BACKGROUND & AIMS: :Angiogenesis is a crucial step in many pathologies, including tumor growth and metastasis. Here, we show that tilted peptides exert antiangiogenic activity. Tilted (or oblique-oriented) peptides are short peptides known to destabilize membranes and lipid cores and characterized by an asymmetric distribution of hydrophobic residues along the axis when helical. We have previously shown that 16-kDa fragments of the human prolactin/growth hormone (PRL/GH) family members are potent angiogenesis inhibitors. Here, we demonstrate that all these fragments possess a 14-aa sequence having the characteristics of a tilted peptide. The tilted peptides of human prolactin and human growth hormone induce endothelial cell apoptosis, inhibit endothelial cell proliferation, and inhibit capillary formation both in vitro and in vivo. These antiangiogenic effects are abolished when the peptides' hydrophobicity gradient is altered by mutation. We further demonstrate that the well known tilted peptides of simian immunodeficiency virus gp32 and Alzheimer's beta-amyloid peptide are also angiogenesis inhibitors. Taken together, these results point to a potential new role for tilted peptides in regulating angiogenesis.

背景与目标： ：血管生成是包括肿瘤生长和转移在内的许多病理学中至关重要的一步。在这里，我们表明倾斜的肽发挥抗血管生成活性。倾斜（或倾斜定向）的肽是已知的使膜和脂质核心不稳定的短肽，其特征是当螺旋状时，疏水性残基沿轴不对称分布。我们以前已经表明，人类催乳激素/生长激素（PRL / GH）家族成员的16 kDa片段是有效的血管生成抑制剂。在这里，我们证明所有这些片段均具有具有倾斜肽特征的14-aa序列。人催乳激素和人生长激素的倾斜肽在体外和体内均可诱导内皮细胞凋亡，抑制内皮细胞增殖和抑制毛细血管形成。当肽的疏水性梯度因突变而改变时，这些抗血管生成作用被消除。我们进一步证明了猿猴免疫缺陷病毒gp32和阿尔茨海默氏β-淀粉样蛋白肽的众所周知的倾斜肽也是血管生成抑制剂。综上所述，这些结果表明倾斜的肽在调节血管生成中具有潜在的新作用。

BACKGROUND & AIMS: :Thyroid hormone (TH) regulates such crucial biological functions as normal growth, development and metabolism of nearly all vertebrate tissues. In skeletal muscle, TH plays a critical role in regulating the function of satellite cells, the bona fide skeletal muscle stem cells. Deiodinases (D2 and D3) have been found to modulate the expression of various TH target genes in satellite cells. Regulation of the expression and activity of the deiodinases constitutes a cell-autonomous, pre-receptor mechanism that controls crucial steps during the various phases of myogenesis. Here, we review the roles of deiodinases in skeletal muscle stem cells, particularly in muscle homeostasis and upon regeneration. We focus on the role of T3 in stem cell functions and in commitment towards lineage progression. We also discuss how deiodinases might be therapeutically exploited to improve satellite-cell-mediated muscle repair in skeletal muscle disorders or injury.

背景与目标： 甲状腺激素（TH）调节着至关重要的生物学功能，例如几乎所有脊椎动物组织的正常生长，发育和代谢。在骨骼肌中，TH在调节卫星细胞（真正的骨骼肌干细胞）的功能中起着至关重要的作用。已经发现脱碘酶（D2和D3）调节卫星细胞中各种TH靶基因的表达。脱碘酶的表达和活性的调节构成了细胞自主的前受体机制，该机制在肌生成的各个阶段中控制关键步骤。在这里，我们回顾了脱碘酶在骨骼肌干细胞中的作用，特别是在肌肉稳态和再生中。我们专注于T3在干细胞功能中的作用以及对谱系进展的承诺。我们还将讨论如何在骨骼肌疾病或损伤中治疗性利用脱碘酶来改善卫星细胞介导的肌肉修复。

BACKGROUND & AIMS: :Histamine H2 antagonists are widely used in treating patients with hematemesis and melena, despite the lack of reliable evidence of benefit from any of the randomized trials, considered separately. Examination of the data from all 27 available randomized trials, in which over 2500 patients were entered, suggests that treatment may reduce the rates of rebleeding, surgery, and death by about 10, 20, and 30 per cent, respectively, although these results were only marginally significant for surgery and death. Any benefit appeared to be confined to patients with bleeding gastric ulcers, but since this subgroup analysis was prompted by preliminary examination of the data in some of the individual trials reviewed here, it should be treated with particular caution. The implications of this overview are that treatment with histamine H2 antagonists appears to be moderately promising, but its effects on important end points, such as death, still need to be assessed reliably. Prevention of "only" about 20 per cent of all deaths could well be worthwhile, for the condition is common, and the treatment widely practicable. To detect such a moderate effect reliably, however, might require the randomization of 10,000 patients (or more), which would be possible only in an extremely simple multicenter collaborative trial.

背景与目标： ：Histamine H2拮抗剂被广泛用于治疗呕血和黑便患者，尽管缺乏可靠的证据表明任何随机试验均不能从中获益。对所有27项随机试验的数据进行了检查，其中输入了2500多例患者，这表明治疗可能分别使再出血，手术和死亡的发生率分别降低10％，20％和30％，尽管这些结果是仅对手术和死亡意义微乎其微。任何益处似乎仅限于胃溃疡出血患者，但由于该亚组分析是由在此综述的一些个体试验中对数据进行初步检查而引起的，因此应格外小心。该概述的含义是，用组胺H2拮抗剂治疗似乎有一定希望，但仍需可靠地评估其对重要终点（例如死亡）的影响。预防“仅”所有死亡人数的20％是很值得的，因为这种情况很普遍，而且这种治疗是广泛可行的。但是，要可靠地检测这种中等效果，可能需要将10,000名患者（或更多名患者）随机分组，这只有在极其简单的多中心协作试验中才有可能。

BACKGROUND & AIMS: :In human cerebral cortex slices noradrenaline, isoproterenol (a beta-adrenergic agonist), dopamine, apomorphine (a dopaminergic agonist), and serotonin stimulated cyclic AMP formation: noradrenaline greater than or equal to isoproterenol greater than dopamine = apomorphine = serotonin. Clonidine (and alpha-adrenergic agonist) was ineffective in stimulating cyclic AMP formation in temporal cortex slices. The stimulatory effect of noradrenaline and isoproterenol was blocked by propranolol (a beta-adrenergic blocker) but not by phentolamine (an alpha-adrenergic blocker). Pimozide (a selective dopaminergic antagonist) inhibited the increase of cyclic AMP formation induced by dopamine or apomorphine but not that induced by noradrenaline, isoproterenol, or serotonin. Neither propranolol or phentolamine had any effect on dopamine- or serotonin-stimulated cyclic AMP formation. Chlorpromazine blocked the increase of cyclic AMP formation induced by noradrenaline, dopamine or serotonin, while cyproheptadine, a putative central serotonergic antagonist, was ineffective. These observations suggest that there may be at least two monoamine-sensitive adenylate cyclases in human cerebral cortex which have the characteristics of a beta-adrenergic and a dopaminergic receptor, respectively, and also possibly a serotonergic receptor.

背景与目标： 在人大脑皮层切片中，去甲肾上腺素，异丙肾上腺素（β-肾上腺素能激动剂），多巴胺，阿扑吗啡（多巴胺能激动剂）和5-羟色胺刺激的环状AMP形成：去甲肾上腺素大于或等于异丙肾上腺素大于多巴胺=阿扑吗啡= 5-羟色胺。可乐定（和α-肾上腺素激动剂）在刺激颞叶皮质切片中的环状AMP形成方面无效。去甲肾上腺素和异丙肾上腺素的刺激作用被普萘洛尔（一种β-肾上腺素受体阻滞剂）阻断，但未被酚妥拉明（一种α-肾上腺素能阻断剂）阻断。 Pimozide（一种选择性的多巴胺能拮抗剂）抑制多巴胺或阿扑吗啡诱导的环状AMP形成的增加，但不抑制去甲肾上腺素，异丙肾上腺素或5-羟色胺诱导的环状AMP形成的增加。普萘洛尔或酚妥拉明均未对多巴胺或5-羟色胺刺激的环状AMP的形成产生任何影响。氯丙嗪阻断了去甲肾上腺素，多巴胺或5-羟色胺诱导的环AMP形成的增加，而环丙庚定（一种假定的中枢5-羟色胺能拮抗剂）无效。这些观察结果表明，人大脑皮层中可能至少存在两种​​单胺敏感的腺苷酸环化酶，它们分别具有β-肾上腺素能和多巴胺能受体的特征，还可能具有血清素能受体的特征。

BACKGROUND & AIMS: PURPOSE:The incidence of poor ovarian response in controlled ovarian stimulation (COH) has been reported in 9-24 % of IVF-ET cycles. Growth hormone augments the effect of gonadotropin on granulosa and theca cells, and plays an essential role in ovarian function, including follicular development, estrogen synthesis and oocyte maturation. The aim of this study was to assess IVF-ET cycle outcome after the addition of growth hormone in antagonist protocol in poor responders. MATERIALS AND METHODS:Eighty-two poor responder patients selected for ART enrolled the study and were randomly divided into two groups. Group I (GH/HMG/GnRHant group, n = 40) received growth hormone/gonadotropin/GnRH antagonist protocol and group II (HMG/GnRHant group, n = 42) received gonadotropin/GnRH antagonist protocol. RESULTS:The number of retrieved oocytes was significantly higher in GH/HMG/GnRHant group than HMG/GnRHant group, 6.10 ± 2.90 vs. 4.80 ± 2.40 (p = 0.035) and the number of obtained embryos was also significantly higher in GH/HMG/GnRHant group than HMG/GnRHant group, 3.7 ± 2.89 as compared to 2.7 ± 1.29 (p = 0.018). There were no significant differences between groups regarding implantation, and chemical and clinical pregnancy rates. CONCLUSION:Our study showed that co-treatment with growth hormone in antagonist protocol in patients with a history of poor response in previous IVF-ET cycles did not increase pregnancy rates.

背景与目标： 目的：在IVF-ET周期的9-24％中，有报道称在受控卵巢刺激（COH）中卵巢反应不良的发生率。生长激素增强了促性腺激素对颗粒和卵泡膜细胞的作用，并且在卵巢功能（包括卵泡发育，雌激素合成和卵母细胞成熟）中起着至关重要的作用。这项研究的目的是评估在不良反应者的拮抗剂方案中添加生长激素后的IVF-ET周期结果。
材料与方法：选择接受抗逆转录病毒治疗的82位反应较差的患者作为研究对象，并将其随机分为两组。第一组（GH / HMG / GnRHant组，n = 40）接受生长激素/促性腺激素/ GnRH拮抗剂方案，而第二组（HMG / GnRHant组，n = 42）接受促性腺激素/ GnRH拮抗剂方案。
结果：GH / HMG / GnRHant组的回收卵母细胞数量显着高于HMG / GnRHant组，分别为6.10±2.90和4.80±2.40（p = 0.035），并且GH / HMG中获得的胚胎数量也明显更高/ GnRHant组比HMG / GnRHant组为3.7±2.89，而2.7±1.29（p = 0.018）。两组之间在植入，化学和临床妊娠率方面无显着差异。
结论：我们的研究表明，在先前的IVF-ET周期中有不良反应史的患者中，在拮抗剂方案中与生长激素共同治疗不会增加妊娠率。

BACKGROUND & AIMS: 1. Selective 5-hydroxytryptamine (5-HT; serotonin) reuptake inhibitors (SSRIs) cause a greater increase in extracellular 5-HT in the forebrain when the somatodendritic 5-HT1A autoreceptor is blocked. Here, we investigated whether blockade of the terminal 5-HT1B autoreceptor influences a selective 5-HT reuptake inhibitor in the same way, and whether there is an additional effect of blocking both the 5-HT1A and 5-HT1B autoreceptors. 2. Extracellular 5-HT was measured in frontal cortex of the anaesthetized rat by use of brain microdialysis. In vivo extracellular recordings of 5-HT neuronal activity in the dorsal raphe nucleus (DRN) were also carried out. 3. The selective 5-HT reuptake inhibitor, paroxetine (0.8 mg kg-1, i.v.), increased extracellular 5-HT about 2 fold in rats pretreated with the 5-HT1A receptor antagonist, WAY100635. When administered alone neither paroxetine (0.8 mg kg-1, i.v.) nor WAY100635 (0.1 mg kg-1, i.v.) altered extracellular 5-HT levels. 4. Paroxetine (0.8 mg kg-1, i.v.) did not increase 5-HT in rats pretreated with the 5-HT1B/D receptor antagonist, GR127935 (1 mg kg-1, i.v.). GR127935 (1 and 5 mg kg-1, i.v.) had no effect on extracellular 5-HT when administered alone. 5. Interestingly, paroxetine (0.8 mg kg-1, i.v.) caused the greatest increase in 5-HT (up to 5 fold) when GR127935 (1 or 5 mg kg-1, i.v.) was administered in combination with WAY100635 (0.1 mg kg-1, i.v.). Administration of GR127935 (5 mg kg-1, i.v.) plus WAY100635 (0.1 mg kg-1, i.v.) without paroxetine, had no effect on extracellular 5-HT in the frontal cortex. 6. Despite the lack of effect of GR127935 on 5-HT under basal conditions, when 5-HT output was elevated about 3 fold (by adding 1 microM paroxetine to the perfusion medium), the drug caused a dose-related (1 and 5 mg kg-1, i.v.) increase in 5-HT. 7. By itself, GR127935 slightly but significantly decreased 5-HT cell firing in the DRN at higher doses (2.0-5.0 mg kg-1, i.v.), but did not prevent the inhibition of 5-HT cell firing induced by paroxetine. 8. In summary, our results suggest that selective 5-HT reuptake inhibitors may cause a large increase in 5-HT in the frontal cortex when 5-HT autoreceptors on both the somatodendrites (5-HT1A) and nerve terminals (5-HT1B) are blocked. This increase is greater than when either set of autoreceptors are blocked separately. The failure of a 5-HT1B receptor antagonist alone to enhance the effect of the selective 5-HT reuptake inhibitor in our experiments may be related to a lack of tone on the terminal 5-HT1B autoreceptor due to a continued inhibition of 5-HT cell firing. These results are discussed in relation to the use of 5-HT autoreceptor antagonists to augment the antidepressant effect of selective 5-HT reuptake inhibitors.

背景与目标： 1.当抑制体树突状5-HT1A自体受体时，选择性5-羟色胺（5-HT； 5-羟色胺）再摄取抑制剂（SSRIs）导致前脑细胞外5-HT的增加。在这里，我们调查了终端5-HT1B自身受体的阻断作用是否以相同的方式影响选择性5-HT再摄取抑制剂，以及是否存在阻断5-HT1A和5-HT1B自身受体的其他作用。 2.通过使用脑微透析在麻醉的大鼠的额皮质中测量细胞外5-HT。还进行了背缝核（DRN）中5-HT神经元活性的体内细胞外记录。 3.选择性5-HT再摄取抑制剂帕罗西汀（0.8mg kg-1，静脉内）在用5-HT1A受体拮抗剂WAY100635预处理的大鼠中使细胞外5-HT增加约2倍。当单独给药时，帕罗西汀（0.8 mg kg-1，i.v.）和WAY100635（0.1 mg kg-1，i.v.）均未改变细胞外5-HT水平。 4.在用5-HT1B / D受体拮抗剂GR127935（1 mg kg-1，i.v.）预处理的大鼠中，帕罗西汀（0.8 mg kg-1，i.v.）不会增加5-HT。单独给药时，GR127935（1和5 mg kg-1，静脉内）对细胞外5-HT无效。 5.有趣的是，当GR127935（1或5 mg kg-1，iv）与WAY100635（0.1 mg）联合使用时，帕罗西汀（0.8 mg kg-1，iv）引起5-HT的最大增加（最多5倍）。千克-1，iv）。不含帕罗西汀的GR127935（5 mg kg-1，i.v.）加上WAY100635（0.1 mg kg-1，i.v.）的给药对额皮质中的细胞外5-HT没有影响。 6.尽管在基本条件下GR127935对5-HT缺乏影响，但当5-HT产量提高了约3倍时（通过向灌注培养基中添加1 microM帕罗西汀），该药物引起了剂量相关（1和5 mg kg-1，iv）5-HT升高。 7.就其本身而言，GR127935在较高剂量（2.0-5.0 mg kg-1，i.v.）的DRN中略微但显着降低了5-HT细胞的发射，但并未阻止帕罗西汀诱导的5-HT细胞发射的抑制。 8.总而言之，我们的研究结果表明，当在肢体树突（5-HT1A）和神经末梢（5-HT1B）上都存在5-HT自身受体时，选择性5-HT再摄取抑制剂可能会导致额叶皮层5-HT大量增加。被阻止。该增加量大于分别封闭任一组自动受体时的增加量。在我们的实验中，单独使用5-HT1B受体拮抗剂未能增强选择性5-HT再摄取抑制剂的作用可能与由于持续抑制5-HT细胞而导致末端5-HT1B自体受体缺乏音调有关射击。这些结果与使用5-HT自身受体拮抗剂增强选择性5-HT再摄取抑制剂的抗抑郁作用有关。

BACKGROUND & AIMS: This article describes the use and prescribing of menopausal and postmenopausal hormone therapy (HT) in one example country, Finland, and the trends and levels of HT use in other western countries for comparison. Previously published studies were reviewed and reanalyzed, and some additional unpublished data from Finnish surveys were compiled. The use of HT increased in Finland up to 1994. In Finland the initiative for HT use came more often from physicians than women themselves, physicians valued HT more than women, women's period of use of HT was shorter than physicians' recommendations, women's reasons for using HT were usually to treat symptoms, but physicians considered HT also useful in the prevention of later diseases. Gynecologists were more favorable toward HT than other physicians. HT has become common in very different times in different countries, but with the exception of the US experience in the 1970s, the trend has been towards increasing use. One motivation to do surveys on physicians' prescribing or women's use of HT has been to facilitate HT use. The large variation in HT use may reflect the uncertainty concerning its true value. The reasons for the large-scale prevention with HT have not been systematically studied, but it is likely due to various social and commercial forces.

背景与目标： 本文介绍了一个示例国家芬兰的绝经和绝经后激素治疗（HT）的使用和处方，并比较了其他西方国家使用HT的趋势和水平，以进行比较。审查并重新分析了以前发表的研究，并汇编了芬兰调查中的一些其他未发表的数据。直到1994年，芬兰对HT的使用有所增加。在芬兰，使用HT的倡议更多地是来自医生而不是女性本身，医生对HT的重视程度高于女性，女性使用HT的时间短于医师的建议，这是妇女的原因。通常使用HT来治疗症状，但医生认为HT还可用于预防以后的疾病。妇科医生比其他医生更倾向于HT。 HT在不同国家的不同时代已经很普遍，但是除了美国在1970年代的经验外，趋势是越来越多地使用它。对医生的处方或女性使用HT进行调查的动机之一是促进HT的使用。 HT使用量的巨大差异可能反映了其真实价值的不确定性。大规模预防HT的原因尚未得到系统的研究，但这可能是由于各种社会和商业力量造成的。

BACKGROUND & AIMS: :Based on the previously reported clinical candidate, AMG 517 (compound 1), a series of related piperazinylpyrimidine analogues were synthesized and evaluated as antagonists of the vanilloid 1 receptor (VR1 or TRPV1). Optimization of in vitro potency and physicochemical and pharmacokinetic properties led to the discovery of (R)-N-(4-(6-(4-(1-(4-fluorophenyl)ethyl)piperazin-1-yl)pyrimidin-4-yloxy)benzo[d]thiazol-2-yl)acetamide (16p), a potent TRPV1 antagonist [rTRPV1(CAP) IC50 = 3.7 nM] with excellent aqueous solubility (>or=200 microg/mL in 0.01 N HCl) and a reduced half-life (rat t1/2 = 3.8 h, dog t1/2 = 2.7 h, monkey t1/2 = 3.2 h) as compared to AMG 517. In addition, compound 16p was shown to be efficacious at blocking a TRPV1-mediated physiological response in vivo (ED50 = 1.9 mg/kg, p.o. in the capsaicin-induced flinch model in rats) and was also effective at reducing thermal hyperalgesia induced by complete Freund's adjuvant in rats (MED = 1 mg/kg, p.o). Based on its improved overall profile, compound 16p (AMG 628) was selected as a second-generation candidate for further evaluation in human clinical trials as a potential new treatment for chronic pain.

背景与目标： ：基于先前报道的临床候选药物AMG 517（化合物1），合成了一系列相关的哌嗪基嘧啶类似物，并将其评估为香草素1受体（VR1或TRPV1）的拮抗剂。体外效能，理化和药代动力学特性的优化导致发现（R）-N-（4-（6-（4-（4-（1-（4-（1-（4-氟苯基）乙基））哌嗪-1-基）嘧啶-4-烷氧基）苯并[d]噻唑-2-基）乙酰胺（16p），有效的TRPV1拮抗剂[rTRPV1（CAP）IC50 = 3.7 nM]，具有优异的水溶性（在0.01 N HCl中≥200 microg / mL）和与AMG 517相比，降低了半衰期（大鼠t1 / 2 = 3.8小时，狗t1 / 2 = 2.7小时，猴子t1 / 2 = 3.2小时）。此外，化合物16p在阻断TRPV1-介导的体内生理反应（ED50 = 1.9 mg / kg，在辣椒素诱导的雀斑模型中的大鼠口服），并且在减轻大鼠完全弗氏佐剂诱导的热痛觉过敏中也有效（MED = 1 mg / kg，口服）。基于其改善的总体特性，化合物16p（AMG 628）被选为第二代候选药物，可在人类临床试验中进一步评估，作为潜在的治疗慢性疼痛的新方法。

BACKGROUND & AIMS: :The level of cyclic AMP in various fractions of rat skeletal tissue was measured after in vitro or in vivo administration of parathyroid hormone and calcitonin. Incubations of bone fractions prepared from young (5 weeks of age thyroparathyroidectomized rats revealed that both parathyroid hormone and calcitonin increased the cyclic AMP level in fractions of epiphysis, metaphysis and marrow cells. Cyclic AMP accumulation in incubated perisoteum and diaphysis were induced solely by parathyroid hormone. In in vivo experiments the cyclic AMP level in the tibia of the thyroparathyroidectomized rat was increased by infusion of either parathyroid hormone or calcitonin, and the simultaneous administration of each maximally effective dose of the two hormones exhibited an additive effect. Within 2 min, parathyroid hormone infusion caused an elevation of cyclic AMP content in periosteum and metaphysis. Rapid increase of cyclic AMP in the metaphysis was also induced by calcitonin, and the effect of the two hormones on cyclic AMP accumulation in this fraction was additive. Small but significant increase of cyclic AMP in the diaphysis was detected at 5 min after the administration of parathyroid hormone. Calcitonin infusion did not show any consistent effects on periosteum and diaphysis.

背景与目标： ：在体外或体内给予甲状旁腺激素和降钙素后，测量大鼠骨骼组织各部分中环AMP的水平。从年轻（5周龄甲状腺副甲状腺切除的大鼠）制备的骨级分的培养表明，甲状旁腺激素和降钙素均会增加骨epi，干physi端和骨髓细胞部分中的环AMP含量。孵育的骨膜和骨干中的循环AMP积累仅由甲状旁腺激素诱导在体内实验中，通过注射甲状旁腺激素或降钙素可增加甲状旁腺切除大鼠的胫骨中的环AMP含量，同时最大剂量的两种激素同时给药显示出加和作用，在2分钟内，甲状旁腺激素注入引起骨膜和干meta端的环AMP含量升高，降钙素还引起干physi端的环AMP迅速增加，这两种激素对该部分中环AMP的积累具有累加作用。在5 min时检测到骨干中的环状AMP服用甲状旁腺激素后。降钙素输注对骨膜和骨干没有显示出任何一致的影响。

BACKGROUND & AIMS: PURPOSE:Steroid sulfatase (STS) inhibitors that can decrease or prevent the biosynthesis of estrogenic steroids via the sulfatase route may play an important role in the treatment of breast cancer. We compare the in vivo efficacy of two potent STS inhibitors, STX64 and STX213, in a xenograft breast cancer model. EXPERIMENTAL DESIGN:MCF-7 cells stably expressing STS cDNA (MCF-7STS) were generated. Ovariectomized MF-1 female nude mice receiving s.c. injections of estradiol sulfate (E2S) and bearing both MCF-7STS and wild-type MCF-7 (MCF-7WT) tumors were orally treated with STX64 and STX213. Treatment was given for 49 days followed by a recovery period of 35 days in which animals received only E2S. Mice were weighed, and tumor measurements were taken weekly. RESULTS:STX64 and STX213 exhibited potent STS inhibition in vivo. However, STX213 showed a greater duration of activity. In vehicle-treated nude mice receiving E2S, tumor volumes increased 5.5-fold for MCF-7WT and 3.8-fold for MCF-7STS after 49 days compared with day 0. MCF-7WT tumor growth was reduced by 56% by STX213 over the dosing period, and subsequent growth was retarded during the recovery period. All treatments fully inhibited growth of MCF-7STS tumors, and recovery of these tumors was significantly retarded (P<0.01). All compounds completely inhibited liver and tumor STS activity. Additionally, STS mRNA expression in the MCF-7STS tumors directly correlated with the corresponding STS enzyme activity. CONCLUSIONS:This study indicates that STS inhibitors attenuate hormone-dependent human breast cancer growth and therefore offer a potentially novel treatment for this condition.

背景与目标： 用途：类固醇硫酸酯酶（STS）抑制剂可通过硫酸酯酶途径减少或阻止雌激素类固醇的生物合成，可能在乳腺癌的治疗中起重要作用。我们比较了两种有效的STS抑制剂STX64和STX213在异种移植乳腺癌模型中的体内疗效。
实验设计：产生稳定表达STS cDNA（MCF-7STS）的MCF-7细胞。接受皮下切除的卵巢切除的MF-1雌性裸鼠注射雌二醇硫酸盐（E2S）并同时携带MCF-7STS和野生型MCF-7（MCF-7WT）肿瘤的患者，应使用STX64和STX213口服治疗。给予49天的治疗，然后恢复35天，其中动物仅接受E2S。称重小鼠，每周进行一次肿瘤测量。
结果：STX64和STX213在体内表现出有效的STS抑制作用。但是，STX213显示了更长的活动时间。在接受E2S的媒介物治疗的裸鼠中，与第0天相比，在49天后，MCF-7WT的肿瘤体积增加了5.5倍，MCF-7STS的肿瘤体积增加了3.8倍。STX213使MCF-7WT的肿瘤生长比给药减少了56％期间，随后的生长在恢复期受到阻碍。所有治疗均完全抑制MCF-7STS肿瘤的生长，并且这些肿瘤的恢复显着受阻（P <0.01）。所有化合物均完全抑制肝脏和肿瘤STS活性。此外，MCF-7STS肿瘤中的STS mRNA表达与相应的STS酶活性直接相关。
结论：这项研究表明，STS抑制剂可减弱激素依赖性人类乳腺癌的生长，因此可为这种情况提供潜在的新颖治疗方法。

BACKGROUND & AIMS: :The serum concentrations of a specific GH-binding protein, derived from the GH receptor, were assayed in sera from 62 African pygmies and 101 normal statured controls. Samples were assayed in the absence and presence of excess GH using 2 separatory procedures. Interassay variability for samples was corrected by a standard reference pool of sera from adults assayed with all unknown samples. Results were expressed as specific binding relative to this standard. The mean percent relative specific binding for GH increased with age in normal-statured controls throughout childhood and adolescence. Relative specific binding for GH was 37.0 +/- 2.0% (mean +/- SEM) in control subjects between the ages of 1-5 yr (mean age, 2.9 yr) and increased progressively to 93.0 +/- 7.0% in young adults (mean age, 23 yr). The relative specific binding of GH by serum from pygmies did not exceed 30.1 +/- 3.4% of the control adult standard at any age period (P less than 0.001), and there was no progressive age-related increase in binding. The decrease from normal binding was minimal in pygmies during childhood (29%), but the decrease from normal was 60-70% in adolescents and adults. Thus, short stature in pygmies probably results not from an absolute deficiency of GH receptors per se, as in Laron dwarfism, but from a failure of cellular GH receptors to increase in a normal manner. This is most compatible with a change in regulating expression of the GH receptor gene, rather than a structural defect in the coding sequence of the GH receptor gene.

背景与目标： ：在来自62个非洲py鼠和101个正常对照的血清中测定了从GH受体衍生的特定GH结合蛋白的血清浓度。使用2种分离方法在不存在和存在过量GH的情况下分析样品。通过使用所有未知样品进行分析的成人血清标准参比库对样品的测定间变异性进行了校正。结果表示为相对于该标准的特异性结合。在整个童年和青春期，正常控制的对照组中GH的平均相对特异性结合百分比随年龄增加而增加。在1-5岁（平均年龄为2.9岁）之间的对照受试者中，GH的相对特异性结合为37.0 /-2.0％（平均水平/-SEM），而在年轻人（平均年龄）中逐渐增加至93.0 /-7.0％ ，23年）。侏儒血清中GH的相对特异性结合在任何年龄段均不超过对照成人标准的30.1 /-3.4％（P小于0.001），并且与年龄相关的结合没有进行性增加。在侏儒时期，正常binding缩的减少极少（29％），但在青少年和成人中，normal缩比正常的减少为60-70％。因此，侏儒矮小可能不是由于GH受体本身的绝对缺乏（如Laron侏儒症），而是由于细胞GH受体不能以正常方式增加。这与调节GH受体基因表达的变化最相容，而不是与GH受体基因编码序列的结构缺陷最相容。

BACKGROUND & AIMS: BACKGROUND:The majority of patients receive HT after biochemical progression despite primary therapy of prostate cancer with curative intent. It is difficult to differentiate at a low rise in PSA level, e.g.,

BACKGROUND & AIMS: -2

背景与目标： -2

BACKGROUND & AIMS: :By interrupting the integrity of the systemic and renal renin-angiotensin system, angiotensin-converting enzyme inhibitors have been shown, experimentally, to preferentially reduce postglomerular capillary arteriolar resistance, to reduce glomerular capillary pressure, and to increase the ultrafiltration coefficient. Under normal physiological conditions, angiotensin-converting enzyme inhibitors have little effect on glomerular filtration rate; however, they increase effective renal plasma flow at renal perfusion pressures within the normal autoregulatory range and renal vascular resistance is decreased. In contrast, calcium antagonists have been shown, experimentally, to preferentially reduce preglomerular capillary arteriolar resistance. Their effects on angiotensin II and postglomerular capillary arteriolar resistance (hence, glomerular capillary pressure and the ultrafiltration coefficient) are controversial. Under normal physiological conditions, calcium antagonists increase both glomerular filtration rate and effective renal plasma flow at renal perfusion pressures within the normal autoregulatory range and renal vascular resistance is decreased. In patients with essential hypertension, studies have demonstrated that angiotensin-converting enzyme inhibitors (as predicted) sustain glomerular filtration rate, increase effective renal plasma flow, and decrease renal vascular resistance. However, essential hypertensive patients with impaired glomerular filtration rate may demonstrate marked improvement in both glomerular filtration rate and effective renal plasma flow. Calcium antagonists (as predicted) may increase both glomerular filtration rate and effective renal plasma flow (at high renal perfusion pressures) and may decrease renal vascular resistance. Calcium antagonists may also improve both glomerular filtration rate and effective renal plasma flow in patients with impaired glomerular filtration rate. Long-term clinical trials comparing the renal effects of angiotensin-converting enzyme inhibitors with those of calcium antagonists in essential hypertensive patients have not been reported. It remains to be determined if the potentially different effects of these two classes of antihypertensive drugs on the renal microcirculation do or do not translate into different renal protective advantages to patients at risk for the development and/or progression of hypertensive nephrosclerosis.

背景与目标： 通过实验证明，通过破坏全身和肾脏的肾素-血管紧张素系统的完整性，血管紧张素转化酶抑制剂可优先降低肾小球毛细血管小动脉阻力，降低肾小球毛细血管压力，并增加超滤系数。在正常的生理条件下，血管紧张素转化酶抑制剂对肾小球滤过率的影响很小。但是，它们在正常自我调节范围内的肾脏灌注压力下会增加有效的肾脏血浆流量，并且肾血管阻力降低。相反，实验表明，钙拮抗剂可优先降低肾小球前毛细血管的阻力。它们对血管紧张素II和肾小球后毛细血管小动脉阻力（因此，肾小球毛细血管压力和超滤系数）的影响是有争议的。在正常生理条件下，钙拮抗剂在正常自动调节范围内的肾脏灌注压力下会增加肾小球滤过率和有效肾血浆流量，并且肾血管阻力降低。在原发性高血压患者中，研究表明，血管紧张素转化酶抑制剂（如预期的那样）可维持肾小球滤过率，增加有效肾血浆流量并降低肾血管阻力。然而，肾小球滤过率受损的原发性高血压患者可能表现出肾小球滤过率和有效肾血浆流量的明显改善。钙拮抗剂（如预期的那样）可能会增加肾小球滤过率和有效的肾血浆流量（在高肾灌注压力下），并且可能会降低肾血管阻力。对于肾小球滤过率受损的患者，钙拮抗剂还可以改善肾小球滤过率和有效的肾血浆流量。尚未有长期临床试验比较血管紧张素转化酶抑制剂与钙拮抗剂在基本高血压患者中的肾脏作用。这两类降压药对肾脏微循环的潜在不同作用是否会转化为对患有高血压肾硬化发展和/或进展风险的患者的不同肾脏保护优势，尚待确定。

BACKGROUND & AIMS: :Some peptide hormones are associated with specific, high-affinity plasma proteins. The major binding protein (BP) for growth hormone (GH) in humans is a circulating fragment of the GH membrane receptor, consisting of the hydrophilic, extracellular portion of that transmembrane glycoprotein. The circulating levels of GH-BP mirror the levels of GH receptors. There are 4 well-characterized insulin-like growth factor (IGF)-BPs. One IGF-binding component in plasma is a fragment of the extracellular portion of the IGF-II/mannose-6-phosphate receptor, analogous to the GH-BP. The 3 other cloned IGF-BPs form a homologous family of proteins with differences in structure, glycosylation and hormonal control that suggest differences in function. The GH- and IGF-BPs play a major role in the metabolism and biological action of these peptide hormones.

背景与目标： ：某些肽激素与特定的高亲和力血浆蛋白有关。人类生长激素（GH）的主要结合蛋白（BP）是GH膜受体的循环片段，由该跨膜糖蛋白的亲水性细胞外部分组成。 GH-BP的循环水平反映了GH受体的水平。有4个特征明确的胰岛素样生长因子（IGF）-BP。血浆中的一种IGF结合成分是IGF-II /甘露糖6-磷酸受体的胞外部分的片段，类似于GH-BP。其他3个克隆的IGF-BPs形成同源的蛋白质家族，其结构，糖基化和激素控制方面存在差异，提示其功能存在差异。 GH-和IGF-BP在这些肽激素的代谢和生物学作用中起主要作用。