Survivin基因沉默鼻咽癌G666-1细胞的生物学特性

背景：Survivin基因是迄今发现的最强效的凋亡抑制因子,能够抑制肿瘤细胞的增殖、迁移能力,成为近年有关肿瘤研究的热点之一。目的：探讨Survivin基因沉默对鼻咽癌G666-1细胞生物学特性的影响。方法：设计及合成Survivin的siRNA序列,Lipofectamine^TM 2000转染G666-1细胞,利用RT-PCR、Western blot检测Survivin基因沉默后的G666-1细胞Survivin mRNA及蛋白的表达,流式细胞仪检测G666-1细胞中肿瘤干细胞标志物CD44⁺CD133⁺的表达变化。另外还采用CCK-8增殖实验、划痕愈合实验、细胞侵袭实验评价Survivin基因沉默对鼻咽癌G666-1细胞增殖、迁移、侵袭能力的影响。结果与结论：与对照组、空白组比较,实验组Survivin 基因沉默后的鼻咽癌G666-1细胞Survivin mRNA及蛋白表达显著降低,差异有显著性意义(P < 0.05);与对照组、空白组比较,实验组Survivin 基因沉默后的鼻咽癌G666-1细胞的生长速度明显减慢,增殖能力受到抑制,迁移能力和侵袭能力显著下降,差异有显著性意义(P < 0.05);肿瘤干细胞标志物CD44⁺CD133⁺的表达比例显著降低(P < 0.05)。结果表明特异性干扰Survivin基因表达可抑制鼻咽癌G666-1细胞的增殖、迁移和侵袭能力,使具有CD44⁺CD133⁺肿瘤干细胞特性的细胞比例降低,因此,Survivin基因沉默可能成为有效治疗鼻咽癌的新靶点。 中国组织工程研究杂志出版内容重点：干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程     

siRNA下调RRM2抑制人乳腺癌细胞增殖与迁移及其裸鼠皮下移植瘤的生长

目的: 探讨siRNA下调核糖核苷酸还原酶M2(ribonucleotide reductase M2,RRM2) 基因对人乳腺癌细胞MCF-7体外增殖、迁移和体内成瘤的影响。方法: 实时定量荧光PCR (real-time PCR) 及Western blotting技术检测人乳腺癌细胞MCF-7和人正常乳腺上皮细胞MCF-10A中RRM2 mRNA及蛋白的表达;用合成的siRNA-RRM2不同时点和不同剂量转染MCF-7细胞,用real-time PCR检测对RRM2基因的沉默效率;用CCK-8方法检测细胞增殖;用Transwell细胞迁移系统检测siRNA-RRM2对MCF-7细胞迁移能力的影响;裸鼠移植瘤实验检测siRNA-RRM2沉默MCF-7细胞的RRM2基因后对肿瘤生长的影响。结果: MCF-7细胞RRM2 mRNA和蛋白比MCF-10A细胞高表达;用siRNA-RRM2转染MCF-7乳腺癌细胞能时间及剂量依赖性下调RRM2基因表达;CCK-8方法结果显示下调RRM2基因会时间及剂量依赖性抑制MCF-7细胞增殖,而人正常乳腺上皮细胞增殖没有显著变化;Transwell细胞迁移系统检测显示下调RRM2基因显著抑制了MCF-7细胞的迁移能力;转染siRNA-RRM2下调RRM2基因能显著抑制裸鼠移植瘤的生长。结论: RRM2的过表达与人乳腺癌细胞的高增殖和迁移能力有关,抑制RRM2的功能是治疗乳腺癌的一个潜在的治疗策略。     

靶向血管内皮生长因子C短发夹式RNA对人乳腺癌MCF-7细胞生物学特性的影响

目的 研究重组质粒表达载体介导的短发夹式RNA(shRNA)对乳腺癌MCF-7细胞株中血管内皮生长因子C(VEGF-C)的表达及乳腺癌细胞增殖、侵袭能力的影响.方法 脂质体介导重组质粒pSIREN-VEGF-C转染乳腺癌MCF-7细胞株,嘌呤酶素筛选阳性克隆;荧光定量PCR及Western blot检测转染前后乳腺癌MCF-7细胞中VEGF-C基因的表达;MTT法及Transwell体外侵袭实验检测转染前后乳腺癌MCF-7细胞的增殖及侵袭能力.结果 转染重组质粒后乳腺癌MCF-7细胞中VEGF-C mRNA及蛋白表达均明显下调,抑制率分别为95%及100%(P<0.05);MTT法和 Transwell体外侵袭实验显示,与阴性质粒组和空白对照组比较,转染重组质粒后各时间段乳腺癌MCF-7细胞增殖均明显受抑制(P<0.05),同时穿膜的肿瘤细胞数也明显减少[(29.0±1.9)个与(59.0±2.1)个和(61.0±2.2)个相比,P<0.05].结论 表达VEGF-C shRNA的重组质粒载体pSIREN-VEGF-C在乳腺癌MCF-7细胞中能高效、特异地发挥靶基因沉默作用,并对乳腺癌细胞的增殖及侵袭能力有显著抑制作用.     

靶向血管内皮生长因子C短发夹式RNA对人乳腺癌MCF-7细胞生物学特性的影响

目的 研究重组质粒表达载体介导的短发夹式RNA(shRNA)对乳腺癌MCF-7细胞株中血管内皮生长因子C(VEGF-C)的表达及乳腺癌细胞增殖、侵袭能力的影响.方法 脂质体介导重组质粒pSIREN-VEGF-C转染乳腺癌MCF-7细胞株,嘌呤酶素筛选阳性克隆;荧光定量PCR及Western blot检测转染前后乳腺癌MCF-7细胞中VEGF-C基因的表达;MTT法及Transwell体外侵袭实验检测转染前后乳腺癌MCF-7细胞的增殖及侵袭能力.结果 转染重组质粒后乳腺癌MCF-7细胞中VEGF-C mRNA及蛋白表达均明显下调,抑制率分别为95%及100%(P<0.05);MTT法和 Transwell体外侵袭实验显示,与阴性质粒组和空白对照组比较,转染重组质粒后各时间段乳腺癌MCF-7细胞增殖均明显受抑制(P<0.05),同时穿膜的肿瘤细胞数也明显减少[(29.0±1.9)个与(59.0±2.1)个和(61.0±2.2)个相比,P<0.05].结论 表达VEGF-C shRNA的重组质粒载体pSIREN-VEGF-C在乳腺癌MCF-7细胞中能高效、特异地发挥靶基因沉默作用,并对乳腺癌细胞的增殖及侵袭能力有显著抑制作用.     

靶向血管内皮生长因子C短发夹式RNA对人乳腺癌MCF-7细胞生物学特性的影响

目的 研究重组质粒表达载体介导的短发夹式RNA(shRNA)对乳腺癌MCF-7细胞株中血管内皮生长因子C(VEGF-C)的表达及乳腺癌细胞增殖、侵袭能力的影响.方法 脂质体介导重组质粒pSIREN-VEGF-C转染乳腺癌MCF-7细胞株,嘌呤酶素筛选阳性克隆;荧光定量PCR及Western blot检测转染前后乳腺癌MCF-7细胞中VEGF-C基因的表达;MTT法及Transwell体外侵袭实验检测转染前后乳腺癌MCF-7细胞的增殖及侵袭能力.结果 转染重组质粒后乳腺癌MCF-7细胞中VEGF-C mRNA及蛋白表达均明显下调,抑制率分别为95%及100%(P<0.05);MTT法和 Transwell体外侵袭实验显示,与阴性质粒组和空白对照组比较,转染重组质粒后各时间段乳腺癌MCF-7细胞增殖均明显受抑制(P<0.05),同时穿膜的肿瘤细胞数也明显减少[(29.0±1.9)个与(59.0±2.1)个和(61.0±2.2)个相比,P<0.05].结论 表达VEGF-C shRNA的重组质粒载体pSIREN-VEGF-C在乳腺癌MCF-7细胞中能高效、特异地发挥靶基因沉默作用,并对乳腺癌细胞的增殖及侵袭能力有显著抑制作用.     

靶向血管内皮生长因子C短发夹式RNA对人乳腺癌MCF-7细胞生物学特性的影响

目的 研究重组质粒表达载体介导的短发夹式RNA(shRNA)对乳腺癌MCF-7细胞株中血管内皮生长因子C(VEGF-C)的表达及乳腺癌细胞增殖、侵袭能力的影响.方法 脂质体介导重组质粒pSIREN-VEGF-C转染乳腺癌MCF-7细胞株,嘌呤酶素筛选阳性克隆;荧光定量PCR及Western blot检测转染前后乳腺癌MCF-7细胞中VEGF-C基因的表达;MTT法及Transwell体外侵袭实验检测转染前后乳腺癌MCF-7细胞的增殖及侵袭能力.结果 转染重组质粒后乳腺癌MCF-7细胞中VEGF-C mRNA及蛋白表达均明显下调,抑制率分别为95%及100%(P<0.05);MTT法和 Transwell体外侵袭实验显示,与阴性质粒组和空白对照组比较,转染重组质粒后各时间段乳腺癌MCF-7细胞增殖均明显受抑制(P<0.05),同时穿膜的肿瘤细胞数也明显减少[(29.0±1.9)个与(59.0±2.1)个和(61.0±2.2)个相比,P<0.05].结论 表达VEGF-C shRNA的重组质粒载体pSIREN-VEGF-C在乳腺癌MCF-7细胞中能高效、特异地发挥靶基因沉默作用,并对乳腺癌细胞的增殖及侵袭能力有显著抑制作用.     

靶向血管内皮生长因子C短发夹式RNA对人乳腺癌MCF-7细胞生物学特性的影响

目的 研究重组质粒表达载体介导的短发夹式RNA(shRNA)对乳腺癌MCF-7细胞株中血管内皮生长因子C(VEGF-C)的表达及乳腺癌细胞增殖、侵袭能力的影响.方法 脂质体介导重组质粒pSIREN-VEGF-C转染乳腺癌MCF-7细胞株,嘌呤酶素筛选阳性克隆;荧光定量PCR及Western blot检测转染前后乳腺癌MCF-7细胞中VEGF-C基因的表达;MTT法及Transwell体外侵袭实验检测转染前后乳腺癌MCF-7细胞的增殖及侵袭能力.结果 转染重组质粒后乳腺癌MCF-7细胞中VEGF-C mRNA及蛋白表达均明显下调,抑制率分别为95%及100%(P<0.05);MTT法和 Transwell体外侵袭实验显示,与阴性质粒组和空白对照组比较,转染重组质粒后各时间段乳腺癌MCF-7细胞增殖均明显受抑制(P<0.05),同时穿膜的肿瘤细胞数也明显减少[(29.0±1.9)个与(59.0±2.1)个和(61.0±2.2)个相比,P<0.05].结论 表达VEGF-C shRNA的重组质粒载体pSIREN-VEGF-C在乳腺癌MCF-7细胞中能高效、特异地发挥靶基因沉默作用,并对乳腺癌细胞的增殖及侵袭能力有显著抑制作用.     

靶向血管内皮生长因子C短发夹式RNA对人乳腺癌MCF-7细胞生物学特性的影响

目的 研究重组质粒表达载体介导的短发夹式RNA(shRNA)对乳腺癌MCF-7细胞株中血管内皮生长因子C(VEGF-C)的表达及乳腺癌细胞增殖、侵袭能力的影响.方法 脂质体介导重组质粒pSIREN-VEGF-C转染乳腺癌MCF-7细胞株,嘌呤酶素筛选阳性克隆;荧光定量PCR及Western blot检测转染前后乳腺癌MCF-7细胞中VEGF-C基因的表达;MTT法及Transwell体外侵袭实验检测转染前后乳腺癌MCF-7细胞的增殖及侵袭能力.结果 转染重组质粒后乳腺癌MCF-7细胞中VEGF-C mRNA及蛋白表达均明显下调,抑制率分别为95%及100%(P<0.05);MTT法和 Transwell体外侵袭实验显示,与阴性质粒组和空白对照组比较,转染重组质粒后各时间段乳腺癌MCF-7细胞增殖均明显受抑制(P<0.05),同时穿膜的肿瘤细胞数也明显减少[(29.0±1.9)个与(59.0±2.1)个和(61.0±2.2)个相比,P<0.05].结论 表达VEGF-C shRNA的重组质粒载体pSIREN-VEGF-C在乳腺癌MCF-7细胞中能高效、特异地发挥靶基因沉默作用,并对乳腺癌细胞的增殖及侵袭能力有显著抑制作用.     

靶向血管内皮生长因子C短发夹式RNA对人乳腺癌MCF-7细胞生物学特性的影响

目的 研究重组质粒表达载体介导的短发夹式RNA(shRNA)对乳腺癌MCF-7细胞株中血管内皮生长因子C(VEGF-C)的表达及乳腺癌细胞增殖、侵袭能力的影响.方法 脂质体介导重组质粒pSIREN-VEGF-C转染乳腺癌MCF-7细胞株,嘌呤酶素筛选阳性克隆;荧光定量PCR及Western blot检测转染前后乳腺癌MCF-7细胞中VEGF-C基因的表达;MTT法及Transwell体外侵袭实验检测转染前后乳腺癌MCF-7细胞的增殖及侵袭能力.结果 转染重组质粒后乳腺癌MCF-7细胞中VEGF-C mRNA及蛋白表达均明显下调,抑制率分别为95%及100%(P<0.05);MTT法和 Transwell体外侵袭实验显示,与阴性质粒组和空白对照组比较,转染重组质粒后各时间段乳腺癌MCF-7细胞增殖均明显受抑制(P<0.05),同时穿膜的肿瘤细胞数也明显减少[(29.0±1.9)个与(59.0±2.1)个和(61.0±2.2)个相比,P<0.05].结论 表达VEGF-C shRNA的重组质粒载体pSIREN-VEGF-C在乳腺癌MCF-7细胞中能高效、特异地发挥靶基因沉默作用,并对乳腺癌细胞的增殖及侵袭能力有显著抑制作用.     

靶向血管内皮生长因子C短发夹式RNA对人乳腺癌MCF-7细胞生物学特性的影响

目的 研究重组质粒表达载体介导的短发夹式RNA(shRNA)对乳腺癌MCF-7细胞株中血管内皮生长因子C(VEGF-C)的表达及乳腺癌细胞增殖、侵袭能力的影响.方法 脂质体介导重组质粒pSIREN-VEGF-C转染乳腺癌MCF-7细胞株,嘌呤酶素筛选阳性克隆;荧光定量PCR及Western blot检测转染前后乳腺癌MCF-7细胞中VEGF-C基因的表达;MTT法及Transwell体外侵袭实验检测转染前后乳腺癌MCF-7细胞的增殖及侵袭能力.结果 转染重组质粒后乳腺癌MCF-7细胞中VEGF-C mRNA及蛋白表达均明显下调,抑制率分别为95%及100%(P<0.05);MTT法和 Transwell体外侵袭实验显示,与阴性质粒组和空白对照组比较,转染重组质粒后各时间段乳腺癌MCF-7细胞增殖均明显受抑制(P<0.05),同时穿膜的肿瘤细胞数也明显减少[(29.0±1.9)个与(59.0±2.1)个和(61.0±2.2)个相比,P<0.05].结论 表达VEGF-C shRNA的重组质粒载体pSIREN-VEGF-C在乳腺癌MCF-7细胞中能高效、特异地发挥靶基因沉默作用,并对乳腺癌细胞的增殖及侵袭能力有显著抑制作用.     

Schizophrenia in a North Swedish geographical isolate, 1900–1977. Epidemiology, genetics and biochemistry

Over 200 schizophrenic patients belonging to three major and interrelated pedigree complexes have been investigated over the past 30 years in a North Swedish geographically isolated population, presently numbering about 6,000. An intensive investigation of a number of biochemical correlates and genetic markers in a few selected families belonging to one of the major pedigrees has indicated new strategies for the current research program.
Schizophrenia, as defined operationally, is significantly associated with decreased activities of two enzymes (1) blood platelet monoamine oxidase, (2) plasma dopamine-β-hydroxylase, and (3) with the genetic marker Gc² (group specific antigen). Both enzymes are subject to genetic variation. A positive score for linkage between schizophrenia and low plasma DBH activity has been calculated, but, so far, available data are insufficient for discrimination between linkage and partial contribution of genetically controlled low plasma DBH to the pathogenesis of the disease. Alternatively, both mechanisms could be involved.
As a model for continued research, schizophrenia is explained as based on a double dominant-recessive genotype (Aabb), representing a vulnerability which in about 50 % of cases develops into clinical schizophrenia. It is suggested that the dominant mutation (A) operates on or affects MAO activity, and that the recessive genotype (bb) is instrumental in low variates of DBH activity and very likely such variates within the normal range of physiological variation. Moreover, it is suggested that the combined effects of MAO- and DBH-reduced efficiency on the metabolism of e.g. dopamine could be an essential pathogenic mechanism for the schizophrenic illness which is segregating in this population.     

Renal dysplasia and asplenia in two sibs

A family is reported in which two sibs, one male and the other female, both died within 24 hours of birth with enlarged polycystic kidneys. Postmortem histology in the second child showed gross renal dysplasia. In both children the pancreas was enlarged, nodular and cystic but the liver appeared macroscopically normal. In the second child, histological examination confirmed pancreatic fibrosis with cystic dilation of ducts, but showed portal fibrosis with bile duct proliferation in the liver.
This combination of findings is very reminiscent of those in a girl and her brother reported by Ivemark et al. (1959). The children reported here also showed absence or hypoplasia of the spleen, cardiac anomalies and other features of the Ivemark syndrome (Ivemark 1955), a quite different, usually sporadic, congenital disorder. It is suggested that the children described here have a distinct lethal congenital disorder, probably inherited in an autosomal recessive manner.     

The dominant diseases of modernized societies as omega-3 essential fatty acid deficiency syndrome: Substrate beriberi

About 1900, modern food selection and processing caused widespread $\text{epidemics}$ of the B vitamin deficiency diseases of beriberi and pellagra which, for genetic reasons, often expressed as different diseases ranging from bowel and heart disease to dermatoses and psychoses. But the B vitamins merely help convert essential fatty acids (EFA) into the prostaglandin (PG) tissue regulators and it now turns out that, through hydrogenation, milling and selection of w3-poor southern foods, we have also been systematically depleting, by as much as 90%, a newly discovered trace Nordic EFA (w3) of special importance to primates and sole precursor of the PG3(4) series, even as a concurrent fiber deficiency increases body demand for EFA. Since substrate EFA is processed by many B vitamin catalysts, an EFA deficiency will mimic a $\text{panh}$ypovitaminosis B, i.e., a mixture of $\text{substrate}$ beriberi and $\text{substrate}$ pellagra resembling vitamin beriberi and pellagra but exhibiting as even more diverse $\text{endemic}$ disease. This would consitute a second stage of the Modern Malnutrition and explain why some workers now hold the dominant diseases of modermized societies to be new, nutritionally based, pellagraform yet lipid-related and to range, once again, from heart disease to psychosis. It is an assumption that our dominant diseases are unrelated to each other or are merely revealed by our diagnostic acumen and therapeutic success; and that hydrogenating millions of tons of food oils annually, to destroy the rancidity producing w3-EFA, is safe for $\text{primates}$. Extensive beriberiform disease is reported here in 32 typical cases taken from medical practice which responds strikingly to linseed oil supplements (60% w3-EFA) in confirmation of identical results in Capuchins.     

'Very sore nights and days': the child's experience of illness in early modern England, c.1580-1720

Sick children were ubiquitous in early modern England, and yet they have received very little attention from historians. Taking the elusive perspective of the child, this article explores the physical, emotional, and spiritual experience of illness in England between approximately 1580 and 1720. What was it like being ill and suffering pain? How did the young respond emotionally to the anticipation of death? It is argued that children’s experiences were characterised by profound ambivalence: illness could be terrifying and distressing, but also a source of emotional and spiritual fulfilment and joy. This interpretation challenges the common assumption amongst medical historians that the experiences of early modern patients were utterly miserable. It also sheds light on children’s emotional feelings for their parents, a subject often overlooked in the historiography of childhood. The primary sources used in this article include diaries, autobiographies, letters, the biographies of pious children, printed possession cases, doctors’ casebooks, and theological treatises concerning the afterlife.     

Guidelines for the Validation and Use of Immunoassays for Determination of Introduced Proteins in Biotechnology Enhanced Crops and Derived Food Ingredients

Recent advancements in agricultural biotechnology have created a need for analytical techniques to determine introduced proteins in crops enhanced through modern biotechnology techniques. These proteins are expressed in plant tissues and may be present in food ingredients. Immunoassays are ideally suited for protein detection and may be used as both quantitative and threshold methods. Microplate ELISA and lateral flow devices are two of the most commonly used immunoassay formats for agricultural biotechnology applications. This paper provides general background information and a discussion of criteria for the validation and application of immunochemical methods to the analysis of proteins introduced into plants and food ingredients using biotechnology methods. It is the result of a collaborative effort of members of the Analytical Environmental Immunochemical Consortium. This collaborative effort represents the combined expertise of several organizations to reach consensus on establishing guidelines for the validation and use of immunoassays. Further, the paper offers developers and users a consistent approach to adopting the technology as well as aid in producing accurate and meaningful results.     

HLA in North Colombia Chimila Amerindians

HLA-A,-B,-C,-DRB1 and -DQB1 alleles have been studied in Chimila Amerindians from Sabana de San Angel (North Colombian Coast) by using high resolution molecular typing. A frequent extended haplotype was found:HLA-A*24:02-B*51:10-C*15:02-BRB1*04:07-DQB1*03:02 (28.7%) which has also been described in Amerinndian Mayos Mexican population (Mexico, California Gulf, Pacific Ocean). Other haplotypes had already been found in Amerindians from Mexico (Pacific and Atlantic Coast), Peru (highlands and Amazon Basin), Bolivia and North USA. A geographic pattern according to HLA allele or haplotype frequencies is lacking in Amerindians, as already known. Also, five new extended haplotypes were found in Chimila Amerindians. Their HLA-A*24:02 high frequencies characteristic is shared with aboriginal populations of Taiwan; also, HLA-C*01:02 high frequencies are found in New Zealand Maoris, New Caledonians and Kimberly Aborigines from Australia. Finally, this study may show a model of evolutionary factors acting and rising one HLA allele frequency (-A*24:02), but not in others that belong to the same or different HLA loci.     

Ultracryotomy: development and application (with examples from the yeast cytology) (author's transl)

The preparation steps usually necessary for obtaining ultrathin frozen sections of biological material (chemical prefixation, enclosing, cryoprotective treatment, freezing, sectioning, and post-staining the sections for transmission electron microscopy) are submitted to a critical analysis. The application of cryo-ultramicrotomy, in particularly for cytochemical purposes, is reviewed. Fundamental considerations of chemical prefixation and poststaining are supported by examples from yeast cytology. Furthermore, the efficiency of the cryo-ultramicrotomy (electron optical resolution of ultrastructural details) is demonstrated on yeast cells and protoplasts.     

The universal muscular chamber. A basic unit of the genitourinary, cardiovascular, gastro-intestinal, skeletal, cutaneous, respiratory and other systems, endocameral hypertension; and spasm, the key to their idiopathic diseases and arthropathies

Starting with the integument, we see many organs are contractile sacs or multiples thereof, which tubes or bags constitute the major part of the entire body. Recognition of this basic unit and its characteristics sheds new light, individually and collectively, on many disorders previously considered unrelated. Muscular tears and perforations develop in the walls of these chambers, being no way peculiar to those organs, wherein, hydrochloric acid occurs. So, it is not necessary to explain the absence of excessive acid from patients who exhibit holes in the gastric, uterine, aortic, duodenal, rectal, pulmonary, retina, and other walls. Muscle, not acid is the great common factor relating idiopathic disorders in the gastrointestinal tract to each other and to similar diseases in other systems. When the units are linked together, the lesions tend to appear as arthropathies, i.e. at the joints. Rephrasing common-place observations, frees us from conventional, conceptual cul-de-sacs. An observation is only as good as its interpretation, so all possibilities must be considered, otherwise, we will remain blinded by our misconceptions.     

Der Einfluß von Nahrungsmitteln und Rauchen auf die klinisch-chemische Diagnostik von Phäochromozytom,Neuroblastom und Karzinoid-Syndrom

Zusammenfassung Der Einfluß von verschiedenen Nahrungsmitteln auf Methoden zur Bestimmung von Adrenalin (AD), Noradrenalin (NA), Vanillinmandelsäure (VMS), Metanephrinen (MN), Homovanillinsäure (HVS) und 5-Hydroxyindolessigsäure (5-HIE) im 24 h-Harn zur Diagnose des Phäochromozytoms bzw. Karzinoid-Syndroms wurde untersucht. Die in die Untersuchung einbezogenen Nahrungsmittel waren: Tee, Kaffee, Mandeln, Ananas, Käse, Walnüsse, Vanillepudding, Bananen, Tomaten und Milchschokolade. Außerdem wurde der Einfluß des Zigarettenrauchens auf die Bestimmung von AD, NA, VMS und MN untersucht.Walnüsse führten zu einer starken Erhöhung der 5-HIE-Ausscheidung. Bananen erhöhten die Ausscheidung von AD, NA, VMS, MN und 5-HIE. Kaffee und Ananas bewirkten eine geringe Zunahme der MN-Werte. Rauchen von 20–30 Zigaretten/Tag beeinflußte keine der vier Variablen.Wenn die beschriebenen Methoden benutzt werden, sollte lediglich auf den Verzehr von Bananen und Walnüssen vor und während der Harnsammelperioden verzichtet werden, da die oberen Normgrenzen im Harn überschritten werden könnten. Ein Verzicht auf Kaffee und Ananas in normalen Mengen ist nicht erforderlich. Es besteht kein Anlaß, weiterhin die bisherigen umfangreichen Restriktionen der übrigen Nahrungsmittel beizubehalten.