Drug Development

Predicting the flow characteristics of powders during manufacture is especially important for the pharmaceutical engineer. Getting the powder flow wrong can be highly disruptive to plant performance and productivity, particularly where equipment has to be taken off-line and stripped down for cleaning out blockages. The flow behaviour of the individual ingredients may be well known, but as these are blended and reacted their flow properties can change.

Cells function as highly accurate quality control (QC) machines to ensure that only correctly folded proteins are released into the physiological milieu to perform their designated functions. The efficient removal of damaged or incorrectly folded/misfolded proteins at the correct time keeps a cell viable and functioning.

Reflecting strong growth prospects for certain biologic-based drugs, the biotechnology and pharmaceutical majors are proceeding with a strategy of expanding their internal manufacturing networks and partnering with select contract manufacturing organizations (CMOs).

Boston, MA (May 8)-The global biotechnology industry showed several positive signs in 2006, including increases in overall revenues and financing, although the industry as a whole continues to operate at a loss, according to Ernst & Young's annual analysis of the biotechnology industry.

Excipients facilitate formulation design and perform a wide range of functions to obtain desired properties for the finished drug product. The article reviews excipient development and functionality of these materials, including their importance in formulation design, potential processing challenges directly related to excipients, and therapeutic benefits.

The pharmaceutical majors build their capabilities in peptide technology, and contract manufacturers expand to meet growing demand for bulk peptides.

There is a tremendous need to enhance delivery of potential therapeutics to the brain for treatment of central nervous system (CNS) disorders. The blood brain barrier (BBB) restricts and controls the exchange of compounds between the CNS and the blood, which requires discovery of new modalities allowing for effective drug delivery to the CNS. Polymer nanotechnology has now become one of the most attractive areas of pharmaceutical research. This review focuses on the current progress in polymeric nanoparticles, where the specific arrangement of the polymeric matter at the nanoscale is utilized to design drug delivery systems that provide safe and efficient transport of CNS drugs across the BBB.

This article discusses a number of factors that may influence the behaviour of conjugated biopharmaceuticals. Optimizing bioconjugation processes may be critical to achieve the desired drug performance.

One of the major concerns with introducing PAT, however, is that the bias towards process engineering may not ultimately lead to complete control of product quality.

Green chemistry involves redesigning processes so that more of the raw material ends up in the product, rather than as waste...

San Juan, PR (Apr. 25)-Regulatory and quality issues were prominent discussion topics at this year?s ExcipientFest conference and exhibition.

Interphex, New York, NY (Apr. 24)-Although the second revision of 21 CFR Part 11, the Electronic Records and Signatures Rule, has not been finalized, there is some progress being made. This was the topic of a presentation given by John English, manager of computer system validation for BE&K BioPharm at today?s Interphex Pharmaceutical Manufacturing Conference and Exhibition.

Brussels, Belgium (Mar. 22)-The European Commission?s (EC) Directorate-General for Enterprise and Industry (Brussels, Belgium) is asking manufacturers, distributors, and users of human-pharmaceutical excipients to participate in an online questionnaire on the effect of various policy options. Responses will be used to prepare a directive on good manufacturing practices (GMPs) for certain excipients.

The authors prepared and tested press-coated tablets with various weight ratios of ethylcellulose to hydroxypropylcellulose (HPC) and various ratios of two different batches of HPC as an outer coating shell and fillers in core tablets. The tablets were examined for changes in time lag and release patterns of salbutamol sulfate.

Hydrogels are biocompatible drug delivery systems by which the physical properties can be controlled by the cross-linking density. Hydrogels were prepared by copolymerization of acrylic acid monomers in the presence of poly(ethylene glycol)(PEG) to form polyethylene diacrylate (PEDGA). Various molecular weights of PEGs were used for the synthesis of PEGDA to study the effect of molecular weight of PEG on the properties of hydrogels. These hydrogels were further characterized for free water, swelling behavior, water diffusion, drug loading, and drug release profile. By analyzing the swelling behavior and release pattern of the hydrogels, the authors show that these systems can be suitably used for controlled delivery of drugs.

Near-infrared (NIR) assay and content uniformity of tablets provide fast, accurate means of monitoring tablet production that are in step with FDA's process analytical technology initiative.The authors discuss the process for testing a newly released NIR tablet analyzer to determine instrument precision and accuracy using chlorpheniramine maleate tablets.The data show promising results that could relieve laboratory workload of high-performance liquid chromatography analysis and bring analysis closer to real time for process monitoring.

China creates a potential outlet for specialty excipients as its pharmaceutical market grows.

This article considers the distinction among the terms qualification, validation, and verification in the context of pharmacopeial usage.A recommendation for a standardized usage of the terms validation and verification is provided,and general requirements for validation and verification activities are given.The article also emphasizes the importance of knowing when validation or verification is necessary relative to the use of a method to satisfy pharmacopeial article requirements (for which a monograph exists in the pharmacopeia) or for nonpharmacopeial use.

Missed or late calibration dates can accumulate, and even if the equipment is labelled appropriately, it can suggest poor management of resources and priorities.

There have been significant advances, especially in understanding the role of carrier properties on the aerosol performance of the API.

When a dosage form or an API is introduced to the gastrointestinal tract, or dissolution media mimicking it, a transformation from a metastable to a more stable form with lower solubility and bioavailability is possible.

Buffalo, NY (Mar. 7)-Scientists at the University at Buffalo?s Institute for Lasers, Phtonics, and Biophotonics and Roswell Park Cancer Institute have developed a drug delivery system comprising 100-nm nanocrystals of pure HPPH, (2-devinyl-2-1'-hexyloxyethyl pyropheophorbide).

Contraceptives that are sprayed onto the skin are under development to offer a more convenient alternative method of birth control.

Vancouver, BC, Canada-Researchers from the University of British Columbia are developing a new method for delivering Amphotericin B, a potent antifungal agent for fatal blood-borne fungal infections that currently must be administered intravenously.

Rockville, MD (Mar. 1)-Sending Warning Letters to 8 manufacturers and 12 distributors, The US Food and Drug Administration ordered a stop to the manufacture and distribution of unapproved drug products containing ergotamine tartrate.