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Araújo TG, Paiva CE, Rocha RM, Maia YCP, Sena AAS, Ueira-Vieira C, Carneiro AP, Almeida JF, de Faria PR, Santos DW, Calábria L, Alcântara TM, Soares FA, Goulart LR. A novel highly reactive Fab antibody for breast cancer tissue diagnostics and staging also discriminates a subset of good prognostic triple-negative breast cancers. Cancer Lett 2013; 343:275-85. [PMID: 24099914 DOI: 10.1016/j.canlet.2013.09.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 09/26/2013] [Accepted: 09/26/2013] [Indexed: 01/01/2023]
Abstract
The discovery of novel markers for breast cancer (BC) has been recently relied on antibody combinatorial libraries and selection through phage display. We constructed a recombinant Fab library, and after selections against BC tissues, the FabC4 clone was thoroughly investigated by immunohistochemistry in 232 patients with long-term follow-up. The FabC4 ligand was determined by mass spectrometry. The FabC4 expression was associated with younger age, lack of progesterone receptor, higher histological grades and non-luminal subtypes, and it also identified a subset of good prognostic triple-negative BCs, possibly targeting a conformational epitope of Cytokeratin-10 (CK10). This new CK10-epitope specific antibody may open new possibilities in diagnostic and therapeutic strategies.
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Affiliation(s)
- Thaise G Araújo
- Federal University of Uberlandia, Institute of Genetics and Biochemistry, Nanobiotechnology Laboratory, Campus Umuarama, Bloco 2E, Sala 248, 38400-902 Uberlandia, MG, Brazil
| | - Carlos E Paiva
- Division of Breast and Gynecological Tumors, Department of Clinical Oncology, Barretos Cancer Hospital, Barretos, SP, Brazil
| | | | - Yara C P Maia
- Federal University of Uberlandia, Institute of Genetics and Biochemistry, Nanobiotechnology Laboratory, Campus Umuarama, Bloco 2E, Sala 248, 38400-902 Uberlandia, MG, Brazil
| | - Angela A S Sena
- Federal University of Uberlandia, Institute of Genetics and Biochemistry, Nanobiotechnology Laboratory, Campus Umuarama, Bloco 2E, Sala 248, 38400-902 Uberlandia, MG, Brazil
| | - Carlos Ueira-Vieira
- Federal University of Uberlandia, Institute of Genetics and Biochemistry, Nanobiotechnology Laboratory, Campus Umuarama, Bloco 2E, Sala 248, 38400-902 Uberlandia, MG, Brazil
| | - Ana Paula Carneiro
- Federal University of Uberlandia, Institute of Genetics and Biochemistry, Nanobiotechnology Laboratory, Campus Umuarama, Bloco 2E, Sala 248, 38400-902 Uberlandia, MG, Brazil
| | - Juliana F Almeida
- Federal University of Uberlandia, Institute of Genetics and Biochemistry, Nanobiotechnology Laboratory, Campus Umuarama, Bloco 2E, Sala 248, 38400-902 Uberlandia, MG, Brazil
| | - Paulo R de Faria
- Federal University of Uberlandia, Biomedical Sciences Institute, Uberlandia, MG, Brazil
| | - Donizeti W Santos
- Obstetric Division, Internal Medicine, University Hospital, Federal University of Uberlandia, Uberlandia, MG, Brazil
| | - Luanda Calábria
- Obstetric Division, Internal Medicine, University Hospital, Federal University of Uberlandia, Uberlandia, MG, Brazil
| | - Tânia M Alcântara
- Pathology Division, Internal Medicine, University Hospital, Federal University of Uberlandia, Uberlandia, MG, Brazil
| | | | - Luiz R Goulart
- Federal University of Uberlandia, Institute of Genetics and Biochemistry, Nanobiotechnology Laboratory, Campus Umuarama, Bloco 2E, Sala 248, 38400-902 Uberlandia, MG, Brazil; University of California Davis, Dept. of Medical Microbiology and Immunology, Davis, CA, USA.
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Mendes MM, Vieira SAPB, Gomes MSR, Paula VF, Alcântara TM, Homsi-Brandeburgo MI, dos Santos JI, Magro AJ, Fontes MRM, Rodrigues VM. Triacontyl p-coumarate: an inhibitor of snake venom metalloproteinases. Phytochemistry 2013; 86:72-82. [PMID: 23141056 DOI: 10.1016/j.phytochem.2012.10.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Revised: 08/18/2012] [Accepted: 10/16/2012] [Indexed: 06/01/2023]
Abstract
Snake venom metalloproteinases (SVMPs) participate in a number of important biological, physiological and pathophysiological processes and are primarily responsible for the local tissue damage characteristic of viperid snake envenomations. The use of medicinal plant extracts as antidotes against animal venoms is an old practice, especially against snake envenomations. Such plants are sources of many pharmacologically active compounds and have been shown to antagonize the effects of some venoms and toxins. The present study explores the activity of triacontyl p-coumarate (PCT), an active compound isolated from root bark of Bombacopsis glabra vegetal extract (Bg), against harmful effects of Bothropoides pauloensis snake venom and isolated toxins (SVMPs or phospholipase A(2)). Before inhibition assays, Bg or PCT was incubated with venom or toxins at ratios of 1:1 and 1:5 (w/w; venom or isolated toxins/PCT) for 30 min at 37°C. Treatment conditions were also assayed to simulate snakebite with PCT inoculated at either the same venom or toxin site. PCT neutralized fibrinogenolytic activity and plasmatic fibrinogen depletion induced by B. pauloensis venom or isolated toxin. PCT also efficiently inhibited the hemorrhagic (3MDH - minimum hemorrhagic dose injected i.d into mice) and myotoxic activities induced by Jararhagin, a metalloproteinase from B. jararaca at 1:5 ratio (toxin: inhibitor, w/w) when it was previously incubated with PCT and injected into mice or when PCT was administered after toxin injection. Docking simulations using data on a metalloproteinase (Neuwiedase) structure suggest that the binding between the protein and the inhibitor occurs mainly in the active site region causing blockade of the enzymatic reaction by displacement of catalytic water. Steric hindrance may also play a role in the mechanism since the PCT hydrophobic tail was found to interact with the loop associated with substrate anchorage. Thus, PCT may provide a alternative to complement ophidian envenomation treatments.
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Affiliation(s)
- M M Mendes
- Instituto de Genética e Bioquímica, Universidade Federal de Uberlândia, UFU, Uberlândia, MG, Brazil.
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Costa-Cruz JM, Rocha A, Silva AM, De Moraes AT, Guimarães AH, Salomão EC, Alcântara TM. [Occurrence of cysticercosis in autopsies performed in Uberlandia, Minas Gerais, Brazil]. Arq Neuropsiquiatr 1995; 53:227-32. [PMID: 7487528 DOI: 10.1590/s0004-282x1995000200007] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
3937 autopsies were performed between 1971 and 1993 in the Serviço de Anatomia Patológica of the Hospital de Clínicas of the Fundação de Assistência, Estudo e Pesquisa de Uberlândia, Universidade Federal de Uberlândia, in Minas Gerais, Brazil. At this Service of Pathology are realized all the autopsies of the municipal district of Uberlândia. The analysis of 2862 concluded autopsy reports, of death above the age of one year, disclosed 39 cases (1.4%) of cysticercosis. The age range was 16 to 83 years and 66.6% were males; 82.1% of the patients were from Minas Gerais State, 15.4% were from Goiás State, and in one case (2.5%) the origin was not registered. From these 39 cases, 35 (89.7%) showed central nervous system involvement, isolated or in association to other clinical forms of the disease; in 9 occurred the isolated or associated cardiac form; in 4 the muscular form, isolated or associated, was found; 4 presented the isolated or associated visceral form. In only 7 (17.9%) cases, the cysticercosis was assumed to be the direct cause of the death.
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Affiliation(s)
- J M Costa-Cruz
- Departamento de Patologia, Universidade Federal de Uberlândia, Minas Gerais, Brasil
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