scholarly journals Biochemical Profile and Antibacterial Examination of Freshwater Crab Scylla Serrata (FORSKAL, 1775)

2021 ◽  
Vol 3 (2) ◽  
pp. 53-65
Author(s):  
Leena Grace Beslin ◽  
Geni G
Keyword(s):  
Natural Products ◽  
Antimicrobial Agents ◽  
The Body ◽  
New Drugs ◽  
Scylla Serrata ◽  
Biochemical Profile ◽  
Bacterial Strains ◽  
Zone Of Inhibition ◽  
Muscle Sample ◽  
Promising Source

Natural products from the aquatic organisms provide unlimited opportunities for the production of new drugs. To verify this fact in the present study ‘the biochemical profile and antimicrobial activity of different samples of the estuarine crab, Sylla serrata’ was investigated. Biochemical study of the body parts of the crab gains substantial attention for their specificity in connection to the food values of the crab and for the evaluation of their physiological needs at different periods of life.   The total protein was estimated by Lowry's method and the amount of protein was highest in the soft muscle sample (20.27mg/ml). The total sugar was estimated by the Phenol-Sulphuric acid method and it was highest in the leg sample (209.8mg/ml). The lipids of the samples were estimated by Folchs method. Lipid was highest in the shell sample (28.35mg/ml). Thin Layer chromatography was done for characterization of protein. Antibiotics are used against bacterial infections. The natural products gained importance to screen antibiotics.     For this reason the antibacterial activity of the samples were tested against grampositive and gramnegative pathogenic bacterial strains. The bacterial strains like Klebsiella pneumoniae, Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli and Enterobacter aerogenes were used as the test strains. In the present study, the ethanol extract of crab sample I showed maximum zone of inhibition (13 mm) in P. aeruginosa. The sample I showed moderate zone of inhibition (11 mm) in K.pneumoniae.  The sample II showed the minimum zone of inhibition (7 mm) in P. aeruginosa. It indicated that the shell of crabs would be a good source of antimicrobial agents and would replace the existing inadequate and cost effective antibiotics. The microbial associates of crustaceans have proven to be a rich source of bioactivity with antimicrobial and cytotoxic effects. So the organism used in the present study will be the promising source to the biotechnological and pharmaceutical applications. 

scholarly journals Anti-lipolytic activity and phytochemical screening ofChelianthesalbomarginataagainst pathogenic microorganisms

2017 ◽  
Vol 18 (2) ◽  
pp. 56-62
Author(s):  
Rini Jarial
Keyword(s):  
Lipolytic Activity ◽  
Cholesterol Oxidase ◽  
Bacterial Activity ◽  
The Body ◽  
Diffusion Method ◽  
Bacterial Strains ◽  
Zone Of Inhibition ◽  
Oxidase Inhibition ◽  
Therapeutic Properties ◽  
Inhibition Zones

ABSTRACT:The aim of the present study was to evaluate the therapeutic properties of selected fern, Chelianthusalbomarginataand to identify its functional compounds. The methanolic fern-extract (MFE) of these ferns was assessed for anti-bacterial activities by measuring inhibition zones against a panel of pathogenic bacterial strains using agar diffusion method. MFE at a concentration of 25 μg/ml showed marked anti-bacterial activity against all bacterial strains (6-23mm zone of inhibition) and was maximum against Enterobacter sp (23 mm). In addition, the MFE of C. albomarginatahad the best MIC values of 2.25µg/ml against S. aureus and Enterobacter sp., respectively. The MFE also possessed good anti-lipolytic activity (66.5%) against a porcine pancreatic lipase (PPL) and cholesterol oxidase inhibition (79%). This result showed that MFE of C. albomarginataunder optimal concentrationis not only a potent source of natural anti-oxidants and anti-bacterial activity but also possesses efficient cholesterol degradation and anti-lipolytic activities, that is to be beneficial in the body weight management.

scholarly journals ANTIBACTERIAL ACTIVITIES OF SOME MEDICINAL PLANTS AND GREEN LEAFY VEGETABLES: A REVIEW

2021 ◽  
Vol 6 (4) ◽  
Author(s):  
C Mahendranathan ◽  
Ahyg Abhayarathne
Keyword(s):  
Medicinal Plants ◽  
Rural Areas ◽  
Antimicrobial Agents ◽  
Antibacterial Activities ◽  
The Body ◽  
Leafy Vegetables ◽  
Bacterial Strains ◽  
Green Leafy Vegetables ◽  
Synthetic Drugs ◽  
Development Of Resistance

Plants are considered not only as dietary supplement to living organisms but also traditionally used for treating many health problems and the medicinal value of many plants still remains unexplored investigations of plants are carried out to find novel drugs or templates for the development of new therapeutic agents. Plants produce a wide variety of phytochemical constituents, which are secondary metabolites and are used either directly or indirectly in the pharmaceutical industry. Majority of the population, especially those living in rural areas depends largely on medicinal plants for treatment of diseases. The resistance of pathogenic bacterial strains to antibiotics is the major burning issue around the world. Pharmacological industries have produced various new antibiotics ever since, but microorganisms have slowly developed resistance to these drugs because bacteria have the genetic capability to transmit and acquire resistance to these drug. Plants and plant products are a better alternative compared to antibiotics and other synthetic drugs which display negative side effects such as sensitization reactions, and disruption of the metabolic processes in the body via interaction with the body system. Hence antimicrobial agents from plants are a more reliable and effective source to fight these microorganisms without the development of resistance.

Marine Natural Products as a Promising Source of Therapeutic Compounds to Target Cancer Stem Cells

2020 ◽  
Vol 27 ◽  
Author(s):  
Catarina Vizetto-Duarte ◽  
Pedro Castelo Branco ◽  
Luísa Custódio
Keyword(s):  
Stem Cells ◽  
Natural Products ◽  
Cancer Stem Cells ◽  
Marine Natural Products ◽  
Epithelial To Mesenchymal Transition ◽  
Heart Diseases ◽  
The Body ◽  
Mesenchymal Transition ◽  
Anti Cancer ◽  
Promising Source

: Cancer is the world’s second leading cause of death after heart diseases, and involves abnormal cell growth at a primary site and the potential to spread to other parts of the body. Tumors are highly heterogeneous and consist of subgroups of cells with distinct characteristics. Of these, the cancer stem cells (CSC) niche plays a crucial role in driving the spread of the tumor and are thought to provide treatment resistance. CSC is a rare special population of cancer cells exhibiting high tumorigenic properties together with self-renewal and differentiation capability. CSC is not only linked with high tumor-initiating activity, but is also implicated in chemotherapeutic re-sistance, metastasis, epithelial to mesenchymal transition, and recurrence. Thereafter, novel ther-apeutic strategies targeting CSC are in need in order to improve long-term clinical outcome. The literature supports the evidence that marine natural compounds can exhibit antioxidant, antimitot-ic, anti-inflammatory, anti-biotic as well as anticancer activity. In this review, we will provide an insight into the relevance of selected marine natural products as a source of bioactive compounds with anti-cancer properties, and to target CSC, which may benefit the development of novel anti-cancer therapeutic strategies.

scholarly journals ANTIMICROBIAL PROPERTIES OF LEPTADENIA HASTATA (PERS) DECNE LEAVES EXTRACT

2018 ◽  
Vol 10 (2) ◽  
pp. 149 ◽  
Author(s):  
Isaac John Umaru ◽  
Fasihuddin A. Badruddin ◽  
Zaini B. Assim ◽  
Hauwa A. Umaru
Keyword(s):  
Ethyl Acetate ◽  
Antimicrobial Agents ◽  
Antimicrobial Properties ◽  
Salmonella Typhi ◽  
New Drugs ◽  
Diffusion Method ◽  
Zone Of Inhibition ◽  
Medical Practitioners ◽  
Antibacterial Potential ◽  
Agar Well Diffusion Method

Objective: This study was carried out with an objective to investigate the antibacterial potential of five leaf extract of Leptadenia hastata plant on some bacteria.Methods: Leptadenia hastata extracts were evaluated for potential antimicrobial properties. The leaves of the plant were extracted with n-hexane, dichloromethane, ethyl acetate, chloroform and methanol and then vaporized to give respective extracts. Antimicrobial activity against Escherichia coli, salmonella typhi, staphylococcus aureus and Klebsielia pneumonia, was determined by an agar well diffusion method. The optical density of the broth using UV mini spectrophotometer and zone of inhibition by the crude extract were determined.Results: The results showed that of n-hexane, ethyl acetate, dichloromethane and methanol extracts of Leptadenia hastata, methanolic and chloroform extracts displayed more activity with 1.10±0.10 mmab and 0.97±0.06 mmab where aSignificantly (p<0.05) higher compared to different extract at the same concentration bSignificantly (p<0.05) lower compared to the control, than others at 25-1000 ppm per well of the extracts tested.Conclusion: The present results showed the potential of the medicinal plant used by traditional herbal medical practitioners as natural antimicrobial agents, thus can be further used to determine the bioactive products that may provide as leads in the development of new drugs.

scholarly journals Stilbenoids: A Natural Arsenal against Bacterial Pathogens

Antibiotics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 336 ◽  
Author(s):  
Luce Micaela Mattio ◽  
Giorgia Catinella ◽  
Sabrina Dallavalle ◽  
Andrea Pinto
Keyword(s):  
Antimicrobial Activity ◽  
Natural Products ◽  
Antimicrobial Agents ◽  
Natural Compounds ◽  
Bacterial Strains ◽  
Chemical Structures ◽  
Potential Development ◽  
Further Development ◽  
Insight Into ◽  
Potential Antimicrobial Activity

The escalating emergence of resistant bacterial strains is one of the most important threats to human health. With the increasing incidence of multi-drugs infections, there is an urgent need to restock our antibiotic arsenal. Natural products are an invaluable source of inspiration in drug design and development. One of the most widely distributed groups of natural products in the plant kingdom is represented by stilbenoids. Stilbenoids are synthesised by plants as means of protection against pathogens, whereby the potential antimicrobial activity of this class of natural compounds has attracted great interest in the last years. The purpose of this review is to provide an overview of recent achievements in the study of stilbenoids as antimicrobial agents, with particular emphasis on the sources, chemical structures, and the mechanism of action of the most promising natural compounds. Attention has been paid to the main structure modifications on the stilbenoid core that have expanded the antimicrobial activity with respect to the parent natural compounds, opening the possibility of their further development. The collected results highlight the therapeutic versatility of natural and synthetic resveratrol derivatives and provide a prospective insight into their potential development as antimicrobial agents.

SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL EVALUATION OF 3-FORMYL INDOLE BASED SCHIFF BASES

2018 ◽  
Vol 7 (6) ◽  
Author(s):  
Singh Gurvinder ◽  
Singh Prabhsimran ◽  
Dhawan R. K.
Keyword(s):  
Antimicrobial Activity ◽  
Spectral Analysis ◽  
Schiff Bases ◽  
Antimicrobial Agents ◽  
Biological Evaluation ◽  
Fungal Strain ◽  
Bacterial Strains ◽  
Standard Drug ◽  
Gram Negative ◽  
E Coli

In order to develop new antimicrobial agents, a series of 3-formyl indole based Schiff bases were synthesized by reacting 3-formyl indole(indole-3-carboxaldehyde) with substituted aniline taking ethanol as solvent. The reaction was carried in the presence of small amount of p-toluene sulphonic acid as catalyst.All the synthesized compounds were characterized by IR, 1H-NMR spectral analysis. All the synthesized compounds were evaluated for antimicrobial activity against two gram positive bacterial strains (B. subtilisand S. aureus) and two gram negative bacterial strains (P. aeruginosaand E. coli) and one fungal strain (C. albicans). All the synthesized compounds were found to have moderate to good antimicrobial activity. The  standard drug amoxicillin, fluconazole were used for antimicrobial activity. Among the synthesized compounds, the maximum antimicrobial activity was shown by compounds GS04, GS07, GS08 and GS10.

Preliminary in Vitro Investigations on The Inhibitory Activity of The Original Dietary Supplement Oxidal® on Pathogenic Bacterial Strains

2020 ◽  
Vol 11 ◽  
pp. 37-43
Author(s):  
Prof. Teodora P. Popova ◽  
Toshka Petrova ◽  
Ignat Ignatov ◽  
Stoil Karadzhov
Keyword(s):  
Dietary Supplement ◽  
Broad Spectrum ◽  
Pathogenic Bacteria ◽  
Antimicrobial Agents ◽  
Clinical Effectiveness ◽  
Inhibitory Effect ◽  
Diffusion Method ◽  
Bacterial Strains ◽  
Microbial Strains

The antimicrobial action of the dietary supplement Oxidal® was tested using the classic Bauer and Kirby agar-gel diffusion method. Clinical and reference strains of Staphylococcus aureus and Escherichia coli were used in the studies. The tested dietary supplement showed a well-pronounced inhibitory effect against the microbial strains commensurable with that of the broad-spectrum chemotherapeutic agent Enrofloxacin and showed even higher activity than the broad spectrum antibiotic Thiamphenicol. The proven inhibitory effect of the tested dietary supplement against the examined pathogenic bacteria is in accordance with the established clinical effectiveness standards for antimicrobial agents.

STUDIES ON SOME BACTERIAL DISEASES IN OREOCHROMIS NILOTICUS WITH SPECIAL REFERENCES TO TREATMENT

2018 ◽  
pp. 39-47
Author(s):  
Viola Zaki ◽  
Ahmed EL-gamal ◽  
Yasmin Reyad
Keyword(s):  
Oreochromis Niloticus ◽  
Bacterial Infections ◽  
Antimicrobial Agents ◽  
Histopathological Examination ◽  
Klebsiella Oxytoca ◽  
Bacterial Isolates ◽  
Bacterial Strains ◽  
Tissue Samples ◽  
Hydropic Degeneration ◽  
Total Prevalence

he present research carried out to study the common bacterial infections in Oreochromis niloticus (Nile tilapia) in Manzala area at Dakahlia governorate and possible antimicrobial agents used for treatment. A total number of 400 fish were randomly collected from Manzala private farms at Dakahlia governorate and subjected to the clinical, bacteriological and histopathological examination. The highest prevalence of bacterial isolates during the whole period of examination of naturally infected O.niloticus was recorded for A.hydrophila (22.66%), followed by V.alginolyticus (19.01%), V.parahemolyticus (13.80%), Streptococcus spp. (12.24%), A.caviae (11.72%), V.cholera (10.16%), A.salmonicida (7.55%), while the lowest prevalence was recorded for Klebsiella oxytoca (2.86%). The seasonal highest total prevalence of bacterial isolates from examined naturally infected O. niloticus was recorded in spring (30.21%), followed by autumn (28.39%), then summer (22.40%) and the lowest prevalence was recorded in winter (19.01%). Histopathological findings of the tissue samples which collected from different organs of naturally infected O.niloticus revealed that spleen show marked hemosiderosis and sever hemorrhage, gills showsever congestion of lamellar capillaries with marked aneurysm, necrosis and hemorrhage of lamellar epithelium and liver show sever hydropic degeneration and necrosis of hepatocytes, Ciprofloxacin was the most effective antibiotic against all isolated bacterial strains

Natural Anti-inflammatory compounds as Drug candidates in Alzheimer’s disease

2020 ◽  
Vol 27 ◽  
Author(s):  
Reyaz Hassan Mir ◽  
Abdul Jalil Shah ◽  
Roohi Mohi-ud-din ◽  
Faheem Hyder Potoo ◽  
Mohd. Akbar Dar ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Natural Products ◽  
Protective Action ◽  
New Drugs ◽  
Huperzine A ◽  
Brain Disorder ◽  
Anti Inflammatory

: Alzheimer's disease (AD) is a chronic neurodegenerative brain disorder characterized by memory impairment, dementia, oxidative stress in elderly people. Currently, only a few drugs are available in the market with various adverse effects. So to develop new drugs with protective action against the disease, research is turning to the identification of plant products as a remedy. Natural compounds with anti-inflammatory activity could be good candidates for developing effective therapeutic strategies. Phytochemicals including Curcumin, Resveratrol, Quercetin, Huperzine-A, Rosmarinic acid, genistein, obovatol, and Oxyresvertarol were reported molecules for the treatment of AD. Several alkaloids such as galantamine, oridonin, glaucocalyxin B, tetrandrine, berberine, anatabine have been shown anti-inflammatory effects in AD models in vitro as well as in-vivo. In conclusion, natural products from plants represent interesting candidates for the treatment of AD. This review highlights the potential of specific compounds from natural products along with their synthetic derivatives to counteract AD in the CNS.

Natural Products for the Treatment of Neurodegenerative Diseases

2020 ◽  
Vol 27 (34) ◽  
pp. 5790-5828 ◽  
Author(s):  
Ze Wang ◽  
Chunyang He ◽  
Jing-Shan Shi
Keyword(s):  
Nervous System ◽  
Natural Products ◽  
Neurodegenerative Diseases ◽  
Neuroprotective Effect ◽  
Rapid Development ◽  
New Drugs ◽  
Progressive Degeneration ◽  
Cord Injury ◽  
The Central Nervous System ◽  
And Function

Neurodegenerative diseases are a heterogeneous group of disorders characterized by the progressive degeneration of the structure and function of the central nervous system or peripheral nervous system. Alzheimer&#039;s Disease (AD), Parkinson&#039;s Disease (PD) and Spinal Cord Injury (SCI) are the common neurodegenerative diseases, which typically occur in people over the age of 60. With the rapid development of an aged society, over 60 million people worldwide are suffering from these uncurable diseases. Therefore, the search for new drugs and therapeutic methods has become an increasingly important research topic. Natural products especially those from the Traditional Chinese Medicines (TCMs), are the most important sources of drugs, and have received extensive interest among pharmacist. In this review, in order to facilitate further chemical modification of those useful natural products by pharmacists, we will bring together recent studies in single natural compound from TCMs with neuroprotective effect.

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