Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 55
Filtrar
1.
Cell Biochem Biophys ; 2024 May 13.
Artigo em Inglês | MEDLINE | ID: mdl-38740667

RESUMO

Diabetes mellitus is a serious and complex metabolic disorder characterized by hyperglycemia. In recent years natural products has gained much more interest by researchers as alternative sources for diabetes treatment. Though many potential agents are identified so far but their clinical utility is limited because of their adverse effects. Therefore, there is a keen interest in discovering natural compounds to treat diabetes efficiently with less side effects. Dalbergia latifolia is well explored because of its diverse pharmacological activities including diabetes. Therefore, the present research work aimed to identify and isolate the potential antidiabetic agents from the heart wood of Dalbergia latifolia. We successfully extracted DGN and ISG from the heartwood and evaluated their antidiabetic potential both in-vivo and in-vitro. Alpha amylase activity inhibition of ISG and DGN was found to be 99.05 ± 8.54% (IC50 = 0.6025 µg/mL) and 84.68 ± 5.2% (IC50 = 0.0216 µg/mL) respectively. Glucose uptake assay revealed DGN (158%) promoted maximum uptake than ISG (77%) over control. In vivo anti diabetic activity was evaluated by inducing diabetes in SD rats with the help of HFD and STZ (35 mg/kg body weight). After the continuous administration of DGN (5 mg/kg, 10 mg/kg) and ISG (5 mg/kg, 10 mg/kg) for 14 days, we observed the reduction in the blood glucose levels, body weight, total cholesterol, low density lipoprotein, very low-density lipoprotein, blood urea, serum creatinine, serum glutamate oxaloacetic transaminase, serum glutamate pyruvate transaminase and alkaline phosphatase levels than vehicle group indicates the potency of ISG and DGN against diabetes.

3.
Sci Rep ; 13(1): 10454, 2023 Jun 28.
Artigo em Inglês | MEDLINE | ID: mdl-37380867

RESUMO

The present work experimentally analyses the flow behaviour near the T-shaped spur dike field with no seepage, 5%, and 10% downward seepage. Experiments were aimed at analysing the channel morphology with different discharges. According to the results, downward seepage movement causes significant modification in the channels bed elevation and the development of scour depth. The maximum scour depth is observed at the edge of the first spur dike facing the flow. The rate of scouring also increases with the effect of seepage. Due to downward seepage, the flow distribution is shifted near the channel bed. However, near the channel boundary attained some velocity, significantly enhancing the sediment transport rate. The wake zone between the spur dikes saw very low-velocity magnitudes of positive and negative values. This reveals secondary current generation inside the loop and cross-stream circulation. With an increment of seepage percentage, the velocity, Reynold shear stress, and turbulent kinetic energy magnitude also rise close to the channel's boundary.

4.
Int J Biol Macromol ; 224: 810-830, 2023 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-36302483

RESUMO

Diabetic retinopathy (DR) is one of the chronic complications of diabetes. It includes retinal blood vessels' damage. If untreated, it leads to loss of vision. The existing treatment strategies for DR are expensive, invasive, and need expertise during administration. Hence, there is a need to develop a non-invasive topical formulation that can penetrate deep to the posterior segment of retina and treat the damaged retinal vessels. In addition, it should also provide sustained release. In recent years, novel drug delivery systems (NDDS) have been explored for treating DR and found successful. In this study, chitosan (CS) modified 5-Fluorouracil Nanostructured Lipid Carriers (CS-5-FU-NLCs) were prepared by modified melt emulsification-ultrasonication method and optimized by Box-Behnken Design. The size, polydispersity index, zeta potential and entrapment efficiency of CS-5-FU-NLCs were 163.2 ± 2.3 nm, 0.28 ± 1.52, 21.4 ± 0.5 mV and 85.0 ± 0.2 %, respectively. The in vitro drug release and ex vivo permeation study confirmed higher and sustained drug release in CS-5-FU-NLCs as compared to 5-FU solution. HET-CAM Model ensured the non-irritant nature of CS-5-FU-NLCs. In vivo ocular studies of CS-5-FU-NLCs confirmed antiangiogenic effect of 5-FU by CAM model and diabetic retinopathy induced rat model, indicating successful delivery of 5-FU to the retina.


Assuntos
Antineoplásicos , Quitosana , Diabetes Mellitus , Retinopatia Diabética , Nanoestruturas , Ratos , Animais , Fluoruracila , Portadores de Fármacos , Lipídeos , Tamanho da Partícula , Liberação Controlada de Fármacos
5.
Assay Drug Dev Technol ; 20(8): 349-358, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-36473162

RESUMO

Simvastatin (SIM) is known to lower cholesterol levels and is speculated in the pathogenesis of Alzheimer's disease. In this study, the bioanalytical method of SIM SNEDDS was developed and validated for the estimation of SIM in the rat's plasma using reverse-phase high-performance liquid chromatography. C-18 reverse-phase octadecylsilyl column was used to validate the method. Atorvastatin (ATV) was used as an internal standard. Gradient elution was performed using acetonitrile and water in a ratio of 90:10 with a flow rate of 1 mL/min. The chromatogram of these both compounds SIM and ATV was detected at a wavelength of 238 and 244 nm. The drugs were extracted from the plasma samples using the protein precipitation method. The retention time of SIM and ATV was found to be 3.720 and 8.331 min, respectively. The developed method was found to be linear in the range between 50 and 250 ng/mL, with a regression coefficient (r2) of 0.9994. According to ICH M10 guidelines, the method was validated. The percent of drug recovery was more than 95% and the % relative standard deviation was <2% in the replicate studies, which showed that the method was accurate and precise. The limit of detection and limit of quantification were found in rat plasma to be 0.12 and 0.38 ng/mL, respectively. The obtained result indicated that the developed method was successful in estimating SIM in rat plasma and passed all validation test parameters.


Assuntos
Cromatografia de Fase Reversa , Sinvastatina , Ratos , Animais , Cromatografia Líquida de Alta Pressão/métodos , Cromatografia de Fase Reversa/métodos , Reprodutibilidade dos Testes
6.
Pharmaceutics ; 14(11)2022 Nov 21.
Artigo em Inglês | MEDLINE | ID: mdl-36432734

RESUMO

Diabetic foot ulcer (DFU) is a multifactorial disease and one of the complications of diabetes. The global burden of DFU in the health sector is increasing at a tremendous rate due to its cost management related to hospitalization, medical costs and foot amputation. Hence, to manage DFU/DWs, various attempts have been made, including treating wounds systematically/topically using synthetic drugs, herbal drugs, or tissue engineering based surgical dressings. However, less attention has been paid to the intrinsic factors that are also the leading cause of diabetes mellitus (DM) and its complications. One such factor is gut dysbiosis, which is one of the major causes of enhancing the counts of Gram-negative bacteria. These bacteria produce lipopolysaccharides, which are a major contributing factor toward insulin resistance and inflammation due to the generation of oxidative stress and immunopathy. These all lead to DM and DFU. Probiotics are the commercial form of beneficial gut microbes that are taken as nutraceuticals by people of all ages to improve gut immunity and prevent gut dysbiosis. However, the role of probiotics has been less explored in the management of DFU. Hence, the therapeutic potential of probiotics in managing DFU is fully described in the current review. This report covers the linkage between gut dysbiosis and DFU, sources of probiotics, the mechanisms of probiotics in DW healing, and the impact of probiotic supplementation in treating DFU. In addition, techniques for the stabilization of probiotics, market status, and patents related to probiotics have been also covered. The relevant data were gathered from PubMed, Scopus, Taylor and Francis, Science Direct, and Google Scholar. Our systematic review discusses the utilization of probiotic supplementation as a nutraceutical for the management of DFU.

7.
Pharmaceutics ; 14(11)2022 Nov 06.
Artigo em Inglês | MEDLINE | ID: mdl-36365213

RESUMO

The study was initiated with two major purposes: investigating the role of isomalt (GIQ9) as a pharmaceutical carrier for solid self-nanoemulsifying drug delivery systems (S-SNEDDSs) and improving the oral bioavailability of lipophilic curcumin (CUN). GIQ9 has never been explored for solidification of liquid lipid-based nanoparticles such as a liquid isotropic mixture of a SNEDDS containing oil, surfactant and co-surfactant. The suitability of GIQ9 as a carrier was assessed by calculating the loading factor, flow and micromeritic properties. The S-SNEDDSs were prepared by surface adsorption technique. The formulation variables were optimized using central composite design (CCD). The optimized S-SNEDDS was evaluated for differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), microscopy, dissolution and pharmacokinetic studies. The S-SNEDDS showed a particle size, zeta potential and PDI of 97 nm, -26.8 mV and 0.354, respectively. The results of DSC, XRD, FTIR and microscopic studies revealed that the isotropic mixture was adsorbed onto the solid carrier. The L-SNEDDS and S-SNEDDS showed no significant difference in drug release, indicating no change upon solidification. The optimized S-SNEDDS showed 5.1-fold and 61.7-fold enhancement in dissolution rate and oral bioavailability as compared to the naïve curcumin. The overall outcomes of the study indicated the suitability of GIQ9 as a solid carrier for SNEDDSs.

8.
Pharm Res ; 39(11): 2817-2829, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-36195824

RESUMO

PURPOSE: The aim of current study is to formulate, optimize and characterize the developed formulation of Mesalamine-Curcumin Nanostructured Lipid Carriers (Mes-Cur NLCs). METHODS: It was formulated using high pressure homogenization followed by probe sonication and formulation variables were optimized using Central Composite Design. The particle size (PS), zeta potential (ZP), entrapment efficiency (EE), drug release, cytotoxicity on NIH 3T3 fibroblasts cells and HaCaT keratinocytes cells and efficacy on RAW264.7 cells for optimized formulation was determined. RESULTS: The PS, ZP and EE were found to be 85.26 nm, -23.7 ± 7.45 mV, 99.2 ± 2.62 % (Mes) and 84 ± 1.51 % (Cur), respectively. The good correlation between predicted and obtained value indicated suitability and reproducibility of experimental design. NLCs showed spherical shape as confirmed by TEM. In vitro drug release profile of prepared formulation showed that Mes exhibited 100 % release at 48 h, whereas Cur exhibited 82.23 ± 2.97% release at 120 h. Both the drugs exhibited sustained release upon incorporation into the NLCs. The absence of any significant cell death during MTT assay performed on NIH 3T3 fibroblasts cells and HaCaT keratinocytes cells indicated that NLCs' were safe for use. Furthermore, significant reduction in nitric oxide level during anti-inflammatory evaluation of formulation on RAW264.7 cells showed excellent potential for the formulation to treat inflammation. The formulation was found stable as no significant difference between the PS, ZP and EE of the fresh and aged NLCs was observed. CONCLUSION: The outcomes of study deciphered successful formulation of Mes-Cur NLCs.


Assuntos
Curcumina , Nanoestruturas , Curcumina/farmacologia , Portadores de Fármacos , Mesalamina , Lipídeos , Reprodutibilidade dos Testes , Tamanho da Partícula
9.
Cells ; 11(17)2022 08 28.
Artigo em Inglês | MEDLINE | ID: mdl-36078079

RESUMO

Diabetes mellitus is a severe metabolic disorder, which consistently requires medical care and self-management to restrict complications, such as obesity, kidney damage and cardiovascular diseases. The subtype gestational diabetes mellitus (GDM) occurs during pregnancy, which severely affects both the mother and the growing foetus. Obesity, uncontrolled weight gain and advanced gestational age are the prominent risk factors for GDM, which lead to high rate of perinatal mortality and morbidity. In-depth understanding of the molecular mechanism involved in GDM will help researchers to design drugs for the optimal management of the condition without affecting the mother and foetus. This review article is focused on the molecular mechanism involved in the pathophysiology of GDM and the probable biomarkers, which can be helpful for the early diagnosis of the condition. The early diagnosis of the metabolic disorder, most preferably in first trimester of pregnancy, will lead to its effective long-term management, reducing foetal developmental complications and mortality along with safety measures for the mother.


Assuntos
Diabetes Gestacional , Diabetes Gestacional/diagnóstico , Feminino , Humanos , Obesidade , Gravidez , Primeiro Trimestre da Gravidez , Fatores de Risco , Aumento de Peso
10.
Eur J Pharmacol ; 931: 175173, 2022 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-35940236

RESUMO

Advances in biotechnology have led to improving human health with number of novel approaches to mitigate life-threatening diseases such as human immunodeficiency virus (HIV) infection, cancer, and neurodegenerative diseases. In the case of HIV, the damage caused by the retrovirus to the immune system leads to opportunistic infection as well as an elevated risk of autoimmune disease and cancer. Furthermore, clinical symptoms associated with the virus itself may arise. Antiretroviral drug therapy using reverse transcriptase inhibitors, protease inhibitors, fusion inhibitor, chemokine receptor 5 antagonist and integrase strand transfer inhibitors have shown promising results in treating HIV infection and available in market in the form of various dosage forms. However, they are unable to completely cure the disease because of complexity in pathogenesis of HIV. In addition, these drugs have some limitations of poor solubility, permeability or, poor receptor binding capacity. To overcome these drawbacks, many novel drug delivery systems for the drugs belonging to above mentioned categories have been developed. The possibility of treating HIV infection using CRISPR-Cas9 gene editing has been found in 2015. This provided a new area of research to the scientists who are working towards alternative treatment strategies for HIV infections. The present article describes about various treatment strategies used to treat HIV infections with special emphasis on the role of CRISPR/Cas9 gene-based technology. The potential benefits of specific epigenetic modification in the c-c chemokine receptor 5 gene (CCR5) via various delivery methods are also highlighted.


Assuntos
Infecções por HIV , Sistemas CRISPR-Cas/genética , Edição de Genes/métodos , Terapia Genética/métodos , Infecções por HIV/tratamento farmacológico , Infecções por HIV/genética , Humanos , Receptores de Quimiocinas/genética
11.
Biomed Res Int ; 2022: 1659338, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35832856

RESUMO

Diabetic wound (DW) is a secondary application of uncontrolled diabetes and affects about 42.2% of diabetics. If the disease is left untreated/uncontrolled, then it may further lead to amputation of organs. In recent years, huge research has been done in the area of wound dressing to have a better maintenance of DW. These include gauze, films, foams or, hydrocolloid-based dressings as well as polysaccharide- and polymer-based dressings. In recent years, scaffolds have played major role as biomaterial for wound dressing due to its tissue regeneration properties as well as fluid absorption capacity. These are three-dimensional polymeric structures formed from polymers that help in tissue rejuvenation. These offer a large surface area to volume ratio to allow cell adhesion and exudate absorbing capacity and antibacterial properties. They also offer a better retention as well as sustained release of drugs that are directly impregnated to the scaffolds or the ones that are loaded in nanocarriers that are impregnated onto scaffolds. The present review comprehensively describes the pathogenesis of DW, various dressings that are used so far for DW, the limitation of currently used wound dressings, role of scaffolds in topical delivery of drugs, materials used for scaffold fabrication, and application of various polymer-based scaffolds for treating DW.


Assuntos
Diabetes Mellitus , Pé Diabético , Amputação Cirúrgica , Curativos Hidrocoloides , Diabetes Mellitus/terapia , Pé Diabético/terapia , Humanos , Polímeros/uso terapêutico , Cicatrização
12.
Int J Pharm ; 624: 121882, 2022 Aug 25.
Artigo em Inglês | MEDLINE | ID: mdl-35671853

RESUMO

Non-aqueous nanoemulsion (NANE) of Alpinia galanga extract (AGE) was prepared using Palmester 3595 (MCT oil) as oil phase, Cremophor RH 40-Transcutol P® as surfactant-co-surfactant (Smix), and glycerin as non-aqueous polar continuous phase. The composition was optimized by applying three-level, four factor Box-Behnken design (BBD). The mean droplet size and zeta potential of the optimized AGE NANE was found to be 60.81 ± 18.88 nm and -7.99 ± 4.14 mV, respectively. The ex vivo permeation studies of AGE NANE and AGE per se on porcine skin reported flux of 125.58 ± 8.36 µg/cm2 h-1 and 12.02 ± 1.64 µg/cm2 h-1, respectively. Therefore, the enhancement ratio has shown 10-folds increase in the flux for AGE NANE when compared to extract per se. Later, confocal laser scanning microcopy confirmed that AGE NANE were able to penetrate into skin's stratum by trans-follicular transport mechanism. The stability studies of AGE NANE confirmed its stability at 30 ± 2 °C/75 ± 5 % RH and 5 ± 3 °C. The efficacy of AGE NANE was evaluated in vivo on imiquimod (IMQ) induced mouse model. The mice treated with low and high doses of AGE NANE (groups VI and VII) showed significant (p < 0.05) amelioration of psoriasis. Results of histopathology indicated reduction in psoriasis area severity index in AGE NANE treated mice (group VI and group VII).


Assuntos
Alpinia , Nanopartículas , Psoríase , Administração Cutânea , Animais , Emulsões , Camundongos , Psoríase/tratamento farmacológico , Absorção Cutânea , Tensoativos , Suínos
13.
Environ Sci Pollut Res Int ; 29(34): 51976-51988, 2022 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-35254621

RESUMO

Type 2 diabetes mellitus is one of the most common and life-threatening diseases found across the globe. It occurs due to insulin resistance (IR). Major causes of IR include obesity, sedentary life style and hyperlipidemia. Glimepiride (GLM) is one of the most common oral sulphonyl ureas that is being used to treat diabetes and Simvastatin (SIM) is one of the most common statins that is used to treat hyperlipidaemia. However, both the drugs suffer from dissolution rate limited oral bioavailability. Hence, the aim of present study was to develop two different nanoformulations viz. nanosuspension and self-nanoemulsifying drug delivery systems (SNEDDS) and evaluate their potential in treating type 2 diabetes mellitus on streptozotocin (STZ) induced rats. In the present study two such drugs, GLM and SIM were co-formulated into nanosuspension (NS) as well as self-nanoemulsifying drug delivery systems (L-SNEDDS). Both formulations were spray dried for solidification and evaluated for their antidiabetic potential against high fat diet and streptozotocin induced rat model. The study showed significant (p < 0.05) decrease in lipid/cholesterol and blood glucose levels and significant increase in antioxidant levels in the rats treated with NS and SNEDDS containing the drugs alone as well as their combination as compared to their unprocessed forms. However, the efficacy was more prominent in case of combination possibly due to dual benefits i.e., decrease in IR due to statin and control of blood glucose level. Among NS and SNEDDS, NS was found more efficacious than that of the SNEDDS possibly due to higher enhancement of oral bioavailability in case of NS.


Assuntos
Diabetes Mellitus Tipo 2 , Nanopartículas , Administração Oral , Animais , Disponibilidade Biológica , Glicemia , Liberação Controlada de Fármacos , Emulsões , Tamanho da Partícula , Ratos , Sinvastatina , Solubilidade , Estreptozocina , Compostos de Sulfonilureia
14.
Crit Rev Food Sci Nutr ; 62(26): 7370-7394, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-33951968

RESUMO

Capsiate is a non-pungent analogue of capsaicin. It belongs to the family of capsinoids which are esters of vanillyl alcohol with fatty acids while capsaicin belongs to the family of capsaicinoids that are amides of vanillylamine with a variety of branched-chain fatty acids. While capsaicin is extensively reported for plethora of pharmacological actions, capsiate remains much less explored. Extracted from various species of Capsicum plant, the molecule has also been chemically synthesized via a number of synthetic and enzymatic routes. Based on its action on transient receptor potential vanilloid subfamily member 1 receptors, recent research has focused on its potential roles in treatment of obesity, metabolic disorders, cancer, cardiovascular disorders and gastro-intestinal disorders. Its toxicity profile has been reported to be much safe. The molecule, however, faces the challenge of low aqueous solubility and stability. It has been commercialized for its use as a weight loss supplement. However, the therapeutic potential of the compound which is much beyond boosting metabolism remains unexplored hitherto. This comprehensive review summarizes the studies demonstrating the therapeutic potential of capsiate in various pathological conditions. Discussed also are potential future directions for formulation strategies to develop efficient, safe and cost-effective dosage forms of capsiate to explore its role in various disease conditions. The databases investigated include Cochrane library, Medline, Embase, Pubmed and in-house databases. The search terms were "capsiate," "capsinoids," "thermogenesis," and their combinations. The articles were screened for relevance by going through their abstract. All the articles pertaining to physicochemical, physiological, pharmacological and therapeutic effects of capsiate have been included in the manuscript.


Assuntos
Capsaicina , Capsicum , Capsaicina/análogos & derivados , Capsaicina/farmacologia , Capsicum/química , Humanos , Termogênese , Redução de Peso
15.
Int J Pharm ; 612: 121306, 2022 Jan 25.
Artigo em Inglês | MEDLINE | ID: mdl-34813906

RESUMO

Liquid self-nanoemulsifying drug delivery system (L-SNEDDS) of curcumin and quercetin were prepared by dissolving them in isotropic mixture of Labrafil M1944CS®, Capmul MCM®, Tween-80® and Transcutol P®. The prepared L-SNEDDS were solidified using Ganoderma lucidum extract, probiotics and Aerosil-200® using spray drying. These were further converted into pellets using extrusion-spheronization. The mean droplet size and zeta potential of L-SNEDDS were found to be 63.46 ± 2.12 nm and - 14.8 ± 3.11 mV while for solid SNEDDS pellets, these were 72.46 ± 2.16 nm and -38.7 ± 1.34 mV, respectively. The dissolution rate for curcumin and quercetin each was enhanced by 4.5 folds while permeability was enhanced by 5.28 folds (curcumin) and 3.35 folds (quercetin) when loaded into SNEDDS pellets. The Cmax for curcumin and quercetin containing SNEDDS pellets was found 532.34 ± 5.64 ng/mL and 4280 ± 65.67 ng/mL, respectively. This was 17.55 and 3.48 folds higher as compared to their naïve forms. About 50.23- and 5.57-folds increase in bioavailability was observed for curcumin and quercetin respectively, upon loading into SNEDDS pellets. SNEDDS pellets were found stable at accelerated storage conditions. The developed formulation was able to normalize the levels of blood glucose, lipids, antioxidant biomarkers, and tissue architecture of pancreas and liver in streptozotocin induced diabetic rats as compared to their naïve forms.


Assuntos
Curcumina , Diabetes Mellitus Experimental , Diabetes Mellitus Tipo 2 , Nanopartículas , Probióticos , Reishi , Administração Oral , Animais , Disponibilidade Biológica , Diabetes Mellitus Experimental/tratamento farmacológico , Sistemas de Liberação de Medicamentos , Emulsões , Tamanho da Partícula , Pós/uso terapêutico , Quercetina/uso terapêutico , Ratos , Solubilidade , Estreptozocina
16.
Environ Sci Pollut Res Int ; 28(42): 59608-59629, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34515931

RESUMO

Medical devices, being life-saving tools, are considered to be a boon for healthcare system. However, in addition to their therapeutic effects, there are several ill consequences that are caused by these devices. An effective cohort vigilant system was needed to manage such adverse effects. This had led to the introduction of materiovigilance. Materiovigilance is the study and follow-up of occurrences that arise as a result from the usage of the medical equipment. It not only manages adverse events (AE) but also creates harmonization among countries. Keeping these objectives in focus, the principles, perspectives, and practices with regard to materiovigilance that are followed in the USA, Europe, China, Japan, Australia, Canada, and India are being compared. Such a comparison is essential, which will help us to understand the gaps in the current regulatory systems in the above-mentioned countries and furthermore will provide a comprehensive picture to the regulatory authorities to amend any existing laws if required. These amendments may ensure optimal patient safety by providing them a benign experience from the use of medical devices.


Assuntos
Atenção à Saúde , Regulamentação Governamental , Austrália , Canadá , China , Europa (Continente) , Humanos , Índia , Japão , Estados Unidos
17.
Med Hypotheses ; 156: 110679, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34555619

RESUMO

Colon cancer is characterised by the persistent change in bowel habits due to the formation of polyps (cancerous) in the inner lining of the colon. Clinically, there are several anticancer drugs available to treat colon cancer. Oxaliplatin (third generation platinum drug) is widely prescribed anticancer drug due to its broad range anticancer properties and low toxicities over cisplatin and carboplatin. Currently, use of oxaliplatin as adjuvant chemotherapy represents a standard care for the treatment of advanced colon cancer. Despite this, its rapid degradation in systemic circulations upon administration, lack of tumor specificity, and low bioavailability limits its anticancer potential. On the other hand, vanillic acid (VA) has shown anticancer potential in colon cancer by targeting mTOR/Ras pathway, HIF-1α inhibition, NF-ĸB, and Nrf2 that regulate cell growth, cell survival, proliferation and adaptation to cancer microenvironment. Normal oral delivery of these two drugs offers non-specific drug release in gastrointestinal tract that leads to unwanted toxicity and very less amount of drug become available for colonic site. Therefore, loading of these two drugs in polysaccharide based functionalized polymeric micelles (FPMs) can offer selective targeting at colonic site and could offer better therapeutic efficacy at much lesser doses of drugs. Therefore, a new hypothesis has been proposed that the combination of vanillic acid with oxaliplatin co-loaded in FPMs could provide colon targeting ability with enhanced potency and safety profile by targeting multiple pathways than current adjuvant chemotherapies available in the market for the treatment of colon cancer.


Assuntos
Antineoplásicos , Neoplasias do Colo , Antineoplásicos/uso terapêutico , Linhagem Celular Tumoral , Neoplasias do Colo/tratamento farmacológico , Humanos , Micelas , Oxaliplatina/uso terapêutico , Polissacarídeos , Microambiente Tumoral , Ácido Vanílico/uso terapêutico
18.
J Ethnopharmacol ; 275: 114115, 2021 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-33852947

RESUMO

ETHNOPHARMACOLOGICAL RELEVANCE: Elaeagnus conferta Roxb. (Elaeagnaceae) is a subtropical shrub mainly native to India, Vietnam, Malaysia and South China, whose various parts are used for treatment of diabetes, gastric ulcers, pain, oxidative stress and pulmonary disorders. Though the other parts of the plant have been reported for their ethnic use i.e. fruits as astringent locally and for cancer systemically, leaves for body pain and flowers for pain in chest and the seeds are mentioned as edible, there is no report per se on the medicinal use of seeds. Based on the fact that seeds of closely resembling species i.e. Elaeagnus rhamnoides has demonstrated significant anti-gastroulcerative property, the probability of the seeds of E. conferta possessing similar activity seemed quite significant. AIM OF THE STUDY: Phytochemical investigation and assessment of pharmacological mechanism(s) involved in anti-ulcer effect of methanolic extract of the seeds of E. conferta. MATERIALS AND METHODS: Bioactive phytoconstituents were isolated by column chromatography. These were identified by spectroscopic techniques including infrared (IR) spectroscopy, nuclear magnetic resonance (NMR) and mass spectrometry. Methanolic extract (MEC) of the seeds was prepared by cold maceration and its anti-ulcerogenic potential was evaluated using indomethacin (50 mg/kg) and water immersion stress models in male rats. The animals were pre-treated with different doses of MEC (400 and 800 mg/kg) and the therapeutic effect was compared with standard drug i.e. ranitidine (RANT; 50 mg/kg). The ameliorative effects of MEC were investigated on gastric juice pH, total acidity, free acidity and ulcer index. The assays of malionaldehyde (MDA), catalase (CAT), superoxide dismutase (SOD), glutathione (GSH) and pro-inflammatory cytokines i.e. interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α) were carried out to find out the possible mechanism(s) of protection. Further, histopathological changes were also studied. RESULTS: Chromatography studies and further confirmation by spectroscopic techniques revealed the presence of four different compounds in MEC i.e oleic acid (1), stearic acid (2), ascorbic acid (3) and quercetin (4). MEC exhibited anti-ulcerogenic effect in dose dependent manner which may be attributed to suppression of pro-inflammatory cytokines (IL-6, TNF-α) and MDA (112.7%), and up-regulation of protective factors such as CAT (90.48%), SOD (92.77%) and GSH (90.01%). Ulcer inhibition, reduction in total and free acidity and increase in gastric juice pH were observed in MEC treated rats as compared to disease control animals. Histopathological findings confirmed decreased cell infiltration, less epithelial cell damage and regeneration of gastric mucosa in dose dependent manner. CONCLUSIONS: The anti-ulcer effect of MEC may be attributed to its ability to scavenge free radicals and anti-inflammatory property via suppression of TNF-α and IL-6, thus offers a complete and holistic approach for management of peptic ulcer.


Assuntos
Antiulcerosos/farmacologia , Elaeagnaceae/química , Extratos Vegetais/farmacologia , Sementes/química , Úlcera Gástrica/prevenção & controle , Animais , Antiulcerosos/química , Antiulcerosos/uso terapêutico , Antiulcerosos/toxicidade , Peso Corporal/efeitos dos fármacos , Catalase/metabolismo , Mucosa Gástrica/patologia , Glutationa/metabolismo , Concentração de Íons de Hidrogênio/efeitos dos fármacos , Indometacina/toxicidade , Interleucina-6/metabolismo , Peroxidação de Lipídeos/efeitos dos fármacos , Masculino , Malondialdeído/metabolismo , Metanol/química , Tamanho do Órgão/efeitos dos fármacos , Extratos Vegetais/química , Extratos Vegetais/uso terapêutico , Extratos Vegetais/toxicidade , Ranitidina/farmacologia , Ranitidina/uso terapêutico , Ratos Wistar , Restrição Física/efeitos adversos , Soro/química , Úlcera Gástrica/etiologia , Úlcera Gástrica/patologia , Superóxido Dismutase/metabolismo , Fator de Necrose Tumoral alfa/metabolismo
19.
Sci Rep ; 11(1): 3998, 2021 Feb 17.
Artigo em Inglês | MEDLINE | ID: mdl-33597558

RESUMO

We present Python Statistical Analysis of Turbulence (P-SAT), a lightweight, Python framework that can automate the process of parsing, filtering, computation of various turbulent statistics, spectra computation for steady flows. P-SAT framework is capable to work with single as well as on batch inputs. The framework quickly filters the raw velocity data using various methods like velocity correlation, signal-to-noise ratio (SNR), and acceleration thresholding method in order to de-spike the velocity signal of steady flows. It is flexible enough to provide default threshold values in methods like correlation, SNR, acceleration thresholding and also provide the end user with an option to provide a user defined value. The framework generates a .csv file at the end of the execution, which contains various turbulent parameters mentioned earlier. The P-SAT framework can handle velocity time series of steady flows as well as unsteady flows. The P-SAT framework is capable to obtain mean velocities from instantaneous velocities of unsteady flows by using Fourier-component based averaging method. Since P-SAT framework is developed using Python, it can be deployed and executed across the widely used operating systems. The GitHub link for the P-SAT framework is: https://github.com/mayank265/flume.git .

20.
Neurol Sci ; 42(5): 1785-1797, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-32885394

RESUMO

The present investigation is focused on improving oral bioavailability of poorly soluble and lipophilic drugs, curcumin (CRM) and duloxetine (DXH), through the solid self-nanoemulsifying drug delivery system (S-SNEDDS) and identifying their potential against attenuation of NP in chronic constriction injury (CCI)-induced rats through the solid self-nanoemulsifying drug delivery system (S-SNEDDS). The optimized batch of S-SNEDDS reported was containing CRM and DXH (30 mg each), castor oil (20% w/w), tween-80 (40% w/w), transcutol-P (40% w/w), and syloid 244 FP (1 g). The high dose of each of naïve CRM (NCH), naïve DXH (NDH), physical mixture of DXH and CRM (C-NCM-DXH), S-SNEDDS-CRM (SCH), S-SNEDDS-DXH (SDH), and S-SNEDDS-CRM-DXH (C-SCH-SDH) was subjected for MTT assay. The developed formulations were subjected to pharmacokinetic studies and results showed about 8 to 11.06 and 2-fold improvement in oral bioavailability of CRM and DXH through S-SNEDDS. Furthermore, CCI-induced male Wistar rats were treated with SSNEDDS containing CRM and DXH, S-SNEDDS containing individual drug, individual naïve forms, and their combination from the day of surgery for 14 days and evaluated for behavioral at pre-determined time intervals. On the terminal day, animals were sacrificed to assess tissue myeloperoxidase, superoxide anion, protein, tumor necrosis factor-α, total calcium levels, and histopathological changes. Pronounced effect was observed in rats treated with S-SNEDDS containing both drugs with respect to rats receiving any of other treatments owing to enhanced oral bioavailability through S-SNEDDS. Therefore, it can be concluded that S-SNEDDS of both drugs and their coadministration can accelerate the prevention of NP.


Assuntos
Curcumina , Neuralgia , Administração Oral , Animais , Sistemas de Liberação de Medicamentos , Cloridrato de Duloxetina , Emulsões , Masculino , Neuralgia/tratamento farmacológico , Tamanho da Partícula , Ratos , Ratos Wistar , Solubilidade
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA