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de Andrade L, Duarte EL, Lamy MT, Rozenfeld JHK. Thermotropic Behavior and Structural Organization of C24:1 Sulfatide Dispersions and Its Mixtures with Cationic Bilayers. ACS Omega 2023; 8:5306-5315. [PMID: 36816677 PMCID: PMC9933474 DOI: 10.1021/acsomega.2c06189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
C24:1 sulfatide (SF) is an endogenous activator of type II NKT cells. The thermotropic behavior and structure of SF dispersions and its mixtures (4.8-16.6 mol %) with cationic dioctadecyldimethylammonium bromide (DODAB) bilayers were investigated by differential scanning calorimetry and electron paramagnetic resonance spectroscopy. The non-interdigitated lamellar structures formed by pure SF display broad thermal events around 27.5 °C when heated and cooled. These events disappear upon mixing with DODAB, showing complete lipid miscibility. SF decreases the DODAB gel-phase packing, with a consequent decrease in phase-transition temperatures and cooperativity upon heating. In contrast, SF increases the rigidity of the DODAB fluid phase, resulting in a smaller decrease in transition temperatures upon cooling. The hysteresis between heating and cooling decreased as the SF molar fraction increased. These effects on DODAB are similar to the ones described for other glycolipids, such as αGalCer and βGlcCer. This might be due to the orientation of the rigid and planar amide bond that connects their sphingoid bases and acyl chains, which result in a V-shaped conformation of the glycolipid molecules. The current results may be important to plan and develop new immunotherapeutic tools based on SF.
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Affiliation(s)
- Lucas de Andrade
- Departamento
de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, R. Botucatu 862, 04023-062São Paulo, São Paulo, Brazil
| | - Evandro L. Duarte
- Instituto
de Física, Universidade de São
Paulo, Rua do Matão
1371, 05508090São
Paulo, São Paulo, Brazil
| | - M. Teresa Lamy
- Instituto
de Física, Universidade de São
Paulo, Rua do Matão
1371, 05508090São
Paulo, São Paulo, Brazil
| | - Julio H. K. Rozenfeld
- Departamento
de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, R. Botucatu 862, 04023-062São Paulo, São Paulo, Brazil
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Ribas JLC, da Silva CA, de Andrade L, Galvan GL, Cestari MM, Trindade ES, Zampronio AR, de Assis HCS. Effects of anti-inflammatory drugs in primary kidney cell culture of a freshwater fish. Fish Shellfish Immunol 2014; 40:296-303. [PMID: 25038277 DOI: 10.1016/j.fsi.2014.07.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 07/07/2014] [Accepted: 07/08/2014] [Indexed: 06/03/2023]
Abstract
The non-steroidal anti-inflammatory drugs are emerging contaminants in aquatic ecosystems. This study aimed to evaluate toxic effects of some representative drugs of this pharmaceutical group on primary culture of monocytic lineage of Hoplias malabaricus anterior kidney. The effects of diclofenac, acetaminophen and ibuprofen in cell viability, lipopolysaccharide (LPS)-induced NO production and genotoxicity were evaluated. Cytometry analysis CD11b(+) cells showed 71.5% of stem cells, 19.5% of macrophages and 9% of monocytes. Cell viability was lower in the ficoll compared to percoll separation. LPS-induced NO production by these cells was blocked after treatment with dexamethasone and NG-Methyl-L-Arginine (L-NMMA). Exposure of the cells to diclofenac (0.2-200 ng/mL), acetaminophen (0.025-250 ng/mL) ibuprofen (10-1000 ng/mL) reduced basal NO production and inhibited LPS-induced NO production at all concentrations after 24 h of exposure. Genotoxicity occurred at the highest concentration of diclofenac and at the intermediary concentration of acetaminophen. Genotoxicity was also observed by ibuprofen. In summary, the pharmaceuticals influenced NO production and caused DNA damage in monocytic cells suggesting that these drugs can induce immunosuppression and genotoxicity in fish.
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Affiliation(s)
- João Luiz Coelho Ribas
- Department of Pharmacology, Federal University of Parana, 81531-980 Curitiba-Paraná, Brazil
| | - Cesar A da Silva
- Ecology and Conservation Post-graduate Program, Federal University of Paraná, 81531-980 Curitiba-Paraná, Brazil
| | - Lucas de Andrade
- Department of Cellular Biology, Federal University of Paraná, 81531-980 Curitiba-Paraná, Brazil
| | | | | | - Edvaldo S Trindade
- Department of Cellular Biology, Federal University of Paraná, 81531-980 Curitiba-Paraná, Brazil
| | - Aleksander R Zampronio
- Department of Pharmacology, Federal University of Parana, 81531-980 Curitiba-Paraná, Brazil
| | - Helena C Silva de Assis
- Department of Pharmacology, Federal University of Parana, 81531-980 Curitiba-Paraná, Brazil.
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Vasconcelos PF, Luna EJ, Galler R, Silva LJ, Coimbra TL, Barros VL, Monath TP, Rodigues SG, Laval C, Costa ZG, Vilela MF, Santos CL, Papaiordanou PM, Alves VA, Andrade LD, Sato HK, Rosa ES, Froguas GB, Lacava E, Almeida LM, Cruz AC, Rocco IM, Santos RT, Oliva OF, Papaiordanou CM. Serious adverse events associated with yellow fever 17DD vaccine in Brazil: a report of two cases. Lancet 2001; 358:91-7. [PMID: 11463409 DOI: 10.1016/s0140-6736(01)05326-0] [Citation(s) in RCA: 220] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND The yellow fever vaccine is regarded as one of the safest attenuated virus vaccines, with few side-effects or adverse events. We report the occurrence of two fatal cases of haemorrhagic fever associated with yellow fever 17DD substrain vaccine in Brazil. METHODS We obtained epidemiological, serological, virological, pathological, immunocytochemical, and molecular biological data on the two cases to determine the cause of the illnesses. FINDINGS The first case, in a 5-year-old white girl, was characterised by sudden onset of fever accompanied by headache, malaise, and vomiting 3 days after receiving yellow fever and measles-mumps-rubella vaccines. Afterwards she decompensated with icterus and haemorrhagic signs and died after a 5-day illness. The second patient-a 22-year-old black woman-developed a sore throat and fever accompanied by headache, myalgia, nausea, and vomiting 4 days after yellow fever vaccination. She then developed icterus, renal failure, and haemorrhagic diathesis, and died after 6 days of illness. Yellow fever virus was recovered in suckling mice and C6/36 cells from blood in both cases, as well as from fragments of liver, spleen, skin, and heart from the first case and from these and other viscera fragments in case 2. RNA of yellow fever virus was identical to that previously described for 17D genomic sequences. IgM ELISA tests for yellow fever virus were negative in case 1 and positive in case 2; similar tests for dengue, hantaviruses, arenaviruses, Leptospira, and hepatitis viruses A-D were negative. Tissue injuries from both patients were typical of wild-type yellow fever. INTERPRETATION These serious and hitherto unknown complications of yellow fever vaccination are extremely rare, but the safety of yellow fever 17DD vaccine needs to be reviewed. Host factors, probably idiosyncratic reactions, might have had a substantial contributed to the unexpected outcome.
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Affiliation(s)
- P F Vasconcelos
- Instituto Evandro Chagas/Fundação Nacional de Saúde (FUNASA), Belém, Brazil.
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Andrade LD, Medeiros Z, Pires ML, Pimentel A, Rocha A, Figueredo-Silva J, Coutinho A, Dreyer G. Comparative efficacy of three different diethylcarbamazine regimens in lymphatic filariasis. Trans R Soc Trop Med Hyg 1995; 89:319-21. [PMID: 7660449 DOI: 10.1016/0035-9203(95)90561-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
To assess the efficacy of diethylcarbamazine (DEC) in clearing Wuchereria bancrofti microfilariae (mf) from the circulation, we conducted a single blind hospital-based therapeutic trial of 3 DEC regimens. All patients were assessed by filtration of 1 mL of venous blood taken before and 1, 3, 6 and 12 months after DEC administration. The efficacy of a 12 d course of 6 mg/kg DEC once daily was identical to that of a similar course with 2 mg/kg given 3 times daily, indicating that split-dose treatment does not improve mf clearance over single daily drug administration. Microfilarial densities in patients treated only once with 6 mg/kg DEC remained significantly higher at 1, 3, and 6 months after treatment. However, all 3 treatment regimens proved equally effective in controlling microfilaraemia after 12 months, when 41, 42 and 40% of patients in the 3 treatment groups were amicrofilaraemic. These results suggest that a single DEC dose of 6 mg/kg administered annually or biannually may be a suitable regimen to control bancroftian filariasis in Recife, Brazil.
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Affiliation(s)
- L D Andrade
- Departamento de Parasitologia, Centro de Pesquisas Aggeu, Magalhães/FIOCRUZ, Recife, Pernambuco, Brasil
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Dreyer G, Coutinho A, Miranda D, Noroes J, Rizzo JA, Galdino E, Rocha A, Medeiros Z, Andrade LD, Santos A. Treatment of bancroftian filariasis in Recife, Brazil: a two-year comparative study of the efficacy of single treatments with ivermectin or diethylcarbamazine. Trans R Soc Trop Med Hyg 1995; 89:98-102. [PMID: 7747322 DOI: 10.1016/0035-9203(95)90674-6] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
The effectiveness of single oral doses of ivermectin (200 or 400 micrograms/kg) and diethylcarbamazine (DEC, 6 mg/kg), preceded 4 d earlier by either placebo or very small doses of these drugs, was compared, over a 2-year period, in a double-blind trial in 67 microfilaraemic Brazilian men with bancroftian filariasis. Regimens containing ivermectin alone decreased the number of microfilariae significantly faster and more effectively for the first month after treatment than regimens containing DEC alone, but the latter were significantly more effective throughout the second year after treatment (1.7-8.2% of pretreatment levels with DEC vs. 12.6-30.8% with ivermectin during that period); the higher ivermectin dose showed a tendency towards more effectiveness than the lower dose. Most effective was the combination of ivermectin (20 micrograms/kg) followed 4 d later by DEC (6 mg/kg), with reduction of microfilaraemia to 2.4% of pretreatment levels at 2 years. Adverse reactions were well tolerated with all regimens, the reactions being significantly more generalized (i.e., fever) following ivermectin and localized (i.e., scrotal inflammatory nodules around dying adult worms) following DEC. Further trials of single-dose combination therapy vs. single high doses of ivermectin or DEC should determine the ideal regimen for treatment and control of bancroftian filariasis.
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Affiliation(s)
- G Dreyer
- Centro de Pesquisas Aggeu Magalhaes/FIOCRUZ, Recife, Brazil
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Coutinho AD, Dreyer G, Medeiros Z, Lopes E, Machado G, Galdino E, Rizzo JA, Andrade LD, Rocha A, Moura I. Ivermectin treatment of bancroftian filariasis in Recife, Brazil. Am J Trop Med Hyg 1994; 50:339-48. [PMID: 8147492 DOI: 10.4269/ajtmh.1994.50.339] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
To determine the effectiveness of single oral dosages of ivermectin ranging between 20 and 200 micrograms/kg and to make detailed observations of both the kinetics of parasite killing and the adverse reactions induced by treatment, the present double-blind study on ivermectin treatment of lymphatic filariasis caused by Wuchereria bancrofti was undertaken with 43 microfilaremic patients in Recife, Brazil. Follow-up at one year indicated equivalent efficacy for the 20-, 100-, and 200-micrograms/kg drug dosages in reducing microfilaremia to geometric means of 13-25% of pretreatment levels. Adverse clinical reactions (predominantly fever, headache, weakness, and myalgia) occurred to some degree in almost all patients but generally lasted only 24-48 hr and were easily managed symptomatically. Adverse reactions were significantly milder in those receiving the lowest (20 micrograms/kg) ivermectin dose, and they were significantly correlated with individuals' pretreatment microfilaremia levels in all groups. Posttreatment eosinophilia was a regular feature of the response to treatment, with the magnitude and kinetics also proportional to pretreatment microfilarial levels. Transient pulmonary function abnormalities (16 of 42, 38%), liver enzyme elevations (10 of 43, 23%), and hematuria (9 of 42, 22%) developed posttreatment, but all cleared without significant complications. The results indicate that W. bancrofti from Brazil is similar to strains of the parasites studied elsewhere in susceptibility to ivermectin, that the drug's systemic adverse reactions are essentially those resulting from parasite clearance, and that the intensity of these reactions can be significantly reduced by using the low (20 micrograms/kg) dose of ivermectin. This detailed dose-finding study provides information necessary for developing optimal regimens to treat bancroftian filariasis with ivermectin either alone or in combination with other medications.
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Affiliation(s)
- A D Coutinho
- Centro de Pesquisas Aggeu Magalhaes, Fiocruz, Recife, Brazil
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Souto-Padrón T, Dreyer G, Andrade LD, Rocha A, De Souza W. Immunocytochemical localization of surface and intracellular antigens recognized by human sera in microfilariae of Wuchereria bancrofti. J Submicrosc Cytol Pathol 1993; 25:79-83. [PMID: 8462071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Sera from patients with various clinical pictures of lymphatic filariasis, including tropical pulmonary eosinophilia (TPE), were used for the localization of surface and intracellular antigens in microfilariae of Wuchereria bancrofti embedded in Lowicryl K4M. Very few or no antigenic sites were located on the outer face of the sheath. The most inner layer, as well as the space between the cuticle and the sheath, was intensely labeled. Sera from TPE patients intensely labeled the cuticle and the cytoplasm of muscle cells.
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Affiliation(s)
- T Souto-Padrón
- Laboratory of Cellular Ultrastructure, Institute of Biophysics Carlos Chagas Filho, Federal University, Rio de Janeiro, Brasil
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Medeiros Z, Dreyer G, Andrade LD, Pires ML, Mendes J, Pimentel R. Wuchereria bancrofti microfilarial density of autochthonous cases and natural Culex infectivity rates in northeast Brazil. J Trop Med Hyg 1992; 95:214-7. [PMID: 1597880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Autochthonous Wuchereria bancrofti microfilaraemic cases from three neighbouring cities of Northeast Brazil (Recife, Jaboatao and Olinda) were selected from thick smear or filtration positive individuals and classified by their microfilarial (mf) densities through polycarbonate membrane blood filtration. Individuals were subdivided into two groups: autochthonous cases without any previous specific drug administrations (group A) and those with one or more previous DEC treatments (group B). In Recife, unlike Jaboatao and Olinda (P less than 0.05), the majority of autochthonous cases were over 20 years old and no microfilaraemics were found under the age of 10. The majority of cases in Recife had lower levels of mf density (66.6%), while in Jaboatao and Olinda higher mf carriers (65.6%) prevailed when group A (n = 141) individuals were rearranged in mf density above and below 500 mf ml-1 (P less than 0.01). All subjects in group B (n = 110) had less than 501 mf ml-1 and the great majority less than 100 mf ml-1, but a significant difference (P less than 0.05) between Recife and the two other cities was observed. Captured mosquitoes in Recife, Jaboatao and Olinda totalled 7856, 8010 and 8003 respectively. The infectivity rate found in Recife (0.61%) was significantly lower than in Jaboatao (1.21%) and Olinda (1.31%) (P less than 0.001). The authors discuss the possible influences of previous disease control programmes (medicated salt and individual treatments) applied only to the city of Recife in relation to the outcome of this investigation.
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Affiliation(s)
- Z Medeiros
- Centro de Pesquisas Aggeu Magalhaes, Fiocruz, Recife, Brazil
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