Details

Autor(en) / Beteiligte

• Williams, Katherine L
• Guerrero, Steve
• Flores-Garcia, Yevel
• Kim, Dongkyoon
• Williamson, Kevin S
• Siska, Christine
• Smidt, Pauline
• Jepson, Sofia Z
• Li, Kan
• Dennison, S Moses
• Mathis-Torres, Shamika
• Chen, Xiaomu
• Wille-Reece, Ulrike
• MacGill, Randall S
• Walker, Michael
• Jongert, Erik
• King, C Richter
• Ockenhouse, Christian
• Glanville, Jacob
• Moon, James E
• Regules, Jason A
• Tan, Yann Chong
• Cavet, Guy
• Lippow, Shaun M
• Robinson, William H
• Dutta, Sheetij
• Tomaras, Georgia D
• Zavala, Fidel
• Ketchem, Randal R
• Emerling, Daniel E

Titel

A candidate antibody drug for prevention of malaria

Ist Teil von

• Nature medicine, 2024-01, Vol.30 (1), p.117-129

Ort / Verlag

United States: Nature Publishing Group

Erscheinungsjahr

2024

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• Over 75% of malaria-attributable deaths occur in children under the age of 5 years. However, the first malaria vaccine recommended by the World Health Organization (WHO) for pediatric use, RTS,S/AS01 (Mosquirix), has modest efficacy. Complementary strategies, including monoclonal antibodies, will be important in efforts to eradicate malaria. Here we characterize the circulating B cell repertoires of 45 RTS,S/AS01 vaccinees and discover monoclonal antibodies for development as potential therapeutics. We generated >28,000 antibody sequences and tested 481 antibodies for binding activity and 125 antibodies for antimalaria activity in vivo. Through these analyses we identified correlations suggesting that sequences in Plasmodium falciparum circumsporozoite protein, the target antigen in RTS,S/AS01, may induce immunodominant antibody responses that limit more protective, but subdominant, responses. Using binding studies, mouse malaria models, biomanufacturing assessments and protein stability assays, we selected AB-000224 and AB-007088 for advancement as a clinical lead and backup. We engineered the variable domains (Fv) of both antibodies to enable low-cost manufacturing at scale for distribution to pediatric populations, in alignment with WHO's preferred product guidelines. The engineered clone with the optimal manufacturing and drug property profile, MAM01, was advanced into clinical development.