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1.
Chem Biodivers ; 21(6): e202301903, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38623839

RESUMO

Breast cancer is a global health concern, demanding innovative treatments. Targeting the Transforming Growth Factor-beta (TGF-ß) signaling pathway, pivotal in breast cancer, is a promising approach. TGF-ß inhibits proliferation via G1 phase cell cycle arrest, acting as a suppressor initially, but in later stages, it promotes progression by enhancing motility, invasiveness, and metastasis formation. This study explores naturally occurring flavonoids' interactions with TGF-ß. Using molecular docking against the protein's crystal structure (PDB Id: 1PY5), Gossypin showed the highest docking score and underwent molecular dynamics simulation, revealing complex flexibility and explaining how flavonoids impede TGF-ß signaling in breast cancer. ADMET predictions adhered to Lipinski's rule of Five. Insights into flavonoid-TGF-ß binding offer a novel angle for breast cancer treatment. Flavonoids having a good docking score like gossypin, morin, luteolin and taxifolin shown potent cytotoxic effect on breast cancer cell line, MCF-7. Understanding these interactions could inspire flavonoid-based therapies targeting TGF-ß to halt breast cancer growth. These findings pave the way for personalized, targeted breast cancer therapies, offering hope against this formidable disease.


Assuntos
Neoplasias da Mama , Proliferação de Células , Flavonoides , Simulação de Acoplamento Molecular , Simulação de Dinâmica Molecular , Fator de Crescimento Transformador beta , Humanos , Flavonoides/farmacologia , Flavonoides/química , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/patologia , Neoplasias da Mama/metabolismo , Fator de Crescimento Transformador beta/metabolismo , Fator de Crescimento Transformador beta/antagonistas & inibidores , Proliferação de Células/efeitos dos fármacos , Antineoplásicos/farmacologia , Antineoplásicos/química , Ensaios de Seleção de Medicamentos Antitumorais , Células MCF-7 , Feminino , Relação Estrutura-Atividade , Estrutura Molecular , Sobrevivência Celular/efeitos dos fármacos , Produtos Biológicos/química , Produtos Biológicos/farmacologia , Relação Dose-Resposta a Droga
2.
Arch Pharm (Weinheim) ; 357(2): e2300420, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38013395

RESUMO

This review article provides an overview of the green synthesis of thiazole derivatives, emphasizing sustainable and environmentally friendly methodologies. Thiazole derivatives possess significant value and find diverse applications across various fields. However, conventional synthesis methods often involve hazardous reagents and generate substantial waste, posing environmental concerns. The green synthesis of thiazole derivatives employs renewable starting materials, nontoxic catalysts, and mild reaction conditions to minimize environmental impact. Innovative techniques such as microwave irradiation, ultrasound synthesis, green solvents, a green catalyst-based approach, and mechanochemistry-mediated synthesis are employed, offering advantages in terms of scalability, cost-effectiveness, and purification simplicity. The resulting thiazole derivatives exhibit comparable or enhanced biological activities, showcasing the feasibility and practicality of green synthesis in drug discovery. This review paper underscores the importance of sustainable approaches in functional molecular synthesis and encourages further research in this domain.


Assuntos
Desenho de Fármacos , Tiazóis , Relação Estrutura-Atividade , Tiazóis/farmacologia , Solventes , Descoberta de Drogas
3.
Curr Microbiol ; 79(5): 152, 2022 Apr 09.
Artigo em Inglês | MEDLINE | ID: mdl-35397006

RESUMO

The outstanding research outcomes and registrations of myriads of probiotic strains have flooded the health market with various innovative probiotic-based products and their patents. The study of patented formulations of probiotics can give an overall insight into its existing application. A landscaping review of patents for probiotic-based preparations is presented in the current work. The patent search was performed over commercially available patent databased and analysis tool-PatSeer Pro®. Search strings containing words "Formulation" and "Composition" resulted in more than 3700 patents. Landscaping review of 400 + patents from the last 20 years (2000-2020) was performed using the Text-Mining approach. Text-Mining helped to identify 19 technological clusters which represent these patents. These clusters include the patents of probiotic preparations on animal feed, human food, cosmetics, antimicrobial, antidiabetic, arthritis, etc. A review of this massive number of patents unveiled many exciting preparations. Probiotic-based innovative products for depression, diabetes, Parkinson's, tumor, acne, and animal husbandry are reviewed comprehensively. The present work also unravels a few new-flanged products like probiotic layered condoms, products for acute alcoholism, and traditional Chinese medicine with probiotics. The patent landscape of probiotic-based preparations has presented a whole scenario of probiotic-based preparations. It has also revealed many unexplored areas where innovation can be excelled.


Assuntos
Probióticos , Animais , Mineração de Dados
4.
Am J Emerg Med ; 43: 170-174, 2021 05.
Artigo em Inglês | MEDLINE | ID: mdl-32169387

RESUMO

OBJECTIVE: Blood pressure (BP) measurements are important for managing patients with hypertensive emergencies (HE). Previous studies showed that there was significant difference between IABP and NIBP but no information whether these differences changed management. Our study investigated the factors associated with the differences affecting BP management of patients with HE. METHODS: This was a retrospective study involving adult patients admitted to a resuscitation unit. We screened all patients who received IABP upon admission between 06/01/2017 and 12/31/2017 as sample size calculation recommended 64 patients. Primary outcome was the clinical relevance of the difference of IABP vs. NIBP, which was defined as having both: a) difference of 10 mm of mercury (mmHg), and b) resulting in possible change of blood pressure managements according to treatment guidelines. We performed backward stepwise multivariable logistic regression to measure associations. RESULTS: We analyzed 147 patients whose mean age was 69 (±16) years and included 69 (47%) patients with spontaneous intracerebral hemorrhage (sICH). Mean difference between IABP and NIBP was 21 (±16) mmHg while 41 (28%) patients who had difference affecting managements. In multivariable regression, sICH (Odd Ratios 13.5, 95%CI 2.3-79.5, p-value < 0.001) was significantly associated with clinically relevant difference between the two modalities of BP monitoring. CONCLUSIONS: There was a large difference between IABP and NIBP among patients with hypertensive emergencies. Up to 30% of patients had clinically relevant differences. Patients with sICH were more likely to have differences affecting BP management. Further studies are needed to confirm our observation.


Assuntos
Pressão Arterial , Determinação da Pressão Arterial/métodos , Adulto , Idoso , Cateterismo Periférico , Estado Terminal , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos
5.
Epilepsy Behav ; 110: 107172, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32554180

RESUMO

Neuroticism, a core personality trait characterized by a tendency towards experiencing negative affect, has been reported to be higher in people with temporal lobe epilepsy (TLE) compared with healthy individuals. Neuroticism is a known predictor of depression and anxiety, which also occur more frequently in people with TLE. The purpose of this study was to identify abnormalities in whole-brain resting-state functional connectivity in relation to neuroticism in people with TLE and to determine the degree of unique versus shared patterns of abnormal connectivity in relation to elevated symptoms of depression and anxiety. Ninety-three individuals with TLE (55 females) and 40 healthy controls (18 females) from the Epilepsy Connectome Project (ECP) completed measures of neuroticism, depression, and anxiety, which were all significantly higher in people with TLE compared with controls. Resting-state functional connectivity was compared between controls and groups with TLE with high and low neuroticism using analysis of variance (ANOVA) and t-test. In secondary analyses, the same analytics were performed using measures of depression and anxiety and the unique variance in resting-state connectivity associated with neuroticism independent of symptoms of depression and anxiety identified. Increased neuroticism was significantly associated with hyposynchrony between the right hippocampus and Brodmann area (BA) 9 (region of prefrontal cortex (PFC)) (p < 0.005), representing a unique relationship independent of symptoms of depression and anxiety. Hyposynchrony of connection between the right hippocampus and BA47 (anterior frontal operculum) was associated with high neuroticism and with higher depression and anxiety scores (p < 0.05), making it a shared abnormal connection for the three measures. In conclusion, increased neuroticism exhibits both unique and shared patterns of abnormal functional connectivity with depression and anxiety symptoms between regions of the mesial temporal and frontal lobe.


Assuntos
Epilepsia do Lobo Temporal/diagnóstico por imagem , Lobo Frontal/diagnóstico por imagem , Sistema Límbico/diagnóstico por imagem , Rede Nervosa/diagnóstico por imagem , Neuroticismo/fisiologia , Lobo Temporal/diagnóstico por imagem , Adulto , Conectoma/métodos , Epilepsia do Lobo Temporal/fisiopatologia , Feminino , Lobo Frontal/fisiopatologia , Lateralidade Funcional/fisiologia , Humanos , Sistema Límbico/fisiopatologia , Imageamento por Ressonância Magnética/métodos , Masculino , Pessoa de Meia-Idade , Rede Nervosa/fisiopatologia , Descanso/fisiologia , Lobo Temporal/fisiopatologia
6.
Invest New Drugs ; 37(3): 490-497, 2019 06.
Artigo em Inglês | MEDLINE | ID: mdl-30315379

RESUMO

Background Patients with metastatic colorectal cancer (mCRC) who progress on standard therapies may be eligible for phase I trials. To better delineate the risk-benefit ratio, we assessed toxicities, clinical outcomes and prognostic factors. Methods Records of mCRC patients on phase I trials at our institution over 18 years were reviewed. Univariable (UVA) and multivariable analyses (MVA) were undertaken and a prognostic model developed. Results There were 187 enrollments on 37 phase I trials. Median age was: 59 (29-83) years and number of prior therapies: 3 (0-8). The clinical benefit rate (CBR): response (5.6%) + stable disease, was 43.1%. Median progression free survival (PFS) and overall survival (OS) was 7.7 weeks and 43.7 weeks, respectively. The MVA identified age > 60 years (HR 1.63, p < 0.004), albumin<3.5 g/dL (HR 3.69, p < 0.001), direct bilirubin>ULN (HR1.69, p < 0.01), and WBC ≥ 5.2 k/uL (HR 1.97, p < 0.001) as negative prognostic factors. A risk score based on the MVA revealed that patients with a score of 0-1 had an improved OS (58.7 weeks) compared to a score of 2 (49.9 weeks, p < 0.01) and 3 (14.1 weeks, p < 0.001). Conclusions Phase 1 trials may offer similar or better clinical outcome for mCRC patients than standard third line therapies; the prognostic model could assist in selecting appropriate patients.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias Colorretais/mortalidade , Modelos Estatísticos , Adulto , Idoso , Idoso de 80 Anos ou mais , Protocolos de Quimioterapia Combinada Antineoplásica/farmacocinética , Neoplasias Colorretais/tratamento farmacológico , Neoplasias Colorretais/patologia , Feminino , Seguimentos , Humanos , Masculino , Dose Máxima Tolerável , Pessoa de Meia-Idade , Metástase Neoplásica , Seleção de Pacientes , Prognóstico , Estudos Retrospectivos , Taxa de Sobrevida , Distribuição Tecidual
7.
Epilepsy Behav ; 98(Pt A): 220-227, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-31387000

RESUMO

Behavioral and personality disorders in temporal lobe epilepsy (TLE) have been a topic of interest and controversy for decades, with less attention paid to alterations in normal personality structure and traits. In this investigation, core personality traits (the Big 5) and their neurobiological correlates in TLE were explored using the Neuroticism Extraversion Openness-Five Factor Inventory (NEO-FFI) and structural magnetic resonance imaging (MRI) through the Epilepsy Connectome Project (ECP). NEO-FFI scores from 67 individuals with TLE (34.6 ±â€¯9.5 years; 67% women) were compared to 31 healthy controls (32.8 ±â€¯8.9 years; 41% women) to assess differences in the Big 5 traits (agreeableness, openness, conscientiousness, neuroticism, and extraversion). Individuals with TLE showed significantly higher neuroticism, with no significant differences on the other traits. Neural correlates of neuroticism were then determined in participants with TLE including cortical and subcortical volumes. Distributed reductions in cortical gray matter volumes were associated with increased neuroticism. Subcortically, hippocampal and amygdala volumes were negatively associated with neuroticism. These results offer insight into alterations in the Big 5 personality traits in TLE and their brain-related correlates.


Assuntos
Encéfalo/diagnóstico por imagem , Conectoma/métodos , Epilepsia do Lobo Temporal/diagnóstico por imagem , Neuroticismo , Inventário de Personalidade , Adulto , Tonsila do Cerebelo/diagnóstico por imagem , Tonsila do Cerebelo/fisiologia , Encéfalo/fisiologia , Epilepsia do Lobo Temporal/psicologia , Feminino , Substância Cinzenta/diagnóstico por imagem , Substância Cinzenta/fisiologia , Humanos , Imageamento por Ressonância Magnética/métodos , Masculino , Pessoa de Meia-Idade , Neuroticismo/fisiologia , Personalidade/fisiologia
8.
J Indian Prosthodont Soc ; 17(1): 8-14, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28216839

RESUMO

PURPOSE: The purpose of this in vitro research project was to evaluate and compare the wear behavior of human tooth enamel opposing monolithic zirconia and other different ceramic restorative materials and also to observe the tetragonal to monoclinic phase transformation in zirconia-based ceramics that may occur while simulating wear occurring at room temperature in a wet environment. MATERIALS AND METHODS: A total of sixty samples were prepared for this study. Fifteen discs of glazed zirconia, 15 discs of polished zirconia without glaze, 15 discs of metal ceramic, and 15 discs of lithium disilicate were fabricated. Sixty extracted premolars were collected and randomly divided into four groups of 15 each. The discs and extracted human premolars were placed onto holders on a two-body wear machine under a constant load of 5 kg to simulate the oral wear cycle. A diffractometer was used to analyze phase transformation. One-way analysis of variance and Tukey's post hoc tests was used. RESULTS: The mean loss of height of tooth samples and its standard deviation for Group I (monolithic zirconia with glaze), Group II (mechanically polished monolithic zirconia without glaze), Group III (porcelain fused to metal), and Group IV (glazed monolithic lithium disilicate) was obtained as 0.2716 ± 0.1409, 0.1240 ± 0.0625, 0.1567 ± 0.0996, and 0.2377 ± 0.1350, respectively. The highest mean loss in height was observed in Group I and the least was observed in Group II. CONCLUSION: Mechanically polished zirconia showed the least amount of enamel wear followed by porcelain fused to metal and glazed monolithic lithium disilicate, whereas glazed monolithic zirconia showed the highest enamel wear.

9.
Pharm Res ; 32(1): 248-59, 2015 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-25037862

RESUMO

PURPOSE: Surface area and surface energy of pharmaceutical powders are affected by milling and may influence formulation, performance and handling. This study aims to decouple the contribution of surface area and surface energy, and to quantify each of these factors, on cohesion. METHODS: Mefenamic acid was processed by cryogenic milling. Surface energy heterogeneity was determined using a Surface Energy Analyser (SEA) and cohesion measured using a uniaxial compression test. To decouple the surface area and surface energy contributions, milled mefenamic acid was "normalised" by silanisation with methyl groups, confirmed using X-ray Photoelectron Spectroscopy. RESULTS: Both dispersive and acid-base surface energies were found to increase with increasing milling time. Cohesion was also found to increase with increasing milling time. Silanised mefenamic acid possessed a homogenous surface with a surface energy of 33.1 ± 1.4 mJ/m(2) , for all milled samples. The cohesion for silanised mefenamic acid was greatly reduced, and the difference in the cohesion can be attributed solely to the increase in surface area. For mefenamic acid, the contribution from surface energy and surface area on cohesion was quantified to be 57% and 43%, respectively. CONCLUSIONS: Here, we report an approach for decoupling and quantifying the contribution from surface area and surface energy on powder cohesion.


Assuntos
Anti-Inflamatórios não Esteroides/química , Ácido Mefenâmico/química , Tecnologia Farmacêutica/métodos , Cristalização , Excipientes/química , Microscopia Eletrônica de Varredura , Tamanho da Partícula , Espectroscopia Fotoeletrônica , Pós , Silanos/química , Propriedades de Superfície
10.
Mar Drugs ; 13(8): 5016-58, 2015 Aug 07.
Artigo em Inglês | MEDLINE | ID: mdl-26262627

RESUMO

Halichondrin B is a complex, natural, polyether macrolide derived from marine sponges. Eribulin is a structurally-simplified, synthetic, macrocyclic ketone analogue of Halichondrin B. Eribulin was approved by United States Food and Drug Administration in 2010 as a third-line therapy for metastatic breast cancer patients who have previously been treated with an anthracycline and a taxane. It has a unique microtubule dynamics inhibitory action. Phase III studies have either been completed or are currently ongoing in breast cancer, soft tissue sarcoma, and non-small cell lung cancer. Phase I and II studies in multiple cancers and various combinations are currently ongoing. This article reviews the available information on eribulin with respect to its clinical pharmacology, pharmacokinetics, pharmacodynamics, mechanism of action, metabolism, preclinical studies, and with special focus on clinical trials.


Assuntos
Furanos/farmacologia , Furanos/uso terapêutico , Cetonas/farmacologia , Cetonas/uso terapêutico , Neoplasias/tratamento farmacológico , Animais , Ensaios Clínicos como Assunto , Furanos/farmacocinética , Humanos , Cetonas/farmacocinética , Ensaios Clínicos Controlados Aleatórios como Assunto
11.
Curr Drug Discov Technol ; 21(5): e220124225850, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38258778

RESUMO

BACKGROUND: Numerous naturally occurring and artificially synthesized flavonoids have garnered attention for their impressive ability to combat oxidative stress and scavenge free radicals when evaluated in laboratory settings. The core aim of our investigation revolved around assessing the antioxidant potential of a diverse range of synthesized flavonoids through in vitro experiments. METHOD: We crafted 29 distinct flavonoids using the aldol condensation mechanism via a chalcone intermediate to accomplish this. We meticulously characterized these newly formed compounds using a variety of spectroscopic techniques. We employed the widely recognized DPPH free radical method for the crucial antioxidant evaluation, a benchmark in such studies. RESULT: The radical scavenging efficacy of our synthesized flavonoids was then meticulously compared to that of the positive control, ascorbic acid, renowned for its antioxidant prowess, and the IC50 values for each compound were calculated and examined. Surprisingly, our results showed that the flavonoids we tested had a wide range of antioxidant activity, with IC50 values that ranged from 75.8 ± 8.30 to 397 ± 25.10 µg/mL. CONCLUSION: Intriguingly, compounds US5, US13, US16, US17, US18, and US21 outshone even ascorbic acid in their antioxidant potential, displaying remarkable scavenging abilities against free radicals. This discovery holds promise for further exploration of these compounds as potential antioxidants with potential applications in health and wellness.


Assuntos
Antioxidantes , Compostos de Bifenilo , Flavonoides , Sequestradores de Radicais Livres , Picratos , Flavonoides/farmacologia , Flavonoides/química , Compostos de Bifenilo/química , Picratos/química , Antioxidantes/farmacologia , Antioxidantes/química , Sequestradores de Radicais Livres/farmacologia , Sequestradores de Radicais Livres/química , Ácido Ascórbico/farmacologia , Ácido Ascórbico/química
12.
Am J Transl Res ; 16(6): 2290-2300, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39006298

RESUMO

OBJECTIVES: To evaluate the cardioprotective effects of Gynostemma pentaphyllum Makino in isoproterenol-induced myocardial infarction in rats and to evaluate the role of phosphatidylinositol 3-kinases (PI3K) in cardioprotection. METHODS: The protective effect of the hydroalcoholic leaf extract of Gynostemma pentaphyllum (LEGP) on the heart was investigated against isoproterenol (ISO)-induced MI in rats. Preliminary phytochemical screening was performed followed by molecular docking. For the in vivo studies Wistar albino rats (Male) were divided among different groups. Different parameters were evaluated such as heart weight index, Electrocardiogram (ECG) analysis, triphenyl tetrazolium chloride assay, cardiac enzyme markers, oxidative stress, antioxidant enzymes, PI3K levels, and histopathology of cardiac tissue. RESULTS: Results showed that LEGP improved the electrocardiogram, reduced infarct size, and decreased the levels of cardiac enzyme markers and oxidative stress, while antioxidant enzymes and PI3K levels were increased. CONCLUSION: LEGP protected the heart against ISO-induced MI in rats by improving hemodynamic, biochemical and histological attributes. These protective effects were produced by the phytoconstituents of the LEGP through modulation of the PI3K signalling pathway.

13.
Am J Transl Res ; 16(7): 2777-2792, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39114703

RESUMO

Introduction: The kinetics of brain cell death in Alzheimer's disease (AD) is being studied using mathematical models. These mathematical models utilize techniques like differential equations, stochastic processes, and network theory to explore crucial signalling pathways and interactions between different cell types. One crucial area of research is the intentional cell death known as apoptosis, which is crucial for the nervous system. The main purpose behind the mathematical modelling of this is for identification of which biomarkers and pathways are most influential in the progression of AD. In addition, we can also predict the natural history of the disease, by which we can make early diagnosis. Mathematical modelling of AD: Current mathematical models include the Apolipoprotein E (APOE) Gene Model, the Tau Protein Kinetics Model, and the Amyloid Beta Peptide Kinetic Model. The Bcl-2 and Bax apoptosis theories postulate that the balance of pro- and anti-apoptotic proteins in cells determines whether a cell experiences apoptosis, where the Bcl-2 model, depicts the interaction of pro- and anti-apoptotic proteins, it is also being used in research on cell death in a range of cell types, including neurons and glial cells. How peptides are produced and eliminated in the brain is explained by the Amyloid beta Peptide (Aß) Kinetics Model. The tau protein kinetics model focuses on production, aggregation, and clearance of tau protein processes, which are hypothesized to be involved in AD. The APOE gene model investigates the connection between the risk of Alzheimer's disease and the APOE gene. These models have been used to predict how Alzheimer's disease would develop and to evaluate how different inhibitors will affect the illness's course. Conclusion: These mathematical models reflect physiological meaningful characteristics and demonstrates robust fits to training data. Incorporating biomarkers like Aß, Tau, APOE and markers of neuronal loss and cognitive impairment can generate sound predictions of biomarker trajectories over time in Alzheimer's disease.

14.
Arch Physiol Biochem ; : 1-12, 2024 Apr 08.
Artigo em Inglês | MEDLINE | ID: mdl-38588401

RESUMO

CONTEXT: Peripheral neuropathy (PN) is a multifaceted complication characterized by nerve damage due to oxidative stress, inflammatory mediators, and dysregulated metabolic processes. Early PN manifests as sensory changes that develop progressively in a "stocking and glove" pattern. METHODS AND MECHANISMS: A thorough review of literature has been done to find the molecular pathology, clinical trials that have been conducted to screen the effects of different drugs, current treatments and novel approaches used in PN therapy. Diabetic neuropathy occurs due to altered protein kinase C activity, elevated polyol pathway activity in neurons, and Schwann cells-induced hyperglycemia. Other causes involve chemotherapy exposure, autoimmune ailments, and chronic ethanol intake. CONCLUSION: Symptomatic treatments for neuropathic pain include use of tricyclic antidepressants, anticonvulsants, and acetyl-L-carnitine. Patients will have new hope if clinicians focus on novel therapies including gene therapy, neuromodulation techniques, and cannabidiol as an alternative to traditional medications, as management is still not ideal.

15.
Curr Protein Pept Sci ; 25(8): 638-650, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38706351

RESUMO

BACKGROUND: Interaction of PD-1 protein (present on immune T-cell) with its ligand PD-L1 (over-expressed on cancerous cell) makes the cancerous cell survive and thrive. The association of PD-1/PD-L1 represents a classical protein-protein interaction (PPI), where receptor and ligand binding through a large flat surface. Blocking the PD-1/PDL-1 complex formation can restore the normal immune mechanism, thereby destroying cancerous cells. However, the PD-1/PDL1 interactions are only partially characterized. OBJECTIVE: We aim to comprehend the time-dependent behavior of PD-1 upon its binding with PD-L1. METHODS: The current work focuses on a molecular dynamics simulation (MDs) simulation study of apo and ligand bound PD-1. RESULTS: Our simulation reveals the flexible nature of the PD-1, both in apo and bound form. Moreover, the current study also differentiates the type of strong and weak interactions which could be targeted to overcome the complex formation. CONCLUSION: The current article could provide a valuable structural insight about the target protein (PD-1) and its ligand (PD-L1) which could open new opportunities in developing small molecule inhibitors (SMIs) targeting either PD-1 or PD-L1.


Assuntos
Antígeno B7-H1 , Simulação de Dinâmica Molecular , Receptor de Morte Celular Programada 1 , Ligação Proteica , Antígeno B7-H1/química , Antígeno B7-H1/metabolismo , Antígeno B7-H1/genética , Antígeno B7-H1/imunologia , Receptor de Morte Celular Programada 1/química , Receptor de Morte Celular Programada 1/metabolismo , Receptor de Morte Celular Programada 1/genética , Receptor de Morte Celular Programada 1/imunologia , Humanos , Ligantes , Sítios de Ligação
16.
ADMET DMPK ; 12(1): 63-105, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38560713

RESUMO

Background and Purpose: The blood-brain barrier (BBB), a critical interface of specialized endothelial cells, plays a pivotal role in regulating molecular and ion transport between the central nervous system (CNS) and systemic circulation. Experimental Approach: This review aims to delve into the intricate architecture and functions of the BBB while addressing challenges associated with delivering therapeutics to the brain. Historical milestones and contemporary insights underscore the BBB's significance in protecting the CNS. Key Results: Innovative approaches for enhanced drug transport include intranasal delivery exploiting olfactory and trigeminal pathways, as well as techniques like temporary BBB opening through chemicals, receptors, or focused ultrasound. These avenues hold the potential to reshape conventional drug delivery paradigms and address the limitations posed by the BBB's selectivity. Conclusion: This review underscores the vital role of the BBB in maintaining CNS health and emphasizes the importance of effective drug delivery through this barrier. Nanoparticles emerge as promising candidates to overcome BBB limitations and potentially revolutionize the treatment of CNS disorders. As research progresses, the application of nanomaterials shows immense potential for advancing neurological therapeutics, albeit with careful consideration of safety aspects.

17.
JAMA Netw Open ; 7(7): e2421485, 2024 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-38990570

RESUMO

Importance: Patients from racial and ethnic minority groups (eg, Asian, Hispanic, and non-Hispanic Black patients) have low representation in clinical trials, especially in phase 1 trials in cancer. These trials represent valuable options for patients with advanced cancer who experience disease progression with standard therapy. Objective: To determine whether the benefit of enrollment to phase 1 cancer trials extends to Asian, Hispanic, and non-Hispanic Black patients as much as it does for non-Hispanic White patients. Data Sources: Patient records at a single institution from January 1999 to December 2016 were reviewed. Treatment-related responses, toxic effects, and deaths were recorded. Study Selection: All phase 1 studies were included. Data Extraction and Synthesis: Data underwent independent extraction by multiple observers following the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) reporting guideline. Main Outcomes and Measures: The primary outcome was overall survival (OS), assessed using univariate and multivariable time-to-event analyses. Results: A total of 738 patients (median [range], 60 [22-93] years; 467 [63.3] female) including 197 Hispanic patients (26.7%), 238 non-Hispanic Black patients (32.2%), and 282 non-Hispanic White patients (38.2%), were enrolled in 64 phase 1 trials, including 33 cytotoxic trials (51.5%), 21 biologic trials (32.8%), and 10 combined therapy trials (15.6%). The primary cancer diagnoses were colorectal (187 patients [25.3%]), ovarian (141 patients [19.1%]), lung (58 patients [7.9%]), uterine (49 patients [6.6%]), and breast (41 patients [5.6%]). Patients underwent a median (range) of 3 (0-13) therapies prior to trial enrollment. Among 558 patients evaluated for response, the clinical benefit rate (ie, stable disease plus response rates) was 49.1%, and the overall response rate was 6.5%. Grade 3 or 4 nonhematological toxic effects were observed in 27.8% (95% CI, 24.6%-31.3%) of patients and grade 3 or 4 hematological toxic effects were observed in 19.7% (95% CI, 17.0%-22.8%) of patients. The treatment-related mortality rate was 0.9% (95% CI, 0.4%-1.9%). Median OS was 9.6 (95% CI, 8.2-11.0) months among Hispanic patients, 8.3 (95% CI, 6.7-10.4) months among non-Hispanic Black patients, and 9.8 (95% CI, 8.5-11.4) months among non-Hispanic White patients (P = .13). In a multivariable analysis, age older than 60 years, Eastern Cooperative Oncology Group performance status score of 2 or greater, more than 2 metastatic sites, lactate dehydrogenase grade 1 or 2, grade 2 or greater low albumin, grade 1 or greater total bilirubin, and grade 2 or greater anemia were associated with worse prognosis, whereas leukocytosis greater than grade 1 was associated with better OS. Conclusions and Relevance: In this meta-analysis assessing outcomes in phase 1 cancer trials among patients from racial and ethnic minority groups, Hispanic and non-Hispanic Black patients had benefits similar to those of non-Hispanic White patients.


Assuntos
Ensaios Clínicos Fase I como Assunto , Minorias Étnicas e Raciais , Neoplasias , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem , Negro ou Afro-Americano , Hispânico ou Latino , Neoplasias/etnologia , Neoplasias/mortalidade , Neoplasias/terapia , Resultado do Tratamento , Asiático , Brancos
18.
Curr Top Med Chem ; 2024 Aug 06.
Artigo em Inglês | MEDLINE | ID: mdl-39108108

RESUMO

Synthetic routes of chromene are an area of thrust research due to its wide application as pigments, agrochemicals, cosmetics, and an important nucleus scaffold for various pharmaco-logically active drugs. The chromene nucleus is an important moiety for the discovery of new drug candidates owing to its broad range of pharmacological actions like antitumor, anti-inflammatory, antiviral, and many others. However, traditional synthesis techniques frequently use unsafe reagents and produce hazardous waste, presenting environmental issues. The eco-friendly production of chromene derivatives utilizes sustainable raw materials, non-toxic cata-lysts, and gentle reaction conditions to reduce ecological consequences. Innovative methods like microwave irradiation, ultrasound synthesis, the use of environmentally friendly solvents, a cata-lyst-based approach with minimal environmental impact, and mechanochemistry-mediated syn-thesis are implemented. These approaches provide benefits in scalability, cost-effectiveness, and ease of purification. This review compiles and presents various recently reported green synthetic strategies of chromene and its derivatives and gives the reader a clear idea of the detailed and crit-ical aspects of various synthetic protocols described.

19.
Gynecol Oncol ; 131(1): 163-8, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23877015

RESUMO

OBJECTIVES: There is a scarcity of outcome data regarding phase 1 trials for patients with gynecologic malignancy. The objective of this study was to assess toxicity, clinical benefit and prognosticators in gynecologic oncology patients participating in phase 1 trials. METHODS: All phase 1 oncology trials conducted at Albert Einstein Cancer Center from 1999 to 2010 were reviewed and extracted for relevant demographic and clinical data concerning patients with gynecologic malignancy. Cox-proportional and logistic regression modeling were used for multivariate analysis. RESULTS: 120 distinct patients with gynecologic malignancy participated in 41 trials, constituting 30.6% of all phase 1 patients enrolled in the same time period. The median age is 59 years. Out of the 184 patients enrolled, 160 individual responses were evaluable. Seventeen DLT events (9.2%) occurred, including 1 (0.5%) treatment-related mortality. There were 27.2%≥ grade 3 hematologic and 24.4% non-hematologic toxicity. Eighty patients had stable disease (SD, 50%), including 21.9% with SD ≥ 4 months, 11 (6.3%) with partial response (PR), and 3 (1.9%) achieving complete response (CR). The clinical benefit rate (CBR=SD+CR+PR) was 58.1%. Albumin (Alb)≤ 3.5 g/dL and abnormal ANC were independent negative prognosticators of survival. We also found a continuous correlation between changes in Albumin (p=0.02) and LDH (p=0.02) and odds of achieving CBR≥4month. CONCLUSIONS: Our clinical outcome and safety data suggested that phase 1 trials may be a reasonable option for patients with advanced and recurrent gynecologic cancer. The potential prognosticators identified should be further validated in larger trials.


Assuntos
Antineoplásicos/efeitos adversos , Antineoplásicos/uso terapêutico , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias dos Genitais Femininos/tratamento farmacológico , Neutrófilos , Idoso , Intervalo Livre de Doença , Feminino , Humanos , Estimativa de Kaplan-Meier , Contagem de Leucócitos , Pessoa de Meia-Idade , Modelos de Riscos Proporcionais , Albumina Sérica/metabolismo , Resultado do Tratamento
20.
J Natl Compr Canc Netw ; 11(4): 424-9, 2013 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-23584345

RESUMO

Malignant brain tumors are aggressive tumors with a very poor prognosis. Survival is on average 12 to 18 months. Patients with malignant gliomas are subject to multiple medical problems that can significantly impact their overall survival and quality of life, including seizures, cerebral edema, venous thromboembolism, cognitive and psychiatric disorders, and side effects of chemotherapy, such as nausea, vomiting, myelosuppression, constipation, and diarrhea. This article examines the evidence for managing many of these issues to reduce symptoms and improve quality of life.


Assuntos
Neoplasias Encefálicas/terapia , Glioma/terapia , Cuidados Paliativos/métodos , Adulto , Edema Encefálico/etiologia , Edema Encefálico/terapia , Neoplasias Encefálicas/complicações , Transtornos Cognitivos/etiologia , Transtornos Cognitivos/terapia , Glioma/complicações , Humanos , Náusea/etiologia , Náusea/terapia , Qualidade de Vida , Convulsões/etiologia , Convulsões/terapia , Trombose Venosa/etiologia , Trombose Venosa/terapia , Vômito/etiologia , Vômito/terapia
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