2021
DOI: 10.3390/v13030471
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Exploring the Human Cytomegalovirus Core Nuclear Egress Complex as a Novel Antiviral Target: A New Type of Small Molecule Inhibitors

Abstract: Nuclear egress is an essential process in the replication of human cytomegalovirus (HCMV), as it enables the migration of newly formed viral capsids from the nucleus into the cytoplasm. Inhibition of the HCMV core nuclear egress complex (core NEC), composed of viral proteins pUL50 and pUL53, has been proposed as a potential new target for the treatment of HCMV infection and disease. Here, we present a new type of small molecule inhibitors of HCMV core NEC formation, which inhibit the pUL50-pUL53 interaction at… Show more

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Cited by 11 publications
(22 citation statements)
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References 31 publications
(70 reference statements)
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“…Such an antiviral MoA might be achieved by the identification of small molecules that either block the pUL97 recognition of specific substrates or interfere with pUL97–cyclin binding. As far as the latter point is concerned, our initial screening experiments, using small molecules derived from the Prestwick Chemical Library ® of approved drugs, provided experimental evidence that inhibitors with the potential to block HCMV-specific protein interactions can display strong antiviral activity [ 60 , 61 ]. This strategy might similarly be adapted to the screening of sterical inhibitors of pUL97–cyclin assembly.…”
Section: Discussionmentioning
confidence: 99%
“…Such an antiviral MoA might be achieved by the identification of small molecules that either block the pUL97 recognition of specific substrates or interfere with pUL97–cyclin binding. As far as the latter point is concerned, our initial screening experiments, using small molecules derived from the Prestwick Chemical Library ® of approved drugs, provided experimental evidence that inhibitors with the potential to block HCMV-specific protein interactions can display strong antiviral activity [ 60 , 61 ]. This strategy might similarly be adapted to the screening of sterical inhibitors of pUL97–cyclin assembly.…”
Section: Discussionmentioning
confidence: 99%
“…The validation of the NEC as an efficient target for small molecules exerting antiviral activity, has been achieved by several ways. These experiments included deletion and replacement mutants in NEC binding studies, recombinant viruses, experimental knock-down models, inhibitory peptides, NEC-directed small molecules, and some more [ 42 , 103 , 123 , 124 , 125 ]. A key point in this direction may have been the screening analysis using the Prestwick Chemical Library ® that contains a selection of pharmacologically valuable compounds and approved drugs [ 123 , 124 ].…”
Section: Validation Of the Nec As A Unique Target Of Anti-herpesviral...mentioning
confidence: 99%
“…These experiments included deletion and replacement mutants in NEC binding studies, recombinant viruses, experimental knock-down models, inhibitory peptides, NEC-directed small molecules, and some more [ 42 , 103 , 123 , 124 , 125 ]. A key point in this direction may have been the screening analysis using the Prestwick Chemical Library ® that contains a selection of pharmacologically valuable compounds and approved drugs [ 123 , 124 ]. The results of these studies provided a proof-of-concept that an inhibitory compound such as merbromin (MBM) that prevents the formation of the HCMV core NEC has the potential to block further processing of nuclear egress, eventually resulting in an intranuclear trapping of viral capsids.…”
Section: Validation Of the Nec As A Unique Target Of Anti-herpesviral...mentioning
confidence: 99%
“…It should also be mentioned, however, that an effect similar to MBV was not reproducibly obtained for other known inhibitors of viral nuclear egress, such as the recently identified core NEC-interfering small molecule merbromin (MBM; [ 13 , 39 ]). For MBM, the data obtained with the qPCR-based nuclear egress assay did not show unequivocal and robust indication for NEC-inhibitory activity (data not shown).…”
Section: Resultsmentioning
confidence: 99%