Green Synthesis of Mn + Cu Bimetallic Nanoparticles Using Vinca rosea Extract and Their Antioxidant, Antibacterial, and Catalytic Activities

This article outlines the preparation of manganese-doped copper nanoparticles (Mn + Cu NPs) using Vinca rosea (L.) leaf extract as a convenient and environmentally friendly substance. UV–vis, FT–IR, XRD, SEM–EDAX, and DLS instrumental techniques were employed to describe the physical and chemical properties of synthesized V. rosea extract-mediated Vr-Mn + Cu NPs. The synthesized Vr-Mn + Cu NPs were observed to be monodispersed and spherical, with an average size of 412 nm. The plant extract includes a variety of phytochemical components. The Vr-Mn + Cu NPs also have potential antioxidant and antibacterial properties against selected pathogens. The green synthesized Vr-Mn + Cu NPs showed a maximum inhibition zone of 16.33 ± 0.57 mm against E. coli. For dye degradation, MR, EBT, and MO showed the highest degradation percentage capabilities with Vr-Mn + Cu NP-based adsorbents, which were determined to be 78.54 ± 0.16, 87.67 ± 0.06, and 69.79 ± 0.36. The results clearly show that biosynthesized Vr-Mn + Cu NPs may be employed as an antioxidant, antibacterial, photocatalytic dye degradation, and catalytic agent, as well as being ecologically benign.

Phytochemical and Pharmacological Properties of Catharanthus roseus (Vinca)

Vinca alkaloids obtained from Madagascar are a subset of drugs. Generally, they are naturally extracted from the Vinca rosea plant, Catharanthus roseus G, Don and show hyperglycemia activity as well as cytotoxic effects. It is used to treat various diseases such as diabetes, hypertension, cancer, asthma, inflammation, malaria, angiogenesis, brain imbalance, dysentery, and is also used as a disinfectant that occurs due to potent microorganisms. The vinca alkaloids are played an essential role to fight cancer disease. There are some major vinca alkaloids in clinical use: Vinblastin, Vincristine, Vindesine, tabersonine, vinorelbine, and Vinpocetine, etc. The flowers juice of Vinca rosea is utilized to treat several skin problems e.g. acne, eczema, and dermatitis. According to our opinion that it may be help scientists, ayurvedic practitioners, pharmacognosists, botanists, researchers, and students who are active in the field of medicinal plants research.

Evaluation of Antidiabetic Activity of a Novel Polyherbal Preparationagainst Streptozotocin Induced Diabetes Rat Model

Background: Diabetes Mellitus is a chronic disorder characterised by abnormally elevated glucose levels in the blood. Diabetes is caused by one of two mechanisms: insufficient insulin synthesis (which is produced by the pancreas and reduces blood glucose) or insufficient response of cells to insulin action. The current aim of this research project was to formulate and evaluate the Polyherbal preparation (PHP) of the plants constituted with Cinnamonum zeylanicium (CJ) bark, Eugenia jambolana (EJ) seeds, Vinca rosea (VR) whole plant, Gymnema sylvestre (GS) leaves and determination of the anti-diabetic potential of the formulation in the animal model induced by Streptozotocin. Methods: Plant components in the current study used were Cinnamonum zeylanicium (CJ) bark, Eugenia jambolana (EJ) seeds, Vinca rosea (VR) whole plant, Gymnema sylvestre (GS) leaves were collected.Using a hydroalcoholic solvent, physico-chemical parameters and active chemical constituents were evaluated. The active components present in the extracts were identified by Preliminary phytochemical screening. The PHP acute toxicity analysis was conducted in compliance with OECD Guideline 423, with 200 mg/kg and 4000 mg/kg administered orally to rats over 28 days. Results: Diabetes was induced by STZ and treated with PHF did not show any alterations in behavior and no mortality was observed up to the 2000 mg/kg dose level during the interventional period. By oral administration of PHP with a dosage of 200 and 400 mg/kg, OGTT resulted in a steady decrease in blood glucose levels of 68.74±4.63 mg/dl and 63.83±1.74 mg/dl at 180min after the trial which proves that PHP possess anti-diabetic activity. By mixing each extract in varying proportions, PHP was developed and evaluated. PHP (200 and 400mg/kg) antidiabetic activity wasdetermined for streptozotocin (STZ)-induced diabetes in rats and glibenclamide (5.0mg/kg body weight) was used as a standard drug.The investigational drug was administered for 28 days and the blood glucose level effect of the PHP was analysed on the 28th day after the intervention time. Conclusion: The experimental study showed that a persistent and substantial decrease in the average blood glucose level of diabetic rats was observed with repeated administration of PHP and glibenclamide for 28 days. PHP demonstrated substantial antidiabetic and antihyperlipidemic activity similar to the standard drug. The formulation will emerge as a possible mixture that may challenge the synthetic drug.

Nano-Niosomal Formulation of Alkaloids from Vinca rosea for Improved Oral Delivery

Phytochemicals, the natural biochemical substances produced by plants possess a range of medicinal values. These phytochemicals get into our system through food and bring different physiological benefits. However, many of these phytochemicals lack essential physicochemical properties that can provide them effective drug-likeness properties. Vinca rosea alkaloids are known for their therapeutic values especially in the cancer treatment domain. However, the physiochemical properties of these molecules limit their bioavailability greatly. This current research aimed at improving the bioavailability of Vinca rosea alkaloids through the nanovector system, niosomes. Vinca alkaloids were extracted, purified, screened and quantified. Niosomal constructs of the alkaloids were made, characterized through scanning electron microscope and ex-vivo studies were carried out using goat intestine. The size of the niosomes was found to be in the range of 400 to 800 nm. Results shows that niosomal formulation can increase bioavailability of Vinca rosea alkaloids two folds compared to the native alkaloid extract.

Effet Antihyperglycémiant des Extraits Aqueux et Méthanoliques des Feuilles de Vinca rosea Chez les Cobayes

Cette étude a été menée dans le but de déterminer l’effet antihyperglycémiant des extraits aqueux et méthanoliques des feuilles de Vinca rosea sur les cobayes. Les expériences ont été menées sur des cobayes diabétiques (induction par injection d’une dose unique dans la veine pénienne de 65 mg/kg de streptozotocine après injection intrapéritonéale du nicotinamide à la dose de 110 mg/kg). 14 jours après induction du diabète, les cobayes considérés diabétiques ont été répartis en 4 lots de 6 cobayes chacun recevant 4 types de traitements, quotidiennement en dose unique à l’aide d’une sonde œsophagienne. Les résultats ont révélé que l’administration orale des extraits aqueux et méthanoliques des feuilles de Vinca rosea entraînaient une diminution de la glycémie (p < 0.05), de manière similaire à l’action antidiabétique de la molécule de référence : Captopril (60 mg/kg). Des études plus avancées restent recommandées pour approfondir non seulement les connaissances sur les différents flavonoïdes pourvus de cette activité mais aussi pour cerner d’une manière plus fine, les différents mécanismes d’actions possibles de ces composés.

Effects of various carbohydrates on the in vitro pollen germination of Vinca rosea and Cucumis melo var. utilissimus

Pollen germination is crucial for the process of plant development which strongly depends on the presence of carbohydrates as a primary source of energy. In this study, we analyzed the differential effects of four sugars with varying concentrations on the pollen germination of Vinca rosea Linn. and Cucumis melo var. utilissimus Duth. & Fuller. using Brewbaker and Kwack’s medium as germination medium and hanging drop method after an incubation period of 1h. Sucrose and glucose supported the pollen germination but galactose and fructose did not support and even considerably inhibited the pollen germination of Vinca rosea. Whereas in pollen germination of Cucumis melo var. utilissimus, all the four sugars supported the pollen germination. The study suggests that 15% sucrose, for Vinca rosea, and 12% galactose, for Cucumis melo var. utilissimus, supports in achieving the highest pollen germination percentage when added to the pollen germination medium.

KARAKTER MORFOLOGI DAN FISIOLOGI TAPAK DARA (Vinca rosea L.) PADA BEBERAPA CEKAMAN AIR

<p><strong>Morphological and physiological characteristics of Vinca at di fferent water stress levels</strong></p><p>Vinca (Vinca rosea L.) is one of the important medicinal crops as the sources of raw materials for traditional medicines. Its alkaloid is believed can reduce the risk of cancer, blood tension and diabetes diseases. Recently, vinca is only grown as ornamental plant in the garden, therefore, its cultivation methods is limited, especially its water stress tolerance, lite purpose of this experiment was to study the effect of water stess on the morphological and physiological characteristics of vinca. A pot experiment was conducted in the plastics house of the Research Institute for Spice and Medicinal Crops from November 1997 to March 1998. Factorial experiment consisted two factors and three replications was arranged in a randomized block design. Ihe irst factor consisted of two vinca varieties, those wee white flowers (WFV) and red flowers of vinca (RFV). While 4 different levels of water stress i.e., (I) 100% ield capacity (FC), (2) 80% FC, (3) 60% FC, and (4) 40% FC were used as the second factor. Parameters used for evaluating the effect of teatment consisted of morphological characteristics such as (I) plant height, (2) number of primary branches, (3) number of leaves, (4) leaf area (5) dry weight of stem, (6) dry weight of leaf, (7) dry weight of flowers and (8) dry weight of roots, and physiological characteristics observed including: (I) percentages of opened stomata and (2) free proline content of leaf. Results showed that interaction between varieties and water stress did not significantly affect the morphological nor physiological characteristics. Varieties significantly affected the morphological characteristics (except plant height), however they did not signiicantly affect physiological characteristics. Water stress significantly affected the morphological (except dry weight of roots) and free proline contents. Under 80% FC, vinca produced the highest growth and dry weight of plant however, the plant growth and dry weight wee inhibited under 60 and 40% FC. Under 40% FC, percentages of opened stomata deceased signiicantly. Moeover, proline content in the leaves signiicantly increased by water stess treatments.</p>