1
|
Teixeira CJR, Dos Santos BP, Saraiva CJC, Pedroza HDP, Oloris SCS, Soto-Blanco B. TLC and HPLC methods for the determination of plumbagin for the diagnosis of poisoning by Plumbago scandens L. Toxicon 2024; 239:107634. [PMID: 38307130 DOI: 10.1016/j.toxicon.2024.107634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/25/2024] [Accepted: 01/30/2024] [Indexed: 02/04/2024]
Abstract
Plumbago scandens L. (Plumbaginaceae) occurs in all regions of Brazil. It has been described as toxic to cattle and goats. Caustic lesions in the upper digestive tract characterize poisoning. P. scandens contains a naphthoquinone named plumbagin, which presents high cytotoxic activity. Plumbago auriculata Lam., a widely used ornamental plant, is considered potentially toxic, but there is limited data about its toxicity. This work aimed to validate analytical methodologies for determining the levels of plumbagin in samples of leaves, stems, and rumen content to be used as an auxiliary chemical marker in the laboratory diagnosis of intoxication. One methodology used thin layer chromatography (TLC), and another used high-performance liquid chromatography (HPLC). The presence of palisade grass (Urochloa brizantha (Hochst. ex A.Rich.) R.D.Webster), Guinea grass (Megathyrsus maximus (Jacq.) B.K.Simon & S.W.L.Jacobs), corn silage, and rumen content did not interfere with plumbagin in the two methodologies. The TLC methodology generates qualitative results but is simple to implement and has a low cost. The HPLC methodology showed a limit of detection (LOD) of 0.01 μg/mL and a limit of quantification (LOQ) of 0.05 μg/mL. Leaf and stem samples of P. scandens evaluated showed high levels of plumbagin (0.261 ± 0.087 % and 0.327 ± 0.055 %, respectively). In contrast, leaves of P. auriculata did not show detectable levels of the toxin, and some stem samples showed low levels (up to 0.000114 %). Thus, these methodologies can be used to confirm or rule out the consumption of P. scandens in rumen content from animals suspected of poisoning.
Collapse
Affiliation(s)
- Carlos José Rocha Teixeira
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais (UFMG), Avenida Presidente Antônio Carlos 6627, Belo Horizonte, MG, 31275-013, Brazil
| | - Barbara Pereira Dos Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais (UFMG), Avenida Presidente Antônio Carlos 6627, Belo Horizonte, MG, 31275-013, Brazil
| | - Carolina Julia Costa Saraiva
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais (UFMG), Avenida Presidente Antônio Carlos 6627, Belo Horizonte, MG, 31275-013, Brazil
| | - Heloísa de Paula Pedroza
- Centro Universitário Presidente Antônio Carlos (UNIPAC), Rodovia MG 482, Km 3, Conselheiro Lafaiete, MG, Brazil
| | - Silvia Catarina Salgado Oloris
- Serviço de Biologia Celular, Diretoria de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias (Funed), Rua Conde Pereira Carneiro 80, Belo Horizonte, MG, 30510-010, Brazil
| | - Benito Soto-Blanco
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais (UFMG), Avenida Presidente Antônio Carlos 6627, Belo Horizonte, MG, 31275-013, Brazil.
| |
Collapse
|
2
|
Paudel MK, Sakamoto S, Van Huy L, Tanaka H, Miyamoto T, Morimoto S. The effect of varying the peptide linker length in a single chain variable fragment antibody against wogonin glucuronide. J Biotechnol 2017; 251:47-52. [DOI: 10.1016/j.jbiotec.2017.04.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 03/23/2017] [Accepted: 04/03/2017] [Indexed: 12/27/2022]
|
3
|
Cheng J, Zhao Y, Zhang M, Zhang Y, Liu X, Yan X, Wang Y, Sun Z, Wang Q, Qu H. Development of Fluorescence-Linked Immunosorbent Assay for Icariin. J Fluoresc 2017; 27:1661-1665. [PMID: 28466275 DOI: 10.1007/s10895-017-2103-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 04/21/2017] [Indexed: 10/19/2022]
Abstract
We have been looking for a faster and simpler method for traditional Chinese medicine and natural product assay. In this study, we developed a fluorescent immunoassay approach to detect icariin (ICA) using a fluorescently labelled monoclonal antibody. The ICA-specific antibody was purified by the caprylic acid-ammonium sulphate method and then labelled with rhodamine B isothiocyanate (RBITC). Subsequently, an indirect competitive fluorescence-linked immunosorbent assay (icFLISA) was developed to detect ICA using RBITC-labelled anti-ICA MAbs. The RBITC-labelled monoclonal antibody was highly specific for ICA. The fluorescence assay demonstrated an effective ICA measurement range of 1.28 ng/mL to 20 μg/mL (R2 = 0.9946) with relative standard deviations below 10% for both intra-assay and inter-assay repeatability and precision. This icFLISA for ICA is simple, rapid, and sensitive, with a 20-fold greater linear range and a 10-fold lower limit of detection than with the previously developed indirect competitive enzyme-linked immunosorbent assay (ELISA). Thus, this study establishes a useful method for detecting ICA, enabling in vivo visualization research. In the future, FLISA can be also used to assay the concentrations of ICA in biological samples, as well as to investigate the pharmacokinetics of ICA in different tissues to explore the targets of ICA in vivo.
Collapse
Affiliation(s)
- Jinjun Cheng
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing, 100029, China
| | - Yan Zhao
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing, 100029, China
| | - Meiling Zhang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing, 100029, China
| | - Yue Zhang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing, 100029, China
| | - Xiaoman Liu
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing, 100029, China
| | - Xin Yan
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing, 100029, China
| | - Yongzhi Wang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing, 100029, China
| | - Ziwei Sun
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing, 100029, China
| | - Qingguo Wang
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing, 100029, China
| | - Huihua Qu
- Beijing Institute of Traditional Chinese Medicine, Beijing University of Chinese Medicine, 11 Beisanhuandong Road, Chaoyang District, Beijing, 100029, China.
| |
Collapse
|
4
|
Efficient expression of single chain variable fragment antibody against paclitaxel using the Bombyx mori nucleopolyhedrovirus bacmid DNA system and its characterizations. J Nat Med 2016; 70:592-601. [PMID: 26940321 DOI: 10.1007/s11418-016-0981-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 02/21/2016] [Indexed: 10/22/2022]
Abstract
A single chain variable fragment (scFv), the smallest unit of functional recombinant antibody, is an attractive format of recombinant antibodies for various applications due to its small fragment and possibility of genetic engineering. Hybridoma clone 3A3 secreting anti-paclitaxel monoclonal antibody was used to construct genes encoding its variable domains of heavy (VH) and light (VL) chains. The VH and VL domains were linked to be the PT-scFv3A3 using flexible peptide linker in a format of VH-(GGGGS)5-VL. The PT-scFv3A3 was primarily expressed using the pET28a(+) vector in the Escherichia coli system, and was then further expressed by using the Bombyx mori nucleopolyhedrovirus (BmNPV) bacmid DNA system. Interestingly, the reactivity of PT-scFv3A3 expressed in the hemolymph of B. mori using the BmNPV bacmid DNA system was much higher than that expressed in the E. coli system. Using indirect competitive enzyme-linked immunosorbent assay (icELISA), the PT-scFv3A3 (B. mori) reacted not only with immobilized paclitaxel, but also with free paclitaxel in a concentration-dependent manner, with the linear range of free paclitaxel between 0.156 and 5.00 µg/ml. The PT-scFv3A3 (B. mori) exhibited less cross-reactivity (%) than its parental MAb clone 3A3 against paclitaxel-related compounds, including docetaxel (31.1 %), 7-xylosyltaxol (22.1 %), baccatin III (<0.68 %), 10-deacetylbaccatin III (<0.68 %), 1-hydroxybaccatin I (<0.68 %), and 1-acetoxy-5-deacetylbaccatin I (<0.68 %). With the exception of cephalomannine, the cross-reactivity was slightly increased to 8.50 %. The BmNPV bacmid DNA system was a highly efficient expression system of active PT-scFv3A3, which is applicable for PT-scFv3A3-based immunoassay of paclitaxel. In addition, the PT-scFv3A3 can be applied to evaluate its neutralizing property of paclitaxel or docetaxel toxicity.
Collapse
|
5
|
Development of Fluorescence-Linked Immunosorbent Assay for Paeoniflorin. J Fluoresc 2015; 25:885-90. [DOI: 10.1007/s10895-015-1568-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 04/10/2015] [Indexed: 11/30/2022]
|
6
|
Rodrigues JP, Andrade HF. Efficient duplex solid-phase fluorescent assay (dFISA) for the simultaneous detection of specific anti-T. gondii IgG and IgM due to refined conjugates. J Immunol Methods 2015; 420:11-7. [PMID: 25796562 DOI: 10.1016/j.jim.2015.03.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 02/04/2015] [Accepted: 03/11/2015] [Indexed: 11/28/2022]
Abstract
Toxoplasma gondii infections are very common, causing occasional central nervous system and eye diseases, and must be screened in prenatal care for efficient therapy. Here, we developed a duplex solid-phase fluorescent assay (dFISA) for the simultaneous detection of anti-T. gondii IgG and IgM antibodies in prenatal care screening for toxoplasmosis. Assays using commercially available ion-exchange purified conjugates yielded poor results and high background fluorescence. Same-well IgG/IgM dFISA with refined conjugates was used to test 140 samples from university students, 120 samples from pregnant women and 24 samples from adult volunteers at a large public hospital. We found that dFISA offers high concordance, specificity and reproducibility for IgG (Kappa=0.883) and IgM (Kappa=0.918), which is useful in high-throughput applications for antenatal care.
Collapse
Affiliation(s)
- J P Rodrigues
- Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo, Brazil; Instituto dos Laboratórios de Investigação Medica, HCFMUSP, Brazil; Laboratório de Protozoologia, Instituto de Medicina Tropical de São Paulo, Av. Dr. E. C. Aguiar, 470, 05403-000 São Paulo, SP Brazil
| | - H F Andrade
- Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo, Brazil; Instituto dos Laboratórios de Investigação Medica, HCFMUSP, Brazil; Laboratório de Protozoologia, Instituto de Medicina Tropical de São Paulo, Av. Dr. E. C. Aguiar, 470, 05403-000 São Paulo, SP Brazil.
| |
Collapse
|
7
|
Faulin TDES, Guilherme DF, Silva AS, Abdalla DSP, Hering VR, Politi MJ, Maranhão AQ. GFP-SCFV: expression and possible applications as a tool for experimental investigations of atherosclerosis. Biotechnol Prog 2014; 30:1206-13. [PMID: 24911875 DOI: 10.1002/btpr.1935] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 05/21/2014] [Indexed: 12/26/2022]
Abstract
Experimental studies on atherosclerosis are crucial for investigating its pathophysiology, defining new therapeutic targets, and developing new drugs and diagnostic tools. Thus, many imaging markers have been developed and introduced in experimental studies. The main advantage of these new tools is that they allow the noninvasive diagnosis of atherosclerotic vascular disease. Here, we describe the cloning, expression, purification, and stabilization of a chimeric protein specifically designed to probe cells and tissues for the presence of LDL(-), a relevant marker of atherosclerosis. The DNA sequence that encodes the anti-LDL(-) scFv, previously obtained from a hybridoma secreting an anti-LDL(-) monoclonal antibody, was inserted into the bacterial vector pET-28a(+) in tandem with a DNA sequence encoding GFP. The recombinant protein was expressed in high yields in E. coli as inclusion bodies. The applicability of GFP-scFv was assessed by ELISA, which determined its affinity for LDL(-) and confocal microscopy, that showed macrophage uptake of the protein along with LDL(-). In conclusion, our data suggest that the anti-LDL(-) GFP-scFv chimeric protein could be useful in studies on atherogenesis as well as for developing diagnostic tools for atherosclerosis.
Collapse
|
8
|
Jeong GM, Kim YS, Jeong KJ. A human kringle domain-based fluorescence-linked immunosorbent assay system. Anal Biochem 2014; 451:63-8. [DOI: 10.1016/j.ab.2014.01.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 01/04/2014] [Accepted: 01/31/2014] [Indexed: 10/25/2022]
|
9
|
Fluobodies against Bioactive Natural Products and their Application in Fluorescence-Linked Immunosorbent Assay. Antibodies (Basel) 2012. [DOI: 10.3390/antib1020239] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|