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1.
Chem Biodivers ; : e202400473, 2024 May 09.
Artigo em Inglês | MEDLINE | ID: mdl-38723201

RESUMO

Sulfur-containing heterocyclic derivatives have been disclosed for binding with a wide range of cancer-specific protein targets. Various interesting derivatives of sulfur-containing heterocyclics such as benzothiazole, thiazole, thiophene, thiazolidinedione, benzothiophene, and phenothiazine, etc have been shown to inhibit diverse signaling pathways implicated in cancer. Significant progress has also been made in molecular targeted therapy against specific enzymes such as kinase receptors due to potential binding interactions inside the ATP pocket. Sulfur-containing heterocyclic ring metal complexes i.e., benzothiazole, thiazole, thiophene, benzothiophene and phenothiazines are among the most promising active anticancer compounds. However, sulfur heteroaromatic rings, particularly thiophene, are of high structural alert due to their metabolism to reactive metabolites. The mere presence of a structural alert itself does not determine compound toxicity therefore, this review focuses on some specific findings that shed light on factors influencing the toxicity. In the current review, synthetic strategies of introducing the sulfur core ring in the synthesized derivatives are discussed with their structure-activity relationships to enhance our understanding of toxicity mechanisms and develop safer therapeutic options. The sulfur-containing marketed anticancer drugs included in this review direct the synthesis of novel compounds and will help in the development of potent, safer sulfur-based anticancer drugs in near future.

2.
Curr Neuropharmacol ; 22(6): 992-1015, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-36606589

RESUMO

Neurodegenerative disorders (NDDs) are multifaceted complex disorders that have put a great health and economic burden around the globe nowadays. The multi-factorial nature of NDDs has presented a great challenge in drug discovery and continuous efforts are in progress in search of suitable therapeutic candidates. Nature has a great wealth of active principles in its lap that has cured the human population since ancient times. Natural products have revealed several benefits over conventional synthetic medications and scientists have shifted their vision towards exploring the therapeutic potentials of natural products in the past few years. The structural mimicking of natural compounds to endogenous ligands has presented them as a potential therapeutic candidate to prevent the development of NDDs. In the presented review, authors have summarized demographical facts about various NDDs including Alzheimer's disease (AD), Parkinson's disease (PD), Huntington's disease (HD) and various types of sclerosis in the brain. The significant findings of new active principles of natural origin along with their therapeutic potentials on NDDs have been included. Also, a description of clinical trials and patents on natural products has been enlisted in this compilation. Although natural products have shown promising success in drug discovery against NDDs, still their use is associated with several ethical issues which need to be solved in the upcoming time.


Assuntos
Doença de Alzheimer , Produtos Biológicos , Doenças Neurodegenerativas , Doença de Parkinson , Humanos , Produtos Biológicos/farmacologia , Produtos Biológicos/uso terapêutico , Produtos Biológicos/química , Doenças Neurodegenerativas/tratamento farmacológico , Doença de Parkinson/tratamento farmacológico , Doença de Alzheimer/tratamento farmacológico , Descoberta de Drogas
3.
Eur J Med Chem ; 258: 115609, 2023 Oct 05.
Artigo em Inglês | MEDLINE | ID: mdl-37421889

RESUMO

Leishmaniasis is a parasitic disease and categorised as a neglected tropical disease (NTD). Each year, between 70,0000 and 1 million new cases are believed to occur. There are approximately 90 sandfly species which can spread the Leishmania parasites (over 20 species) causing 20,000 to 30,000 death per year. Currently, leishmaniasis has no specific therapeutic treatment available. The prescribed drugs with several drawbacks including high cost, challenging administration, toxicity, and drug resistance led to search for the alternative treatment with less toxicity and selectivity. Introducing the molecular features like that of phytoconstituents for the search of compounds with less toxicity is another promising approach. The current review classifies the synthetic compounds according to the core rings present in the natural phytochemicals for the development of antileishmanial agents (2020-2022). Considering the toxicity and limitations of synthetic analogues, natural compounds are at the higher notch in terms of effectiveness and safety. Synthesized compounds of chalcones (Compound 8; IC50: 0.03 µM, 4.7 folds more potent than Amphotericin B; IC50: 0.14 µM), pyrimidine (compound 56; against L. tropica; 0.04 µM and L. infantum; 0.042 µM as compared to glucantime: L. tropica; 8.17 µM and L. infantum; 8.42 µM), quinazoline and (compound 72; 0.021 µM, 150 times more potent than miltefosine). The targeted delivery against DHFR have been demonstrated by one of the pyrimidine compounds 62 with an IC50 value of 0.10 µM against L. major as compared to the standard trimethoprim (IC50: 20 µM). The review covers the medicinal importance of antileishmanial agents from synthetic and natural sources such as chalcone, pyrazole, coumarins, steroids, and alkaloidal-containing drugs (indole, quinolines, pyridine, pyrimidine, carbolines, pyrrole, aurones, and quinazolines). The efforts of introducing the core rings present in the natural phytoconstituents as antileishmanial in the synthetic compounds are discussed with their structural activity relationship. The perspective will support the medicinal chemists in refining and directing the development of novel molecules phytochemicals-based antileishmanial agents.


Assuntos
Antiprotozoários , Leishmania , Leishmaniose , Parasitos , Medicamentos Sintéticos , Animais , Humanos , Medicamentos Sintéticos/uso terapêutico , Leishmaniose/tratamento farmacológico , Antiprotozoários/química
4.
Mol Cell Biochem ; 478(8): 1669-1687, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-36495372

RESUMO

The sodium dependent SLC13 family transporters comprise of five genes SLC13A1, SLC13A2 (NaDC1), SLC13A3 (NaDC3), SLC13A4 and SLC13A5 (NaCT). Among them, NaDC1, NaDC3 and NaCT are sodium dependent transporters belonging to family of dicarboxylates (succinate, malate, α-ketoglutarate) and tricarboxylates (citrate). The mouse and the human NaCT structures have still not been crystallized, therefore structural information is taken from the related bacterial transporter of VcINDY. Citrate in the cytosol works as a precursor for the fatty acid synthesis, cholesterol, and low-density lipoproteins. The excess citrate from the matrix is translocated to the cytosol for fatty acid synthesis through these transporters and thus controls the energy balance by downregulating the glycolysis, tricarboxylic acid (TCA), and fatty acid breakdown. These transporters play an important role in regulating various metabolic diseases including cancer, diabetes, obesity, fatty liver diseases and CNS disorders. These di and tricarboxylate transporters are emerging as new targets for metabolic disorders such as obesity and diabetes. The mutation in the function of the NaCT causes several neurological diseases including neonatal epilepsy and impaired brain development whereas mutation of genes coding for citrate transport present in the liver may provide positive effect. Therefore, continued efforts from the earlier work on citrate transporters are required for the development of citrate inhibitors. This review discusses the structure, function, and regulation of the NaCT transporter. The review also highlights citrate role in diagnosing diseases such as cancer, diabetes, fatty liver, and diabetes. The therapeutic perspective of synthetic inhibitors against NaCT transporters is succinctly summarized.


Assuntos
Doenças Metabólicas , Simportadores , Animais , Camundongos , Humanos , Sódio , Citratos , Ácido Cítrico/metabolismo , Proteínas de Membrana Transportadoras , Ácidos Tricarboxílicos , Doenças Metabólicas/tratamento farmacológico , Doenças Metabólicas/genética , Obesidade , Ácidos Graxos , Simportadores/genética , Transportadores de Sulfato
5.
Pestic Biochem Physiol ; 185: 105138, 2022 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-35772841

RESUMO

Chlorpyrifos (CP) and its highly electrophilic intermediates are principal toxic metabolites. The active form of CP i.e. chlorpyrifos oxon (CP-oxon) is responsible for both the insecticidal activity and is also of greater risk when present in the atmosphere. Thus, the combined effects of both CP, CP-oxan, and other metabolites enhance our understanding of the safety and risk of the insecticide CP. They cause major toxicities such as AChE inhibition, oxidative stress, and endocrine disruption. Further, it can have adverse hematological, musculoskeletal, renal, ocular, and dermal effects. Excessive use of this compound results in poisoning and potentially kills a non-target species upon exposure including humans. Several examples of reactive metabolites toxicities on plants, aquatic life, and soil are presented herein. The review covers the general overview on reactive metabolites of CP, chemistry and their mechanism through toxic effects on humans as well as on the environment. Considerable progress has been made in the replacement or alternative to CP. The different strategies including antidote mechanisms for the prevention and treatment of CP poisoning are discussed in this review. The approach analyses also the active metabolites for the pesticide activity and thus it becomes more important to know the pesticide and toxicity dose of CP as much as possible.


Assuntos
Clorpirifos , Inseticidas , Praguicidas , Clorpirifos/química , Clorpirifos/toxicidade , Saúde Ambiental , Humanos , Inseticidas/toxicidade , Estresse Oxidativo , Praguicidas/toxicidade
6.
Eur J Med Chem ; 234: 114269, 2022 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-35306287

RESUMO

Gamma-Aminobutyric Acid (GABA) inhibitory neurotransmitter departs an energetic role in brain signalling system. Levels of GABA in the brain influence human behaviour, diminishes in the degree of GABA can cause seizures, depression, Parkinson's. To put it plainly, it plays a basic part in the significant issues of mind. It is exceptionally important to cure the issues linked to GABA. Writing overview proposed that nipecotic acid is an intense GABA reuptake inhibitor. This scaffold is likewise present in one of the promoted anticonvulsant drugs 'Tiagabine'. Tiagabine is only drug in the market which works through this mechanism however the medication is regulated with one more prescription for the synergistic impact. Nipecotic acid has several disadvantages such as it can't cross the blood-brain barrier because of its hydrophilic and zwitterionic nature. To avoid this problem nipecotic acid scaffold hybrids with the different aromatic groups can enhance the physical (lipophilicity) as well as biological properties of the resultant compound. So, there is a dire requirement for compounds that work through this mechanism. Several medicinal chemists and researchers are already working in this field and developed outstanding newer molecules. This review article compiles these developed new hybrids along with design strategies, structure-activity relationship, and biological activity as well as in silico studies. This review also demonstrates the synthesis of nipecotic acid and the core mechanism through which nipecotic acid acts as a GABA reuptake inhibitor.


Assuntos
Inibidores da Captação de GABA , Ácidos Nipecóticos , Anticonvulsivantes/química , Humanos , Ácidos Nipecóticos/química , Ácidos Nipecóticos/farmacologia , Tiagabina , Ácido gama-Aminobutírico
7.
Curr Neuropharmacol ; 20(8): 1519-1553, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-34344289

RESUMO

Epilepsy is a chronic neurological disorder, characterized by the predisposition of unprovoked seizures affecting the neurobiological, psychological, cognitive, economic, and social wellbeing of the patient. As per the 2019 report by World Health Organization, it affects nearly 80% of the population, which comes from middle to low-income countries. It has been suggested that 70% of such cases can be treated effectively if properly diagnosed. It is one of the most common neurological diseases affecting 50 million people globally. Most of the antiepileptic drugs used in clinical practice are only 60-80% effective in controlling the disease. These drugs suffer from serious drawbacks of non-selectivity and toxicity that limit their clinical usefulness. Hence, there is a need to search for safe, potent, and effective anti-epileptic drugs. One of the emerging strategies to discover and develop selective and non-toxic anticonvulsant molecules focuses on the design of non-nitrogen heterocyclic compounds (NNHC). Drugs such as valproic acid, gabapentin, viagabatrin, fluorofelbamate, tiagabine, progabide, pregabalin, gamma amino butyric acid (GABA), etc. do not contain a nitrogen heterocyclic ring but are as effective anticonvulsants as conventional heterocyclic nitrogen compounds. This review covers the various classes of NNHC which have been developed in the recent past as anticonvulsants along with their chemistry, percentage yield, structure-activity relationship and biological activity. The most potent compound in each series has been identified for comparative studies, for further structural modification and to improve the pharmacokinetic profile. Various optimized synthetic pathways and diverse functionalities other than nitrogen-containing rings discussed in the article may help medicinal chemists to design safe and effective anticonvulsant drugs in near future.


Assuntos
Anticonvulsivantes , Epilepsia , Anticonvulsivantes/farmacologia , Anticonvulsivantes/uso terapêutico , Epilepsia/tratamento farmacológico , Humanos , Nitrogênio/uso terapêutico , Convulsões/tratamento farmacológico , Relação Estrutura-Atividade
8.
Eur J Med Chem ; 226: 113890, 2021 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-34628237

RESUMO

Several generations of antiepileptic drugs (AEDs) are available in the market for the treatment of seizures, but these are amalgamated with acute to chronic side effects. The most common side effects of AEDs are dose-related, but some are idiosyncratic adverse drug reactions (ADRs) that transpire due to the formation of reactive metabolite (RM) after the bioactivation process. Because of the adverse reactions patients usually discontinue the medication in between the treatment. The AEDs such as valproic acid, lamotrigine, phenytoin etc., can be categorized under such types because they form the RM which may prevail with life-threatening adverse effects or immune-mediated reactions. Hepatotoxicity, teratogenicity, cutaneous hypersensitivity, dizziness, addiction, serum sickness reaction, renal calculi, metabolic acidosis are associated with the metabolites of drugs such as arene oxide, N-desmethyldiazepam, 2-(1-hydroxyethyl)-2-methylsuccinimide, 2-(sulphamoy1acetyl)-phenol, E-2-en-VPA and 4-en-VPA and carbamazepine-10,11-epoxide, etc. The major toxicities are associated with the moieties that are either capable of forming RM or the functional groups may itself be too reactive prior to the metabolism. These functional groups or fragment structures are typically known as structural alerts or toxicophores. Therefore, minimizing the bioactivation potential of lead structures in the early phases of drug discovery by a modification to low-risk drug molecules is a priority for the pharmaceutical companies. Additionally, excellent potency and pharmacokinetic (PK) behaviour help in ensuring that appropriate (low dose) candidate drugs progress into the development phase. The current review discusses about RMs in the anticonvulsant drugs along with their mechanism vis-a-vis research efforts that have been taken to minimize the toxic effects of AEDs therapy.


Assuntos
Anticonvulsivantes/efeitos adversos , Anticonvulsivantes/metabolismo , Convulsões/tratamento farmacológico , Anticonvulsivantes/uso terapêutico , Humanos , Estrutura Molecular
9.
Bioorg Chem ; 115: 105230, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34416507

RESUMO

Voltage-gated sodium channel blockers are one of the vital targets for the management of several central nervous system diseases, including epilepsy, chronic pain, psychiatric disorders, and spasticity. The voltage-gated sodium channels play a key role in controlling cellular excitability. This reduction in excitotoxicity is also applied to improve the symptoms of epileptic conditions. The effectiveness of antiepileptic drugs as sodium channel depends upon the reversible blocking of the spontaneous discharge without blocking its propagation. There are number of antiepileptic drug(s) which are in pipeline to flour the market to conquer abnormal neuronal excitability. They inhibit the seizures through the inhibition of complex voltage- and frequency-dependent ionic currents through sodium channels. Over the past decade, the sodium channel is one of the most explored targets to control or treat the seizure, but there has not been any game-changing discovery yet. Although there are large numbers of drugs approved for the treatment of epilepsy, however they are associated with several acute to chronic side effects. Many research groups have tirelessly worked for better therapeutic medication on this popular target to treat epileptic seizures. The review quotes briefly the developments of the approved examples of sodium channel blockers as anticonvulsant drugs. Medicinal chemists have tried the design and development of some more potent anticonvulsant drugs to minimize the toxicity that are discussed here, and an emphasis is given for their possible mechanism and the structure-activity relationship (SAR).


Assuntos
Anticonvulsivantes/farmacologia , Convulsões/tratamento farmacológico , Canais de Sódio/metabolismo , Bloqueadores do Canal de Sódio Disparado por Voltagem/farmacologia , Animais , Anticonvulsivantes/química , Relação Dose-Resposta a Droga , Desenvolvimento de Medicamentos , Humanos , Estrutura Molecular , Convulsões/metabolismo , Relação Estrutura-Atividade , Bloqueadores do Canal de Sódio Disparado por Voltagem/química
10.
Bioorg Med Chem ; 28(15): 115585, 2020 08 01.
Artigo em Inglês | MEDLINE | ID: mdl-32631563

RESUMO

Epilepsy is one of the commonly prevailing neurological disorders. According to the reports, it is evident that about 80% of the epileptic cases have been observed in developing countries. Although there are many drugs with significant potency available in the market; still there is an issue of selectivity and toxicity. Therefore, continuous attempts have been made by the researchers to develop newer therapeutic agents against epilepsy. Many synthetic strategies have been available in the literature to synthesize various classes of anticonvulsants with promising activity. In the presented review, authors have summarized some newer synthetic routes being used for the synthesis of nitrogen-containing anticonvulsants taking a cue from the reported established anticonvulsant drugs viz. vigabatrin, sodium valproate, oxcarbazepine, felbamate, retigabine, and gabapentin. Various derivatives with the substitution for better anticonvulsant profile have been described in the figures for easy comparative study. The structure-activity relationship (SAR) of compounds with maximum potency has also been discussed. This article may serve as a boost for the researchers to modify the pre-existing synthetic routes as well as to improve potency and yield of the compounds.


Assuntos
Anticonvulsivantes/uso terapêutico , Compostos Heterocíclicos/uso terapêutico , Convulsões/tratamento farmacológico , Animais , Anticonvulsivantes/síntese química , Compostos Heterocíclicos/síntese química , Humanos , Estrutura Molecular , Relação Estrutura-Atividade
11.
Curr Med Chem ; 27(35): 5970-6014, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31393240

RESUMO

This review presents the detailed account of factors leading to cancer and design strategy for the synthesis of benzimidazole derivatives as anticancer agents. The recent survey for cancer treatment in Cancer facts and figures 2017 American Chemical Society has shown progressive development in fighting cancer. Researchers all over the world in both developed and developing countries are in a continuous effort to tackle this serious concern. Benzimidazole and its derivatives showed a broad range of biological activities due to their resemblance with naturally occurring nitrogenous base i.e. purine. The review discussed benzimidazole derivatives showing anticancer properties through a different mechanism viz. intercalation, alkylating agents, topoisomerases, DHFR enzymes, and tubulin inhibitors. Benzimidazole derivatives act through a different mechanism and the substituents reported from the earlier and recent research articles are prerequisites for the synthesis of targeted based benzimidazole derivatives as anticancer agents. The review focuses on an easy comparison of the substituent essential for potency and selectivity through SAR presented in figures. This will further provide a better outlook or fulfills the challenges faced in the development of novel benzimidazole derivatives as anticancer.


Assuntos
Antineoplásicos/farmacologia , Benzimidazóis/farmacologia , Relação Estrutura-Atividade
12.
Bioorg Chem ; 94: 103418, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-31708229

RESUMO

The increase in psychiatric and neurological disorders includes Parkinson's, Schizophrenia, Alzheimer's and Depression over the last 50 years adds concerns to society. In contrast, there have been great advances in elucidating the receptors of CNS and their interaction with the novel molecules. Enzymes inhibitors are on the top plan to interact specifically with the targets for better potency and reduce the toxic effects. COMT inhibitors work by inhibiting the conversion of catechols including dopamine to its inactive degradation products. This makes the availability of l-dopa to the brain and thus alleviating the symptoms of CNS disorders. Substitution pattern and the structural requirements for better binding within the receptors are important for the drug findings. Apart from catechol modification, some non-catechol based potent COMT inhibitors are also discussed. A detailed guide regarding inhibition of S-adenosyl-l-methionine, catalyzing the transfer of the methyl group by COMT is also represented. This review discusses the thorough development of COMT inhibitors right from the beginning until the present. The derivatives are discussed along with their structure-activity relationship having structural substitution prerequisites for the development of more potent novel COMT inhibitors.


Assuntos
Inibidores Enzimáticos/uso terapêutico , Transtornos Mentais/tratamento farmacológico , Doenças do Sistema Nervoso/tratamento farmacológico , Inibidores Enzimáticos/farmacologia , Humanos , Modelos Moleculares
13.
Bioorg Chem ; 88: 102962, 2019 07.
Artigo em Inglês | MEDLINE | ID: mdl-31085373

RESUMO

A series of 9-(2-(1-arylethylidene)hydrazinyl)acridine and its analogs were designed, synthesized and evaluated for biological activities. Various biochemical assays were performed to determine the free radical scavenging capacity of synthesized compounds (4a-4j). Anticancer activity of these compounds was assessed against two different human cancer cell lines viz cervical cancer cells (HeLa) and liver cancer cells (HepG2) as well as normal human embryonic kidney cell line (HEK 293). Compounds 4b, 4d and 4e showed potential anti-proliferative effects on HeLa cells. Based on results obtained from antioxidant and cytotoxicity studies, 4b, 4d and 4e were further studied in detail for different biological activities. 4b, 4d and 4e reduced the cell growth, inhibited metastatic activity and declined the potential of cell migration in HeLa cell lines. Topoisomerase1 (Top1) treated with compounds 4b, 4d and 4e exhibited inhibition of Top1 and prevented DNA replication. Molecular docking results validate that interaction of compounds 4b, 4d and 4e with Top1-DNA complex, which might be accountable for their inhibitory effects. Further it was concluded that compounds 4b, 4d and 4e arrests the cells at S phase and consequently induces cell death through DNA damage in HeLa cells.


Assuntos
Acridinas/farmacologia , Antineoplásicos/farmacologia , DNA Topoisomerases Tipo I/metabolismo , Inibidores da Topoisomerase I/farmacologia , Acridinas/síntese química , Acridinas/química , Antineoplásicos/síntese química , Antineoplásicos/química , Proliferação de Células/efeitos dos fármacos , Relação Dose-Resposta a Droga , Ensaios de Seleção de Medicamentos Antitumorais , Células HEK293 , Células HeLa , Humanos , Estrutura Molecular , Relação Estrutura-Atividade , Inibidores da Topoisomerase I/síntese química , Inibidores da Topoisomerase I/química
14.
Eur J Med Chem ; 158: 559-592, 2018 Oct 05.
Artigo em Inglês | MEDLINE | ID: mdl-30243157

RESUMO

Alzheimer, the fourth leading cause of death embodies a key responsible event including formation of ß-amyloid protein clustering to amyloid plaque on blood vessels. The origin of above events is Amyloid precursor protein (APP) which is an integral membrane protein known for its function in synapses formation. Modern research had proposed that the over expression of DYRK1A (Dual specificity tyrosine phosphorylation regulated kinase1A, a family of protein kinases, positioned within the Down's syndrome critical region (DSCR) on human chromosome 21causes phosphorylation of APP protein resulting in its cleavage to Aß 40, 42 and tau proteins (regulated by beta and gamma secretase) which plays critical role in early onset of Alzheimer's disease (AD) detected in Down's syndrome (DS), leading to permanent functional and structural deformities which results ultimately into neuro-degeneration and neuronal death. Therefore, DYRK1A emerges as a potential target for prevention of neuro-degeneration and hence Alzheimer. Presently, the treatment methods for Down's syndrome, as well as Alzheimer's disease are extremely biased and represent a major deficiency for therapeutic necessities. We hereby, focus our review on the current status of the research and contributions in the development of DYRK1A inhibitors.


Assuntos
Doença de Alzheimer/tratamento farmacológico , Síndrome de Down/tratamento farmacológico , Descoberta de Drogas/métodos , Inibidores de Proteínas Quinases/química , Inibidores de Proteínas Quinases/farmacologia , Proteínas Serina-Treonina Quinases/antagonistas & inibidores , Proteínas Tirosina Quinases/antagonistas & inibidores , Doença de Alzheimer/metabolismo , Doença de Alzheimer/fisiopatologia , Animais , Desenho Assistido por Computador , Síndrome de Down/metabolismo , Síndrome de Down/fisiopatologia , Humanos , Terapia de Alvo Molecular/métodos , Neurogênese/efeitos dos fármacos , Inibidores de Proteínas Quinases/uso terapêutico , Proteínas Serina-Treonina Quinases/metabolismo , Proteínas Tirosina Quinases/metabolismo , Quinases Dyrk
15.
Artif Cells Nanomed Biotechnol ; 46(sup2): 46-57, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29560744

RESUMO

The study performed molecular docking, formulated, characterized thymoquinone (TQ) loaded solid lipid nano particles (TQSLN) and exhibited comparative antidepressant activity. TQ loaded nano lipid formulations were prepared by solvent injection methods and characterize for different in-vitro parameters. The optimized formulation was evaluated for depression using unpredictable chronic mild stress (UCMS) model for a period of six weeks. TQSLN was assessed in modified forced swim test (MFST), tail suspension test (TST), locomotor activity followed by biochemical parameters such as monoaminesand brain derived neurotrophic factor (BDNF). The results of molecular docking study revealed that TQ has shown greater affinity and tighter binding capacity for the active site of neurotransmitter receptors. TQSLN showed nanometric size, optimum zeta potential with high percent encapsulation and lower poly dispersity index (PDI). Transmission electron microscopy (TEM) images showed spherical shape without aggregation and agglomeration of particles. The in-vivo study result revealed that the higher amount of TQ reaches to the target region by showing higher levels of monoamines 5 hydroxytryptamine (5-HT), dopamine (DA) and norepinephrine (NE) as compared to thymoquinone suspension (TQS) in brain. In conclusion, the nano lipid formulation remarkably improved the bio-efficacy of TQ and demonstrated a promising perspective for oral delivery of poorly water-soluble drugs.


Assuntos
Benzoquinonas/química , Benzoquinonas/farmacologia , Composição de Medicamentos , Lipídeos/química , Simulação de Acoplamento Molecular , Nanopartículas/química , Animais , Monoaminas Biogênicas/metabolismo , Fator Neurotrófico Derivado do Encéfalo/metabolismo , Fármacos do Sistema Nervoso Central/química , Fármacos do Sistema Nervoso Central/farmacologia , Hipocampo/efeitos dos fármacos , Hipocampo/metabolismo , Locomoção/efeitos dos fármacos , Masculino , Conformação Molecular , Tamanho da Partícula , Ratos , Ratos Wistar
16.
Bioorg Chem ; 78: 158-169, 2018 08.
Artigo em Inglês | MEDLINE | ID: mdl-29571113

RESUMO

A new series of benzimidazole linked pyrazole derivatives were synthesized by cyclocondensation reaction through one-pot multicomponent reaction in absolute ethanol. All the synthesized compounds were tested for their in vitro anticancer activities on five human cancer cell lines including MCF-7, HaCaT, MDA-MB231, A549 and HepG2. EGFR receptor inhibitory activities were carried out for all the compounds. Majority of the compounds showed potent antiproliferative activity against the tested cancer cell lines. Compound 5a showed the most effective activity against the lungs cancer cell lines (IC50 = 2.2 µM) and EGFR binding (IC50 = 0.97 µM) affinity as compared to other members of the series. Compound 5a inhibited growth of A549 cancer cells by inducing a strong G2/M phase arrest. In addition, same compound inhibited growth of A549 cancer cells by inducing apoptosis. In molecular docking studies compound 5a was bound to the active pocket of the EGFR (PDB 1M17) with five key hydrogen bonds and two π-π interaction with binding energies ΔG = -34.581 Kcal/mol.


Assuntos
Antineoplásicos/farmacologia , Benzimidazóis/farmacologia , Inibidores de Proteínas Quinases/farmacologia , Pirazóis/farmacologia , Animais , Antineoplásicos/síntese química , Antineoplásicos/química , Apoptose/efeitos dos fármacos , Benzimidazóis/síntese química , Benzimidazóis/química , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Relação Dose-Resposta a Droga , Ensaios de Seleção de Medicamentos Antitumorais , Receptores ErbB/antagonistas & inibidores , Receptores ErbB/metabolismo , Feminino , Humanos , Fígado/efeitos dos fármacos , Fígado/metabolismo , Simulação de Acoplamento Molecular , Fosforilação/efeitos dos fármacos , Inibidores de Proteínas Quinases/síntese química , Inibidores de Proteínas Quinases/química , Pirazóis/síntese química , Pirazóis/química , Ratos , Relação Estrutura-Atividade
17.
Bioorg Chem ; 77: 74-83, 2018 04.
Artigo em Inglês | MEDLINE | ID: mdl-29334622

RESUMO

A series of new hybrid benzothiazole containing pyridazinones derivatives were designed and synthesized fulfilling all the pharmacophoric requirements essential for the anticonvulsant activity. In-silico and in vitro studies revealed that some of these hybrid derivatives demonstrated admirable GABA AT inhibitory activity. An attempt has also been made to validate the results of in vitro GABA AT inhibition of the most potent compound SPS-5F (IC50 9.10 µM) through in vivo anticonvulsant screening. Compound SPS-5F administration significantly increases the whole brain GABA level, might be through the inhibition of GABA AT enzyme.


Assuntos
Anticonvulsivantes/farmacologia , Desenho de Fármacos , Piridazinas/farmacologia , Convulsões/tratamento farmacológico , Animais , Anticonvulsivantes/síntese química , Anticonvulsivantes/química , Encéfalo/efeitos dos fármacos , Relação Dose-Resposta a Droga , Camundongos , Estrutura Molecular , Piridazinas/síntese química , Piridazinas/química , Relação Estrutura-Atividade
18.
Arch Pharm (Weinheim) ; 350(10)2017 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-28863231

RESUMO

A series of new hybrid benzimidazole containing pyridazinones derivatives were designed and synthesized in accordance with the pharmacophoric requirements essential for the anticonvulsant activity. The synthesized compounds were evaluated for anticonvulsant activity on mice by the gold standard maximal electroshock (MES) and subcutaneous pentylenetetrazole (scPTZ)-induced seizure models. Among the compounds tested, SS-4F showed significant anticonvulsant activity in both the screens with ED50 values of 25.10 and 85.33 mg/kg in the MES and scPTZ screens, respectively. Compound SS-4F emerged as safer and effective anticonvulsant due to its several-fold higher protective indices. Further, the gamma-aminobutyric acid (GABA) estimation result showed a marked increase in the GABA level (1.7-fold) as compared to the control, which was further confirmed by good binding properties with the GABAA receptor.


Assuntos
Anticonvulsivantes/farmacologia , Benzimidazóis/farmacologia , Piridazinas/farmacologia , Convulsões/tratamento farmacológico , Animais , Anticonvulsivantes/síntese química , Anticonvulsivantes/química , Benzimidazóis/síntese química , Benzimidazóis/química , Modelos Animais de Doenças , Relação Dose-Resposta a Droga , Eletrochoque , Feminino , Masculino , Camundongos , Pentilenotetrazol , Piridazinas/síntese química , Piridazinas/química , Relação Estrutura-Atividade , Ácido gama-Aminobutírico/metabolismo
19.
Bioorg Chem ; 71: 181-191, 2017 04.
Artigo em Inglês | MEDLINE | ID: mdl-28215601

RESUMO

New N3-benzylidene (substituted)-2-phenyl-N4-(thiazol-2-yl)-quinazoline-3,4-(4H)-diamine derivatives were design and synthesized by a sequence of reactions starting from appropriate 6-methyl anthranilic acid. The title compounds were screened for in vitro dipeptidyl peptidase IV (DPP-4) inhibitory activity and diphenyl-2-picryl-hydrazyl (DPPH) assay and results showed significant to good activity in compared to Linagliptin for antidiabetic activity and Ascorbic acid for antioxidant activity. Compound 7g (IC50=0.76nM) exhibited most promising DPP-4 inhibitory activity and also showed good antioxid and result. Docking study was also performed to provide an insight about the binding mode into binding sites of DPP-4 enzyme. Hopefully in future, compound 7g could be used as a lead compound for developing new antidiabetic agent with good antioxidant property.


Assuntos
Antioxidantes/química , Diabetes Mellitus Experimental/tratamento farmacológico , Inibidores da Dipeptidil Peptidase IV/química , Desenho de Fármacos , Hipoglicemiantes/química , Quinazolinas/química , Animais , Antioxidantes/síntese química , Antioxidantes/farmacologia , Antioxidantes/uso terapêutico , Compostos de Bifenilo/antagonistas & inibidores , Diabetes Mellitus Experimental/enzimologia , Dipeptidil Peptidase 4/metabolismo , Inibidores da Dipeptidil Peptidase IV/síntese química , Inibidores da Dipeptidil Peptidase IV/farmacologia , Inibidores da Dipeptidil Peptidase IV/uso terapêutico , Radicais Livres/antagonistas & inibidores , Hipoglicemiantes/síntese química , Hipoglicemiantes/farmacologia , Hipoglicemiantes/uso terapêutico , Simulação de Acoplamento Molecular , Picratos/antagonistas & inibidores , Quinazolinas/síntese química , Quinazolinas/farmacologia , Quinazolinas/uso terapêutico , Ratos Wistar , Tiazóis/síntese química , Tiazóis/química , Tiazóis/farmacologia , Tiazóis/uso terapêutico
20.
Eur J Med Chem ; 126: 853-869, 2017 Jan 27.
Artigo em Inglês | MEDLINE | ID: mdl-27987485

RESUMO

The synthesis of benzimidazole linked oxadiazole derivatives designed as potential EGFR and erbB2 receptor inhibitors with anticancer and apoptotic activity were studied. Compounds 7a specifically inhibit EGFR and erbB2 receptor at 0.081 and 0.098 µM concentration. Some of the compounds showed strong, broad-spectrum antiproliferative activitiy when tested against five human cancer cell lines. Compounds 7a and 7n were more cytotoxic than 5-fluorouracil against MCF-7 cancer cell, with IC50 values of 5.0 and 2.55 µM whereas, only 7a led to cell cycle arrest at G2/M phase accompanied by an increase in apoptosis. Compounds 7a and 7n showed normal architecture of myofibrils in cardiomyopathy study whereas only compound 7a showed nearly equal biochemical parameters (SGOT and SGPT) when compared to control. Molecular docking & 3D-QSAR studies were used to establish interactions of 7a and 7n within the active site of enzyme for ATP binding site of kinase domain.


Assuntos
Benzimidazóis/síntese química , Benzimidazóis/farmacologia , Desenho de Fármacos , Receptores ErbB/antagonistas & inibidores , Simulação de Acoplamento Molecular , Relação Quantitativa Estrutura-Atividade , Receptor ErbB-2/antagonistas & inibidores , Animais , Antineoplásicos/síntese química , Antineoplásicos/metabolismo , Antineoplásicos/farmacologia , Antineoplásicos/toxicidade , Benzimidazóis/metabolismo , Benzimidazóis/toxicidade , Cardiomiopatias/induzido quimicamente , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Técnicas de Química Sintética , Ensaios de Seleção de Medicamentos Antitumorais , Receptores ErbB/química , Receptores ErbB/metabolismo , Feminino , Humanos , Fígado/efeitos dos fármacos , Fosforilação/efeitos dos fármacos , Domínios Proteicos , Inibidores de Proteínas Quinases/síntese química , Inibidores de Proteínas Quinases/metabolismo , Inibidores de Proteínas Quinases/farmacologia , Inibidores de Proteínas Quinases/toxicidade , Ratos , Receptor ErbB-2/metabolismo
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