Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 75
Filtrar
1.
J Biochem Mol Toxicol ; 38(4): e23679, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38486411

RESUMO

Normoxic inactivation of prolyl hydroxylase-2 (PHD-2) in tumour microenvironment paves the way for cancer cells to thrive under the influence of HIF-1α and NF-κB. Henceforth, the present study is aimed to identify small molecule activators of PHD-2. A virtual screening was conducted on a library consisting of 265,242 chemical compounds, with the objective of identifying molecules that exhibit structural similarities to the furan chalcone scaffold. Further, PHD-2 activation potential of screened compound was determined using in vitro 2-oxoglutarate assay. The cytotoxic activity and apoptotic potential of screened compound was determined using various staining techniques, including 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide, 4',6-diamidino-2-phenylindole (DAPI), 1,1',3,3'-tetraethylbenzimi-dazolylcarbocyanine iodide (JC-1), and acridine orange/ethidium bromide (AO/EB), against MCF-7 cells. 7,12-Dimethylbenz[a]anthracene (DMBA) model of mammary gland cancer was used to study the in vivo antineoplastic efficacy of screened compound. [(E)-1-(4-fluorophenyl)-3-(furan-2-yl) prop-2-en-1-one] (BBAP-7) was screened and validated as a PHD-2 activator by an in vitro 2-oxo-glutarate assay. The IC50 of BBAP-7 on MCF-7 cells is 18.84 µM. AO/EB and DAPI staining showed nuclear fragmentation, blebbing and condensation in MCF-7 cells following BBAP-7 treatment. The red-to-green intensity ratio of JC-1 stained MCF-7 cells decreased after BBAP-7 treatment, indicating mitochondrial-mediated apoptosis. DMBA caused mammary gland dysplasia, duct hyperplasia and ductal carcinoma in situ. Carmine staining, histopathology, and scanning electron microscopy demonstrated that BBAP-7, alone or with tirapazamine, restored mammary gland surface morphology and structural integrity. Additionally, BBAP-7 therapy significantly reduced oxidative stress and glycolysis. The findings reveal that BBAP-7 activates PHD-2, making it a promising anticancer drug.


Assuntos
Antineoplásicos , Benzimidazóis , Carbocianinas , Carcinoma , Chalcona , Chalconas , Humanos , Prolil Hidroxilases , Chalconas/farmacologia , Antineoplásicos/farmacologia , Laranja de Acridina , Apoptose , Microambiente Tumoral
2.
Pharmacol Ther ; 250: 108519, 2023 10.
Artigo em Inglês | MEDLINE | ID: mdl-37625521

RESUMO

Lactate acidosis is often observed in the tumor microenvironment (TME) of solid tumors. This is because glucose breaks down quickly via glycolysis, causing lactate acidity. Lactate is harmful to healthy cells, but is a major oncometabolite for solid cancer cells that do not receive sufficient oxygen. As an oncometabolite, it helps tumor cells perform different functions, which helps solid hypoxic tumor cells spread to other parts of the body. Studies have shown that the acidic TME contains VEGF, Matrix metalloproteinases (MMPs), cathepsins, and transforming growth factor-ß (TGF-ß), all of which help spread in direct and indirect ways. Although each cytokine is important in its own manner in the TME, TGF-ß has received much attention for its role in metastatic transformation. Several studies have shown that lactate acidosis can cause TGF-ß expression in solid hypoxic cancers. TGF-ß has also been reported to increase the production of fatty acids, making cells more resistant to treatment. TGF-ß has also been shown to control the expression of VEGF and MMPs, which helps solid hypoxic tumors become more aggressive by helping them spread and create new blood vessels through an unknown process. The role of TGF-ß under physiological conditions has been described previously. In this study, we examined the role of TGF-ß, which is induced by lactate acidosis, in the spread of solid hypoxic cancer cells. We also found that TGF-ß and lactate work together to boost fatty acid production, which helps angiogenesis and invasiveness.


Assuntos
Acidose , Neoplasias , Humanos , Fator de Crescimento Transformador beta/metabolismo , Fator A de Crescimento do Endotélio Vascular/metabolismo , Ácido Láctico/metabolismo , Microambiente Tumoral , Hipóxia
3.
Environ Sustain (Singap) ; : 1-4, 2023 May 29.
Artigo em Inglês | MEDLINE | ID: mdl-37363087

RESUMO

The SARS-CoV-2 virus is primarily transmitted through direct or indirect contact with the mucous membranes of the mouth and nostrils. The presence of SARS-CoV-2 in sputum with a high viral load suggested that maintaining good oral hygiene could be critical in limiting COVID-19 disease. Brushing the teeth frequently and regularly with widely available amphiphilic detergent, sodium lauryl sulfate (SLS)-based toothpastes could help in preventing the spread of SARS-CoV-2. We proposed a community survey-based methodology followed by an in vitro biochemical strategy to test the virucidal potentiality of SLS, an amphiphilic detergent found in these toothpastes. Through biomolecular structure and docking analysis using models of spike protein and SLS, we showed a possible molecular mechanism of action for SLS-enabled viral particle inactivation.

4.
Front Pharmacol ; 14: 1108915, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36891273

RESUMO

Hypoxia is caused by a cancer-promoting milieu characterized by persistent inflammation. NF-κB and HIF-1α are critical participants in this transition. Tumor development and maintenance are aided by NF-κB, while cellular proliferation and adaptability to angiogenic signals are aided by HIF-1α. Prolyl hydroxylase-2 (PHD-2) has been hypothesized to be the key oxygen-dependent regulator of HIF-1α and NF-transcriptional B's activity. Without low oxygen levels, HIF-1α is degraded by the proteasome in a process dependent on oxygen and 2-oxoglutarate. As opposed to the normal NF-κB activation route, where NF-κB is deactivated by PHD-2-mediated hydroxylation of IKK, this method actually activates NF-κB. HIF-1α is protected from degradation by proteasomes in hypoxic cells, where it then activates transcription factors involved in cellular metastasis and angiogenesis. The Pasteur phenomenon causes lactate to build up inside the hypoxic cells. As part of a process known as lactate shuttle, MCT-1 and MCT-4 cells help deliver lactate from the blood to neighboring, non-hypoxic tumour cells. Non-hypoxic tumour cells use lactate, which is converted to pyruvate, as fuel for oxidative phosphorylation. OXOPHOS cancer cells are characterized by a metabolic switch from glucose-facilitated oxidative phosphorylation to lactate-facilitated oxidative phosphorylation. Although PHD-2 was found in OXOPHOS cells. There is no clear explanation for the presence of NF-kappa B activity. The accumulation of the competitive inhibitor of 2-oxo-glutarate, pyruvate, in non-hypoxic tumour cells is well established. So, we conclude that PHD-2 is inactive in non-hypoxic tumour cells due to pyruvate-mediated competitive suppression of 2-oxo-glutarate. This results in canonical activation of NF-κB. In non-hypoxic tumour cells, 2-oxoglutarate serves as a limiting factor, rendering PHD-2 inactive. However, FIH prevents HIF-1α from engaging in its transcriptional actions. Using the existing scientific literature, we conclude in this study that NF-κB is the major regulator of tumour cell growth and proliferation via pyruvate-mediated competitive inhibition of PHD-2.

5.
Front Oncol ; 13: 1034205, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36761981

RESUMO

It is well known that solid hypoxic tumour cells oxidise glucose through glycolysis, and the end product of this pathway is fermented into lactate which accumulates in the tumour microenvironment (TME). Initially, it was proclaimed that cancer cells cannot use lactate; therefore, they dump it into the TME and subsequently augment the acidity of the tumour milieu. Furthermore, the TME acts as a lactate sink with stope variable amount of lactate in different pathophysiological condition. Regardless of the amount of lactate pumped out within TME, it disappears immediately which still remains an unresolved puzzle. Recent findings have paved pathway in exploring the main role of lactate acidosis in TME. Cancer cells utilise lactate in the de novo fatty acid synthesis pathway to initiate angiogenesis and invasiveness, and lactate also plays a crucial role in the suppression of immunity. Furthermore, lactate re-programme the lipid biosynthetic pathway to develop a metabolic symbiosis in normoxic, moderately hypoxic and severely hypoxic cancer cells. For instance: severely hypoxic cancer cells enable to synthesizing poly unsaturated fatty acids (PUFA) in oxygen scarcity secretes excess of lactate in TME. Lactate from TME is taken up by the normoxic cancer cells whereas it is converted back to PUFAs after a sequence of reactions and then liberated in the TME to be utilized in the severely hypoxic cancer cells. Although much is known about the role of lactate in these biological processes, the exact molecular pathways that are involved remain unclear. This review attempts to understand the molecular pathways exploited by lactate to initiate angiogenesis, invasiveness, suppression of immunity and cause re-programming of lipid synthesis. This review will help the researchers to develop proper understanding of lactate associated bimodal regulations of TME.

8.
Oxid Med Cell Longev ; 2022: 2407223, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35592530

RESUMO

Hypoxia-inducible factor-1alpha (HIF-1α) is a major transcription factor that adapts to low oxygen homeostasis and regulates the expression of several hypoxic genes, which aid in cancer survival and development. It has recently piqued the interest of translational researchers in the disciplines of cancer sciences. Hypoxia triggers an ample adaptive mechanism mediated via the HIF-1α transcriptional domain. Anaerobic glycolysis, angiogenesis, metastasis, and mitophagy are adaptive mechanisms that support tumor survival by promoting oxygen supply and regulating oxygen demand in hypoxic tumor cells. Throughout this pathway, the factor-inhibiting HIF-1α is a negative regulator of HIF-1α leading to its hydroxylation at the C-TAD domain of HIF-1α under normoxia. Thus, hydroxylated HIF-1α is unable to proceed with the transcriptional events due to interference in binding of C-TAD and CBP/p300. From this review, we can hypothesize that remodeling of FIH-1 activity is a unique mechanism that decreases the transcriptional activity of HIF-1α and, as a result, all of its hypoxic consequences. Hence, this review manuscript details the depth of knowledge of FIH-1 on hypoxia-associated cellular and molecular events, a potential strategy for targeting hypoxia-induced malignancies.


Assuntos
Neoplasias , Proteínas Repressoras , Humanos , Hipóxia/metabolismo , Subunidade alfa do Fator 1 Induzível por Hipóxia/genética , Subunidade alfa do Fator 1 Induzível por Hipóxia/metabolismo , Oxigenases de Função Mista/genética , Oxigenases de Função Mista/metabolismo , Neoplasias/genética , Oxigênio/metabolismo , Proteínas Repressoras/metabolismo , Ativação Transcricional/genética
10.
Front Cell Dev Biol ; 9: 736910, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34869321

RESUMO

The current study investigated the role of combination therapy with voacamine and vincristine in preventing mammary gland carcinoma through prolyl hydroxylase-2 activation. Prolyl hydroxylase-2 activation leads to the downregulation of hypoxia-inducible factor-1α and fatty acid synthase. Overexpression of hypoxia-inducible factor-1α and fatty acid synthase has been previously reported in solid tumors of the mammary gland. After screening a battery of natural compounds similar to vincristine, voacamine was selected as a possible prolyl hydroxylase-2 activator, and its activity was evaluated using a 7,12-dimethylbenz[a]anthracene-induced rat model. The combination therapy was evaluated for cardiac toxicity using a hemodynamic profile. Angiogenic markers were evaluated by carmine staining. Monotherapy and combination therapy were also evaluated for liver and kidney toxicity using hematoxylin and eosin staining. The antioxidant potential was delineated using oxidative stress markers. The serum metabolomic profile was studied using NMR spectroscopy, and the disruption of fatty acids was evaluated using gas chromatography. Western blotting of proteins involved in hypoxic pathways was performed to decipher the action of therapy at the molecular level. Immunoblotting analysis validated that combination therapy has potential toss with prolyl hydroxylase-2 activity and thus initiates proteolytic degradation of hypoxia-inducible factor-1α and its consequent effects. Combination therapy also stimulated programmed cell death (apoptosis) in rapidly dividing cancer cells. The present study explored the role of voacamine inactivation of prolyl hydroxylase-2, which can decrease the overexpression of hypoxia-inducible factor-1α and fatty acid synthase in mammary gland carcinoma cells.

11.
Front Immunol ; 12: 660632, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34305892

RESUMO

The novel SARS-CoV-2virus that caused the disease COVID-19 is currently a pandemic worldwide. The virus requires an alveolar type-2 pneumocyte in the host to initiate its life cycle. The viral S1 spike protein helps in the attachment of the virus on toACE-2 receptors present on type-2 pneumocytes, and the S2 spike protein helps in the fusion of the viral membrane with the host membrane. Fusion of the SARS-CoV-2virus and host membrane is followed by entry of viral RNA into the host cells which is directly translated into the replicase-transcriptase complex (RTC) following viral RNA and structural protein syntheses. As the virus replicates within type-2 pneumocytes, the host immune system is activated and alveolar macrophages start secreting cytokines and chemokines, acting as an inflammatory mediator, and chemotactic neutrophils, monocytes, natural NK cells, and CD8+ T cells initiate the local phagocytosis of infected cells. It is not the virus that kills COVID-19 patients; instead, the aberrant host immune response kills them. Modifying the response from the host immune system could reduce the high mortality due to SARS-CoV-2 infection. The present study examines the viral life cycle intype-2 pneumocytes and resultant host immune response along with possible therapeutic targets.


Assuntos
COVID-19/imunologia , COVID-19/terapia , Imunomodulação , SARS-CoV-2/patogenicidade , Células Epiteliais Alveolares/metabolismo , Células Epiteliais Alveolares/patologia , Células Epiteliais Alveolares/virologia , Enzima de Conversão de Angiotensina 2/metabolismo , COVID-19/patologia , COVID-19/virologia , Citocinas/imunologia , Citocinas/metabolismo , Interações Hospedeiro-Patógeno/imunologia , Humanos , Imunidade , Macrófagos Alveolares/imunologia , Macrófagos Alveolares/metabolismo , SARS-CoV-2/fisiologia
12.
BMC Mol Cell Biol ; 22(1): 33, 2021 Jun 05.
Artigo em Inglês | MEDLINE | ID: mdl-34090331

RESUMO

BACKGROUND: In the present study, fatty acid synthesis is targeted to combat mammary gland carcinoma by activating prolyl hydroxylase-2 with Voacamine alone and in combination with Tamoxifen. It was hypothesized that the activation of prolyl hydroxylase-2 would inhibit the hypoxia-induced fatty acid synthesis and mammary gland carcinoma. Mammary gland carcinoma was induced with a single dose administration of N-methyl-N-nitrosourea (50 mg/kg,i.p.) and treatment with Voacamine and Tamoxifen 15 days after carcinogen administration. RESULTS: At the end of the study, hemodynamic profiling of animals was recorded to assess the cardiotoxic potential of the drug. Blood serum was separated and subjected to nuclear magnetic resonance spectroscopy. Carmine staining and histopathology of mammary gland tissue were performed to evaluate the anti-angiogenic potential of the drug. The antioxidant potential of the drug was measured with antioxidant markers. Western blotting was performed to study the effect of the drug at the molecular level. CONCLUSION: Results of the study have shown that Voacamine treatment stopped further decrease in body weight of experimental animals. The hemodynamic study evidenced that Voacamine at a low dose is safe in cardiac patients. Microscopic evaluation of mammary gland tissue documented the anti-angiogenic potential of Voacamine and Tamoxifen therapy. Perturbed serum metabolites were also restored to normal along with antioxidant markers. Immunoblotting of mammary gland tissue also depicted restoration of proteins of the hypoxic and fatty acid pathway. Conclusively, Voacamine and its combination with Tamoxifen activated prolyl hydroxylase-2 to combat mammary gland carcinoma.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma/tratamento farmacológico , Prolina Dioxigenases do Fator Induzível por Hipóxia/metabolismo , Ibogaína/análogos & derivados , Neoplasias Mamárias Experimentais/tratamento farmacológico , Animais , Antioxidantes/metabolismo , Peso Corporal/efeitos dos fármacos , Carcinoma/induzido quimicamente , Carcinoma/metabolismo , Carcinoma/patologia , Simulação por Computador , Eletrocardiografia , Ácidos Graxos/biossíntese , Feminino , Frequência Cardíaca/efeitos dos fármacos , Ibogaína/química , Ibogaína/farmacocinética , Ibogaína/uso terapêutico , Glândulas Mamárias Animais/patologia , Neoplasias Mamárias Experimentais/induzido quimicamente , Neoplasias Mamárias Experimentais/metabolismo , Neoplasias Mamárias Experimentais/patologia , Metaboloma , Metilnitrosoureia , Neovascularização Patológica/tratamento farmacológico , Ratos Wistar , Tamoxifeno/uso terapêutico
13.
Chemosphere ; 261: 127689, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-32736242

RESUMO

Distillery wastewater has significant amount of coloring compounds and organic substances even after the secondary treatment process, which poses many severe environmental and health threats. However, the recalcitrant coloured compounds have not yet been clearly identified. In this study, two bacterial strains DS3 and DS5 capable to decolorize distillery wastewater (DWW) pollutants were isolated and characterized as Staphylococcus saprophyticus (MF182113) and Alcaligenaceae sp. (MF182114), respectively. Results showed that mixed bacterial culture was found more effective decolorizing 71.83% DWW compared to axenic culture DS3 and DS5 resulting only 47.94% and 50.67% decolorization, respectively. The FT-IR and LC-MS/MS analysis of untreated DWW showed the presence of many recalcitrant compounds having different functional groups, but after bacterial treatment, most of compounds get diminished and the toxicity of DWW was reduced significantly. Further, the Nile red staining of Caenorhabditis elegans exposed to untreated and bacteria treated DWW for evaluation of toxicity assay and results revealed that the worms exposed to untreated DWW showed sharp reduction in total fat content having more profound effects, suggesting the diminished nAchR signaling as compare to bacterial treated DWW. Hence, this study revealed that inadequate disposal of untreated DWW may cause transfer of toxic substances into the environment and receiving water bodies.


Assuntos
Biodegradação Ambiental , Eliminação de Resíduos Líquidos/métodos , Animais , Bactérias/metabolismo , Caenorhabditis elegans/metabolismo , Cromatografia Líquida , Cor , Poluentes Ambientais/análise , Resíduos Industriais/análise , Espectroscopia de Infravermelho com Transformada de Fourier , Espectrometria de Massas em Tandem , Águas Residuárias/análise , Poluentes Químicos da Água/análise
14.
3 Biotech ; 10(8): 338, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32670738

RESUMO

The current study focuses on the evaluation of the chemoprophylactic activity of nitazoxanide against the mammary gland carcinoma in experimental rats. The experimental protocol involves total 50 female Wistar albino rats of body weight 120-150 g, which were randomly categorized into five groups; Normal control (1% w/v carboxymethyl cellulose, p.o.); Toxic control (N-methyl-N-nitrosourea, MNU, 47 mg/kg i.v.); Standard (MNU, 47 mg/kg i.v. + tamoxifen, 1 mg/kg p.o.); Treatment 1 (MNU, 47 mg/kg i.v. + NTZ low-dose, 25 mg/kg p.o.); and Treatment 2 (MNU, 47 mg/kg, i.v. + NTZ high-dose, 50 mg/kg p.o.). The mammary gland carcinoma was induced by a single tail vein intravenous injection of MNU at a 47 mg/kg dose. Seven days after MNU administration, daily dosing of nitazoxanide and tamoxifen was initiated till 110th day in respective groups. The MNU toxicity was apparent with the altered electrocardiogram and heart rate variability, increased number of alveolar bud count, differentiation score, and upregulated antioxidant parameters. Nitazoxanide treatment restored the histological architecture in rats along with the reduction of alveolar buds and downregulation of oxidative stress markers as well as inflammatory markers. Therefore, nitazoxanide can be utilized as a potential chemoprophylactic agent against mammary gland carcinoma induced by MNU.

15.
Cell Biochem Funct ; 38(5): 591-603, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32207176

RESUMO

Gamma linolenic acid is a polyunsaturated fatty acid having selective anti-tumour properties with negligible systemic toxicity. In the present study, the anti-cancer potential of gamma linolenic acid and its effects on mitochondrial as well as hypoxia-associated marker was evaluated. The effect of gamma linolenic acid was scrutinised against ER + MCF-7 cells by using fluorescence microscopy, JC-1 staining, dot plot assay and cell cycle analysis. The in vitro results were also confirmed using carcinogen (n-methyl-n-nitrosourea) induced in vivo model. The early and late apoptotic signals in the conjugation with mitochondrial depolarisation were found once scrutinised through mitochondrial membrane potential and life death staining after gamma linolenic acid treatment. Gamma linolenic acid arrested the cell cycle in G0/G1 phase with the majority of cell populations in the early apoptotic stage. The translocation of phosphatidylserine was studied through annexin-V FITC dot plot assay. The markers of cellular proliferation (decreased alveolar bud count, histopathological architecture restoration and loss of tumour micro-vessels) were diminished after gamma linolenic acid treatment. Gamma linolenic acid ameliorates the biological effects of n-methyl-n-nitrosourea persuading the mitochondrial mediated death pathway and impeding the hypoxic microenvironment to make a halt in palmitic acid synthesis. SIGNIFICANCE: The present study elaborates the effect of gamma linolenic acid on mammary gland cancer by following mitochondrial-mediated death apoptosis pathway. Gamma linolenic acid also inhibits cell-wall synthesis by the curtailment of HIF-1α and FASN level in mammary gland cancer.


Assuntos
Antineoplásicos/farmacologia , Apoptose/efeitos dos fármacos , Neoplasias da Mama/tratamento farmacológico , Ácido Graxo Sintases/antagonistas & inibidores , Subunidade alfa do Fator 1 Induzível por Hipóxia/antagonistas & inibidores , Mitocôndrias/efeitos dos fármacos , Ácido gama-Linolênico/farmacologia , Neoplasias da Mama/induzido quimicamente , Neoplasias da Mama/patologia , Ciclo Celular/efeitos dos fármacos , Proliferação de Células/efeitos dos fármacos , Ácido Graxo Sintases/metabolismo , Feminino , Humanos , Subunidade alfa do Fator 1 Induzível por Hipóxia/metabolismo , Células MCF-7 , Potencial da Membrana Mitocondrial/efeitos dos fármacos , Metilnitrosoureia , Microscopia de Fluorescência , Mitocôndrias/metabolismo , Células Tumorais Cultivadas
16.
J Cell Physiol ; 235(4): 4022, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31904130
17.
J Dairy Sci ; 103(3): 2701-2706, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-31980223

RESUMO

The current study investigates the therapeutic efficacy of an α-linolenic acid (ALA, 18:3n-3)-based intramammary nanosuspension (ALA-NS) for treatment of subclinical mastitis. After confirmation of mastitis with the help of field-based testing, a total of 9 mixed-breed cows (23 udder quarter samples) were divided into 3 groups and treated with ALA-NS and cefoperazone intramammary suspension for 10 d. Subclinical mastitis on d 1 was confirmed through field-based tests such as pH, California Mastitis Test (CMT), Whiteside test (WST), and bromothymol blue test (BBT) scores. Treatment with ALA-NS (F1 and F2) exhibited significant effects on field-based parameters, along with curtailment of total microbial count [28 ± 3.16 (mean ± standard deviation) and 25 ± 4.24 cfu/50 µL] and somatic cell count (SCC; 3.9 and 2.8 log SCC cells/mL), respectively for ALA-NS F1 and F2, after 10-d treatment. The efficacy of ALA-NS was further affirmed using more stringent markers for inflammation (nuclear factor kappa-light-chain-enhancer of activated B cells, NFκB-p65), milk quality (sterol response element-binding protein-1c, SREBP-1c), and bacterial resistance (ubiquitin carboxyl-terminal hydrolase-1, UCHL-1) in milk samples. Treatment with ALA-NS (at 2 concentrations of ALA, F1 and F2) significantly decreased expression of NFκB-p65, SREBP-1c, and UCHL-1 after d 10 of treatment. Apparently, anti-inflammatory, antibacterial, peripheral analgesic properties of ALA could account for the therapeutic efficacy of the proposed regimen.


Assuntos
Analgésicos/administração & dosagem , Antibacterianos/administração & dosagem , Anti-Inflamatórios/administração & dosagem , Inflamação/tratamento farmacológico , Mastite Bovina/tratamento farmacológico , Leite/normas , Ácido alfa-Linolênico/administração & dosagem , Animais , Bovinos , Cefoperazona/administração & dosagem , Contagem de Células/veterinária , Feminino , Glândulas Mamárias Animais/microbiologia , Mastite Bovina/microbiologia , Nanotecnologia
18.
J Liposome Res ; 30(1): 21-36, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-30741049

RESUMO

Mammary gland tumour has the highest incidence rate and mortality in women, worldwide. The present study envisaged a molecularly targeted nanostructured lipid carrier (NLCs) for doxorubicin (Dox) delivery capable of inducing cellular apoptosis in mammary gland tumour. NLCs were prepared utilizing Perilla frutescens oil (54-69% ω3-fatty acid) as liquid lipid to enhance entrapment of Dox through molecular ion pairing. Biotin decorated NLCs (b-Dox-NLCs) were evaluated in vitro and in vivo. The b-Dox-NLCs showed particle size of 105.2 ± 3.5 nm, zeta potential -35 ± 2 mV, entrapment 99.15 ± 1.71%, drug content 19.67 ± 2.6 mg.g-1, biotin content 5.85 ± 0.64 µg.g-1 and drug release 98.67 ± 2.43% (facilitated by acidic microenvironment) respectively. MTT assay and Flow cytometric analysis revealed higher anti-proliferative capability of b-Dox-NLCs to force apoptosis in MCF-7 cell line vis-à-vis marketed Dox, evidenced by reactive oxygen species level and mitochondrial membrane potential mediated apoptosis. Enhanced antitumor targeting, therapeutic safety and efficacy was exhibited by b-Dox-NLCs, as investigated through tumour volume, animal survival, weight variation, cardiotoxicity and biodistribution studies in 7,12-Dimethylbenz[a]anthracene induced mammary gland tumour. Immunoblotting assay demonstrated b-Dox-NLCs downregulated anti-apoptotic proteins, i.e. bcl-2, MMP-9 while upregulated pro-apoptotic proteins, i.e. caspase-9, p16 and BAX. The experimental results suggest that biotinylated ω3-fatty acid augmented NLCs loaded with Dox are capable of inducing programmed cell death in mammary tumour and can be utilized as safe and effective delivery system with enhanced potential for mammary gland carcinoma therapy.


Assuntos
Antineoplásicos/química , Biotina/química , Neoplasias da Mama/tratamento farmacológico , Doxorrubicina/química , Ácidos Graxos/química , Lipossomos/química , Nanoestruturas/química , Animais , Antracenos/química , Antineoplásicos/administração & dosagem , Antineoplásicos/efeitos adversos , Apoptose/efeitos dos fármacos , Biotina/metabolismo , Cardiotoxicidade/metabolismo , Preparações de Ação Retardada/química , Doxorrubicina/administração & dosagem , Doxorrubicina/efeitos adversos , Composição de Medicamentos , Liberação Controlada de Fármacos , Feminino , Humanos , Células MCF-7 , Membranas Mitocondriais/metabolismo , Terapia de Alvo Molecular , Proteínas Proto-Oncogênicas c-bcl-2/metabolismo , Ratos Wistar , Espécies Reativas de Oxigênio/metabolismo , Propriedades de Superfície , Distribuição Tecidual , Microambiente Tumoral/efeitos dos fármacos
19.
Front Hum Neurosci ; 14: 568051, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33854421

RESUMO

Given its non-invasive nature, there is increasing interest in the use of transcutaneous vagus nerve stimulation (tVNS) across basic, translational and clinical research. Contemporaneously, tVNS can be achieved by stimulating either the auricular branch or the cervical bundle of the vagus nerve, referred to as transcutaneous auricular vagus nerve stimulation(VNS) and transcutaneous cervical VNS, respectively. In order to advance the field in a systematic manner, studies using these technologies need to adequately report sufficient methodological detail to enable comparison of results between studies, replication of studies, as well as enhancing study participant safety. We systematically reviewed the existing tVNS literature to evaluate current reporting practices. Based on this review, and consensus among participating authors, we propose a set of minimal reporting items to guide future tVNS studies. The suggested items address specific technical aspects of the device and stimulation parameters. We also cover general recommendations including inclusion and exclusion criteria for participants, outcome parameters and the detailed reporting of side effects. Furthermore, we review strategies used to identify the optimal stimulation parameters for a given research setting and summarize ongoing developments in animal research with potential implications for the application of tVNS in humans. Finally, we discuss the potential of tVNS in future research as well as the associated challenges across several disciplines in research and clinical practice.

20.
BMC Cancer ; 19(1): 996, 2019 Oct 24.
Artigo em Inglês | MEDLINE | ID: mdl-31651285

RESUMO

BACKGROUND: This study evaluates the anti-cancer effects of Tadalafil (potent PDE-5 inhibitor) in female albino wistar rats against n-methyl n-nitrosourea induced mammary gland carcinogenesis. METHODS: The animals were selected and randomly divided among four groups and each group contains six animals per group. The animal tissue and serum samples were evaluated for the presence of antioxidant parameters and the cellular morphology was studied using carminic staining, haematoxylin staining and scanning electron microscopy followed by immunoblotting analysis. RESULTS: On the grounds of hemodynamic recordings and morphology, n-methyl n-nitrosourea treated group showed distorted changes along with distorted morphological parameters. For morphological analysis, the mammary gland tissues were evaluated using scanning electron microscopy, whole mount carmine staining, haematoxylin and eosin staining. The serum samples were evaluated for the evaluation of oxidative stress markers and inflammatory markers. The level of caspase 3 and 8 were also evaluated for the estimation of apoptosis. The fatty acid profiling of mammary gland tissue was evaluated using fatty acid methyl esters formation. The mitochondrial mediated apoptosis and inflammatory markers were evaluated using immunoblotting assay. CONCLUSION: The results confirm that Tadalafil treatment restored all the biological markers to the normal and its involvement in mitochondrial mediated death apoptosis pathway along with inhibition of inflammatory markers.


Assuntos
Lipoxigenase/metabolismo , Neoplasias Mamárias Experimentais/prevenção & controle , Mitocôndrias/efeitos dos fármacos , Estresse Oxidativo/efeitos dos fármacos , Inibidores da Fosfodiesterase 5/uso terapêutico , Prostaglandina-Endoperóxido Sintases/metabolismo , Transdução de Sinais/efeitos dos fármacos , Tadalafila/uso terapêutico , Animais , Apoptose/efeitos dos fármacos , Carcinogênese/metabolismo , Caspase 3/metabolismo , Caspase 8/metabolismo , Feminino , Frequência Cardíaca/efeitos dos fármacos , Mediadores da Inflamação/sangue , Neoplasias Mamárias Experimentais/induzido quimicamente , Neoplasias Mamárias Experimentais/metabolismo , Neoplasias Mamárias Experimentais/patologia , Metilnitrosoureia/efeitos adversos , Metilnitrosoureia/farmacologia , Mitocôndrias/metabolismo , Ratos , Ratos Wistar , Espécies Reativas de Oxigênio/metabolismo
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...