BACKGROUND & AIMS: :Continuous changes in the length of smooth muscles require a highly organized sarcolemmal structure. Yet, smooth muscle cells also adapt rapidly to altered environmental cues. Their sarcolemmal plasticity must lead to profound changes which affect transmembrane signal transduction as well as contractility. We have established porcine vascular and human visceral smooth muscle cultures of epithelioid and spindle-shaped morphology and determined their plasma membrane properties. Epithelioid cells from both sources contain a higher ratio of cholesterol to glycerophospholipids, and express a less diverse range of lipid-associated annexins. These findings point to a reduction in efficiency of membrane segregation in epithelioid cells. Moreover, compared to spindle-shaped cells, cholesterol is more readily extracted from epithelioid cells with methyl-beta-cyclodextrin and its synthesis is more susceptible to inhibition with lovastatin. The inability of epithelioid cells to process vasoactive metabolites, such as angiotensin or nucleotides further indicates that contractile properties are impaired. Phenotypic plasticity extends beyond the loss of smooth muscle cell marker genes. The plasma membrane has undergone profound functional changes which are incompatible with cyclic foreshortening, but might be important in the development of vascular disease.

背景与目标： ：平滑肌长度的连续变化需要高度组织化的肌膜结构。然而，平滑肌细胞也能迅速适应变化的环境提示。它们的肌膜可塑性必须导致深刻的变化，从而影响跨膜信号转导和收缩。我们已经建立了上皮样和纺锤形形态的猪血管和人内脏平滑肌培养物，并确定了它们的质膜特性。来自两种来源的上皮样细胞都含有较高的胆固醇与甘油磷脂比例，并且表达的脂质相关膜联蛋白的变化范围较小。这些发现表明上皮样细胞中膜分离的效率降低。而且，与纺锤形细胞相比，用甲基-β-环糊精更容易从上皮样细胞中提取胆固醇，并且其合成更容易受到洛伐他汀的抑制。上皮样细胞不能处理血管活性代谢产物，例如血管紧张素或核苷酸，这进一步表明收缩特性受到损害。表型可塑性超出了平滑肌细胞标记基因丧失的范围。质膜已经发生了深刻的功能变化，这与循环缩短不相容，但是在血管疾病的发展中可能很重要。

BACKGROUND & AIMS: :Medial preoptic area (MPOA) and ventral bed nucleus of the stria terminalis (VBST) neurons are involved in maternal behavior, but the neural sites to which the maternally relevant neurons project have not been determined. Since MPOA and VBST neurons express Fos during maternal behavior, we used a double-labeling immunocytochemical procedure to detect both Fos and a retrograde tracer, wheat germ agglutinin (WGA), in order to determine where these Fos neurons project. On Day 4 postpartum, fully maternal females were separated from their litters. On Day 5, WGA was iontophoretically injected into one of the following regions known to receive MPOA and/or VBST input: Lateral septum, medial hypothalamus at the level of the ventromedial nucleus, lateral habenula, ventral tegmental area, retrorubral field, or periaqueductal gray. On Day 7, females received a 2-h test with either pups or candy, after which they were perfused and their brains were processed for the detection of Fos and WGA. As expected, females tested with pups had more Fos-containing neurons in the MPOA and VBST than did females tested with candy. After WGA injections into several brain sites, the number of double-labeled cells observed in the MPOA and VBST was greater for the maternal females when compared to the non-maternal females. Therefore, these results pinpointed neural circuits that were activated during maternal behavior. For the maternal females, Fos-containing neurons in the MPOA projected most strongly to the medial hypothalamus at the level of the ventromedial nucleus and to the lateral septum, while Fos-containing neurons in the VBST projected most strongly to the retrorubral field, ventral tegmental area, and medial hypothalamus. Although relatively few MPOA and VBST neurons which expressed Fos during maternal behavior projected to the periaqueductal gray, these Fos-expressing neurons made up a relatively large proportion of the MPOA and VBST projection to the periaqueductal gray. This study suggests that MPOA and VBST efferents project to a variety of regions to promote full maternal responsiveness.

背景与目标： ：孕产妇的行为涉及视神经内侧视前区（MPOA）和纹状体终末腹侧核（VBST）的母亲行为，但尚未确定与母亲相关的神经元投射到的神经部位。由于MPOA和VBST神经元在孕产妇行为期间表达Fos，因此我们使用双重标记免疫细胞化学方法检测Fos和逆行示踪剂小麦胚芽凝集素（WGA），以确定这些Fos神经元的位置。在产后第4天，将完全产妇的母猪从其产仔中分离出来。在第5天，将WGA离子电渗注入已知可接收MPOA和/或VBST输入的以下区域之一：外侧中隔，腹侧内侧丘脑，腹侧核，腹侧被膜区，腹侧被盖区，后睑缘视野或导水管周围灰色。在第7天，雌性接受幼犬或糖果进行2小时的测试，然后对它们进行灌注，并对其大脑进行处理以检测Fos和WGA。不出所料，用幼犬测试的雌性在MPOA和VBST中的含Fos的神经元要多于用糖果进行测验的雌性。 WGA注射到多个大脑部位后，与非母体雌性相比，母体雌性在MPOA和VBST中观察到的双标记细胞数量更多。因此，这些结果指出了在孕产妇行为中被激活的神经回路。对于孕产妇，MPOA中含有Fos的神经元在腹膜内侧核和外侧中隔的投射力最强，而VBST中含有Fos的神经元在后睑内侧，腹侧被膜的投射力最强。区域和内侧下丘脑。尽管在产妇行为中表达Fos的MPOA和VBST神经元相对较少，但会投射到导水管周围的灰色，但这些表达Fos的神经元在MPOA和VBST投射至导水管周围的灰色中所占的比例相对较大。这项研究表明，MPOA和VBST传出可投射到多个区域，以促进全面的孕产妇反应。

BACKGROUND & AIMS: INTRODUCTION:STDs are a significant cause of illness throughout the world. Female sex workers (FSWs) are commonly perceived as belonging to a social group which may engage in high-risk behaviour for acquiring or transmitting HIV and other STDs. The number of immigrant women engaged in sex work has increased in Catania, Sicily, over the last 10 years. This study aims to estimate the prevalence of HIV, HBV, HCV and syphilis among Colombian and Dominican FSWs. METHODS:In total 118 (63.78%) of the FSWs contacted in the course of the project agreed to participate in the study. All women enrolled were counselled on STDs/HIV, safer sex practices and the use of condoms. Blood samples were taken and tested for HIV, HBV, HCV and syphilis. RESULTS:Of the 118 FSWs enrolled, all were negative for both HIV and HCV infection. Two women (1.6%) were positive for hepatitis B (HbsAg). Syphilis testing by VDRL showed three positive results (2.5%), which was confirmed by TPHA. DISCUSSION:This study showed that HIV, HBV, HCV and syphilis seroprevalence among Colombian and Dominican FSWs remains low or very rare. It also indicates that these women were healthy when they arrived in Italy and that condom use with clients is high.

背景与目标： 简介：性病是世界范围内引起疾病的重要原因。女性性工作者（FSWs）通常被认为属于一个社会群体，该群体可能会为获取或传播艾滋病毒和其他性传播疾病而从事高风险行为。在过去的十年中，西西里岛卡塔尼亚从事性工作的移民妇女人数有所增加。这项研究的目的是估计哥伦比亚和多米尼加的FS​​W中HIV，HBV，HCV和梅毒的患病率。
方法：在该项目过程中，总共有118名（63.78％）的FSW同意参与研究。为所有入选妇女提供性传播疾病/艾滋病毒，更安全的性行为和使用安全套方面的咨询。抽取血样并测试HIV，HBV，HCV和梅毒。
结果：在118个FSW中，所有的HIV和HCV感染均为阴性。两名女性（1.6％）的乙型肝炎（HbsAg）阳性。 VDRL进行的梅毒测试显示三项阳性结果（2.5％），这已被TPHA证实。
讨论：这项研究表明，哥伦比亚和多米尼加地区FSW中的HIV，HBV，HCV和梅毒血清阳性率仍然很低或非常罕见。这也表明，这些妇女抵达意大利后就很健康，而且与客人一起使用避孕套的比例很高。

BACKGROUND & AIMS: Mucin-type glycoproteins carrying sialylLeA antigens (SL-GP) were isolated from the ascites fluid of a patient with colorectal cancer. SL-GP bound to E-selectin on endothelial cells in Ca2+- and sialylLeA antigen-dependent manners. To examine the metabolic change in E-selectin caused by ligation, endothelial cells were labeled with 32P-phosphate or 35S-Met and 35S-Cys. Phosphorylation at one or more serine residues of E-selectin was elevated by ligation with SL-GP but not with sialylLeA hexasaccharide. Pulse-labeling of E-selectin with 35S-Met and 35S-Cys in the presence of SL-GP indicated that the degradation of E-selectin was accelerated by SL-GP ligation, but labeling after pre-ligation with SL-GP revealed an increase in the synthesis of E-selectin. The synthesis may reflect compensation for the E-selectin degraded on pre-ligation. These results indicate that the overall metabolism of E-selectin was enhanced by the ligation of SL-GP, with degradation and synthesis being apparently balanced.

背景与目标： 从患有结肠直肠癌的患者的腹水中分离出带有唾液酸LeA抗原的粘蛋白型糖蛋白（SL-GP）。 SL-GP以Ca2-和sialylLeA抗原依赖性方式与内皮细胞上的E-选择素结合。为了检查由连接引起的E-选择蛋白的代谢变化，用32P-磷酸或35S-Met和35S-Cys标记内皮细胞。通过与SL-GP而非唾液酸LeA六糖连接，可增强E-选择蛋白一个或多个丝氨酸残基的磷酸化作用。在SL-GP存在下用35S-Met和35S-Cys脉冲标记E-选择素表明SL-GP连接可加速E-选择素的降解，但与SL-GP预连接后的标记显示E-选择素的降解E-选择素的合成增加。该合成可以反映对在预连接时降解的E-选择蛋白的补偿。这些结果表明SL-GP的连接增强了E-选择蛋白的整体代谢，降解和合成明显平衡。

BACKGROUND & AIMS: :Wound healing is a complex process resulting from an interplay of processes including coagulation, inflammation, angiogenesis, and epithelialization. The chemokine family has been shown to contain members that are potent regulators of many of these pathways. Because we have previously shown that chemokines "pool" in biologic wound dressings, we studied the levels of CXC and CC chemokines, along with key inflammatory mediators, serially from a group of patients undergoing therapy for chronic venous leg ulcers. After 8 weeks, all patients had marked clinical healing of their ulcers (median 63.3% reduction in size) with two of 10 completely healed. Wound fluids extracted from dressings showed high levels of platelet factor-4 and interferon-gamma-inducible protein, with a trend toward increases in the ratio of the sums of the angiogenic versus angiostatic CXC chemokines (p = 0.082) in the tissues collected from the center of the ulcers during wound closure. Neutrophil-activating peptide-2 and interleukin-8 accounted for the most changes in wound fluid angiogenic chemokines, with significant differences both as compared with baseline levels and with patients' plasma level noted at various time points between weeks 0 and 8. The level of angiostatic chemokines, interferon-y inducible protein 10 and platelet-activating-4, fell most significantly between weeks 0 and 3 as compared with plasma levels. The observed shift toward angiogenic CXC chemokines suggests that effective healing in chronic venous insufficiency ulcers appears to "move" the ulcer bed toward a state more conducive to epithelialization,characteristic of the proliferative phase of wound healing. CC chemokines were also elevated at baseline in the wound fluid samples as compared with the patients' plasma levels. Macrophage inflammatory protein-1 (3 and regulated on activation, normal T expressed and secreted (RANTES) levels decreased with healing, whereas there were significant increases in the tissue levels of monocyte chemoattractant protein-1 and macrophage inflammatory protein-1 a over the first 4 weeks of therapy (p< or = 0.05 for both). Coincident with these changes was a steady increase in the ratio of interleukin-1 R/interleukin-1 receptor antagonist protein in the ulcer center tissues, which also correlated with healing (p < 0 .05) as compared with a decreasing ratio at the ulcer edge, and a biphasic response in the wound fluids. These findings suggest that advanced wound care techniques help move the ulcer from a chronic inflammatory state into one more characteristic of the late inflammatory/early proliferative phase of wound healing. Chemokines may play a critical role in the pathogenesis of chronic venous ulcers through their effects on angiogenesis and/or the progression of inflammatory reactions at the site of injury.

背景与目标： ：伤口愈合是一个复杂的过程，是由凝血，炎症，血管生成和上皮形成等过程相互影响而产生的。趋化因子家族已显示其成员是这些途径中许多的有效调节因子。因为我们先前已经证明趋化因子在生物伤口敷料中“聚集”，所以我们从一组接受慢性静脉腿溃疡治疗的患者中连续研究了CXC和CC趋化因子以及关键的炎症介质的水平。 8周后，所有患者的溃疡均得到了明显的临床治愈（中位数减少了63.3％），其中10例中的2例完全治愈。从敷料中提取的伤口液显示出高水平的血小板因子4和干扰素-γ诱导型蛋白，并且在从组织中收集的组织中，血管生成与血管抑制性CXC趋化因子之和的比例有增加的趋势（p = 0.082）。伤口闭合过程中溃疡的中心。中性粒细胞激活肽2和白细胞介素8引起伤口液中血管生成趋化因子的变化最多，与基线水平相比以及在0至8周的各个时间点记录的患者血浆水平均存在显着差异。与血浆水平相比，血管静息趋化因子，γ-干扰素诱导蛋白10和血小板活化因子4在第0周和第3周之间下降最为明显。观察到的向血管生成性CXC趋化因子的转变表明，慢性静脉功能不全溃疡的有效愈合似乎将溃疡床“移”至更有利于上皮化的状态，这是伤口愈合增殖阶段的特征。与患者血浆水平相比，伤口液样本中的CC趋化因子在基线时也升高。巨噬细胞炎性蛋白-1（3和活化受调节，正常T表达和分泌（RANTES）水平随愈合而降低，而单核细胞趋化蛋白-1和巨噬细胞炎性蛋白1a的组织水平在第一时间显着增加治疗4周（两者均p≤0.05）。溃疡中心组织中白细胞介素1 R /白细胞介素1受体拮抗剂蛋白的比例稳定增加，这与这些变化相关，也与愈合相关（p <0 .05），而溃疡边缘的比率逐渐降低，伤口液出现双相反应，这些发现表明先进的伤口护理技术有助于将溃疡从慢性发炎状态转变为晚期发炎的另一特征/伤口愈合的早期增殖阶段。趋化因子可能通过影响血管生成和/或炎症的发展而在慢性静脉溃疡的发病过程中发挥关键作用受伤部位的反应性反应。

BACKGROUND & AIMS: :The nature of the primary genetic defects in ob/ob and db/db mice are unknown. Both the obese (ob) and diabetes (db) mutations produce similar, multicomponent obese-hyperinsulinemic syndromes when maintained in the same strain of mouse. In an attempt to find differences between these mutations in neuroendocrine function affecting the islets of Langerhans or the pituitary, tissue content of four neuropeptides that are known to be capable of influencing the rate of insulin secretion was examined in obese (ob/ob) and diabetes (db/db) mice. In the first study, C57BL/6Job/ob and control males were studied at 3, 4, and 11 weeks of age. In the second study, db/db mice of both sexes and two inbred strains (C57BL/6J and C57BL/KsJ), which differ markedly in the severity of expression of the diabetes phenotype, were studied at 3 weeks of age, before the development of hyperglycemia and secondary consequences thereof. Immunoreactive peptides were measured in acetic acid extracts of pancreas and pituitary. No differences between male ob/ob and db/db mice of the C57BL/6J strain were found. Marked sex differences in lean control mice were found at 3 weeks of age in pancreatic Met-enkephalin-LI and galanin-LI (with two- to threefold higher content in males). Low pancreatic content (50% to 70% lower than in control mice) of galanin-LI, Met-enkephalin-LI and Leu-enkephalin-LI was associated with hyperinsulinemia in male B6 ob/ob and db/db mice at 3 weeks of age, though not in B6 db/db females and not in BKs db/db mice of either sex.(ABSTRACT TRUNCATED AT 250 WORDS)

背景与目标： ：ob / ob和db / db小鼠的主要遗传缺陷的性质尚不清楚。肥胖（ob）和糖尿病（db）突变在同一小鼠品系中均会产生相似的多成分肥胖-高胰岛素血症综合征。为了发现影响兰格罕氏岛或垂体的胰岛的神经内分泌功能的这些突变之间的差异，在肥胖（ob / ob）和糖尿病患者中检查了四种已知能够影响胰岛素分泌速率的神经肽的组织含量（db / db）小鼠。在第一个研究中，研究了C57BL / 6Job / ob和对照男性在3、4和11周的年龄。在第二项研究中，在发育前的3周龄研究了具有性别和两种近交系（C57BL / 6J和C57BL / KsJ）的db / db小鼠，它们在糖尿病表型的表达严重程度上有显着差异。高血糖及其继发后果。在胰腺和垂体的乙酸提取物中测量了免疫反应性肽。在C57BL / 6J株的雄性ob / ob和db / db小鼠之间未发现差异。在瘦瘦对照小鼠中，在3周龄的胰腺Met-脑啡肽-LI和甘丙肽-LI中发现明显的性别差异（雄性含量高2至3倍）。在3周龄的雄性B6 ob / ob和db / db小鼠中，甘丙肽-LI，Met-脑啡肽-LI和亮-脑啡肽-LI的胰腺含量低（比对照小鼠低50％至70％）与高胰岛素血症相关。年龄，但不是在B6 db / db雌性中，也不是在BK s db / db两种性别的小鼠中。（摘要以250字截断）

BACKGROUND & AIMS: :Submitochondrial particles prepared from rat liver during hepatic regeneration exhibit a depressed ATPase activity which is correlated with a decrease in F1 subunit content as shown by SDS-PAGE. Use of an antibody directed against the F1 portion of the H+-ATPase complex demonstrated that there is a definite decrease in the amount of beta-subunit of F1 in both submitochondrial particles and mitochondria from rat liver 24 h after partial hepatectomy.

背景与目标： 肝再生过程中，从大鼠肝脏制备的线粒体颗粒显示出较低的ATPase活性，这与FDS亚基含量的降低有关，如SDS-PAGE所示。使用针对H -ATPase复合物的F1部分的抗体表明，部分肝切除术后24小时，来自大鼠肝脏的线粒体颗粒和线粒体中F1的β亚基含量明显减少。

BACKGROUND & AIMS: BACKGROUND:Trabecular bone strength diminishes as a result of osteoporosis and altered biomechanical loading at the vertebral and spinal levels. The spine consists of the anterior, middle and posterior columns and the load supported by the anterior and middle columns will differ across different regions of the spine. Stress shielding of the anterior column can contribute to bone loss and increase the risk of wedge fracture. There is a lack of quantitative data related to regional spinal bone mineral density distribution over time. We hypothesize that there is an increase in the posterior-to-anterior vertebral body bone mineral density ratio and a decrease in whole-body bone mineral density over time. METHODS:Bone mineral density was measured in 33 subjects using quantitative computed tomography scans for L1-L3 vertebrae, region (anterior and posterior vertebral body), and time (baseline and 6 years after). FINDINGS:Lumbar bone mineral density decreased significantly (Δ: ~15%) from baseline to the 6th year visit. Individual vertebra differences over time (L1: ~14%, L2: ~14%, L3: ~17%) showed statistical significance. Anterior bone mineral density change was significantly greater than in the posterior vertebral body region (Δ anterior: ~18%; Δ posterior: ~13%). Posterior-to-anterior bone mineral density ratio was significantly greater in the 6th year compared to baseline values (mean (SD), 1.33 (0.2) vs. 1.23 (0.1)). INTERPRETATION:This study provides longitudinal quantitative measurement of bone mineral density in vertebrae as well as regional changes in the anterior and posterior regions. Understanding bone mineral density distribution over time may help to decrease the risk of wedge fractures if interventions can be developed to bring spine loading to its normal state.

背景与目标： 背景：由于骨质疏松症以及椎体和脊柱水平的生物力学负荷改变，小梁的骨强度降低。脊柱由前，中和后柱组成，由前柱和中柱支撑的载荷在脊柱的不同区域会有所不同。前柱的应力屏蔽可能会导致骨质流失并增加楔形骨折的风险。缺乏与区域脊柱骨矿物质密度随时间分布有关的定量数据。我们假设随着时间的推移，椎体前后骨矿物质密度比增加，而全身骨矿物质密度降低。
方法：采用定量计算机断层扫描技术对33名受试者的L1-L3椎骨，区域（椎体的前后）和时间（基线及术后6年）进行了骨矿物质密度测量。
结果：从基线到第6年随访，腰椎骨矿物质密度显着降低（Δ：〜15％）。随时间变化的各个椎骨差异（L1：〜14％，L2：〜14％，L3：〜17％）显示出统计学意义。前骨矿物质密度变化显着大于后椎体区域（Δ前：〜18％；Δ后：〜13％）。与基线值相比，第6年的前后骨矿物质密度比显着更高（平均值（SD）为1.33（0.2）对1.23（0.1））。
解释：这项研究提供了纵向定量测量椎骨中骨矿物质密度以及前后区域的变化的信息。如果可以采取干预措施使脊柱负荷恢复到正常状态，那么了解随着时间推移的骨矿物质密度分布可能有助于降低楔形骨折的风险。

BACKGROUND & AIMS: :In a prospective magnetic resonance imaging and cognitive study of 38 demented patients and 15 control subjects, 11 of 27 patients with Alzheimer's disease and 8 of 11 patients with vascular dementia had significant periventricular hyperintensities. Memory and language testing in the early investigation of dementia is useful to distinguish patients with or without periventricular hyperintensities on magnetic resonance imaging. Patients without periventricular hyperintensities are worse on memory and conceptualization tests than patients with periventricular hyperintensities, who tend to be worse on comprehension and attention tests. These differences in cognitive pattern are present between patients with different pathogenesis who are otherwise matched for dementia severity. Language and some nonverbal cognitive deficits correlate with the extent of cortical and ventricular atrophy in Alzheimer's disease.

背景与目标： ：在一项针对38名痴呆患者和15名对照受试者的前瞻性磁共振成像和认知研究中，27名阿尔茨海默氏病患者中的11名和11名血管性痴呆患者中的8名出现了明显的脑室高信号。痴呆症早期调查中的记忆和语言测试有助于区分磁共振成像中是否伴有脑室高信号的患者。没有脑室高信号的患者在记忆力和概念化测试方面比脑室高信号的患者在理解和注意力测试方面更差。这些认知模式上的差异存在于具有不同发病机制的患者之间，这些患者在其他方面因痴呆症的严重程度而匹配。语言和一些非语言认知缺陷与阿尔茨海默氏病的皮质和心室萎缩程度有关。

BACKGROUND & AIMS: :To our knowledge, the relationship between gallbladder volume and cystic duct function has not been studied. We hypothesized that changes in gallbladder volume would influence cystic duct resistance. The effect of gallbladder volume changes on cystic duct resistance to both prograde (emptying) and retrograde (filling) steady-state flow was tested in 12 dogs under basal cholecystokinin-stimulated conditions utilizing a multiport catheter with a highly compliant balloon placed within the gallbladder fundus. Gallbladder volume was regulated by varying balloon volume from empty to just beyond physiologic distention. Cystic duct resistance was not affected by balloon volume under basal or stimulated conditions or by the direction of perfusate flow. This study demonstrated no relationship between gallbladder volume and cystic duct resistance and did not demonstrate a cystic duct sphincter mechanism at physiologic gallbladder volumes.

背景与目标： ：据我们所知，尚未研究胆囊体积与胆囊管功能之间的关系。我们假设胆囊体积的变化会影响胆囊管阻力。胆囊体积变化对胆囊管抵抗顺行（空）和逆行（充盈）稳态血流的影响在12条经基础胆囊收缩素刺激的狗中使用多端口导管，并在胆囊内放置高度顺应性球囊进行了测试。胆囊体积的调节是通过将气囊体积从空变到生理上的变化来进行的。囊性导管阻力不受基础或刺激条件下的球囊容积或灌注液流动方向的影响。这项研究表明胆囊体积和胆囊管阻力之间没有关系，并且在生理胆囊体积上也没有证明胆囊括约肌的机制。

BACKGROUND & AIMS: :Musical training has emerged as a useful framework for the investigation of training-related plasticity in the human brain. Learning to play an instrument is a highly complex task that involves the interaction of several modalities and higher-order cognitive functions and that results in behavioral, structural, and functional changes on time scales ranging from days to years. While early work focused on comparison of musical experts and novices, more recently an increasing number of controlled training studies provide clear experimental evidence for training effects. Here, we review research investigating brain plasticity induced by musical training, highlight common patterns and possible underlying mechanisms of such plasticity, and integrate these studies with findings and models for mechanisms of plasticity in other domains.

背景与目标： ：音乐训练已成为研究人脑与训练有关的可塑性的有用框架。学习演奏乐器是一项高度复杂的任务，涉及多种模式和高阶认知功能的相互作用，并导致行为，结构和功能发生变化，时间范围从数天到数年不等。早期的工作着重于音乐专家和新手之间的比较，而最近，越来越多的受控训练研究为训练效果提供了明确的实验证据。在这里，我们回顾研究由音乐训练引起的大脑可塑性的研究，突出显示这种可塑性的常见模式和可能的潜在机制，并将这些研究与其他领域的可塑性机制的发现和模型相结合。

BACKGROUND & AIMS: OBJECTIVES:This study assessed social and behavioural predictors for sexual risk taking and sexually transmitted infections (STIs) including HIV among adolescent female sex workers (FSWs) from Kunming, China. Additionally, health services needs and use were assessed. METHODS:A cross-sectional survey was conducted in 2010. Using snowball and convenience sampling, self-identified FSWs were recruited from four urban areas in Kunming. Women consenting to participate were administered a semi-structured questionnaire by trained interviewers identified from local peer-support organisations. Following interview, a gynaecological examination and biological sampling to identify potential STIs were undertaken. Descriptive and multivariable logistic regression analyses were performed. RESULTS:Adolescent FSWs had a mean age of 18.2 years and reported numerous non-paying sexual partners with very low rate of consistent condom use (22.2%). Half (50.3%) the respondents had sex while feeling drunk at least once in the past week, of whom 56.4% did not use condom protection. STI prevalence was high overall (30.4%) among this group. Younger age, early sexual debut, being isolated from schools and family, short duration in sex work, and use of illicit drugs were found to be strong predictors for unprotected sex and presence of an STI. Conversely, having access to condom promotion, free HIV counselling and testing, and peer education were associated with less unprotected sex. The majority reported a need for health knowledge, free condoms and low-cost STI diagnosis and treatment. CONCLUSIONS:There is an urgent need to improve coverage, accessibility and efficiency of existing interventions targeting adolescent FSWs.

背景与目标： 目的：本研究评估了来自中国昆明市的青春期女性性工作者（FSW）的性行为冒险和性传播感染（STI）（包括HIV）的社会和行为预测因素。此外，还评估了卫生服务的需求和使用。
方法：2010年进行了横断面调查。通过滚雪球和便利抽样，从昆明的四个市区招募了自我识别的FSW。从当地同支持组织确定的训练有素的访调员对同意参加的妇女进行半结构化问卷调查。采访之后，进行了妇科检查和生物采样以识别潜在的性传播感染。进行了描述性和多变量logistic回归分析。
结果：青少年FSW的平均年龄为18.2岁，并报告了许多无偿性伴侣，一致使用避孕套的比例很低（22.2％）。在过去的一周中，有一半（50.3％）的被调查者曾发生过至少一次醉酒的性行为，其中56.4％的人未使用安全套保护措施。在这一组中，性传播感染的患病率总体较高（30.4％）。人们发现，年龄较小，性行为初次出现，与学校和家庭隔离，性工作时间短以及使用非法药物是无保护性行为和性传播感染存在的强烈预测因素。相反，获得安全套宣传，免费的艾滋病毒咨询和检测以及同伴教育的机会与较少受到保护的性行为有关。大多数人报告需要健康知识，免费避孕套和低成本的STI诊断和治疗。
结论：迫切需要提高针对青少年FSW的现有干预措施的覆盖面，可及性和效率。

BACKGROUND & AIMS: :In this study, several electrocardiogram (ECG)-derived indices corresponding to both ventricular depolarization and repolarization were evaluated during acute myocardial ischemia in an experimental model of myocardial infarction produced by 40 min coronary balloon inflation in 13 pigs. Significant changes were rapidly observed from minute 4 after the start of coronary occlusion, achieving their maximum values between 11 and 22 min for depolarization and between 9 and 12 min for repolarization indices, respectively. Subsequently, these maximum changes started to decrease during the latter part of the occlusion. Depolarization changes associated with the second half of the QRS complex showed a significant but inverse correlation with the myocardium at risk (MaR) estimated by scintigraphic images. The correlation between MaR and changes of the downward slope of the QRS complex, [Formula: see text], evaluated at the two more relevant peaks observed during the occlusion, was r = -0.75, p < 0.01 and r = -0.79, p < 0.01 for the positive and negative deflections observed in [Formula: see text], temporal evolution, respectively. Repolarization changes, analyzed by evaluation of ST segment elevation at the main observed positive peak, also showed negative, however non-significant correlation with MaR: r = -0.34, p = 0.28. Our results suggest that changes evaluated in the latter part of the depolarization, such as those described by [Formula: see text], which are influenced by R-wave amplitude, QRS width and ST level variations simultaneously, correlate better with the amount of ischemia than other indices evaluated in the earlier part of depolarization or during the ST segment.

背景与目标： ：在这项研究中，在急性心肌缺血期间，在13只猪的40分钟冠状动脉球囊扩张产生的心肌梗塞实验模型中，评估了与心室去极化和复极化同时对应的几个心电图（ECG）衍生指标。从开始进行冠状动脉闭塞后的第4分钟开始迅速观察到显着变化，分别在去极化的11至22分钟和重新极化的9至12分钟之间达到最大值。随后，在咬合的后期，这些最大变化开始减少。与QRS波复杂度的后半部分相关的去极化变化与闪烁显像图像估计的危险心肌（MaR）呈显着但呈负相关。在咬合期间观察到的两个更相关的峰处评估的MaR与QRS络合物的向下斜率变化之间的相关性为[r = -0.75，p <0.01和r = -0.79，p分别在[公式：参见文本]，时间演变中观察到的正挠度和负挠度<0.01。通过在主要观察到的正峰值处评估ST段抬高来分析的复极变化也显示为负，但与MaR的相关性不显着：r = -0.34，p = 0.28。我们的结果表明，在去极化后期评估的变化（如[公式：请参见文本]所述）受R波幅度，QRS宽度和ST水平变化的同时影响，与缺血量的相关性更好。比在去极化早期或ST段评估的其他指数要高。

BACKGROUND & AIMS: :

Background: Despite public education efforts, many people at risk for skin cancer do not practice safe sun behaviors.

Objective: To determine whether machine-based evaluation of UV-induced alterations (VISIA scan) changes self-assessment of facial photoaging, skin cancer risk, and willingness to improve sun protective habits. In addition, to determine whether VISIA scan analysis reveals differences between those with versus without a history of skin cancer, men versus women, those older than 50 versus less than 50 years of age, and Fitzpatrick skin types I-III versus IV-VI.

Methods: Volunteers attending a health expo were recruited and queried about their perceived risk of skin cancer and degree of skin photoaging. All participants underwent facial skin quality analysis of both sides of the face, and then completed a follow-up survey.

Results: Participants' scored self-perceptions of overall skin aging were all statistically significantly worse after VISIA scan analysis. There was no change in perceived skin cancer risk, but most participants expressed intent to improve their sun protection habits.

Limitations: Limitations to this study include selection bias, recall-misclassification bias, and social desirability bias.

Conclusion: Intervention with facial skin analysis can positively affect subjects' stated intent to use sun protection, indicating the importance of appearance in these health decisions.

J Drugs Dermatol. 2017;16(5):453-459.

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背景与目标： ：

背景：尽管进行了公众教育，但许多有皮肤癌风险的人仍未进行安全的日晒行为。

目的：确定是否对紫外线诱发的变化进行基于机器的评估（VISIA扫描）改变面部光老化的自我评估，皮肤癌的风险以及改善防晒习惯的意愿。此外，为了确定VISIA扫描分析是否能揭示出有或没有皮肤癌病史，男性与女性，年龄大于50岁与小于50岁以及Fitzpatrick I-III和IV-VI皮肤类型之间的差异。

方法：招募参加健康博览会的志愿者，并询问他们对皮肤癌的感知风险和皮肤光老化程度。所有参与者都进行了面部两面的面部皮肤质量分析，然后完成了一项后续调查。

结果：在进行VISIA扫描后，参与者对总体皮肤衰老的自我感觉评分在统计学上均显着变差分析。知觉的患皮肤癌风险没有改变，但大多数参与者表示有意改善其防晒习惯。

局限性：本研究的局限性包括选择偏见，召回分类错误和社会可取性偏见。 / p>

结论：进行面部皮肤分析的干预可以正面影响受试者陈述的使用防晒的意图，这表明在这些健康决定中外表的重要性。

J Dermatol。 2017; 16（5）：453-459。 。