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1.
Plants (Basel) ; 12(16)2023 Aug 17.
Artigo em Inglês | MEDLINE | ID: mdl-37631181

RESUMO

The nutritional components of cantaloupe, including vitamins, minerals, antioxidants, and dietary fiber, contribute to overall health, improved immunity, hydration, and protection against chronic diseases. This study was conducted to investigate the influence of different concentrations (0 (control), 100, 150, and 200 ppm) of 1-naphthalene acetic acid (1-NAA) on the nutritional components of the cantaloupe (Cucumis melo L. Var. Super White Honey). All the studied treatments were applied twice at the 2nd and 4th leaf stages. The applied concentrations of 1-NAA significantly improved the sex expression and fruit yield attributes. Different nutritional components like proximate contents, minerals, vitamins, selected fatty acids, and amino acids were analyzed. The results showed that the maximum moisture content, proteins, carbohydrates, ash, and energy were recorded with 100 ppm. The higher lipids were recorded during the supplementation of 150 ppm. Significantly greater fibers were recorded using 200 ppm. Regarding minerals, 100 ppm was found to be the best as it increased calcium (Ca), magnesium (Mg), potassium (K), sodium (Na), phosphorous (P), manganese (Mn), copper (Cu), iron (Fe), and zinc (Zn). Vitamins were also found to be the maximum with 100 ppm, including vitamin A, vitamin B, vitamin C, vitamin D, vitamin E, and vitamin K. Total selected fatty acids and amino acids were also found significantly greater in the fruits administered 100 ppm.

2.
Nutrients ; 15(13)2023 Jul 07.
Artigo em Inglês | MEDLINE | ID: mdl-37447385

RESUMO

Alzheimer's disease (AD) is the most common neurodegenerative disease illustrated by neuronal dysfunctions, leading to memory weaknesses and personality changes mostly in the aged population worldwide. The exact cause of AD is unclear, but numerous studies have addressed the involvement of oxidative stress (OS), induced by reactive oxygen species (ROS), to be one of the leading causes in developing AD. OS dysregulates the cellular homeostasis, causing abnormal protein and lipid metabolism. Nutrition plays a pivotal role in modulating the antioxidant system and decreases the neuronal ROS level, thus playing an important therapeutic role in neurodegenerative diseases, especially in AD. Hence, medicinal herbs and their extracts have received global attention as a commercial source of antioxidants Lupeol. Lupeol is a pentacyclic triterpenoid and has many biological functions. It is available in fruits, vegetables, and medicinal plants. It has shown effective antioxidant and anti-inflammatory properties, and higher blood-brain barrier permeability. Also, the binding and inhibitory potentials of Lupeol have been investigated and proved to be effective against certain receptor proteins and enzymes in AD studies by computational molecular docking approaches. Therefore, AD-related research has gained interest in investigating the therapeutic effects of Lupeol. However, despite its beneficial effects in AD, there is still a lack of research in Lupeol. Hence, we compiled in this analysis all preclinical research that looked at Lupeol as an antioxidant and anti-inflammatory agent for AD.


Assuntos
Doença de Alzheimer , Doenças Neurodegenerativas , Triterpenos , Humanos , Idoso , Antioxidantes/farmacologia , Antioxidantes/uso terapêutico , Antioxidantes/metabolismo , Doença de Alzheimer/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Doenças Neurodegenerativas/tratamento farmacológico , Triterpenos/farmacologia , Triterpenos/uso terapêutico , Simulação de Acoplamento Molecular , Estresse Oxidativo , Triterpenos Pentacíclicos/farmacologia , Triterpenos Pentacíclicos/uso terapêutico
3.
Life (Basel) ; 13(2)2023 Feb 10.
Artigo em Inglês | MEDLINE | ID: mdl-36836849

RESUMO

Fruit orchards are frequently irrigated with brackish water. Irrigation with poor quality water is also a major cause of salt accumulation in soil. An excess of salts results in stunted growth, poor yield, inferior quality and low nutritional properties. Melatonin is a low molecular weight protein that shows multifunctional, regulatory and pleiotropic behavior in the plant kingdom. Recently, its discovery brought a great revolution in sustainable fruit production under salinity-induced environments. Melatonin contributed to enhanced tolerance in Zizyphus fruit species by improving the plant defense system's potential to cope with the adverse effects of salinity. The supplemental application of melatonin has improved the generation of antioxidant assays and osmolytes involved in the scavenging of toxic ROS. The tolerance level of the germplasm is chiefly based on the activation of the defense system against the adverse effects of salinity. The current study explored the contribution of melatonin against salinity stress and provides information regarding which biochemical mechanism can be effective and utilized for the development of salt-tolerant germplasm in Zizyphus.

4.
J Trace Elem Med Biol ; 77: 127130, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-36641955

RESUMO

Zinc (Zn) is an essential and the second most abundant trace element after Iron. It can apply antioxidant, anti-inflammatory, and anti-apoptotic activity. It is assumed to be indispensable for cell division, cellular differentiation and cell signalling. Zinc is essential for proper liver function which is also the site of its metabolism. Depleted Zn concentrations have been observed in both acute and chronic hepatic diseases. It is reported that Zn deficiency or abnormal Zn metabolism during majority of liver diseases is attributed to deficient dietary intake of Zn, augmented disposal of Zn in the urine, activation of certain Zn transporters, and expression of hepatic metallothionein. Undoubtedly, Zn is involved in generating many diseases but how and whether it plays role from acute to fulminant stage of all chronic liver diseases remains to be cleared. Here, we will discuss the role of Zn in development of different diseases specifically the involvement of Zn to understand the aetiology and intricate mechanism of dynamic liver diseases.


Assuntos
Hepatopatias , Oligoelementos , Humanos , Zinco/metabolismo , Hepatopatias/metabolismo , Fígado/metabolismo , Oligoelementos/metabolismo , Minerais/metabolismo , Metalotioneína/metabolismo
5.
Int J Vitam Nutr Res ; 92(5-6): 301-310, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32686990

RESUMO

ß-Carotene exhibits antioxidant and hepatoprotective activities via a multitude of biochemical mechanisms. However, the action mechanism involved in antioxidant and anti-inflammatory effects of this carotene in chronic liver diseases is not fully understood. In the present investigation, we have attempted to outline a plausible mechanism of ß-carotene action against liver fibrosis in albino Wistar rats. To induce hepatic fibrosis, diethylnitrosamine (DEN) was administered in experimental rats for two weeks. DEN treated rats were divided into four groups, wherein each group comprised of five rats. ß-Carotene supplement attenuated DEN-induced elevation in LFT markers (P < 0.05); averted depletion of glycogen (24%, P < 0.05) and, increased nitrite (P < 0.05), hydroxyproline (~67%, P < 0.05) and collagen levels (~65%, P < 0.05). Confocal microscopy of tissue sections stained with picrosirius red revealed accrued collagen in DEN-administered group, which was found to be reduced by ß-carotene supplementation. Furthermore, ß-carotene decreased the expression of iNOS/NOS-2 and NF-κB, as revealed by immunohistochemistry and Western immunoblotting. Collectively, these results demonstrate that ß-carotene mitigates experimental liver fibrosis via inhibition of iNOS and NF-κB in-vivo. Thus, ß-carotene may be suggested as a possible nutraceutical to curb experimental liver fibrosis.


Assuntos
Dietilnitrosamina , NF-kappa B , Animais , Anti-Inflamatórios/farmacologia , Antioxidantes/farmacologia , Dietilnitrosamina/metabolismo , Dietilnitrosamina/toxicidade , Glicogênio/metabolismo , Glicogênio/farmacologia , Glicogênio/uso terapêutico , Hidroxiprolina/metabolismo , Hidroxiprolina/farmacologia , Hidroxiprolina/uso terapêutico , Inflamação/induzido quimicamente , Inflamação/tratamento farmacológico , Fígado/metabolismo , Cirrose Hepática/induzido quimicamente , Cirrose Hepática/metabolismo , Cirrose Hepática/prevenção & controle , NF-kappa B/metabolismo , NF-kappa B/farmacologia , NF-kappa B/uso terapêutico , Nitritos/metabolismo , Nitritos/farmacologia , Nitritos/uso terapêutico , Ratos , Ratos Wistar , beta Caroteno/metabolismo , beta Caroteno/farmacologia , beta Caroteno/uso terapêutico
6.
Int J Biol Macromol ; 185: 696-707, 2021 Aug 31.
Artigo em Inglês | MEDLINE | ID: mdl-34174316

RESUMO

The inspection of variations in the proteomic aspects conspire the biomarker discovery in diagnostics of peculiar diseases. Recent developments in high-throughput proteomic techniques have provided leverage in the discovery of biomarkers during the etiology of various diseases. We identified potential biomarkers by utilizing proteomics, bioinformatics and gene expression studies. Meticulous assessment of collagen and hydroxyproline levels along with the glycogen and protein carbonyl levels exhibited deterioration in the N' - Nitrosodiethylamine (NDEA) administered rat livers and subsequent salubrious effect of pomegranate juice. The immunohistochemical inspection of iNOS and nitrite estimation indicated the peccant fibrotic alterations. 2D proteome profiling and MALDI-TOF MS/MS furthered the significant biomarkers to be analyzed for the gene ontology by PANTHER, cluster analysis by DAVID and network simulation by STRING 10.0. Several genes found relevant after MALDI analysis were evaluated by real-time PCR (RTPCR). Our data revealed CYP2b15, HSP70, TRFE, HPT, Il1rl2, Ric8a, Krt18, Hsp90b1 and iNOS as novel biomarkers for the mechanism of pomegranate against liver fibrosis. It can be inferred that NDEA-induced liver fibrosis actuates various biological pathways by the identified biomarkers and pomegranate juice modifies them.


Assuntos
Biomarcadores/metabolismo , Dimetilnitrosamina/efeitos adversos , Cirrose Hepática/tratamento farmacológico , Extratos Vegetais/administração & dosagem , Punica granatum/química , Animais , Suplementos Nutricionais , Modelos Animais de Doenças , Sucos de Frutas e Vegetais , Perfilação da Expressão Gênica , Regulação da Expressão Gênica/efeitos dos fármacos , Fatores de Troca do Nucleotídeo Guanina/genética , Fatores de Troca do Nucleotídeo Guanina/metabolismo , Queratina-18/genética , Queratina-18/metabolismo , Cirrose Hepática/induzido quimicamente , Cirrose Hepática/metabolismo , Masculino , Glicoproteínas de Membrana/genética , Glicoproteínas de Membrana/metabolismo , Proteínas Nucleares/genética , Proteínas Nucleares/metabolismo , Extratos Vegetais/farmacologia , Proteômica , Ratos , Receptores de Interleucina/genética , Receptores de Interleucina/metabolismo , Espectrometria de Massas em Tandem
7.
Microsc Res Tech ; 84(2): 192-201, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33332709

RESUMO

The tunable cobalt oxide nanoparticles (CoONPs) are produced due to the phytochemicals present in Rhamnus virgata (RhV) leaf extract which functions as reducing and stabilization agents. The synthesis of CoONPs was confirmed using different analytical techniques: UV-Vis spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), dynamics light scatterings (DLS), Fourier-transform infrared spectroscopy (FTIR), energy dispersive X-ray, and Raman spectroscopy analyses. Furthermore, multiple biological activities were performed. Significant antifungal and antibacterial potentials have been reported. The in vitro cytotoxic assays of CoONPs revealed strong anticancer activity against human hepatoma HUH-7 (IC50 : 33.25 µg/ml) and hepatocellular carcinoma HepG2 (IC50 : 11.62 µg/ml) cancer cells. Dose-dependent cytotoxicity potency was confirmed against Leishmania tropica (KMH23 ); amastigotes (IC50 : 58.63 µg/ml) and promastigotes (IC50 : 32.64 µg/ml). The biocompatibility assay using red blood cells (RBCs; IC50 : 4,636 µg/ml) has confirmed the bio-safe nature of CoONPs. On the whole, results revealed nontoxic nature of RhV-CoONPs with promising biological potentials.


Assuntos
Antineoplásicos/farmacologia , Antiparasitários/farmacologia , Cobalto/química , Nanopartículas Metálicas/química , Óxidos/química , Extratos Vegetais/química , Folhas de Planta/química , Rhamnus/química , Linhagem Celular Tumoral , Humanos , Leishmania tropica/efeitos dos fármacos , Análise Espectral , Difração de Raios X
8.
Pharmacol Rep ; 71(4): 644-652, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31181380

RESUMO

Globally, esophagus cancer (EC) is one of the most frequently reported malignancies and leading cause of deaths. Currently, different treatment methods are available like chemotherapy, radiation therapy, surgery or their combination. These treatment strategies are not enough and are often associated with adverse side effects. The alternate treatment option like phytochemicals have come up with ease of bioavailability and cost-effectiveness. Due to general acceptance, lower side effects, safety and pleiotropic effect, phytochemicals can be used as an adjuvant treatment for alleviating side effects associated with chemotherapy and radiotherapy. Phytochemicals perform multiple functions; release cytochrome-c, loss mitochondrial membrane potential, down-regulate expression of anti-apoptotic proteins, up-regulate pro-apoptotic proteins, activate caspases, p53, inhibit Akt/mTOR signaling pathway, phosphorylate NF-κB, STAT3 and PI3K. The knowledge compiled here encompasses anti-EC phytochemicals, their occurrence, bioavailability therapeutic effects and mechanism of action by targeting several genes and signaling pathways. Overall, the clinical data compiled on phytochemicals against EC is not sufficient and need future research to provide additional insights for developing potential anticancer drugs in pharma industries.


Assuntos
Antineoplásicos Fitogênicos/uso terapêutico , Proteínas Reguladoras de Apoptose/metabolismo , Neoplasias Esofágicas/tratamento farmacológico , Compostos Fitoquímicos/uso terapêutico , Antineoplásicos Fitogênicos/farmacologia , Apoptose/efeitos dos fármacos , Proteínas Reguladoras de Apoptose/genética , Regulação para Baixo , Neoplasias Esofágicas/metabolismo , Neoplasias Esofágicas/patologia , Neoplasias Esofágicas/prevenção & controle , Humanos , Compostos Fitoquímicos/farmacologia , Plantas Medicinais/química , Regulação para Cima
9.
Biomed Pharmacother ; 109: 1381-1393, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30551389

RESUMO

Skin cancer is a life threatening disease and their prevalence and risk has been increasing over the past three decades causing significant loss to human health worldwide. Mostly skin cancer has developed resistance against chemotherapy and radiotherapy. Therefore, development of novel, cost effective and efficient treatment methods are needed. Phytochemicals extracted from medicinal plants and dietary sources are often biologically active and has attracted the attention of researchers and pharmaceutical industries around the world. Many in vitro and in vivo studies of these bioactive compounds have shown potential antioxidant, anti-proliferative, anti-inflammatory and anti-angiogenic effects in the fight against skin cancer. These phytochemicals also regulate several other molecular processes such as angiogenesis, metastasis and cell cycle to combat skin cancer. The present review provides perspectives on the key phytochemicals, their therapeutic potentials, bioavailability and molecular mechanism of action in the cancer therapeutics. Current challenges and future directions for research are also critically discussed.


Assuntos
Compostos Fitoquímicos/farmacologia , Compostos Fitoquímicos/uso terapêutico , Neoplasias Cutâneas/tratamento farmacológico , Inibidores da Angiogênese/farmacologia , Inibidores da Angiogênese/uso terapêutico , Animais , Antioxidantes/metabolismo , Ciclo Celular/efeitos dos fármacos , Humanos , Neovascularização Patológica/tratamento farmacológico , Neovascularização Patológica/metabolismo , Neovascularização Patológica/patologia , Neoplasias Cutâneas/metabolismo , Neoplasias Cutâneas/patologia
10.
Biomolecules ; 10(1)2019 12 26.
Artigo em Inglês | MEDLINE | ID: mdl-31888037

RESUMO

This study attempts to obtain and test the bioactivities of leaf extracts from a medicinal plant, Geranium wallichianum (GW), when conjugated with zinc oxide nanoparticles (ZnONPs). The integrity of leaf extract-conjugated ZnONPs (GW-ZnONPs) was confirmed using various techniques, including Ultraviolet-visible spectroscopy, X-Ray Diffraction, Fourier Transform Infrared Spectroscopy, energy-dispersive spectra (EDS), scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy. The size of ZnONPs was approximately 18 nm, which was determined by TEM analysis. Additionally, the energy-dispersive spectra (EDS) revealed that NPs have zinc in its pure form. Bioactivities of GW-ZnONPs including antimicrobial potentials, cytotoxicity, antioxidative capacities, inhibition potentials against α-amylase, and protein kinases, as well as biocompatibility were intensively tested and confirmed. Altogether, the results revealed that GW-ZnONPs are non-toxic, biocompatible, and have considerable potential in biological applications.


Assuntos
Geranium/química , Nanopartículas , Extratos Vegetais/química , Folhas de Planta/química , Óxido de Zinco/química , Óxido de Zinco/farmacologia , Anti-Infecciosos/química , Anti-Infecciosos/farmacologia , Anti-Infecciosos/toxicidade , Antioxidantes/química , Antioxidantes/farmacologia , Antioxidantes/toxicidade , Células Hep G2 , Humanos , Leishmania/efeitos dos fármacos , Macrófagos/citologia , Macrófagos/efeitos dos fármacos , Teste de Materiais , Testes de Sensibilidade Microbiana , Inibidores de Proteínas Quinases/química , Inibidores de Proteínas Quinases/farmacologia , Inibidores de Proteínas Quinases/toxicidade , Óxido de Zinco/toxicidade
11.
J Tradit Complement Med ; 8(3): 352-360, 2018 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-29992106

RESUMO

Liver fibrosis is a dynamic pathological condition which can be slowed down in its initial phases. Without proper clinical management of fibrosis, progressive liver damage may lead to cirrhosis and ultimately to liver failure or primary liver cancer, which are irreversible conditions. Therefore, in order to cure fibrotic damage to liver, its early stages should be the centre of attention. In this context, some supplements and 'complementary and alternative medicine (CAM)' deserve specific mention, because of their already recognized natural way of healing and long lasting curative effects. Moreover, CAM display negligible side effects and hence it is gaining worldwide importance in clinical practices. In particular, herbal medicines are now replacing synthetic pharmaceuticals and looked upon as the sources of novel bioactive substances. To develop satisfactory herbal combinations for treating liver fibrosis, phytoproducts need to be systematically evaluated for their potency as anti-fibrotic, anti-hepatotoxic and antioxidant agents. More importantly, the identified herb/agent should have the remarkable tendency to stimulate hepatocytes regeneration. The present review is a systematic account of at least fifty medicinal herbs and their products which in experimental models have demonstrated antifibrotic activity and thus, most likely candidates to offer therapeutic protection to liver. Nevertheless, much additional work is still needed to explore molecular pathways to discover potential applications of these medicines so as to open up new vistas in biomedical research.

12.
Sci Rep ; 8(1): 8606, 2018 06 05.
Artigo em Inglês | MEDLINE | ID: mdl-29872102

RESUMO

Unearthing and employment of healthy substitutes is now in demand to tackle a number of diseases due to the excessive repercussions of synthetic drugs. In this frame of reference pomegranate juice (PGJ) is a boon comprising of anthocyanins and hydrolysable tannins, known for its anti-oxidant and anti-inflammatory properties. Despite various documented roles of PGJ, there are no studies on antifibrotic potential in NDEA-induced mammalian liver fibrotic model. Hepatic fibrosis in rats was induced by the intra-peritoneal injection of NDEA (10 mlkg-1b.wt. of 1% NDEA) in two weeks. Biochemical, histopathological and ultra-structural studies were carried out on control, fibrotic and treated rats. The liver function indices and LPO were increased significantly by intoxication of NDEA. The antioxidant status was disturbed with the decrease in SOD, GST and catalase in the liver and membrane-ATPases as well. Histopathological observations by H&E, M&T, picro-sirius and ultra-structural scrutiny by SEM and TEM indicated liver damage and increase in COX2 and α-SMA by NDEA which was successfully rectified by the supplementation of PGJ. PGJ abrogates liver fibrosis instigated by NDEA in Wistar rats by declining oxidative stress via regulation of Nrf2 and NFκB. These findings point towards pomegranate as a potential and efficacious therapeutic agent against liver fibrosis.


Assuntos
Anti-Inflamatórios/administração & dosagem , Doença Hepática Induzida por Substâncias e Drogas/prevenção & controle , Dietilnitrosamina/toxicidade , Cirrose Hepática/prevenção & controle , Lythraceae/química , Fator 2 Relacionado a NF-E2/metabolismo , NF-kappa B/metabolismo , Alquilantes/administração & dosagem , Alquilantes/toxicidade , Animais , Anti-Inflamatórios/isolamento & purificação , Antioxidantes/administração & dosagem , Antioxidantes/isolamento & purificação , Doença Hepática Induzida por Substâncias e Drogas/patologia , Dietilnitrosamina/administração & dosagem , Histocitoquímica , Cirrose Hepática/induzido quimicamente , Cirrose Hepática/patologia , Estresse Oxidativo , Extratos Vegetais/administração & dosagem , Extratos Vegetais/isolamento & purificação , Ratos Wistar , Resultado do Tratamento
13.
Eur J Pharmacol ; 827: 125-148, 2018 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-29535002

RESUMO

Breast cancer (BC) is a devastating disease in female around the world causing significant health care burden in both developed and developing countries. In many cases BC has shown resistance to chemotherapy, radiation and hormonal therapy. Development of new, cost effective, affordable treatment method is the need of hour. Chemical compounds isolated from plants are often biologically active and is attracting the attention of scientific community. Different in vitro and in vivo studies have shown a potential role in reducing the risk of cancer metastasis. Large number of phytochemicals are considered to regulate several molecular and metabolic processes like cell cycle regulation, apoptosis activation, angiogenesis and metastatic suppression that can hinders cancer progression. An extensive review of literature has been conducted to underline the key phytochemicals and their mechanism of action. This review article has discussed in detail the regulatory roles of phytochemicals, their analogs and nanoformulations and the probability of using phytochemicals in therapeutic management of BC. Finally, current limitations, challenges and future perspectives of these phytochemicals are also critically discussed.


Assuntos
Antineoplásicos/farmacologia , Neoplasias da Mama/tratamento farmacológico , Descoberta de Drogas/métodos , Compostos Fitoquímicos/farmacologia , Animais , Antineoplásicos/uso terapêutico , Neoplasias da Mama/patologia , Humanos , Invasividade Neoplásica , Metástase Neoplásica , Compostos Fitoquímicos/uso terapêutico
14.
Toxicol Ind Health ; 33(12): 911-921, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29069986

RESUMO

Chromium oxide nanoparticles (Cr2O3 NPs) have a wide range of applications in industry. They are used as pigments, catalysts, wear-resistant or high-temperature-resistant coating material and are used in liquid crystal displays. In view of ever escalating use of NPs, risk assessment becomes obligatory to ensure the safety of both human health and the ecosystem. The present study was designed and conducted to evaluate biochemical changes and histopathological alterations in kidneys and brain of rats, following exposure to Cr2O3 NPs. Male Wistar rats were divided into low-dose (50 µg/100 g body weight (bwt) groups and high-dose (200 µg/100 g bwt) groups. Each group type received oral administration of Cr2O3 NPs for multiple durations (single dosing, once daily for 7 days and once daily for 14 days, respectively). According to our data, this allotment presented a meaningful picture of NPs behaviour in different scenarios. In the kidneys and brain of Cr2O3 NPs-exposed animals, reactive oxygen species (ROS) production caused a significant increase in malondialdehyde (MDA) concentration along with a significant decrease in superoxide dismutase and glutathione levels, as compared to controls. Histopathological changes in these organs confirmed cellular injury and functional damage due to exposure to Cr2O3 NPs. In this study, we have distinguished pathological alterations consequent to deleterious oxidative stress due to enhanced ROS generation after Cr2O3 NPs exposure.


Assuntos
Encéfalo/efeitos dos fármacos , Compostos de Cromo/toxicidade , Rim/efeitos dos fármacos , Nanopartículas Metálicas/toxicidade , Animais , Antioxidantes/metabolismo , Encéfalo/patologia , Química Encefálica/efeitos dos fármacos , Rim/química , Rim/patologia , Peroxidação de Lipídeos/efeitos dos fármacos , Masculino , Estresse Oxidativo/efeitos dos fármacos , Ratos , Ratos Wistar , Testes de Toxicidade
15.
Pharm Biol ; 2014 Jan 10.
Artigo em Inglês | MEDLINE | ID: mdl-24405044

RESUMO

Abstract Context: Altered vitamin B12 levels have been correlated with hepatotoxicity; however, further evidence is required to establish its protective role. Objective: To evaluate the effects of vitamin B12 supplement in protecting N'-nitrosodimethylamine (NDMA)-induced hepatic fibrosis in Wistar rats. Materials and methods: Hepatic fibrosis was induced by administering NDMA in doses of 10 mg/kg body weight thrice a week for 21 days. Another group received equal doses (10 mg/kg body weight) of vitamin B12 subsequent to NDMA treatment. Animals from either group were sacrificed weekly from the start of the treatment along with their respective controls. Progression of hepatic fibrosis, in addition to the effect of vitamin B12, was assessed biochemically for liver function biomarkers, liver glycogen, hydroxyproline (HP) and B12 reserves along with histopathologically by hematoxylin and eosin (H & E) as well immunohistochemical staining for α-SMA expression. Results and discussion: Elevation in the levels of aminotransferases, SALP, total bilirubin and HP was observed in NDMA treated rats, which was concomitant with remarkable depletion in liver glycogen and B12 reserves (p < 0.05). Liver biopsies also demonstrated disrupted lobular architecture, collagen amassing and intense fibrosis by NDMA treatment. Immunohistochemical staining showed the presence of activated stellate cells that was dramatically increased up to day 21 in fibrotic rats. Following vitamin B12 treatment, liver function biomarkers, glycogen contents and hepatic vitamin B12 reserves were restored in fibrotic rats, significantly. Vitamin B12 administration also facilitated restoration of normal liver architecture. Conclusion: These findings provide interesting new evidence in favor of protective role for vitamin B12 against NDMA-induced hepatic fibrosis in rats.

16.
Chem Biol Interact ; 181(2): 145-53, 2009 Oct 07.
Artigo em Inglês | MEDLINE | ID: mdl-19589336

RESUMO

The root extract of Operculina turpethum (OTE) has been used as an anti-inflammatory, purgative, and hepato-protective agent. N-Nitrosodimethylamine (NDMA) is a potent hepatotoxin that induces fibrosis of the liver. In the present study, we examined the therapeutic effects of OTE root extract against NDMA-induced hepatotoxicity and clastogenicity in rats. Hepatic fibrosis was induced in adult male albino rats through serial intraperitoneal administrations of NDMA at a concentration of 10mg/kg body weight on three consecutive days of each week over a period of three weeks. A group of rats received OTE orally in doses of 75, 150 and 200mg/kg body weight at 5h after the administration of NDMA. The controls and treated animals were sacrificed on days-7, 14 and 21 after the start of the administration of NDMA. The progression of hepatic fibrosis as well as the amelioration effect of OTE was evaluated through histopathologically as well as by immunohistochemical staining for the activation of hepatic stellate cells. Alterations in serum and liver biochemical parameters and LDH isoenzymes were also studied. Serial administration of NDMA resulted in well formed fibrosis in the liver and induction of micronuclei in the bone marrow cells. Staining of alpha-SMA demonstrated activated stellate cells from day-7 onwards which was dramatically increased on day-21. An elevation of micronuclei count, liver function enzymes, serum hydroxyproline levels and LDH isoenzymes 4 and 5 were also observed. All these changes were remarkably reduced in OTE administered animals and fibrogenesis was completely absent. Our results suggest that OTE has hepatoprotective and anti-clastogenic effects against NDMA-induced hepatic fibrosis. Therefore OTE may be used as a hepatoprotective agent against various liver diseases including toxic liver injury.


Assuntos
Doença Hepática Induzida por Substâncias e Drogas/etiologia , Convolvulaceae/química , Dimetilnitrosamina/toxicidade , Fígado/efeitos dos fármacos , Mutagênicos/toxicidade , Extratos Vegetais/farmacologia , Actinas/metabolismo , Animais , Peso Corporal/efeitos dos fármacos , Relação Dose-Resposta a Droga , Masculino , Músculo Liso/metabolismo , Tamanho do Órgão/efeitos dos fármacos , Ratos , Ratos Wistar
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