Investigating the anti-growth, anti-resistance, and anti-virulence activities of Schoepfia schreberi J.F.Gmel. against the superbug Acinetobacter baumannii.

Schoepfia schreberi has been used in Mayan folk medicine to treat diarrhea and cough. This study aimed to determine the anti-growth, anti-resistance, and/or anti-virulence activities of S. schreberi extracts against Acinetobacter baumannii, a pathogen leader that causes healthcare-associated infections with high rates of drug-resistant including carbapenems, the last line of antibiotics known as superbugs, and analyze their composition using HPLC-DAD. Ethyl acetate (SSB-3) and methanol (SSB-4) bark extracts exhibit antimicrobial and biocidal effects against drug-susceptible and drug-resistant A. baumannii. Chemical analysis revealed that SSB-3 and SSB-4 contained of gallic and ellagic acids derivatives. The anti-resistance activity of the extracts revealed that SSB-3 or SSB-4, combined with imipenem, exhibited potent antibiotic reversal activity against A. baumannii by acting as pump efflux modulators. The extracts also displayed activity against surface motility of A. baumannii and its capacity to survive reactive oxygen species. This study suggests that S. schreberi can be considered a source of antibiotics, even adjuvanted compounds, as anti-resistant or anti-virulence agents against A. baumannii, contributing to ethnopharmacological knowledge and reappraisal of Mayan medicinal flora, and supporting the traditional use of the bark of the medicinal plant S. schreberi for the treatment of infectious diseases.

Dodonaea viscosa (Sapindaceae) as a phytoremediator for soils contaminated by heavy metals in abandoned mines.

Dodonaea viscosa (L.) Jacq. is a plant with a wide distribution that expands throughout almost all Mexican territory and is used in traditional medicine to treat many ailments. This species has been found associated with polluted areas, including mine tailings. Huautla, Morelos, Mexico, was a metallurgic district where mining activities generated 780,000 tons of waste rich in metals, deposited at 500 m from the town without any treatment; this situation has been related to different environmental threats and human health risks. The study was carried out for 18 months on seedlings developed under greenhouse conditions in two treatments: control substrate and mine tailings substrate. The concentration of six metals (Cd, Cr, Cu, Fe, Pb, and Zn) was measured through atomic absorption spectrophotometry in plant tissues, roots, and leaves. Effects of metal exposure were analyzed by size, micro-morphological character changes, and genetic damage in foliar tissue using the comet assay. The results showed significantly higher metal concentrations in the roots and leaves of individuals growing on the mine tailing substrate in comparison to the same plants tissues growing on control substrate. Positive and significant relationships between exposure time and metal concentration in roots and leaves, and between metal bioaccumulation in leaves and genetic damage were registered. Four out of six micro-morphological and size characters evaluated decreased significantly in exposed plants, except for stomatic index and root biomass. The most important metals in terms of the number of significantly affected micro-morphological and size characters showed the next pattern: Fe > Cd = Cr = Pb > Cu > Zn. D. viscosa is an efficient accumulator of Cu, Cd, Fe, Pb, and Zn in its root and leaf tissues. Overall, metal translocation factors in exposed D. viscosa plants showed the following pattern: Zn > Cu > Cd. We conclude that D. viscosa has the potential to phytoextract (Zn, Cu, and Cd), and phytostabilize (Cu, Cd, Fe, Pb, and Zn) metals from polluted soils, and along with its abundance, natural establishment in mine tailings, high levels of metal translocation, and bioconcentration factors, without affecting plant development, it can be an ideal candidate for phytoremediation of metal polluted soils.

Inhibitory effect of Mexican oregano (Lippia graveolens Kunth) extracts on digestive enzymes in vitro, and beneficial impact on carbohydrates and lipids absorption in vivo.

ETHNOPHARMACOLOGICAL RELEVANCE: Although Mexican oregano inhibits digestive enzymes in vitro its effect on the absorption of carbohydrates and lipids in vivo has not been addressed. AIM OF THE STUDY: Assess the effect of Mexican oregano (Lippia graveolens Kunth) on carbohydrates and lipids absorption in vivo. The antioxidant activity also was investigated. MATERIALS AND METHODS: Enzymatic inhibitory action of lipase, α-amylase, and α-glucosidase was evaluated in vitro. Oral lipid (OLTT) and starch tolerance tests (OSTT) were conducted with L. graveolens acetone (O-A) and ethanol (O-E) extracts (at 102 mg/kg body weight equivalent to a 1 g human doses) in male Wistar rats. The antioxidant activity was evaluated through inhibition of lipid peroxidation and scavenging radical. RESULTS: Both extracts exhibited higher inhibitory median concentration (IC50) of lipase activity (1.9 µg/µL for O-E and 1.8 µg/µL for O-A) than the positive control (Orlistat) (0.07 µg/µL). The IC50 of α-amylase was higher (41.8 µg/µL for O-E and 25.2 µg/µL for O-A) than the Acarbose (2.5 µg/µL); while α-glucosidase results showed not statistically differences between groups (∼1.7 µg/µL). The OLTT results showed that both extracts significantly reduced serum triglycerides (∼147 mg/dL for O-E and ∼155 mg/dL for O-A) as compared with negative control group (only lipid load). In the OSTT, glucose levels showed a significant decrease (∼31 mg/dL for O-E and ∼17 mg/dL for O-A) than the negative control group (only starch load). About in vitro antioxidant evaluation, not statistically differences between extracts and positive control (Trolox) were observed for scavenged free radicals (∼2.0 µg/µL); whereas O-A inhibited lipid peroxidation similar to the Trolox (∼0.8 µg/µL IC50). The main chemical composition of both extracts was coumaric acid, luteolin, rutinoside, naringenin, and carvacrol. CONCLUSIONS: Both extracts reduce lipid absorption; whereas O-E decreases carbohydrate absorption in vivo. Both extracts inhibit lipid peroxidation and scavenging free radicals in vitro.

GLUT4 translocation in C2C12 myoblasts and primary mouse hepatocytes by an antihyperglycemic flavone from Tillandsia usneoides.

BACKGROUND: Type 2 Diabetes (T2D) is characterized by deregulation in carbohydrate and lipid metabolism, with a very high mortality rate. Glucose Transporter type 4 (GLUT4) plays a crucial role in T2D and represents a therapeutic target of interest. Tillandsia usneoides (T. usneoides) is a plant used as a remedy for diabetes. T. usneoides decreased blood glucose in different experimental models. However, the involvement of GLUT4 in this effect has not yet been explored. PURPOSE: This study aimed to investigate whether any component in T. usneoides might participate in the effect on blood glucose through a bioassay-guided fractionation, testing its potential antihyperglycemic effect in mice, as well as its influence on GLUT4 translocation in C2C12 myoblasts and primary hepatocytes. METHODS: The aqueous extract and the Ethyl Acetate fraction (TU-AcOEt) of T. usneoides were evaluated in a hypoglycemic activity bioassay and in the glucose tolerance test in CD-1 mice. TU-AcOEt was fractionated, obtaining five fractions that were studied in an additional glucose tolerance test. C1F3 was fractioned again, and its fractions (C2F9-12, C2F22-25, and C2F38-44) were examined by HPLC. The C2F38-44 fraction was analyzed by Mass Spectrometry (MS) and subjected to additional fractionation. The fraction C3F6-9 was explored by Nuclear Magnetic Resonance (NMR), resulting in 5,7,4´-trihydroxy-3,6,3´,5´-tetramethoxyflavone (Flav1). Subsequently, a viability test was performed to evaluate the cytotoxic effect of Flav1 and fractions C2F9-12, C2F22-25. C2F38-44, and C3F30-41 in C2C12 myoblasts and primary mouse hepatocytes. Confocal microscopy was also performed to assess the effect of Flav1 and fractions on GLUT4 translocation. RESULTS: The TU-AcOEt fraction exhibited a hypoglycemic and antihyperglycemic effect in mice, and its fractionation resulted in five fractions, among which fraction C1F3 decreased blood glucose. MS and NMR analysis revealed the presence of Flav1. Finally, Flav1 significantly promoted the translocation of GLUT4 in C2C12 myoblasts and primary hepatocytes. CONCLUSION: To date, Flav1 has not been reported to have activity in GLUT4; this study provides evidence that T. usneoides is a plant with the potential to develop novel therapeutic agents for the control of T2D.

Data of the effects of acetone fraction from Sechium edule (Jacq.) S.w. edible roots in the kidney of endothelial dysfunction induced mice.

Endothelial dysfunction induced by Angiotensin II (AG II) plays an important role in the pathogenesis of hypertension and is accompanied by a prooxidative condition, which in turn induces an inflammatory state, vascular remodeling, and tissue damage including the kidney (Schmitt and Dirsch, 2009) [1]. New drugs that can control several of these pathologies are required. Sechium edule has been reported to possess antioxidant, anti-inflammatory and antihypertensive activity (Ibarra-Alvarado et al., 2010) [2]. This paper contains data complementary to those published in Journal of Ethnopharmacology (Moreno et al., 2018) [3], evaluating the effect in kidney of hypertensive mice of the acetone fraction from S. edule to control de pro-oxidative state, reduction of the inflammatory adhesion molecule (ICAM) and recruitment of inflammatory cells.

Exploratory study on the effectiveness of a standardized extract from Ageratina pichinchensis in patients with chronic venous leg ulcers.

The aerial parts of the species Ageratina pichinchensis, popularly known as "axihuitl", have been empirically used in Mexico for wound-healing purposes. The evaluation of an extract from A. pichinchensis (in an in vivo model) demonstrated its capacity to reduce, in a significant manner, the time required for wound healing in rodent skin. This same extract showed (in vitro) a capacity of encouraging proliferation of normal human fetal lung fibroblasts (MRC-5). This study's objective was to evaluate, in a clinical trial, the effectiveness and tolerability of the topical administration of a product elaborated with the standardized extract from the aerial parts of A. pichinchensis in patients with chronic venous leg ulcers, and to compare the effect with a control group treated with 7 % propylene glycol alginate. In this study, a total of 34 patients were included (50 % in each group). Six patients of the control group withdrew from the treatment, three of these because of lack of recovery. In the experimental group, 2 participants withdrew from the study, but none of these due to treatment or clinical-evolution reasons. The A. pichinchensis extract showed therapeutic effectiveness in one hundred percent of the patients treated with it, while the control treatment achieved this condition in 81.8 % of the control group patients. Ulcer size reduction resulted significantly higher (p < 0.010) in the group of patients administered the experimental treatment, which allows us to assure that the A. pichinchensis standardized extract is effective in the treatment of chronic venous leg ulcers and, compared with the 7 % propylene glycol alginate formula, achieves a significant reduction of the time required for the ulcers to heal.

Effect on the wound healing process and in vitro cell proliferation by the medicinal Mexican plant Ageratina pichinchensis.

The species Ageratina pichinchensis (Asteraceae) has been used for a long time in Mexican traditional medicine for the treatment of different skin conditions and injuries. In this study, the healing capacity of the plant extracts obtained was evaluated and, in order to understand the mechanism of healing, we also analyzed its effect on cell proliferation IN VITRO, cytotoxicity, and skin irritation. Different extracts obtained from the aerial parts of A. pichinchensis, topically administrated, were evaluated in a healing model by scalpel-blade incision on the rat. The extracts, at 10 % concentrations, were administrated daily during an eight-day period. A control group, to which the vehicle was administered, was used; while fibrinolysin (Fibrase SA®) was administered for positive control purposes. Reduction in wound size and the histological characteristics of the skin at the end of the treatment were evaluated. Cytotoxicity was evaluated in cell lines KB (nasopharyngeal carcinoma), UISO (squamous cell carcinoma of the cervix), OVCAR (ovarian carcinoma), and HCT-15 (colon carcinoma). In addition, the effect on cell proliferation of cell line MRC-5 (normal cells from human fetal lung) was measured, and skin irritation was evaluated. The results showed an important healing capacity of A. pichinchensis extract in noninfected wounds; the aqueous extract was found to be the most efficient. The extracts exhibited no cytotoxic effect; however, there was an effect that promoted cell proliferation in cell line MRC-5. The products tested demonstrated no skin irritant effects.

Interés de la flor de hibisco en problemas cardiovasculares / Interest of Hibiscus sabdariffa on cardiovascular diseases

El hibisco (Hibiscus sabdariffa) es una especie vegetal usada desdehace siglos por diversas culturas con fines culinarios. Popularmentese le han atribuido propiedades diuréticas, antihipertensivas, antiparasitariasy laxantes, pero en los últimos veinte años una serie detrabajos han demostrado la actividad antihipertensiva, hipolipemiantey antioxidante de sus cálices y calículos (flor de hibisco). Los extractosricos en flavonoides y antocianósidos ejercen una notable actividadantihipertensiva al inhibir la enzima convertidora de la angiotensina(ECA). También se sugiere que los efectos relajantes sobre el músculoliso de los vasos sanguíneos están relacionados con la activación de laNO-sintasa. Por otro lado, una serie de compuestos antioxidantes deesta especie, entre los que figura el ácido protocatéquico, inhiben deforma dosis-dependiente la oxidación de las LDL, lo que otorga a estaespecie una actividad hipolipemiante. Estudios in vivo y clínicos handemostrado una disminución de colesterol y triglicéridos séricos(AU)

Roselle (Hibiscus sabdariffa) is a plant species used forcenturies by several cultures for cooking. Diuretic, antihypertensive,antiparasitic and laxative properties have beenattributed in folk medicine. In the last twenty years, severalresearch works have demonstrated antihypertensive,hypolipidemic and antioxidant effects of their calyces andepicalycles. Extracts rich in flavonoids and anthocyanosidesexert a remarcable important antihypertensive activityby inhibiting the angiotensin converting enzyme (ACE). It isalso suggested that the relaxant effects on smooth muscleof blood vessels are associated with the activation ofthe NO-synthase. Furthermore, a number of antioxidantscompounds of this species, such as protocatechuic acid,inhibited LDL oxidation in a dose-dependent manner, whichgives this species a hypolipidemic activity. In vivo and clinicalstudies have shown a decrease in serum cholesteroland triglycerides(AU)

Effectiveness and tolerability of a standardized extract from Ageratina pichinchensis on patients with tinea pedis: an explorative pilot study controlled with ketoconazole.

Ageratina pichinchensis has been used for many years in Mexican traditional medicine for the treatment of superficial mycosis. Previous studies have demonstrated the antifungal effectiveness of a hexane extract from aerial parts of this plant on in vitro cultures of Candida albicans, Aspergillium niger, Trichophyton mentagrophytes, and Trichophyton rubrum. To compare the effectiveness and tolerability of A. pichinchensis with ketoconazole in patients with the clinical and mycological diagnosis of tinea pedis, we carried out a double-blind pilot study. The experimental group was treated topically with a cream containing A. pichinchensis standardized extract (10 %), while the control group was administered a similarly colored cream containing 2 % ketoconazole. All patients were clinically followed weekly for 4 weeks. By means of a mycological examination (direct microscopic detection), the mycological diagnosis of tinea pedis was performed. This technique was also used for evaluating the mycological effectiveness at the end of treatment. A total of 120 patients were included, 60 in each treatment group. Of these, 97 patients were included in the statistical analysis, 51 from the experimental group and 46 controls. The remainder of the patients withdrew from the study due to non-medical causes. Clinical effectiveness was reached in 80.3 and 76 %, while therapeutic success was achieved in 80.3 and 71.7 % of the experimental and control groups, respectively. There were no statistical differences between groups (P = 0.31). Our results suggest the effectiveness and tolerability of a standardized extract from A. pichinchensis in treatment of patients with tinea pedis.