Plant Bioactive Compounds Research Articles

Antitumor from Several Plant Compounds Against Hepatocellular Carcinoma Cell Line Hep3B: Mini Systematic Review

Liver cancer is a global health challenge, with more than one million cases expected by 2025. Hepatocellular carcinoma (HCC) is the most common form of liver cancer and accounts for approximately 90% of cases. Nature provides a large source of natural medicines and compounds, one of which is plants. So, this article is made to contain information on the potential of several plants as antitumor agents. The method of preparing articles through literature review studies that collect articles from various sources such as ScienceDirect, google scholar, PubMed and others in the range of 2013 to 2023. There are ten plant bioactive compounds that have been tested in vitro on Hep3B cell lines to see their toxicity. These plant bioactive compounds play an important role in the proliferation phase, cell cycle, and cell apoptosis in liver cancer and have potential as antitumor.

Screening of Multitarget-Directed Natural Compounds as Drug Candidates for Alzheimer's Disease Using In Silico Techniques: Their Extraction and In Vitro Validation.

Alzheimer's disease (AD) is a neurodegenerative disorder that impairs neurocognitive function. Acetylcholinesterase (AChE) and β-site APP cleaving enzyme 1 (BACE1) are the two main proteins implicated in AD. Indeed, the major available commercial drugs (donepezil, rivastigmine, and galantamine) against Alzheimer's are AChE inhibitors. However, none of these drugs are known to reverse or reduce the pathophysiological condition of the disease since there are multiple contributing factors to AD. Therefore, there is a need to develop a multitarget-directed ligand approach for its treatment. In the present study, plant bioactive compounds were screened for their AChE and BACE1 inhibition potential by conducting molecular docking studies. Considering their docking score and pharmacokinetic properties, limonin, peimisine, serratanine B, and withanolide A were selected as the lead compounds. Molecular dynamics simulations of these protein-ligand complexes confirmed the conformational and energetically stabilized enzyme-inhibitor complexes. The inhibition potential of the lead compounds was validated by in vitro enzyme assay. Withanolide A inhibited AChE (IC50 value of 107 μM) and showed mixed-type inhibition. At this concentration, it inhibited BACE1 activity by 57.10% and was stated as most effective. Both the compounds, as well as their crude extracts, were found to have no cytotoxic effect on the SH-SY5Y cell line.

Metabolite profiling of the medicinal herb Phyllanthus niruri L. under drought stress

Plant-specialized metabolites are unique sources for pharmaceuticals and industrially valuable biochemicals. Accumulation of these metabolites is common in plants stimulated by biotic or abiotic stressors and/or elicitors. One of the abiotic factors that influence the plant’s bioactive molecule is drought stress, which can be employed to stimulate the production of bioactive compounds in plants. Phyllanthus niruri is commonly used as a medicinal plant in many parts of the world for the treatment of various diseases because it contains bioactive compounds that have the potential to be antioxidants, antimicrobials, and anti-hepatoprotective. Our previous studies have demonstrated that drought stress up to 70% field capacity (FC) could increase crop production as well as phenol and flavonoid contents. This study aimed to analyze the metabolite profile of P. niruri, which was subjected to drought stress for various FC (Control, 85%, 80%, 75%, 70%, 55%). Using chromatography-mass spectrophotometry (GC-MS) analysis, forty-seven compounds were identified. Three compounds were detected in control and all treatments, whereas four compounds were only detected in drought-stressed plants. β-sitosterol, 9-tricosane, heneicosane, and hexacosane are the main compounds only detected at 80% FC. The clustering analysis revealed that drought stress induced distinct compounds compared to control. Moreover, 85% -75% FC presumably induces similar compounds as they were in the same cluster, while plants responded differently upon 70% FC and 55% FC. In conclusion, P. niruri synthesizes different bioactive compounds under different drought-stress conditions.

Isolation and Phytochemical Testing of Endophytic Fungi from Imperata cylindrica (L.) Beauv plants.

High drug prices and increasing antibiotic resistance have prompted exploration of natural resources as a source of new antibiotics. The Imperata cylindrica (L.) Beauv. plant is one of the plants used in traditional medicine. Secondary metabolites as bioactive compounds in plants can be obtained through endophytic fungi without having to extract them from plants. Secondary metabolites produced by endophytic fungi can function as raw materials for medicines. This research aims to isolate endophytic fungi and test phytochemicals from Imperata plants to determine the type of secondary metabolites produced. The methods used in this research include isolation and purification of endophytic fungi, identification of endophytic fungi, production of secondary metabolites of endophytic fungi, and screening of phytochemicals resulting from endophytic fungi fermentation. The isolation results showed that there were 7 isolates of endophytic fungi, consisting of 1 isolate from the flower, 3 isolates from the stem, and 3 isolates from the roots. Identification of endophytic fungus using macroscopic and microscopic observations including the genera Fusarium sp., Mucor sp., Penicillium sp., Trichoderma sp., Aspergillus sp., Phytophthora sp. The results of the phytochemical test for endophytic fungi showed that the secondary metabolites produced were flavonoid and saponin compounds. Based on this research, it can be concluded that the endophytic fungi of the Imperata cylindrica (L.) Beauv. plant produces secondary metabolites which have the potential to be developed as medicinal raw material compounds.

Extraction: An important tool in the pharmaceutical field

The present review discuss various extraction methods used in obtaining bioactive compounds from medicinal plants. It defines key terms like "medicinal plant," "menstruum," and "marc." The choice of solvent (menstruum) depends on plant type and bioactive compounds. Polar solvents (e.g., water) are used for polar compounds, while nonpolar solvents (e.g., hexane) are used for nonpolar compounds. Solvents are categorized by polarity from least polar (n-hexane) to most polar (water). Different extraction methods are detailed, including infusion, decoction, percolation, maceration, Soxhlet extraction, supercritical fluid extraction, microwave-assisted extraction, and ultrasound-assisted extraction. The advantages and disadvantages of each method are discussed. The abstract covers the properties and applications of different solvents, such as water, alcohol, chloroform, ether, and ionic liquids. Factors like selectivity, safety, cost, reactivity, and recovery are important in selecting solvents. The abstract concludes by discussing the advantages and disadvantages of different extraction methods, including hydro distillation. It emphasizes the importance of choosing the right method based on the nature of the plant material and desired compounds.

Understanding of genes encoding bioactive compounds from potential medicinal plants in Indonesia as cancer cell inhibitors

Abstract. Muflikhati Z, Sianipar NF, Syamsunarno MRAA, Anas. 2023. Understanding of genes encoding bioactive compounds from potential medicinal plants in indonesia as cancer cell inhibitors. Biodiversitas 24: 4645-4660. Indonesia has abundant plant diversity and enormous potential to be developed as a source of medicinal plants due to the content of bioactive chemicals in them. Potential medicinal plants from Indonesia, such as Andrographis paniculata (Sambiloto), Curcuma longa (Kunyit), Moringa oleifera (Moringa), Phyllanthus niruri (Meniran), Orthosiphon stamineus (Kumis kucing), Typhonium flagelliforme (Keladi tikus), and Zingiber officinale (Jahe), contain bioactive compounds with mechanisms that act as anticancer. Bioactive compounds with anticancer mechanisms in plants can be controlled by specific genes. Therefore, it is important to elaborate on bioactive compounds and the genes involved. This article aims to discuss the genes encoding bioactive compounds in Indonesian medicinal plants and the mechanisms that can inhibit cancer cell growth. Several genes encode anticancer compounds, such as lectin-coding genes, the stigmasterol-coding CYP710A gene, the tocopherol-coding ?-TMT gene, the fatty acid-coding FAD gene, the doxorubicin-coding DXR gene, and the chalcone synthase-coding CHS gene. These genes have mechanisms to increase the expression of several apoptosis-promoting proteins, including BCL-2 family members, in several cancer cell models. This article also describes the potential utilization and creation of molecular markers linked to genes encoding anticancer chemicals and can be used as a reference for research on medicinal plants that is still limited. Knowledge of genes encoding anticancer compounds in plants can support future research in the development of cancer drugs.

Efficacy of Different Solvents in the Extraction of Bioactive Compounds and Anticancer Activities of Thyme (Thymus vulgaris L.) Leaves and Twigs

Thyme contains phytochemicals that exhibit cytotoxic and cytogenic activities. Differ solvents have different abilities in dissolving plant bioactive compounds. The objective of this study is to determine the anticancer properties of thyme leaves and twigs including profile of bioactive compounds, cytotoxicity, ability of apoptosis induction and caspase-3 activation of different solvent extracts on T47D breast cancer cell line. An experimental study was conducted in eight groups. T47D breast cancer cell line was treated with thyme extracts as treatment group, doxorubicin as positive control, while untreated T47D cells were used as negative control. Thyme was extracted by maceration using 6 different solvents: methanol, ethanol, chloroform, ethyl acetate, dichloromethane, and n-hexane. Bioactive compounds of all extracts were analyzed by GC-MS. Cytotoxicity was investigated through MTT assay on T47D breast cancer cell line. The percentage of apoptosis and caspase-3 were detected by flow cytometry using Annexin V-PI and BD Cytofix/Cytoperm, respectively. Thymol as the main bioactive compound in thyme was found in all extracts. MTT results revealed that six solvents extracts had moderate to weak cytotoxicity with dichloromethane had the lowest IC50 values at 120.23 µg/ml. All thyme extracts promoted apoptosis in T47D cells with apoptosis percentage of methanol, chloroform, ethyl acetate, ethanol, dichlorometane, n-Hexane and doxorubicin were 82.67; 80.98; 73.13; 72.28; 60.62; 27.74 and 98.43%, respectively. Among all extracts, methanol extract showed the highest apoptosis and caspase-3 activation percentage. We conclude that all thyme extracts had anticancer properties in T47D breast cancer cell line although efficacy of each solvent extract was differed.

Chromogenic Assay Is More Efficient in Identifying α-Amylase Inhibitory Properties of Anthocyanin-Rich Samples When Compared to the 3,5-Dinitrosalicylic Acid (DNS) Assay.

The inhibition of carbohydrate digestion by plant bioactive compounds is a potential dietary strategy to counteract type 2 diabetes. Indeed, inhibition of α-amylase, a key enzyme that carries out the bulk of starch digestion, has been demonstrated for a range of bioactive compounds including anthocyanins; however, sample pigmentation often interferes with measurements, affecting colorimetric assay outcomes. Therefore, the present study compared the performance of a direct chromogenic assay, using 2-chloro-4 nitrophenyl α-D-maltotrioside (CNPG3) as a substrate, with the commonly used 3,5-dinitrosalicylic acid (DNS) assay. The direct chromogenic assay demonstrated a 5-10-fold higher sensitivity to determine α-amylase inhibition in various samples, including acarbose as a reference, pure anthocyanins, and anthocyanin-rich samples. The IC50 values of acarbose presented as 37.6 μg/mL and 3.72 μg/mL for the DNS assay and the direct chromogenic assay, respectively, whereas purified anthocyanins from blackcurrant showed IC50 values of 227.4 µg/mL and 35.0 µg/mL. The direct chromogenic assay is easy to perform, fast, reproducible, and suitable for high-throughput screening of pigmented α-amylase inhibitors.

Effectiveness of silver nitrate application on plant growth and bioactive compounds in Agastache rugosa (Fisch. & C.A.Mey.) kuntze

The objective of this study was to determine the optimal dose of silver nitrate (AgNO3) for plant growth and to increase the main bioactive compounds in A. rugosa cultivated in a hydroponic system. The application of soaked diniconazole (120 μmol mol−1) to all plants at 7 days after transplanting (DAT) for dwarfing plant height, optimizing cultivation space in the plant factory. Subsequently, plants were soaked with 50, 100, 200, and 400 μmol mol−1 AgNO3 for 10 min at 25 DAT and harvested at 39 DAT. The results indicated that 200 and 400 μmol mol−1 treatments tended to severely decrease plant growth parameters compared to treatments with lower concentrations. The net photosynthetic rate was significantly reduced by the 200 and 400 μmol mol−1 treatments compared to treatments with other concentrations. The 400 μmol mol−1 treatment led to the lowest concentrations of chlorophyll a, chlorophyll a/b, total carotenoid, chlorophyll b, and the total chlorophyll. However, 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity was considerably increased in 50, 100, 200, and 400 μmol mol−1 compared to that of the control plants. A higher rosmarinic acid (RA) concentration in the whole plant was noticed with the 400 μmol mol−1 treatment compared with that of the untreated plants. The 100 μmol mol−1 treatment exhibited the highest concentration and content of tilianin in the whole plant. Concentration of acacetin 1 significantly increased in the whole plant with 100 and 200 μmol mol−1 treatments compared with that of the untreated plants. Concentrations of acacetin 2 and 3 in the whole plant were the highest with 100 and 200 μmol mol−1 treatments, respectively. The results demonstrated that 100 μmol mol−1 treatments can be used to increase bioactive compounds without severely limiting the plant growth and reducing chlorophyll concentrations of A. rugosa. Implementing this optimal dose can enable growers and researchers to cultivate A. rugosa more efficiently, enhancing bioactive compound content and overall plant performance, thus harnessing the potential health benefits of this valuable plant species.

Technological strategies for the use of plant-derived compounds in the preservation of fish products.

New approaches to reducing synthetic preservatives in the preservation of foods draw the attention of plant-derived bioactive compounds, especially for application in foods highly susceptible to spoilage, such as fish products. The review presents relevant data from procurement, application, and methodological research trends to investigate the potential effects of plant-derived bioactive compounds on shelf life extension in fish products. The systematization of data allowed observation that the different methods of extraction and application of bioactive plant compounds result in different effects, such as the reduction of lipid oxidation, antimicrobial effects, and maintenance of sensory characteristics, benefiting the extension of shelf life. In general, plant-derived bioactive compounds are an alternative for the preservation of fish products; however, approaches to the composition of the compounds can contribute to the optimization and efficiency of the process from a technical point of view and industrial viability.

Estimating the production of withaferin A and withanolide A in Withania somnifera (L.) dunal using aquaponics for sustainable development in hill agriculture.

Humanity is suffering from huge and severe difficulties, including changes in climate, soil degradation, scarcity of water and the security of food and medicines, among others. The aquaponics system acts as a closed loop consisting of aquaculture elements and hydroponics, which may contribute to addressing these problems. The aquaponics method is quickly expanding as the requirement to increase the production of sustainable herbal products, including medicinal compounds and foods, in freshwater systems and replenish phosphorous reserves shrinks. The current work is designed to increase the production of the antioxidants withaferin A and withanolide A in two varieties (Jawahar-20 and Poshita) of W. somnifera using the aquaponics technique. Total 100 seedlings (one month old) grown in soil initially were taken to be grown in aquaponics for a time period of 6 months.And 100 seedlings were placed in pots containing soil as control for study after six months. It was observed that the higher content of withaferin A was analyzed in the root and stem samples of Jawahar-20 and Poshita from the six-month-old plant of W. somnifera. The maximum content of withanolide A was examined in the root samples of the six month-old plants of Poshita (1.879 mg/g) and Jawahar-20 (1.221 mg/g). While the 6 month old Poshita seedling grown in soil recorded less withaferin A (0.115 ± 0.009b) and withanolide A (0.138 ± 0.008d). It is concluded that Poshita was found to be more promising for the enhanced production of withaferin A and withanolide A in the aquaponics system. Moreover, the root was observed as the best source for the production of withaferin A and withanolide A and the best age of the plant is 2 years for the production compounds in medicinal plants with futuristic perspective to hill agriculture integrated farming. compounds. Thus aquaponics can be an effective approach with enhanced yield of bioactive compounds in medicinal plants with futuristic perspective to hill agriculture and integrated farming.

Evaluation of the antioxidant and antimicrobial activity of plant bioactive compounds as natural preservatives

Relevance. Natural preservatives such as salt or sugar can be harmful to human health if consumed in excess. Artificial preservatives often use synthetic chemicals that are considered safe by the FDA. A more serious health problem associated with artificial preservatives is that they are often found in unhealthy, processed foods.Methods. The monographic method was used in the work, as well as methods of analysis, systematization, comparison, generalization. The search for data sources was carried out in scientific electronic libraries and search engines eLIBRARY.ru, Science Direct, Scopus, ResearchGate and Cyberleninka portals.Results. Apple peel extract showed high antioxidant activity and effectively slowed down lipid oxidation. At a concentration of 50 micrograms/ml, the OH removal activity was 57%. The antibacterial activity of sea buckthorn seeds is 200–350 mcg/ml, expressed in a minimum inhibitory concentration against various grampositive and gram-negative bacteria, the antioxidant activity is 40,379–93,473, expressed as a percentage.Antioxidant phenolic compounds present in the seeds and skins (meal) of grapes account for 60–70% of the total polyphenols in grapes.Total antioxidant activity for black currant leaves. was 44.51 ± 1.72%.Summing up the comparison of the antioxidant activity of the selected sources, we can conclude that the source that showed the highest antioxidant activity is grape cake. However, if we pay attention to the climatic factor, in the conditions of the Russian Federation it is most expedient to use the peel of apples with an antioxidant activity of 57%, in view of the abundance of this product and the ease of its cultivation

Potential Agricultural Uses of Micro/Nano Encapsulated Chitosan: A Review

Chitosan is a non-toxic, biodegradable, and biocompatible natural biopolymer widely used as a nanocarrier, emulsifier, flocculant, and antimicrobial agent with potential applications in industry. Recently, chitosan has been used as an encapsulating agent for bioactive plant compounds and agrochemicals by different technologies, such as spray-drying and nanoemulsions, to enhance antimicrobial activity. Chitosan nanocomposites have been shown to increase potential biocidal, antibacterial, and antifungal activity against pathogens, presenting higher stability, decreasing degradation, and prolonging the effective concentration of these bioactive compounds. Therefore, the objective of this work is to review the most outstanding aspects of the most recent developments in the different methods of encapsulation of bioactive compounds (phenolic compounds, essential oils, among others) from plants, as well as the applications on phytopathogenic diseases (fungi and bacteria) in vitro and in vivo in cereal, fruit and vegetable crops. These perspectives could provide information for the future formulation of products with high efficacy against phytopathogenic diseases as an alternative to chemical products for sustainable agriculture.

In vitro antioxidant activity of alginate nanoparticles encapsulating the aqueous extract of Coccinia grandis L.

Bioactive compounds in medicinal plants are more susceptible to preventing oxidative stress. Encapsulation of herbal extracts has empowered the properties and characteristics of bioactive compounds. Nanoencapsulation allows the enhancement of the stability of extracts and targeted drug delivery. The present study aims to determine the antioxidant activity of alginate nanoparticles encapsulating the aqueous extract of Coccinia grandis L. (Family: Cucurbitaceae). The aqueous extract of C. grandis (AqCG) was prepared by using ultrasonication (40 °C, 20 min, 40 kHz) followed by refluxing (2½ h). The prepared AqCG (1-5 mg/mL) encapsulated alginate nanoparticles were synthesized by ionic gelation with the addition of extracts and CaCl2. Characterization of nanoparticles was performed via encapsulation efficiency (EE%), loading capacity (LC%), particle size (PS), scanning electron microscopy (SEM), zeta potential and Fourier transform infrared (FTIR) spectroscopy analysis. The antioxidant activity of the nanoparticles was evaluated in vitro by the ferric reducing antioxidant (FRAP) assay, 2,2-di-phenyl-1-picrylhydrazyl (DPPH) radical scavenging assay and 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging assay. One-way analysis of variance (ANOVA) followed by Tukey's posthoc test was used to analyze the data. Maximum LC% (3.07 ± 0.11) and average particle size (71 nm from SEM) were obtained for alginate nanoparticles encapsulated at 4 mg/mL extract concentration. The IC50 values for DPPH, ABTS, and FRAP were 6.49 ± 0.10 mg/mL, 0.24 ± 0.01 mg/mL, and 20.63 ± 0.28 mg Trolox equivalent/g of extract respectively for alginate nanoparticles encapsulating the AqCG. Nanoparticles have shown a significant difference in IC50 values compared to Trolox (p < 0.05). The successful encapsulation of the AqCG in the alginate matrix was evidenced by FTIR and SEM analysis. Encapsulation contributed to enhancing the antioxidant activity in terms of ABTS assay when compared to the AqCG. However, in vitro release and stability studies are warranted to facilitate the development of a commercially viable nanonutraceutical using alginate nanoparticles encapsulating the AqCG.

Cold Plasma-Assisted Extraction of Phytochemicals: A Review.

In recent years, there has been growing interest in bioactive plant compounds for their beneficial effects on health and for their potential in reducing the risk of developing certain diseases such as cancer, cardiovascular diseases, and neurodegenerative disorders. The extraction techniques conventionally used to obtain these phytocompounds, however, due to the use of toxic solvents and high temperatures, tend to be supplanted by innovative and unconventional techniques, in line with the demand for environmental and economic sustainability of new chemical processes. Among non-thermal technologies, cold plasma (CP), which has been successfully used for some years in the food industry as a treatment to improve food shelf life, seems to be one of the most promising solutions in green extraction processes. CP is characterized by its low environmental impact, low cost, and better extraction yield of phytochemicals, saving time, energy, and solvents compared with other classical extraction processes. In light of these considerations, this review aims to provide an overview of the potential and critical issues related to the use of CP in the extraction of phytochemicals, particularly polyphenols and essential oils. To review the current knowledge status and future insights of CP in this sector, a bibliometric study, providing quantitative information on the research activity based on the available published scientific literature, was carried out by the VOSviewer software (v. 1.6.18). Scientometric analysis has seen an increase in scientific studies over the past two years, underlining the growing interest of the scientific community in this natural substance extraction technique. The literature studies analyzed have shown that, in general, the use of CP was able to increase the yield of essential oil and polyphenols. Furthermore, the composition of the phytoextract obtained with CP would appear to be influenced by process parameters such as intensity (power and voltage), treatment time, and the working gas used. In general, the studies analyzed showed that the best yields in terms of total polyphenols and the antioxidant and antimicrobial properties of the phytoextracts were obtained using mild process conditions and nitrogen as the working gas. The use of CP as a non-conventional extraction technique is very recent, and further studies are needed to better understand the optimal process conditions to be adopted, and above all, in-depth studies are needed to better understand the mechanisms of plasma-plant matrix interaction to verify the possibility of any side reactions that could generate, in a highly oxidative environment, potentially hazardous substances, which would limit the exploitation of this technique at the industrial level.

Targeting Retinol-Binding Protein 4 (RBP4) in the Management of Cardiometabolic Diseases.

The ancient use of herbs for the treatment of various human diseases have been documented, with several scientific literatures supporting the use of medicinal plants. There is however a major concern about the phyto-constituents in the plants that performs the healing function and the mechanism by which it works for different ailments are still a research prospect. Cardiometabolic disease (CMD) is no doubt becoming more frequent globally and this is due to poor approach in therapy, contrary effects linked with intensive control, inept strategies with old drugs, inadequate control of some risk factors and lack of knowledge of the pathophysiological mechanisms that lead to this malaise. Retinol-binding protein 4 (RBP4) are predominantly secreted in the liver and adipose tissues and several researches have observed that elevation in serum levels of RBP4 often observed in obese experimental animals and human subjects causes CMD (obesity, insulin resistance, hyperlipidemia, etc.). RBP4 has gained special attention in the last 20years in the field of metabolism research. This review aims to show research interaction of some medicinal plants targeting RBP4 in treating CMD and to encourage researchers, who are interested in CMD drug design, to focus on medicinal plants that inhibit the secretion of serum RBP4 in the adipose tissue for therapeutic approach to CMD. It also aims to identify the major bioactive compounds of plants that serves as a better and cheaper drug candidate for CMD and also study the signaling pathway which the plant material uses to regulate the metabolic consequences.

Modulating Natural Methane Release from Rumen Fermentation through the Use of Ficus glomerata Leaf Tannins in Murrah Buffalo (Bubalus bubalis)

Enteric fermentation is one of the largest contributors of methane release to the environment from the livestock sector. Plant bioactive compounds can modulate rumen fermentation for reduced methanogenesis and fatty acid biohydrogenation. The present study investigates the effects of tannin extract from Ficus glomerata (FG) leaves on the rumen fermentation, methanogenesis, feed digestibility and fatty acid biohydrogenation of a total mixed ration with the aim of developing a feed supplement for enhanced livestock production and product quality with lower methane emission. The tannin extract (70% aqueous acetone extract) of FG leaves in the total mixed ration (oat hay/concentrate mixture; 1:1) was studied at four graded dose regimens (0.0 (control), 0.25 mL (FG-0.25), 0.50 mL (FG-0.50) and 1.0 mL (FG-1.0) per 60 mL of buffered rumen fluid) in three replicates for each treatment in a radio-frequency-based automatic gas production system (ANKOM-RF) at 39 °C for 24 h following the standard in vitro gas production protocol. The total gas production (mL or mL/g incubated dry matter (DM)) was gradually reduced (p &lt; 0.01) at dose levels of FG-0.50 and FG-1.0; however, it remained intermediary and comparable (p &gt; 0.05) for FG-0.25 with the control and FG-0.50. Compared to the control, the methane concentration (%) in the head space gas, as well as the total methane production (mL or mL/g DM incubated, or mL/g DM digested), were found to be gradually reduced (p &lt; 0.01) with increasing doses (0.25–1.0 mL) of FG extract. The reduced (p &lt; 0.05) feed degradability at higher levels (0.50–1.0 mL) of FG extract supplementation and the comparative (p &gt; 0.05) effects with the control at a lower level of supplementation (FG-0.25) are suggestive of the dose-responsive detrimental effects of tannins on fibrolytic microbes in the rumen. However, the ammonia concentration decreased (p &lt; 0.05) in all of the incubations compared to the control. Among the volatile fatty acids, acetate remained comparable (p &gt; 0.05) with enhanced (p &lt; 0.05) propionate at a lower dose (FG-0.25); however, a dose-dependent reduction was evident at higher dose levels (FG-0.50 and FG-1.0). The production of stearic acid (C18:0), which is a product of the rumen biohydrogenation process, was reduced (p &lt; 0.05), irrespective of the concentration of the FG extract. Compared to the control, the concentration of t-vaccenic acid (C18:1), which is a precursor of conjugated linoleic acid (CLA) in animal products, was increased in all the FG-extract-supplemented groups. It may be concluded that Ficus glomerata leaf tannins can modulate rumen fermentation for reduced methanogenesis and fatty acid biohydrogenation in a total mixed ration. As a higher level of inclusion negatively affects feed digestibility, a lower dose (0.25 mL FG extract per 60 mL fermentation fluid or 4.17 mL FG extract per L of fermentation fluid) is suggested to achieve desirable effects on methane abatement (30%) and an improvement in fatty acid profiles in animal products.

Selective extraction of plant bioactive compounds with deep eutectic solvents: Iris sibirica L. as example.

Deep eutectic solvents (DESs) are promising extractants with tuneable properties. However, there is a lack of reports about the influence of the nature of the original DES on obtaining the metabolomic profile of a plant. The aim of this study is to investigate the possibility of obtaining Iris sibirica L. chromatographical profiles with DESs based on various hydrogen bond donors and acceptors as extraction solvents. DESs were prepared by mixing choline chloride or tetrabutylammonium bromide with various hydrogen bond donors and investigated for the extraction of bioactive substances from biotechnological raw materials of I. sibirica L. The obtained extracts were analysed by HPLC with diode array detector (DAD) and Q-MS. Chromatographic profiles for I. sibirica L. extracts by eight choline chloride DESs and six tetrabutylammonium DESs have been obtained. It has been found that selective recovery of bioactive substances can be achieved by varying the composition of DESs. Eleven phenolic compounds were identified in I. sibirica L. using HPLC-MS. Phase separation was observed with acetonitrile for four DESs. New flavonoid derivatives have been found in DES extracts compared with methanol extracts. The results showed the possibility of DES usage for extraction without water addition. Selectivity of DESs varies depending on the chemical composition of hydrogen bond donors and acceptors. Choline chloride is a more suitable hydrogen bond acceptor for the flavonoid extraction. Choline chloride-lactic acid (1:1) DES has demonstrated a metabolic profile that was the closest to the methanol one and enhanced the extraction up to 2.6-fold.

Role of plant bioactive as diuretics: General considerations and mechanism of diuresis.

Medicinal plants have been found beneficial in the control and therapy of many ailments as they contain bioactive compounds, and many of them are used as precursors in the biosynthesis of natural medicines. Diuretics are used as a primary treatment in patients with edema associated with liver cirrhosis and kidney diseases, hyperkalemia, hypertension, heart failure, or renal failure. Furthermore, they are also used to increase the excretion of sodium and reduce blood volume. Due to various adverse events associated with synthetic diuretics, there is a need to investigate alternate plant-based bioactive components that have effective diuretic activity with minimal side effects. This review compiled the reported bioactive compounds from different plant sources along with their mechanisms of diuretic activity. Different sources were used to collect information regarding herbal plants with therapeutic value as diuretics. These included published peer-reviewed journal articles, scholarly articles from StatPearls, and search engines like Google Scholar, PubMed, Scopus, Springer, ScienceDirect, Wiley, etc. Results: In this review, it was found that flavonoids like rutin, acacetin, naringenin, etc. showed significant diuretic activity in experimental models by various mechanisms, but mostly by blocking the sodium-potassium-chloride co-transporter, while some bioactive compounds showed diuretic actions via other mechanisms as well. Research on clinical trials of these isolated bioactive compounds needs to be further conducted. Thus, this review provides an understanding of the potential diuretic bioactive compounds of plants for further research and pharmaceutical applications.

Evaluation of Antiphytoviral and Antibacterial Activity of Essential Oil and Hydrosol Extracts from Five Veronica Species

Agricultural production without pollution is possible using bioactive plant compounds, which include essential oils as important substances of plant origin. The aim of this study was to evaluate the antiphytoviral and antibacterial potentials of lipid (essential oil, EO) and water (hydrosol, HY) extracts from five Veronica species (Plantaginaceae) obtained by Clevenger hydrodistillation (HD) and microwave-assisted extraction (MAE), with analysis by gas chromatography coupled with mass spectrometry. The antiphytoviral activities of both extracts were tested on local host plants infected with tobacco mosaic virus (TMV). The antibacterial potential was tested against ten strains of opportunistic pathogens using the broth microdilution test. Species V. chamaedrys EO-MAE extract, V. arvensis EO from both extractions and V. montana, V. serpyllifolia, and V. persica EO-HD extracts were more effective in inhibiting TMV infection. Furthermore, HY- HD extracts of V. arvensis, V. chamaedrys and V. persica showed significant antiphytoviral activity. HY fractions had no effect on bacterial growth, regardless of the Veronica species tested, likely due to the fact that the maximum concentrations of the HY fractions tested in this study were low (1.83 and 2.91 mg/mL). EOs showed significant antibacterial activity independent of the extraction method. Notably, V. chamaedrys EO-MAE fraction, showed significantly better activity against Listeria monocytogenes and Enterococcus faecalis. Also, the EO-HD fraction of V. arvensis showed slightly better antibacterial activity. By combining extracts and using different extraction methods, valuable bioproducts can be obtained from the investigated Veronica species for safe use in agricultural production and food conservation.