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1.
PDA J Pharm Sci Technol ; 63(3): 240-4, 2009.
Artigo em Inglês | MEDLINE | ID: mdl-20069797

RESUMO

Sterilizing filtration process variables can cause unpredictable results and post-filtration integrity test values that are not representative of those obtained during validation of the filtration process. This paper discusses several points to consider in sterilizing filtration designed to assure the validated process is robust and consistently yields a sterile filtrate. These points include pore- and particle-size distributions, the use and choice of prefilters, pore configuration, and the use of redundant (serial) filtration.


Assuntos
Filtração/métodos , Esterilização/métodos , Filtração/instrumentação , Tamanho da Partícula
2.
Nat Commun ; 9(1): 1645, 2018 04 25.
Artigo em Inglês | MEDLINE | ID: mdl-29695780

RESUMO

Activation of free fatty acid receptor 1 (GPR40) by synthetic partial and full agonists occur via distinct allosteric sites. A crystal structure of GPR40-TAK-875 complex revealed the allosteric site for the partial agonist. Here we report the 2.76-Å crystal structure of human GPR40 in complex with a synthetic full agonist, compound 1, bound to the second allosteric site. Unlike TAK-875, which acts as a Gαq-coupled partial agonist, compound 1 is a dual Gαq and Gαs-coupled full agonist. compound 1 binds in the lipid-rich region of the receptor near intracellular loop 2 (ICL2), in which the stabilization of ICL2 by the ligand is likely the primary mechanism for the enhanced G protein activities. The endogenous free fatty acid (FFA), γ-linolenic acid, can be computationally modeled in this site. Both γ-linolenic acid and compound 1 exhibit positive cooperativity with TAK-875, suggesting that this site could also serve as a FFA binding site.


Assuntos
Diabetes Mellitus Tipo 2/tratamento farmacológico , Hipoglicemiantes/farmacologia , Incretinas/metabolismo , Secreção de Insulina , Receptores Acoplados a Proteínas G/agonistas , Sítio Alostérico/genética , Animais , Benzofuranos/farmacologia , Benzofuranos/uso terapêutico , Cristalografia por Raios X , Diabetes Mellitus Tipo 2/metabolismo , Sinergismo Farmacológico , Células HEK293 , Humanos , Hipoglicemiantes/uso terapêutico , Insulina/metabolismo , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Endogâmicos ICR , Camundongos Knockout , Simulação de Acoplamento Molecular , Mutagênese Sítio-Dirigida , Receptores Acoplados a Proteínas G/química , Receptores Acoplados a Proteínas G/genética , Receptores Acoplados a Proteínas G/metabolismo , Proteínas Recombinantes/química , Proteínas Recombinantes/genética , Proteínas Recombinantes/metabolismo , Sulfonas/farmacologia , Sulfonas/uso terapêutico , Ácido gama-Linolênico/metabolismo
5.
Adv Biochem Eng Biotechnol ; 98: 125-41, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-16570864

RESUMO

Validation of a sterilizing filtration process is critical since it is impossible with currently available technology to measure the sterility of each filled container; therefore, sterility assurance of the filtered product must be achieved through validation of the filtration process. Validating a pharmaceutical sterile filtration process involves three things: determining the effect of the liquid on the filter, determining the effect of the filter on the liquid, and demonstrating that the filter removes all microorganisms from the liquid under actual processing conditions.


Assuntos
Biofarmácia/normas , Filtração/instrumentação , Filtração/normas , Controle de Qualidade , Bactérias , Biofarmácia/instrumentação , Biofarmácia/tendências
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