RESUMO
BACKGROUND: This study was conducted to assess whether statin intake is associated with clinical parameters of periodontitis and matrix metalloproteinase (MMP) levels in gingival crevicular fluid (GCF) of non-diabetic and diabetic patients. METHODS: We first determined the effect of simvastatin on MMP expression in mononuclear cells. We then recruited 117 non-diabetic and diabetic patients, who all had periodontitis and took or did not take statin, and measured periodontal probing depth (PPD) and clinical attachment level (CAL), and collected gingival crevicular fluid (GCF) to quantify MMPs. RESULTS: The in vitro studies showed that simvastatin potently inhibited the expression of MMP-1, MMP-8, and MMP-9 upregulated by lipopolysaccharide (LPS) and high glucose in mononuclear cells. The patient study showed that, after adjusting for age and smoking status, PPD in diabetic patients on statin was significantly less than that in diabetic patients not on statin. MMP-1 level in GCF of non-diabetic and diabetic patients on statin was lower than that of non-diabetic and diabetic patients not on statin, respectively. No difference was found for MMP-8 and -9 levels in GCF. CONCLUSION: Statin intake is associated with reduced PPD in diabetic patients and MMP-1 level in GCF in either non-diabetic or diabetic patients.
Assuntos
Líquido do Sulco Gengival/metabolismo , Inibidores de Hidroximetilglutaril-CoA Redutases/farmacocinética , Metaloproteinase 1 da Matriz/metabolismo , Periodontite/metabolismo , Adulto , Idoso , Glicemia/metabolismo , Colagenases/genética , Colagenases/metabolismo , Complicações do Diabetes/tratamento farmacológico , Complicações do Diabetes/metabolismo , Diabetes Mellitus/tratamento farmacológico , Feminino , Líquido do Sulco Gengival/efeitos dos fármacos , Humanos , Lipopolissacarídeos/farmacologia , Masculino , Metaloproteinase 1 da Matriz/genética , Metaloproteinase 8 da Matriz/genética , Metaloproteinase 8 da Matriz/metabolismo , Metaloproteinase 9 da Matriz/genética , Metaloproteinase 9 da Matriz/metabolismo , Pessoa de Meia-Idade , Perda da Inserção Periodontal , Periodontite/genética , Sinvastatina/farmacologia , Regulação para CimaRESUMO
BACKGROUND AND OBJECTIVE: Both gingival tissue destruction and regeneration are associated with chronic periodontitis, although the former overwhelms the latter. Studies have shown that transforming growth factor beta 1 (TGF-ß1), a growth factor largely involved in tissue regeneration and remodeling, is upregulated in chronic periodontitis. However, the gingival expression of connective tissue growth factor (CTGF or CCN2), a TGF-ß1-upregulated gene, in patients with periodontitis remains undetermined. Although both CTGF/CCN2 and TGF-b1 increase the production of extracellular matrix, they have many different biological functions. Therefore, it is important to delineate the impact of periodontitis on gingival CTGF/CCN2 expression. MATERIAL AND METHODS: Periodontal tissue specimens were collected from seven individuals without periodontitis (group 1) and from 14 with periodontitis (group 2). The expression of CTGF and TGFß1 mRNAs were quantified using real-time PCR. RESULTS: Analysis using the nonparametric Mann-Whitney U-test showed that the levels of expression of both CTGF/CCN2 and TGFß1 mRNAs were significantly increased in individuals with periodontitis compared with individuals without periodontitis. Furthermore, analysis using a nonparametric correlation (Spearman r) test showed a positive correlation between TGFß1 and CTGF/CCN2 mRNAs. CONCLUSION: The gingival expression levels of CTGF/CCN2 and TGFß1 mRNAs in individuals with periodontitis are upregulated and correlated.
Assuntos
Periodontite Crônica/metabolismo , Fator de Crescimento do Tecido Conjuntivo/análise , Periodonto/química , Fator de Crescimento Transformador beta1/análise , Adulto , Idoso , Periodontite Crônica/cirurgia , Aumento da Coroa Clínica/métodos , Feminino , Gengiva/química , Gengivoplastia/métodos , Humanos , Masculino , Pessoa de Meia-Idade , Perda da Inserção Periodontal/metabolismo , Perda da Inserção Periodontal/cirurgia , Bolsa Periodontal/metabolismo , Bolsa Periodontal/cirurgia , Reação em Cadeia da Polimerase em Tempo Real , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Extração Dentária/métodos , Regulação para CimaRESUMO
Bacterial contamination causes irreparable losses in the performance of alcoholic fermentation. Antibiotics are used to control these microorganisms, but they generate residues and cause microbial resistance. Today the only commercial product used by the mills is hops, but it is very expensive. As an alternative, the objective of this work was to evaluate the feasibility of using extracts from plants grown in the Cerrado for antimicrobial control during an alcoholic fermentation to replace antibiotics. Hydraethanolic extracts of leaves and essential oil of the following species were tested: Schinus terebinthifolius Raddi, Serjania erecta, Serjania marginata, Campomanesia adamantium and Syzygium cumini. Only the extract of Serjania marginata did not show any activity against the bacterium Bacillus sp. Both the essential oils as well as the hydroalcoholic extracts of S. terebinthifolius and C. adamantium and the extract of S. erecta showed antibacterial activity without harming the yeast, with potential to replace the hops.
Assuntos
Fermentação , Extratos Vegetais , Extratos Vegetais/farmacologia , Antibacterianos/farmacologia , Bacillus , Óleos Voláteis/farmacologia , Testes de Sensibilidade Microbiana , Bactérias/efeitos dos fármacosRESUMO
INTRODUCTION: The American Dental Association recommends that dentists use a prescription drug monitoring program (PDMP) prior to prescribing an opioid for acute pain management. OBJECTIVE: The objective of this study was to examine dentists' experiences using their state PDMP, as well as the impact that state-mandated registration policies, mandated use policies, and practice characteristics had on the frequency with which dentists used their PDMP. METHODS: We conducted a web-based cross-sectional survey among practicing dentist members of the National Dental Practice-Based Research Network ( n = 805). The survey assessed prescribing practices for pain management and implementation of risk mitigation strategies, including PDMP use. Survey data were linked with network Enrollment Questionnaire data to include practitioner demographics and practice characteristics. RESULTS: Nearly half of respondents ( n = 375, 46.6%) reported having never accessed a PDMP, with the most common reasons for nonaccess being lack of awareness ( n = 214, 57.1%) and lack of knowledge regarding registration and use ( n = 94, 25.1%). The majority of PDMP users reported the program to be very helpful (58.1%) or somewhat helpful (31.6%). Dentists reported that PDMP use most often did not change their intended prescribing behavior (40.2%), led them not to prescribe an opioid (33.5%), or led them to prescribe fewer opioid doses (25.5%). Presence of a mandated use policy was significantly associated with increased frequency of PDMP use across a variety of situations, including prior to 1) prescribing any opioid for pain management, 2) issuing refills, 3) prescribing to new patients, and 4) prescribing to patients deemed high risk. CONCLUSION: Findings suggest that the majority of dentists find PDMPs helpful in informing their opioid-prescribing practices. Whereas the existence of a state-mandated use policy is a consistent predictor of dentists' PDMP use, outreach and education efforts may overcome key barriers to use identified in this study. KNOWLEDGE TRANSFER STATEMENT: Findings from this national survey suggest that the majority of practicing dentists find PDMPs helpful in informing their opioid-prescribing practices; however, consistent PDMP use was not common. Whereas the existence of a state-mandated use policy is a consistent predictor of dentists' PDMP use, outreach and education efforts may overcome key barriers to use identified in this study.
Assuntos
Programas de Monitoramento de Prescrição de Medicamentos , Analgésicos Opioides , Estudos Transversais , Odontólogos , Humanos , Padrões de Prática Médica , Estados UnidosRESUMO
BACKGROUND AND OBJECTIVE: Epidemiological studies have established that patients with diabetes have increased prevalence and severity of periodontal disease. However, the periodontal expression of inflammatory cytokines and matrix metalloproteinases (MMPs) in diabetic patients has not been well characterized. The objective of this study was to determine the difference in the periodontal expression of MMP-1, MMP-8, interleukin-6, tumor necrosis factor-alpha and interleukin-1beta between diabetic and nondiabetic patients. MATERIAL AND METHODS: Periodontal tissue specimens were collected from nine nondiabetic patients without periodontal disease (group 1), from 11 nondiabetic patients with periodontal disease (group 2) and from seven diabetic patients with periodontal disease (group 3). The expression of MMP-1, MMP-8, interleukin-6, tumor necrosis factor-alpha and interleukin-1beta was quantified using real-time polymerase chain reaction. RESULTS: The nonparametric Kruskal-Wallis test showed that the difference in interleukin-6 expression among the groups was statistically significant (p = 0.04). Furthermore, the generalized Kruskal-Wallis nonparametric linear-by-linear association test showed a statistically significant trend of increase in the expression of interleukin-6 from group 1 to group 2 to group 3 (p = 0.02) and a suggestion of such a trend for MMP-1 (p = 0.05). No increase in MMP-8 expression was observed in patients in group 3 compared to patients in groups 1 and 2. Although the average expression levels of MMP-1, interleukin-1beta and tumor necrosis factor-alpha were increased from group 1 to group 3, the differences were not statistically significant. CONCLUSION: A trend of increased interleukin-6 expression in periodontal tissues was observed across patients with neither diabetes nor periodontal disease, patients with periodontal disease alone, and patients with both diseases.
Assuntos
Complicações do Diabetes/imunologia , Interleucina-6/biossíntese , Doenças Periodontais/imunologia , Doenças Periodontais/metabolismo , Adulto , Idoso , Idoso de 80 Anos ou mais , Estudos de Casos e Controles , Complicações do Diabetes/metabolismo , Feminino , Líquido do Sulco Gengival/química , Humanos , Interleucina-1beta/análise , Interleucina-1beta/biossíntese , Interleucina-6/análise , Masculino , Metaloproteinase 1 da Matriz/análise , Metaloproteinase 1 da Matriz/biossíntese , Metaloproteinase 8 da Matriz/análise , Metaloproteinase 8 da Matriz/biossíntese , Pessoa de Meia-Idade , Doenças Periodontais/complicações , Reação em Cadeia da Polimerase , RNA/análise , Estatísticas não Paramétricas , Fator de Necrose Tumoral alfa/análise , Fator de Necrose Tumoral alfa/biossíntese , Adulto JovemRESUMO
ACLMT is a myotoxic Lys49 phospholipase A2 isolated from the venom of the snake Agkistrodon contortrix laticinctus. We have previously demonstrated that ACLMT affects the water transport in toad bladders through a mechanism partially mediated by an increase in the cytosolic calcium. This study aims to further investigate the sites and mechanisms involved in the effects of ACLMT on water transport in toad bladders by examining the role of microtubules and calmodulin. Water flow across the membrane was gravimetrically measured in bladder sac preparations. ACLMT increased basal water transport and inhibited water transport stimulated by vasopressin. Colchicine and trifluoperazine reduced the effect of the toxin on basal water transport and enhanced it on vasopressin-stimulated water transport. The results suggest that both microtubules and calmodulin may be involved in the effect of ACLMT on basal water transport. On the other hand, the effect of the toxin on vasopressin-stimulated water transport appears to be neither dependent on the microtubules integrity nor directly mediated by calmodulin. This study provides a deeper understanding of the effects of the Lys49 PLA2 myotoxins on membrane permeability, thus contributing to elucidate the toxicity mechanism of these myotoxins on biological tissues.
Assuntos
Agkistrodon , Calmodulina/metabolismo , Microtúbulos/metabolismo , Fosfolipases A/toxicidade , Bexiga Urinária/metabolismo , Venenos de Víboras/enzimologia , Venenos de Víboras/toxicidade , Água/metabolismo , Animais , Arginina Vasopressina/farmacologia , Transporte Biológico Ativo/efeitos dos fármacos , Bufo marinus , Permeabilidade da Membrana Celular/efeitos dos fármacos , Colchicina/farmacologia , AMP Cíclico/metabolismo , Células Epiteliais/efeitos dos fármacos , Epitélio/efeitos dos fármacos , Epitélio/metabolismo , Microtúbulos/efeitos dos fármacos , Fosfolipases A2 , Trifluoperazina/farmacologia , Bexiga Urinária/citologia , Bexiga Urinária/efeitos dos fármacos , Vasoconstritores/farmacologiaRESUMO
ACLMT is a myotoxic Lys49 phospholipase A(2) isolated from the venom of the snake Agkistrodon contortrix laticinctus. We have previously shown that ACLMT increases baseline water transport and partially inhibits vasopressin-stimulated water transport across toad bladders due to an increase in cytosolic calcium. However, these evidences provide insufficient insight into the mechanisms involved in the effects of ACLMT on membrane permeability. In an attempt to better understand such mechanisms, the current study aimed to investigate whether the Na(+)/K(+)-ATPase activity of isolated toad bladders can be affected by the ACLMT and the synthetic peptide from its C-terminal region. The toxin significantly decreased the Na(+)/K(+)-ATPase, while the peptide did not alter it. These findings suggest that the effects of ACLMT on membrane permeability may be due to the inhibition of the Na(+)/K(+)-ATPase activity, and that the C-terminal region may not play a relevant role in this effect. This study contributes toward a better understanding of the mechanisms involved in the toxicity of the snake venom Lys49 PLA(2) myotoxins on biological tissues.
Assuntos
Agkistrodon/fisiologia , Venenos de Crotalídeos/enzimologia , Venenos de Crotalídeos/toxicidade , Fosfolipases A/toxicidade , ATPase Trocadora de Sódio-Potássio/metabolismo , Bexiga Urinária/enzimologia , Animais , Bufo marinus , Permeabilidade da Membrana Celular/efeitos dos fármacos , Bexiga Urinária/efeitos dos fármacosRESUMO
ACL myotoxin (ACLMT) is a Lys49 phospholipase A(2)-like protein isolated from the venom of the snake Agkistrodon contortrix laticinctus. The aim of this work was to study the effect of ACLMT on water transport in the toad bladder. Water flow through the membrane was measured gravimetrically in bag preparations of the bladder. ACLMT (20 nM) increased the baseline water flow and partially inhibited arginine-vasopressin (AVP), 8-chlorophenylthio-cAMP (8-CPT-cAMP) and forskolin-stimulated water flow. The effect of ACLMT on baseline or AVP-stimulated water flow was prevented by lanthanum (0.1 mM) indicating that the effect of ACLMT on water transport may be mediated through an increase in intracellular calcium. The effect of ACLMT on baseline water flow was also prevented by nifedipine (0.1 mM) indicating the participation of exogenous calcium in this effect. Carbachol (0.1 mM) has been shown to enhance baseline water flow while inhibiting AVP-stimulated water flow. The effects of ACLMT and carbachol on baseline water flow and AVP-stimulated water flow were not additive, suggesting that both agents alter water transport by a similar mechanism. Indomethacin (10 microM) reduced the effect of ACLMT on forskolin-stimulated water flow, suggesting an increase in prostaglandin biosynthesis. These results suggest that the effects of ACLMT on water transport may be mediated by increasing intracellular calcium and stimulation prostaglandin biosynthesis.
Assuntos
Agkistrodon , Cálcio/metabolismo , Venenos de Crotalídeos/farmacologia , Neurotoxinas/toxicidade , Fosfolipases A/farmacologia , Fosfolipases A/toxicidade , Bexiga Urinária/metabolismo , Água/metabolismo , Animais , Arginina Vasopressina/metabolismo , Transporte Biológico/efeitos dos fármacos , Bufo marinus , Venenos de Crotalídeos/enzimologia , Relação Dose-Resposta a Droga , Epitélio/efeitos dos fármacos , Epitélio/metabolismo , Fosfolipases A2 do Grupo II , Osmose/efeitos dos fármacos , Proteínas de Répteis , Bexiga Urinária/efeitos dos fármacosRESUMO
The aim of this work was to study the effect of recombinant ACL myotoxin, a Lys49PLA2 from Agkistrodon contortrix laticinctus snake venom and Lys49PLA2-derived synthetic peptides corresponding to the region 115-129 of venom of the two different Agkistrodon species on water permeability in the toad urinary bladder. The water flow through the membrane was measured gravimetrically in bag preparations of the bladder. The addition of recombinant ACL myotoxin-MBP (maltose binding protein) fusion protein (10 nM) to the bathing solution significantly increased (above 60%) the water transport compared with the control hemibladders. The addition of the Lys49PLA2-derived synthetic peptides in several concentrations to the bathing solution did not affect the water transport across membrane. These results suggest that the ACL myotoxin effect on water transport is not related to the cytotoxic C-terminal region.
Assuntos
Venenos de Crotalídeos/toxicidade , Neurotoxinas/toxicidade , Fosfolipases A/toxicidade , Bexiga Urinária/efeitos dos fármacos , Água/metabolismo , Agkistrodon , Animais , Transporte Biológico/efeitos dos fármacos , Bufo marinus , Venenos de Crotalídeos/enzimologia , Relação Dose-Resposta a Droga , Fosfolipases A2 do Grupo II , Técnicas In Vitro , Fragmentos de Peptídeos/toxicidade , Permeabilidade/efeitos dos fármacos , Proteínas Recombinantes de Fusão/metabolismo , Proteínas Recombinantes de Fusão/farmacologia , Proteínas de Répteis , Especificidade da Espécie , Relação Estrutura-AtividadeRESUMO
An Asp49 PLA2 (ACL-I PLA2) was purified from the venom of Agkistrodon contortrix laticinctus by gel filtration and cation-exchange chromatography. It has a relative molecular mass of 14,000, and its N-terminal sequence has more than 65% of identity with other snake venom PLA2s. ACL-I PLA2 injected into the Tibialis anterior muscle of rats and mice at doses of 0.3 and 1.6 mg/kg, respectively, induced muscle fiber necrosis, cellular infiltration and edema 3 and 48 h after injection. The effect of the purified enzyme on water permeability was tested in the isolated toad urinary bladder. Water flow through the membrane was measured gravimetrically in bag preparations of the bladder. ACL-I PLA2 (20 nM) did not significantly alter the water permeability in the bladder preparations, whereas ACL myotoxin (ACLMT), a Lys49 PLA2 isolated from the same venom, at similar concentration significantly increased (81%) the water permeability. However, both toxins inhibited the AVP-stimulated water permeability. These results strongly suggest that PLA2 activity is not involved in the ACLMT effect on water transport and the effect of ACL-I PLA2 myotoxin on membrane permeability is mediated by mechanisms that are different in comparison to ACLMT.
Assuntos
Agkistrodon , Venenos de Crotalídeos/química , Músculo Esquelético/efeitos dos fármacos , Fosfolipases A/toxicidade , Bexiga Urinária/efeitos dos fármacos , Água/metabolismo , Animais , Transporte Biológico/efeitos dos fármacos , Bufo marinus , Cromatografia em Gel , Cromatografia por Troca Iônica , Relação Dose-Resposta a Droga , Edema/induzido quimicamente , Eritrócitos/efeitos dos fármacos , Camundongos , Músculo Esquelético/patologia , Necrose , Permeabilidade/efeitos dos fármacos , Fosfolipases A/isolamento & purificação , Fosfolipases A2 , RatosRESUMO
We report a case of cutaneous infection caused by Phialemonium curvatum GAMS et COOKE, 1983, after bone marrow transplantation. The genus Phialemonium was created by GAMS & MCGINNIS in 1983 including three new species: Ph. obovatum, Ph. curvatum and Ph. dimorphosporum, and represents an intermediate genus between Acremonium and Phialophora. Nowadays, the genus Phialemonium is considered to be a pheoid fungus which may cause the eventual lesions observed in pheo- and hyalohyphomycosis. Species of this genus have been described as opportunistic agents in humans and animals, mainly as a result of immunosuppression. In the present case, the patient had multiple myeloma and received an allogenic bone marrow transplant from his HLA-compatible brother. Two months after transplantation, he developed purplish and painful nodular lesions on the right ankle. Some of these lesions drained spontaneously and apparently hyaline mycelial filaments were observed, whose culture was initially identified as Acremonium sp. Subsequent studies showed that the fungus was Phialemonium curvatum. The infection was treated with amphotericin B, followed by ketoconazole. The patient was submitted to surgical debridement followed by two skin grafts to repair the bloody area. The duration of the treatment was 4 months and secondary prophylaxis with ketoconazole alone was maintained for one additional month. No recurrence was observed after discontinuation of treatment. The authors comment on the pathogenicity of the genus Phialemonium.
Assuntos
Transplante de Medula Óssea/efeitos adversos , Dermatomicoses/microbiologia , Fungos Mitospóricos/isolamento & purificação , Infecções Oportunistas/complicações , Adulto , Dermatomicoses/tratamento farmacológico , Humanos , Hospedeiro Imunocomprometido , MasculinoRESUMO
The authors report two cases of onychomycosis in the dystrophic form, one of them involving an HIV-positive patient, provoked by Scytalidium dimidiatum, previously called Scytalidium lignicola. The subject is reviewed from the taxonomic viewpoint, considering the anamorph Hendersonula toruloidea as a synonym of Nattrassia mangiferae, and having Scytalidium dimidiatum as the major synanamorph. According to many mycologists, Scytalidium hyalinum may be a separate species or a hyaline mutant of Scytalidium dimidiatum. Scytalidium lignicola Pesante 1957 was considered to be the type-species of the genus by ELLIS (1971)13 and later to be a "conidial state" of Hendersonula toruloidea by the same author, today known as Nattrassia mangiferae. The microorganism lives only on the roots of certain plants (mainly Platanus and Pinus). It produces pycnidia and is not considered to be a pathogen, although it is considered as a possible emerging agent capable of provoking opportunistic fungal lesions. The importance of this topic as one of the most outstanding in fungal taxonomy, so likely to be modified over time, as well as its interest in the field of dermatologic mycology, are emphasized.
Assuntos
Fungos Mitospóricos/classificação , Onicomicose/microbiologia , Adulto , Antifúngicos/uso terapêutico , Feminino , Dermatoses do Pé/tratamento farmacológico , Dermatoses do Pé/microbiologia , Dermatoses da Mão/tratamento farmacológico , Dermatoses da Mão/microbiologia , Humanos , Itraconazol/uso terapêutico , Cetoconazol/uso terapêutico , Masculino , Fungos Mitospóricos/isolamento & purificação , Onicomicose/tratamento farmacológicoRESUMO
The authors report the first case of dermatophytosis caused by Trichophyton raubitschekii in a patient from the State of São Paulo with Tinea corporis lesions localized on the buttocks. Culture on Sabouraud-agar with cycloheximide permitted the isolation and identification of the fungus, and the diagnosis was confirmed by Dr. Lynne Sigler, University of Alberta, Canada. Systemic treatment with fluconazole, 150 mg/week for 4 weeks, in combination with topical treatment with isoconazole initially yielded favorable results, with recurrence of the lesions after the medication was discontinued. This is the fifth case of this dermatophytosis published in the Brazilian medical literature.
Assuntos
Tinha/microbiologia , Trichophyton/isolamento & purificação , Antifúngicos/uso terapêutico , Brasil/epidemiologia , Feminino , Fluconazol/uso terapêutico , Humanos , Miconazol/análogos & derivados , Miconazol/uso terapêutico , Tinha/tratamento farmacológico , Tinha/epidemiologia , Trichophyton/classificação , Trichophyton/citologiaRESUMO
OBJECTIVE: Evaluate early and late evolution of patients submitted to primary coronary angioplasty for acute myocardial infarction. METHODS: A prospective study of 135 patients with acute myocardial infarction submitted to primary transcutaneous coronary angioplasty (PTCA). Success was defined as TIMI 3 flow and residual lesion <50%. We performed statistical analyses by univariated, multivariated methods and survival analyze by Kaplan-Meier. RESULTS: PTCA success rate was 78% and early mortality 18,5%. Killip classes III and IV was associated to higher mortality, odds ratio 22.9 (95% CI: 5,7 to 91,8) and inversely related to age <75 years (OR = 0,93; 95% CI: 0.88 to 0.98). If we had chosen success flow as TIMI 2 and had excluded patients in Killip III/IV classes, success rate would be 86% and mortality 8%. The survival probability at the end or study, follow-up time 142 +/- 114 days, was 80% and event free survival 35%. Greater survival was associated to stenting (OR = 0.09; 0.01 to 0.75) and univessel disease (OR = 0.21; 0.07 to 0.61). CONCLUSION: The success rate was lower and mortality was higher than randomized trials, however similar to that of non randomized studies. This demonstrated the efficacy of primary PTCA in our local conditions.
Assuntos
Angioplastia Coronária com Balão , Infarto do Miocárdio/terapia , Idoso , Estudos de Coortes , Intervalos de Confiança , Feminino , Seguimentos , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Resultado do TratamentoRESUMO
The aim of this work was to study the effect of some pharmacological cholinergic agents on the events that follow the interaction of arginine vasopressin with toad bladder membrane receptors related to synthesis of 3'5'(c)AMP. The water flow through the membrane was measured gravimetrically in sac preparations of the membrane. In the absence of arginine vasopressin (AVP), carbachol induced a significant increase in the water flow (37%) related to the basal (Ringer's solution). On the other hand, when carbachol and AVP were associated, a significant decrease of AVP hydrosmotic activity occurred (23%). The inhibitory effect of carbachol on the AVP action was almost completely abolished by the cholinergic antagonists atropine, pirenzepine, 4-diphenylacetoxy-N-methylpiperidine methiodide (4-DAMP) and the calcium antagonist lanthanum. Similarly, when carbachol and 3'5' cyclic adenosine monophosphate (3'5'(c)AMP) were associated, a decrease of nucleotide hydrosmotic activity was observed (12.80%). This effect was partially restored by the addition of pirenzepine or 4-DAMP in the bath solution. These results suggest a role for muscarinic receptors of sub-type M(1) and M(3), which are involved in the intracellular calcium release. The increase of calcium concentration in the intracellular medium acts as a negative modulator in the hydrosmotic action of antidiuretic hormone.
Assuntos
Arginina Vasopressina/farmacologia , Agonistas Colinérgicos/farmacologia , Antagonistas Colinérgicos/farmacologia , Bexiga Urinária/efeitos dos fármacos , Água/metabolismo , 3',5'-AMP Cíclico Fosfodiesterases/metabolismo , Animais , Atropina/farmacologia , Transporte Biológico , Bufo marinus/metabolismo , Cálcio/metabolismo , Bloqueadores dos Canais de Cálcio/farmacologia , Carbacol/farmacologia , Técnicas In Vitro , Soluções Isotônicas/farmacologia , Lantânio/farmacologia , Concentração Osmolar , Piperidinas/farmacologia , Pirenzepina/farmacologia , Bexiga Urinária/metabolismo , Vasoconstritores/farmacologiaRESUMO
Para avaliar os efeitos de dois diferentes planos nutricionais de aminoácidos sulfurados totais (AAST) e de duas fontes de metionina nas rações de frangos de corte, foi realizado um experimento com 840 frangos machos, da linhagem agRoss 308. Os tratamentos foram definidos pelos planos nutricionais de AAST (normal e reduzido) e pelas fontes de metionina (DL-metionina e metionina hidroxianáloga - MHA) usadas nas rações. O delineamento experimental foi o inteiramente ao acaso, em arranjo fatorial 2x2, (duas fontes de metionina x dois planos nutricionais de AAST). Não foram encontradas diferenças entre os tratamentos para o consumo de ração, ganho de peso, viabilidade, rendimento de carcaça, porcentagem de peito e composição das carcaças e vísceras. As aves que receberam as rações com o plano normal de AAST apresentaram melhor conversão alimentar, e as que receberam ração contendo DL-metionina tiveram menor porcentagem de gordura abdominal. Concluiu-se que a substituição da DL-metionina pela MHA não afetou o desempenho, que o plano nutricional normal melhorou a conversão alimentar dos frangos de corte e que as fontes de metionina e os planos nutricionais de AAST não influenciaram o rendimento e a composição da carcaça e vísceras de frangos de corte.
To evaluate the effects of two different nutritional plans for total sulfur amino acids (TSAA), and two methionine sources in the diets of broiler chickens, an experiment was conducted with 840 male broiler line agRoss 308. The treatments were defined by nutritional plans of TSAA (normal and low) and the methionine sources (DL-methionine and methionine hydroxy-analogue - MHA) used in the diets. The experimental design was completely randomized in a factorial scheme 2X2, (two methionine sources x two levels of nutrition plans TSAA). No differences were found between treatments for ration consumption, weight gain, viability, carcass yield, and carcass composition. The broilers that received the diets with the TSAA normal level had better feed conversion, and those that received diets containing DL-methionine had lower abdominal fat percentages. It was concluded that the substitution of DL-methionine by MHA did not affect the performance of broilers, whereas the normal nutrition plan improved feed conversion of broiler chickens as well as methionine sources and TSAA nutritional plans did not influence the carcass yield and carcass composition of broiler chickens.
Assuntos
Animais , Metionina/efeitos adversos , Ração Animal/análise , Inquéritos Nutricionais , Aumento de PesoRESUMO
A case of phaeohyphomycosis is reported in a male renal transplant recipient with a nodular lesion in the right leg who was treated with immunosuppressing drugs. The lesion consisted of a purulent cyst with thick walls. The cyst was excised surgically, and the patient did not receive any antifungal therapy. One year later he remains well. Histological study of the lesion showed a granulomatous reaction of epithelioid and multinucleate giant cells, with a central area of necrosis and pus. Fontana-Masson staining demonstrated the presence of pigmented hyphal elements. The fungus Colletotrichum crassipes was grown in different cultures from the cyst. The in vitro inhibitory activities of eight antifungal drugs against the isolate were tested. Clotrimazole and UR-9825 were the most active drugs. This case represents the first known reported infection caused by this rare species.
Assuntos
Colletotrichum/isolamento & purificação , Cistos/diagnóstico , Dermatomicoses/diagnóstico , Adulto , Colletotrichum/classificação , Colletotrichum/crescimento & desenvolvimento , Meios de Cultura , Cistos/microbiologia , Cistos/cirurgia , Dermatomicoses/microbiologia , Dermatomicoses/cirurgia , Humanos , Transplante de Rim , MasculinoRESUMO
Avaliou-se o efeito da forma física da ração sobre o desempenho e o rendimento de cortes de duas linhagens de frangos de corte, Cobb e Ross. Foram utilizados 900 frangos machos, criados em galpão experimental, com idades entre um a 45 dias. Os tratamentos foram definidos pela linhagem e forma física da ração da seguinte forma: (T1) ração farelada à vontade, (T2) ração peletizada à vontade e (T3) ração peletizada controlada. Para avaliação do desempenho, o delineamento experimental foi o inteiramente ao acaso, em arranjo fatorial 3 x 2 (três dietas e duas linhagens) e cinco repetições, sendo cada repetição composta de 30 aves. Para a avaliação do rendimento de cortes da carcaça, o delineamento foi o mesmo, com exceção do número de repetições, que foi de 30, sendo cada ave considerada como uma repetição. A ração peletizada controlada reduziu o ganho de peso em relação à peletizada à vontade em 4,7 por cento e melhorou a viabilidade da linhagem Cobb em 10 por cento. Independentemente da linhagem, maiores ganhos de peso foram obtidos quando as aves foram alimentadas com ração peletizada à vontade. A restrição alimentar favoreceu a conversão alimentar das aves em 2 por cento. A linhagem não influenciou os parâmetros de rendimento de cortes e porcentagens de órgãos digestivos avaliados. A peletização favorece o desempenho de frangos de corte.
The effect of physical form of the rations on the performance and yield of cuts of the carcass of two lineages of broilers (Cobb and Ross) was evaluated. The treatments were defined according to the lineages and physical form of the rations and were given mash ad libitum, pelleted ad libitum, and restricted pelleted (with equal intake of the given mash ration). In the trial, 900-day-old broilers were raised in experimental poultry house from 1 to 45 days of age. To evaluate the performance, the statistical design was the complete randomized with 3 x 2 (three diets and two lines) factorial arrangement with five repetitions, being 30 birds in each repetition. To evaluate the carcass and yield of cuts, the statistical design was the same, with 30 birds for each treatment, being each bird considered one repetition. The restricted pelleted ration reduced the weight of gain in 4.7 percent and enhanced the viability of the lineage Cobb in 10 percent. Independently of the lineage, better weight of gain were observed in birds fed pelleted rations ad libitum. The restriction of the pelleted ration enhanced the feed conversion in 2 percent. The lineage did not influence the yield of cuts and percentage of digestive organs evaluated. The pelletization enhances the performance of broilers.