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Psidium guajava

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https://www.readbyqxmd.com/read/28441777/health-effects-of-psidium-guajava-l-leaves-an-overview-of-the-last-decade
#1
REVIEW
Elixabet Díaz-de-Cerio, Vito Verardo, Ana María Gómez-Caravaca, Alberto Fernández-Gutiérrez, Antonio Segura-Carretero
Today, there is increasing interest in discovering new bioactive compounds derived from ethnomedicine. Preparations of guava (Psidium guajava L.) leaves have traditionally been used to manage several diseases. The pharmacological research in vitro as well as in vivo has been widely used to demonstrate the potential of the extracts from the leaves for the co-treatment of different ailments with high prevalence worldwide, upholding the traditional medicine in cases such as diabetes mellitus, cardiovascular diseases, cancer, and parasitic infections...
April 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28435376/comparative-evaluation-of-antimicrobial-efficacy-of-an-alternative-natural-agent-for-disinfection-of-toothbrushes
#2
R Vignesh, C Vishnu Rekha, Parisa Norouzi Baghkomeh, Sankar Annamalai, Ditto Sharmin
OBJECTIVE: The aim of this study was to assess the antimicrobial potency of aqueous extract of Psidium guajava leaves in two different concentrations as a toothbrush disinfectant against three oral bacterial species. MATERIALS AND METHODS: Aqueous extracts of P. guajava leaves were prepared at 20% and 30% concentrations and 0.2% chlorhexidine was used as control. The toothbrushes were equally divided into 9 groups with 10 toothbrushes per disinfectant, which were contaminated with Streptococcus mutans, Lactobacillus acidophilus, and Enterococcus faecalis...
January 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28432317/psiguajadials-a-k-unusual-psidium-meroterpenoids-as-phosphodiesterase-4-inhibitors-from-the-leaves-of-psidium-guajava
#3
Gui-Hua Tang, Zhen Dong, Yan-Qiong Guo, Zhong-Bin Cheng, Chu-Jun Zhou, Sheng Yin
Bioassay-guided fractionation of the ethanolic extract of the leaves of Psidium guajava led to the isolation of 11 new Psidium meroterpenoids, psiguajadials A-K (1-11), along with 17 known ones (12-28). Their structures and absolute configurations were elucidated by spectroscopic methods and comparison of experimental and calculated ECD. Compounds 1 and 2 represent two unprecedented skeletons of 3,5-diformyl-benzyl phloroglucinol-coupled sesquiterpenoid, while 3 is the first example of Psidium meroterpenoids coupling via an oxepane ring...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28365386/antibacterial-function-of-herbal-extracts-on-growth-survival-and-immunoprotection-in-the-black-tiger-shrimp-penaeus-monodon
#4
Sheikh AftabUddin, Mohammad Abdul Momin Siddique, Shaharin Salma Romkey, William L Shelton
This study examined the effects of an herbal extract composed of nine herbs i.e Aloe vera, Andrographis pariculata, Annona squamosa, Azadirachta indica, Citrus aurantifolia, Coriandrum sativum, Ocimum sanctum, Ollium cepa and Psidium guajava on growth, survival rate and immunoprotection against pathogenic Vibrio harveyi in the tiger shrimp Penaeus monodon. The petroleum ether, methanol and N-hexen extracts of different herbal plants were selected, processed and thoroughly mixed in equal proportions and added to the shrimp diets at a concentration of 1...
March 29, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28362985/relationship-between-psidium-species-myrtaceae-by-resistance-gene-analog-markers-focus-on-nematode-resistance
#5
L R Noia, A C Tuler, A Ferreira, M F S Ferreira
Guava (Psidium guajava L.) crop is severely affected by the nematode Meloidogyne enterolobii. Native Psidium species have been reported as sources of resistance against this nematode. Knowledge on the molecular relationship between Psidium species based on plant resistance gene analogs (RGA) can be useful in the genetic breeding of guava for resistance to M. enterolobii. In this study, RGA markers from conserved domains, and structural features of plant R genes, were employed to characterize Psidium species and establish genetic proximity, with a focus on nematode resistance...
March 16, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28351513/aflatoxin-biosynthesis-control-produced-by-aspergillus-flavus-in-layer-hens-feed-during-storage-period-of-six-months
#6
S M Hassan, B Sultana, M Iqbal
Aflatoxins (AFTs) are a group of closely related toxins that are produced by different fungus species. Food and feed contamination with AFT is a worldwide health-related problem. As a result of fungal attack, the food and feed resulted in a principal socioeconomic loss and toxins produced in feed and food items harm the humans and animals in different ways. The anti-aflatoxigenic effect Psidium guajava, Ficus benghalensis, Gardenia radicans, Punica granatum and Ziziphus jujuba leaves were evaluated against aflatoxins (AFTs), produced by Aspergillus flavus in layer feed during storage...
March 25, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28340267/digital-phenotyping-for-quantification-of-genetic-diversity-in-inbred-guava-psidium-guajava-families
#7
W Krause, A P Viana, N R Cavalcante, M Ambrósio, E A Santos, H D Vieira
Digital image analysis of seeds has been used for the identification of cultivars, determination of seed color and mechanical damage, and classification of different seed sizes. The aim of the present study was to evaluate the efficiency of digital image analysis of seeds for the quantification of genetic diversity among genotypes of inbred guava (Psidium guajava L.) families. The SAS Mini equipment, which consists of a capture module and a software program for analysis, was employed for the capture and analysis of the seed images...
March 22, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28316633/medicinal-plants-from-northeastern-brazil-against-alzheimer-s-disease
#8
Alexandre Batista Penido, Selene Maia De Morais, Alan Bezerra Ribeiro, Daniela Ribeiro Alves, Ana Livya Moreira Rodrigues, Leonardo Hunaldo Dos Santos, Jane Eire Silva Alencar de Menezes
Alzheimer's disease (AD) has been linked with oxidative stress, acetylcholine deficiency in the brain, and inflammatory processes. In the northeast region of Brazil, various plants are used to treat several diseases associated with these processes; then an antioxidant test was performed with those plants in a previous work and twelve species with higher antioxidant activity were selected for AChE inhibition evaluation. The phenolic compounds content was determined by Folin-Ciocalteu test and flavonoid content with AlCl3 reagent using UV-visible spectrophotometry...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28301727/carotenoid-profile-antioxidant-capacity-and-chromoplasts-of-pink-guava-psidium-guajava-l-cv-%C3%A2-criolla%C3%A2-during-fruit-ripening
#9
Carolina Rojas-Garbanzo, Maike Gleichenhagen, Annerose Heller, Patricia Esquivel, Nadine Schulze-Kaysers, Andreas Schieber
Pigments of pericarp and pulp of pink guava (Psidium guajava L. cv. ´Criolla´) were investigated to elucidate the profile and the accumulation of main carotenoids during four stages of fruit ripening by using HPLC-DAD and APCI-MS/MS analysis. Seventeen carotenoids were identified and changes in their profile during fruit ripening were observed. The carotenoids all-trans-β-carotene, 15-cis-lycopene, and all-trans-lycopene were present in all ripening stages, but all-trans-lycopene was found to be predominant (from 63 % to 92 % of total carotenoids) and responsible for the high lipophilic antioxidant capacity determined by spectrophotometric assays...
March 16, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28286043/anthelmintic-effect-of-psidium-guajava-and-tagetes-erecta-on-wild-type-and-levamisole-resistant-caenorhabditis-elegans-strains
#10
Denia M Piña-Vazquez, Zyanya Mayoral-Peña, Maricela Gómez-Sánchez, Luis A Salazar-Olivo, Fausto Arellano-Carbajal
ETHNOPHARMACOLOGICAL RELEVANCE: Psidium guajava and Tagetes erecta have been used traditionally to treat gastrointestinal parasites, but their active metabolites and mechanisms of action remain largely unknown. AIM OF THE STUDY: To evaluate the anthelmintic potential of Psidium guajava and Tagetes erecta extracts on Levamisole-sensitive and Levamisole-resistant strains of the model nematode Caenorhabditis elegans. MATERIALS AND METHODS: Aqueous extracts of Psidium guajava (PGE) and Tagetes erecta (TEE) were assayed on locomotion and egg-laying behaviors of the wild-type (N2) and Levamisole-resistant (CB193) strains of Caenorhabditis elegans...
March 7, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28217823/novel-insight-from-computational-virtual-screening-depict-the-binding-potential-of-selected-phytotherapeutics-against-probable-drug-targets-of-clostridium-difficile
#11
Suman Kamath, Sinosh Skariyachan
This study explores computational screening and molecular docking approaches to screen novel herbal therapeutics against probable drug targets of Clostridium difficile. The essential genes were predicted by comparative genome analysis of C. difficile and best homologous organisms using BLAST search at database of essential genes (DEG). The functions of these genes in various metabolic pathways were predicted and some of these genes were considered as potential targets. Three major proteins were selected as putative targets, namely permease IIC component, ABC transporter and histidine kinase...
February 20, 2017: Interdisciplinary Sciences, Computational Life Sciences
https://www.readbyqxmd.com/read/28166947/effects-of-heat-stress-on-some-reproductive-parameters-of-male-cavie-cavia-porcellus-and-mitigation-strategies-using-guava-psidium-guajava-leaves-essential-oil
#12
Ferdinand Ngoula, Maryvonne Guemdjo Tekam, Augustave Kenfack, Cyrille D'Alex Tadondjou Tchingo, Sandrine Nouboudem, Herman Ngoumtsop, Borice Tsafack, Alexis Teguia, Pierre Kamtchouing, Marco Galeotti, Joseph Tchoumboue
Climate changes, particularly the increase of temperature are among the main causes behind the decline of fertility in humans as well as animals. In this study, the effects of heat stress on some reproductive parameters of male cavies and mitigation strategies using guava leaves essential oil (GLEO) were studied. For this purpose, 40 male cavies aged 2.5-3 months and weighing between 348 and 446g were divided into 4 groups of 10 animals each and subjected to the following temperatures: Ambient temperature (20-25°C) for the control group, 35°C for group 1, 45°C for group 2 and 45°C+100µl GLEO/kg body weight, administered by gavage to animals for group 3...
February 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28163963/evaluation-of-the-potential-effect-of-allium-sativum-momordica-charantia-eugenia-jambolana-ocimum-sanctum-and-psidium-guajava-on-intestinal-p-glycoprotein-in-rats
#13
Devendra Kumar, Neerja Trivedi, Rakesh K Dixit
AIMS/BACKGROUND: This study was evaluated synergistic effect of a polyherbal formulation (PHF) of Allium sativum L., Eugenia jambolana Lam., Momordica charantia L., Ocimum sanctum Linn., and Psidium guajava L. on p-glycoprotein (Pgp) of intestine. These five herbs were traditionally used for diabetes. These herbs are commonly present in Ayurvedic product as antidiabetics in India. MATERIALS AND METHODS: PHF was prepared by five indigenous herbs. Different doses (50, 100 and 200 mg/kg/day) of were orally administered to Sprague-Dawley rats of different groups for multiple weeks except control groups...
January 2017: Journal of Intercultural Ethnopharmacology
https://www.readbyqxmd.com/read/28149166/phenolic-composition-and-medicinal-usage-of-psidium-guajava-linn-antifungal-activity-or-inhibition-of-virulence
#14
Maria F B Morais-Braga, Joara N P Carneiro, Antonio J T Machado, Débora L Sales, Antonia T L Dos Santos, Aline A Boligon, Margareth L Athayde, Irwin R A Menezes, Djair S L Souza, José G M Costa, Henrique D M Coutinho
Psidium guajava is a Myrtaceae plant whose medicinal properties are recognized in several locations. The use of teas and tinctures prepared from their leaves has been used to combat infections caused by fungi of the genus Candida. In this study, aqueous extracts of leaves and hydroethanolic were tested to verify the antifungal potential and its chemical composition has been investigated. The microbiological assays were performed by broth microdilution to determine the minimum inhibitory concentration (MIC) and from these the minimum fungicidal concentration was performed (MFC) by subculturing on solid media...
February 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28093669/genetic-diversity-and-population-structure-of-anastrepha-striata-diptera-tephritidae-in-three-natural-regions-of-southwestern-colombia-using-mitochondrial-sequences
#15
Jenny Johana Gallo-Franco, Sandra Marcela Velasco-Cuervo, Elkin Aguirre-Ramirez, Ranulfo González Obando, Nancy Soraya Carrejo, Nelson Toro-Perea
Anastrepha striata is widely distributed across the Americas and is a pest of economically important crops, especially crops of the Myrtaceae family. Insect population structures can be influenced by the presence of physical barriers or characteristics associated with habitat differences. This study evaluated the effect of the Western Andes on the population structure of A. striata. Individuals were collected from Psidium guajava fruits from three natural regions of southwestern Colombia (Pacific Coast, mountainous region and the inter-Andean valley of the Cauca River)...
February 2017: Genetica
https://www.readbyqxmd.com/read/27976180/anthelmintic-potential-of-psidium-guajava-in-sheep
#16
R Rostirolla Debiage, F M Ferreira Gonçalves, A Rodriges Pereira, R M Gonçalvez da Silva, E Yoshihara, E C Toledo de Mello Peixoto
No abstract text is available yet for this article.
December 2016: Planta Medica
https://www.readbyqxmd.com/read/27845266/psidium-guajava-l-from-ethnobiology-to-scientific-evaluation-elucidating-bioactivity-against-pathogenic-microorganisms
#17
REVIEW
Maria Flaviana B Morais-Braga, Joara Nalyda P Carneiro, Antonio Júdson T Machado, Antonia Thassya L Dos Santos, Débora L Sales, Luciene F Lima, Fernando G Figueredo, Henrique Douglas M Coutinho
ETHNOPHARMACOLOGICAL RELEVANCE: The use of popular plants has guided pharmaceutical research aimed at combating pathogenic microorganisms. Psidium guajava L. is a plant of great versatility and it has been used both as food and as a therapeutic agent. Root, bark, leaves, fruits, flowers and seeds are used for medicinal purposes, especially in infusions and decoctions for oral and topical use. P. guajava is utilized in symptomatology treatment related to organ malfunction and of diseases caused by the action of pathogenic and/or opportunistic microorganisms...
December 24, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27797217/anticancer-properties-of-psidium-guajava-a-mini-review
#18
Mariana Goncalves Correa, Jessica Soldani Couto, Anderson Junger Teodoro
Cancer is a complex disease caused by a progressive accumulation of multiple genetic mutations. Consumption of fruits is associated with lower risk of several cancers, which is mainly associated to their phytochemical content. The use of functional foods and chemopreventive compounds seems to contribute in this process, acting by mechanisms of antioxidant, anti-inflammatory, anti-angiogenic and hormonal. The Psidium Guajava has high potential functional related to pigments who are involved in the process of cancer prevention by having antioxidant activity...
2016: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/27790420/effect-of-guava-in-blood-glucose-and-lipid-profile-in-healthy-human-subjects-a-randomized-controlled-study
#19
Suchitra Kumari, R Rakavi, Manaswini Mangaraj
INTRODUCTION: The fruit of Psidium guajava (P.guajava) is known to contain free sugars yet the fruit juice showed hypoglycaemic effect. Hypoglycaemic activity of guava leaves has been well documented but not for guava fruit. AIM: So we aimed to evaluate the effect of ripe guava (with peel and without peel) fruit supplementation on blood glucose and lipid profile in healthy human subjects. MATERIALS AND METHODS: Randomized Controlled study undertaken in: 1) Baseline; 2) 6 weeks supplementation phase...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27780121/psidium-guajava-l-leaves-as-source-of-proanthocyanidins-optimization-of-the-extraction-method-by-rsm-and-study-of-the-degree-of-polymerization-by-np-hplc-fld-esi-ms
#20
Elixabet Díaz-de-Cerio, Federica Pasini, Vito Verardo, Alberto Fernández-Gutiérrez, Antonio Segura-Carretero, Maria Fiorenza Caboni
Due to the importance of the proanthocyanidins (PAs) bioactivity and its relationship with the PAs degree of polymerization (DP), an experimental design was carried out to establish the best extraction conditions in order to evaluate the proanthocyanidins content and their degree of polymerization in Psidium guajava leaves at different oxidation state. Optimal conditions achieved by response surface methodology were 50% acetone/water (v/v), 48°C, 30min, and 0% acetic acid (v/v). The highest DP has been found in the low oxidized state (DP 13 plus the polymers)...
January 30, 2017: Journal of Pharmaceutical and Biomedical Analysis
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