1
|
Botelho Alves P, Pires Pereira H, Cardoso Lopes J, Carrapatoso I, Todo-Bom A, Regateiro FS. Peeling the Peanut: Characterizing Peanut Allergy With the New Food Allergy Severity Score. J Investig Allergol Clin Immunol 2024; 34:125-127. [PMID: 37669079 DOI: 10.18176/jiaci.0935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023] Open
Affiliation(s)
- P Botelho Alves
- Allergy and Clinical Immunology Unit, Coimbra Hospital and University Centre (CHUC), Coimbra, Portugal
| | - H Pires Pereira
- Allergy and Clinical Immunology Unit, Coimbra Hospital and University Centre (CHUC), Coimbra, Portugal
| | - J Cardoso Lopes
- Allergy and Clinical Immunology Unit, Coimbra Hospital and University Centre (CHUC), Coimbra, Portugal
| | - I Carrapatoso
- Allergy and Clinical Immunology Unit, Coimbra Hospital and University Centre (CHUC), Coimbra, Portugal
| | - A Todo-Bom
- Allergy and Clinical Immunology Unit, Coimbra Hospital and University Centre (CHUC), Coimbra, Portugal
- Institute of Immunology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - F S Regateiro
- Allergy and Clinical Immunology Unit, Coimbra Hospital and University Centre (CHUC), Coimbra, Portugal
- Institute of Immunology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| |
Collapse
|
2
|
Cardoso Lopes J, Botelho Alves P, Pires Pereira H, Cunha F, Farinha I, Maresch A, Cunha R, Loureiro G, Todo-Bom A, Tavares B. Molecular profiling in bee venom allergy: clinical and therapeutic characterization in a Portuguese cohort. Eur Ann Allergy Clin Immunol 2024. [PMID: 38376470 DOI: 10.23822/eurannaci.1764-1489.332] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
Summary Background. Bee venom allergy (BVA) can trigger local and systemic allergic reactions, including anaphylaxis. Recently, the molecular sensitization profile has gained importance in the reaction's stratification and venom immunotherapy (VIT). Methods. Retrospective analysis of patients with hypersensitivity to BVA, confirmed by specific sIgE to Apis mellifera ≥0.35 kU/L and/or positive skin tests to bee venom commercial extract, evaluated in specialized consultation. Demographic, clinical, and laboratory data (including molecular Api m 1, 4, and 10) were analyzed, looking for risk factors associated with the severity of the index reaction and reactions during VIT. Results. 93 patients were included (55.9% male; median age of 46 years), 57.3% with atopic comorbidities, and 23.4% with cardiovascular comorbidities. The median specific IgE to Apis mellifera was 6.7 kU/L (IQR 1.0-20.3) kU/L. Regarding the molecular profile, the median IgE to Api m 1 was 0.5 kU/L (57.5% positive out of all measurements); Api m 4 - 0.01 kU/L (11.9% positive), and Api m 10 - 0.3 kU/L (50.0% positive). No patient was monosensitized to Api m 4. The median age of the most severe sting reaction was 36 (IQR 26-48) years, with a median severity (Müeller scale) of 3 (IQR 2-3). Forty-seven patients (50.5%) underwent VIT, with 35.6% of reactions recorded. Allergic reactions during VIT were recorded in 35.6% of cases. The severity of the index reaction correlated positively with older ages (p=0.040; r=0.249), in contrast to monosensitization to Api m 1, which was an independent predictor of milder reactions (p=0.015). Sensitization to Api m 10 was associated with a higher likelihood of reactions during VIT (p=0.038) but potentially less systemic reactions at re-stings (p=0.097). Conclusions. Molecular sensitization profile appears to be relevant not only to the severity of index reactions but also during VIT. Studies of a large cohort of patients with molecular profiles are essential to validate these results and improve the clinical and therapeutic approach to BVA.
Collapse
Affiliation(s)
- J Cardoso Lopes
- Department of Allergy and Clinical Immunology, Coimbra Hospital and University Center, Coimbra, Portugal
| | - P Botelho Alves
- Department of Allergy and Clinical Immunology, Coimbra Hospital and University Center, Coimbra, Portugal
| | - H Pires Pereira
- Department of Allergy and Clinical Immunology, Coimbra Hospital and University Center, Coimbra, Portugal
| | - F Cunha
- Department of Allergy and Clinical Immunology, Coimbra Hospital and University Center, Coimbra, Portugal
| | - I Farinha
- Department of Allergy and Clinical Immunology, Coimbra Hospital and University Center, Coimbra, Portugal
| | - A Maresch
- Department of Clinical Pathology, Coimbra Hospital and University Center, Coimbra, Portugal
| | - R Cunha
- Department of Clinical Pathology, Coimbra Hospital and University Center, Coimbra, Portugal
| | - G Loureiro
- Department of Allergy and Clinical Immunology, Coimbra Hospital and University Center, Coimbra, Portugal
| | - A Todo-Bom
- Department of Allergy and Clinical Immunology, Coimbra Hospital and University Center, Coimbra, Portugal
- Coimbra Clinical Academic Center, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - B Tavares
- Department of Allergy and Clinical Immunology, Coimbra Hospital and University Center, Coimbra, Portugal
| |
Collapse
|
3
|
Botelho Alves P, Pires Pereira H, Costa Carvalho J, Nunes I, Todo-Bom A, Faria E, Regateiro F, Paiva A. Expression of IL-17RA in Innate Cells of Patients with Common Variable Immunodeficiency (CVID) and its Clinical Implications. Eur Ann Allergy Clin Immunol 2024. [PMID: 38259136 DOI: 10.23822/eurannaci.1764-1489.326] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Summary Background. Common Variable Immunodeficiency (CVID) is a primary immunodeficiency disorder characterized by B-cell dysfunction and immunoglobulin production deficiency. Dysregulation of interleukin-17 (IL-17) and its receptor IL-17RA have been reported in various immune disorders. This study aimed to investigate the expression of IL-17RA in innate immune cells of CVID patients and its correlation with clinical manifestations. Methods. A cross-sectional study included 22 CVID patients and 14 age- and sex-matched healthy controls. IL-17RA expression was assessed in various immune cell subsets using flow cytometry. Demographic and clinical data were collected, and statistical analysis was performed. Results. CVID patients had elevated IL-17RA expression in neutrophils, non-classical monocytes, and dendritic cells compared to healthy controls. Patients with a history of intestinal microbial colonization, particularly with Campylobacter jejuni and Giardia intestinalis, showed significantly higher IL-17RA expression in innate cells. Elevated IL-17RA expression in monocytes and dendritic cells also correlated with higher fecal calprotectin levels in CVID patients, regardless of microbial colonization. Conclusions. The study suggests that despite previous reports of reduced circulating Th17 cells and IL-17 levels in CVID patients, IL-17RA expression in innate cells may be elevated, potentially indicating altered IL-17 signaling. This heightened IL-17RA expression could contribute to a persistent pro-inflammatory state, possibly due to microbial translocation or other inflammatory factors. The association of IL-17RA expression with gastrointestinal microbial colonization and its correlation with fecal calprotectin underscores the complexity of IL-17RA's role in CVID pathophysiology. Further research in larger cohorts could elucidate the implications of IL-17RA expression in both infectious and non-infectious inflammatory aspects of CVID.
Collapse
Affiliation(s)
- P Botelho Alves
- Allergy and Clinical Immunology Unit, Coimbra Hospital and University Centre (CHUC), Coimbra, Portugal
| | - H Pires Pereira
- Allergy and Clinical Immunology Unit, Coimbra Hospital and University Centre (CHUC), Coimbra, Portugal
| | - J Costa Carvalho
- Allergy and Clinical Immunology Unit, Coimbra Hospital and University Centre (CHUC), Coimbra, Portugal
| | - I Nunes
- Allergy and Clinical Immunology Unit, Coimbra Hospital and University Centre (CHUC), Coimbra, Portugal
| | - A Todo-Bom
- Allergy and Clinical Immunology Unit, Coimbra Hospital and University Centre (CHUC), Coimbra, Portugal
- Institute of Immunology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - E Faria
- Allergy and Clinical Immunology Unit, Coimbra Hospital and University Centre (CHUC), Coimbra, Portugal
| | - F Regateiro
- Allergy and Clinical Immunology Unit, Coimbra Hospital and University Centre (CHUC), Coimbra, Portugal
- Institute of Immunology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology (CIBB), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - A Paiva
- Flow Cytometry - Pathology Unit, University of Coimbra, Coimbra, Portugal
| |
Collapse
|
4
|
Cardoso Lopes JP, da Costa Carvalho JS, Pires Pereira H, da Costa Farinha IF, Botelho Alves P, da Costa Pimentel F, Ribeiro C, Todo-Bom Ferreira da Costa AMP. Allergic emergencies in the prehospital setting: a 5 year retrospective study. Eur Ann Allergy Clin Immunol 2023. [PMID: 37199382 DOI: 10.23822/eurannaci.1764-1489.297] [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] [Indexed: 05/19/2023]
Abstract
Summary Background. Patients with severe allergic conditions often request support from the prehospital emergency services given the rapid, unexpected and potentially life-threatening nature of the reactions, such as anaphylaxis. Studies regarding prehospital incidents for allergic conditions are scarce. This study aimed to characterize prehospitalar medical requesting assistance due to suspected hypersensitivity reactions (HSR). Methods. Retrospective study of allergic-related requesting assistances between 2017-2022 of a Portuguese emergency dispatch centre - Emergency and Resuscitation Medical Vehicle (VMER), in Coimbra University Hospital. Demographic and clinical variables were analysed, including clinical manifestations, anaphylaxis severity grading, therapeutic interventions, and post-incident allergic work-up. Regarding anaphylactic events, three diagnosis timings were compared: on-site, hospital emergency department and Investigator-diagnosis based on data reviewed. Results. Out of 12689 VMER requesting assistances, 210 (1.7%) were classified as suspected HSR reactions. After on-site medical evaluation, 127 (60.5%) cases maintained the HSR classification (median age 53 years; 56% males) and the main diagnoses included HSR to Hymenoptera venom (29.9%), food allergy (29.1%), and pharmaceutical drugs (25.5%). Anaphylaxis was assumed on-site in 44 (34.7%) cases, in the hospital emergency department in 53 cases (41.7%) and by investigators in 76 (59.8%) cases. Regarding management, epinephrine was administered on-site in 50 cases (39.4%). Conclusions. The main reason for prehospital requesting assistance was HSR to Hymenoptera venom. A high proportion of incidents met the criteria for anaphylaxis and despite the inherent difficulties of the prehospital setting, many of the on-site diagnoses agreed with the criteria. Regarding management, epinephrine was underused in this setting. Referral to specialized consultation is crucial for the management of prehospital incidents.
Collapse
Affiliation(s)
- J P Cardoso Lopes
- Department of Allergy and Clinical Immunology, Coimbra Hospital and University Center, Coimbra, Portugal
| | - J S da Costa Carvalho
- Department of Allergy and Clinical Immunology, Coimbra Hospital and University Center, Coimbra, Portugal
| | - H Pires Pereira
- Department of Allergy and Clinical Immunology, Coimbra Hospital and University Center, Coimbra, Portugal
| | - I F da Costa Farinha
- Department of Allergy and Clinical Immunology, Coimbra Hospital and University Center, Coimbra, Portugal
| | - P Botelho Alves
- Department of Allergy and Clinical Immunology, Coimbra Hospital and University Center, Coimbra, Portugal
| | - F da Costa Pimentel
- National Institute of Medical Emergency, Central Base HUC, Coimbra Hospital and University Center, Coimbra, Portugal
| | - C Ribeiro
- Department of Allergy and Clinical Immunology, Coimbra Hospital and University Center, Coimbra, Portugal
| | - A M P Todo-Bom Ferreira da Costa
- Department of Allergy and Clinical Immunology, Coimbra Hospital and University Center, Coimbra, Portugal
- Coimbra Clinical Academic Center, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| |
Collapse
|
5
|
Regateiro FS, Botelho Alves P, Moura AL, Azevedo JP, Regateiro DT. The diverse roles of T cell subsets in asthma. Eur Ann Allergy Clin Immunol 2020; 53:201-208. [PMID: 33182992 DOI: 10.23822/eurannaci.1764-1489.177] [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] [Indexed: 11/17/2022]
Abstract
Summary T cells are coordinators of the immune response and have been shown to play a central role in the pathophysiology of asthma. A good understanding of the T cells functions in asthma is important for therapeutic reasons, in particular for the choice of biological treatments in severe asthma. Although classically considered a Th2 disease, it is now clear that other types of T cells contribute for the pathophysiology and the heterogeneity of asthma. We here review how the different subsets of T cells are involved in the different phenotypes-endotypes of asthma and how this may influence the treatment of the disease.
Collapse
Affiliation(s)
- F S Regateiro
- Unit of Allergy and Clinical Immunology, University Hospital Center of Coimbra, Coimbra, Portugal.,Institute of Immunology, School of Medicine, University of Coimbra, Coimbra, Portugal.,Coimbra Institute for Clinical and Biomedical Research (iCBR), School of Medicine, University of Coimbra, Portugal
| | - P Botelho Alves
- Unit of Allergy and Clinical Immunology, University Hospital Center of Coimbra, Coimbra, Portugal
| | - A L Moura
- Unit of Allergy and Clinical Immunology, University Hospital Center of Coimbra, Coimbra, Portugal
| | - J P Azevedo
- Institute of Immunology, School of Medicine, University of Coimbra, Coimbra, Portugal.,Hospital CUF Coimbra, Coimbra, Portugal
| | - D T Regateiro
- Department of Biomedical Sciences and Medicine, University of Algarve, Portugal
| |
Collapse
|
6
|
Melo JO, Fachin AL, Rizo WF, Jesus HCR, Arrigoni-Blank MF, Alves PB, Marins MA, França SC, Blank AF. Cytotoxic effects of essential oils from three Lippia gracilis Schauer genotypes on HeLa, B16, and MCF-7 cells and normal human fibroblasts. Genet Mol Res 2014; 13:2691-7. [PMID: 24782082 DOI: 10.4238/2014.april.8.12] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
This study aimed to evaluate the chemical composition of the essential oils from three genotypes of Lippia gracilis Schauer (Verbenaceae) and investigate the cytotoxic activities of these oils. Essential oils were extracted from the leaves using a Clevenger-type apparatus, and chemical analysis was performed using a gas chromatograph coupled to a mass spectrometer and flame ionization detector. 3T3, MRC5, B16, HeLa, and MCF-7 cell lines were used to study the in vitro cytotoxicity of the essential oils, and the level of cell death was determined using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide test with three replicates. The cytotoxic activity was expressed as the concentration that inhibited 50% of cell growth. The main compound in the essential oil of LGRA-106 was thymol (40.52%), while LGRA-109 and LGRA-201 contained 45.84 and 32.60% carvacrol, respectively, as their major compound. The essential oils of L. gracilis showed cytotoxic activity against both normal and tumor cells at concentrations below 100 μg/mL; this demonstrated the antitumor potential of these essential oils, which should be further investigated.
Collapse
Affiliation(s)
- J O Melo
- Programa de Pós-Graduação em Biotecnologia de Recursos Naturais, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
| | - A L Fachin
- Programa de Pós-Graduação em Biotecnologia, Universidade de Ribeirão Preto, Ribeirão Preto, SP, Brasil
| | - W F Rizo
- Programa de Pós-Graduação em Biotecnologia, Universidade de Ribeirão Preto, Ribeirão Preto, SP, Brasil
| | - H C R Jesus
- Departamento de Química, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
| | - M F Arrigoni-Blank
- Programa de Pós-Graduação em Biotecnologia de Recursos Naturais, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
| | - P B Alves
- Departamento de Química, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
| | - M A Marins
- Programa de Pós-Graduação em Biotecnologia, Universidade de Ribeirão Preto, Ribeirão Preto, SP, Brasil
| | - S C França
- Programa de Pós-Graduação em Biotecnologia, Universidade de Ribeirão Preto, Ribeirão Preto, SP, Brasil
| | - A F Blank
- Programa de Pós-Graduação em Biotecnologia de Recursos Naturais, Universidade Federal de Sergipe, São Cristóvão, SE, Brasil
| |
Collapse
|
7
|
Mendes SS, Bomfim RR, Jesus HCR, Alves PB, Blank AF, Estevam CS, Antoniolli AR, Thomazzi SM. Evaluation of the analgesic and anti-inflammatory effects of the essential oil of Lippia gracilis leaves. J Ethnopharmacol 2010; 129:391-397. [PMID: 20420889 DOI: 10.1016/j.jep.2010.04.005] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2010] [Revised: 03/14/2010] [Accepted: 04/10/2010] [Indexed: 05/29/2023]
Abstract
AIM OF THE STUDY The aim of the present study is to investigate the antinociceptive, anti-inflammatory, and antioxidant activities of essential oil (EO) of Lippia gracilis Schauer (Verbenaceae) leaves to support the medicinal uses claimed by folklore practitioners in the caatinga region (semi-arid) of Northeastern Brazil. MATERIALS AND METHODS The chemical composition and antinociceptive and anti-inflammatory activities of the EO of Lippia gracilis leaves (50-200 mg/kg) were investigated. Antinociceptive activity of the EO was evaluated by writhing test. Anti-inflammatory activity of the EO was evaluated using paw oedema and peritonitis methods. RESULTS Oral treatment with the EO of Lippia gracilis leaves elicited inhibitory activity on acetic acid effect at 50, 100, and 200 mg/kg (30.33+/-2.36, 25.20+/-1.48, and 21.00+/-1.54 abdominal writhes, respectively, P<0.05), as compared with the control group (36.73+/-1.92 writhes). The compound acetylsalicylic acid (ASA, 300 mg/kg) inhibited the acetic acid-induced writhing (12.67+/-0.50 abdominal writhes, P<0.001). Carrageenan-induced oedema formation was reduced with the EO of Lippia gracilis leaves at 200 mg/kg (0.72+/-0.06 mL h, P<0.001) and by the reference compound ASA (300 mg/kg, 0.85+/-0.04 mL h, P<0.001), as compared with the control group (1.76+/-0.06 mL h). Leukocyte migration into the peritoneal cavity induced by carrageenan was reduced with the EO of Lippia gracilis leaves at 50, 100, and 200 mg/kg (13.81+/-0.61, 11.77+/-0.91, and 10.30+/-0.60 leukocytes x 10(6)/mL, respectively, P<0.01), and by the compound dexamethasone (2 mg/kg, 5.34+/-0.33 leukocytes x 10(6)/mL, P<0.001), as compared with the control group (16.71+/-0.54 leukocytes x 10(6)/mL). The analyses of the essential oil allowed the identification of Lippia gracilis as a thymol-p-cymene chemotype (32.68% and 17.82%, respectively). CONCLUSIONS The EO of Lippia gracilis leaves shows antinociceptive and anti-inflammatory activities.
Collapse
Affiliation(s)
- S S Mendes
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
| | | | | | | | | | | | | | | |
Collapse
|
8
|
Cavalcanti SCH, Niculau EDS, Blank AF, Câmara CAG, Araújo IN, Alves PB. Composition and acaricidal activity of Lippia sidoides essential oil against two-spotted spider mite (Tetranychus urticae Koch). Bioresour Technol 2010; 101:829-832. [PMID: 19758799 DOI: 10.1016/j.biortech.2009.08.053] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2008] [Revised: 08/06/2009] [Accepted: 08/07/2009] [Indexed: 05/28/2023]
Abstract
The essential oils from accessions of Lippia sidoides Cham. (Verbenaceae) were characterized by GC and GC/MS and investigated for their acaricidal activity against the two-spotted spider mite (Tetranychus urticae Koch). Twenty-nine compounds were identified with potential acaricidal activity. Glass receptacles were used as test chambers. For each dose and exposure time combination, three replicates were used. Each replicate consisted of 30 adult females of T. urticae, 10 mites in each leaf disk of Canavalia ensiformis placed in a Petri dish. Increasing amounts of oil or terpene were applied on a blotting paper strip, fixed on the inner surface of the glass recipient cover, corresponding to 2, 4, 6, 8, and 10 microL/L of air, respectively. Exposure periods were 24, 48, and 72 h. Data obtained in these experiments were submitted to probit analysis. The essential oil of L. sidoides, thymol and carvacrol exhibited potent acaricidal activity against T. urticae.
Collapse
Affiliation(s)
- S C H Cavalcanti
- Departamento de Fisiologia, Universidade Federal de Sergipe, Av. Marechal Rondon S/N, CEP 49100-000, São Cristóvão-SE, Brazil
| | | | | | | | | | | |
Collapse
|
9
|
Quintans-Júnior LJ, Souza TT, Leite BS, Lessa NMN, Bonjardim LR, Santos MRV, Alves PB, Blank AF, Antoniolli AR. Phythochemical screening and anticonvulsant activity of Cymbopogon winterianus Jowitt (Poaceae) leaf essential oil in rodents. Phytomedicine 2008; 15:619-24. [PMID: 17976969 DOI: 10.1016/j.phymed.2007.09.018] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2007] [Accepted: 09/05/2007] [Indexed: 05/13/2023]
Abstract
Cymbopogon winterianus (Poaceae) is used for its analgesic, anxiolytic and anticonvulsant properties in Brazilian folk medicine. This report aimed to perform phythochemical screening and to investigate the possible anticonvulsant effects of the essential oil (EO) from fresh leaves of C. winterianus in different models of epilepsy. The phytochemical analysis of EO showed presence of geraniol (40.06%), citronellal (27.44%) and citronellol (10.45%) as the main compounds. A behavioral screening demonstrated that EO (100, 200 and 400mg/kg; ip) caused depressant activity on CNS. When administered concurrently, EO (200 and 400mg/kg, ip) significantly reduced the number of animals that exhibited PTZ- and PIC-induced seizures in 50% of the experimental animals (p<0.05). Additionally, EO (100, 200 and 400mg/kg, ip) significantly increased (p<0.05) the latencies of clonic seizures induced by STR. Our results demonstrated a possible activity anticonvulsant of the EO.
Collapse
Affiliation(s)
- L J Quintans-Júnior
- Departamento de Fisiologia, Universidade Federal de Sergipe, Campus Universitário Prof. Aloísio de Campos, CEP 49100-000 São Cristóvão, SE, Brazil.
| | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Silva WJ, Dória GAA, Maia RT, Nunes RS, Carvalho GA, Blank AF, Alves PB, Marçal RM, Cavalcanti SCH. Effects of essential oils on Aedes aegypti larvae: alternatives to environmentally safe insecticides. Bioresour Technol 2008; 99:3251-5. [PMID: 17662602 DOI: 10.1016/j.biortech.2007.05.064] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2005] [Revised: 05/14/2007] [Accepted: 05/14/2007] [Indexed: 05/16/2023]
Abstract
The essential oils from leaves of Hyptis fruticosa (Lamiaceae) Salzm., H. pectinata (Lamiaceae) Poit., and Lippia gracilis (Verbenaceae) HBK were investigated for their larvicidal activity against Aedes aegypti and analyzed by GC/MS. Fifty-nine compounds, representing 91.28-98.39% of the essential oils, have been identified. A standard solution was used to make 20 mL solutions ranging from 30 to 2000 ppm. Twenty larvae between third and fourth stages were added to the essential oil solution. A mortality count was conducted 24 h after treatment. Essential oils LC50 and their confidence limits at 95% probability were calculated by the methods of Reed-Muench and Pizzi, respectively. The essential oil of Lippia gracilis showed potent insecticidal effect against Aedes aegypti larvae, the vector of dengue fever. Carvacrol and caryophyllene oxide were the main responsible for the activity of L. gracilis and H. pectinata. Minor compounds are probably acting synergistically to achieve H. fruticosa activity.
Collapse
Affiliation(s)
- W J Silva
- Physiology Department, Federal University of Sergipe, Caixa Postal 52, CEP, 490001-970 Aracaju, SE, Brazil
| | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Arrigoni-Blank MF, Antoniolli AR, Caetano LC, Campos DA, Blank AF, Alves PB. Antinociceptive activity of the volatile oils of Hyptis pectinata L. Poit. (Lamiaceae) genotypes. Phytomedicine 2008; 15:334-339. [PMID: 17950588 DOI: 10.1016/j.phymed.2007.09.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Hyptis pectinata L. Poit (Lamiaceae) is known popularly in Brazil as "sambacaita" or "canudinho" and is used in the treatment of inflammations, bacterial infections and ache. The antinociceptive activity of the volatile oils of six genotypes, at doses of 100, 200 and 400mg/kg body wt., were investigated using abdominal writhe models induced by acetic acid and hot plate tests. The volatile oils of all the genotypes are composed mainly of sesquiterpenoids. All the genotypes showed antinociceptive effects in both models used; the SAM002 genotype showed the major inhibitory effect at dose of 100mg/kg body wt. These results suggest that the volatile oil of H. pectinata has peripheral (writhe reduction) and central (time delay of thermal reaction) effects. These observations indicate that H. pectinata may be useful as an analgesic drug.
Collapse
Affiliation(s)
- M F Arrigoni-Blank
- Núcleo de Ciências Biológicas, Campus Prof. Alberto Carvalho, Universidade Federal de Sergipe, Itabaiana, Av. Vereador Olímpio Grande s/n, 49500-000 Sergipe, Brazil.
| | | | | | | | | | | |
Collapse
|
12
|
Santos MRV, Carvalho AA, Medeiros IA, Alves PB, Marchioro M, Antoniolli AR. Cardiovascular effects of Hyptis fruticosa essential oil in rats. Fitoterapia 2007; 78:186-91. [PMID: 17343989 DOI: 10.1016/j.fitote.2006.11.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [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: 11/08/2005] [Accepted: 11/17/2006] [Indexed: 11/25/2022]
Abstract
In non-anesthetized normotensive rats, Hyptis fruticosa essential oil (HFEO, 5, 10, 20 and 40 mg/kg; i.v.) induced hypotension associated with tachycardia. In intact and isolated rings of rat superior mesenteric artery (control), HFEO (1-1000 microg/ml, n=6, cumulatively) induced concentration-dependent relaxations of tonus induced by 10 microM phenylephrine (Phe) (pD(2)=2.6+/-0.27; E(max)=64+/-8.3%). In denuded endothelium pre-contracted rings with Phe or K(+)-depolarizing solution (80 mM), the concentration-response curves to HFEO were not shifted (pD(2)=2.3+/-0.25 and 2.3+/-0.28, respectively), but their maximal responses were significantly (P<0.05 vs control) increased (E(max)=122.3+/-18.2% and 92+/-3.6%, respectively). HFEO was also capable of antagonizing the concentration-response curves to CaCl(2) (3 microM-30 mM) in a dose-dependent manner.
Collapse
Affiliation(s)
- M R V Santos
- Laboratório de Farmacologia Cardiovascular, Universidade Federal de Sergipe, Av. Marechal Rondon, S/N, Rosa Elze, CEP: 49100-000, São Cristóvão, SE, Brazil.
| | | | | | | | | | | |
Collapse
|
13
|
Dantas MC, De Oliveira FS, Bandeira SM, Batista JS, Silva CD, Alves PB, Antoniolli AR, Marchioro M. Central nervous system effects of the crude extract of Erythrina velutina on rodents. J Ethnopharmacol 2004; 94:129-133. [PMID: 15261973 DOI: 10.1016/j.jep.2004.05.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2001] [Revised: 05/06/2004] [Accepted: 05/10/2004] [Indexed: 05/24/2023]
Abstract
The aqueous extract (AE) of Erythrina velutina prolonged the sleep duration induced by sodium pentobarbital (control: 6.4 +/- 1.2 min; extract 10 mg/kg, 47.1 +/- 3.9 min; extract 100 mg/kg, 109.4 +/- 7.2 min; F = 243, P < 0.001). In the open field, the extract at the doses of 10 and 50 mg/kg did not changed the number of crossings, rearings nor groomings. On the other hand, at the dose of 200 mg/kg it reduced the number of crossings (q = 6.25, P < 0.05) and groomings (q = 3.91, P < 0.05). When exposed during three consecutive days to the open field, the control animals showed habituation for crossings (F = 17.56, P < 0.001) and rearings (F = 14.01, P < 0.001). The same was not true for animals treated with 10 mg/kg of the extract (crossings: F = 3.59, P > 0.05; rearings: F = 3.62, P > 0.05). At the same dose, the extract blocked the acquisition of foot shock memory (P = 0.9219) when compared to the control values (P = 0.0078). Our data showed that the crude extract of Erythrina velutina at lower doses interferes with mnemonic process for different tasks, while at higher doses, the sedative and neuromuscular blocking actions are the main effects.
Collapse
Affiliation(s)
- M C Dantas
- Laboratório de Neurofisiologia, Departamento de Fisiologia, Universidade Federal de Sergipe, São Cristóvão-SE 49100-000, Brazil
| | | | | | | | | | | | | | | |
Collapse
|