tetano
Editor, Senior Moderator
J Virol Methods. 2018 Oct 19. pii: S0166-0934(18)30063-6. doi: 10.1016/j.jviromet.2018.10.013. [Epub ahead of print]
[h=1]Stability of retroviral pseudotypes carrying the hemagglutinin of avian influenza viruses under various storage conditions.[/h] Delgadillo-Guti?rrez K[SUP]1[/SUP], Ribas-Aparicio RM[SUP]1[/SUP], Jim?nez-Alberto A[SUP]1[/SUP], Aparicio-Ozores G[SUP]1[/SUP], Castel?n-Vega JA[SUP]2[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] Retroviral pseudotypes are broadly used as safe instruments to mimic the structure and surface of highly pathogenic viruses. They have been employed for the discovery of new drugs, as diagnostic tools in vaccine studies, and part of serological assays. Because of their widespread use in research and their potential as tools for quality control, it is important to know their shelf life, stability, and best storage conditions. In this study, we produced pseudotypes carrying the lacZ reporter gene and the hemagglutinin (HA) of avian influenza virus subtypes H5 and H7 to investigate their stability under various storage conditions. We produced pseudotypes with titers of approximately 10[SUP]6[/SUP] RLU/mL, which decreased to 10[SUP]5[/SUP] - 10[SUP]6[/SUP] RLU/mL after short-term storage at 4 ?C (up to 4 weeks). Stability was maintained after long-term storage at -20 ?C (up to 12 months), even under storage variations such as freeze-thaw cycles. We conclude that, although the titers decreased by 1 log[SUB]10[/SUB] under the different storage conditions, the remaining titers can be readily applicable in many techniques, such as neutralization assays. These findings show that large quantities of retroviral pseudotypes can be safely stored for short- or long-term use, allowing standardization and reduced variation in assays involving retroviral pseudotypes.
[h=4]KEYWORDS:[/h] Retroviral pseudotypes; avian influenza; hemagglutinin; neutralization assay
PMID: 30347199 DOI: 10.1016/j.jviromet.2018.10.013
[h=1]Stability of retroviral pseudotypes carrying the hemagglutinin of avian influenza viruses under various storage conditions.[/h] Delgadillo-Guti?rrez K[SUP]1[/SUP], Ribas-Aparicio RM[SUP]1[/SUP], Jim?nez-Alberto A[SUP]1[/SUP], Aparicio-Ozores G[SUP]1[/SUP], Castel?n-Vega JA[SUP]2[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] Retroviral pseudotypes are broadly used as safe instruments to mimic the structure and surface of highly pathogenic viruses. They have been employed for the discovery of new drugs, as diagnostic tools in vaccine studies, and part of serological assays. Because of their widespread use in research and their potential as tools for quality control, it is important to know their shelf life, stability, and best storage conditions. In this study, we produced pseudotypes carrying the lacZ reporter gene and the hemagglutinin (HA) of avian influenza virus subtypes H5 and H7 to investigate their stability under various storage conditions. We produced pseudotypes with titers of approximately 10[SUP]6[/SUP] RLU/mL, which decreased to 10[SUP]5[/SUP] - 10[SUP]6[/SUP] RLU/mL after short-term storage at 4 ?C (up to 4 weeks). Stability was maintained after long-term storage at -20 ?C (up to 12 months), even under storage variations such as freeze-thaw cycles. We conclude that, although the titers decreased by 1 log[SUB]10[/SUB] under the different storage conditions, the remaining titers can be readily applicable in many techniques, such as neutralization assays. These findings show that large quantities of retroviral pseudotypes can be safely stored for short- or long-term use, allowing standardization and reduced variation in assays involving retroviral pseudotypes.
[h=4]KEYWORDS:[/h] Retroviral pseudotypes; avian influenza; hemagglutinin; neutralization assay
PMID: 30347199 DOI: 10.1016/j.jviromet.2018.10.013