Regarding a letter by Erika Lietzan (1) addressing our article on regulating biotechnology drugs in Colombia (2), we offer the following response. As Lietzan states, it is true that there is a global consensus on the two regulatory pathways to obtaining market authorization for biological medicines: the full dossier pathway for pioneer products and an abbreviated pathway for competitors (biosim...

BACKGROUND Administration of a biotherapeutic can result in the formation of anti-drug antibodies (ADAs). The resulting ADA can potentially form immune complexes (ICs) with the drug leading to altered pharmacokinetic (PK) profiles and/or adverse events. Furthermore the presence of such complexes may interfere with accurate PK assessment, and/or detection of ADA in immunogenicity assays. Here, w...

The computational approach is one of the newest and fastest developing techniques in pharmacokinetics, ADME (absorption, distribution, metabolism, excretion) evaluation, drug discovery and toxicity. However, to date, the software packages devoted to ADME prediction, especially of metabolism, have not yet been adequately validated and still require improvements to be effective. Most are ‘open’ s...

The purpose of the present study was twofold. First to characterize endpoints distinct to the reflexive responses to sensory stimuli typically used in neuropathic pain models. A second aim was to evaluate two clinically approved drugs carbamazepine (Tegretol) and pregabalin (Lyrica) against these endpoints with the purpose to backtranslate from the clinical to preclinical setting. The selected ...

AIMS SB4 has been developed as a biosimilar of etanercept. The primary objective of the present study was to demonstrate the pharmacokinetic (PK) equivalence between SB4 and European Union -sourced etanercept (EU-ETN), SB4 and United States-sourced etanercept (US-ETN), and EU-ETN and US-ETN. The safety and immunogenicity were also compared between the treatments. METHODS This was a single-bli...

antibiotics and antiviral drugs always face a threat of resistance development, which may eventually lead to therapeutic failure. Drug discovery and development is a lengthy and costly process and many drug candidates fail at the later stages of development due to poor pharmacokinetic (PK) properties, i.e., absorption, distribution, metabolism and excretion (ADME) (1). The success rate in drug ...

the aim of this study was to characterize the effect of typhoid fever on pharmacokinetic parameters of levofloxacin (lf) and compare the pharmacokinetic parameters of the said antibiotic in healthy human volunteers and patients with typhoid fever. total of 12 subjects were divided into two groups “a” (healthy volunteers) and “b” (typhoid patients). single oral dose of lf 500 mg was given and 5 ...

The bacterial plasminogen-activator staphylokinase (Sak) is a promising thrombolytic agent for treating acute myocardial infarction. To effectively reduce the immunogenicity of Sak while maintaining its fibrinolytic activity, site-specific PEGylation was performed in the present study. The chemoselective cysteine PEGylation site was selected within an immunodominant region (amino acid residues ...

Receptor occupancy (RO) assays are designed to quantify the binding of therapeutics to their targets on the cell surface and are frequently used to generate pharmacodynamic (PD) biomarker data in nonclinical and clinical studies of biopharmaceuticals. When combined with the pharmacokinetic (PK) profile, RO data can establish PKPD relationships, which are crucial for informing dose decisions. RO...