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Nutritional CRO & Prüflabor


BioTeSys publiziert regelmäßig wissenschaftliche Artikel zu unterschiedlichen Themen aus dem Umfeld der Prüfung und wissenschaftlichen Absicherung von biologischen und chemischen Produkten.

Publikation: 01. Dezember 2007

The application of normal, SV40 T-antigen-immortalised and tumour-derived oral keratinocytes, under serum-free conditions, to the study of the probability of cancer progression as a result of environmental exposure to chemicals

In vitro models are currently not considered to be suitable replacements for animals in experiments to assess the multiple factors that underlie the development of cancer as a result of environmental exposure to chemicals. An evaluation was conducted on the potential use of normal keratinocytes, the SV40 T-antigen-immortalised keratinocyte cell line, SVpgC2a, and the carcinoma cell line, SqCC/Y1, alone and in combination, and under standardised serum-free culture conditions, to study oral cancer progression.

Publikation: 10. November 2006

Vitamin A and beta-carotene supply of women with gemini or short birth intervals: a pilot study

An adequate supply of vitamin A during pregnancy and breastfeeding plays an important role for development of foetus and neonate, especially in lung development and function. Aim of this pilot study was to analyze vitamin A and beta-carotene status and to investigate the contribution of nutrition to the vitamin A and beta-carotene supply in mother-infant pairs of gemini or births within short birth intervals.

Publikation: 01. November 2006

Comparison of the relative bioavailability of different coenzyme Q10 formulations with a novel solubilizate (Solu Q10)

The relative bioavailability of coenzyme Q10 (CoQ10) is markedly influenced by its delivery systems. The aim of this study was to compare four standard CoQ10 supplements available on the market with a novel solubilizate formulation of CoQ10 (Solu Q10). Pharmacokinetic parameters were assessed in 54 healthy volunteers after single and multiple intakes of 60 mg CoQ10 over a time period of 14 days.

Publikation: 01. Oktober 2006

Fenugreek+micronutrients: Efficacy of a food supplement against hair loss

Hair loss, hair thinning, poorly growing hair and powerless or dull hair are common complaints in clinical dermatology. There is a need for products, which support the hair growing process and control some of the disturbances in the hair cycle dynamics. In context of a randomised, placebo-controlled clinical trial efficacy of a fenugreek seeds containing food supplement against hair loss is evaluated. The results indicate a successful treatment of low to moderate hair loss in women and men. Additionally, positive effects on hair growth were demonstrated.

Publikation: 28. März 2006

An interlaboratory comparison of methods used to assess antioxidant potentials

Many analytical methods are used to measure the antioxidative activity of substances yet little is known about the comparability of the test results between laboratories. After an initial evaluation of a broad range of methods conducted by one laboratory, the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay, the trolox equivalent antioxidant capacity (TEAC) assay, the lipid assay (or 2,2'-azobis(2-aminepropane) (ABAP) assay) and the thiobarbituric acid (TBA) assay were selected to be evaluated in the interlaboratory study.

Publikation: 21. September 2005

A new Coenzyme Q10 tablet-grade formulation (all-Q) is bioequivalent to Q-Gel and both have better bioavailability properties than Q-SorB

Commercial Coenzyme Q10 (CoQ10, ubiquinone) formulations are often of poor intestinal absorption. We investigated the bioavailability of DSM Nutritional Products Ltd. (Kaiseraugst, Switzerland) CoQ10 10% TG/P (all-Q), a new tablet-grade formulation, with CoQ10 Q-Gel Softsules based on the Bio-Solv technology (Tishcon Corp., Salisbury, MD; marketed by Epic4Health, Smithtown, NY) and Q-SorB (Nature's Bounty, Bohemia, NY). Twelve healthy male subjects participated in a randomized, three-period crossover bioequivalence study. Plasma CoQ10 was determined from pre-dose until +36 hours.

Publikation: 11. Juni 2005

In vitro reproduction of clinical hallmarks of eczematous dermatitis in organotypic skin models

Dermatitis is a group of highly pruritic chronic inflammatory skin diseases which represents a major public-health problem worldwide. The prevalence of dermatitis has increased in recent years affecting up to 20% of the general population. Acute skin lesions are characterized by extensive degrees of intercellular edema of the epidermis (spongiosis) and a marked perivenular inflammatory cell infiltrate in the dermis. Keratinocytes within eczematous lesions exhibit a modified expression of proinflammatory cytokines, chemokines and cell-surface molecules. The pathophysiological puzzle of dermatitis is far from being elucidated completely, but skin infiltration of activated memory/effector T cells are thought to play the pivotal role in the pathogeneses. The aim of this study was the set-up of organotypic models mimicking the symptoms of eczematous dermatitis to provide a tool for therapeutic research in vitro.

Publikation: 01. Dezember 2004

Pilot study on the effect of parenteral vitamin E on ischemia and reperfusion induced liver injury: a double blind, randomized, placebo-controlled trial

Liver surgery usually involves ischemia and reperfusion (I/R) which results in oxidative stress and cell damage. The administration of antioxidants should diminish or prevent this damage. The purpose of this study was to investigate the effect of the antioxidant vitamin E on I/R injury. We carried out a placebo-controlled double-blind study on 68 patients undergoing elective, tumor-related, partial liver resection. 47 patients were qualified for the per protocol population based evaluation. The patients were randomly assigned to two groups.

Publikation: 01. November 2004

Determination of the antioxidant capacity of an antioxidant combination using the fluoroscan assay in vitro and visualization of its effects using histological methods

The effects of a well-defined combination of antioxidants on oxidative stress were investigated in vitro using classical techniques together and its protective effects against UV damage were investigated using a newly developed skin model.