RESUMO
BACKGROUND/AIM: An epidemiological investigation indicated that tricyclic antidepressants (TCAs) and selective serotonin reuptake inhibitors (SSRIs) were associated with a lower risk of hepatocellular carcinoma (HCC). Another previous study showed that seven antidepressants inhibited glucocorticoid receptor (GR)-mediated gene transcription, a pathway that is linked to various diseases, including cancer. It is known that the expression levels of GR in cancerous tissues are higher than those in noncancerous tissues in patients with HCC. Notably, among the seven antidepressants, amitriptyline (TCA), desipramine (TCA), and fluoxetine (SSRI) were found to induce apoptosis in HCC cells. Given this, we investigated whether four other GR-specific antidepressants, including mianserin (atypical antidepressant), tianeptine (atypical antidepressant), imipramine (TCA), and moclobemide (monoamine oxidase inhibitor, MAOI) affect the cell viability of HCC. MATERIALS AND METHODS: Cell proliferation and IC50 curves were determined by MTT assays. RESULTS: Imipramine and mianserin significantly inhibited HCC cell viability, whereas moclobemide and tianeptine did not. IC50 showed that the same dose of imipramine or mianserin led to significant inhibitory effects on HCC cells whereas there were only slight effects on normal human hepatocytes (HH). CONCLUSION: According to previous and present findings, TCAs, SSRIs and mianserin may have anti-tumor activity in HCC. However, the appropriate dose, frequency, and route of the administration still need to be determined in future preclinical and clinical studies.
Assuntos
Antidepressivos de Segunda Geração , Carcinoma Hepatocelular , Neoplasias Hepáticas , Humanos , Carcinoma Hepatocelular/tratamento farmacológico , Mianserina , Imipramina/farmacologia , Moclobemida , Inibidores Seletivos de Recaptação de Serotonina , Neoplasias Hepáticas/tratamento farmacológico , Antidepressivos/farmacologiaRESUMO
Background: Coronavirus pandemic, a serious global public health threat, affects the Southern African countries more than any other country on the continent. The region has become the epicenter of the coronavirus with South Africa accounting for the most cases. To cap the deadly effect caused by the pandemic, we apply a statistical modelling approach to investigate and predict COVID-19 incidence. Methods: Using secondary data on the daily confirmed COVID-19 cases per million for Southern Africa Development Community (SADC) member states from March 5, 2020, to July 15, 2021, we model and forecast the spread of coronavirus in the region. We select the best ARIMA model based on the log-likelihood, AIC, and BIC of the fitted models. Results: The ARIMA (11,1,11) model for the complete data set was finally selected among ARIMA models based upon the parameter test and the BoxLjung test. The ARIMA (11,1,9) was the best candidate for the training set. A 15-day forecast was also made from the model, which shows a perfect fit with the testing set. Conclusion: The number of new COVID-19 cases per million for the SADC shows a downward trend, but the trend is characterized by peaks from time to time. Tightening up of the preventive measures continuously needs to be adapted in order to eradicate the coronavirus epidemic from the population.
Assuntos
Moclobemida , África Austral , Previsões , COVID-19 , Modelos Estatísticos , EpidemiasRESUMO
In the present work, a hit molecule obtained from zinc 'clean drug-like database' by systematically performed computational studies was modified chemically to obtain different derivatives (VS1-VS25). Structures of synthesized derivatives were confirmed by IR, 1H-NMR, 13C-NMR, 13C-DEPT, MS, and elemental analysis. All the synthesized compounds were biologically evaluated for their antidepressant activity by using tail suspension test and forced swimming test in albino mice. All these derivatives showed moderate to good antidepressant activity. The most potent compound (VS25) among the synthesized compounds showed better antidepressant potential than the standard drugs moclobemide, imipramine, and fluoxetine. To understand the time-dependent interactions of this most active compound with MAO-A molecular dynamics was carried out and reported here. Additionally, acute oral toxicity was performed for the most active compound as per OECD guidelines.
Assuntos
Antidepressivos , Fluoxetina , Animais , Camundongos , Antidepressivos/farmacologia , Antidepressivos/química , Moclobemida , Elevação dos Membros Posteriores , Natação , Comportamento AnimalRESUMO
The aim of this article is to synthesize informations about monoamine oxidase inhibitors drugs (MAOI) used in the treatment of depression. General informations on monoamine oxidase (MAO) and its kinetic properties are presented. MAO is an enzyme that degrades catecholamines and their 3-methoxy derivatives and other monoamines, for example serotonin or tryptamine. The criteria and symptoms of depressive disorders are discussed. They have to be distinguished from the state of sadness and similar states. The basic symptoms include: voice, facial expressions, anhedonia and psychomotor slowness. They may differ in individual diagnostic units. The following basic mechanism of the pharmacological action of MAOI has been indicated: when a drug inhibits MAO, the degradation of monoamines decreases and the concentration of the neurotransmitter in the synaptic cleft increases. Informations on selected selective and reversible MAOI-A are presented in the following sections. These are currently the safest and most effective MAOI drugs that can be used in the treatment of depressive diseases. The following drugs are discussed: moclobemide, befloxatone, toloxatone and brofaromine. Final conclusions are given and the presented data summarized.
Assuntos
Depressão , Inibidores da Monoaminoxidase , Depressão/tratamento farmacológico , Humanos , Moclobemida , Monoaminoxidase , Inibidores da Monoaminoxidase/farmacologia , Inibidores da Monoaminoxidase/uso terapêuticoRESUMO
BACKGROUND: Dehydrozingerone (DHZ) is an active ingredient of Zingiber officinale and structural half analogue of curcumin. In the present study, DHZ was evaluated for monoamine oxidase (MAO) inhibitory activity in silico and antidepressant activity in vivo. METHOD: The binding affinity of DHZ with MAO-A (PDB ID: 2Z5Y) was assessed using Schrodinger's Maestro followed by free energy calculation, pharmacokinetic property prediction using Qikprop and Molecular dynamics simulation using Desmond. In vivo antidepressant activity of DHZ was evaluated on C57 BL/6 male mice using Escilatopram as the standard antidepressant. Open field test (OFT), forced swimming test (FST) and tail suspension test (TST) were used to evaluate the antidepressant effect of the drugs on days 1 and 7. Following the behavioural study, neurotransmitters (noradrenaline, dopamine and serotonin) were estimated using liquid chromatography-mass spectrometry. RESULTS: DHZ demonstrated a greater binding affinity for the MAO-A enzyme compared to moclobemide in silico. Immobility in TST and FST were significantly (p < 0.05) reduced in vivo with 100mg/kg DHZ as compared to respective controls. DHZ treatment was more effective 1 h post treatment compared to vehicle control. A significant increase in levels of neurotransmitters was observed in mice brain homogenate in response to DHZ treatment, reassuring its antidepressant-like potential. CONCLUSION: DHZ demonstrated MAO-A inhibition in silico, and the increased neurotransmitter levels in the brain in vivo were associated with an antidepressant-like effect.
Assuntos
Antidepressivos/química , Antidepressivos/farmacologia , Gengibre/química , Estirenos/química , Estirenos/farmacologia , Animais , Escitalopram/uso terapêutico , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Moclobemida , Simulação de Acoplamento Molecular , Monoaminoxidase/genética , Monoaminoxidase/metabolismo , Ligação ProteicaRESUMO
BACKGROUND: Due to enhancing serotonergic and noradrenergic neurotransmission, moclobemide may influence seizure phenomena. In this study, we examined the effect of both acute and chronic treatment with moclobemide on seizures and the action of first-generation antiepileptic drugs: valproate, carbamazepine, phenobarbital and phenytoin. METHODS: The effect of moclobemide on seizures was assessed in the electroconvulsive threshold test, while its influence on antiepileptic drugs was estimated in the maximal electroshock test in mice. Undesired effects were evaluated in the chimney test (motor impairment) and step-through passive-avoidance task (long-term memory deficits). Finally, brain concentrations of antiepileptics were determined by fluorescence polarization immunoassay. RESULTS: Given acutely, moclobemide at 62.5 and 75 mg/kg increased the electroconvulsive threshold. In contrast, chronic treatment with moclobemide up to 75 mg/kg did not influence this parameter. Acute moclobemide applied at subthreshold doses (up to 50 mg/kg) enhanced the antielectroshock effects of carbamazepine, valproate and phenobarbital. Chronic moclobemide (37.5-75 mg/kg) increased the action of all four antiepileptic drugs. All revealed interactions, except these between moclobemide and phenobarbital, seem to have pharmacokinetic nature, because the antidepressant drug, either in acute or in chronic treatment, increased the brain concentrations of respective antiepileptic drugs. In terms of undesired neurotoxic effects, acute and chronic moclobemide, antiepileptic drugs, and their combinations did not produce significant motor or long-term memory impairment. CONCLUSIONS: Acute and chronic therapy with moclobemide can increase the effectiveness of some antiepileptic drugs against the maximal electroshock test. In mice, this effect was, at least partially, due to pharmacokinetic interactions. So far as the results of experimental studies can be transferred to clinical conditions, moclobemide seems safe for the application in patients with epilepsy and depression. Possibly, in the case of certain antiepileptic drugs combined with moclobemide, their doses should be adjusted downwards.
Assuntos
Anticonvulsivantes/administração & dosagem , Carbamazepina/administração & dosagem , Eletrochoque , Moclobemida/administração & dosagem , Inibidores da Monoaminoxidase/administração & dosagem , Fenobarbital/administração & dosagem , Fenitoína/administração & dosagem , Convulsões/tratamento farmacológico , Ácido Valproico/administração & dosagem , Animais , Encéfalo/metabolismo , Carbamazepina/metabolismo , Modelos Animais de Doenças , Relação Dose-Resposta a Droga , Sinergismo Farmacológico , Epilepsia/tratamento farmacológico , Feminino , Masculino , Memória de Longo Prazo/efeitos dos fármacos , Camundongos , Moclobemida/efeitos adversos , Inibidores da Monoaminoxidase/efeitos adversos , Atividade Motora/efeitos dos fármacos , Fenobarbital/metabolismo , Fenitoína/metabolismo , Ácido Valproico/metabolismoRESUMO
Monoamine oxidase (MAO) type B (MAO-B) inhibition was shown to confer anti-parkinsonian benefit as monotherapy and adjunct to L-3,4-dihydroxyphenylalanine (L-DOPA) in clinical trials. Here, we explore the anti-parkinsonian effect of MAO type A (MAO-A) inhibition as monotherapy, as the enzyme MAO-A is also encountered within the primate and human basal ganglia, where it metabolises dopamine, albeit to a lesser extent than MAO-B. In six 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-lesioned marmosets, we assessed the anti-parkinsonian effect of the reversible MAO-A inhibitor moclobemide (0.1 and 1 mg/kg) as monotherapy and compared it to that of L-DOPA and vehicle treatments. Moclobemide significantly reversed parkinsonism (by 39%, P < 0.01), while eliciting only mild dyskinesia and psychosis-like behaviours (PLBs). In contrast, L-DOPA anti-parkinsonian effect was accompanied by marked dyskinesia and PLBs. MAO-A inhibition with moclobemide may provide anti-parkinsonian benefit when administered without L-DOPA and might perhaps be considered as monotherapy for the treatment of Parkinson's disease in the early stages of the condition.
Assuntos
Antiparkinsonianos/farmacologia , Gânglios da Base/efeitos dos fármacos , Moclobemida/farmacologia , Inibidores da Monoaminoxidase/farmacologia , Monoaminoxidase/metabolismo , Transtornos Parkinsonianos/tratamento farmacológico , 1-Metil-4-Fenil-1,2,3,6-Tetra-Hidropiridina , Animais , Gânglios da Base/enzimologia , Gânglios da Base/fisiopatologia , Comportamento Animal/efeitos dos fármacos , Callithrix , Modelos Animais de Doenças , Feminino , Levodopa/farmacologia , Masculino , Atividade Motora/efeitos dos fármacos , Transtornos Parkinsonianos/induzido quimicamente , Transtornos Parkinsonianos/enzimologia , Transtornos Parkinsonianos/fisiopatologiaRESUMO
Whereas monoamine oxidase (MAO) type B inhibitors are used as adjunct to L-3,4-dihydroxyphenylalanine (L-DOPA) in the treatment of Parkinson's disease (PD), the enzyme MAO type A (MAO-A) also participates in the metabolism of dopamine in the human and primate striatum. Here, we sought to assess the effect of the selective reversible MAO-A inhibitor moclobemide on L-DOPA anti-parkinsonian in the gold standard animal model of PD, the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-lesioned primate. We also assessed the effect of moclobemide on L-DOPA-induced dyskinesia and psychosis-like behaviours (PLBs). Experiments were performed in six MPTP-lesioned marmosets chronically treated with L-DOPA and exhibiting stable dyskinesia and PLBs upon each administration. In a randomised within-subject design, animals were administered a therapeutic dose of L-DOPA in combination with moclobemide (0.1, 1 and 10 mg/kg) or its vehicle, after which the severity of parkinsonism, dyskinesia, and PLBs was rated by an experienced blinded rater. Moclobemide significantly reduced the global parkinsonian disability (- 36% with 0.1 mg/kg, P < 0.05; - 38% with 1 mg/kg, P < 0.01; - 47% with 10 mg/kg, P < 0.01), when compared with its vehicle. This reduction of parkinsonism was not accompanied by an exacerbation of dyskinesia or PLBs. Reversible MAO-A inhibition with moclobemide appears as an effective way to increase the anti-parkinsonian action of L-DOPA, without negatively affecting dyskinesia or dopaminergic psychosis.
Assuntos
Antiparkinsonianos/farmacologia , Gânglios da Base/efeitos dos fármacos , Levodopa/farmacologia , Moclobemida/farmacologia , Inibidores da Monoaminoxidase/farmacologia , Monoaminoxidase/metabolismo , Transtornos Parkinsonianos/tratamento farmacológico , 1-Metil-4-Fenil-1,2,3,6-Tetra-Hidropiridina , Animais , Antiparkinsonianos/toxicidade , Gânglios da Base/enzimologia , Gânglios da Base/fisiopatologia , Comportamento Animal/efeitos dos fármacos , Callithrix , Modelos Animais de Doenças , Sinergismo Farmacológico , Quimioterapia Combinada , Discinesia Induzida por Medicamentos/etiologia , Discinesia Induzida por Medicamentos/fisiopatologia , Feminino , Levodopa/toxicidade , Masculino , Atividade Motora/efeitos dos fármacos , Transtornos Parkinsonianos/induzido quimicamente , Transtornos Parkinsonianos/enzimologia , Transtornos Parkinsonianos/fisiopatologia , Psicoses Induzidas por Substâncias/etiologia , Psicoses Induzidas por Substâncias/psicologiaRESUMO
AIMS: More than one-half of betel-quid (BQ) chewers have betel-quid use disorder (BUD). However, no medication has been approved. We performed a randomised clinical trial to test the efficacy of taking escitalopram and moclobemide antidepressants on betel-quid chewing cessation (BQ-CC) treatment. METHODS: We enrolled 111 eligible male BUD patients. They were double-blinded, placebo-controlled and randomised into three treatment groups: escitalopram 10 mg/tab daily, moclobemide 150 mg/tab daily and placebo. Patients were followed-up every 2 weeks and the length of the trial was 8 weeks. The primary outcome was BQ-CC, defined as BUD patients who continuously stopped BQ use for ⩾6 weeks. The secondary outcomes were the frequency and amount of BQ intake, and two psychological rating scales. Several clinical adverse effects were measured during the 8-week treatment. RESULTS: Intention-to-treat analysis shows that after 8 weeks, two (5.4%), 13 (34.2%) and 12 (33.3%) of BUD patients continuously quit BQ chewing for ⩾6 weeks among placebo, escitalopram, moclobemide groups, respectively. The adjusted proportion ratio of BQ-CC was 6.3 (95% CI 1.5-26.1) and 6.8 (95% CI 1.6-28.0) for BUD patients who used escitalopram and moclobemide, respectively, as compared with those who used placebo. BUD patients with escitalopram and moclobemide treatments both exhibited a significantly lower frequency and amount of BQ intake at the 8th week than those with placebo. CONCLUSIONS: Prescribing a fixed dose of moclobemide and escitalopram to BUD patients over 8 weeks demonstrated treatment benefits to BQ-CC. Given a relatively small sample, this study provides preliminary evidence and requires replication in larger trials.
Assuntos
Antidepressivos/uso terapêutico , Areca , Citalopram/uso terapêutico , Mastigação , Moclobemida/uso terapêutico , Transtornos Relacionados ao Uso de Substâncias/tratamento farmacológico , Adolescente , Adulto , Idoso , Areca/efeitos adversos , Método Duplo-Cego , Humanos , Análise de Intenção de Tratamento , Masculino , Pessoa de Meia-Idade , Transtornos Relacionados ao Uso de Substâncias/etnologia , Transtornos Relacionados ao Uso de Substâncias/psicologia , Resultado do TratamentoRESUMO
BACKGROUND: Though there are several classes of antidepressant drugs available on the pharmaceutical market, depression that affects globally over 320 million people is still undertreated. Scientists have made attempts to develop novel therapeutical strategies to maximize effectiveness of therapy and minimize undesired reactions. One of the ideas is use of either dual-action agents or combined administration of two substances that affect diverse neurotransmissions. Thus, we investigated whether the selected CB receptor ligands (oleamide, AM251, JWH133, and AM630) can have an impact on the activity of bupropion and moclobemide. Bupropion belongs to the dual acting drugs, whereas moclobemide is an inhibitor of monoamine oxidase. METHODS: The mice forced swim test and the tail suspension test were applied in order to determine the potential antidepressant-like activity, whereas the HPLC method was used in order to assess the brain concentrations of the tested antidepressants. RESULTS: An intraperitoneal injection of sub-effective doses of oleamide (5 mg/kg), AM251 (0.25 mg/kg), and AM630 (0.25 mg/kg) increased activity of bupropion (10 mg/kg) in both behavioural tests. Effects of moclobemide (1.5 mg/kg) were potentiated only by AM251. These results were not influenced by the hypo- or hyperlocomotion of animals. CONCLUSION: The outcomes of the present study revealed that particularly activation or inhibition of the CB1 receptor function may augment the antidepressant activity of bupropion, whereas only inhibition of the CB1 receptor function manages to increase activity of moclobemide. Most probably, an interplay between CB receptor ligands and bupropion or moclobemide takes place at the cellular level.
Assuntos
Antidepressivos/farmacologia , Bupropiona/farmacologia , Endocanabinoides/metabolismo , Moclobemida/farmacologia , Animais , Antidepressivos/farmacocinética , Comportamento Animal/efeitos dos fármacos , Encéfalo/metabolismo , Bupropiona/farmacocinética , Moduladores de Receptores de Canabinoides/farmacologia , Masculino , Camundongos , Moclobemida/farmacocinética , Distribuição TecidualRESUMO
Post-traumatic stress disorder (PTSD) is a long-lasting mental disorder and accompanied by worse fear extinction. Enhanced fear memory or poor fear extinction are typical features of PTSD. Dysfunction of the serotonergic neurotransmitter system is involved in numerous mental and behavioral disorders. Monoamine oxidase A (MAOA) is important in the metabolism of serotonin and play an important role in behavious. The aim of this study was to explore the change of MAOA and effect of MAOA on fear memory in PTSD. We used single prolonged stress (SPS) to create animal model of PTSD. A startle/fear box and elevated plus maze were used to observe fear memory and anxiety level, respectively. We examined the expression of MAOA and synaptic marker protein, as well as the immunological activity of MAOA in the infralimbic cortex (IL) area, which is a critical brain region involved in emotions, especially fear regulation. We found increased anxiety-like behavior, dysfunction in fear extinction, and increased MAOA in SPS rats. After treatment with moclobemide (a selective inhibitor of MAOA), SPS rats showed significantly improved fear memory and decreased anxiety-like behavior, which indicated that moclobemide could reverse fear extinction deficit and attenuate abnormally increased levels of anxiety caused by SPS in short term. On the contrary, decreased PSD-95 and SYN1 expression in the IL region were also reversed by moclobemide. These results suggest that increased MAOA play a negative role in fear extinction and levels of anxiety in PTSD, which may be involved in change in PSD-95 and SYN1.
Assuntos
Ansiolíticos/farmacologia , Extinção Psicológica , Moclobemida/farmacologia , Inibidores da Monoaminoxidase/farmacologia , Transtornos de Estresse Pós-Traumáticos/tratamento farmacológico , Sinapses/efeitos dos fármacos , Animais , Ansiolíticos/uso terapêutico , Proteína 4 Homóloga a Disks-Large/metabolismo , Medo , Sistema Límbico/efeitos dos fármacos , Sistema Límbico/metabolismo , Masculino , Aprendizagem em Labirinto , Moclobemida/uso terapêutico , Inibidores da Monoaminoxidase/uso terapêutico , Proteínas Qa-SNARE/metabolismo , Ratos , Ratos Wistar , Transtornos de Estresse Pós-Traumáticos/metabolismo , Transtornos de Estresse Pós-Traumáticos/fisiopatologia , Sinapses/metabolismoRESUMO
A ,,sine qua non" requirement for a generic formulation to be admitted for a medical use is to provide bioavailability studies in healthy subjects. Therefore, those studies were performed for 150 mg moclobemide tablets (Jelfa, Poland) versus 150 mg Aurorix (Hoffmann la Roche) reference tablets. An open-label, two-phase crossover study was conducted with 10 healthy subjects. Pharmacokinetic parameters (AUC, ke, t1/2, Cmax, tmax, tlag, V/f, Cl/f) obtained at the same time for moclobemide were supposed to be confronted with the literature data available for healthy volunteers. The plasma moclobemide levels as a function of time were calculated according to either an open one-compartment body model with lag time of absorption or non-compartmental method for calculation of bioavailability using Phoenix WinNonlin 8.0 software. For those reasons a suitable HPLC method was worked out. Carbamazepine was proposed as an internal standard and ammonia as well as Na2HPO4 as alkalizing agents for the mobile phase and the liquid-liquid extraction of moclobemide from human blood plasma, respectively. Basic pharmacokinetic parameters of moclobemide obtained in the paper are essentially equal to the literature data for the healthy subjects. However, bioavailability parameters (AUC0ât, AUC0â∞, Cmax, tmax) were greater for moclobemide tablets (Jelfa) if compared to Aurorix tablets (Roche) by more than 20 %. Furthermore, the extent of bioavailability (110.6 %) for the generic moclobemide tablets if compared to Aurorix tablets is not significantly different. It seems to us that the number of subjects should be increased from 10 to 24 to help to clarify that inconsequence.
Assuntos
Moclobemida/administração & dosagem , Moclobemida/farmacocinética , Inibidores da Monoaminoxidase/administração & dosagem , Inibidores da Monoaminoxidase/farmacocinética , Administração Oral , Adulto , Disponibilidade Biológica , Estudos Cross-Over , Feminino , Humanos , Masculino , Moclobemida/sangue , Inibidores da Monoaminoxidase/sangue , Comprimidos , Equivalência Terapêutica , Adulto JovemRESUMO
A Rh-catalyzed enantioselective hydroamination of allylamines using a chiral BIPHEP-type ligand is reported. Enantioenriched 1,2-diamines are formed in good yields and with excellent enantioselectivities. A diverse array of nucleophiles and amine directing groups are demonstrated, including deprotectable motifs. Finally, the methodology was demonstrated toward the rapid synthesis of 2-methyl-moclobemide.
Assuntos
Compostos Alílicos/síntese química , Aminas/síntese química , Ródio/química , Aminação , Catálise , Complexos de Coordenação/química , Ligantes , Moclobemida/síntese química , EstereoisomerismoRESUMO
OBJECTIVE: The molecular pathway leading to myocardial cellular destruction after acute volume overload (AVO) may include monoamine oxidases. The aim of the present study was to investigate whether moclobemide (Mo), a monoamine oxidase inhibitor, protects the myocardium after AVO. METHODS: Sixty syngeneic Fischer rats underwent surgical abdominal aortocaval fistula to induce AVO. Eighteen rats were treated with Mo 10 mg/kg/day and were compared with 42 untreated rats with AVO without treatment. Myocardial recovery was analyzed using quantitative reverse transcription polymerase chain reaction for hypoxia-inducible factor 1-alpha, inducible nitric oxide synthase, interleukin 6, E-selectin, atrial natriuretic peptide (ANP), brain natriuretic peptide, vascular endothelial growth factor-alpha, matrix metalloproteinase 9, chitinase 3-like protein (YKL-40), and transforming growth factor-beta. RESULTS: After 3 days, the relative number of ischemic intramyocardial arteries in the left ventricle was lower in AVO treated with Mo than in without [0.04 (0.02-0.07) vs. 0.09 (0.07-0.14), point score unit]. After 1 day, ANP was lower in AVO treated with Mo than in without [0.95 (0.37-1.84) vs. 2.40 (1.33-3.09), fold changes from the baseline (FC), p=0.044], whereas after 1 and 3 days, YKL-40 was higher in AVO treated with Mo than in without [22.66 (14.05-28.83) vs. 10.06 (6.23-15.02), FC, p=0.006 and 6.03 (4.72-7.18) vs. 3.70 (2.62-5.35), FC, p=0.025]. CONCLUSION: Mo decreases intramyocardial arterial ischemia of the left ventricle after AVO while increases YKL-40, reflecting cellular protection during early cardiac remodeling. In the future, adding Mo may be a simple means for myocardial protection after AVO.
Assuntos
Insuficiência Cardíaca/tratamento farmacológico , Moclobemida/uso terapêutico , Inibidores da Monoaminoxidase/uso terapêutico , Miocárdio/metabolismo , Substâncias Protetoras/uso terapêutico , Animais , Fator Natriurético Atrial/metabolismo , Modelos Animais de Doenças , Moclobemida/administração & dosagem , Inibidores da Monoaminoxidase/administração & dosagem , Reação em Cadeia da Polimerase , Substâncias Protetoras/administração & dosagem , Ratos , Ratos Endogâmicos F344RESUMO
OBJECTIVE: The main goal of our study was to investigate whether a selective antagonism of the adenosine A1 or A2A receptors is able to enhance the antidepressant activity of commonly prescribed drugs. MATERIALS AND METHODS: All experiments were carried out on male Albino Swiss mice. The forced swim test and the tail suspension test were used to evaluate the antidepressant-like potential. Drug concentrations in animals' serum and brains were measured by high-performance liquid chromatography. KEY FINDINGS: The antidepressant potential of moclobemide (1.5 mg/kg), venlafaxine (1 mg/kg) and bupropion (10 mg/kg) was enhanced by a co-administration with 3,7-dimethyl-1-propargylxanthine (DMPX; an antagonist of adenosine A2A receptors; 3 mg/kg) or 8-cyclopentyl-1,3-dipropylxanthine (an antagonist of adenosine A1 receptors; 1 mg/kg). However, significant interactions between the tested substances were detected only in the experiments with DMPX. The nature of the observed interplays is rather pharmacodynamic than pharmacokinetic, because neither serum nor brain concentrations of the used drugs were significantly increased. CONCLUSIONS: Blockage of the adenosine receptors (particularly the A2A subtypes) could be considered in future as a novel, promising part of the combined antidepressant therapy. However, further studies on this subject are needed.
Assuntos
Antagonistas do Receptor A1 de Adenosina/administração & dosagem , Antagonistas do Receptor A2 de Adenosina/administração & dosagem , Antidepressivos/administração & dosagem , Bupropiona/administração & dosagem , Moclobemida/administração & dosagem , Cloridrato de Venlafaxina/administração & dosagem , Antagonistas do Receptor A1 de Adenosina/metabolismo , Antagonistas do Receptor A2 de Adenosina/metabolismo , Animais , Antidepressivos/metabolismo , Bupropiona/metabolismo , Sinergismo Farmacológico , Quimioterapia Combinada , Locomoção/efeitos dos fármacos , Locomoção/fisiologia , Masculino , Camundongos , Moclobemida/metabolismo , Natação/fisiologia , Natação/psicologia , Cloridrato de Venlafaxina/metabolismoRESUMO
Nicotinic acid (NA), often called niacin, a form of vitamin B3, is a water-soluble nutrient found in animal and vegetarian foods. Vitamin B3 for healthy people is considered to be needed in doses of less than 20 mg daily. In higher doses, NA has been described to be beneficial in some patients with psychiatric disorders. This report describes a male patient with bipolar type II disorder who for many years had been treated with lithium and other medications applied in affective disorders. These pharmacological drugs had beneficial effects but were at times insufficient. When the patient was prescribed NA, he experienced a comparatively strong effect. Slowly it was discovered that the patient could lower and cease all medications except NA. For over 11 years he has been stable and calm with NA and currently takes 1 g three times daily. When not taking NA, he consistently became anxious and depressed within 2-3 days. The resumption of NA resulted in a normal state usually within 1 day. This finding has been described as a vitamin dependency. The paper discusses possible mechanisms for the effect of NA in this patient. Further studies are needed to investigate the prevalence of vitamin B3 dependency and the biochemical explanations for this phenomenon.
Assuntos
Transtorno Bipolar/tratamento farmacológico , Niacina/administração & dosagem , Complexo Vitamínico B/administração & dosagem , Idoso , Anticonvulsivantes/administração & dosagem , Antidepressivos/administração & dosagem , Depressão/tratamento farmacológico , Relação Dose-Resposta a Droga , Humanos , Masculino , Moclobemida/administração & dosagem , Piridinas/administração & dosagem , Resultado do Tratamento , ZolpidemRESUMO
While there is mounting evidence of abnormal reactivity of several brain regions in social anxiety disorder, and disrupted functional connectivity between these regions at rest, relatively little is known regarding resting regional neural activity in these structures, or how such activity is affected by pharmacotherapy. Using 2-deoxy-2-(F-18)fluoro-D-glucose positron emission tomography, we compared resting regional brain metabolism between SAD and healthy control groups; and in SAD participants before and after moclobemide therapy. Voxel-based analyses were confined to a predefined search volume. A second, exploratory whole-brain analysis was conducted using a more liberal statistical threshold. Fifteen SAD participants and fifteen matched controls were included in the group comparison. A subgroup of SAD participants (n = 11) was included in the therapy effect comparison. No significant clusters were identified in the primary analysis. In the exploratory analysis, the SAD group exhibited increased metabolism in left fusiform gyrus and right temporal pole. After therapy, SAD participants exhibited reductions in regional metabolism in a medial dorsal prefrontal region and increases in right caudate, right insula and left postcentral gyrus. This study adds to the limited existing work on resting regional brain activity in SAD and the effects of therapy. The negative results of our primary analysis suggest that resting regional activity differences in the disorder, and moclobemide effects on regional metabolism, if present, are small. While the outcomes of our secondary analysis should be interpreted with caution, they may contribute to formulating future hypotheses or in pooled analyses.
Assuntos
Transtornos de Ansiedade/tratamento farmacológico , Mapeamento Encefálico , Moclobemida/farmacologia , Fobia Social/tratamento farmacológico , Adulto , Transtornos de Ansiedade/fisiopatologia , Encéfalo/efeitos dos fármacos , Encéfalo/fisiopatologia , Feminino , Humanos , Imageamento por Ressonância Magnética/métodos , Masculino , Pessoa de Meia-Idade , Adulto JovemRESUMO
OBJECTIVE: To apply the ' auto-regressive integrated moving average product seasonal model' in predicting the number of hand, foot and mouth disease in Shaanxi province. METHODS: In Shaanxi province, the trend of hand, foot and mouth disease was analyzed and tested, under the use of R software, between January 2009 and June 2015. Multiple seasonal ARIMA model was then fitted under time series to predict the number of hand, foot and mouth disease in 2016 and 2017. RESULTS: Seasonal effect was seen in hand, foot and mouth disease in Shaanxi province. A multiple seasonal ARIMA (2,1,0)×(1,1,0)12 was established, with the equation as (1 -B)(1 -B12)Ln (Xt) =((1-1.000B)/(1-0.532B-0.363B(2))*(1-0.644B12-0.454B12(2)))*Epsilont. The mean of absolute error and the relative error were 531.535 and 0.114, respectively when compared to the simulated number of patients from Jun to Dec in 2015. RESULTS under the prediction of multiple seasonal ARIMA model showed that the numbers of patients in both 2016 and 2017 were similar to that of 2015 in Shaanxi province. CONCLUSION: Multiple seasonal ARIMA (2,1,0)×(1,1,0)12 model could be used to successfully predict the incidence of hand, foot and mouth disease in Shaanxi province.
Assuntos
Doença de Mão, Pé e Boca/epidemiologia , Modelos Estatísticos , Estações do Ano , China/epidemiologia , Previsões , Humanos , Incidência , Moclobemida , SoftwareRESUMO
The elevated T-maze was developed to test the hypothesis that serotonin plays an opposing role in the regulation of defensive behaviors associated with anxiety and panic. Previous pharmacological exploitation of this test supports the association between inhibitory avoidance acquisition and escape expression with anxiety and fear/panic, respectively. In the present study, we extend the pharmacological validation of this test by investigating the effects of other putative or clinically effective anxiety- and panic-modulating drugs. The results showed that chronic, but not acute injection of the reversible monoamine oxidase-A inhibitor moclobemide (3, 10 and 30mg/kg) inhibited escape expression, indicating a panicolytic-like effect. The same effect was observed after either acute or chronic treatment with alprazolam (1, 2 and 4mg/kg), a high potency benzodiazepine. This drug also impaired inhibitory avoidance acquisition, suggesting an anxiolytic effect. On the other hand, subcutaneous administration of the 5-HT1D/1B receptor agonist sumatriptan (0.1, 0.5 and 2.5µg/kg) facilitated escape performance, indicating a panicogenic-like effect, while treatment with α-para-chlorophenylalanine (p-CPA; 4days i.p injections of 100mg/kg, or a single i.p injection of 300mg/kg), which caused marked 5-HT depletion in the amygdala and striatum, was without effect. Altogether, these results are in full agreement with the clinical effects of these compounds and offer further evidence that the elevated T-maze has broad predictive validity for the effects of anxiety- and panic-modulating drugs.
Assuntos
Ansiolíticos/farmacologia , Aprendizagem em Labirinto/efeitos dos fármacos , Pânico/efeitos dos fármacos , Alprazolam/farmacologia , Animais , Encéfalo/efeitos dos fármacos , Encéfalo/metabolismo , Modelos Animais de Doenças , Reação de Fuga/efeitos dos fármacos , Comportamento Exploratório/efeitos dos fármacos , Fenclonina/farmacologia , Locomoção/efeitos dos fármacos , Masculino , Moclobemida/farmacologia , Ratos , Ratos Wistar , Serotonina/metabolismo , Sumatriptana/farmacologiaRESUMO
A mild, one-pot, and environmentally friendly synthesis of amides from aldehydes and amines is described. Initially, a photoorganocatalytic reaction of aldehydes with di-isopropyl azodicarboxylate leads to an intermediate carbonyl imide, which can react with a variety of amines to afford the desired amides. The initial visible light-mediated activation of a variety of monosubstituted or disubstituted aldehydes is usually fast, occurring in a few hours. Following the photocatalytic reaction, addition of the primary amine at room temperature or the secondary amine at elevated temperatures leads to the corresponding amide from moderate to excellent yields without epimerization. This methodology was applied in the synthesis of Moclobemide, a drug against depression and social anxiety.