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1.
J Biosci ; 462021.
Artigo em Inglês | MEDLINE | ID: mdl-34148876

RESUMO

Amarogentin (active component of Chirata) was found to prevent CCl4/NDEA-induced liver carcinogenesis at mild dysplastic stage through modulation of cell cycle, apoptosis, self-renewal pathways. The cell cycle regulatory genes LIMD1, P16 and RBSP3 were found to be upregulated in restricted liver lesions. To understand the mechanism of upregulation during restriction of cacinogenesis, the effect of amarogentin on epigenetic modification was evaluated in this study. It was also validated in vitro. Hypermethylation of LIMD1 and P16 was seen in mouse hepatocellular carcinoma (30th week carcinogen control mice); however, hypomethylation of these genes was seen in amarogentin-treated liver. In the case of RBSP3, no such change was seen. DNMT1 expression (mRNA/protein) was significantly increased in later stages of carcinogenesis, whereas its expression was comparable to normal liver in the case of amarogentin treatment. No significant change in expression (mRNA/protein) of HDAC1/2 was observed irrespective of treatment. Amarogentin treatment upregulated the expression (mRNA/protein) of LIMD1, P16 and RBSP3 in the HepG2 cell line. Here also treated cells showed LIMD1 and P16 hypomethylation with DNMT1 downregulation. Increased expression of LIMD1, P16 and RBSP3 after treating cells with demethylating agent 5-aza-2-deoxycytidine indicated epigenetic modulation by amarogentin treatment.


Assuntos
Anticarcinógenos/farmacologia , Carcinogênese/efeitos dos fármacos , Carcinoma Hepatocelular/tratamento farmacológico , Iridoides/farmacologia , Neoplasias Hepáticas/tratamento farmacológico , Animais , Apoptose/efeitos dos fármacos , Tetracloreto de Carbono/toxicidade , Carcinogênese/genética , Carcinogênese/metabolismo , Carcinogênese/patologia , Carcinoma Hepatocelular/induzido quimicamente , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/metabolismo , Ciclo Celular/efeitos dos fármacos , Ciclo Celular/genética , Inibidor p16 de Quinase Dependente de Ciclina/genética , Inibidor p16 de Quinase Dependente de Ciclina/metabolismo , DNA (Citosina-5-)-Metiltransferase 1/genética , DNA (Citosina-5-)-Metiltransferase 1/metabolismo , Decitabina/farmacologia , Dietilnitrosamina/toxicidade , Modelos Animais de Doenças , Epigênese Genética , Feminino , Regulação Neoplásica da Expressão Gênica , Células Hep G2 , Histona Desacetilase 1/genética , Histona Desacetilase 1/metabolismo , Histona Desacetilase 2/genética , Histona Desacetilase 2/metabolismo , Humanos , Peptídeos e Proteínas de Sinalização Intracelular/genética , Peptídeos e Proteínas de Sinalização Intracelular/metabolismo , Proteínas com Domínio LIM/genética , Proteínas com Domínio LIM/metabolismo , Fígado/efeitos dos fármacos , Fígado/metabolismo , Fígado/patologia , Neoplasias Hepáticas/induzido quimicamente , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/metabolismo , Camundongos , Monoéster Fosfórico Hidrolases/genética , Monoéster Fosfórico Hidrolases/metabolismo , Transdução de Sinais
2.
Mol Cell Biochem ; 476(10): 3701-3709, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34081254

RESUMO

Hyaluronic acid (HA)-CD44 pathway showed association with several malignancies. The natural polyphenols Plumbagin, Pongapin and Karanjin showed anti-cancer activities in different tumors including cervical carcinoma. To understand their mechanism of anti-cancer activity, the effect of the compounds on HA-CD44 pathway was analyzed in cervical cancer cell line HeLa. The mRNA expression of three different isoforms of CD44 i.e., CD44s, CD44v3, and CD44v6, was differentially downregulated by the compounds. This was validated by Western blot and immunocytochemical analysis of CD44s.The low molecular weight HA (LMW-HA) showed growth promoting activity in HeLa at low concentration, whereas high molecular weight HA (HMW-HA) had no such effect. The compounds could preferentially downregulate the LMW-HA level in HeLa, as evident in the cell as well as in the cell-free conditioned medium. Concentration-dependent upregulation of HA synthase-2 (HAS2) was seen in the cell by the compounds, whereas differential downregulation of hyalurinidases 1-4 (HYAL 1-4), predominantly HYAL1, were seen. The compounds could also downregulate the downstream target of the pathway p-AKT (T-308) in concentration-dependent manner. Thus, the compounds could attenuate the HA-CD44 pathway in HeLa cell to restrict the tumor growth.


Assuntos
Benzopiranos/farmacologia , Regulação para Baixo/efeitos dos fármacos , Flavonas/farmacologia , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Receptores de Hialuronatos/biossíntese , Ácido Hialurônico/metabolismo , Naftoquinonas/farmacologia , Proteínas de Neoplasias/biossíntese , Transdução de Sinais/efeitos dos fármacos , Neoplasias do Colo do Útero/metabolismo , Feminino , Células HeLa , Humanos , Receptores de Hialuronatos/genética , Ácido Hialurônico/genética , Proteínas de Neoplasias/genética , Transdução de Sinais/genética , Neoplasias do Colo do Útero/tratamento farmacológico , Neoplasias do Colo do Útero/genética , Neoplasias do Colo do Útero/patologia
3.
Asian Pac J Cancer Prev ; 21(10): 2865-2875, 2020 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-33112542

RESUMO

BACKGROUND: The Anticancer property of Swertia chirata has been well established. It forms a rich source of compounds to which its anticancer property can be attributed, among the compounds found in S. chirata xanthones form an important group. Among the most abundant xanthones found in S. chirata, 1,5,8-trihydroxy-3-methoxy xanthone (TMX) was found to be most effective. As metastasis is the underlying cause of most cancer-related deaths, in this study, we evaluated the anti-metastatic potential of TMX against adenocarcinoma both in vivo and in vitro. MATERIALS AND METHODS: In vivo anti-metastatic potential was proved by histological evidence of different organs, giemsa staining of bone marrow, subcutaneous re-injection of the aberrant bone marrow cells into the right flank of the mice to observe the formation of tumors and analyzing the markers related to metastasis by immunohistochemistry (IHC) and western blot. In vitro validation of anti-metastatic potential was carried out against human breast adenocarcinoma cell line MCF-7 by primarily analyzing the migratory property of cells through scratch wound healing assay and the ability of cells to form colonies. The re-validation part was performed by western blot of markers related to metastasis and real-time analysis of EMT related markers. RESULTS: In vivo, TMX treatment restricted metastasis of EAC induced solid tumor to liver, lung, bone marrow, and validation of this finding was achieved by down regulation of metastatic and EMT markers.  In vitro, TMX treatment restricted migratory and colony forming ability of MCF-7 cells by down regulating metastatic and EMT markers. CONCLUSION: It was proved from our study that TMX treatment successfully reduced the metastatic potential of EAC induced solid tumor, with in vitro validation TMX on the MCF-7 cell line.


Assuntos
Adenocarcinoma/tratamento farmacológico , Antineoplásicos Fitogênicos/farmacologia , Neoplasias da Mama/tratamento farmacológico , Extratos Vegetais/farmacologia , Swertia/química , Xantonas/farmacologia , Adenocarcinoma/secundário , Animais , Apoptose , Neoplasias da Mama/patologia , Movimento Celular , Proliferação de Células , Feminino , Humanos , Técnicas In Vitro , Camundongos , Células Tumorais Cultivadas , Ensaios Antitumorais Modelo de Xenoenxerto
4.
Indian J Med Res ; 152(3): 285-295, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-33107489

RESUMO

Background & objectives: Medicinal plants like Swertia chirata are rich sources of different xanthones. This study was aimed to assess the cytotoxic potential of four most abundant xanthones present in S. chirata both in vivo and in vitro in Ehrlich ascites carcinoma (EAC), a mouse transplantable breast carcinoma cell line and two human breast carcinoma cell lines (MCF-7 and MDA-MB-231). Methods: Four xanthones derived from S. chirata namely 1-hydroxy-3,7,8-trimethoxyxanthone (XA), 1,8-dihydroxy-3,5-dimethoxyxanthone (XB), 1-hydroxy-3,5,8-trimethoxyxanthone (XC) and 1,5,8-trihydroxy-3-methoxyxanthone (XD) were used for determination of sub-lethal dose on the cell lines EAC, MCF-7, MDA-MB-231 and verified toxicity of sub-lethal dose on normal murine fibroblast cells. Cytotoxicity was measured in vivo and survivability of mice was plotted accordingly. Therapeutic efficacy of XD was evaluated both in vivo and in vitro by determination of lipid peroxidation (LPO), reactive oxygen species (ROS) generation and by quantitating the enzyme status (GSH, catalase, superoxide dismutase) in treated and untreated samples. DNA damage was evaluated using comet and DNA fragmentation assays. Furthermore, apoptotic effect was analyzed by flow cytometry and validated by TUNEL assay and Western blotting. Results: Among all the xanthones tested XD showed IC50at the lowest dose, and normal cells were unaffected at this dose. Survivability of mice increased significantly when treated with XD compared to other xanthones and cisplatin. Significantly increased ROS and LPO were found in cancer cells as a result of XD treatment which was unaltered in normal cell line. XD induced DNA damage and apoptosis in cancer cell lines. Interpretation & conclusions: Our experimental data indicate that XD may potentially act as a chemotherapeutic agent by enhancing ROS in breast cancer cells thereby leading to apoptosis.


Assuntos
Neoplasias da Mama , Plantas Medicinais , Swertia , Xantonas , Animais , Apoptose , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/genética , Humanos , Camundongos , Extratos Vegetais , Xantonas/farmacologia
5.
Phytother Res ; 33(4): 1084-1094, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-30834631

RESUMO

In this study, the antitumor activity of two furanoflavanoid derivatives, Pongapin and Karanjin, was evaluated in comparison with Plumbagin, a plant-derived polyphenol with proven antitumor activity. The compounds differentially inhibit the growth of different cancer cell lines (most effective on HeLa cells), with very low inhibitory effect on the growth of normal mouse embryonic fibroblast cell line. Pongapin like Plumbagin could significantly increase the intracellular reactive oxygen species (ROS) in the HeLa cells by stabilization of nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor (I-κB) expression and reduction of nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) expression. In contrast, Karanjin could decrease ROS level by inhibition of I-κB degradation resulting restriction of NF-κB nuclear translocation. Pongapin and Plumbagin significantly increased DNA damage-induced p53 expression and p21 nuclear expression. However, Karanjin treatment showed low DNA damage with increased p53 expression. The compounds induced G2/M arrest and increase in SubG1 population, indicating induction of apoptosis. Apoptosis was further validated by acridine orange/ethidium bromide dual staining and terminal deoxynucleotidyl transferase dUTP nick-end labeling assay in HeLa cells after treatment with the compounds. The compounds induced caspase-dependent apoptosis through induction of Bax/Bcl-2 ratio either through increased expression of Bax by Pongapin and Plumbagin or low expression of Bcl-2 by Karanjin. Thus, Pongapin and Karanjin may be potential natural anticancer agents in the future, like Plumbagin.


Assuntos
Apoptose/efeitos dos fármacos , Linfócitos B/metabolismo , Benzopiranos/uso terapêutico , Pontos de Checagem do Ciclo Celular/efeitos dos fármacos , Dano ao DNA/genética , Flavonas/uso terapêutico , Millettia/química , NF-kappa B/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Neoplasias do Colo do Útero/tratamento farmacológico , Benzopiranos/farmacologia , Feminino , Flavonas/farmacologia , Células HeLa , Humanos , Transdução de Sinais , Neoplasias do Colo do Útero/patologia
6.
Free Radic Res ; 53(1): 57-67, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30624093

RESUMO

Therapeutic efficacy of nucleoside analogues (NAs) like Gemcitabine, 5-fluorouracil in cancer treatment is already well established. Most of the known NAs are highly toxic to normal cells due to its non-specific action; thus searching for non-toxic NAs are still going on. For that purpose we have synthesised nine different NAs by alteration of their structural and functional groups. The aim of present study is to investigate the therapeutic potential of NAs against mice bearing breast adenocarcinoma cells at IC50 dose for 10 days treatment schedule. Results of the present study showed that, among the seven nucleoside analogues, NA-7 and NA-9 showed maximum therapeutic efficacy in controlling cancer cells by inhibiting cell proliferation and inducing apoptosis without any adverse effects to normal host cells. Additionally, NAs significantly decreased the tumour burden and enhanced survivability of host through generation of reactive oxygen species in tumour cells. These ultimately led to DNA damage, depolarisation of mitochondrial membrane potential and apoptosis in tumour cells. To find out the molecular mechanisms, we showed that administration of NA-7 and NA-9, down- regulating the expression of Bcl-2, cyclin D1, C-myc, P-21 and up-regulating the expression of P-53, Cyt-c, Bax, caspase-3 and caspase-9. The results suggest that NA-7 and NA-9 exhibits significant antitumor activity than 5-fluorouracil by modulating the cell cycle checkpoints and inducing apoptosis in Ehrlich ascites carcinoma (EAC)-bearing mice. Additionally, NA-7 and NA-9 did not show any clastogenic effect on bone marrow cells at sub-lethal dose. Thus, the present study clearly suggested therapeutic benefit of NAs by augmenting anticancer efficacy and diminishing toxicity to the host.


Assuntos
Antineoplásicos/farmacologia , Carcinoma de Ehrlich/tratamento farmacológico , Carcinoma de Ehrlich/patologia , Nucleosídeos/análogos & derivados , Nucleosídeos/farmacologia , Animais , Apoptose/efeitos dos fármacos , Carcinoma de Ehrlich/metabolismo , Proliferação de Células/efeitos dos fármacos , Relação Dose-Resposta a Droga , Ensaios de Seleção de Medicamentos Antitumorais , Feminino , Camundongos , Conformação Molecular , Espécies Reativas de Oxigênio/metabolismo , Relação Estrutura-Atividade
7.
J Cell Physiol ; 234(1): 825-836, 2018 01.
Artigo em Inglês | MEDLINE | ID: mdl-30078217

RESUMO

In this study, antitumor activity of epigallocatechin gallate (EGCG; major component of green tea polyphenol), eugenol (active component of clove), and amarogentin (active component of chirata plant) either alone or in combination were evaluated in Hela cell line. It was evident that EGCG with eugenol-amrogentin could highly inhibit the cellular proliferation and colony formation than individual treatments. Induction of apoptosis was also higher after treatment with EGCG in combination with eugenol-amrogentin than individual compound treatments. The antiproliferative effect of these compounds was due to downregulation of cyclinD1 and upregulation of cell cycle inhibitors LIMD1, RBSP3, and p16 at G1/S phase of cell cycle. Treatment of these compounds could induce promoter hypomethylation of LimD1 and P16 genes as a result of reduced expression of DNA methyltransferase 1 (DNMT1). Thus, our study indicated the better chemotherapeutic effect of EGCG in combination with eugenol-amarogentin in Hela cell line. The chemotherapeutic effect might be due to the epigenetic modification particularly DNA hypomethylation through downregulation of DNMT1.


Assuntos
Catequina/análogos & derivados , DNA (Citosina-5-)-Metiltransferase 1/genética , Sinergismo Farmacológico , Neoplasias do Colo do Útero/tratamento farmacológico , Protocolos de Quimioterapia Combinada Antineoplásica/farmacologia , Apoptose/efeitos dos fármacos , Catequina/química , Catequina/farmacologia , Proliferação de Células/efeitos dos fármacos , Eugenol/farmacologia , Feminino , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Células HeLa , Humanos , Peptídeos e Proteínas de Sinalização Intracelular , Iridoides/farmacologia , Proteínas com Domínio LIM , Chá/química , Proteínas Supressoras de Tumor/genética , Neoplasias do Colo do Útero/genética , Neoplasias do Colo do Útero/patologia
8.
J Biochem ; 160(3): 163-76, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-27008864

RESUMO

Iron chelation therapies are required for the treatment of iron overloaded patients; nonetheless, their side effects are also well known. We have evaluated iron-chelating activity of wheat grass extract (WHE) and its purified compound, mugineic acid in murine model with phenylhydrazine (PHZ) and dextran induced acute and chronic iron overload conditions. PHZ and dextran treatment induced acute and chronic iron overload condition in mice, respectively, as indicated by increased serum and tissue iron in both cases. Iron overload was also accompanied with haemosiderosis in tissues (liver and spleen). These PHZ and dextran -: treated mice were orally treated with either crude WHE or purified mugineic acid. The efficacy of mugineic acid and WHE was compared with the potent oral iron chelator ICL670 (Exjade). PHZ and dextran treatment followed by oral administration of WHE or mugineic acid significantly checked the rise of serum/plasma levels of iron as well as tissue iron and also, haemosiderosis in tissues. The results are highly comparable with known iron chelator ICL670. WHE and purified mugineic acid, both seem to have significant prospect to be the cheap, non-toxic, hexadentate and oral therapeutic agents to prevent or alleviate toxic iron overload in patients.


Assuntos
Ácido Azetidinocarboxílico/análogos & derivados , Hemossiderose , Fígado/metabolismo , Baço/metabolismo , Triticum/química , Animais , Ácido Azetidinocarboxílico/química , Ácido Azetidinocarboxílico/isolamento & purificação , Ácido Azetidinocarboxílico/farmacologia , Hemossiderose/tratamento farmacológico , Hemossiderose/metabolismo , Hemossiderose/patologia , Humanos , Quelantes de Ferro/química , Quelantes de Ferro/isolamento & purificação , Quelantes de Ferro/farmacologia , Fígado/patologia , Camundongos , Baço/patologia
9.
Nat Prod Res ; 30(4): 474-7, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-25782530

RESUMO

Methylphophorbide a (MPa) has been isolated from the ethanol extract of the wheat grass plant. Its antioxidative efficacy is evaluated by hydroxyl radical scavenging activities and reducing capacity which are significantly up regulated in comparison with aqueous extract of the plant. The compound shows iron-binding capacity where the Fe(2+) binds with MPa by two types of binding patterns with dissociation constants 157.17 and 27.89. It has antioxidative and cytotoxic effects on HeLa and Hep G2 cells. The cancerous cell survivability decreases with increasing concentration of MPa. These findings have provided evidence for the traditional use of the wheat grass plant in the treatment of cancers, oxidative stress and iron overloaded disorders.


Assuntos
Antineoplásicos Fitogênicos/farmacologia , Antioxidantes/farmacologia , Clorofila/análogos & derivados , Triticum/química , Apoptose/efeitos dos fármacos , Clorofila/farmacologia , Células HeLa , Células Hep G2 , Humanos , Estresse Oxidativo/efeitos dos fármacos , Extratos Vegetais/química
10.
Mol Carcinog ; 55(7): 1138-49, 2016 07.
Artigo em Inglês | MEDLINE | ID: mdl-26154024

RESUMO

Amarogentin, a secoiridoid glycoside isolated from medicinal plant Swertia chirata, was found to restrict CCl4 /N-nitrosodiethyl amine (NDEA) induced mouse liver carcinogenesis by modulating G1/S cell cycle check point and inducing apoptosis. To understand its therapeutic efficacy on stem cell self renewal pathways, prevalence of CD44 positive cancer stem cell (CSC) population, expressions (mRNA/protein) of some key regulatory genes of self renewal Wnt and Hedgehog pathways along with expressions of E-cadherin and EGFR were analyzed during the liver carcinogenesis and in liver cancer cell line HepG2. It was observed that amarogentin could significantly reduce CD44 positive CSCs in both pre and post initiation stages of carcinogenesis than carcinogen control mice. In Wnt pathway, amarogentin could inhibit expressions of ß-catenin, phospho ß-catenin (Y-654) and activate expressions of antagonists sFRP1/2 and APC in the liver lesions. In Hedgehog pathway, decreased expressions of Gli1, sonic hedgehog ligand, and SMO along with up-regulation of PTCH1 were seen in the liver lesions due to amarogentin treatment. Moreover, amarogentin could up-regulate E-cadherin expression and down-regulate expression of EGFR in the liver lesions. Similarly, amarogentin could inhibit HepG2 cell growth along with expression and prevalence of CD44 positive CSCs. Similar to in vivo analysis, amarogentin could modulate the expressions of the key regulatory genes of the Wnt and hedgehog pathways and EGFR in HepG2 cells. Thus, our data suggests that the restriction of liver carcinogenesis by amarogentin might be due to reduction of CD44 positive CSCs and modulation of the self renewal pathways. © 2015 Wiley Periodicals, Inc.


Assuntos
Tetracloreto de Carbono/toxicidade , Redes Reguladoras de Genes/efeitos dos fármacos , Receptores de Hialuronatos/metabolismo , Iridoides/administração & dosagem , Neoplasias Hepáticas/tratamento farmacológico , Células-Tronco Neoplásicas/efeitos dos fármacos , Animais , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Feminino , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Células Hep G2 , Humanos , Iridoides/farmacologia , Neoplasias Hepáticas/induzido quimicamente , Neoplasias Hepáticas/genética , Camundongos , Células-Tronco Neoplásicas/imunologia , Via de Sinalização Wnt/efeitos dos fármacos
11.
Nat Prod Res ; 28(17): 1379-82, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24697628

RESUMO

Triticum aestivum (wheat grass) is widely used in traditional medicine to treat various diseases. Previously the purified compounds and crude extract of T. aestivum were established to have iron chelation potency and antioxidant activity. So it is necessary to evaluate the toxic properties of any compound isolated from plant extract to prevent any untoward side effects. The aim of this study was to determine the acute oral toxicity level of our purified compounds, i.e. mugineic acids and methylpheophorbide a., and crude extract of T. aestivum, on Swiss albino mice at dosage of 2000 mg/kg for a period of 14 days using the organisation for economic co-operation and development guidelines 423. There was no mortality. No change in behavioural pattern, clinical signs, body weight and blood biochemistry profile were observed. Kidney and liver showed normal histo-pathological architecture. Hence, the oral administration of compounds and extract of T. aestivum did not produce any significant toxic effect on mice. Thus we may conclude that the extract can be utilised for pharmaceutical formulations as iron chelator and antioxidant agent for various diseases.


Assuntos
Antioxidantes/análise , Antioxidantes/isolamento & purificação , Quelantes de Ferro/análise , Triticum/química , Animais , Rim/metabolismo , Fígado/metabolismo , Masculino , Camundongos , Testes de Toxicidade Aguda
12.
Phytother Res ; 28(8): 1188-95, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24399783

RESUMO

Karanjin, the furanoflavonoid reported to possess gastroprotective and anti-diabetic properties, was investigated against experimental arthritis and its molecular signalling in inflammation was explored in macrophages. Karanjin was isolated from hexane extract of Pongamia pinnata seeds and was evaluated on arthritis markers in adjuvant induced arthritis model (AIA) in two doses (per oral; 10 mg/kg/day and 20 mg/kg/day). Karanjin dose dependently reduced collagen and cartilage breakdown markers viz. urinary hydroxyproline and glucosamine, respectively, serum lysosomal enzymes responsible for articular cartilage damage, and major proinflammatory cytokine TNFα, secreted by macrophages involved in articular inflammation and destruction. Karanjin also prevented joint damage as evidenced from arthritis score, radiographic and histopathological analysis. To delineate the molecular target of Karanjin, in vitro study on LPS induced macrophages were performed at calibrated non toxic doses (4 µg/mL and 6 µg/mL). Karanjin reduced TNFα production and also showed potent inhibitory effect on nitric oxide and reactive oxygen species production which is generally induced by TNFα from activated macrophages. NF-κB, the key regulator of TNFα signalling during inflammation was significantly suppressed by Karanjin. Our study for the first time highlights the anti-inflammatory role of Karanjin in experimental arthritis model as well as on macrophage signalling, thereby depicting its probable mechanism of action.


Assuntos
Anti-Inflamatórios/farmacologia , Artrite Experimental/tratamento farmacológico , Benzopiranos/farmacologia , Inflamação/tratamento farmacológico , Macrófagos/metabolismo , Millettia/química , Animais , Artrite Experimental/induzido quimicamente , Cartilagem Articular/efeitos dos fármacos , Cartilagem Articular/patologia , Células Cultivadas , Lipopolissacarídeos , Macrófagos/efeitos dos fármacos , Masculino , NF-kappa B/metabolismo , Óxido Nítrico/metabolismo , Ratos Wistar , Espécies Reativas de Oxigênio/metabolismo , Sementes/química , Fator de Necrose Tumoral alfa/metabolismo
13.
J Immunotoxicol ; 11(3): 222-30, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-23971718

RESUMO

Pongamia pinnata is a plant known for its therapeutic usage in Indian traditional medicine. Despite the controversy regarding toxic flavonoid and erucic acid content, the seed of this plant is consumed in tribal medicine and its oil is used in Ayurveda to treat psoriasis and arthritis. This study explored the potential anti-arthritic effects of a P. pinnata seed (hexane) extract (PSE) at non-lethal doses in an adjuvant-induced arthritic rat model; possible mechanisms of any observed effects were also explored. After establishing the lethal doses arising from oral exposure to the extract, the material was administered per os daily at two doses (0.3 g/kg/day; 0.5 g/kg/day) to arthritic rats. Other rats received indomethacin or vehicle (control). Treatments were performed for a total of 14 days. One day after the final exposure, the rats were euthanized to permit harvest of various cells, blood, and tissues for analyses. Paw diameter and tissue myeloperoxidase activity in the paws were evaluated as indices for edema and neutrophil infiltration into the tissue. The severity of arthritis in the experimental rats was assessed via measures of urinary hydroxyproline (HP) and glucosamine, and of serum pro-inflammatory TNFα and anti-inflammatory IL-10. The extent of NF-κB p65 nuclear translocation in peritoneal macrophages harvested from naïve rats and then treated in vitro was also assessed. The results indicated that exposure to PSE significantly decreased paw diameter, tissue myeloperoxidase level, and levels of urinary HP and glucosamine, as well as of serum TNFα and IL-10 in adjuvant-injected (arthritic) rats. In vitro PSE treatment also resulted in a marked inhibition of NF-κB p65 nuclear translocation in primary cultures of peritoneal macrophages. Thus, PSE appears to be able to prevent experimental arthritis, in part, by helping to maintain the balance between pro- and anti-inflammatory cytokines and by inhibiting NF-κB activation.


Assuntos
Artrite Experimental/terapia , Hidroxiprolina/urina , Macrófagos Peritoneais/imunologia , Millettia/imunologia , Fator de Transcrição RelA/metabolismo , Transporte Ativo do Núcleo Celular , Administração Oral , Animais , Artrite Experimental/imunologia , Células Cultivadas , Adjuvante de Freund/imunologia , Glucosamina/urina , Interleucina-10/sangue , Masculino , Ayurveda , Extratos Vegetais/administração & dosagem , Ratos , Ratos Wistar , Sementes , Ativação Transcricional/efeitos dos fármacos , Fator de Necrose Tumoral alfa/sangue
14.
Carcinogenesis ; 33(12): 2424-31, 2012 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-22948180

RESUMO

Amarogentin, a secoiridoid glycoside, is an active component of the medicinal plant Swertia chirata. In this study, chemopreventive and chemotherapeutic actions of amarogentin were evaluated in a carbon tetrachloride (CCl(4))/N-nitrosodiethylamine (NDEA)-induced liver carcinogenesis mouse model system during continuous and posttreatment schedule. Better survival, no toxicity and increased body weight were noted in amarogentin-treated mice. Reduction in proliferation and increase in apoptosis frequency were evident in amarogentin-treated groups. In carcinogen control group moderate dysplasia, severe dysplasia and hepatocellular carcinoma were evident at 10th, 20th and 30th week, respectively. Amarogentin was found to prevent progression of liver carcinogenesis at mild dysplastic stage. Exposure to CCl(4)/NDEA resulted in upregulation of ppRb807/811, cyclinD1 and cdc25A at 10th week and additional activation of cMyc and mdm2 along with downregulation of LIMD1, p53 and p21 at 20th week. This was followed by activation of ppRb567 and downregulation of Rbsp3 at 30th week. Prevention of carcinogenesis by amarogentin in both groups might be due to cumulative upregulation of LIMD1, RBSP3, p16 and downregulation of cdc25A at 10th week along with activation of p53 and p21 and downregulation of ppRb807/811 and ppRb567 at 20th week, followed by downregulation of cyclinD1, cMyc and mdm2 at 30th week. During carcinogenesis reduction of apoptosis was evident since 20th week. However, amarogentin treatment could significantly induce apoptosis through upregulation of the Bax-Bcl2 ratio, activation of caspase-3 and poly ADP ribose polymerase cleavage. This is the first report of chemopreventive/therapeutic role of amarogentin during liver carcinogenesis through modulation of cell cycle and apoptosis.


Assuntos
Apoptose/efeitos dos fármacos , Pontos de Checagem do Ciclo Celular/efeitos dos fármacos , Fase G1/efeitos dos fármacos , Iridoides/farmacologia , Neoplasias Hepáticas Experimentais/prevenção & controle , Fase S/efeitos dos fármacos , Animais , Peso Corporal/efeitos dos fármacos , Proliferação de Células , Quimioprevenção , Feminino , Fígado/patologia , Neoplasias Hepáticas Experimentais/mortalidade , Neoplasias Hepáticas Experimentais/patologia , Camundongos , Fosforilação , Proteína do Retinoblastoma/metabolismo
15.
Nat Prod Commun ; 6(5): 625-6, 2011 May.
Artigo em Inglês | MEDLINE | ID: mdl-21615021

RESUMO

The root bark of Pongamia pinnata Pierre (syn P. glabra Vent.) has afforded a new biflavonyloxymethane, pongabiflavone, along with a known furanoflavone, 3-methoxy-(7, 8, 2", 3") furanoflavone. The structure of this new compound was elucidated from extensive spectral studies, including 2D-NMR spectroscopic experiments. The antioxidant, radical quenching activity- superoxide and nitric oxide quenching activities of both pongabiflavone and previously isolated karanjabiflavone have been evaluated which can be a key to cure Psoriasis.


Assuntos
Biflavonoides/isolamento & purificação , Sequestradores de Radicais Livres/isolamento & purificação , Millettia/química , Pongamia/química , Biflavonoides/química , Estrutura Molecular
16.
Nat Prod Commun ; 5(8): 1213-4, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20839621

RESUMO

The root bark of Pongamia pinnata Pierre Syn Pongamia glabra (Family: Fabaceae) has afforded a new biflavonyloxymethane, karanjabiflavone, along with a known furanoflavone, pongapin. The structure of this new biflavonyloxymethane was elucidated from extensive spectral studies including 2D-NMR experiments. Both of these compounds possess antioxidant activity.


Assuntos
Antioxidantes/isolamento & purificação , Flavonas/isolamento & purificação , Millettia/química , Antioxidantes/química , Benzopiranos/isolamento & purificação , Flavonas/química , Espectroscopia de Ressonância Magnética , Casca de Planta/química
17.
Fitoterapia ; 81(1): 72-4, 2010 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-19695314

RESUMO

The bioassay guided fractionation of the n-hexane extract of the seeds of Murraya koenigii Spreng (Rutaceae) resulted in the isolation of three bioactive carbazole alkaloids, kurryam (I), koenimbine (II) and koenine (III). The structures of the compounds were confirmed from their (1)H-, (13)C-, and 2D-NMR spectral data. Of the three compounds (I) and (II) exhibited significant inhibitory activity against castor oil-induced diarrhoea and PGE(2)-induced enteropooling in rats. The compounds also produced a significant reduction in gastrointestinal motility in the charcoal meal test in Wistar rats.


Assuntos
Antidiarreicos/uso terapêutico , Diarreia/tratamento farmacológico , Alcaloides Indólicos/uso terapêutico , Fitoterapia , Rutaceae/química , Animais , Antidiarreicos/isolamento & purificação , Antidiarreicos/farmacologia , Óleo de Rícino , Catárticos , Diarreia/induzido quimicamente , Dinoprostona , Difenoxilato , Avaliação Pré-Clínica de Medicamentos , Feminino , Motilidade Gastrointestinal/efeitos dos fármacos , Alcaloides Indólicos/isolamento & purificação , Alcaloides Indólicos/farmacologia , Masculino , Estrutura Molecular , Ocitócicos , Extratos Vegetais/farmacologia , Extratos Vegetais/uso terapêutico , Ratos , Ratos Wistar , Sementes/química
18.
Nat Prod Commun ; 4(8): 1023-4, 2009 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-19768976

RESUMO

The gum resin of Ferula assafoetida Linn. afforded one new sesquiterpene, asimafoetida 1 and three known sesquiterpenoid coumarins. The structure has been established from extensive 2D NMR spectral studies as 7'-[7-(1R,3S)-5-Hydroxy-6,6-dimethyl-2-methylene-cyclohexyl]-9-methyl-9-pentenyl]oxy]-2H-1-benzopyran-2-one. The other three known compounds are ferulic acid, farnesiferol A and farnesiferol C.


Assuntos
Cumarínicos/análise , Ferula/química , Sesquiterpenos/análise , Espectroscopia de Ressonância Magnética/métodos , Plantas Medicinais/química
19.
Nat Prod Commun ; 4(2): 209-10, 2009 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-19370923

RESUMO

The root bark of Pongamia pinnata Pierre [syn P. glabra (family: Fabaceae)] afforded a new chalcone (karanjapin) and two known flavonoids, a pyranoflavonoid (karanjachromene) and a furanoflavonoid (karanjin) The structure of karanjapin has been established from extensive 2D NMR spectral studies as beta,2'-dihydroxy-a,4'-dimethoxy-3,4-methylenedioxychalcone. Karanjapin and karanjachromene were found to possess significant antioxidant activity. This may play an important role in the pathogenesis of several diseases.


Assuntos
Antioxidantes/química , Chalconas/química , Millettia/química , Estrutura Molecular , Casca de Planta/química , Raízes de Plantas/química
20.
Biol Pharm Bull ; 30(1): 84-90, 2007 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-17202665

RESUMO

Single injection of streptozotocin (STZ) resulted diabetes mellitus which was reflected here by the levels of fasting blood glucose and serum insulin. Moreover, this experimental diabetes also resulted testicular dysfunctions evaluated by count, viability and motility of sperm as well as by the activities of key enzymes for androgen synthesis. Diabetes induced testicular oxidative stress has been indicated here by the monitoring of testicular peroxidase and catalase activities as well as by quantification of TBARS and CD of testis. Testicular glucose was increased and leydig cell nuclear area was decreased in STZ induced diabetes. Treatment of herbal formulated drug named as MTEC consist of aqueous-methanol extract of Musa paradisiaca, Tamarindus indica, Eugenia jambolana and Coccinia indica to streptozotocin induced diabetic rat at the ratio of 2:2:1:1 at the dose of 60 mg/d for two times a day for 14 d resulted a significant protection in fasting blood glucose and serum insulin levels (p<0.05) along with correction of testicular above parameters towards the control level (p<0.05). This herbal formulated drug has no general toxic effects on the body weight, as well as on the activities of serum glutamate and pyruvate transaminases in serum. The results support the validity of this herbal drug for the management of testicular disorders noted in diabetic state.


Assuntos
Diabetes Mellitus Experimental/tratamento farmacológico , Medicamentos de Ervas Chinesas/farmacologia , Hipoglicemiantes/farmacologia , Espermatozoides/efeitos dos fármacos , Doenças Testiculares/prevenção & controle , Testículo/efeitos dos fármacos , 17-Hidroxiesteroide Desidrogenases/metabolismo , 3-Hidroxiesteroide Desidrogenases/metabolismo , Animais , Glicemia/efeitos dos fármacos , Peso Corporal/efeitos dos fármacos , Catalase/metabolismo , Sobrevivência Celular/efeitos dos fármacos , Diabetes Mellitus Experimental/sangue , Diabetes Mellitus Experimental/complicações , Medicamentos de Ervas Chinesas/uso terapêutico , Glucose/metabolismo , Hipoglicemiantes/uso terapêutico , Insulina/sangue , Peroxidação de Lipídeos/efeitos dos fármacos , Masculino , Peroxidase/metabolismo , Ratos , Ratos Wistar , Contagem de Espermatozoides , Motilidade dos Espermatozoides/efeitos dos fármacos , Doenças Testiculares/sangue , Doenças Testiculares/etiologia , Doenças Testiculares/patologia , Doenças Testiculares/fisiopatologia , Testículo/metabolismo , Testículo/patologia , Testículo/fisiopatologia , Testosterona/sangue , Fatores de Tempo
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