1
|
Neves A, Marto J, Duarte A, Gonçalves LM, Pinto P, Figueiredo AC, Ribeiro HM. Characterization of Portuguese Thymbra capitata
, Thymus caespititius
and Myrtus communis
essential oils in topical formulations. FLAVOUR FRAG J 2017. [DOI: 10.1002/ffj.3393] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- A. Neves
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Portugal
| | - J. Marto
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Portugal
| | - A. Duarte
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Portugal
| | - L. M. Gonçalves
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Portugal
| | - P. Pinto
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Portugal
- PhD Trials, Rua das Murtas; Lisbon Portugal
| | - A. C. Figueiredo
- Centro de Estudos do Ambiente e do Mar (CESAM Lisboa); Faculdade de Ciências da Universidade de Lisboa, Centro de Biotecnologia Vegetal (CBV); Lisbon Portugal
| | - H. M. Ribeiro
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.ULisboa), Faculty of Pharmacy; Universidade de Lisboa; Portugal
| |
Collapse
|
2
|
Ghazghazi H, Miguel MG, Weslati M, Hasnaoui B, Sebei H, Barroso JG, Pedro LG, Figueiredo AC. Chemical variability of the essential oils fromRosa caninaL. andRosa sempervirensL. flowers collected at Tunisia. Journal of Essential Oil Research 2012. [DOI: 10.1080/10412905.2012.703509] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
3
|
Cavalcanti AB, Silva UV, Normílio-Silva KN, Silva AN, Zancani R, Giorgi MJ, Dias AD, Simone AT, Safra PL, Figueiredo AC, Tunes-da-Silva G, Lima AC, Hajjar LA, Auler JO, Eluf-Neto J, Galas FR. Health-related quality of life and survival of cancer patients admitted to ICUs: Results of the QALY study. Crit Care 2012. [PMCID: PMC3363829 DOI: 10.1186/cc11018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
4
|
Pereira PJB, Figueiredo AC, Macedo-Ribeiro S, Philipp M, Clement CC. Structural characterization of D-Phe-Pro- D-Arg-derived thrombin inhibitors. Acta Crystallogr A 2011. [DOI: 10.1107/s010876731109218x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
|
5
|
Miguel G, Cruz C, Faleiro ML, Simões MTF, Figueiredo AC, Barroso JG, Pedro LG. Salvia officinalis L. essential oils: effect of hydrodistillation time on the chemical composition, antioxidant and antimicrobial activities. Nat Prod Res 2011; 25:526-41. [PMID: 21391115 DOI: 10.1080/14786419.2010.499513] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Salvia officinalis L. oils were isolated from the plant's commercial dried aerial parts, by hydrodistillation, with different distillation times. The essential oils were analysed by gas chromatography and gas chromatography-mass spectrometry. The antioxidant ability was measured using a free radical scavenging activity assay using 2,2-diphenyl-1-picrylhydrazyl (DPPH), a thiobarbituric acid reactive substances (TBARS) assay, a deoxyribose assay for the scavenging of hydroxyl radical, an assay for site-specific actions and a 5-lipoxygenase assay. Antibacterial activity was determined by the agar diffusion method. 1,8-Cineole, α-pinene and camphor were the dominant components of all the essential oils. The different hydrodistillation times did not affect the oil yield nor the relative amount of the oil components. The time of hydrodistillation influenced the antioxidant activity. With the DPPH method, the oils isolated for 2 and 3 h were stronger free radical scavengers, while with the TBARS method, the highest antioxidant values were obtained in the oils isolated for 30 min, 2 and 3 h. Hydroxyl radical scavenging and lipoxygenase activity assays showed the best results with oils isolated for 1 and 3 h. With the deoxyribose method, sage oils at concentrations <1000 mg L(-1) showed better activity than mannitol. The essential oil of S. officinalis showed very weak antimicrobial activity.
Collapse
Affiliation(s)
- G Miguel
- Universidade do Algarve, Faculdade de Ciências e Tecnologia, DQF, Edifício 8, Campus de Gambelas 8005-139 Faro, Portugal.
| | | | | | | | | | | | | |
Collapse
|
6
|
|
7
|
Barbosa P, Lima AS, Vieira P, Dias LS, Tinoco MT, Barroso JG, Pedro LG, Figueiredo AC, Mota M. Nematicidal activity of essential oils and volatiles derived from Portuguese aromatic flora against the pinewood nematode, Bursaphelenchus xylophilus. J Nematol 2010; 42:8-16. [PMID: 22736831 PMCID: PMC3380513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2010] [Indexed: 06/01/2023] Open
Abstract
Twenty seven essential oils, isolated from plants representing 11 families of Portuguese flora, were screened for their nematicidal activity against the pinewood nematode (PWN), Bursaphelenchus xylophilus. The essential oils were isolated by hydrodistillation and the volatiles by distillation-extraction, and both were analysed by GC and GC-MS. High nematicidal activity was achieved with essential oils from Chamaespartium tridentatum, Origanum vulgare, Satureja montana, Thymbra capitata, and Thymus caespititius. All of these essential oils had an estimated minimum inhibitory concentration ranging between 0.097 and 0.374 mg/ml and a lethal concentration necessary to kill 100% of the population (LC(100)) between 0.858 and 1.984 mg/ml. Good nematicidal activity was also obtained with the essential oil from Cymbopogon citratus. The dominant components of the effective oils were 1-octen-3-ol (9%), n-nonanal, and linalool (both 7%) in C. tridentatum, geranial (43%), neral (29%), and β-myrcene (25%) in C. citratus, carvacrol (36% and 39%), γ-terpinene (24% and 40%), and p-cymene (14% and 7%) in O. vulgare and S. montana, respectively, and carvacrol (75% and 65%, respectively) in T. capitata and T. caespititius. The other essential oils obtained from Portuguese flora yielded weak or no activity. Five essential oils with nematicidal activity against PWN are reported for the first time.
Collapse
Affiliation(s)
- P Barbosa
- NemaLab-ICAAM, Departamento de Biologia, Universidade de Évora, 7002-554 Évora, Portugal
| | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Miguel MG, Figueiredo AC, Costa MM, Martins D, Barroso JG, Pedro L. Effect of the essential volatile oils isolated from Thymbra capitata (L.) Cav. on olive and sunflower oils. Grasas y Aceites 2007. [DOI: 10.3989/gya.2003.v54.i3.234] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
9
|
Coelho JA, Grosso C, Pereira AP, Burillo J, Urieta JS, Figueiredo AC, Barroso JG, Mendes RL, Palavra AMF. Supercritical carbon dioxide extraction of volatiles from Satureja fruticosa Béguinot. FLAVOUR FRAG J 2007. [DOI: 10.1002/ffj.1819] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
10
|
Zawadzki B, Figueiredo AC, Paoli D, Gelbvaks S, Schubsky B, Nácul FE. Simulation-based training on emergencies in cardiology: experience with 497 trainees. Crit Care 2007. [PMCID: PMC3301173 DOI: 10.1186/cc5833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
11
|
Drager LF, Pereira AC, Barreto-Filho JA, Figueiredo AC, Krieger JE, Krieger EM, Lorenzi-Filho G. Phenotypic characteristics associated with hypertension in patients with obstructive sleep apnea. J Hum Hypertens 2006; 20:523-8. [PMID: 16543905 DOI: 10.1038/sj.jhh.1002012] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [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: 11/08/2022]
Abstract
Obstructive sleep apnea (OSA) causes secondary hypertension. However, the reasons why the prevalence of hypertension among OSA patients varies widely (35-70%) are not clear. We sought to investigate the phenotypic characteristics of patients with and without hypertension among OSA patients who were matched for disease severity. We studied 152 OSA patients (76 normotensive and 76 hypertensive) diagnosed by polysomnography. Detailed phenotypic characteristics, including laboratorial analysis, were determined in all patients. Univariate analysis followed by multiple logistic regression analysis was used to identify variables that were independently associated with hypertension. The apnea-hypopnea index in normotensive and hypertensive patients was similar (48+/-26 and 48+/-26 events/h, respectively) as well as minimum arterial oxygen saturation (76+/-10 and 75+/-10%, respectively) and total sleep time with oxyhaemoglobin saturation <90% (25+/-25 and 28+/-26%, respectively). Hypertensive patients were older (57+/-11 vs 47+/-12 years; P<0.001), had a higher body mass index (BMI; 34+/-7 vs 30+/-5 kg/m(2); P<0.001), had a higher frequency of women (37 vs 8%; P<0.001), had a higher incidence of diabetes (25 vs 6%; P=0.002) and a higher family history of hypertension (75 vs 42%; P=0.01) than did the normotensive patients. Multiple logistic regression analysis indicated that age (P=0.004), familial history of hypertension (P=0.004), BMI (P=0.04) and female sex (P=0.03) were the independent variables associated with hypertension. We concluded that increasing age and BMI, familial history of hypertension as well as female gender are phenotypic characteristics associated with hypertension among OSA patients with similar disease severity.
Collapse
Affiliation(s)
- L F Drager
- Hypertension Unit, Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil.
| | | | | | | | | | | | | |
Collapse
|
12
|
Vasconcelos E, Sousa AP, Seghatchian J, Maurício R, Figueiredo AC, Leitão C, Sousa G. The content of the LRS chamber provides a new quality tool for the characterization of the donor platelet profile. Transfus Apher Sci 2005; 32:221-5. [PMID: 15784457 DOI: 10.1016/j.transci.2004.10.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2004] [Accepted: 10/01/2004] [Indexed: 11/24/2022]
Abstract
Cobe Trima version 4 is an apheresis system designed for the collection of combinations of Red Blood Cells (RBC), Platelets (PLT) and plasma components from a single donor. The validation of this apheresis system for PLT components in our institution evidenced the LRS efficacy, as leucoreduction was attained on a 100% basis. However, there were some unexpected occurrences regarding the PLT content. Certain donations showed large disagreements between programmed and obtained yields, not being found clear reasons for those outcomes. Furthermore, the mean platelet volume (MPV) was relatively low when compared with other platelets components produced by other methodologies. An investigation was initiated in order to know whether these shortcomings were donor or process/instrument related. A link was established between the raw material (donor), the process/instrument and the final product, and a new tool was introduced by the study of the LRS chamber. The LRS chamber content was assessed and the PLT cellular indices and PLT aggregation states compared with those obtained from the respective donor and the final product from the same origin. The storage stability of the final products was also analyzed based on these same tests to investigate if the initial low MPV had any deleterious effect during the shelf life of the components. Twenty five plateletpheresis donors, three of them new ones, were randomly selected for this study. For the first time, the content of the LRS chamber was used as a quality tool for identification of the cause of unexpected yields. Large aggregates remained in the LRS chamber in certain donors who were prone to undergo spontaneous aggregation, making the platelet yields low and platelet MPV very small. Based on repeated failures and on this new quality parameter showing LRS chamber abnormality, two donors were temporarily deferred from the panel. While it was not possible to identify the causes, it is appropriate to raise the question whether these profiles were Trima version 4 specific or not. Hence, further investigation is needed for a better clarification. In short, the simultaneous analysis of products and LRS content provided useful information not only for the characterization of donor-related phenomena but also helped in the identification of potential shortcomings in the machine performance allowing for remedial action to be taken on evidence based data.
Collapse
Affiliation(s)
- E Vasconcelos
- Centro Regional de Sangue de Lisboa, Instituto Português do Sangue, Avenida do Brasil, 53, Pav. 17, 1700 Lisboa, Portugal.
| | | | | | | | | | | | | |
Collapse
|
13
|
Abstract
Platelets derived from platelet rich plasma, buffy coat and Apheresis technologies differ in terms of in vitro functional activity, aggregation states and storage characteristics, as measured by automated cell counters, and pH assessment. This may be related to either differences in the subpopulation of platelets and leucocytes recovered or the processing/storage induced cellular damage. Some types of methodologies, such as BC derived-PC, appear to have a higher rate of bacterial contamination.
Collapse
Affiliation(s)
- Eugenia Vasconcelos
- Centro Regional de Sangue de Lisboa, Instituto Português do Sangue, Lisboa, Portugal.
| | | | | |
Collapse
|
14
|
Pereira SI, Santos PAG, Barroso JG, Figueiredo AC, Pedro LG, Salgueiro LR, Deans SG, Scheffer JJC. Chemical polymorphism of the essential oils from populations of Thymus caespititius grown on the islands Pico, Faial and Graciosa (Azores). Phytochem Anal 2003; 14:228-231. [PMID: 12892419 DOI: 10.1002/pca.708] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The compositions of the essential oils isolated from the aerial parts of 11 populations of Thymus caespititius collected during the flowering phase on Pico, Faial and Graciosa (Azores) were studied by GC and GC-MS. The monoterpene fraction was dominant in all the oils analysed (55-90%) and consisted mainly of oxygen-containing compounds (44-79%). Sesquiterpenes represented an important fraction of the oils from the populations grown on Graciosa (13-28%). In contrast, this fraction was rather small in the oils from the populations grown on Pico and Faial (6-11%). Despite this, oxygen-containing compounds (4-18%) were always dominant. Cluster analysis of all identified oil components grouped the oils into three main clusters that corresponded with their main components. The oils from the 11 populations studied showed a clear chemical polymorphism that, in some cases, was more evident among populations growing on the same island than among those from different islands.
Collapse
Affiliation(s)
- S I Pereira
- Centro de Biotecnologia Vegetal, Departamento de Biologia Vegetal, Faculdade de Ciências de Lisboa, Bloco C2, Campo Grande, 1749-016 Lisbon, Portugal
| | | | | | | | | | | | | | | |
Collapse
|
15
|
Faleiro ML, Miguel MG, Ladeiro F, Venâncio F, Tavares R, Brito JC, Figueiredo AC, Barroso JG, Pedro LG. Antimicrobial activity of essential oils isolated from Portuguese endemic species of Thymus. Lett Appl Microbiol 2003; 36:35-40. [PMID: 12485339 DOI: 10.1046/j.1472-765x.2003.01259.x] [Citation(s) in RCA: 121] [Impact Index Per Article: 5.8] [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: 11/20/2022]
Abstract
AIMS Thymus species are wild species mostly found in the arid lands of Portugal. Possible antimicrobial properties of Thymus essential oils have been investigated. The chemical composition of the essential oils and the antimicrobial activity of Thymus mastichina (L) L. subsp. mastichina, T. camphoratus and T. lotocephalus from different regions of Portugal were analysed. METHODS AND RESULTS Hydrodistillation was used to isolate the essential oils and the chemical analyses were performed by gas chromatography (GC) and GC coupled to mass spectrometry. The antimicrobial activity was tested by the disc agar diffusion technique against Candida albicans, Escherichia coli, Listeria monocytogenes, Proteus mirabilis, Salmonella spp. and Staphylococcus aureus. Pure linalool, 1,8-cineole and a mixture (1 : 1) of these compounds were included. Linalool, 1,8-cineole or linalool/1,8-cineole and linalool/1,8-cineole/linalyl acetate were the major components of the essential oils, depending on the species or sampling place. The essential oils isolated from the Thymus species studied demonstrated antimicrobial activity but the micro-organisms tested had significantly different sensitivities. CONCLUSIONS The antimicrobial activity of essential oils may be related to more than one component. SIGNIFICANCE AND IMPACT OF THE STUDY Portuguese endemic species of Thymus can be used for essential oil production for food spoilage control, cosmetics and pharmaceutical use. Further studies will be required to elucidate the cell targets of the essential oil components.
Collapse
Affiliation(s)
- M L Faleiro
- Faculdade de Engenharia de Recursos Naturais, Universidade do Algarve, Faro and INETI, IBQTA, Departamento de Tecnologia das Indústrias Químicas, Lisboa and Centro de Biotecnologia Vegetal, FCL, Lisboa, Portugal.
| | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Pedro LG, Santos PA, da Silva JA, Figueiredo AC, Barroso JG, Deans SG, Looman A, Scheffer JJ. Essential oils from Azorean Laurus azorica. Phytochemistry 2001; 57:245-250. [PMID: 11382240 DOI: 10.1016/s0031-9422(00)00497-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The essential oils isolated from leaves of ten and from unripe berries of eight populations of Laurus azorica (Seub.) Franco, collected on five islands of the Azorean archipelago, were analysed by GC and GC-MS. All oil samples were dominated by their monoterpene fraction (60-94%), alpha-pinene (15-37%) and 1,8-cineole (12-31%) being the main components of the leaf oils, while trans-beta-ocimene (27-45%) and alpha-pinene (12-22%) were the main components of the oils from the berries. The sesquiterpene fractions of the oils ranged from 3 to 17% and the main components were beta-caryophyllene (traces-8%) and beta-elemene (traces-3%) both in the leaf and berry oils. Some phenylpropanoid components were also present, in total amounting to 17%, trans-cinnamyl acetate (215% of the leaf oils) being the main component of this fraction. Cluster analysis of the enantiomeric composition of alpha- and beta-pinene in the oils from the leaves clearly showed two groups, one constituted by the two populations growing on the island S. Jorge, and the other constituted by the remaining populations.
Collapse
Affiliation(s)
- L G Pedro
- Centro de Biotenologia Vegetal, Departamento de Biologia Vegetal, Faculdade de Ciências de Lisboa, Lisbon, Portugal.
| | | | | | | | | | | | | | | |
Collapse
|
17
|
Abstract
PURPOSE To describe an easily home-made diathermy probe for the performance of retrograde endopyelotomies using a small-caliber rigid ureteroscope. METHODS The diathermy probe is easily built by putting a rigid guidewire through a 5F ureteral catheter, the distal tip being naked and slightly bent. The other end is linked to the electric generator. Among a total of 24 retrograde endopyelotomies performed to treat ureteropelvic junction obstruction in the last 7 years, five were done using this device. RESULTS Surgery with the probe took an average of 30 minutes. There were no complications, and, as of today, all cases are successes. CONCLUSION This device allows the performance of retrograde endopyelotomy using a small-caliber ureteroscope. Long-term results will presumably match the good results obtained using the larger-caliber ureteroscopes with the classic cold knife.
Collapse
Affiliation(s)
- E G Silva
- Department of Urology and Transplantation, University Hospital of Coimbra, Portugal
| | | | | | | | | |
Collapse
|
18
|
Pereira SI, Santos PA, Barroso JG, Figueiredo AC, Pedro LG, Salgueiro LR, Deans SG, Scheffer JJ. Chemical polymorphism of the essential oils from populations of Thymus caespititius grown on the island S. Jorge (Azores). Phytochemistry 2000; 55:241-246. [PMID: 11142850 DOI: 10.1016/s0031-9422(00)00278-8] [Citation(s) in RCA: 18] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The compositions of the essential oils obtained from ten populations of Thymus caespititius grown on S. Jorge (Azores) were studied by GC and GC-MS. All the oils analysed were dominated by their monoterpene fraction (69-9%). The sesquiterpene fraction was rather small (4-17%) and consisted mainly of oxygen-containing compounds (3-13%). Enantiomeric ratio of sabinene and alpha-terpineol was investigated in the oils from some populations. (+)-Sabinene was detected with high enatiomeric purity (96 99%). Although ( +)-alpha terpineol was the predominant enantiomer, its purity varied considerably (66-97%). Cluster analysis of all identified components grouped the oils into four main clusters that corresponded with their major components: alpha-terpineol (43-68%), carvacrol (32-52%), thymol (44-58%) and sabinene (41%). The essential oil from Th. caespititius showed a clear chemical polymorphism, that was particularly evident among four populations growing along a 200 m distance at Pico Verde.
Collapse
Affiliation(s)
- S I Pereira
- Centro de Biotecnologia Vegetal, Departamento de Biologia Vegetal, Faculdade de Ciências de Lisboa, Lisbon, Portugal
| | | | | | | | | | | | | | | |
Collapse
|
19
|
Abstract
Photosensitivity is an uncommon but characteristic side effect of quinolones, with a variable incidence for the different drugs. Several cases, considered either phototoxic or photoallergic, have been described with lomefloxacin use. During the last 4 years we studied 8 patients (mean age 69.4 years) with eczematous or acute sunburn-like lesions in photo-exposed areas, after taking lomefloxacin for a period of one week to several months. After drug withdrawal and systemic and/or topical corticosteroids, lesions cleared within one week to two months, with dischromia in one patient. Six to eight weeks thereafter, a photobiological study was performed. Minimal erythema dose (MED) for UVA and UVB were normal and photopatch tests with lomefloxacin, ofloxacin, ciproflaxacin and norfloxacin, tested at 1%, 5% and 10% in petrolatum and irradiated with 5 and 10 J/cm2 UVA were negative in 7 patients and 20 controls. Patient 1 had a positive photopatch test with lomefloxacin. One patient, who inadvertently reintroduced the drug before photopatch testing, developed a sharply limited erythematous reaction at 48 h in all irradiated areas, without aggravation at the sites of the quinolones patches. Our patients illustrate the polymorphism of clinical photosensitivity to lomefloxacin and represent the largest series in which photobiological studies have been performed. As in previous reports there are arguments favouring photoallergy, but phototoxicity appears to be the main mechanism of photosensitivity to quinolones, particularly in older patients with concomitant diseases and long-term use of the drug.
Collapse
Affiliation(s)
- H S Oliveira
- Dermatology Service, Coimbra University Hospital, Portugal
| | | | | |
Collapse
|
20
|
Abstract
Myelin basic protein (MBP) is a major protein of central nervous system myelin which can induce experimental autoimmune encephalomyelitis (EAE) in susceptible laboratory animals. The role of T cells in the induction of EAE has been extensively studied, but the antibody response to MBP has not been well characterized. In the present work, we immunized rats with encephalitogenic guinea-pig MBP and mapped autoreactive antibodies binding to peptides in the rat MBP sequence. We studied the responses of the Lewis rat strain, susceptible to EAE, and the responses of the Fischer and Brown-Norway (BN) rats, resistant to EAE. We found that Lewis rats immunized to guinea-pig MBP develop antibodies to a diversity of MBP epitopes with a dominance of MBP peptide p11-30 and peptides in the 71-140 region. Fischer rats showed a similar pattern of antibody specificities, but with higher titers than the Lewis rats. BN rats, in contrast, developed a very low titer of antibodies and lacked a response to p11-30. Thus, there is no clear correlation between the nature of the anti-MBP antibody response and the state of susceptibility or resistance to EAE induction in the different rat strains.
Collapse
Affiliation(s)
- A C Figueiredo
- Department of Immunology, Weizmann Institute of Science, Rehovot, 76100, Israel
| | | | | |
Collapse
|
21
|
de Lima VL, Figueiredo AC, Pignatti MG, Modolo M. [Spotted fever in the town of Pedreira, São Paulo state, Brazil. The relationship between the occurrence of cases and human parasitism by ixodid ticks]. Rev Soc Bras Med Trop 1995; 28:135-7. [PMID: 7716327 DOI: 10.1590/s0037-86821995000200010] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
|
22
|
Figueiredo AC, Barroso JG, Pais MSS, Scheffer JJC. Composition of the Essential Oils from Two Populations of Achillea millefolium L. ssp. millefolium. J Chromatogr Sci 1992. [DOI: 10.1093/chromsci/30.10.392] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
23
|
Figueiredo AC, Dias LC, Marques EH. Biological and morphological characteristics of Schistosoma mansoni from Ribeira Valley, state of São Paulo, Brazil I--Susceptibility of Biomphalaria tenagophila snail to sympatric S. mansoni strain. Rev Inst Med Trop Sao Paulo 1992; 34:199-203. [PMID: 1342070 DOI: 10.1590/s0036-46651992000300003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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: 12/26/2022] Open
Abstract
In the São Paulo State, Brazil, where the Biomphalaria tenagophila is the intermediate host, the Ribeira Valley is an important endemic schistosomiasis mansoni area. During last eleven years there has been intense control measures focusing on schistosomiasis. The efforts have been concentrated in the municipalities of Pedro de Toledo and Itariri. We determined the susceptibility of B. tenagophila to sympatric strain of S. mansoni, both recently isolated from Itariri field. In 1988, this strain was isolated and maintained in the experimental model: Swiss mice--sympatric B. tenagophila. The second generation of the worm was evaluated. The snail were divided in the three groups of 60 snails each. One group was exposed to 1 miracidium and other to 10. The third group was the control. The mortality and the shedding of cercariae were checked during 78 days. After that, the positive snails were observed until they ceased to shed cercariae. The exposed molluscs showed mortality rates of 23% and 31% and infection indexes were of 8% and 60% to 1 and 10 miracidia respectively. The mortality was of 22% in the control group. The periods of shedding cercariae in the two groups were 82 and 104 days. We can conclude that B. tenagophila is an effective intermediate host to the sympatric strain of S. mansoni sympatric strain.
Collapse
|
24
|
De Wit D, Van Mechelen M, Ryelandt M, Figueiredo AC, Abramowicz D, Goldman M, Bazin H, Urbain J, Leo O. The injection of deaggregated gamma globulins in adult mice induces antigen-specific unresponsiveness of T helper type 1 but not type 2 lymphocytes. J Exp Med 1992; 175:9-14. [PMID: 1370533 PMCID: PMC2119093 DOI: 10.1084/jem.175.1.9] [Citation(s) in RCA: 106] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Injection of adult mice with high doses of monomeric human gamma globulins (dHGG) has been previously shown to produce a state of peripheral tolerance in both B and T cells. To gain insight into the mechanism of induction and maintenance of adult tolerance in this model, we have analyzed the pattern of lymphokines produced by control and tolerant animals in response to the tolerogen. The data presented indicate that HGG-specific, interleukin 2 (IL-2)- and interferon gamma (IFN-gamma)-producing T cells (thus referred to as T helper type 1 [Th1] cells) are rendered unresponsive after in vivo administration of soluble HGG. In contrast, antigenic stimulation of T cells isolated from tolerant adult mice leads to increased production of IL-4 in vitro. In vivo challenge of dHGG-treated adult animals with hapten-coupled HGG (p-azophenylarsonate [ARS]-HGG) induced a significant ARS-specific antibody response, suggesting that tolerance induction in this model does not completely abrogate tolerogen-specific Th activity in vivo. In agreement with the in vitro data, hapten-specific antibody response of tolerant animals is characterized by a selective deficiency in the IFN-gamma-dependent IgG2a subclass. Injection of immunogenic forms of HGG into tolerant animals also produced an IL-4-dependent increase in total serum IgE levels, indicative of an increased activity of HGG-specific Th2 cells in these animals. The finding that tolerance induction differentially affects Th subpopulations suggests that crossregulation among lymphocyte subsets may play a role in the induction and/or maintenance of acquired tolerance in adults.
Collapse
Affiliation(s)
- D De Wit
- Department de Biologie Moleculaire, Université Libre de Bruxelles, Belgium
| | | | | | | | | | | | | | | | | |
Collapse
|