Abstract:
:Interleukin (IL)-7 is a cytokine inducing the Janus Kinase (JAK)/Signal Transducer and Activator of Transcription (STAT) pathway. As a consequence of IL-7 activating this pathway, STAT5 is phosphorylated. In pharmaceutical quality control, the potency of biopharmaceuticals is commonly assessed by proliferation assays. This is also possible for IL-7 conjugates. However, the disadvantage of these classical "endpoint-assays" is that they require very long incubation times, up to several days, since they measure the downstream events of a cellular response. As an alternative to this, we developed a rapid intracellular phosphorylation assay, measuring IL-7 induced STAT5 phosphorylation in Kit 225 cells. The Kit 225 human T cell line expresses the IL-7 receptor and is responsive to IL-7, therefore making it a good candidate cell line for assay development. Like the Kinase receptor activation (KIRA) assay, developed by Sadick et al. [1], the STAT5 phosphorylation assay was performed using two separate microtiter plates: the first one for cell stimulation and lysis, the second one for enzyme-linked immuno sorbent assay (ELISA). The assay showed a high accuracy and precision with a mean recovery of 102% and a mean coefficient of variation of 9%. In comparison to the classical proliferation assay, the phosphorylation assay is much faster. Thus, the assay procedure time can at least be reduced from six to three days by using STAT5 phosphorylation instead of proliferation as an endpoint due to the shorter incubation time with IL-7. Moreover, the phosphorylation assay shows a wider dynamic range and higher signal to noise ratios and is thus more robust than the proliferation assay.mAs a consequence, this assay could serve as reliable, accurate, precise and fast alternative to the classical proliferation assay for IL-7. This study also serves as an example for the typical steps during development and qualification / validation of a potency assay for quality control testing.
journal_name
Curr Pharm Biotechnoljournal_title
Current pharmaceutical biotechnologyauthors
Zumpe C,Engel K,Wiedemann N,Metzger AU,Pischetsrieder M,Bachmann CLdoi
10.2174/138920111798357294subject
Has Abstractpub_date
2011-10-01 00:00:00pages
1580-8issue
10eissn
1389-2010issn
1873-4316pii
BSP/CPB/E-Pub/000208-12-15journal_volume
12pub_type
杂志文章abstract::Many theoretical models of molecular interactions, biochemical and chemical reactions are described on the single-molecule level, although our knowledge about the biochemical/chemical structure and dynamics primarily originates from the investigation of many-molecule systems. At present, there are four experimental pl...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章
doi:10.2174/1389201043376986
更新日期:2004-04-01 00:00:00
abstract::The metastatic cascade and colonization remains a major challenge in clinical therapeutics. The formation of metastasis has many rate limiting steps. The expression of metastases initiation genes in primary tumors is driven by the need for cell motility, invasiveness, handling the shear stress in the vasculature and l...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/138920111798376996
更新日期:2011-11-01 00:00:00
abstract::Better understanding of protein higher order structures (HOS) is of major interest to researchers in the field of biotechnology and biopharmaceutics. Monitoring a protein's HOS is crucial towards understanding the impact of molecular conformation on the biotechnological application. In addition, maintaining the HOS is...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章
doi:10.2174/1389201011314020010
更新日期:2013-01-01 00:00:00
abstract:PURPOSE:Advanced gastrointestinal stromal tumours (GISTs) are treated with tyrosine kinase inhibitors, which also have antiangiogenic properties. Dual-energy CT (DECT) allows to acquire semi-quantitative iodine images which might correlate with blood pool and tumor vascularity. In this feasibility-study, we correlated ...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章
doi:10.2174/138920111795164066
更新日期:2011-04-01 00:00:00
abstract::As sessile and filter-feeding metazoans, marine sponges represent an ecologically important and highly diverse component of marine benthic communities throughout the world. It has been suggested that marine sponges are hosts to many microorganisms which can constitute up to 40-60% of its biomass. Recently, sponges hav...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/1389201015666140711115033
更新日期:2014-01-01 00:00:00
abstract::The blood-brain barrier (BBB), which impedes drug penetration into the central nervous system, is composed of specific structures formed by brain capillary endothelial cells and sheathed by astrocytic end-feet through basement membrane. Many brain drug delivery strategies have focused on adsorptive-mediated transcytos...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/138920112803341851
更新日期:2012-09-01 00:00:00
abstract:BACKGROUND:Despite the extended laboratory and clinical study of sepsis, its diagnosis remains a clinical challenge. The initiation of sepsis activates many different biochemical and immunological pathways being expressed by alterations of various molecules in human tissues. The detection and measurement of the concent...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/1389201018666170601080111
更新日期:2017-01-01 00:00:00
abstract::Coagulase-negative staphylococci (CoNS) are part of the microbiota of human skin and rarely linked with soft tissue infections. In recent years, CoNS species considered as one of the major nosocomial pathogens and can cause several infections such as catheter-acquired sepsis, skin infection, urinary tract infection, e...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/1389201021666200423110359
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND:Although Semaphorin 3A (Sema3A)/ Neuropilin-1(NRP1)/Plexin A1 is one of the important targets in bone metabolism, few studies are done on this target in the glucocorticoids-induced osteoporosis. Luteolin is a chemical component of Honeysuckle and it has various bioactivities. The effect and study of Luteolin...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章
doi:10.2174/1389201021666201216150442
更新日期:2020-12-16 00:00:00
abstract::Several of the 28 mammalian transient receptor potential (TRP) channel subunits are expressed throughout the alimentary canal where they play important roles in taste, chemo- and mechanosensation, thermoregulation, pain and hyperalgesia, mucosal function and homeostasis, control of motility by neurons, interstitial ce...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/138920111793937862
更新日期:2011-01-01 00:00:00
abstract::Immuno-isolation provides a potentially safe and effective method of delivering recombinant therapeutic molecules. Its application as a drug-delivery platform for the treatment of cancer has shown promising developments recently. This review will summarize the principle and current progress of this novel therapy parad...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/1389201013378680
更新日期:2001-09-01 00:00:00
abstract:PURPOSE:The work was performed to investigate the feasibility of preparing ocular inserts loaded with Poly-ε-Caprolactone (PCL) nanoparticles as a sustained ocular delivery system. METHODS:First, Atorvastatin Calcium-Poly-ε-Caprolactone (ATC-PCL) nanoparticles were prepared and characterized. Then, the optimized nanop...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章
doi:10.2174/1389201021666200519133350
更新日期:2020-01-01 00:00:00
abstract:AIM OF THE STUDY:To assess tramadol and O-desmethyltramadol (M1) concentrations and their correlations with analgesia in patients with cancer pain. PATIENTS AND METHODS:Thirty opioid-naive patients with nociceptive pain intensity on VAS (visual analogue scale) > 40 received controlled-release tramadol as the first (15...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章
doi:10.2174/138920111794295738
更新日期:2011-02-01 00:00:00
abstract::A variety of methods including penetrating enhancers, enzyme inhibitors, as well as cargo mediated drug delivery have been explored to improve the intolerance of parenteral administrated insulin, but little success has been achieved so far. Under this background, cell penetrating peptides (CPPs), with their ability to...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/1389201015666140813125840
更新日期:2014-01-01 00:00:00
abstract:BACKGROUND:In Saudi Arabia, the incidence and mortality rates of breast cancer are high. Although current treatments are effective, breast cancer cells develop resistance to these treatments. Numerous studies have demonstrated that active compounds in plant extracts, such as the phenolic compound Rosmarinic Acid (RA), ...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章
doi:10.2174/1389201021666200318114817
更新日期:2020-01-01 00:00:00
abstract::Chitin and chitosan derivatives are used as excipients and drug carriers in the pharmaceutical field. Their derivatization contributed to expansion of application and decrease toxicity. Chitosan is used as an excipient in oral dosage form. Chitosan tablet can exhibit a sustained drug release compared to commercial pro...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/1389201033489748
更新日期:2003-10-01 00:00:00
abstract::Until recently, most research efforts aimed at developing anti-cancer tools were focusing on small molecules. Alternative compounds are now being increasingly assessed for their potential anti-cancer properties, including peptides and their derivatives. One earlier limitation to the use of peptides was their limited c...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/138920111796117337
更新日期:2011-08-01 00:00:00
abstract::3,4-Methylenedioxymethamphetamine (MDMA or ecstasy) is a worldwide illegally used amphetamine-derived designer drug known to be hepatotoxic to humans. Jaundice, hepatomegaly, centrilobular necrosis, hepatitis and fibrosis represent some of the adverse effects caused by MDMA in the liver. Although there is irrefutable ...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/138920110791591535
更新日期:2010-08-01 00:00:00
abstract::Lipid nanocapsules (LNCs) were designed more than 15 years ago to deliver lipophilic drugs to cells with non toxic excipients by mimicking lipoproteins. During the last 5 years these promising nanocarriers were re-designed to deliver nucleic acids to cancer cells. This short review sums up the features of LNCs and des...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/1389201017666160401145206
更新日期:2016-01-01 00:00:00
abstract::SARS-CoV 2 is a novel virus strain of Coronavirus, reported in China in late December 2019. Its highly contagious nature in humans has prompted WHO to designate the ongoing pandemic as a Public Health Emergency of International Concern. At this moment, there is no specific treatment and the therapeutic strategies to d...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章
doi:10.2174/1389201021666200807111359
更新日期:2020-08-06 00:00:00
abstract::The biliary secretion of bile acids is critical for multiple liver functions including digesting fatty nutrients and driving bile flow. When this process is impaired, the accumulating bile acids cause inflammatory liver injury. Multiple ABC transporters in the liver are key players to safeguard the hepatocyte and avoi...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/138920111795163986
更新日期:2011-04-01 00:00:00
abstract::In many signaling pathways, various factors have been isolated by molecular genetic studies and wholegenome analysis. Understanding the interactions among these factors is crucial to understanding the signaling process as a whole. Recent studies on auxin signaling in the regulation of plant growth and development have...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/138920101314151120122745
更新日期:2012-11-01 00:00:00
abstract::CNS disorders are the third major problem of health in developed countries, with approximately 10% of direct costs associated with a pharmacological treatment of doubtful cost-effectiveness. There is an alarming abuse of psychotropic drugs worldwide and only 20-30% of patients with CNS disorders appropriately respond ...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/138920112799857576
更新日期:2012-04-01 00:00:00
abstract::Apolipoprotein M (apoM) has been suggested to play a role in reverse cholesterol transport. Here we studied the influence of liver X-receptor (LXR) agonist on the transcriptional regulation of apoM. Studies were performed in murine liver and intestinal mucosal cells in vivo and in human intestinal Caco-2 cells in vitr...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章
doi:10.2174/138920108786786376
更新日期:2008-12-01 00:00:00
abstract::Proliposomes are phospholipid based drug delivery systems that are finding important applications in the field of pharmaceutics. Proliposomes have been extensively studied as a potential carrier for oral delivery of drugs with poor bioavailability, but the mechanism of absorption and cellular uptake pathways has not y...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/1389201016666150118134256
更新日期:2015-01-01 00:00:00
abstract::Signals relayed through G protein-coupled receptors (GPCR) play pivotal roles in human physiology and are important drug targets. About 40% of all GPCRs couple to the heterotrimeric G protein Gq. Biochemical studies as well as crystallography have improved our understanding of GqPCRs and their downstream partners. Her...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/1389201015666140922101637
更新日期:2014-01-01 00:00:00
abstract::Celiac Disease (CD) is an immune-mediated enteropathy, generally of the proximal intestine, that occurs in genetically susceptible individuals triggered by the ingestion of gluten. The incidence and frequency of CD are increasing, and it is predicted that CD affects approximately 1% of the people worldwide. The common...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/1389201021666191219160729
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND:Alfalfa and red clover are the most widespread and most important perennial legumes, primarily used as a high-quality feed for livestock. Both alfalfa and red clover, as well as some other plant species from Fabaceae family, are a rich natural source of phytoestrogens, nonsteroidal compounds with an estrogen...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/1389201019666180730165917
更新日期:2018-01-01 00:00:00
abstract::We have developed a high-pH, pH-shift refolding "Ph-Fold technology", both for academic research and industrial protein drug development applications. Using this technology, we were able to refold some "difficult-to-refold" proteins, some of which are proven important drug targets and protein drug candidates. The tech...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章
doi:10.2174/138920110791111906
更新日期:2010-04-01 00:00:00
abstract::The clinical recognition and adequate treatment of women with hyperglycemia during pregnancy is significant in order to reduce neonatal complications correlated with gestational diabetes mellitus (GDM). The traditional management of pregnant patients with GDM in whom diet restriction is not sufficient enough involves ...
journal_title:Current pharmaceutical biotechnology
pub_type: 杂志文章,评审
doi:10.2174/1389201015666140330200254
更新日期:2014-01-01 00:00:00