Further examples of applications of our biophysical techniques can be
obtained through links below to Adobe Acrobat .pdf format versions of published
articles and posters or talks we have presented at various meetings. Our review article about SEC-MALS
is also included. These are listed in reverse chronological order.
"New Approaches to Investigating the Self-Association and Colloidal Stability of
Protein Pharmaceuticals at High Concentrations", Philo, J.S. & Maluf, N.K.,
poster, WCBP 2015
Reversible Self-Association of Biopharmaceuticals using AUC and Light Scattering",
Philo, J.S., invited talk, Higher Order Structure meeting 2014
Association of a Monoclonal Antibody Studied by Concentration-Gradient Light
Scattering (CG-MALS) and Sedimentation Velocity (SV-AUC)", Philo, J.S., poster, Higher
Order Structure meeting, 2013
critical role of mobile phase composition in size exclusion chromatography of
protein pharmaceuticals". Arakawa, T., Ejima, D., Li, T., and Philo, J. S.
(2010). J. Pharm. Sci. 99, 1674-1692. [A PDF file is
available, but by request only (use the Contact form,
and be specific about which article you want).]
June 2009 issue of Current Pharmaceutical Biotechnology (vol. 10 #4)
contains 6 articles and an editorial by APL staff
on mechanisms of protein aggregation, aggregate detection, and aggregate
prevention. [PDF files are available, but by request only (use
the Contact form, and be specific about which
articles you want).]
in measuring comparability of aggregation and conformation for biosimilars (and
often innovator products too!)", poster, WCBP 2009
on aggregation: types, causes, characterization, and impact", invited talk,
Comparability for Biotherapeutics, Berlin June 2007
[Note: this 3-part series below is a good
starting point for those wanting to know more about analytical methods for
analysis of therapeutic proteins, part 3: Principles and optimization of
field-flow fractionation (FFF)". Arakawa, T., Philo, J. S., Ejima, D.,
Sato, H., and Tsumoto, K. (2007). Bioprocess International 5 (10), 52-70.
analysis of therapeutic proteins, part 2: Analytical ultracentrifugation and
dynamic light scattering". Arakawa, T., Philo, J. S., Ejima, D., Tsumoto,
K., and Arisaka, F. (2007). Bioprocess International 5 (4), 36-47.
analysis of therapeutic proteins, part 1: General aspects and techniques for
assessment". Arakawa, T., Philo, J. S., Ejima, D., Tsumoto,
K., and Arisaka, F. (2006). Bioprocess International 4 (10), 42-49.
Monitoring the homogeneity of adenovirus preparations (a gene therapy
delivery system) using analytical ultracentrifugation. Berkowitz, S. A. and
Philo, J. S. (2007). Anal. Biochem. 362, 16-37. [A PDF
file is available, but by request only (use the
Contact form, and be specific about which article you want).]
"Is Any Measurement Method Optimal for All
Aggregate Sizes and Types?", Philo, J.S. (2006) AAPS Journal. 8(3): E564-E571.
"Analyzing Aggregates by Sedimentation
Velocity and Light Scattering", invited talk, AAPS National
Biotechnology Meeting, 2006
"Some Unusual Aggregation Phenomena in
Recombinant Proteins", poster, WCBP 2006
"Sensitivity and Reproducibility of Protein
Aggregate Analysis by Sedimentation Velocity", poster, WCBP 2005
"Analyzing Aggregates of Different Sizes
and Types: SEC vs. Analytical Ultracentrifugation vs. Light
Scattering", invited talks, WCBP and IBC Well Characterized Biologicals,
"Measuring Comparability of Conformation,
Heterogeneity, and Aggregation with Circular Dichroism and Analytical
Ultracentrifugation", invited talk, State of the Art Methods for the
Characterization of Biological Products and Assessment of Comparability, NIH,
the aggregation and conformation of protein therapeutics", Philo, J. S.
(2003), Amer. Biotech. Lab. 21, 22-26.
"Limitations and Advantages in Assessing
Adenovirus Homogeneity by Laser Light Scattering and Analytical
Ultracentrifugation - Measuring the Aggregation of Large Biopharmaceuticals",
invited talk, Steve Berkowitz (Biogen-Idec) and John Philo, WCBP 2003
"Some Biophysical Tools for
Demonstrating Comparability of Conformation and Aggregation",
poster, WCBP 2002
Thermodynamic Analysis of Thermal Unfolding of Recombinant Erythropoietin", Biosci.
Biotechnol. Biochem. 65, 121-1327, 2001
"Online Size-Exclusion High-Performance
Liquid Chromatography Light Scattering and Differential Refractometry Methods to
Determine Degree of Polymer Conjugation to Proteins and Protein-Protein or
Protein-Ligand Association States", B.S. Kendrick, B.S. Kerwin, B.
Chang, and J.S. Philo (2001) Anal. Biochem. 299, 136-146
"New Software Methods Enhance
Sedimentation Velocity Analysis of Protein Aggregation and Conformation",
poster, WCBP 2001
"Analysis of Aggregation, Stability,
and Lot Comparability by Sedimentation Velocity", poster, WCBP 2000
"Effects of Additives on
Reversibility of Thermal Unfolding", poster, WCBP 2000
"Size-Exclusion Chromatography with On-Line
Light-Scattering, Absorbance, and Refractive Index Detectors for Studying
Proteins and Their Interactions" [review article, 170+ citations] J.
Wen, T. Arakawa and J. S. Philo (1996) Anal. Biochem. 240, 155–166.