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Guerreiro E, Botelho J, Machado V, Proença L, Mendes JJ, Manso AC. Caries Experience before and after COVID-19 Restrictions: An Observational Study. J Clin Med 2024; 13:1164. [PMID: 38398476 PMCID: PMC10889374 DOI: 10.3390/jcm13041164] [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] [Received: 01/12/2024] [Revised: 02/01/2024] [Accepted: 02/17/2024] [Indexed: 02/25/2024] Open
Abstract
Background: The declaration of COVID-19 as a pandemic by the World Health Organization in 2020 led to the suspension of several clinical practices globally, including dentistry. This study investigates the impact of these restrictions on dental caries experience. Methods: A retrospective cross-sectional study was conducted at Egas Moniz University's dental hospital in the Lisbon Metropolitan Area from June 2019 to June 2021. The study involved 3380 participants who were divided into two cohorts: after and before COVID-19 restrictions. Data collection included a questionnaire, full-mouth clinical examinations, and radiographs (panoramic X-rays, bitewings). Results: Before the COVID-19 restrictions, the prevalence of dental caries was 91.8%, with an average DMFT (decayed, missing, and filled teeth) index of 12.13. Post-restrictions, the prevalence decreased to 84.5%, with a DMFT index of 10.99. There was an increase in missing teeth and a decrease in decayed and filled teeth. Additionally, the frequency of toothbrushing declined among participants. Conclusions: The COVID-19 pandemic restrictions have significantly impacted dental caries experiences and oral health, highlighting a decrease in dental caries, but also a concerning reduction in oral hygiene practices. These results emphasize the importance of customized dental healthcare during public health emergencies to reduce impacts and maintain oral health.
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Affiliation(s)
- Eduardo Guerreiro
- Egas Moniz Center for Interdisciplinary Research (CiiEM), Egas Moniz School of Health & Science, Caparica, 2829-511 Almada, Portugal
- Biomedicine Doctoral Program, Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto, 4050-313 Porto, Portugal; (J.B.); (V.M.); (L.P.); (J.J.M.); (A.C.M.)
| | - João Botelho
- Biomedicine Doctoral Program, Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto, 4050-313 Porto, Portugal; (J.B.); (V.M.); (L.P.); (J.J.M.); (A.C.M.)
| | - Vanessa Machado
- Biomedicine Doctoral Program, Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto, 4050-313 Porto, Portugal; (J.B.); (V.M.); (L.P.); (J.J.M.); (A.C.M.)
| | - Luís Proença
- Biomedicine Doctoral Program, Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto, 4050-313 Porto, Portugal; (J.B.); (V.M.); (L.P.); (J.J.M.); (A.C.M.)
| | - José João Mendes
- Biomedicine Doctoral Program, Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto, 4050-313 Porto, Portugal; (J.B.); (V.M.); (L.P.); (J.J.M.); (A.C.M.)
| | - Ana Cristina Manso
- Biomedicine Doctoral Program, Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto, 4050-313 Porto, Portugal; (J.B.); (V.M.); (L.P.); (J.J.M.); (A.C.M.)
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Guerreiro E, Botelho J, Machado V, Proença L, Mendes JJ, Manso AC. Caries Experience and Risk Indicators in a Portuguese Population: A Cross-Sectional Study. Int J Environ Res Public Health 2023; 20:2511. [PMID: 36767876 PMCID: PMC9915840 DOI: 10.3390/ijerph20032511] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 01/23/2023] [Accepted: 01/28/2023] [Indexed: 06/18/2023]
Abstract
Oral health surveys are essential for assessing the dental caries experience and to influence national policies. This retrospective cross-sectional study aims to analyze dental caries experience for which dental treatment was sought in a reference university dental hospital at the Lisbon Metropolitan Area between January 2016 and March 2020. Full-mouth examination, and sociodemographic, behavior, and medical information were included. Descriptive analyses and logistic regression analysis were applied to ascertain risk indicators associated with dental caries experience. A final sample of 9349 participants (5592 females/3757 males) were included, aged 18 to 99 years old. In this population, caries experience was 91.1%, higher in female participants. Age (OR = 1.01, 95% CI [1.00-1.02], occupation (OR = 2.94, 95% CI [2.37-3.65], OR = 3.35, 95% CI [2.40-4.67], OR = 2.55, 95% CI [1.66-3.91], for employed, unemployed, and retired, respectively), overweight (OR = 1.52, 95% CI [1.18-1.96]), reporting to have never visited a dentist (OR = 0.38, 95% CI [0.23-0.64], and self-reported week teeth status (OR = 2.14, 95% CI [1.40-3.28]) were identified as risk indicators for the presence of dental caries, according to adjusted multivariable logistic analyses. These results highlight a substantial rate of dental experience in a Portuguese cohort and will pave the way for future tailored oral public health programs in Portugal.
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Affiliation(s)
- Eduardo Guerreiro
- Clinical Research Unit (CRU), Egas Moniz Center for Interdisciplinary Research, Egas Moniz—School of Health and Science, 2829-511 Almada, Portugal
| | - João Botelho
- Clinical Research Unit (CRU), Egas Moniz Center for Interdisciplinary Research, Egas Moniz—School of Health and Science, 2829-511 Almada, Portugal
- Evidenced-Based Hub, Egas Moniz Center for Interdisciplinary Research, Egas Moniz—School of Health and Science, 2829-511 Almada, Portugal
| | - Vanessa Machado
- Clinical Research Unit (CRU), Egas Moniz Center for Interdisciplinary Research, Egas Moniz—School of Health and Science, 2829-511 Almada, Portugal
- Evidenced-Based Hub, Egas Moniz Center for Interdisciplinary Research, Egas Moniz—School of Health and Science, 2829-511 Almada, Portugal
| | - Luís Proença
- Clinical Research Unit (CRU), Egas Moniz Center for Interdisciplinary Research, Egas Moniz—School of Health and Science, 2829-511 Almada, Portugal
- Evidenced-Based Hub, Egas Moniz Center for Interdisciplinary Research, Egas Moniz—School of Health and Science, 2829-511 Almada, Portugal
| | - José João Mendes
- Clinical Research Unit (CRU), Egas Moniz Center for Interdisciplinary Research, Egas Moniz—School of Health and Science, 2829-511 Almada, Portugal
- Evidenced-Based Hub, Egas Moniz Center for Interdisciplinary Research, Egas Moniz—School of Health and Science, 2829-511 Almada, Portugal
| | - Ana Cristina Manso
- Clinical Research Unit (CRU), Egas Moniz Center for Interdisciplinary Research, Egas Moniz—School of Health and Science, 2829-511 Almada, Portugal
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Diaby O, Sanchez C, Guerreiro E. Évaluation de la croissance microbienne au sein de mélanges de nutrition parentérale (MNP). NUTR CLIN METAB 2021. [DOI: 10.1016/j.nupar.2021.01.075] [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: 10/21/2022]
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Vinagreiro M, Valverde JN, Alves D, Costa M, Gouveia P, Guerreiro E. Walking Clinic in ambulatory surgery--A patient based concept: A Portuguese pioneer project. Int J Surg 2015; 18:174-7. [PMID: 25907327 DOI: 10.1016/j.ijsu.2015.04.042] [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] [Received: 01/03/2015] [Revised: 03/06/2015] [Accepted: 04/11/2015] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Walking Clinic is an innovative, efficient and easily reproducible concept adapted to ambulatory surgery. It consists of a preoperative single day work-up, with a surgeon, an anesthetist and a nurse. The aim of this study was to evaluate patient satisfaction and its determinants. METHODS A survey was applied to 171 patients (101 of the Walking Clinic group and 70 not engaged in this new concept). Patient satisfaction was assessed evaluating five major questionnaire items: secretariat (quality of the information and support given), physical space (overall comfort and cleanliness), nurses and medical staff (willingness and expertise), and patients (waiting time until pre-operative consults and exams, waiting time until being scheduled for surgery, surgery day waiting time and postoperative pain control). Furthermore, overall assessment of the received treatment, and probability of patient recommending or returning to our ambulatory unit were also analyzed. RESULTS Walking Clinic group had overall better results in the five major questionnaire items assessed, with statistical significance, except for the physical space. It also showed better results regarding the sub-items postoperative pain control, waiting time until being scheduled for surgery and surgery day waiting time. DISCUSSION The results confirm better patient satisfaction with this new concept. CONCLUSION The Walking Clinic concept complements all the tenets of ambulatory surgery, in a more efficient manner.
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Affiliation(s)
- M Vinagreiro
- Department of Surgery, Hospital Pedro Hispano, Rua Dr. Eduardo Torres, Senhora da Hora, 4464-513 Porto, Portugal.
| | - J N Valverde
- Department of Surgery, Hospital Pedro Hispano, Rua Dr. Eduardo Torres, Senhora da Hora, 4464-513 Porto, Portugal
| | - D Alves
- Department of Surgery, Hospital Pedro Hispano, Rua Dr. Eduardo Torres, Senhora da Hora, 4464-513 Porto, Portugal
| | - M Costa
- School of Technology and Management of Águeda, University of Aveiro, Apartado 473, 3754-909 Águeda, Portugal
| | - P Gouveia
- Department of Surgery, Hospital Pedro Hispano, Rua Dr. Eduardo Torres, Senhora da Hora, 4464-513 Porto, Portugal
| | - E Guerreiro
- Department of Surgery, Hospital Pedro Hispano, Rua Dr. Eduardo Torres, Senhora da Hora, 4464-513 Porto, Portugal
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Donadel OJ, Guerreiro E, María AO, Wendel G, Enriz RD, Giordano OS, Tonn CE. Gastric cytoprotective activity of ilicic aldehyde: Structure–activity relationships. Bioorg Med Chem Lett 2005; 15:3547-50. [PMID: 15963720 DOI: 10.1016/j.bmcl.2005.05.053] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2005] [Revised: 05/16/2005] [Accepted: 05/17/2005] [Indexed: 10/25/2022]
Abstract
A series of sesquiterpene compounds possessing both eudesmane and eremophilane skeletons were tested as gastric cytoprotective agents on male Wistar rats. The presence of an alpha,beta-unsaturated aldehyde on the C-7 side chain together with a hydroxyl group at C-4 is the requirement for the observed antiulcerogenic activity. In an attempt to establish new molecular structural requirements for this gastric cytoprotective activity, a structure-activity study was performed.
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Affiliation(s)
- Osvaldo J Donadel
- INTEQUI-CONICET, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700 San Luis, Argentina.
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Ardanaz CE, Tonn CE, Donadel OJ, Guerreiro E, Kurina MB. Mass spectral studies of a sesquiterpene: 1(10),2,11(13)-eremophylatrien-12-oic acid. Rapid Commun Mass Spectrom 2004; 18:1407-1410. [PMID: 15174199 DOI: 10.1002/rcm.1494] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
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Guardia T, Juarez AO, Guerreiro E, Guzmán JA, Pelzer L. Anti-inflammatory activity and effect on gastric acid secretion of dehydroleucodine isolated from Artemisia douglasiana. J Ethnopharmacol 2003; 88:195-8. [PMID: 12963142 DOI: 10.1016/s0378-8741(03)00211-3] [Citation(s) in RCA: 17] [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 effect of Dehydroleucodine (DhL) on gastric acid secretion in rats was investigated at a dose of 40 mg/kg, while its anti-inflammatory effect was investigated in two experimental models: arthritis induced by Freund's adjuvant carrageenan- and cotton pellet-induced granuloma. DhL did not inhibit gastric acid secretion, suggesting that its anti-ulcerogenic effect can be attributed to its action on the mucosa defense factors. On the other hand, DhL inhibited both chronic and acute adjuvant carrageenan-induced inflammation phases, being most effective in the chronic phase. In the granuloma test, DhL also inhibited inflammation. It is suggested that the anti-inflammatory activity of DhL may be attributed to interference with multiple targets on the level of transcription factors, such as NF-kappaB, and cytokines.
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Affiliation(s)
- T Guardia
- Pharmacology Unit, Department of Pharmacy, Faculty of Chemistry, Biochemistry and Pharmacy, National University of San Luis, Chacabuco and Pedernera, C.P. 5.700, San Luis, Argentina.
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Carrizo FR, Pous L, Kurina SM, Ardanaz C, Guerreiro E. Bioconversion of ilicic alcohol and derivatives with cultures of filamentous fungi. Nat Prod Lett 2002; 16:9-14. [PMID: 11942687 DOI: 10.1080/1057563029001/4782] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Aspergillus niger cultures monohydroxylate ilicic alcohol in C-3 in a cis position with respect to the methyl groups at C-4 and C-10, and trans position with respect to the hydroxyl group of C-4. Furthermore, Aspergillus niger cultures reduce ilicic aldehyde to its corresponding alcohol.
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Sartor T, Elis Lopez M, Gutierrez L, Guerreiro E, Giordano OS, López LA. The sesquiterpene lactone dehydroleucodine reversibly inhibits Allium cepa L. root growth. BIOCELL 2001; 25:29-34. [PMID: 11387874] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
Here, we prove that dehydroleucodine, a sesquiterpene lactone, at low concentrations (25-100 microM) slowed down the Allium cepa L root growth by 22-70% respectively neither affecting cell viability nor cell size. Removal of the drug after 24 h incubation restored the normal growth rate of the roots. Higher concentrations (200 microM) of dehydroleucodine were deleterious for the roots. As cell size did not change, it is most likely that dehydroleucodine affected some event of cell division cycle making it longer. Thus, dehydroleucodine could be a useful tool to slow down cell proliferation.
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Affiliation(s)
- T Sartor
- Instituto de Histología y Embriología, Facultad de Ciencias Médicas U.N. Cuyo Mendoza Argentina
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Abstract
The charge (relative concentration) of antioxidants in aqueous extract and dehydroleucodine (DhL) from Artemisia douglasiana Besser was determined employing a procedure based on the quenching of luminol-enhanced chemiluminescence. Total reactive antioxidant potential (TRAP) and total antioxidant reactivity (TAR) values were determined. The data reported in the present work indicate that the extract of Artemisia douglasiana Besser and DhL showed antioxidant capacity. This activity is more pronounced in the extract, suggesting the presence of several antioxidants in Artemisia douglasiana.
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Affiliation(s)
- A O María
- Cátedra de Farmacología, Universidad Nacional de San Luis, San Luis, Argentina.
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Kurina Sanz M, Hernandez XE, Tonn CE, Guerreiro E. Enhancement of tessaric acid production in Tessaria absinthioides cell suspension cultures. Plant Cell Rep 2000; 19:821-824. [PMID: 30754876 DOI: 10.1007/s002990000192] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The total production of the sesquiterpene tessaric acid (TA) by cell cultures of Tessaria absinthioides at day 25 of the culture period reached 0.086 mg g-1 DW, with intracellular accumulation accounting for 0.059 mg g-1 DW. Dimethylsulfoxide-induced permeabilization of the cells effected both total production and extracellular accumulation of the sesquiterpene to reach levels of 148% and 271%, respectively. Cultures treated with elicitor preparations of Verticillum sp., Monodyctis cataneae, Acremonium sp., and Aspergillus niger produced TA at levels of 281%, 197%, 149%, and 139%, respectively. Treatment of cell suspension cultures with cis-(-)-jasmonic acid (5 μM) increased production to 267%, whereas jasmonic acid pretreatment and subsequent elicitation raised external tessaric acid to 702%.
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Affiliation(s)
- M Kurina Sanz
- Area de Química Orgánica (INTEQUI-CONICET), Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700 San Luis, Argentina e-mail: Fax: +542652-426711, , , , , , AR
| | - X E Hernandez
- Area de Química Orgánica (INTEQUI-CONICET), Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700 San Luis, Argentina e-mail: Fax: +542652-426711, , , , , , AR
| | - C E Tonn
- Area de Química Orgánica (INTEQUI-CONICET), Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700 San Luis, Argentina e-mail: Fax: +542652-426711, , , , , , AR
| | - E Guerreiro
- Area de Química Orgánica (INTEQUI-CONICET), Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700 San Luis, Argentina e-mail: Fax: +542652-426711, , , , , , AR
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Maria AO, Donadel S, Wendel GH, Guzman JA, Guerreiro E, Giordano OS. Gastric anti-ulcer activity of several alpha,beta-unsaturated carbonyl compounds in rats. Biol Pharm Bull 2000; 23:555-7. [PMID: 10823663 DOI: 10.1248/bpb.23.555] [Citation(s) in RCA: 19] [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: 11/22/2022]
Abstract
The gastric cytoprotective activity of several molecules containing an alpha,beta-unsaturated carbonyl system is reported. We attributed this gastroprotective activity to the presence of a non-hindered Michael acceptor in the molecules assayed and suggested that the mechanism of protection would involve, at least in part, a nucleophilic attack of the sulphydryl group of the gastric mucosa to the beta carbon of the Michael acceptors of the compounds assayed.
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Affiliation(s)
- A O Maria
- Departamento de Farmacología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Argentina.
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Brengio SD, Belmonte SA, Guerreiro E, Giordano OS, Pietrobon EO, Sosa MA. The sesquiterpene lactone dehydroleucodine (DhL) affects the growth of cultured epimastigotes of Trypanosoma cruzi. J Parasitol 2000; 86:407-12. [PMID: 10780563 DOI: 10.1645/0022-3395(2000)086[0407:tsldda]2.0.co;2] [Citation(s) in RCA: 34] [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] [Indexed: 11/10/2022] Open
Abstract
Here, we report an inhibitory effect of a sesquiterpene lactone dehydroleucodine (DhL) on the growth of Trypanosoma cruzi in culture. At concentrations of the drug between 5 and 10 microg/ml in the medium,the parasites remained alive for at least 4 days. Higher concentrations of DhL were lethal for the parasites within a few hours. The effect of DhL is irreversible. Morphological changes induced by DhL were also observed in the parasites. The effect of DhL was blocked by the presence of reducing substrates such as glutathione or dithiothreitol, but these agents were not able to reverse the effect of DhL if added 2 days after the start of drug exposure.
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Affiliation(s)
- S D Brengio
- Instituto de Histología y Embriología, Facultad de Ciencias Médicas, Universidad Nacional de Cuyo, Mendoza, Argentina
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Brengio SD, Belmonte SA, Guerreiro E, Giordano OS, Pietrobon EO, Sosa MA. The Sesquiterpene Lactone Dehydroleucodine (DhL) Affects the Growth of Cultured Epimastigotes of Trypanosoma cruzi. J Parasitol 2000. [DOI: 10.2307/3284787] [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: 11/10/2022] Open
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Wendel GH, Maria AO, Mohamed F, Dominguez S, Scardapane L, Giordano OS, Guerreiro E, Guzman JA. Effect of dehydroleucodine in experimental colitis in rats and mice. Pharmacol Res 1999; 40:339-44. [PMID: 10527646 DOI: 10.1006/phrs.1999.0521] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [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: 12/19/2022]
Abstract
Dehydroleucodine (DhL), a sesquiterpene lactone (SQL) of the guaianolide type isolated from Artemisia douglasiana Besser, shows a pharmacological cytoprotective effect and significantly prevents the formation of gastric and duodenal lesions induced by various necrotising agents in rodents. The effects of DhL, on two models of experimental colitis were examined. Colitis was produced in male Wistar rats by rectal instillation of 5 and 10% acetic acid, following the methods of Eliakim et al. and Le Duc et al., respectively. In mice colitis was produced by rectal instillation of 0.1 ml of 2,4,6-trinitrobenzene sulphonic acid (5 mg in 50% ethanol) (TNB) as previously described by Chin et al. In this study, the administration of DhL 40 mg kg(-1)(1 h before the induction of colitis) significantly decreased mucosal damage. This effect was consistent in both models. The protection provided by DhL was accompanied by significant decreases in diarrhoea and colon weight; and histologically normal mucosa without ulceration and mucus production were observed. This study shows that both TNB and acetic acid colitis can be pharmacologically controlled by DhL. Our results suggest that the protective activity of DhL in experimental colitis is mediated, at least in part, through the increase of glycoprotein synthesis, anti-inflammatory effect and inhibition of COX-2 induction, and by inhibiting the degranulation of cells containing monoamines.
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Affiliation(s)
- G H Wendel
- Departamento de Farmacología, Departamento de Embriología e Histologia, Departamento de Química Orgánica, Universidad Nacional deSan Luis, Chacabuco y Pedernera, San Luis, 5700, Argentina
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Pous L, Carrizo R, Donadel O, Sanz MK, Guerreiro E. Hydroxylation of Ilicic Acid by Bioconversion with Cultures ofCunningamella Echinulata. ACTA ACUST UNITED AC 1998. [DOI: 10.1080/10575639808048295] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Favier L, Tonn C, Guerreiro E, Rotelli A, Pelzer L. Anti-inflammatory activity of acetophenones from Ophryosporus axilliflorus. Planta Med 1998; 64:657-659. [PMID: 9810273 DOI: 10.1055/s-2006-957543] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Seven acetophenone derivatives were isolated from the aerial parts of Ophryosporus axilliflorus (Griseb.) Hieron. These compounds were subjected to the carrageenan-induced mouse paw edema test where tremetone (7) showed extremely anti-inflammatory activity. Furthermore, the non-benzofuran acetophenones 5 and 6, showed a significant response.
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Carrizo R, Sosa ME, Favier LS, Penna F, Guerreiro E, Giordano OS, Tonn CE. Growth-inhibitory activities of benzofuran and chromene derivatives toward Tenebrio molitor. J Nat Prod 1998; 61:1209-1211. [PMID: 9784153 DOI: 10.1021/np9800248] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Growth-inhibitory activities of selected natural benzofurans (4-9), trans-cinnamic acid derivatives (10-13), chromene compounds (14 and 16), and some semisynthetic derivatives were determined in last instar larvae of Tenebrio molitor via topical administration in Me2CO. The most inhibitory of the tested compounds were 3-gamma, gamma-dimethylallyl-p-coumaric acid (10) and the benzofuran derivative 12-(p-cumaroyloxy)-tremetone (5), the former compound acting on the pupae and the latter on the last instar larvae. Several developmental deficiencies were observed, and some structure-activity relationships are discussed.
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Affiliation(s)
- R Carrizo
- Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700, San Luis, Argentina
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Abstract
The antiinflammatory activities of 30 flavonoids isolated from several plants of the Compositae family were investigated using carrageenan-induced mouse paw edema and cotton pellet-induced rat granuloma. Compounds were administered with a unique dose of 75 mg/kg i.p. in the acute test with carrageenan and 25 mg/kg/day in the chronic granuloma test. Flavonoids inhibit the development of the induced granuloma, mostly when a catechol or guaiacol-like B ring is contained in the compound structure, jaceosidin being the most active flavonoid screened. Flavonoids significantly inhibited the maximum edema response in the acute test. We conclude that several of the isolated flavonoids tested here showed antiinflammatory effects, depending on the experimental model used.
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Affiliation(s)
- L E Pelzer
- Area de Farmacología y Area de Química Orgánica (INTEQUI-CONICET), Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Argentina
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Abstract
Previously we reported that dehydroleucodine (DhL), a sesquiterpene lactone, shows gastric and duodenal cytoprotective activity. The mechanism is not mediated by antiacid secretory action; DhL stimulated mucus production and indomethacin pretreatment reduced cytoprotective action. In the present study we demonstrated that the gastric cytoprotective effect is antagonized by the nitric oxide (NO) synthase inhibitor, NG-nitro-L-arginine. The inhibitory action of NG-nitro-L-arginine is reversed by L-arginine, but not D-arginine. The findings suggest that NO is involved in the gastroprotection induced by DhL.
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Affiliation(s)
- A O Maria
- Departamento de Química Orgánica, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis
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Maria AO, Franchi AM, Wendel GH, Gimeno M, Guzman JA, Giordano OS, Guerreiro E. Gastric cytoprotective activity of dehydroleucodine in rats. Role of prostaglandins. Biol Pharm Bull 1998; 21:335-8. [PMID: 9586568 DOI: 10.1248/bpb.21.335] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Previously, we reported that dehydroleucodine (DhL), a sesquiterpene lactone, protected the gastric mucosa of rats from absolute ethanol-induced lesions in a dose-dependent fashion. The mechanism is not mediated by an antiacid secretory action and DhL stimulated mucous production. In the present study, we report the effect of DhL on the mucosal production of prostaglandin E (PGE) and the mucosal release of PGE2 in rats stomach. DhL in acute treatment does not modify these values decreased by previous treatment with indomethacin or absolute ethanol. However, DhL in subchronic treatment significantly enhanced the mucosal production of PGE and the mucosal release of PGE2. Also, indomethacin pretreatment resulted in a significant reduction of the cytoprotective action of DhL. These results indicate the participation of endogenous prostaglandins in DhL protection against ethanol damage. Moreover, we suggest that the gastric protective activity of DhL against ethanol induced gastric mucosal damage is mediated, at least in part, through PGE and PGE2 in subchronic treatment.
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Affiliation(s)
- A O Maria
- Departamento de Farmacología, Universidad Nacional de San Luis, Chacabuco y Pedernera, San Luis, Argentina
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24
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L'Hòpital D, Guerreiro E, Mouilhade C. [A nutrition program for autistic children]. Rev Infirm 1997:58-65. [PMID: 9216395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- D L'Hòpital
- CHS de la Savoie, Deuxième intersecteur de psychiatrie, infanto-juvénile, Chambéry
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25
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Pestchanker MJ, Tonn CE, Rossomando PC, Giordano OS, Guerreiro E. Chemical Differences Between the NewSenecio hualtaranensisand the Closely RelatedS. Fabrisii. Sesquiterpenes and Pyrrolizidine Alkaloids in Three Further Species. ACTA ACUST UNITED AC 1996. [DOI: 10.1080/10575639608043236] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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María AO, Wendel GH, Guardia T, Guzmán JA, Pestchanker MJ, Guerreiro E, Giordano OS. Gastric cytoprotective activity of 2-cyclopenten-1-one and related compounds. Biol Pharm Bull 1995; 18:1784-6. [PMID: 8787809 DOI: 10.1248/bpb.18.1784] [Citation(s) in RCA: 6] [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] [Indexed: 02/02/2023]
Abstract
The cytoprotective activity of the isolated functional groups of several sesquiterpene lactones is reported. Among them the highest activity is shown by alpha-methylen-gamma-butyrolactone and 2-cyclopenten-1-one. The activity shown by those Michael acceptors with a beta carbon hindered by an alkyl substituent was always lower or almost null. A three-way mechanism of action is proposed: a) reduced glutathione synthesis, b) prostaglandin synthesis and c) mucosal glycoprotein synthesis.
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Affiliation(s)
- A O María
- Departmento de Farmacologia, Universidad Nacional de San Luis, Argentina
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27
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Guerreiro E, Garcia EE, Pestchanker MJ, Enriz RD, Rodriguez AM, Maria A, Wendel GH. Cytoprotective Activity of Minor Constituents ofArtemisia Douglasiana. ACTA ACUST UNITED AC 1995. [DOI: 10.1080/10575639508043170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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28
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Guardia T, Guzman JA, Pestchanker MJ, Guerreiro E, Giordano OS. Mucus synthesis and sulfhydryl groups in cytoprotection mediated by dehydroleucodine, a sesquiterpene lactone. J Nat Prod 1994; 57:507-509. [PMID: 8021651 DOI: 10.1021/np50106a010] [Citation(s) in RCA: 23] [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: 05/22/2023]
Abstract
The aerial parts of Artemisia douglasiana have been used in folk medicine as a cytoprotective agent against the development of peptic ulcer. Dehydroleucodine [1], its active principle, significantly prevents the formation of gastric lesions induced by the exposure of the rats to absolute ErOH. It was found in this study that (a) pretreatment of rats with 1 (40 mg/kg, po) caused a significant increase in glycoprotein synthetic activity, approximately sevenfold as large as that of the control; and (b) pretreatment of the rats with the thiol reagent N-methylmaleimide (NEM) significantly diminished the cytoprotection provided by 1. However, the protective effect of 1 was not totally abolished by pretreatment with a combination of indomethacin and NEM, indicating additional mechanisms are involved in the cytoprotective action of 1.
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Affiliation(s)
- T Guardia
- Departamento de Farmacología, Universidad Nacional de San Luis, Argentina
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Giordano OS, Pestchanker MJ, Guerreiro E, Saad JR, Enriz RD, Rodríguez AM, Jáuregui EA, Guzmán J, María AO, Wendel GH. Structure-activity relationship in the gastric cytoprotective effect of several sesquiterpene lactones. J Med Chem 1992; 35:2452-8. [PMID: 1619619 DOI: 10.1021/jm00091a013] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.9] [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: 12/27/2022]
Abstract
The structural requirements for the gastric cytoprotective activity of several sesquiterpene lactones are reported. A theoretical-experimental study on the potentially active centers is carried out. The biological evaluation of reduced analogues and the simulation of the molecular interactions between these compounds and an endogenous cysteine residue suggest that the presence of a non sterically hindered Michael acceptor seems to be an essential structural requirement for the cytoprotective activity in this family of compounds. This observation suggests that cytoprotection is mediated through a Michael reaction between the sulfhydryl-containing peptides of the mucosa and Michael acceptors present in the molecules under study. This mechanism of action is in addition to and distinct from the one proposed in our previous paper, namely, that these sesquiterpenes stimulate endogenous synthesis of prostaglandins.
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Affiliation(s)
- O S Giordano
- Departamento de Química Orgánica, Universidad Nacional de San Luis, Chacabuco y Pedernera, San Luis, Argentina
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30
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Piezzi RS, Guzman JA, Guardia T, Pestchanker MJ, Guerreiro E, Giordano OS. Dehydroleucodine prevents ethanol-induced necrosis in the rat gastric mucosa. A histological study. Microsc Electron Biol Celular 1992; 16:45-55. [PMID: 1293482] [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: 12/26/2022]
Abstract
The aerial part of Artemisia douglasiana Besser (6) has been used in folk medicine as a cytoprotective agent against the development of peptic ulcer. The dehydroleucodine (DhL), its active principle, significantly prevents the formation of gastric lesions induced by the exposure of the rats to absolute ethanol orally administered. The stomachs of control and experimental rats (after ethanol and pretreated with DhL) were removed, opened along the greater curvature and studied under stereo microscope and with light and scanning electron microscope. Absolute ethanol produced focal visible hemorrhagic lesions, extensive hyperemia, vascular stasis, cell disruption, and necrosis of the mucosa. Abundant mass of mucus was observed with scanning. The stomachs of rats pretreated with DhL showed a reduction of lesions. No hemorrhage and hyperemia were observed. The epithelia of the mucosa had a cobblestone appearance, similar to control rats and was covered by a fine layer of mucus. The mechanism of the protective action of DhL is unknown although it seems to be related to endogenous prostaglandins (PG).
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Affiliation(s)
- R S Piezzi
- Cátedra de Histología y Embriología, Fac. Ciencias Médicas, U.N. Cuyo, Mendoza, Argentina
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Giordano OS, Guerreiro E, Pestchanker MJ, Guzman J, Pastor D, Guardia T. The gastric cytoprotective effect of several sesquiterpene lactones. J Nat Prod 1990; 53:803-809. [PMID: 2095374 DOI: 10.1021/np50070a004] [Citation(s) in RCA: 84] [Impact Index Per Article: 2.5] [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 aerial part of Artemisia douglasiana, used in folk medicine as a cytoprotective agent against the development of peptic ulcer, was studied, its active principle dehydroleucodine [1] isolated, and its pharmacological properties analyzed. In order to establish whether or not the reported activity is particular to sesquiterpene lactones, the study of the cytoprotective activity of several related guaianolides and pseudoguaianolides from plants was undertaken. Ludartin [3], 8-angeloyloxy-3-hydroxyguaia-3(15),10(14),11(13)-trien-6,12- olide [4], hymenin [5], mexicanin I [6], helenanin [7], and 9-O-desacetylsparthulin-2-O-angelate [8] were found to exhibit protection. Desacetoxymatricarin [2] did not show cytoprotective activity. The results obtained from the different sesquiterpene lactones studied suggest that the presence of the alpha-methylene-gamma-lactone moiety is, in principle, a requirement for the observed antiulcerogenic activity.
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Affiliation(s)
- O S Giordano
- Departamento de Quimica Orgánica, Universidad Nacional de San Luis, Argentina
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Guzmán J, Piezzi R, Guardia T, Pestchanker M, Guerreiro E, Giordano O. Dehidroleucodine prevents ethanol-induced necrosis in the rat gastric mucosa. A pharmacological and histological. Eur J Pharmacol 1990. [DOI: 10.1016/0014-2999(90)93170-u] [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: 10/27/2022]
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