Echinacea purpurea is an effective remedy for treating respiratory tract infections since it has antibacterial (against Streptococcus pyogenes, Haemophilus influenzae, Legionella pneumophila, etc.) and antiviral (mostly against respiratory viral diseases, especially coronaviruses) qualities.
Does echinacea have antibacterial properties?
The herb echinacea is indigenous to parts of the United States east of the Rocky Mountains. In addition to Canada and Europe, it is also grown in the western United States. The leaves, flowers, and roots of several echinacea plant species are used to create medication. The Great Plains Indian tribes utilized echinacea in their traditional herbal treatments. Later, settlers copied the Indians and started utilizing echinacea as a medicine as well. Echinacea had official status for a while because it was included in the US National Formulary from 1916 to 1950. However, the development of antibiotics caused echinacea use to decline in popularity in the United States. But now that some antibiotics are less effective than they formerly were against specific germs, echinacea is regaining popularity.
The common cold, the flu, and other upper respiratory illnesses are among the ailments for which echinacea is frequently used as a treatment. Some people hope to prevent a cold from developing by taking echinacea as soon as symptoms appear. Some individuals use echinacea after the onset of cold symptoms in an effort to lessen the severity of the illness.
Echinacea is also used to treat a variety of other illnesses, such as warts, ear infections, swine flu, ear infections, vaginal yeast infections, HIV/AIDS, herpes, tonsillitis, streptococcus infections, HIV/AIDS, syphilis, typhoid, malaria, and bloodstream infections (septicemia).
Brief overview
However, no studies utilizing Echinacea in the prevention or treatment of illnesses similar to COVID-19 have been found. Current research suggests that echinacea supplementation may reduce the duration and severity of acute respiratory tract infections. There were not many side events reported, indicating the relative safety of this herbal medication. Clinical studies have shown that Echinacea lowers levels of immunological molecules associated with cytokine storm, despite the fact that it might boost immune activity, which raises concerns that it can worsen over-activation of the immune system in cytokine storm.
Verdict
When given at the earliest sign of infection, Echinacea supplements may help with the symptoms of acute respiratory infections (ARI) and the common cold. No trials employing Echinacea in the prevention or treatment of illnesses like COVID-19, however, have been found. When taken at the outset of symptoms, Echinacea may lessen the intensity and/or duration of ARI, according to earlier research. E. purpurea or a mixture of E. purpurea and E. angustifolia having standardized levels of active components were employed in trials claiming benefit.
Echinacea use hasn’t been associated with many side effects, which suggests that this herbal remedy is generally harmless. No human studies using echinacea for up to 4 months could be found that showed cytokine storm symptoms.
The results were largely consistent with a reduction in the pro-inflammatory cytokines that are involved in the progression of cytokine storm and Acute Respiratory Distress Syndrome (ARDS), factors that are highly significant in the death of COVID-19 patients when looking at all human trials that reported changes in cytokine levels in response to Echinacea supplementation. Even though there isn’t any research on the therapeutic benefits of echinacea in the treatment of cytokine storms right now, this evidence shows that more study is necessary.
What medicinal plant has a high antibacterial and antibiotic content?
Because of the unknowable availability of either a standardized extract or a pure substance, plants are inherently endowed by God with the power to synthesize medical compounds. This ability also makes them a significant aid in novel chemical diversity discoveries. Preliminary antimicrobial screening against pathogenic bacteria was done on the Veronica biloba extracts made using the Soxhlet and maceration techniques. The fractions were evaluated for antifungal and antibacterial activity using the well-diffusion method at sample concentrations of 1030 L utilizing liquid-liquid extracts such as ethyl acetate, water, dichloromethane, and hexane. The outcome showed that all extracts had antibacterial activity against all pathogens used in the tests. Compared to other equivalent extracts, the ethyl acetate extract shown higher activity. Only the ethyl acetate extract outperformed the usual Nystatin test control when it came to bacterial (gram negative and gram positive) and fungal test strain resistance. As a result, microbial infections caused by bacterial and fungal strains might be treated with Veronica biloba extract.
Introduction
God naturally endowed plants with the ability to synthesize therapeutic compounds. Their separation from medicinal plants and the identification of the active ingredient they contain are very helpful in the development of novel medications that have a high therapeutic value and may be used to treat a variety of disorders [1]. A novel finding in the field of chemical diversity was greatly aided by the plant extract, also known as a natural product, because it was not known if it was available as a standardized extract or as a pure component [2]. Pharmaceutical research indicate that between 10 and 20 percent of plants are beneficially employed in healthcare to treat hazardous disorders like cancer [3]. The yew tree’s bark, which is used to treat breast and ovarian cancer and mostly contains taxol, is the traditional example given [2]. One or more compounds that are responsible for any activity and are closely related to one another are typically created during the isolation or extraction of medicinal plants [4]. In traditional medicine, folk medicine, modern medicine, food supplements, and synthetic pharmaceuticals, plants are the primary source of drugs [5]. According to a recent study, medicinal herbs primarily exhibit antioxidant action. The phenolic chemicals, which are primarily found in plants [6] and act as antioxidants, include flavonoids, lignins, and vitamins A, C, and E. Because of some reason, some who are engaged in conventional medicine have referred to pharmaceuticals derived from plants as effective therapies with no side effects, but ecological awareness has demonstrated the safety of natural products. Contrarily, the improper or abuse use of synthetic medications results in several issues and negative side consequences [7]. There are roughly 450 recognized species in the Veronica (Plantaginaceae) genus, which is found in both hemispheres and temperate regions [8]. There are 79 well-known species there, and 26 of these are endemic [9]. We chose the Veronica species for our inquiry because of their widespread value. They have biological functions as well as phytochemical and chemotaxonomic values. They have long been employed as expectorants, diuretics, tonics, restoratives, and cures for respiratory illnesses in Turkish and Chinese medicine [10]. A veronica species may have anticancer properties, according to certain studies [11]. The medicinal plant Veronica biloba’s potential for antibacterial and antifungal action is described in the current study.
History
Around 80% of individuals used traditional medicine as their primary form of healthcare, according to a World Health Organization research. Asia has a long history of using plants as medicine and interacting with the environment. To treat viral and chronic disorders, herbal remedies include a variety of novel and distinctive ingredients [12]. Since the dawn of civilization, people have used plant-based remedies to heal a variety of illnesses. Hindu Culture, which was written between 4500 and 1600 BC, is the first source that discusses the usage of medicinal plants [13]. Since the dawn of human civilization, medicine made from plants has had therapeutic benefits, and history records that for a very long time, plants, minerals, and animal products served as the primary sources of medication [14]. The synthetic chemical medications exhibit negative side effects on health and microbiological resistance. Man has a tendency to use ethnopharmacology to get hundreds of phytochemicals from plants that have many biological activities, such as analgesic, antibacterial, wound-healing, antioxidant, anticancer, and antidiarrheal properties, with little to no adverse effects. Natural products, according to some, are good for your health. Therefore, before the treatment is given to patients, clinical trials often evaluate claims of bioactive parts, their formulation, safety, and adverse effects. Twelve nations with high levels of biodiversity are home to around 20,000 therapeutic plants, according to a World Health Organization report [15]. With the advent of anti-infective medicine, the separation of penicillin from bacteria is unquestionably crucial. Plants are the source of about 25% of the medications that are used globally. Around 121 of the 252 essential active chemicals listed by the World Health Organization are still in use today. More than 11% of synthetic medications come from sources that are naturally occurring plants. Quinidine and quinine from Cinchona, atropine from Atropa belladonna, and codeine and morphine from Papaver somniferum are a few useful medications that have been extracted from plants. At least 60% of the anti-infective and anticancer drugs used in the clinical trial were from natural sources [16]. The naturally separated active component of the plant, such as phorbol ester, cannabinoids, forkolin, muccarine, colchicines, and yohimbine, is significant and is utilized to treat physiological, pharmacological, and biochemical studies [17]. The majority of compounds are extracted from domesticated or wild plants because many of them are currently not commercially synthesized [18].
Field of Knowledge
It is expensive and difficult to do research on a plant’s origin in order to find or produce a therapeutic medicinal substance [19]. About 100360 million US dollars and at least ten years of development are needed to develop a new medicine. 10,000 substances were investigated up until 1992, but only one out of four were found to be pharmaceutically active. In 50,000 tested plant extracts and 33,000 tested plant extracts, the National Cancer Institute discovered three biologically active substances for the treatment of human immunodeficiency virus [17]. They need a working grasp of chemistry, pharmacology, botany, toxicology, and other fundamental sciences. These specific disciplines shouldn’t be seen as supporting one another more than others. Other scientific disciplines, including as organic chemistry, anthropology, biotechnology, agronomy, and fundamental pharmaceuticals, play significant roles in the invention of each novel plant-based therapeutic [20]. When a medicinal plant is discovered, the therapeutic procedures that can be used (as homemade remedies) are herbal teas or the creation of pharmaceutical powder tablets, tinctures, capsules, fluid extract, standard enrich, or crude extract. Finally, a plant’s active natural ingredient, such as ergotamine (a precursor to, for instance, diogenin), digoxin, or quinine, which is itself the source of a medication, can be extracted and refined by extraction [21].
Selection of Plant
The method for choosing an appropriate plant is challenging and crucial. Discussions in pharmacology center on the need to separate a natural active ingredient or create a herbal remedy, which involves a number of historic uses, toxicity, chemical content, and randomization needs [22, 23]. Ethnopharmacology or ethnobotany are the terms used to describe conventional cultural medicine. It demonstrates how vital it is to use natural folk medicine, how different ethnic groups have done so, and how their preparation methods reveal information about the pharmacological effects and extraction methods. A different culture has its own medical infrastructure and set of diseases [24]. The environment of the plant affects the choice of active chemicals against insects and bacteria [18]. However, a special, highly effective medicinal medication has been discovered in biological research in a poisonous plant [17]. Based on chemotaxonomic or phylogenetic data, specific plant families and genera are chosen for a pharmaceutical action [25, 26]. To choose a selective plant, researchers decide on a randomized search for active pharmacological species; for instance, the discovery of an anticancer medicine follows this technique and, if recognized, they must find a new approach [23, 27, 28]. A cultivated plant that is typically chosen can offer genetically guaranteed homogeneous material with species that are endangered of going extinct [29]. Biologically active plant-derived chemicals that are anti-inflammatory, antibacterial, anticancer, contraceptive, and kidney medication as well as for mental treatment have been the subject of several papers in the scientific field in recent years. Viral, cardiovascular, and neoplastic disorders, however, are given priority [18]. Diterpenes, a naturally occurring taxol molecule that exhibits anti-tumor action, are derived from Taxus. More than 12,000 trees had to be felled in order to get 2500 mg of taxol isolated, and 27,000 tons of bark from T. bacata and T. brevifolia had to be collected. Due to the enormous demand for Taxus, alternate sources in other plants must be found or a significant amount must be synthesized [30].
Experimental Methodology
With the assistance of botanical expert Prof. Muhammad Israr of the Botany Department, Govt. Post Graduate College Mardan, as well as through various literature survey comparisons, the medicinal plant species Veronica biloba, biolobed, two-lobed speedwell, of the genus Veronica, was identified and confirmed.
The entire plant was chosen as the medicinal herb for the study or experiment. Fresh entire plants in the blossoming stage were gathered from Surkh Dheri, Rustam, Mardan, and Sang-e-mar mar, near Par Hoti District, Mardan. The plant gathering took place between February and March. From a fertile land, healthy plants are selected or collected.
The plants were cleaned and then chopped into little bits with scissors and knives. They were kept in storage so they could dry in the shade and be kept out of the environment’s dust and contaminants. The drying took place in a chamber without any exposure to light for around two weeks. After the plants have dried fully, make sure the powder is uniform in size and that the surface area is increased for improved extraction.
A thimble is a porous bag constructed from cellulose strong filter (manually manufactured paper) that contains 30 g of finely ground, uniform-size plant sample powder. The thimble is then introduced into the thimble chamber of the Soxhlet. In the bottom flask of the Soxhlet, 300 ml of ethanol were used for extraction. A condenser was added to the top section by adding water intake and outflow. The solvent was heated to a moderate temperature of roughly 40C using a mantox heater. It then vaporized, moved to the sample thimble chamber, condensed, and returned to its original state once the liquid extract reached the siphon arm and was repeatedly emptied into a bottom flask. Until the solvent drop could not leave residue when it evaporated, the process was resumed for 48 hours. Additionally, water, dichloromethane, n-hexane, and ethyl acetate are fractionated. The four fractions were then combined to create dried extract, which was then used to examine biological processes further.
In this approach, 20 g of ground-up plant material is placed in a covered Pyrex glass jar along with 200 ml of pure ethanol. The jar may be left at room temperature for up to three weeks as long as the appropriate daily shaking is done to release plant-soluble phytochemicals. To obtain concentrated ethanolic extract with solvent evaporation, the soaked extract is filtered through typical filter paper (Whatman filter paper). To determine whether there was any similarity in the patterns of the two extracts, thin-layer chromatography (TLC) was used for analysis. Additionally, the Soxhlet fraction obtained in water, dichloromethane, n-hexane, and ethyl acetate underwent the same fractionation as described above. The chosen dry extract from a fraction was then concentrated for use in additional biological activity analysis.
The four obtained dried portions were dissolved to create a 20 mg/ml solution in dimethylsulfoxide (DMSO). The solution was centrifuged for 25 minutes at a speed of 13000 rpm to ensure appropriate mixing. The activity of each active fraction was compared using the conventional antibiotics gentamicin (10 mg/discs), ampicillin (10 mg/discs), and ofloxacin (1 mg/ml).
The study’s microorganisms came from the microbiology division of Abdul Wali Khan University Mardan. Escherichia coli, a gram-negative bacteria, and Staphylococcus aureus, a gram-positive bug, were both used.
The microorganism suspension was made in accordance with McFarland standards. The MHA (MllerHinton Agar) was employed for the bacterial media preparation for the antibacterial sensitivity test analysis. 9.5 g of MHA was dissolved in 250 ml of distilled water to create the culture media. A clear to slightly opalescent gel is produced after properly mixing and boiling the amber-colored solution with regular agitation to completely dissolve the agar powder. After that, autoclave the media for 15 minutes at 121 C and 15 pounds of pressure to sterilize them. Pour 25 ml of the sterilized media into each Petri plate, leave for a few minutes to allow the media to harden, and then let the media to cool to room temperature in the laminar flow hood. Use a cotton swab to apply the cultured bacteria to the media after they have solidified. Then, rotate the media 90 degrees and cover the entire surface without leaving any gaps. Each Petri plate should have 6 bores that are 2.5 cm apart from one another. The first four bores receive 30 l of each fraction, the latter two receive antibiotics, and the final bore receives solvent. Two Petri plates are used for both bacteria in the positive control, while just one plate is used for the negative control of sterility of the media, which is devoid of any germs. All Petri plates should be kept in the biochemical oxygen demand (BOD) incubator for 24 hours at 37C. The outcome of the antibacterial activity is shown in Table 1. The inhibited zone is determined as the mean standard deviation for each fraction and active substance assessed (SD).
The information is shown as meanSD (standard deviation) in terms of the mm-wide zone of inhibition that each fraction exhibits. ANOVA comparisons were made, using a significance threshold of alpha of 0.05.
The Aspergillus fumigatus fungus was received from the Biochemistry department of Malakand University, Chakdara, and used in the antifungal activity on nutrient agar. The culture was carried out using sterilized media produced according to McFarland standard at 121C for 14 minutes in an autoclave. After streaks cultivated for 1214 hours, the well-diffusion technique was used as needed. 10 l of extract fraction, 10 l of nystatin, and 10 l of oxytetracycline were employed as the standard sample and test control, respectively, for the activity analysis. All Petri plates should be kept at 20C for a 72-hour incubation period. The outcome of the antifungal activity is shown in Table 2. For each fraction, the inhibited zone was determined as meanSD (standard deviation).
Results and Discussion
The development of drug resistance in bacteria and fungus (microbes) led to the current endeavor. In accordance with a national committee-recommended standard clinical laboratory technique, antimicrobial screening was conducted using the agar well-diffusion method [31]. Antibiotics made from extracted plants are secure, efficient, and rarely cause adverse effects [32]. The biological activity of the active phytochemicals, such as their ability to be antimicrobial against infections, aids in the development of novel antibiotics [3335]. For the first time, the current study looked into the antibacterial and antifungal properties of the herb Veronica biloba.
Table 1 provides a summary of the Veronica biloba fractionation extracts’ antibacterial report. The studied pathogens are impacted by the Veronica biloba extracts, which exhibit dose-dependent potential action. According to Figure 1 and Table 1, the crude ethyl acetate extract is more effective against both strains of bacteria, Staphylococcus aureus and Escherichia coli. With S. aureus, the highest zone of inhibition for the Veronica biloba ethyl acetate extracted fraction was 10.51 mm, while with E. coli, it was 7.30.2 mm at 30 L. (shown in Table 1). The inhibited zone with S. aureus and E. coli, respectively, measured 5.10.2 mm and 4.50.5 mm in the aqueous extracted fraction at 30 L. The zone of inhibition with S. aureus and E. coli for the hexane extracted fraction was 6.30.5 mm and 4.30.2 mm, respectively. This is significantly less than the zone of inhibition with the ethyl acetate fraction (shown in Figure 1). As compared to the typical antibiotics ofloxacin 11.50.15 mm, ampicillin 11.90.4 mm, and gentamicin 15.50.3 mm, the dichloromethane fraction demonstrated less activity with S. aureus 4.30.2 mm and 6.30.5 mm with E. coli zone of inhibition (shown in Figure 1 and Table 1).
Each Veronica biloba fraction demonstrated an inhibition zone against a certain bacterial strain.
Table 2 provides a summary of Veronica biloba’s antifungal assay results. Aspergillus fumigatus was significantly inhibited by the crudely extracted Veronica biloba fractions at the same dose. Ethyl acetate extract demonstrated the greatest inhibition with a 12.30.5 mm zone of inhibition at 10 L concentration (shown in Figure 2). But at a 10 L concentration, hexane extract inhibits 12.10.2, water 10.60.5, and dichloromethane 8.30.5 mm. Standard nystatin (test control) has a zone of inhibition that is 6.70.5 mm smaller at a 10 L concentration than Veronica biloba isolated fractions (shown in Figure 2 and Table 2).
Due to structural and membrane compositional differences, two strains of gram-positive and gram-negative bacteria have different sensitivities [42]. According to several research, gram-positive bacteria from different plant species have more potential for action than gram-negative bacteria [4348]. The cell membrane and cell wall structure of S. aureus are responsible for its potential sensitivity [49]. The external impermeable layer that negative strain bacteria have can essentially lower the amount of antibiotics in cells and demonstrate resistance to them [50].
Phytochemicals, such as flavonoids, polyphenols, saponins, steroids, tannins, terpenoids, and alkaloids, are naturally occurring active substances found in plants and are employed extensively in the treatment of disease as well as as dietary supplements and nutrients [5862]. Polyphenols make up the majority of flavonoids, and their presence can enhance an antibiotic’s ability to combat bacteria [63, 64]. The flavonoids, which are highly significant and potent antibacterial chemicals, form complexes with the extracellular components and protein of bacterial cell walls [65]. Terpenoids are implicated in membranous tissue disintegration and weakening of microbial cell walls [66]. Enzyme and protein leakage from the cell is a result of saponins’ interactions with microorganisms [67]. Liposome leaking from lipid bilayer membrane is caused by steroids in antimicrobials [68]. This is the first antimicrobial report on the medicinal plant Veronica biloba’s effectiveness against the diseases E. coli, S. aureus, and Aspergillus fumigatus.