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Improving of human fragment antibodies (scFVs) specific for animals' venoms


Accidents caused by venomous animals are classified as Neglected Tropical Diseases (NTDs). Currently, the specific treatment available for severe envenoming caused by venomous animals is the use of heterologous antivenons. Although heterologous antivenoms are currently the only effective treatment available for severe envenoming, these sera present several documented undesirable problems: (i) Heterologous antivenoms may cause pyrogenic and anaphylactic reactions; (ii) Because of their heterologous nature, horse antibodies present in sera can act as antigens and activate the human immune system, resulting in the production of human anti-horse antibody antibodies; (iii) Most of these antibodies (70%) are not targeted to clinically relevant toxins, but directed against other exogenous antigens that the immunized animal encountered during its lifetime; (iv) Large numbers of heterologous antibodies combined with human anti-horse antibody antibodies can result in high production of immunocomplexes, triggering Serum Sickness. Thus, in order to avoid all such problems, the most desirable alternative would be the production of homologous, that is, fully human antibodies. The Laboratory of Molecular Immunopathology (LIM), under the responsibility of the physician and PhD José Elpidio Barbosa, has been dedicating more than a decade to the production of antivenoms consisting of fragments of human antibodies. Using Phage Display technology, the present laboratory produced scFv (single-chain fragmente variable) human antibodies to scorpion venoms - Serrumab (Tityus serrulatus), jararaca - Bothrumab (Bothrops sp), rattlesnake - Crotumab (Crotalus durissus terrificus), surucucu - Lachesumab (Lachesis muta), coral - Micrurumab (Micrurus leminiscatus) and Africanized bee - Afribumab. Today, the group represents 30% of the world's publications in the area. However, although they are already patented and / or in the process of patenting, many of them need to be improved on their affinity and format before being included in a mixture of antivenoms, aiming at a future transfer of technology and availability in the pharmaceutical market. In this context, the present project will seek to improve affinity and optimize the format of Serrumab and Afribumab antibodies. Subsequently, the improved antibodies will be used in in vitro and in vivo functional assays. (AU)

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Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CAMPOS, LUCAS B.; PUCCA, MANUELA B.; SILVA, LUCIANO C.; PESSENDA, GABRIELA; FILARDI, BRUNO A.; CERNI, FELIPE A.; OLIVEIRA, ISADORA S.; LAUSTSEN, ANDREAS H.; ARANTES, ELIANE C.; BARBOSA, JOSE E.. Identification of cross-reactive human single-chain variable fragments against phospholipases A(2) from Lachesis muta and Bothrops spp venoms. Toxicon, v. 184, p. 116-121, . (17/04724-4, 17/14035-1, 18/14158-9, 17/03580-9)
FIGUEIREDO BORDON, KARLA DE CASTRO; COLOGNA, CAMILA TAKENO; FORNARI-BALDO, ELISA CORREA; PINHEIRO-JUNIOR, ERNESTO LOPES; CERNI, FELIPE AUGUSTO; AMORIM, FERNANDA GOBBI; PINO ANJOLETTE, FERNANDO ANTONIO; CORDEIRO, FRANCIELLE ALMEIDA; WIEZEL, GISELE ADRIANO; CARDOSO, IARA AIME; et al. From Animal Poisons and Venoms to Medicines: Achievements, Challenges and Perspectives in Drug Discovery. FRONTIERS IN PHARMACOLOGY, v. 11, . (17/14035-1, 17/00586-6, 18/14158-9, 19/10173-6, 18/21233-7, 17/04724-4, 13/26619-7, 16/04761-4, 17/03580-9, 13/26200-6)
PUCCA, MANUELA B.; CERNI, FELIPE A.; JANKE, RAHEL; BERMUDEZ-MENDEZ, ERICK; LEDSGAARD, LINE; BARBOSA, JOSE E.; LAUSTSEN, ANDREAS H.. History of Envenoming Therapy and Current Perspectives. FRONTIERS IN IMMUNOLOGY, v. 10, . (17/14035-1, 18/14158-9, 17/04724-4)
PUCCA, MANUELA B.; AHMADI, SHIRIN; CERNI, FELIPE A.; LEDSGAARD, LINE; SORENSEN, V, CHRISTOFFER; MCGEOGHAN, FARRELL T. S.; STEWART, TRENTON; SCHOOF, ERWIN; LOMONTE, BRUNO; KELLER, ULRICH AUF DEM; et al. Unity Makes Strength: Exploring Intraspecies and Interspecies Toxin Synergism between Phospholipases A(2) and Cytotoxins. FRONTIERS IN PHARMACOLOGY, v. 11, . (17/04724-4, 17/14035-1, 18/14158-9)
ABREU, CAIO B.; BORDON, KARLA C. F.; CERNI, FELIPE A.; OLIVEIRA, ISADORA S.; BALENZUELA, CARLA; ALEXANDRE-SILVA, GABRIEL M.; ZOCCAL, KARINA F.; REIS, MOUZARLLEM B.; WIEZEL, GISELE A.; PEIGNEUR, STEVE; et al. Pioneering Study onRhopalurus crassicaudaScorpion Venom: Isolation and Characterization of the Major Toxin and Hyaluronidase. FRONTIERS IN IMMUNOLOGY, v. 11, . (17/00586-6, 16/04761-4, 17/04724-4, 17/03580-9, 19/10173-6, 17/14035-1, 18/21233-7)
PUCCA, MANUELA B.; CERNI, FELIPE A.; OLIVEIRA, ISADORA S.; JENKINS, TIMOTHY P.; ARGEMI, LIDIA; SORENSEN, CHRISTOFFER V.; AHMADI, SHIRIN; BARBOSA, JOSE E.; LAUSTSEN, ANDREAS H.. Bee Updated: Current Knowledge on Bee Venom and Bee Envenoming Therapy. FRONTIERS IN IMMUNOLOGY, v. 10, . (18/14158-9, 18/21233-7, 17/04724-4, 17/14035-1, 17/03580-9)

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