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1.
Gels ; 10(5)2024 May 17.
Artigo em Inglês | MEDLINE | ID: mdl-38786260

RESUMO

The present study delves into the evolution of traditional Ayurvedic oil preparations through innovative strategies to develop advanced gel formulations, aiming at amplifying their therapeutic efficacy. Ayurvedic oils have a rich historical context in healing practices, yet their conversion into contemporary gel-based formulations represents a revolutionary approach to augment their medicinal potential. The primary objective of this transformation is to leverage scientific advancements and modern pharmaceutical techniques to enhance the application, absorption, and overall therapeutic impact of these traditional remedies. By encapsulating the essential constituents of Ayurvedic oils within gel matrices, these novel strategies endeavor to improve their stability, bioavailability, and targeted delivery mechanisms. This review highlights the fusion of traditional Ayurvedic wisdom with cutting-edge pharmaceutical technology, paving the way for more effective and accessible utilization of these revered remedies in modern healthcare.

2.
Nanotechnology ; 35(26)2024 Apr 10.
Artigo em Inglês | MEDLINE | ID: mdl-38502955

RESUMO

Background.Insulin, commonly used for diabetes treatment, needs better ways to improve its effectiveness and safety due to its challenges with poor permeability and stability. Various system has been developed for oral peptide delivery. The non-targeted system can prevent gastric and enzymatic degradation of peptides but cannot increase the bulk transport of peptides across the membrane. However, the non-selectivity is the limitation of the existing system. Numerous carbohydrate-binding receptors overexpressed on intestinal macrophage cells (M-cells) of gut-associated lymphoid tissue. It is the most desirable site for receptor-mediated endocytosis and lymphatic drug delivery of peptides.Objective. The prime objective of the study was to fabricate mannose ligand conjugated nanoparticles (MNPs) employing a quality-by-design approach to address permeability challenges after oral administration. Herein, the study's secondary objective of this study is to identify the influencing factor for producing quality products. Considering this objective, the Lymphatic uptake of NPs was selected as a quality target product profile (QTPP), and a systematic study was conducted to identify the critical formulation attributes (CFAs) and critical process parameters (CPP) influencing critical quality attributes (CQAs). Mannosylated Chitosan concentrations (MCs) and TPP concentrations were identified as CFAs, and stirring speed was identified as CPP.Methods. MNPs were prepared by the inotropic gelation method and filled into the enteric-coated capsule to protect from acidic environments. The effect of CFAs and CPP on responses like particle size (X) and entrapment (Y) was observed by Box-Behnken design (BBD). ANOVA statistically evaluated the result to confirm a significant level (p< 0.05). The optimal conditions of NPs were obtained by constructing an overlay plot and determining the desirability value. HPLC and zeta-seizer analysis characterized the lyophilized NPs. Cell-line studies were performed to confirm the safety and M-cell targeting of NPs to enhance Insulin oral bioavailability.Results. The morphology of NPs was revealed by SEM. The developed NPs showed a nearly oval shape with the average size, surface potential, and % drug entrapment were 245.52 ± 3.37 nm, 22.12 ± 2.13 mV, and 76.15 ± 1.3%, respectively. MTT assay result exhibited that MNPs safe and Confocal imaging inference that NPs selectively uptake by the M-cell.Conclusion. BBD experimental design enables the effective formulation of optimized NPs. The statistical analysis estimated a clear assessment of the significance of the process and formulation variable. Cell line study confirms that NPs are safe and effectively uptake by the cell.


Assuntos
Quitosana , Nanopartículas , Portadores de Fármacos/química , Sistemas de Liberação de Medicamentos , Administração Oral , Peptídeos , Insulina , Nanopartículas/química , Tamanho da Partícula , Quitosana/química
3.
Microb Pathog ; 165: 105493, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35307600

RESUMO

Present investigation evaluates the protective effect of vanillin against sepsis. Sepsis was induced by cecal ligation and puncture (CLP) in rat and vanillin was administered at dose of 100 and 200 mg/kg p.o. for five days after induction of sepsis. Effect of vanillin was observed on the percentage of survival, body weight and food intake were determined in CLP induced sepsis rats. Level of liver enzymes in the serum and organ weight was also observed in vanillin treated CLP induced rats. Moreover, histopathological changes were also observed in liver and lung tissue of hematoxylin and eosin (H&E) staining. There was significant improvement in bodyweight and food intake in vanillin treated group than negative control group after the sepsis induction. Moreover, vanillin improves the percentage of survival rate and reduces the level of liver enzymes and spleen weight in CLP induced sepsis rat. It also improves the level of glutathione (GSH) compared to negative control group. In conclusion, data of investigation reveals that vanillin ameliorates the survival rate and oxidative stress in CLP induced sepsis rat model.


Assuntos
Ceco , Sepse , Animais , Benzaldeídos , Ceco/patologia , Modelos Animais de Doenças , Glutationa , Ligadura , Punções , Ratos , Sepse/tratamento farmacológico
4.
Nat Genet ; 53(10): 1456-1468, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34594038

RESUMO

Glioma intratumoral heterogeneity enables adaptation to challenging microenvironments and contributes to therapeutic resistance. We integrated 914 single-cell DNA methylomes, 55,284 single-cell transcriptomes and bulk multi-omic profiles across 11 adult IDH mutant or IDH wild-type gliomas to delineate sources of intratumoral heterogeneity. We showed that local DNA methylation disorder is associated with cell-cell DNA methylation differences, is elevated in more aggressive tumors, links with transcriptional disruption and is altered during the environmental stress response. Glioma cells under in vitro hypoxic and irradiation stress increased local DNA methylation disorder and shifted cell states. We identified a positive association between genetic and epigenetic instability that was supported in bulk longitudinally collected DNA methylation data. Increased DNA methylation disorder associated with accelerated disease progression and recurrently selected DNA methylation changes were enriched for environmental stress response pathways. Our work identified an epigenetically facilitated adaptive stress response process and highlights the importance of epigenetic heterogeneity in shaping therapeutic outcomes.


Assuntos
Neoplasias Encefálicas/genética , Plasticidade Celular/genética , Epigênese Genética , Glioma/genética , Análise de Célula Única , Estresse Fisiológico/genética , Evolução Clonal , Variações do Número de Cópias de DNA/genética , Metilação de DNA/genética , Regulação Neoplásica da Expressão Gênica , Heterogeneidade Genética , Genoma Humano , Humanos , Mutação/genética , Filogenia , Regiões Promotoras Genéticas/genética , Microambiente Tumoral/genética
5.
Cancer Cell ; 39(5): 694-707.e7, 2021 05 10.
Artigo em Inglês | MEDLINE | ID: mdl-33836152

RESUMO

Extrachromosomal, circular DNA (ecDNA) is emerging as a prevalent yet less characterized oncogenic alteration in cancer genomes. We leverage ChIA-PET and ChIA-Drop chromatin interaction assays to characterize genome-wide ecDNA-mediated chromatin contacts that impact transcriptional programs in cancers. ecDNAs in glioblastoma patient-derived neurosphere and prostate cancer cell cultures are marked by widespread intra-ecDNA and genome-wide chromosomal interactions. ecDNA-chromatin contact foci are characterized by broad and high-level H3K27ac signals converging predominantly on chromosomal genes of increased expression levels. Prostate cancer cells harboring synthetic ecDNA circles composed of characterized enhancers result in the genome-wide activation of chromosomal gene transcription. Deciphering the chromosomal targets of ecDNAs at single-molecule resolution reveals an association with actively expressed oncogenes spatially clustered within ecDNA-directed interaction networks. Our results suggest that ecDNA can function as mobile transcriptional enhancers to promote tumor progression and manifest a potential synthetic aneuploidy mechanism of transcription control in cancer.


Assuntos
Cromossomos/genética , DNA de Neoplasias/genética , Glioblastoma/genética , Oncogenes/genética , Carcinogênese/genética , Cromatina/genética , Humanos
6.
J Adv Res ; 23: 163-205, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32154036

RESUMO

Diabetes or diabetes mellitus is a complex or polygenic disorder, which is characterized by increased levels of glucose (hyperglycemia) and deficiency in insulin secretion or resistance to insulin over an elongated period in the liver and peripheral tissues. Thiazolidine-2,4-dione (TZD) is a privileged scaffold and an outstanding heterocyclic moiety in the field of drug discovery, which provides various opportunities in exploring this moiety as an antidiabetic agent. In the past few years, various novel synthetic approaches had been undertaken to synthesize different derivatives to explore them as more potent antidiabetic agents with devoid of side effects (i.e., edema, weight gain, and bladder cancer) of clinically used TZD (pioglitazone and rosiglitazone). In this review, an effort has been made to summarize the up to date research work of various synthetic strategies for TZD derivatives as well as their biological significance and clinical studies of TZDs in combination with other category as antidiabetic agents. This review also highlights the structure-activity relationships and the molecular docking studies to convey the interaction of various synthesized novel derivatives with its receptor site.

7.
Eur J Med Chem ; 180: 562-612, 2019 10 15.
Artigo em Inglês | MEDLINE | ID: mdl-31344615

RESUMO

Heterocycles occupy a salient place in chemistry due to their wide range of activity in the fields of drug design, photochemistry, agrochemicals, dyes, and so on. Amongst all, indole scaffold is considered as one of the most promising heterocycles found in natural and synthetic sources and has been shown to possess various biological activity, including anti-inflammatory, anti-HIV, antitubercular, antimalarial, anticonvulsant, antidiabetic, antihypertensive, analgesics, antidepressant, anticancer, antioxidant, antifungal, and antimicrobial, etc. All the reported indole molecules bind to multiple receptors with high affinity, thus expedite the research on the development of novel biologically active compounds through the various approach. In this review, we aimed to highlight synthetic and medicinal perspective on the development of indole-based analogs. In addition, structural activity relationship (SAR) study to correlate for their biological activity also discussed.


Assuntos
Indóis/síntese química , Indóis/farmacologia , Animais , Fármacos Anti-HIV/síntese química , Fármacos Anti-HIV/química , Fármacos Anti-HIV/farmacologia , Anti-Infecciosos/síntese química , Anti-Infecciosos/química , Anti-Infecciosos/farmacologia , Anti-Hipertensivos/síntese química , Anti-Hipertensivos/química , Anti-Hipertensivos/farmacologia , Antimaláricos/síntese química , Antimaláricos/química , Antimaláricos/farmacologia , Antituberculosos/síntese química , Antituberculosos/química , Antituberculosos/farmacologia , Humanos , Hipoglicemiantes/síntese química , Hipoglicemiantes/química , Hipoglicemiantes/farmacologia , Indóis/química , Estrutura Molecular , Relação Estrutura-Atividade
8.
Otol Neurotol ; 40(2): e150-e159, 2019 02.
Artigo em Inglês | MEDLINE | ID: mdl-30624408

RESUMO

HYPOTHESIS: We hypothesize that genomic variants including deletions, insertions, inversions, and tandem duplications beyond the changes in tumor suppressor NF2 gene affect gene expression of tumor-specific pathways in vestibular schwannomas (VS) patients with Neurofibromatosis type 2 (NF2), thus contributing to their clinical behavior. BACKGROUND: Genomic variation could reconfigure transcription in NF2 transformation process. Therefore, genome-wide high-resolution characterization of structural variants (SV) landscapes in NF2 tumors can expand our understanding of the genes regulating the clinical phenotypes in NF2-associated VS. METHODS: We performed whole-genome haplotype-specific structural variation analysis using synthetic linked reads generated through microfluidics-based barcoding of high molecular weight DNA followed by high-coverage Illumina paired-end whole-genome sequencing from 10 patients' tumors of different growth rates and their matching blood samples. RESULTS: NF2 tumor-specific deletions and large SVs were detected and can be classified based on their association with tumor growth rates. Through detailed annotation of these mutations, we uncover common alleles affected by these deletions and large SVs that can be associated with signaling pathways implicated in cell proliferation and tumorigenesis. CONCLUSION: The genomic variation landscape of NF2-related VS was investigated through whole-genome linked-read sequencing. Large SVs, in addition to deletions, were identified and may serve as modulators of clinical behavior.


Assuntos
Neurofibromatose 2/genética , Neuroma Acústico/genética , Variação Genética , Estudo de Associação Genômica Ampla , Humanos , Masculino , Mutação
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