THE VERTICAL BELTS OF NATURAL VEGETATION PARTITIONING OF THE GUANDI MOUNTAINS BY USING ORDERED PLOT CLUSTERING,SHANXI,NORTH CHINA

ＴＨＥＶＥＲＴＩＣＡＬＢＥＬＴＳＯＦＮＡＴＵＲＡＬＶＥＧＥＴＡＴＩＯＮＰＡＲＴＩＴＩＯＮＩＮＧＯＦＴＨＥＧＵＡＮＤＩＭＯＵＮＴＡＩＮＳＢＹＵＳＩＮＧＯＲＤＥＲＥＤＰＬＯＴＣＬＵＳＴＥＲＩＮＧ,ＳＨＡＮＸＩ,ＮＯＲＴＨＣＨＩＮＡ⒇ＦｅｎｇＺｈａｎｇ１Ｔ...     

P~（53） PROTEIN OVEREXPRESSION IN PREMALIGNANT AND MALIGNANT LESIONS OF ORAL MUCOSA：IMMUNOHISTOCHEMICAL OBSERVATION

Ｐ~（５３）　ＰＲＯＴＥＩＮ　ＯＶＥＲＥＸＰＲＥＳＳＩＯＮ　ＩＮ　ＰＲＥＭＡＬＩＧＮＡＮＴ　ＡＮＤ　ＭＡＬＩＧＮＡＮＴ　ＬＥＳＩＯＮＳ　ＯＦ　ＯＲＡＬ　ＭＵＣＯＳＡ：ＩＭＭＵＮＯＨＩＳＴＯＣＨＥＭＩＣＡＬ　ＯＢＳＥＲＶＡＴＩＯＮＰ~（５３）ＰＲＯＴＥＩ...     

汉坦病毒H8205部分核壳蛋白基因在E.coli中的表达

根据汉坦病毒Ｈ８２０５株ＮＰ基因的序列,设计一对引物,扩增ＮＰ前２９２个氨基酸多肽基因片段,克隆于表达载体ｐＧＥＸ３Ｘ,与载体中２６ｋＤ的谷胱苷肽巯基转移酶（ＧＳＴ）融合表达。ＳＤＳＰＡＧＥ显示表达产物（ＧＳＴＮＰ）主要以包涵体形式存在。Ｗｅｓｔｅｒｎｂｌｏｔｉｎｇ表明此融合蛋白有抗原性。包涵体经分离、洗涤、溶解后,Ｓｅｐｈａｒｏｓｅ６Ｂ层析纯化,用此融合蛋白作抗原,进行ＥＬＩＳＡ法检测临床ＨＦＲＳ病人标本的ＩｇＧ和ＩｇＭ,有很好的特异性和敏感性。有生物活性的汉坦病毒Ｈ８２０５ＮＰ的体外表达成功,为汉坦病毒基因工程抗原的大量制备奠定了基础,也为汉坦病毒的临床检测和流行病学调查提供了一种廉价、安全、可靠的抗原。     

云南东南部姜属一新种

云南东南部姜属一新种夏永梅（中国科学院昆明植物研究所西双版纳热带植物园，云南勐腊６６６３０３）关键词姜属，古林姜，新种ＡＮＥＷＴＡＸＯＮＯＦＺＩＮＧＩＢＥＲＦＲＯＭＴＨＥＳＯＵＴＨＥＡＳＴＯＦＹＵＮＮＡＮ￥ＸＩＡＹｏｎｇ－Ｍｅｉ（Ｘｉｓｈｕａｎｇｂａ...     

林下栽培西洋参的试验研究

林下栽培西洋参的试验研究袁崇文（贵州省植物园,贵阳５５０００４）ＳＴＵＤＹＯＮＥＸＰＥＲＩＭＥＮＴＯＦＡＭＥＲＩＣＡＮＧＩＮＳＥＮＧＣＵＬＴＵＲＥＵＮＤＥＲＴＨＥＦＯＲＥＳＴＬＡＮＤ￥ＹＵＡＮＣｈｏｎｇ一Ｗｅｎ（ＧｕｉｚｈｏｕＢｏｔａｎｉｃＧａｒｄｅ...     

GENUS ANTROPHYUM KAULF.FROM CHINA AND NEIGHBORING REGIONS

ＧＥＮＵＳＡＮＴＲＯＰＨＹＵＭＫＡＵＬＦ．ＦＲＯＭＣＨＩＮＡＡＮＤＮＥＩＧＨＢＯＲＩＮＧＲＥＧＩＯＮＳＸ．Ｃ．ＺＨＡＮＧ（Ｔｈｅｈｅｒｂａｒｉｕｍ（ＰＥ）,ＩｎｓｔｉｔｕｔｅｏｆＢｏｔａｎｙ,ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ,Ｂｅｉ...     

一种简单的分离提取水稻叶片中IAA,ABA和GAs的方法

一种简单的分离提取水稻叶片中ＩＡＡ,ＡＢＡ和ＧＡｓ的方法赵玉锦,王台,童哲（中国科学院植物研究所,１０００４４）ＡＳＩＭＰＬＩＦＩＥＤＭＥＴＨＯＤＦＯＲＥＸＴＲＡＣＴＩＯＮＯＦＥＮＤＯＧＥＮＯＵＳＩＡＡ,ＡＢＡＡＮＤＧＡｓＦＲＯＭＲＩＣＥＬＥＡＶＥ￥...     

THE DEVELOPMENT OF MOLECULAR ECOLOGY FORM MOLECULAR BIOLOGY IS AN EXAMPLE OF CONCEPT CHANGE

ＴＨＥＤＥＶＥＬＯＰＭＥＮＴＯＦＭＯＬＥＣＵＬＡＲＥＣＯＬＯＧＹＦＯＲＭＭＯＬＥＣＵＬＡＲＢＩＯＬＯＧＹＩＳＡＮＥＸＡＭＰＬＥＯＦＣＯＮＣＥＰＴＣＨＡＮＧＥＸｉａｎｇＪＭ,ＬｉｎＹＬ,ＬｉｕＸＦ,ＬｉＨＶＩＲＵＳＲＥＳＥＡＲＣＨＩＮＳＴＩＴＵＴＥＡＮ...     

黑线仓鼠生长发育的研究

黑线仓鼠生长发育的研究ＡＳＴＵＤＹＯＮＴＨＥＧＲＯＷＴＨＡＮＤＤＥＶＥＬＯＰＭＥＮＴＯＦＳＴＲＩＰＥＤＨＡＭＳＴＥＲ￥ＹＡＮＧＹｕｐｉｎｇ;ＺＨＯＵＹａｎｌｉｎ;ＺＨＡＮＯＰｅｎｇｌｉ;ＨＯＵＸｉｘｉａｎ;ＤＯＮＧＷｅｉｈｕｉ（Ｉｎｓｔｉｔｕｔｅｏｆ...     

STUDIES ON THE PATTERN OF MEGASPOROGENESIS AND MICROTUBULAR CYTOSKELETON CHANGES IN CYMBIDIUM SINENSE

ＳＴＵＤＩＥＳＯＮＴＨＥＰＡＴＴＥＲＮＯＦＭＥＧＡＳＰＯＲＯＧＥＮＥＳＩＳＡＮＤＭＩＣＲＯＴＵＢＵＬＡＲＣＹＴＯＳＫＥＬＥＴＯＮＣＨＡＮＧＥＳＩＮＣＹＭＢＩＤＩＵＭＳＩＮＥＮＳＥ￥Ｓ．Ｙ．ＺｅｅＸ．Ｌ．Ｙｅ（１ＢｏｔａｎｙＤｅｐａｒｔｍｅｎｔ,Ｕｎｉ...     

脑利钠肽后处理对兔急性心肌梗死的保护作用

目的：脑利钠肽后处理对兔急性心肌梗死的保护作用及可能机制。方法：30 只兔随机分为3 组,每组10 只,左冠状动脉的左 室支缺血30 分钟,再灌注120 分钟。AMI（急性心肌梗死）组：再灌注期间静脉滴注生理盐水;BNP（脑利钠肽）组：再灌注期间静脉 滴注rhBNP(重组人脑利钠肽);BNP+GLY（脑利钠肽+格列苯脲）组：再灌注期间静脉滴注rhBNP,同时舌下静脉注射GLY 。连续 监测心电变化,统计再灌注120 min 室性心动过速(VT)、心室颤动(VF)的发生率。心肌再灌注120 min 后,分别测定SOD(超氧化 物歧化酶)、MDA（丙二醛）、cTnI（肌钙蛋白I）、CK-MB（肌酸激酶同工酶）。各组随机抽取2 只兔,分别于再灌注1 小时和2 小时末 取心尖组织,HE 染色。结果：（1）再灌注心律失常：BNP 组与AMI组比较,VT 和VF发生率均明显升高（均为P<0.01）;BNP+GLY 组与BNP 组比较,VT 和VF 发生率均明显升高（均为P<0.01）。（2）SOD、MDA、cTnI 和CK-MB 水平：BNP 组与AMI 组比较, MDA、cTnI 和CK-MB 均明显降低（均为P<0.01）,而SOD 明显升高（P<0.01）;BNP+GLY 组与BNP 组比较,MDA、cTnI 和 CK-MB 均明显升高（分别为P<0.01,P<0.05和P<0.01）,而SOD明显降低（P<0.01）。（3）心肌HE 染色：AMI组和BNP+GLY 组心 肌损伤明显,BNP 组心肌损伤轻微。结论：脑利钠肽后处理对兔急性心肌梗死（缺血- 再灌注损伤）具有保护作用,可能与KATP 通道相关。     

Biological characterization of human brain natriuretic peptide (BNP) and rat BNP: species-specific actions of BNP

We examined the diuretic-natriuretic activities of rat BNP and human BNP in anesthetized rats in vivo and their vasorelaxant activities for rat thoracic aorta and porcine coronary artery in vitro. Rat BNP was almost equipotent to rat ANP in diuresis and natriuresis with relative potencies of 1.6 and 2.5, respectively, while human BNP exerted no significant activity. Rat ANP, rat BNP and human BNP relaxed PGF2 alpha-contracted rat aortic strips with IC50 values of 0.62, 0.64 and 12.1 nM, respectively, while they relaxed PGF2 alpha-contracted porcine coronary arteries with IC50 values of 0.04, 1.10 and 0.02 nM, respectively. These results strongly suggest that the biological action of BNP is species-specific.     

连续性肾脏替代治疗对难治性心衰患者血清FGF-23和BNP水平及预后的影响

目的:探讨连续性肾脏替代治疗(CRRT)对难治性心力衰竭患者血清FGF-23、BNP水平及预后的影响。方法:选取我院明确为难治性心力衰竭患者60例,随机分为对照组和观察组,每组30例。对照组予以常规治疗,观察组在对照组基础上予以CRRT治疗。观察并比较两组患者治疗前后血清成纤维细胞生长因子23(FGF-23)、血浆脑钠肽(BNP)及一氧化氮(NO)水平,以及左心室收缩末期容积(LVESV)、左室收缩末径(LVESD)、心排血量(CO)及左心射血分数(LVEF)的变化情况。结果:观察组总有效率高于对照组,差异具有统计学意义(P0.05);与治疗前相比,两组患者治疗后血清FGF-23及BNP水平均降低,且观察组低于对照组,差异具有统计学意义(P0.05);与治疗前相比,两组患者治疗后NO水平均升高,且观察组高于对照组,差异具有统计学意义(P0.05);与治疗前相比,两组患者治疗后LVESV及LVESD均降低,且观察组低于对照组,差异具有统计学意义(P0.05);与治疗前相比,两组患者治疗后CO及LVEF均升高,且观察组高于对照组,差异具有统计学意义(P0.05)。结论:连续性肾脏替代治疗(CRRT)可有效提高难治性心力衰竭患者的临床疗效,降低血清FGF-23及BNP水平,预后良好。     

Radioimmunoassay for brain natriuretic peptide (BNP) detection of BNP in canine brain

We established a highly sensitive and specific radioimmunoassay (RIA) for BNP. Our RIA detected BNP-like immunoreactivity (-LI) in the porcine and canine brains but did not detect BNP-LI in the human, monkey or rat brain. The widespread distribution of BNP-LI was demonstrated both in the porcine and canine brains, with the highest concentration in the medulla oblongata. In contrast, the highest concentration of ANP-LI determined simultaneously was in the midbrain and the olfactory bulb. High performance-gel permeation chromatography coupled with RIA revealed that the major component of BNP-LI was eluted at the position of synthetic BNP with a small molecular weight (3K). These results indicate that the RIA for BNP serves as a useful tool to investigate physiological roles of BNP.     

Head-to-head comparison of BNP and IL-6 as markers of clinical and experimental heart failure: Superiority of BNP

Activation of BNP and IL-6 are hallmarks of left ventricular (LV) dysfunction and congestive heart failure (CHF). To assess the relative activation of BNP and IL-6 in clinical and experimental heart failure, we performed a human study in which plasma N-terminal proBNP (NT-proBNP) and IL-6 were measured in a large group of patients in the chronic phase after myocardial infarction (MI) and an animal study in which LV gene expression of BNP and IL-6 was assessed in rapid ventricular pacing-induced heart failure. In the human study, NT-proBNP and IL-6 were measured by non-extracted, enzyme-linked immunoassay in 845 subjects (n=468 outpatients after MI, MONICA MI register Augsburg; and 377 siblings without MI, control). NT-proBNP (295+/-23pg/mL vs. CTRL 84+/-8, P<0.05) and IL-6 (2.7+/-0.1pg/mL vs. CTRL 2.1+/-0.1, P<0.05) were both elevated in subjects with MI. These increases were particularly pronounced in the presence of concomitant CHF (both P<0.01 vs. CTRL) and LV dysfunction (EF<45%, both P<0.05 vs. CTRL). However, NT-proBNP was significantly correlated with several cardiac structural and functional parameters (EF, LVMI, history of MI, CHF symptoms; all P<0.05) upon regression analysis whereas IL-6 was only correlated with history of MI (P<0.001). Accordingly, MI subjects with symptomatic LV dysfunction were detected by NT-proBNP with a greater sensitivity, specificity, and ROC-area (85%, 88%, and 0.87, respectively) as compared to IL-6 (69%, 53%, and 0.67, respectively). In the animal study, IL-6 and BNP expression were both significantly elevated in CHF (both P<0.05) but with a much greater absolute activation of BNP. In addition, BNP mRNA expression displayed a stronger inverse correlation with LV function (r=-0.74; P<0.001) than IL-6 (r=-0.53; P=0.001) and was a markedly more sensitive and specific molecular marker of LV dysfunction (sensitivity 91%, specificity 100%, ROC-area 0.94) than IL-6 (sensitivity 74%, specificity 83%, ROC-area 0.87). Our animal study provides evidence that IL-6 expression is activated in heart failure but to a significantly lesser degree than that of BNP. Both the stronger expression of BNP and the better correlation with LV function provide the molecular basis for a diagnostic superiority of NT-proBNP in clinical LV dysfunction and heart failure.     

大鼠脑内脑钠素mRNA分布的原位杂交

本工作以特异性的放射磷标记的鼠脑钠肽基因片段为探针,利用高灵敏度的原位杂交分析方法,对大鼠脑组织切片中脑钠肽的ｍＲＮＡ分布进行测定。结果表明,大鼠脑中存在脑钠肽基因的表达,其中下丘脑以及丘脑的边缘部分脑肽的ｍＲＮＡ浓度最高,杏仁核簇中浓度较高,嗅区其次,海马回和大脑皮层中浓度较低,小脑和延髓中几乎没有基因表达。     

乙型脑炎患者脑脊液和血浆氨基酸代谢的变化

本文采用气相色谱法对５７例乙型脑炎患者极期和２１例恢复期患者的脑脊液（ＣＳＦ）和血浆１４种游离氨基酸浓度进行分析。结果表明,乙脑极期ＣＳＦ游离氨基酸浓度除苏氨酸、丝氨酸值低于正常值外,其它氨基酸值均增高,其中谷氨酸、鸟氨酸、赖氨酸、缬氨酸、脯氨酸值上升明显（ａｌｌＰ＜０．０１）,至乙脑恢复期不同幅度下降。乙脑极期血浆游离脯氨酸、赖氨酸、苯丙氨酸、酪氨酸、鸟氨酸、谷氨酸浓度高于正常值,而其它８种氨基酸值均下降明显,至乙脑恢复期,多数氨基酸恢复至接近正常水平。实验提示,乙脑病毒能明显影响血浆和ＣＳＦ中氨基酸的含量,而二者具有代谢差异。     

The clearance of BNP modeled using the NT-proBNP-BNP relationship

BACKGROUND: The ventricular myocardium simultaneously secretes two natriuretic peptides useful in the evaluation of heart failure: BNP, hormonally active, and NT-proBNP, the N-terminal end, non-hormonally active, but ultimately their concentrations differ and their clearance patterns are poorly defined. METHODS: We measured NT-proBNP and BNP in patients with and without heart failure and compared their concentrations using regression analysis. RESULTS: The relationship between NT-proBNP with BNP is nonlinear. Between 45 and 70 pmol of BNP/L (class II heart failure) the slope is much higher than in other ranges and the NT-proBNP/BNP ratio reaches its maximum in patients with class II NYHA heart failure. CONCLUSIONS: The difference in concentration for NT-proBNP and BNP can be related to the diffusion across the renal basement membrane. Their ratio is nonlinear because BNP is cleared faster than in patients with class II heart failure than other classes or normal, suggesting a change in a non-renal mode of clearance.     

Biofortification of crops with seven mineral elements often lacking in human diets – iron, zinc, copper, calcium, magnesium, selenium and iodine

The diets of over two-thirds of the world's population lack one or more essential mineral elements. This can be remedied through dietary diversification, mineral supplementation, food fortification, or increasing the concentrations and/or bioavailability of mineral elements in produce (biofortification). This article reviews aspects of soil science, plant physiology and genetics underpinning crop biofortification strategies, as well as agronomic and genetic approaches currently taken to biofortify food crops with the mineral elements most commonly lacking in human diets: iron (Fe), zinc (Zn), copper (Cu), calcium (Ca), magnesium (Mg), iodine (I) and selenium (Se). Two complementary approaches have been successfully adopted to increase the concentrations of bioavailable mineral elements in food crops. First, agronomic approaches optimizing the application of mineral fertilizers and/or improving the solubilization and mobilization of mineral elements in the soil have been implemented. Secondly, crops have been developed with: increased abilities to acquire mineral elements and accumulate them in edible tissues; increased concentrations of 'promoter' substances, such as ascorbate, β-carotene and cysteine-rich polypeptides which stimulate the absorption of essential mineral elements by the gut; and reduced concentrations of 'antinutrients', such as oxalate, polyphenolics or phytate, which interfere with their absorption. These approaches are addressing mineral malnutrition in humans globally.