Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 97
Filtrar
Mais filtros

Base de dados
Tipo de documento
Intervalo de ano de publicação
1.
J Nat Prod ; 87(4): 1179-1186, 2024 04 26.
Artigo em Inglês | MEDLINE | ID: mdl-38528772

RESUMO

A comprehensive phytochemical investigation of aerial parts obtained from Centaurea sicula L. led to the isolation of 14 terpenoids (1-14) and nine polyphenols (15-23). The sesquiterpenoid group (1-11) included three structural families, namely, elemanolides (1-6), eudesmanolides (7 and 8), and germacranolides (9-11) with four unreported secondary metabolites (5-8), whose structure has been determined by extensive spectroscopic analysis, including 1D/2D NMR, HR-MS, and chemical conversion. Moreover, an unprecedented alkaloid, named siculamide (24), was structurally characterized, and a possible biogenetic origin was postulated. Inspired by the traditional use of the plant and in the frame of ongoing research on compounds with potential activity on metabolic syndrome, all the isolated compounds were evaluated for their stimulation of glucose uptake, disclosing remarkable activity for dihydrocnicin (10) and the lignan salicifoliol (15).


Assuntos
Centaurea , Glucose , Componentes Aéreos da Planta , Componentes Aéreos da Planta/química , Centaurea/química , Estrutura Molecular , Glucose/metabolismo , Terpenos/química , Terpenos/isolamento & purificação , Terpenos/farmacologia , Polifenóis/química , Polifenóis/farmacologia , Sesquiterpenos/química , Sesquiterpenos/farmacologia , Sesquiterpenos/isolamento & purificação
2.
Acta Pharmacol Sin ; 44(11): 2265-2281, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37344563

RESUMO

The majority of blood malignancies is incurable and has unforeseeable remitting-relapsing paths in response to different treatments. Cynaropicrin, a natural sesquiterpene lactone from the edible parts of the artichoke plant, has gained increased attention as a chemotherapeutic agent. In this study, we investigated the effects of cynaropicrin against multiple myeloma (MM) cells in vitro and assessed its in vivo effectiveness in a xenograft tumor zebrafish model. We showed that cynaropicrin exerted potent cytotoxicity against a panel of nine MM cell lines and two leukemia cell lines with AMO1 being the most sensitive cell line (IC50 = 1.8 ± 0.3 µM). Cynaropicrin (0.8, 1.9, 3.6 µM) dose-dependently reduced c-Myc expression and transcriptional activity in AMO1 cells that was associated with significant downregulation of STAT3, AKT, and ERK1/2. Cell cycle analysis showed that cynaropicrin treatment arrested AMO1 cells in the G2M phase along with an increase in the sub-G0G1 phase after 24 h. With prolonged treatment times, cells accumulated more in the sub-G0G1 phase, implying cell death. Using confocal microscopy, we revealed that cynaropicrin disrupted the microtubule network in U2OS cells stably expressing α-tubulin-GFP. Furthermore, we revealed that cynaropicrin promoted DNA damage in AMO1 cells leading to PAR polymer production by PARP1 hyperactivation, resulting in AIF translocation from the mitochondria to the nucleus and subsequently to a novel form of cell death, parthanatos. Finally, we demonstrated that cynaropicrin (5, 10 µM) significantly reduced tumor growth in a T-cell acute lymphoblastic leukemia (T-ALL) xenograft zebrafish model. Taken together, these results demonstrate that cynaropicrin causes potent inhibition of hematopoietic tumor cells in vitro and in vivo.


Assuntos
Mieloma Múltiplo , Parthanatos , Sesquiterpenos , Animais , Humanos , Tubulina (Proteína) , Peixe-Zebra/metabolismo , Mieloma Múltiplo/tratamento farmacológico , Lactonas/farmacologia , Lactonas/uso terapêutico , Sesquiterpenos/farmacologia , Sesquiterpenos/uso terapêutico , Linhagem Celular Tumoral
3.
Mar Drugs ; 21(7)2023 Jun 24.
Artigo em Inglês | MEDLINE | ID: mdl-37504902

RESUMO

Marine compounds represent a varied source of new drugs with potential anticancer effects. Among these, sponges, including those belonging to the Irciniidae family, have been demonstrated to exert cytotoxic effects on different human cancer cells. Here, we investigated, for the first time, the therapeutic effect of an extract (referred as iSP) from the sponge, Ircinia ramosa (Porifera, Dictyoceratida, and Irciniidae), on A375 human melanoma cells. We found that iSP impaired A375 melanoma cells proliferation, induced cell death through caspase-dependent apoptosis and arrested cells in the G1 phase of the cell cycle, as demonstrated via both flow cytometry and qPCR analysis. The proapoptotic effect of iSP is associated with increased ROS production and mitochondrial modulation, as observed by using DCF-DHA and mitochondrial probes. In addition, we performed wound healing, invasion and clonogenic assays and found that iSP was able to restrain A375 migration, invasion and clonogenicity. Importantly, we observed that an iSP treatment modulated the expression of the EMT-associated epithelial markers, E-CAD and N-CAD, unveiling the mechanism underlying the effect of iSP in modulating A375 migration and invasion. Collectively, this study provides the first evidence to support the role of Ircinia ramosa sponge extracts as a potential therapeutic resource for the treatment of human melanoma.


Assuntos
Melanoma , Poríferos , Animais , Humanos , Linhagem Celular Tumoral , Melanoma/tratamento farmacológico , Melanoma/metabolismo , Apoptose , Proliferação de Células , Movimento Celular
4.
Molecules ; 28(21)2023 Nov 05.
Artigo em Inglês | MEDLINE | ID: mdl-37959858

RESUMO

Plants with medicinal benefits are a crucial source of compounds for developing drugs. This study was designed to determine the chemical composition, antibacterial, antibiofilm, antioxidant, and anti-enzymatic activities of Pulicaria incisa (Lam.) DC. We also reported the molecular interaction between identified molecules and several receptors associated with antimicrobial and antibiofilm activities. A total of seventeen and thirteen compounds were identified in aqueous and methanolic extracts of P. incisa, respectively. The methanolic extract yielded a higher total content of polyphenols and flavonoids of about 84.80 ± 2.8 mg GAE/g and 28.30 ± 1.2 mg QE/g, respectively. Significant antibacterial activity was recorded for both extracts, with minimum inhibitory concentration (MIC) values ranging from 30 to 36 µg/mL, and the result was comparable to the reference antibiotic control. Antibiofilm assays revealed that both extracts were able to reduce the attachment of bacterial cells to 96-well plates, but the highest antibiofilm activity was recorded against Staphylococcus aureus. The methanolic extract also showed anti-enzymatic potency and high antioxidant activity, as demonstrated by all assays used, including DPPH, FRAP, and ABTS. These results were further validated by in silico approaches, particularly the molecular interaction of the identified compounds with the targeted receptors. These findings present P. incisa as a significant source of antibacterial, antibiofilm, antioxidant, and anti-enzymatic molecules.


Assuntos
Antioxidantes , Pulicaria , Antioxidantes/química , Extratos Vegetais/farmacologia , Extratos Vegetais/química , Antibacterianos/farmacologia , Compostos Fitoquímicos/farmacologia , Compostos Fitoquímicos/química , Metanol
5.
Phytother Res ; 35(3): 1432-1442, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33058354

RESUMO

Malignant melanoma is the deadliest skin cancer, due to its propensity to metastasize. MAPKs and NF-κB pathways are constitutively activated in melanoma and promote cell proliferation, cell invasion, metastasis formation, and resistance to therapeutic regimens. Thus, they represent potential targets for melanoma prevention and treatment. Phytochemicals are gaining considerable attention for the management of melanoma because of their several cellular and molecular targets. A screening of a small library of sesquiterpenes lactones selected cynaropicrin, isolated from the aerial parts of Centaurea drabifolia subsp. detonsa, for its potential anticancer effect against melanoma cells. Treatment of human melanoma cells A375 with cynaropicrin resulted in inhibition of cell proliferation and induction of caspase-3-dependent apoptosis. Furthermore, cynaropicrin reduced several cellular malignant features such migration, invasion, and colonies formation through the inhibition of ERK1/2 and NF-κB activity. Cynaropicrin was able to reduce intracellular reactive oxygen species generation, which are involved in all the stages of carcinogenesis. Indeed, cynaropicrin increased the expression of several antioxidant genes, such as glutamate-cysteine ligase and heme oxygenase-1, by promoting the activation of the transcription factor Nrf-2. In conclusion, our results individuate cynaropicrin as a potential adjuvant chemotherapeutic agent for melanoma by targeting several protumorigenic signaling pathways.


Assuntos
Lactonas/uso terapêutico , Melanoma/tratamento farmacológico , Quinases de Proteína Quinase Ativadas por Mitógeno/metabolismo , NF-kappa B/metabolismo , Sesquiterpenos/uso terapêutico , Apoptose , Proliferação de Células , Progressão da Doença , Humanos , Lactonas/farmacologia , Sesquiterpenos/farmacologia , Transdução de Sinais
6.
J Nat Prod ; 83(11): 3298-3304, 2020 11 25.
Artigo em Inglês | MEDLINE | ID: mdl-33176095

RESUMO

Bioassay-guided investigation of the Saudi medicinal and edible plant Cissus rotundifolia yielded seven metabolites, including the new sucrose diester cissuxinoside (1) and the unprecedented cissoic acid (2), belonging to unusual classes of secondary metabolites. Their chemical structures were elucidated through a combination of HR-MS and NMR data. The absolute configuration of cissoic acid was assigned by comparison of experimental and TDDFT-calculated electronic circular dichroism spectra. In addition, three rare C-glycosyl flavones (3-5) were fully characterized, and for 3 and 4 NMR data are reported here for the first time. This study identified 1-O-(4-coumaroyl)-ß-d-glucopyranose (7) as the main compound responsible for the glucose uptake stimulation effect exerted by the extract.


Assuntos
Cissus/química , Fenóis/isolamento & purificação , Glicosilação , Estrutura Molecular , Fenóis/química , Análise Espectral/métodos
7.
Bioorg Med Chem ; 26(15): 4532-4536, 2018 08 15.
Artigo em Inglês | MEDLINE | ID: mdl-30077611

RESUMO

Electrophilic attack to a double bond, the classic trigger of intramolecular isoprenoid cyclizations, is apparently silent in Cannabis and the diversity of the cannabinome can be ultimately traced to the oxidative cyclization of cannabigerolic acid (CBGA, 1a), a process triggered by the generation of an aromatic electrophilic species. To expand the chemical space of the cannabinoid chemotype, we have investigated an oxidative trigger based on the addition of iodine to the terminal isoprenyl double bond of cannabigerol (CBG, 1b), the decarboxylated and thermally stable version of CBGA (1a). Apart from the predictable product of an iodine-induced cascade cyclization (3), also a pair of unprecedented spiranes named spirocannabigerols (4a,b), derived from the formation of an edge-protonated cyclopropyl cation was also formed, along with a product (5) resulting from the incorporation, in a Friedel-Craft fashion, of the reaction solvent (toluene). Biological evaluation of these compounds on six thermo-transient receptor potential channels (TRPs) showed a remodeling of bioactivity compared to GBC, with emphasis on TRPA1 rather than TRPM8.


Assuntos
Canabinoides/metabolismo , Iodo/química , Animais , Canabinoides/química , Ciclização , Células HEK293 , Humanos , Concentração Inibidora 50 , Ratos , Canais de Cátion TRPM/antagonistas & inibidores , Canais de Cátion TRPM/metabolismo , Canais de Cátion TRPV/antagonistas & inibidores , Canais de Cátion TRPV/metabolismo
8.
Gynecol Endocrinol ; 34(12): 1016-1018, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29890868

RESUMO

Pheochromocytoma (PH) is a tumor that arises from chromaffin cells of the adrenal medulla. Though being this benign neoplasm very rare in pregnancies, lack of treatment nevertheless causes high mortality rates for both the mother and the fetus. Classic symptoms related to PH are hypertension, abdominal pain, diaphoresis, and headache; but it can be easily misdiagnosed as gestational hypertension or preeclampsia. Its appearance is sporadic, but there are some genetic disorders that favor its onset (e.g. MEN 2A and 2B). Individual management is needed, because no single protocol is suitable in such a complex and rare condition. In this paper we describe our experience in the clinical and surgical management of a young pregnant patient affected by PH, and in particular the specific and unique pharmacological treatment with doxazosin, the use of corticosteroids and a close monitoring of fetal well-being, which proved being an effective approach.


Assuntos
Neoplasias das Glândulas Suprarrenais/diagnóstico , Feocromocitoma/diagnóstico , Complicações Neoplásicas na Gravidez/diagnóstico , Adulto , Feminino , Humanos , Gravidez
9.
J Nat Prod ; 80(10): 2787-2794, 2017 10 27.
Artigo em Inglês | MEDLINE | ID: mdl-28976194

RESUMO

Phytochemical investigation of the aerial parts of the Tunisian plant Daucus virgatus led to the isolation of eight new germacranolides named daucovirgolides A-H (1-8). The stereostructures of these sesquiterpene lactones, decorated by either one or two angeloyl groups, have been determined by a combination of MS, NMR spectroscopy, chemical derivatization, and comparison of experimental electronic circular dichroism curves with TDDFT-predicted data. Daucovirgolide G (7) proved to be the single member of this family to possess a marked inhibitory activity (92% at 50 µg/mL) on the development of Plasmodium early sporogonic stages, the nonpathogenic transmissible stages of malaria parasites, devoid of general cytotoxicity. The selective activity of daucovirgolide G points to the existence of strict structural requirements for this transmission-blocking activity and therefore of a well-defined, although yet unidentified, biological target.


Assuntos
Antimaláricos/isolamento & purificação , Antimaláricos/farmacologia , Apiaceae/química , Componentes Aéreos da Planta/química , Sesquiterpenos de Germacrano/isolamento & purificação , Sesquiterpenos de Germacrano/farmacologia , Antimaláricos/química , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Plasmodium/efeitos dos fármacos , Sesquiterpenos de Germacrano/química , Tunísia
10.
Planta Med ; 82(9-10): 761-6, 2016 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-27002390

RESUMO

Transient receptor potential channels and cannabinoid receptors are deputed to the regulation of sensory, homeostatic, and inflammatory events in the human organism. Therefore, their modulation promises to have relevant applications in important therapeutic areas such as inflammation, pain, and cancer. This review summarizes the contribution of marine research in this relatively young field, highlighting the potential of the chemodiversity carried by marine natural products in the discovery of new ligands.


Assuntos
Produtos Biológicos/farmacologia , Receptores de Canabinoides/efeitos dos fármacos , Canais de Potencial de Receptor Transitório/efeitos dos fármacos , Animais , Antozoários/química , Organismos Aquáticos , Cianobactérias/química , Fungos/química , Humanos , Poríferos/química
11.
Int Urogynecol J ; 26(9): 1253-68, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-25990203

RESUMO

INTRODUCTION AND HYPOTHESIS: Questions regarding the long-term efficacy and safety of midurethral slings (MUS) are still unresolved, notwithstanding the widespread use of these procedures. The objective of this review was to evaluate the long-term outcomes of retropubic MUS (RP-MUS) procedures and the medium-term outcomes of transobturator MUS (TO-MUS) procedures. METHODS: MEDLINE, EMBASE, NLH, ClinicalTrials.gov, and Google Scholar databases were searched up to June 2014 with restriction to English language and using the search terms: "stress urinary incontinence", "midurethral sling", "tension-free tape", "transobturator tape", and "follow-up". Studies with a follow-up of 36 months for TO-MUS and 60 months for RP-MUS were searched. Only studies comparing a RP-MUS or TO-MUS with another synthetic sling were included. Data from 49 studies were included. Data were expressed as odds ratios (OR) with 95 % confidence intervals (CI) and combined using the Mantel-Haenszel fixed effects model. Differences in the proportions were evaluated using the chi-squared test. RESULTS: RP-MUS had similar objective cure rates (OR 1.15, 95 % CI 0.75 - 1.76) but higher subjective cure rates than TO-MUS (OR 1.76, 95 % CI 1.08 - 2.86). No differences were observed between outside-in (TOT) and inside-out (TVT-O) and between TO-MUS and minisling. Bladder injuries were more frequent (OR 7.01, 95 % CI 2.94 - 17.90) and vaginal erosions were less frequent for RP-MUS (OR 0.24, 95 % CI 0.07 - 0.84). Vaginal injuries were more common with TOT than with TVT-O (OR 7.96, 95 % CI 1.15 - 157.9). Pain-related complications were more common with TO-MUS than with minimally invasive tapes (OR 8.75; 95 % CI 9.02 - 57.90). CONCLUSIONS: MUS have similar objective cure rates in the long term and medium term. TO-MUS is associated with a lower subjective cure rate than RP-MUS.


Assuntos
Slings Suburetrais/estatística & dados numéricos , Incontinência Urinária por Estresse/cirurgia , Feminino , Humanos , Ensaios Clínicos Controlados Aleatórios como Assunto , Slings Suburetrais/efeitos adversos , Resultado do Tratamento
12.
Molecules ; 20(1): 1571-8, 2015 Jan 16.
Artigo em Inglês | MEDLINE | ID: mdl-25603502

RESUMO

The petroleum ether extract of Magydaris tomentosa flowers (Desf.) W. D. J. Koch has been analyzed by GC-MS. It is mainly constituted by furanocoumarins such as xanthotoxin, xanthotoxol, isopimpinellin, and bergaptene. Other coumarins such as 7-methoxy-8-(2-formyl-2-methylpropyl) coumarin and osthole also occurred. The antiproliferative activity of Magydaris tomentosa flower extract has been evaluated in vitro on murine monocye/macrophages (J774A.1), human melanoma (A375) and human breast cancer (MCF-7) tumor cell lines, showing a major activity against the latter.


Assuntos
Alcanos/química , Apiaceae/química , Extratos Vegetais/farmacologia , Animais , Morte Celular/efeitos dos fármacos , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Cumarínicos/química , Flores/química , Cromatografia Gasosa-Espectrometria de Massas , Humanos , Camundongos
13.
Arch Gynecol Obstet ; 290(2): 283-9, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24599566

RESUMO

PURPOSE: To evaluate the effect of a protocol of local anesthesia and epinephrine associated with sedo-analgesia on post-TVT-O pain in comparison with infiltration of saline and epinephrine. METHODS: Forty-two patients undergoing TVT-O were randomized into two groups to receive periurethral infiltration with epinephrine only (group A, n = 21) or with epinephrine plus 1 % lidocaine hydrochloride (group B, n = 21). Post-operative pain was assessed using a visual analog scale (VAS) from 0 (absence of pain) to 10 (maximum pain possible), 1, 6, 12 and 24 h after the procedure. The total amount of analgesia was recorded and the proportion of women reporting a pain VAS score ≥4, 1 h after the procedure was calculated. ANOVA for repeated measures and Bonferroni correction, the Student's t test for independent samples, the Mann-Whitney U test, the Fisher exact test, or the χ (2) test for parametric was used. RESULTS: Pain level was significantly lower in group B 1 (p = 0.01) and 6 h (p = 0.05) after surgery, but not 12 and 24 h after the procedure. No significant difference was observed in the proportion of women requesting analgesia and in the total dosage of analgesics between the two groups. A significant higher proportion of women in group A reported a pain VAS score higher than four 1 h after surgery in comparison with patients in group B. CONCLUSIONS: This randomized study seems to indicate that systematic infiltration before TVT-O positioning with local anesthetic may reduce immediate post-operative pain.


Assuntos
Analgesia/métodos , Anestesia Local/métodos , Dor Pós-Operatória/tratamento farmacológico , Slings Suburetrais , Incontinência Urinária por Estresse/cirurgia , Analgésicos/administração & dosagem , Anestésicos Locais/administração & dosagem , Método Duplo-Cego , Vias de Administração de Medicamentos , Epinefrina/administração & dosagem , Feminino , Humanos , Lidocaína/administração & dosagem , Pessoa de Meia-Idade , Manejo da Dor , Medição da Dor , Placebos , Resultado do Tratamento
14.
Front Plant Sci ; 15: 1293184, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38559761

RESUMO

Phytocannabinoids represent the hallmark of the secondary metabolism of Cannabis sativa. The content of major phytocannabinoids is closely related to genetic variation as well as abiotic elicitors such as temperature, drought, and saline stress. The present study aims to evaluate hemp response to saline irrigation supplied as NaCl solutions with an electrical conductivity (EC) of 2.0, 4.0, and 6.0 dS m-1 (S1, S2, and S3, respectively) compared to a tap water control (S0). In addition, the potential beneficial effect of a plant-based biostimulant (a legume protein hydrolysate) in mitigating the detrimental effects of saline irrigation on crop growth and phytocannabinoid composition was investigated. Sodium chloride saline irrigation significantly reduced biomass production only with S2 and S3 treatments, in accordance with an induced nutrient imbalance, as evidenced by the mineral profile of leaves. Multivariate analysis revealed that the phytocannabinoid composition, both in inflorescences and leaves, was affected by the salinity level of the irrigation water. Interestingly, higher salinity levels (S2-S3) resulted in the predominance of cannabidiol (CBD), compared to lower salinity ones (S0-S1). Plant growth and nitrogen uptake were significantly increased by the biostimulant application, with significant mitigation of the detrimental effect of saline irrigations.

15.
J Minim Invasive Gynecol ; 20(2): 198-204, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23352582

RESUMO

OBJECTIVE: To compare the efficacy of the inside-out tension-free vaginal tape-obturator (TVT-O) device versus the single-incision TVT-Secur device 36 months after the procedure. METHODS: A single-blind, randomized, parallel-group study on 154 patients with stress urinary incontinence (77 treated with TVT-O and 77 with the TVT-Secur hammock approach). The primary endpoint was the objective cure rate 36 months after the procedure evaluated with the challenge stress test. Secondary endpoints were subjective cure rate (evaluated with bladder diary, quality-of-life questionnaires, and patient-reported outcome tools) and intraoperative and postoperative complications. The primary endpoint was evaluated with a noninferiority study design. RESULTS: Sixty-six patients in the TVT-O group and 64 in the TVT-Secur group concluded the study. Thirty-six months after the procedure, 57/66 patients (86.4%) in the TVT-O and 50/64 (78.1%) in the TVT-Secur groups were objectively cured (noninferiority unilateral u test: p < .05). No differences were observed in the subjective cure and complication rates. CONCLUSIONS: TVT-Secur seems not to be inferior to TVT-O in the surgical treatment of stress urinary incontinence and causes less postoperative pain. The possibility of severe blood loss cannot be ruled out when TVT-Secur is used.


Assuntos
Slings Suburetrais , Incontinência Urinária por Estresse/cirurgia , Idoso , Perda Sanguínea Cirúrgica , Feminino , Seguimentos , Humanos , Pessoa de Meia-Idade , Dor Pós-Operatória/etiologia , Qualidade de Vida , Método Simples-Cego , Slings Suburetrais/efeitos adversos , Inquéritos e Questionários , Resultado do Tratamento
16.
J Obstet Gynaecol Res ; 39(2): 608-10, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-22925452

RESUMO

In recent years, surgical treatment of stress urinary incontinence has become minimally invasive owing to the introduction of the transobturator route first and then single incision devices for positioning of mid-urethral slings. Although a number of case reports in the literature describe pregnancies successfully terminated both by vaginal delivery and cesarean section following mid-urethral sling positioning, there is still no definitive consensus on which is the preferred mode of delivery in these patients. We report a case of spontaneous vaginal delivery at term in a 41-year-old multiparous woman two years after the positioning of a single incision sling (TVT-Secur). The patient remained continent throughout the gestation and in the following 24 months. This case seems to further support the concept that sling procedures for stress urinary incontinence do not represent an absolute contraindication to spontaneous vaginal delivery, although the preferred mode of delivery must be assessed on an individual basis.


Assuntos
Complicações do Trabalho de Parto/prevenção & controle , Complicações Pós-Operatórias/prevenção & controle , Incontinência Urinária por Estresse/cirurgia , Adulto , Feminino , Humanos , Gravidez , Telas Cirúrgicas/efeitos adversos , Nascimento a Termo , Resultado do Tratamento
17.
Plants (Basel) ; 12(9)2023 May 02.
Artigo em Inglês | MEDLINE | ID: mdl-37176926

RESUMO

The rhizosphere is a rich source of actinomycetes which can produce several potential biologically active secondary metabolites. The principal goal for this research is to extract, purify, and characterize the bioactive secondary metabolites produced by three different strains of actinomycetes isolated from the rhizosphere of rosemary, black locust, and olive. The plant growth-promoting effect (PGPE) of the studied strains of actinomycetes on Ocimum basilicum L. (basil) and the disease-control effect on necrotic stem lesions of "black leg" caused by Fusarium tabacinum on basil were evaluated in silico. The cell-free culture filtrates from the studied actinomycetes isolates were evaluated in vitro for their antimicrobial activity against some common phytopathogens. The secondary metabolites obtained from the cell-free culture filtrates have been chemically characterized using high-resolution electrospray ionization of liquid-chromatography/mass-spectrometric detection (ESI-(HR)Orbitrap-MS). Results of the in silico trial showed that all studied isolates demonstrated PGPE on basil seedlings, improved some eco-physiological characteristics, and reduced the disease incidence of F. tabacinum. The extracted metabolites from the studied actinomycetes demonstrated antimicrobial activity in a Petri-plates assay. The chemical analysis revealed the presence of 20 different components. This research emphasizes how valuable the examined isolates are for producing bioactive compounds, indicating their putative antimicrobial activity and their potential employment as fungal biocontrol agents. In particular, the obtained results revealed the possibility of green synthesis of some important secondary metabolites, such as N-Acetyl-l-histidinol, Rhizocticin A, and Eponemycin, from actinomycetes. The bioactive metabolites may be successively used to develop novel bio-formulations for both crop protection and/or PGPE.

18.
J Ethnopharmacol ; 311: 116391, 2023 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-36948263

RESUMO

ETHNOPHARMACOLOGICAL RELEVANCE: Chamomile (M. chamomilla L.) is an herbaceous plant from family Astereaceae, that has a long history of use in traditional medicine. It has been used as herbal remedies for thousands of years to treat several diseases, including infections, neuropsychiatric, respiratory, gastrointestinal, and liver disorders. Chronic inflammation is involved in the pathogenesis of most infectious and non-infectious diseases and macrophages are considered the major cellular players that drive disease initiation and maintenance. AIM OF THE STUDY: The aim of this study was to evaluate the variation in the chemical profile of the essential oil of M. chamomilla plants collected in three experimental field sites in the Molise region. Additionally, we evaluated the pharmacological mechanism behind the anti-inflammatory effect of M. chamomilla essential oils. MATERIAL AND METHODS: Three essential oils (called GC1, GC2 and GC3) were extracted from aerial parts of M. chamomilla by hydrodistillation and chemical composition was analyzed by gas chromatography-mass spectrometry (GC-MS). The essential oils were tested for their ability to modulate pro-inflammatory murine macrophages and human peripheral blood mononuclear cells (PBMCs) functions. RESULTS: The chemical analysis of the samples revealed the presence of a high content of the oxygenated sesquiterpenes that represented more than the half of the entire oils. GC1, GC2 and GC3 essential oils significantly attenuated LPS/IFN-γ-induced inflammation by reducing M1 polarization. In details, they showed significant anti-inflammatory property by inhibiting NO, TNF-α and IL-6 production. These effects were correlated to a suppression of LPS-mediated p65 activation, the critical transactivation subunit for NF-κB transcription factor. Oxidative stress may trigger macrophages activation and elicit strong immune responses. Our study demonstrated that GC1, GC2 and GC3 were highly effective at increasing GCL and HMOX-1 anti-oxidant enzymes expression leading to the rapid scavenging of ROS. The antioxidant activity of these oils was explained throughout the activation of NRF2 signaling pathway. Next, we demonstrated that essential oils were able to reduce CD4+ T cell activation which are also involved in inflammatory processes. CONCLUSIONS: Our data describe for the first time that chamomile essential oils exerted their anti-inflammatory and antioxidant activity by modulating macrophages and CD4+ T cells-mediate immune response.


Assuntos
Óleos Voláteis , Humanos , Animais , Camundongos , Óleos Voláteis/farmacologia , Óleos Voláteis/uso terapêutico , Óleos Voláteis/análise , Camomila , Leucócitos Mononucleares , Antioxidantes/farmacologia , Lipopolissacarídeos/farmacologia , Lipopolissacarídeos/metabolismo , Cromatografia Gasosa-Espectrometria de Massas , Macrófagos , Anti-Inflamatórios/farmacologia , Anti-Inflamatórios/uso terapêutico , Anti-Inflamatórios/análise , Inflamação/tratamento farmacológico
19.
Plants (Basel) ; 12(6)2023 Mar 07.
Artigo em Inglês | MEDLINE | ID: mdl-36986909

RESUMO

Andrographis paniculata is widely used as a traditional medicine in Asian countries. It has been classified as a safe and non-toxic medicine by traditional Chinese medicine. The investigation of the biological activities of A. paniculata is still focused on the crude extract and isolation of its main active compound, andrographolide, and its derivatives. However, the use of andrographolide alone has been shown to exacerbate unwanted effects. This highlights the importance of developing a fraction of A. paniculata with enhanced efficacy as an herbal-based medicine. In this study, the extraction and fractionation of A. paniculata, followed by quantitative analysis using high-performance liquid chromatography coupled with a DAD detector, were established to quantify the andrographolide and its derivative in each fraction. Biological activities, such as antioxidant, anticancer, antihypertensive, and anti-inflammatory activities, were evaluated to study their correlations with the quantification of active substances of A. paniculata extract and its fractions. The 50% methanolic fraction of A. paniculata exhibited the best cytotoxic activities against CACO-2 cells, as well as the best anti-inflammatory and antihypertensive activities compared to other extracts. The 50% methanolic fraction also displayed the highest quantification of its main active compound, andrographolide, and its derivatives, 14-deoxy-11,12-didehydroandrographolide, neoandrographolide, and andrograpanin, among others.

20.
Antioxidants (Basel) ; 12(8)2023 Aug 18.
Artigo em Inglês | MEDLINE | ID: mdl-37627628

RESUMO

Rosmarinus officinalis L. is an aromatic evergreen plant from the Lamiaceae family. The purpose of this study was to compare the chemical profile and bioactivities of hydroalcoholic extracts derived from wild and cultivated R. officinalis. The chemical composition of the extracts was evaluated via LC-MS analysis, which revealed the presence of a wide range of phenolic compounds, including flavonoids, phenolic and terpenes. Both extracts showed a similar interesting antioxidant activity, probably related to their content of phenol and flavonoids. The analysis of anti-acetylcholinesterase (AChE), anti-butyrylcholinesterase (BChE), and anti-α-amylase activities showed analogous inhibition, except for AChE, in which the wild type was more active than the cultivated one. Finally, in vitro studies were performed using the J774A.1 murine macrophage cell line, to characterize the anti-inflammatory and the antioxidant effects of the extracts. As expected, pretreatment with the extracts significantly reduced the production proinflammatory cytokines and ROS through modulation of the nitric oxide pathway and the mitochondrial activity. Importantly, it is observed that the anti-inflammatory effect of the extracts was explicated through the inhibition of NF-kB and its downstream mediator COX-2. Collectively, these results demonstrated that these extracts could represent a starting point for developing novel therapeutic strategies for the treatment of inflammation-based diseases. Moreover, since no significant changes were observed in terms of composition and activity, both wild and cultivated R. officinalis extracts can be recommended for food and pharmaceutical purposes.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA