin, and a decrease in FEP, indicating suboptimal supply of iron for hemoglobin synthesis before iron medication. In a patient with iron deficiency (FEP 15.3 μmole/l, hemoglobin 5.2 g/dl), iron therapy was followed by a rapid fall in FEP before any changes in hemoglobin, serum iron transferrin saturation and ferritin could be detected. The rapid fall in FEP during start of treatment in iron deficiency makes FEP a sensitive biochemical parameter on iron homeostasis in iron deficiency anemia.