{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T22:34:37Z","timestamp":1791326077383,"version":"4.3.1"},"reference-count":48,"publisher":"American Society for Microbiology","issue":"11","license":[{"start":{"date-parts":[[2013,11,1]],"date-time":"2013-11-01T00:00:00Z","timestamp":1383264000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["Antimicrob Agents Chemother"],"published-print":{"date-parts":[[2013,11]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Hepatitis B virus (HBV)-associated chronic liver diseases are treated with nucleoside analogs that target the virus polymerase. While these analogs are potent, drugs are needed to target other virus-encoded gene products to better block the virus replication cycle and chronic liver disease. This work further characterized GLS4 and compared it to the related BAY 41-4109, both of which trigger aberrant HBV core particle assembly, where the virus replication cycle occurs. This was done in HepAD38 cells, which replicate HBV to high levels.\n                    <jats:italic>In vitro<\/jats:italic>\n                    , GLS4 was significantly less toxic for primary human hepatocytes (\n                    <jats:italic>P<\/jats:italic>\n                    &lt; 0.01 up to 100 \u03bcM), inhibited virus accumulation in the supernantant of HepAD38 cells (\n                    <jats:italic>P<\/jats:italic>\n                    &lt; 0.02 up to 100 nM), inhibited HBV replicative forms in the liver with a significantly lower 50% effective concentration (EC\n                    <jats:sub>50<\/jats:sub>\n                    ) (\n                    <jats:italic>P<\/jats:italic>\n                    &lt; 0.02), and more strongly inhibited core gene expression (\n                    <jats:italic>P<\/jats:italic>\n                    &lt; 0.001 at 100 to 200 nM) compared to BAY 41-4109.\n                    <jats:italic>In vivo<\/jats:italic>\n                    characterization was performed in nude mice inoculated with HepAD38 cells, which grew out as tumors, resulting in viremia. Treatment of mice with GLS4 and BAY 41-4109 showed strong and sustained suppression of virus DNA to about the same extents both during and after treatment. Both drugs reduced the levels of intracellular core antigen in the tumors. Alanine aminotransferase levels were normal. Tumor and total body weights were not affected by treatment. Thus, GLS4 was as potent as the prototype, BAY 41-4109, and was superior to lamivudine, in that there was little virus relapse after the end of treatment and no indication of toxicity.\n                  <\/jats:p>","DOI":"10.1128\/aac.01091-13","type":"journal-article","created":{"date-parts":[[2013,8,19]],"date-time":"2013-08-19T21:58:37Z","timestamp":1376949517000},"page":"5344-5354","update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":120,"title":["Preclinical Characterization of GLS4, an Inhibitor of Hepatitis B Virus Core Particle Assembly"],"prefix":"10.1128","volume":"57","author":[{"given":"Guoyi","family":"Wu","sequence":"first","affiliation":[{"name":"Department of Biology, College of Science and Technology, Temple University, Philadelphia, Pennsylvania, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of General Surgery, Lingnan Hospital of The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yingjun","family":"Zhang","sequence":"additional","affiliation":[{"name":"Sunshine Lake Pharma Co., Ltd. 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