GIT, gastrointestinal tract

GIT,胃肠道
  • 文章类型: Journal Article
    未经证实:质子泵抑制剂(PPI)和H2受体阻滞剂是治疗胃和小肠上部溃疡的常用处方药,并用于治疗其他一些常见的胃肠道并发症,如胃食管反流病,食管炎,肠易激综合征,和消化不良.以前的研究声称,除了其他副作用,这些抗溃疡疗法通过干扰肠道矿物质和维生素B12的重吸收而显著改变了骨矿物质密度,而最广泛使用的PPI与髋部和脊柱骨折风险增加显著相关.然而,这些抗溃疡药的潜在骨骼副作用在孟加拉国尚不清楚.
    UNASSIGNED:为了研究孟加拉国患者抗溃疡治疗的安全性问题及其对肌肉骨骼健康的影响,本研究调查了2019年12月至2020年2月5家不同医院的200名患者.
    UNASSIGNED:当前的研究表明,大多数受访者(95%)接受PPI用于胃肠道适应症,而其余受访者则服用H2受体拮抗剂用于胃病。大多数患者单独服用PPI(>3年;95%的受访者)声称一些不寻常的肌肉骨骼副作用,比如软弱,侧腹疼痛,手和脚的痉挛,肌肉疼痛,麻木,和震颤。服用PPI的患者中约有61%出现腰背痛,而颈部疼痛和膝关节疼痛的受访者分别为10%和7%。分别。然而,骨量减少和骨质疏松的发生率也很少。虽然需要进一步的研究来证实这些抗溃疡剂对骨骼的影响,这些患者的反应表明,这些肌肉骨骼副作用可能与骨代谢改变有关。
    未经评估:抗溃疡治疗可能会使患有骨质疏松症或其他骨骼疾病的患者的骨骼代谢恶化,应提高患者和临床医生对患有骨骼疾病的患者谨慎使用PPI的认识和预防措施。
    UNASSIGNED: Proton pump inhibitors (PPIs) and H2 blockers are commonly prescribed medications to treat ulcers in the stomach and the upper part of the small intestine and prescribed for some other common gastrointestinal complications such as gastroesophageal reflux disease, esophagitis, irritable bowel syndrome, and dyspepsia. Previous studies claimed that, apart from other side effects, these anti-ulcerant therapies significantly altered bone mineral density by interfering with intestinal reabsorption of minerals and vitamin B12, and the most widely prescribed PPIs were significantly associated with increased risks of hip and spine fractures. However, the potential skeletal side effects of these antiulcerants are unknown in Bangladesh.
    UNASSIGNED: To examine safety concerns of anti-ulcer therapies and their impact on musculoskeletal health among patients in Bangladesh, the present work surveyed 200 patients in five different hospitals from December 2019 to February 2020.
    UNASSIGNED: The current study revealed that most respondents (95 %) received PPIs for gastrointestinal indications while the rest were taking H2 receptor antagonists for their gastric ailments. Most patients taking PPIs alone (> 3 years; 95 % of respondents) claimed some unusual musculoskeletal side effects, such as weakness, flank pain, spasm of hands and feet, muscle aches, numbness, and tremor. About 61 % of patients taking PPIs experienced low back pain whereas the respondents with neck pain and knee joint pain were 10 % and 7 %, respectively. However, few osteopenia and osteoporotic incidences have been also recorded. Although further studies are required to confirm the impact of these antiulcerants on the bone, these patient responses suggest that these musculoskeletal side effects might have some links with altered bone metabolism.
    UNASSIGNED: It is possible that anti-ulcerant therapies may worsen the bone metabolism of patients suffering from osteoporosis or other bone disorders, and awareness and precautions should be raised among the patients and clinicians for the careful administration of PPIs to patients suffering from bone disorders.
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  • 文章类型: Case Reports
    尾端回归综合征(CRS)是一种罕见的先天性疾病,其特征是尾端脊柱生长停滞,并伴有广泛的多系统异常。在这里,我们介绍了一例新生儿,由于肛门缺孔而没有通过胎粪,并被转诊给儿科外科医生进行紧急分流结肠造口术。传统的X射线,2个月大的腹部超声和腹部骨盆磁共振成像(1.5T)显示右肾发育不全,骶尾部发育不全,椎体发育不良和D12-L1处的脊髓末端具有终止丝的前后带。确诊为CRS。通过这个案例报告,我们希望引起人们对这种罕见的综合征和广泛的相关异常的关注,一旦新生儿有肛门直肠畸形,主要是肛门闭锁,也要考虑在鉴别诊断列表的顶部。
    Caudal regression syndrome (CRS) is a rare congenital disorder characterized by arrest of caudal spinal growth and associated with wide spectrum multisystemic anomalies. Herein, we presented a case of a newborn baby who did not pass meconium due to imperforated anus and was referred to the pediatric surgeon for urgent diverting loop colostomy. The conventional X-ray, abdominal ultrasound and abdominal pelvic magnetic resonance imaging (1.5 T) at 2-month-old age revealed right kidney agenesis, sacrococcygeal agenesis, vertebral bodies dysraphism and the spinal cord ends at D12-L1 with anterior and posterior bands of the terminating filaments. The diagnosis of CRS was confirmed. Through this case report, we hope to draw attention to this rare syndrome and the wide range of associated anomalies, also to consider this syndrome on the top of differential diagnosis list once the newborn has anorectal malformation mainly imperforated anus.
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  • 文章类型: Journal Article
    进口豆粕(SBM)是撒哈拉以南非洲家禽业的主要膳食蛋白质(DP)来源,使家禽生产成本高昂。因此,需要替代本地可用的DP源。我们通过确定其对生长的影响,评估了当地可用的Marula坚果粉(MNM)替代几内亚家禽(GF)饮食中的SBM的潜力,饲料摄入量(FI)、利用率和内脏宏观形态计量学。五种种植者饮食,其中,在CP的基础上,配制0、25、50、75和100%的MNM取代的SBM。三十八只4周龄的钥匙(n=7-8),每个人都单独被关在笼子里,被随机分配到种植者的饮食中,并喂养5周,然后转移到相应的整理日粮中,喂养3周。感应和每周体重,每日FI,和末端车身质量(TBM),身体质量增加(BMG),测定平均日增重(ADG)和饲料转化率(FCR)。在屠杀时,内脏肿块,小肠和大肠的长度,确定胫骨和股骨指数。在生长阶段的第2周,GF饲喂饮食3(50%MNMCP)具有最高的每周BMG和ADG(P<0.05),而在第5周,GF饲喂饮食5(100%MNMCP)具有最高的FI(P<0.05)。饮食MNM不影响GF的BMG,ADG,生长期的第1、3和4周的FI和FCR。在修整阶段的第3周,饲喂GF的饮食3(50%MNMCP)具有最高(P<0.05)的FCR。膳食MNM对试验BMG无影响(P>0.05),GF的ADG和FI,但GF在种植者和整理者饮食3(SBMCP的50%替代)上饲养的GF具有最高(P<0.05)的FCR。MNM对胫骨和股骨肿块没有影响,长度,和质量:GF的长度比和内脏宏观形态计量学。我们得出结论,MNM可以,在CP的基础上,替代SBM,在GF种植者和整理者饮食中,25%,75%和100%不影响增长,FI和GF的利用和内脏。
    Imported soyabean meal (SBM) is the major dietary protein (DP) source for the sub-Saharan African poultry industry making poultry production costly. Therefore, alternative locally available DP sources are required. We evaluated the potential of locally available Marula nut meal (MNM) to substitute SBM in Guinea fowl (GF) diets by determining its effects on growth, feed intake (FI) and utilisation and viscera macromorphometry. Five grower diets wherein, on a CP basis, MNM substituted SBM at 0, 25, 50, 75 and 100% were formulated. Thirty-eight 4-week-old keets (n = 7 - 8), each individually housed in a cage, were randomly assigned to grower diets, and fed for 5 weeks and then transferred to corresponding finisher diets and fed for 3 weeks. Induction and weekly body mass, daily FI, and terminal body mass (TBM), body mass gain (BMG), average daily gain (ADG) and feed conversion ratio (FCR) were determined. On slaughter, viscera masses, small and large intestines lengths, tibiae and femora indices were determined. In week 2 of the grower phase GF fed diet 3 (50% MNM CP) had the highest weekly BMG and ADG (P < 0.05) and in week 5 GF fed diet 5 (100% MNM CP) had the highest FI (P < 0.05). Dietary MNM did not affect the GF\'s BMG, ADG, FI and FCR during weeks 1, 3 and 4 of the grower phase. In week 3 of the finisher phase GF fed diet 3 (50% MNM CP) had the highest (P < 0.05) FCR. Dietary MNM had no effect (P > 0.05) on the trial BMG, ADG and FI of the GF but GF reared on grower and finisher diets 3 (50% substitution of SBM CP) had the highest (P < 0.05) FCR. MNM had no effect on tibiae and femora masses, lengths, and mass: length ratios and viscera macromorphometry of the GF. We conclude that MNM can, on a CP basis, substitute SBM, in GF grower and finisher diets at 25%, 75% and 100% without compromising growth, FI and utilization and viscera of GF.
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  • 文章类型: Journal Article
    在包括加纳在内的许多国家,剖腹产(CS)率最近呈指数级增长,需要了解对儿童健康的潜在长期后果。本研究调查了CS分娩与儿童超重/肥胖风险之间的关系。一项回顾性队列研究于2019年10月至2020年3月在加纳进行。使用多级采样,在儿童福利诊所(CWC)服务期间,从10个医疗机构中选择了553对6-23个月的母婴对。我们使用分层多变量线性回归分析评估了分娩方式(剖宫产与阴道)与随后的年龄体重指数(BMI/年龄Z评分)之间的关联。儿童超重/肥胖(BMI/年龄Z评分>2sd)的患病率为3·6%。调整孕妇孕期体重增加后,巨大儿和儿童喂养方法,通过CS出生的儿童的平均BAZ为0·105标准单位,显着高于通过正常阴道分娩的同事[β系数(β)0·105,(95%CI0·03,0·55)]。CS出生的超重/肥胖几率也比阴道分娩高3·2倍(AOR3·23;95%CI1·14,9·13)。因此,在研究样本中,CS传递与体重(肥胖)增加呈正相关。在调整巨大儿之后,CS分娩与儿童肥胖风险之间的关联减弱。这些结果对于告知临床医生和孕妇考虑CS分娩非常重要。
    The recent exponential increase in caesarean section (CS) rates in many countries including Ghana requires an understanding of the potential long-term consequences on child health. The present study investigated the relationship between CS delivery and risk of childhood overweight/obesity. A retrospective cohort study was conducted from October 2019 to March 2020 in Ghana. Using multi-stage sampling, 553 mother-child pairs aged 6-23 months were selected from ten health facilities during child welfare clinic (CWC) services. We assessed the association between delivery mode (caesarean v. vaginal) and subsequent body mass index for age (BMI/age Z-score) using hierarchical multivariable linear regression analysis. The prevalence of overweight/obesity (BMI/age Z-score > +2 sd) in children was 3⋅6 %. After adjusting for maternal gestational weight gain, macrosomia and child feeding practices, children who were born through CS had mean BAZ which was 0⋅105 standard units significantly higher than their colleagues who were delivered through normal vaginal [beta coefficient (β) 0⋅105, (95 % CI 0⋅03, 0⋅55)]. CS birth was also associated with 3⋅2 times higher odds of overweight/obesity than vaginal delivery (AOR 3⋅23; 95 % CI 1⋅14, 9⋅13). Consequently, CS delivery was associated positively with increased body mass (adiposity) in the study sample. The association between CS delivery and risk of childhood obesity was attenuated after adjusting for macrosomia. These results would be important for informing clinicians and expectant mothers in considering CS delivery.
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  • 文章类型: Journal Article
    初乳质量对于控制反刍动物的最佳生长和早期传染病预防至关重要。在母羊初乳成分上评估了妊娠最后一个月的活酵母补充效果。组成两组携带双胞胎羔羊的母羊(n=14),并在出生后12小时将双胞胎分成两组(母亲或人工喂养)。营养,寡糖(OS),lambing后72小时内测量IgG和乳铁蛋白浓度,在分娩时(T0)收集的初乳中描述了细菌群落。通过测量羔羊血清中的IgG来评估免疫被动转移。在这两组中,初乳营养素,初乳和羔羊血清中的OS浓度和IgG浓度随时间降低(P<0·01),除了乳糖,略有增加(P<0·001),和乳铁蛋白,保持稳定。细菌种群随着时间的推移是稳定的,具有较高的相对丰度的空气球菌科,棒杆菌科,T0初乳中的苦参科和葡萄球菌科。在营养素和乳铁蛋白浓度中未观察到补充的影响。在补充母羊中,在T0时,初乳IgG水平较高,在补充母亲和人工喂养的羔羊中观察到较高的血清IgG水平,而在母羊组中没有观察到补充的效果。使用代谢组学方法,我们发现,补充影响OS组成,在出生后5小时内,初乳Neu-5Gc化合物的水平显着升高。没有观察到补充对细菌组成的影响。我们的数据表明,补充活酵母可以抵消新生羔羊早期分离和初乳不完全喂养的负面影响。
    Colostrum quality is of paramount importance in the management of optimal ruminant growth and infectious disease prevention in early life. Live yeast supplementation effect during the last month of gestation was evaluated on ewes\' colostrum composition. Two groups of ewes (n = 14) carrying twin lambs were constituted and twins were separated into groups (mothered or artificially fed) 12 h after birth. Nutrient, oligosaccharides (OS), IgG and lactoferrin concentrations were measured over 72 h after lambing, and bacterial community was described in colostrum collected at parturition (T0). Immune passive transfer was evaluated through IgG measurement in lamb serum. In both groups, colostral nutrient, OS concentrations and IgG concentrations in colostrum and lamb serum decreased over time (P < 0⋅01), except for lactose, which slightly increased (P < 0⋅001), and lactoferrin, which remained stable. Bacterial population was stable over time with high relative abundances of Aerococcaceae, Corynebacteriaceae, Moraxellaceae and Staphylococcaceae in T0 colostrum. No effect of supplementation was observed in nutrient and lactoferrin concentrations. In supplemented ewes, the level of colostral IgG was higher at T0 and a higher level of serum IgG was observed in lambs born from supplemented mothers and artificially fed, while no effect of supplementation was observed in the mothered lamb groups. Using a metabolomic approach, we showed that supplementation affected OS composition with significantly higher levels of colostral Neu-5Gc compounds up to 5 h after birth. No effect of supplementation was observed on bacterial composition. Our data suggest that live yeast supplementation offsets the negative impact of early separation and incomplete colostrum feeding in neonate lambs.
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  • 文章类型: Journal Article
    尽管几种人工纳米疗法已被批准用于转移性乳腺癌的实际治疗,他们低效的治疗结果,严重的不良影响,大规模生产的高成本仍然是关键的挑战。在这里,我们开发了一种替代策略,通过使用来自茶花的天然纳米载体(TFEN)特异性触发乳腺肿瘤细胞凋亡并抑制其肺转移.这些纳米载体具有理想的粒径(131nm),外泌体样形态,和负zeta电位。此外,TFEN被发现含有大量的多酚,黄酮类化合物,功能蛋白,和脂质。细胞实验表明,由于刺激活性氧(ROS)扩增,TFEN对癌细胞显示出强细胞毒性。细胞内ROS数量的增加不仅可以触发线粒体损伤,但也阻止细胞周期,导致体外抗增殖,反移民,和抗乳腺癌细胞侵袭活性。进一步的小鼠研究表明,静脉内(i.v.)注射或口服给药后的TFEN可以在乳腺肿瘤和肺转移部位积聚,抑制乳腺癌的生长和转移,并调节肠道微生物群。这项研究为通过静脉内和口服途径抑制乳腺癌及其肺转移的天然外泌体样纳米平台的绿色生产带来了新的见解。
    Although several artificial nanotherapeutics have been approved for practical treatment of metastatic breast cancer, their inefficient therapeutic outcomes, serious adverse effects, and high cost of mass production remain crucial challenges. Herein, we developed an alternative strategy to specifically trigger apoptosis of breast tumors and inhibit their lung metastasis by using natural nanovehicles from tea flowers (TFENs). These nanovehicles had desirable particle sizes (131 nm), exosome-like morphology, and negative zeta potentials. Furthermore, TFENs were found to contain large amounts of polyphenols, flavonoids, functional proteins, and lipids. Cell experiments revealed that TFENs showed strong cytotoxicities against cancer cells due to the stimulation of reactive oxygen species (ROS) amplification. The increased intracellular ROS amounts could not only trigger mitochondrial damage, but also arrest cell cycle, resulting in the in vitro anti-proliferation, anti-migration, and anti-invasion activities against breast cancer cells. Further mice investigations demonstrated that TFENs after intravenous (i.v.) injection or oral administration could accumulate in breast tumors and lung metastatic sites, inhibit the growth and metastasis of breast cancer, and modulate gut microbiota. This study brings new insights to the green production of natural exosome-like nanoplatform for the inhibition of breast cancer and its lung metastasis via i.v. and oral routes.
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  • 文章类型: Journal Article
    背景:淀粉是可消化碳水化合物和能量的主要膳食来源。对含淀粉食物的血糖和胰岛素反应差异很大,对含淀粉食物的葡萄糖反应通常由血糖指数(GI)和/或血糖负荷(GL)描述。低GI/GL食物有益于心脏代谢紊乱的管理(例如,2型糖尿病,心血管疾病)。含淀粉食物的消化速率和程度的差异将影响餐后血糖。
    未经鉴定:淀粉分解动力学受食品基质和淀粉本身的结构性质的影响。天然(生)半结晶淀粉消化缓慢,但水热处理(烹饪)会使淀粉糊化并大大提高其消化率。在植物中,淀粉颗粒包含在细胞内,完整的细胞壁会限制水和消化酶的可及性,从而阻碍糊化和消化性。通过α-淀粉酶模型消化早期阶段的淀粉消化的体外研究,可以暗示体内消化的可能速率和预期的血糖反应。报道说,对膳食淀粉的代谢反应受α-淀粉酶基因拷贝数的影响,提高对淀粉分解的兴趣。
    结论:这篇综述显示了酶动力学策略如何为不同淀粉食物的消化率差异提供解释。Michaelis-Menten和LogofSlope分析提供了动力学参数(例如,Km和kcat/Km)用于评估催化效率和α-淀粉酶对淀粉的消化率。合适的动力学方法最大化可从体外工作获得的信息,用于预测体内淀粉消化和血糖反应。
    BACKGROUND: Starch is a principal dietary source of digestible carbohydrate and energy. Glycaemic and insulinaemic responses to foods containing starch vary considerably and glucose responses to starchy foods are often described by the glycaemic index (GI) and/or glycaemic load (GL). Low GI/GL foods are beneficial in the management of cardiometabolic disorders (e.g., type 2 diabetes, cardiovascular disease). Differences in rates and extents of digestion of starch-containing foods will affect postprandial glycaemia.
    UNASSIGNED: Amylolysis kinetics are influenced by structural properties of the food matrix and of starch itself. Native (raw) semi-crystalline starch is digested slowly but hydrothermal processing (cooking) gelatinises the starch and greatly increases its digestibility. In plants, starch granules are contained within cells and intact cell walls can limit accessibility of water and digestive enzymes hindering gelatinisation and digestibility. In vitro studies of starch digestion by α-amylase model early stages in digestion and can suggest likely rates of digestion in vivo and expected glycaemic responses. Reports that metabolic responses to dietary starch are influenced by α-amylase gene copy number, heightens interest in amylolysis.
    CONCLUSIONS: This review shows how enzyme kinetic strategies can provide explanations for differences in digestion rate of different starchy foods. Michaelis-Menten and Log of Slope analyses provide kinetic parameters (e.g., K m and k cat /K m ) for evaluating catalytic efficiency and ease of digestibility of starch by α-amylase. Suitable kinetic methods maximise the information that can be obtained from in vitro work for predictions of starch digestion and glycaemic responses in vivo.
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  • 文章类型: Journal Article
    肽和蛋白质的口服递送受到它们在胃肠道中的快速蛋白水解和它们不能渗透生物膜的阻碍。正在研究和实施各种药物递送方法以克服这些障碍。在对猪进行的讨论研究中,进行了一项研究,以评估渗透促进剂-salcaprozate钠的组合的效果,和蛋白水解抑制剂-大豆胰蛋白酶抑制剂,关于肽特立帕肽的全身暴露,十二指肠内给药后。结果表明,与这些方法各自相比,该组合实现了显著更高的Cmax和AUC(分别为~10倍和~20倍)。因此得出结论,不同技术方法的适当组合可能会大大有助于生物大分子的有效口服递送。
    Oral delivery of peptides and proteins is hindered by their rapid proteolysis in the gastrointestinal tract and their inability to permeate biological membranes. Various drug delivery approaches are being investigated and implemented to overcome these obstacles. In the discussed study conducted in pigs, an investigation was undertaken to assess the effect of combination of a permeation enhancer - salcaprozate sodium, and a proteolysis inhibitor - soybean trypsin inhibitor, on the systemic exposure of the peptide teriparatide, following intraduodenal administration. Results demonstrate that this combination achieves significantly higher Cmax and AUC (~10- and ~20-fold respectively) compared to each of these methodologies on their own. It was thus concluded that an appropriate combination of different technological approaches may considerably contribute to an efficient oral delivery of biological macromolecules.
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  • 文章类型: Journal Article
    炎症性肠病(IBD)是一种慢性肠道疾病,临床表现痛苦,癌变风险高。目前没有治疗IBD的治疗方法,大力提倡开发有效的疗法。已经广泛研究了药物递送系统,以通过由炎症引起的增强的渗透性和保留(EPR)效应将治疗剂传递到发炎的结肠部位。然而,由于非靶向药物释放,该药物仍然无法达到仅利用EPR效应的有效浓度值,并且在发炎区域显示出更好的治疗效果.大量研究表明,IBD发生时,一些特异性受体和细胞粘附分子在结肠内皮和/或免疫细胞表面高表达,靶向此类受体和细胞粘附分子的配体修饰的药物递送系统可以特异性地将药物递送到发炎部位并获得巨大的疗效。本文介绍了结肠炎症部位过表达的受体和细胞粘附分子,并回顾了相关配体功能化的药物传递系统。最后,提出了该领域的挑战和未来方向,以推进用于治疗IBD的受体介导的靶向药物递送系统的开发。
    Inflammatory bowel disease (IBD) is a chronic intestinal disease with painful clinical manifestations and high risks of cancerization. With no curative therapy for IBD at present, the development of effective therapeutics is highly advocated. Drug delivery systems have been extensively studied to transmit therapeutics to inflamed colon sites through the enhanced permeability and retention (EPR) effect caused by the inflammation. However, the drug still could not achieve effective concentration value that merely utilized on EPR effect and display better therapeutic efficacy in the inflamed region because of nontargeted drug release. Substantial researches have shown that some specific receptors and cell adhesion molecules highly expresses on the surface of colonic endothelial and/or immune cells when IBD occurs, ligand-modified drug delivery systems targeting such receptors and cell adhesion molecules can specifically deliver drug into inflamed sites and obtain great curative effects. This review introduces the overexpressed receptors and cell adhesion molecules in inflamed colon sites and retrospects the drug delivery systems functionalized by related ligands. Finally, challenges and future directions in this field are presented to advance the development of the receptor-mediated targeted drug delivery systems for the therapy of IBD.
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  • 文章类型: Journal Article
    口服药物实体必须在恶劣的胃肠道环境中生存,在到达体循环之前,穿透肠上皮细胞并绕过肝脏代谢。而通过采取适当的措施可以很好地维持胃肠道的稳定性,肝代谢是首过代谢药物的强大屏障。制药学术界和工业界正在寻求药物运输的替代途径,以规避与门户途径相关的问题。肠淋巴运输正在成为实现这一目标的有希望的途径。在这次审查中,我们打算提供有关基本原理的最新概述,战略,肠道淋巴运输的相关因素及应用。经口淋巴运输主要有两种途径-乳糜微粒和微折细胞途径。潜在的机制正在逐步解开,如今见证了越来越多的研究投入和应用。
    Orally administered drug entities have to survive the harsh gastrointestinal environment, penetrate the enteric epithelia and circumvent hepatic metabolism before reaching the systemic circulation. Whereas the gastrointestinal stability can be well maintained by taking proper measures, hepatic metabolism presents as a formidable barrier to drugs suffering from first-pass metabolism. The pharmaceutical academia and industries are seeking alternative pathways for drug transport to circumvent problems associated with the portal pathway. Intestinal lymphatic transport is emerging as a promising pathway to this end. In this review, we intend to provide an updated overview on the rationale, strategies, factors and applications involved in intestinal lymphatic transport. There are mainly two pathways for peroral lymphatic transport-the chylomicron and the microfold cell pathways. The underlying mechanisms are being unraveled gradually and nowadays witness increasing research input and applications.
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