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1.
Nutrients ; 15(20)2023 Oct 16.
Artigo em Inglês | MEDLINE | ID: mdl-37892456

RESUMO

Respiratory viral infections continue to pose significant challenges, particularly for more susceptible and immunocompromised individuals. Nutraceutical strategies have been proposed as promising strategies to mitigate their impact and improve public health. In the present study, we developed a mixture of two hydroalcoholic extracts from the aerial parts of Echinacea purpurea (L.) Moench (ECP) and the cones of Humulus lupulus L. (HOP) that can be harnessed in the prevention and treatment of viral respiratory diseases. The ECP/HOP mixture (named ECHOPvir) was characterized for the antioxidant and cytoprotective properties in airway cells. Moreover, the immunomodulating properties of the mixture in murine macrophages against antioxidant and inflammatory stimuli and its antiviral efficacy against the PR8/H1N1 influenza virus were assayed. The modulation of the Nrf2 was also investigated as a mechanistic hypothesis. The ECP/HOP mixture showed a promising multitarget bioactivity profile, with combined cytoprotective, antioxidant, immunomodulating and antiviral activities, likely due to the peculiar phytocomplexes of both ECP and HOP, and often potentiated the effect of the single extracts. The Nrf2 activation seemed to trigger these cytoprotective properties and suggest a possible usefulness in counteracting the damage caused by different stressors, including viral infection. Further studies may strengthen the interest in this product and underpin its future nutraceutical applications.


Assuntos
Echinacea , Humulus , Vírus da Influenza A Subtipo H1N1 , Humanos , Animais , Camundongos , Antioxidantes/farmacologia , Fator 2 Relacionado a NF-E2 , Extratos Vegetais/farmacologia , Antivirais/farmacologia
2.
Antioxidants (Basel) ; 12(9)2023 Sep 16.
Artigo em Inglês | MEDLINE | ID: mdl-37760074

RESUMO

Overweight and obesity prevalence has increased worldwide. Apart from conventional approaches, people also resort to botanical supplements for reducing body weight, although several adverse events have been associated with these products. In this context, the present study aimed at evaluating the toxicity of Garcinia cambogia-based products and shedding light on the mechanisms involved. The suspected hepatotoxic reactions related to G. cambogia-containing products collected within the Italian Phytovigilance System (IPS) were examined. Then, an in vitro study was performed to evaluate the possible mechanisms responsible for the liver toxicity, focusing on the modulation of oxidative stress and Nrf2 expression. From March 2002 to March 2022, the IPS collected eight reports of hepatic adverse reactions related to G. cambogia, which exclusively involved women and were mostly severe. The causality assessment was probable in three cases, while it was possible in five. In the in vitro experiments, a low cytotoxicity of G. cambogia was observed. However, its combination with montelukast greatly reduced cell viability, increased the intracellular ROS levels, and affected the cytoplasmic Nrf2 expression, thus suggesting an impairment of the antioxidant and cytoprotective defenses. Overall, our results support the safety concerns about G. cambogia-containing supplements and shed light on the possible mechanisms underpinning its hepatotoxicity.

4.
Biomedicines ; 10(9)2022 Sep 12.
Artigo em Inglês | MEDLINE | ID: mdl-36140359

RESUMO

Exposure to cigarette smoke (CS) has been associated with an increased risk of fatal breast cancers and recurrence, along with chemoresistance and chemotherapy impairment. This strengthens the interest in chemopreventive agents to be exploited both in healthy and oncological subjects to prevent or repair CS damage. In the present study, we evaluated the chemopreventive properties of the natural sesquiterpene ß-caryophyllene towards the damage induced by cigarette smoke condensate (CSC) in triple negative breast cancer MDA-MB-468 cells. Particularly, we assessed the ability of the sesquiterpene to interfere with the mechanisms exploited by CSC to promote cell survival and chemoresistance, including genomic instability, cell cycle progress, autophagy/apoptosis, cell migration and related pathways. ß-Caryophyllene was found to be able to increase the CSC-induced death of MDA-MB-468 cells, likely triggering oxidative stress, cell cycle arrest and apoptosis; moreover, it hindered cell recovery, autophagy activation and cell migration; at last, a marked inhibition of the signal transducer and activator of transcription 3 (STAT3) activation was highlighted: this could represent a key mechanism of the chemoprevention by ß-caryophyllene. Although further studies are required to confirm the in vivo efficacy of ß-caryophyllene, the present results suggest a novel strategy to reduce the harmful effect of smoke in cancer patients and to improve the survival expectations in breast cancer women.

5.
Nutrients ; 14(18)2022 Sep 08.
Artigo em Inglês | MEDLINE | ID: mdl-36145084

RESUMO

Alzheimer's disease (AD) is a progressive degenerative disorder of the central nervous system, characterized by neuroinflammation, neurotransmitter deficits, and neurodegeneration, which finally leads to neuronal death. Emerging evidence highlighted that hyperglycemia and brain insulin resistance represent risk factors for AD development, thus suggesting the existence of an additional AD form, associated with glucose metabolism impairment, named type 3 diabetes. Owing to the limited pharmacological options, novel strategies, especially dietary approaches based on the consumption of polyphenols, have been addressed to prevent or, at least, slow down AD progression. Among polyphenols, ferulic acid is a hydroxycinnamic acid derivative, widely distributed in nature, especially in cereal bran and fruits, and known to be endowed with many bioactivities, especially antioxidant, anti-inflammatory and antidiabetic, thus suggesting it could be exploited as a possible novel neuroprotective strategy. Considering the importance of ferulic acid as a bioactive molecule and its widespread distribution in foods and medicinal plants, the aim of the present narrative review is to provide an overview on the existing preclinical and clinical evidence about the neuroprotective properties and mechanisms of action of ferulic acid, also focusing on its ability to modulate glucose homeostasis, in order to support a further therapeutic interest for AD and type 3 diabetes.


Assuntos
Doença de Alzheimer , Diabetes Mellitus , Fármacos Neuroprotetores , Doença de Alzheimer/tratamento farmacológico , Doença de Alzheimer/metabolismo , Doença de Alzheimer/prevenção & controle , Antioxidantes/farmacologia , Antioxidantes/uso terapêutico , Ácidos Cumáricos/farmacologia , Ácidos Cumáricos/uso terapêutico , Diabetes Mellitus/tratamento farmacológico , Glucose/metabolismo , Humanos , Hipoglicemiantes/uso terapêutico , Fármacos Neuroprotetores/metabolismo , Fármacos Neuroprotetores/farmacologia , Fármacos Neuroprotetores/uso terapêutico
6.
Nutrients ; 14(15)2022 Jul 30.
Artigo em Inglês | MEDLINE | ID: mdl-35956325

RESUMO

Green-tea-based products and their polyphenols, especially epigallocatechin-3-gallate, have attracted great attention over the years as possible nutraceuticals, due to their promising bioactivities, especially antioxidant and anti-inflammatory, which could be exploited in several diseases, including skin ailments. In this context, the present study aimed at reviewing clinical evidence about the benefits of the oral administration of green tea preparations and its polyphenols to relieve skin disorders, to point out the current knowledge, and to suggest possible novel strategies to effectively exploit the properties of green tea, also managing safety risks. To this end, a systematic review of the existing literature was carried out, using the PRISMA method. Few studies, including five focused on UV-induced erythema and skin alterations, three on photoaging, two on antioxidant skin defenses, and one on acne and genodermatosis, were retrieved. Despite several benefits, clinical evidence only supports the use of oral green tea preparations to protect skin from damage induced by ultraviolet radiation; in other cases, conflicting results and methodological limits of clinical trials do not allow one to clarify their efficacy. Therefore, their application as adjuvant or alternative sunscreen-protective interventions could be encouraged, in compliance with the safety recommendations.


Assuntos
Camellia sinensis , Catequina , Antioxidantes/farmacologia , Catequina/efeitos adversos , Polifenóis/efeitos adversos , Pele , Chá , Raios Ultravioleta/efeitos adversos
7.
Ann Ist Super Sanita ; 58(2): 131-138, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35722800

RESUMO

INTRODUCTION: Products containing anthraquinones (AQ) are associated with an increased risk of serious adverse events (AEs). We performed an update of the available evidence retrieved by the spontaneous reports of AE associated with herbal dietary supplement (DS) and over-the-counter medications (OTC-M) used as laxatives. METHODS: Analysis and evaluation of AE reports retrieved from the Italian Phytovigilance and Pharmacovigilance systems was performed from February 2011 to December 2020. RESULTS: Totally 110 AE reports, 24 related to herbal DS and 86 to OTC-M, were analyzed. Most subjects were females. Herbal products analyzed mostly contained AQ derivatives. Most AEs were gastrointestinal (41.6%), central nervous system (18.2%), and dermatological disorders (12.6%). CONCLUSIONS: The number of AE reports recorded in the last 10 years is still relatively low. However, given the seriousness of some AEs, that does not represent a guarantee of safety. This study may contribute to enhance public awareness on the risks associated with misuse or abuse of laxatives.


Assuntos
Laxantes , Farmacovigilância , Sistemas de Notificação de Reações Adversas a Medicamentos , Suplementos Nutricionais/efeitos adversos , Feminino , Humanos , Itália/epidemiologia , Laxantes/efeitos adversos , Masculino
8.
Molecules ; 27(3)2022 Jan 21.
Artigo em Inglês | MEDLINE | ID: mdl-35163958

RESUMO

In the present study, the phytochemical composition and bioactivities of A. maroccanus (AM) and A. radiatus (AR), two ecotypes collected in the Demnate road and Essaouira regions, respectively, were studied to highlight a pharmacological interest and to enable possible pharmaceutical development. To this end, methanolic and ethyl acetate extracts were prepared for each ecotype by fractionation; next, their phytochemical composition was evaluated by spectrophotometric and chromatographic analysis. Moreover, in line with the available evidence for Anacyclus spp. and their traditional use, a screening of bioactivities, including antioxidant, hypoglycemic, antiglycative, chelating, and antibacterial activities, was performed. The extracts were characterized by high amounts of polyphenols, tannins, and flavonoids, especially in the methanolic extracts; these samples were also enriched in carotenoids despite a lower chlorophyll content. Chlorogenic acid and rutin were the major identified compounds. The extracts also showed interesting hypoglycemic, antiglycative, and antibacterial properties, although with differences in efficacy and potency. Present results provide more scientific basis to the ethnopharmacological uses of Anacyclus spp. and suggest a further interest in AM and AR ecotypes as natural sources of bioactive compounds and/or phytocomplexes for possible pharmaceutical and nutraceutical developments.


Assuntos
Asteraceae/genética , Asteraceae/metabolismo , Compostos Fitoquímicos/análise , Antibacterianos/farmacologia , Antioxidantes/química , Asteraceae/efeitos dos fármacos , Flavonoides/análise , Testes de Sensibilidade Microbiana , Marrocos , Componentes Aéreos da Planta/química , Extratos Vegetais/química , Polifenóis/química , Taninos
9.
Phytother Res ; 36(3): 1093-1102, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-35040201

RESUMO

This systematic review and meta-analysis were conducted to determine the effects of anthraquinone (AQ) laxatives on colorectal cancer (CRC). We searched PubMed, Embase, Google Scholar, and CENTRAL from inception until March 2021, for randomized controlled trials (RCTs) and observational studies. Through the systematic review, we identified 8 observational studies evaluating AQ laxatives use as a risk factor for CRC development, and 5 studies on CRC risk were included in the meta-analysis using a random-effects model. Through the meta-analysis, we found that a history of AQ laxatives use compared with "other" and "no laxatives" use was associated with CRC development (OR: 1.41; 95% CI: 0.94-2.11), although not at a statistically significant level. The possible association persists even after removal of the outlier studies (OR: 1.51; 95% CI: 0.97-2.34). Selection of cases and controls was judged at low or unclear risk of bias across almost all studies, and the quality of evidence was from moderate to low. In conclusion, it is not possible to associate the use of AQ laxatives with the development of CRC. However, the trend toward an increased risk of CRC provides a strong indication for investigating this issue by performing further high-quality studies.


Assuntos
Neoplasias Colorretais , Laxantes , Antraquinonas/uso terapêutico , Neoplasias Colorretais/tratamento farmacológico , Neoplasias Colorretais/epidemiologia , Constipação Intestinal/tratamento farmacológico , Humanos , Laxantes/uso terapêutico
10.
Phytother Res ; 35(6): 3246-3261, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-33569860

RESUMO

Herbal tonic and adaptogens are often used to improve overall well-being. However, few clinical evidence supports their use and their safety is not known before marketing. In this context, the aim of our study was to analyze the spontaneous reports of suspected adverse reactions (ARs) to performance enhancing herbal dietary supplements collected by the Italian Phytovigilance System. Between March 2002 and September 2020, 110 spontaneous reports were collected, 58 of which related to products containing botanicals, alone or in association. Twenty-three serious reactions were reported, 21 of which required hospitalization, one was life-threatening and another caused disability. Dermatological and cardiovascular reactions were the most frequent. Hepatic ARs were the most serious (9 out of 10). A positive dechallenge was indicated in 69% of cases, while a positive rechallenge occurred in 15%. Concomitant use of other products was present in 18 reports (31%), while predisposing conditions were indicated in 17 (29%). Present data highlight safety concerns on herbal dietary supplements used as cognitive and physical performance enhancers, mainly due to their quality and use without expert supervision. Considering that postmarketing surveillance is not required for these products, spontaneous reports represent the only tool to point out risks related to food supplements.


Assuntos
Suplementos Nutricionais/efeitos adversos , Substâncias para Melhoria do Desempenho/efeitos adversos , Humanos , Itália/epidemiologia , Farmacovigilância
11.
Clin Nutr ; 40(3): 1176-1185, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-32778460

RESUMO

BACKGROUND & AIMS: Alpha-lipoic acid (ALA)-containing dietary supplements are widely used in clinical practice, although their safety assessment is under-investigated. We characterize the safety profile of ALA-containing products by analysing spontaneous reports of suspected adverse reactions (ARs). METHODS: Suspected ARs to ALA-containing products were extracted from the Italian Phytovigilance System (IPS), and scrutinized in terms of seriousness and causality (through WHO UMC system), with a specific focus on important (IMEs) and designated medical events (DMEs). To characterize the reporting profile from an international perspective, the WHO-VigiBase was also queried. RESULTS: From March 2002 to February 2020, out of 2147 total reports, 116 reports concerning 212 ARs to ALA-containing products were collected. Women were involved in 68.1% of cases. Skin (44.9%) and gastrointestinal disorders (10.8%) were the most frequently represented ARs. Causality assessment resulted as definite (15), probable (35), possible (24), unlikely (5), and unclassifiable (37). In 70% of cases, events occurred within 30 days of ALA use. Forty-five reports were serious (38.8%), being insulin autoimmune syndrome the most frequently reported (N = 10). IMEs were recorded in 20 cases, including four DMEs (3 angioedema and one anaphylactic shock). Similar distribution emerged from the 5641 reports in the WHO-VigiBase. CONCLUSIONS: The remarkable reporting of unpredictable skin, immune and hepatic ARs, coupled with seriousness, strong causality and early onset, calls for a) careful risk-benefit assessment of ALA-containing products by regulators; b) awareness and monitoring by clinicians and c) continuous vigilance of their safety profile through valuable spontaneous reporting systems such as IPS.


Assuntos
Sistemas de Notificação de Reações Adversas a Medicamentos/estatística & dados numéricos , Suplementos Nutricionais/efeitos adversos , Toxidermias/etiologia , Gastroenteropatias/induzido quimicamente , Ácido Tióctico/efeitos adversos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Causalidade , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Farmacovigilância , Estudos Retrospectivos , Medição de Risco , Adulto Jovem
12.
Ann Ist Super Sanita ; 56(4): 462-469, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33346172

RESUMO

INTRODUCTION: Turmeric is the common name for the rhizome of Curcuma longa L. In the recent years, food supplements containing turmeric have been marketed and widely used by an increasing number of consumers. Spontaneous reports of suspected adverse reactions to food supplements are collected within the Phytovigilance system. METHODS: An ad hoc multidisciplinary group investigated the suspected cases of hepatotoxicity reported to the Italian Phytovigilance system associated with the assumption of turmeric food supplements with the methodology specific to pharmacovigilance as well as for the evaluation of the quality and safety of food supplements. RESULTS: A cluster of 28 spontaneous reports of acute hepatitis, mostly with cholestasis, associated with turmeric products were sent to the Italian Phytovigilance system in the first six months of 2019. In all cases, except one, the causality assessment was at least possible. The suspected products were collected and analysed for the presence of drugs, heavy metals, aflatoxins, pesticides, synthetic dyes and pyrrolizidine alkaloids. CONCLUSION: On the basis of the results of all the activities performed by multidisciplinary group, regulatory intervention was taken. This study highlights the importance of developing an integrated evaluation approach for the evaluation of the adverse effects associated with the use of food supplements.


Assuntos
Doença Hepática Induzida por Substâncias e Drogas/etiologia , Curcuma/efeitos adversos , Suplementos Nutricionais/efeitos adversos , Extratos Vegetais/efeitos adversos , Adulto , Idoso , Feminino , Humanos , Itália , Masculino , Pessoa de Meia-Idade
14.
Cancers (Basel) ; 12(10)2020 Oct 18.
Artigo em Inglês | MEDLINE | ID: mdl-33081075

RESUMO

Chemoprevention is referred to as a strategy to inhibit, suppress, or reverse tumor development and progression in healthy people along with high-risk subjects and oncologic patients through using pharmacological or natural substances. Numerous phytochemicals have been widely described in the literature to possess chemopreventive properties, although their clinical usefulness remains to be defined. Among them, caryophyllane sesquiterpenes are natural compounds widely occurring in nature kingdoms, especially in plants, fungi, and marine environments. Several structures, characterized by a common caryophyllane skeleton with further rearrangements, have been identified, but those isolated from plant essential oils, including ß-caryophyllene, ß-caryophyllene oxide, α-humulene, and isocaryophyllene, have attracted the greatest pharmacological attention. Emerging evidence has outlined a complex polypharmacological profile of caryophyllane sesquiterpenes characterized by blocking, suppressing, chemosensitizing, and cytoprotective properties, which suggests a possible usefulness of these natural substances in cancer chemoprevention for both preventive and adjuvant purposes. In the present review, the scientific knowledge about the chemopreventive properties of caryophyllane sesquiterpenes and the mechanisms involved have been collected and discussed; moreover, possible structure-activity relationships have been highlighted. Although further high-quality studies are required, the promising preclinical findings and the safe pharmacological profile encourage further studies to define a clinical usefulness of caryophyllane sesquiterpenes in primary, secondary, or tertiary chemoprevention.

15.
Cells ; 9(4)2020 04 02.
Artigo em Inglês | MEDLINE | ID: mdl-32252311

RESUMO

Cholangiocarcinoma (CCA) is an aggressive group of biliary tract cancers, characterized by late diagnosis, low effective chemotherapies, multidrug resistance, and poor outcomes. In the attempt to identify new therapeutic strategies for CCA, we studied the antiproliferative activity of a combination between doxorubicin and the natural sesquiterpene ß-caryophyllene in cholangiocarcinoma Mz-ChA-1 cells and nonmalignant H69 cholangiocytes, under both long-term and metronomic schedules. The modulation of STAT3 signaling, oxidative stress, DNA damage response, cell cycle progression and apoptosis was investigated as possible mechanisms of action. ß-caryophyllene was able to synergize the cytotoxicity of low dose doxorubicin in Mz-ChA-1 cells, while producing cytoprotective effects in H69 cholangiocytes, mainly after a long-term exposure of 24 h. The mechanistic analysis highlighted that the sesquiterpene induced a cell cycle arrest in G2/M phase along with the doxorubicin-induced accumulation in S phase, reduced the γH2AX and GSH levels without affecting GSSG. ROS amount was partly lowered by the combination in Mz-ChA-1 cells, while increased in H69 cells. A lowered expression of doxorubicin-induced STAT3 activation was found in the presence of ß-caryophyllene in both cancer and normal cholangiocytes. These networking effects resulted in an increased apoptosis rate in Mz-ChA-1 cells, despite a lowering in H69 cholangiocytes. This evidence highlighted a possible role of STAT3 as a final effector of a complex network regulated by ß-caryophyllene, which leads to an enhanced doxorubicin-sensitivity of cholangiocarcinoma cells and a lowered chemotherapy toxicity in nonmalignant cholangiocytes, thus strengthening the interest for this natural sesquiterpene as a dual-acting chemosensitizing and chemopreventive agent.


Assuntos
Quimioprevenção/métodos , Colangiocarcinoma/tratamento farmacológico , Doxorrubicina/uso terapêutico , Sesquiterpenos Policíclicos/metabolismo , Fator de Transcrição STAT3/metabolismo , Pontos de Checagem do Ciclo Celular/efeitos dos fármacos , Colangiocarcinoma/patologia , Doxorrubicina/farmacologia , Humanos , Estrutura Molecular , Oxirredução , Transdução de Sinais
16.
Int J Mol Sci ; 21(2)2020 Jan 17.
Artigo em Inglês | MEDLINE | ID: mdl-31963614

RESUMO

Doxorubicin represents a valuable choice for different cancers, although the severe side effects occurring at the high effective dose limits its clinical use. In the present study, potential strategies to potentiate low-dose doxorubicin efficacy, including a metronomic schedule, characterized by a short and repeated exposure to the anticancer drug, and the combination with the natural chemosensitizing sesquiterpenes ß-caryophyllene and ß-caryophyllene oxide, were assessed in human hepatoma HepG2 cells. The involvement of P-glycoprotein (P-gp) in the HepG2-chemosensitization to doxorubicin was evaluated. Also, the direct interaction of caryophyllene sesquiterpenes with P-gp was characterized by molecular docking and dynamic simulation studies. A metronomic schedule allowed us to enhance the low-dose doxorubicin cytotoxicity and the combination with caryophyllane sesquiterpenes further potentiated this effect. Also, an increased intracellular accumulation of doxorubicin and rhodamine 123 induced by caryophyllane sesquiterpenes was found, thus suggesting their interference with P-gp function. A lowered expression of P-gp induced by the combinations, with respect to doxorubicin alone, was observed too. Docking studies found that the binding site of caryophyllane sesquiterpene was next to the ATP binding domain of P-gp and that ß-caryophyllene possessed the stronger binding affinity and higher inhibition potential calculated by MM-PBSA. Present findings strengthen our hypothesis about the potential chemosensitizing power of caryophyllane sesquiterpenes and suggest that combining a chemosensitizer and a metronomic schedule can represent a suitable strategy to overcome drawbacks of doxorubicin chemotherapy while exploiting its powerful activity.


Assuntos
Membro 1 da Subfamília B de Cassetes de Ligação de ATP/metabolismo , Apoptose , Carcinoma Hepatocelular/patologia , Doxorrubicina/farmacologia , Neoplasias Hepáticas/patologia , Sesquiterpenos Policíclicos/química , Sesquiterpenos/química , Membro 1 da Subfamília B de Cassetes de Ligação de ATP/genética , Antibióticos Antineoplásicos/farmacologia , Carcinoma Hepatocelular/tratamento farmacológico , Carcinoma Hepatocelular/metabolismo , Simulação por Computador , Relação Dose-Resposta a Droga , Humanos , Técnicas In Vitro , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Hepáticas/metabolismo , Células Tumorais Cultivadas
17.
Molecules ; 24(17)2019 Aug 27.
Artigo em Inglês | MEDLINE | ID: mdl-31461832

RESUMO

Pomegranate peel is a natural source of phenolics, claimed to possess healing properties, among which are antioxidant and antidiabetic. In the present study, an ethyl acetate extract, obtained by Soxhlet from the peel of Dente di Cavallo DC2 pomegranate (PGE) and characterized to contain 4% w/w of ellagic acid, has been evaluated for its hypoglycemic, antiglycation, and antioxidative cytoprotective properties, in order to provide possible evidence for future nutraceutical applications. The α-amylase and α-glucosidase enzyme inhibition, interference with advanced glycation end-products (AGE) formation, and metal chelating abilities were studied. Moreover, the possible antioxidant cytoprotective properties of PGE under hyperglycemic conditions were assayed. Phenolic profile of the extract was characterized by integrated chromatographic and spectrophotometric methods. PGE resulted able to strongly inhibit the tested enzymes, especially α-glucosidase, and exerted chelating and antiglycation properties. Also, it counteracted the intracellular oxidative stress under hyperglycemic conditions, by reducing the levels of reactive oxygen species and total glutathione. Among the identified phenolics, rutin was the most abundant flavonoid (about 4 % w/w). Present results suggest PGE to be a possible remedy for hyperglycemia management and encourage further studies to exploit its promising properties.


Assuntos
Antioxidantes/química , Hipoglicemiantes/química , Fenóis/química , Punica granatum/química , Antioxidantes/farmacologia , Linhagem Celular , Cromatografia Líquida de Alta Pressão , Glutationa/metabolismo , Inibidores de Glicosídeo Hidrolases/química , Inibidores de Glicosídeo Hidrolases/farmacologia , Humanos , Hipoglicemiantes/farmacologia , Fenóis/farmacologia , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Espécies Reativas de Oxigênio/metabolismo , Rutina/química , Rutina/farmacologia , alfa-Amilases/antagonistas & inibidores
18.
Eur J Clin Pharmacol ; 75(11): 1599-1615, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31428816

RESUMO

PURPOSE: Overweight and obesity represent worldwide a rising health problem. In this context, dietary supplements and herbal preparations are often used as self-medication for weight loss. The aim of this study was to describe the safety profile of dietary supplements for weight control by analyzing spontaneous reports of suspected adverse reactions (ARs) received by the Italian Phytovigilance System, from July 2010 to October 2017. METHODS: The suspected ARs were collected using an ad hoc reporting form, registered in a database at the National Institute of Health and evaluated by a multidisciplinary group of experts. The causality assessment was performed using the WHO-UMC system or the CIOMS/RUCAM score. In case of serious adverse reactions, a feedback is provided to the reporter by e-mail. RESULTS: Sixty-six spontaneous reports were collected. ARs involved cardiovascular system (26%), liver (14%), central nervous system (12%), skin (9%), gastrointestinal system (17%), thyroid (8%), kidney (4%), and other organs/systems (10%). In 64% of cases, the reaction was serious. Dechallenge was positive in 46 cases; three cases of positive rechallenge were reported. After the causality assessment, the association between the product intake and the adverse reaction was judged as possible in the majority of the cases (n = 43; 65%). CONCLUSIONS: The data collected confirmed the existence of safety concerns on herbal dietary supplements used for body weight control, mainly related to quality of products and their use as self-medication. In this scenario, spontaneous reports represent the only tools available to monitor safety of these products.


Assuntos
Suplementos Nutricionais/efeitos adversos , Preparações de Plantas/efeitos adversos , Adolescente , Adulto , Sistemas de Notificação de Reações Adversas a Medicamentos , Idoso , Idoso de 80 Anos ou mais , Criança , Feminino , Humanos , Itália , Masculino , Pessoa de Meia-Idade , Redução de Peso , Adulto Jovem
19.
Arch Toxicol ; 93(3): 623-634, 2019 03.
Artigo em Inglês | MEDLINE | ID: mdl-30659321

RESUMO

Several ATP-binding cassette (ABC) proteins reduce intracellular concentrations of antitumor drugs and hence weaken the response of cancer cells to chemotherapy. Accordingly, the inhibition of these export pumps constitutes a promising strategy to chemosensitize highly chemoresistant tumors, such as hepatocellular carcinoma (HCC). Here, we have investigated the ability of ß-caryophyllene oxide (CRYO), a naturally occurring sesquiterpene component of many essential oils, to inhibit, at non-toxic doses, ABC pumps and improve the response of HCC cells to sorafenib. First, we have obtained a clonal subline (Alexander/R) derived from human hepatoma cells with enhanced multidrug resistance (MDR) associated to up-regulation (mRNA and protein) of MRP1 and MRP2. Analysis of fluorescent substrates export (flow cytometry) revealed that CRYO did not affect the efflux of fluorescein (MRP3, MRP4 and MRP5) but inhibited that of rhodamine 123 (MDR1) and calcein (MRP1 and MRP2). This ability was higher for CRYO than for other sesquiterpenes assayed. CRYO also inhibited sorafenib efflux, increased its intracellular accumulation (HPLC-MS/MS) and enhanced its cytotoxic response (MTT). For comparison, the effect of known ABC pumps inhibitors was also determined. They induced strong (diclofenac on MRPs), modest (verapamil on MDR1) or null (fumitremorgin C on BCRP) effect on sorafenib efflux and cytotoxicity. In the mouse xenograft model, the response to sorafenib treatment of subcutaneous tumors generated by mouse hepatoma Hepa 1-6/R cells, with marked MDR phenotype, was significantly enhanced by CRYO co-administration. In conclusion, at non-toxic dose, CRYO is able to chemosensitizating liver cancer cells to sorafenib by favoring its intracellular accumulation.


Assuntos
Antineoplásicos/toxicidade , Resistencia a Medicamentos Antineoplásicos/efeitos dos fármacos , Sesquiterpenos Policíclicos/metabolismo , Sorafenibe/toxicidade , Transportadores de Cassetes de Ligação de ATP/metabolismo , Animais , Carcinoma Hepatocelular , Linhagem Celular Tumoral , Resistência a Múltiplos Medicamentos , Humanos , Neoplasias Hepáticas , Camundongos , Proteínas de Neoplasias
20.
Pharmaceutics ; 10(4)2018 Dec 13.
Artigo em Inglês | MEDLINE | ID: mdl-30551617

RESUMO

The natural sesquiterpene ß-caryophyllene (CRY) has been highlighted to possess interesting pharmacological potentials, particularly due to its chemopreventive and analgesic properties. However, the poor solubility of this sesquiterpene in aqueous fluids can hinder its uptake into cells, resulting in inconstant responses of biological systems, thus limiting its application. Therefore, identifying a suitable pharmaceutical form for increasing CRY bioavailability represents an important requirement for exploiting its pharmacological potential. In the present study, the ability of soybean phosphatidylcholine (SPC) liposomes to improve bioavailability and absorption of CRY in cancer cells has been evaluated. Liposomal formulations of CRY, differing for lamellarity (i.e., unilamellar and multilamellar vesicles or ULV and MLV) and for the drug loading (i.e., 1:0.1, 1:0.3 and 1:0.5 mol/mol between SPC and CRY) were designed with the aim of maximizing CRY amount in the liposome bilayer, while avoiding its leakage during storage. The low-loaded formulations significantly potentiated the antiproliferative activity of CRY in both HepG2 and MDA-MB-468 cells, reaching a maximum IC50 lowering (from two to five folds) with 1:0.3 and 1:0.1 SPC/CRY MLV. Conversely, increasing liposome drug-loading reduced the ability for CRY release, likely due to a possible interaction between SPC and CRY that affects the membrane properties, as confirmed by physical measures.

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