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Synonyms: sibeprenlimab-szsi | VIS-649 | VIS649 | Voyxact®
sibeprenlimab is an approved drug
Compound class:
Antibody
Comment: Sibeprenlimab (VIS-649) is a fully humanized IgG2κ monoclonal antibody that targets the B-cell growth factor APRIL (TNFSF13) [2,5]. The antibody binds with high affinity to human trimeric APRIL, and potently blocks APRIL binding to its receptors TACI (transmembrane activator and CAML interactor) and BCMA (B-cell maturation antigen). APRIL mediates antibody class switching in mature B cells and promotes plasma-cell survival. APRIL acts to elevate production of IgA and pathogenic galactose-deficient IgA1, by mediating class switching in mature B cells and promoting plasma-cell survival. Galactose-deficient IgA1 is a key driver of the IgA nephropathy pathology. Hence targeting APRIL is considered as a mechanism to reduce IgA-mediated kidney damage.
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Classification ![]() |
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| Compound class | Antibody |
| Approved drug? | Yes. US FDA (2025) |
International Nonproprietary Names ![]() |
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| INN number | INN |
| 11575 | sibeprenlimab |
Synonyms ![]() |
| sibeprenlimab-szsi | VIS-649 | VIS649 | Voyxact® |
Database Links ![]() |
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| Specialist databases | |
| IMGT/mAb-DB | 1144 |
| Other databases | |
| GtoPdb PubChem SID | 472319224 |
| Search PubMed clinical trials | sibeprenlimab |
| Search PubMed titles | sibeprenlimab |
| Search PubMed titles/abstracts | sibeprenlimab |