Compound In Green Tea Research Articles

Potential Therapeutic Targets of Epigallocatechin Gallate (EGCG), the Most Abundant Catechin in Green Tea, and Its Role in the Therapy of Various Types of Cancer.

Epigallocatechin-3-gallate (EGCG), an active compound of green tea and its role in diseases cure and prevention has been proven. Its role in diseases management can be attributed to its antioxidant and anti-inflammatory properties. The anti-cancer role of this green tea compound has been confirmed in various types of cancer and is still being under explored. EGCG has been proven to possess a chemopreventive effect through inhibition of carcinogenesis process such as initiation, promotion, and progression. In addition, this catechin has proven its role in cancer management through modulating various cell signaling pathways such as regulating proliferation, apoptosis, angiogenesis and killing of various types of cancer cells. The additive or synergistic effect of epigallocatechin with chemopreventive agents has been verified as it reduces the toxicities and enhances the anti-cancerous effects. Despite its effectiveness and safety, the implications of EGCG in cancer prevention is certainly still discussed due to a poor bioavailability. Several studies have shown the ability to overcome poor bioavailability through nanotechnology-based strategies such as encapsulation, liposome, micelles, nanoparticles and various other formulation. In this review, we encapsulate therapeutic implication of EGCG in cancer management and the mechanisms of action are discussed with an emphasis on human clinical trials.

Epigallocatechin-3-Gallate (EGCG), an Active Compound of Green Tea Attenuates Acute Lung Injury Regulating Macrophage Polarization and Krüpple-Like-Factor 4 (KLF4) Expression

Acute lung injury (ALI)/acute respiratory distress syndrome (ARDS) are serious clinical complications with a high frequency of morbidity and mortality. The initiation and amplification of inflammation is a well-known aspect in the pathogenesis of ALI and related disorders. Therefore, inhibition of the inflammatory mediators could be an ideal approach to prevent ALI. Epigallocatechin-3-gallate (EGCG), a major constituent of green tea, has been shown to have protective effects on oxidative damage and anti-inflammation. The goal of the present study was to determine whether EGCG improves phenotype and macrophage polarisation in LPS-induced ALI. C57BL/6 mice were given two doses of EGCG (15 mg/kg) intraperitoneally (IP) 1 h before and 3 h after LPS instillation (2 mg/kg). EGCG treatment improved histopathological lesions, Total Leucocyte count (TLC), neutrophils infiltration, wet/dry ratio, total proteins and myeloperoxidase (MPO) activity in LPS-induced lung injury. The results displayed that EGCG reduced LPS-induced ALI as it modulates macrophage polarisation towards M2 status. Furthermore, EGCG also reduced the expression of proinflammatory M1 mediators iNOS TNF-α, IL-1β and IL-6 in the LPS administered lung microenvironment. In addition, it increased the expression of KLF4, Arg1 and ym1, known to augment the M2 phenotype of macrophages. EGCG also alleviated the expression of 8-OHdG, nitrotyrosine, showing its ability to inhibit oxidative damage. TREM1 in the lung tissue and improved lung regenerative capacity by enhancing Ki67, PCNA and Ang-1 protein expression. Together, these results proposed the protective properties of EGCG against LPS-induced ALI in may be attributed to the suppression of M1/M2 macrophages subtype ratio, KLF4 augmentation, lung cell regeneration and regulating oxidative damage in the LPS-induced murine ALI.

Inclusion complexation of catechins-rich green tea extract by β-cyclodextrin: Preparation, physicochemical, thermal, and antioxidant properties

Green tea (Camellia sinensis) is a traditional beverage. Its ethanolic extract (GTE) is rich in catechins, has a wide range of associated health benefits. However, the commercial formulations of catechins-rich GTE are limited owing to its low thermal stability and high oxidation sensitivity. In this study, an inclusion complexes of GTE-β-cyclodextrin (GTE-β-CD) were prepared by freeze-drying. Structural characteristics of the inclusion complexes were examined using FE-SEM, XRD, FT-IR, and TGA/DTG. After inclusion complexation, the samples were analyzed by UHPLC-LTQ-Orbitrap-MS and the variation in the quantities of each identified metabolite were visualized in the heat map. Results revealed that bioactive components of GTE were successfully included in β-CD cavities and the thermal stability of GTE was increased by complexation with β-CD. Results of UHPLC-LTQ-Orbitrap-MS confirmed that β-CD had selective inclusion capacity for bioactive compounds of green tea. A variety of in-vitro antioxidant studies (DPPH, ABTS, and FRAP) revealed that the GTE-β-CD inclusion complexes contained better scavenging capacity against free radicals. Findings of the present work suggest that the GTE-β-CD inclusion complexes might have potential applications as functional ingredient and health supplement.

Tea polyphenols protect learning and memory in sleep-deprived mice by promoting AMPA receptor internalization.

Chronic sleep loss caused lots of health problems, also including cognition impairment. Tea is one of the most popular drinks when people stay up late. Nevertheless, the effects of tea on sleep deprivation-induced cognition impairment are still unclear. In the present study, we found 24-h sleep deprivation (S-DEP) increased membrane α-amino-3-hydroxy-5-methyl-4-isoxa-zolep-propionate (AMPA) receptor level through a tumor necrosis factor α (TNFα)-dependent pathway in hippocampi. Blocking elevated TNFα level can protect S-DEP mice from impaired learning ability according to behavioral test. Tea polyphenols, major active compounds in green tea, suppressed TNFα production through downregulating TNFα converting enzyme (TACE) level. Meanwhile, tea polyphenols treatment could ameliorate recognition impairment and anxiety-like behaviors in S-DEP mice. The aforementioned results demonstrate cognition protective effects of tea polyphenols in S-DEP mice model, which provide a theoretical basis for the treatments of S-DEP-induced cognition impairment by targeting the TACE/TNFα/AMPA pathway.

Anaerobic granular sludge and zero valent scrap iron (ZVSI) pre-treated with green tea as a sustainable system for conversion of CO2 to CH4

Global climate change is a worldwide concern that requires the dramatic reduction of greenhouse gases. Innovation in sustainable technologies for CO2 utilization to other high value products is therefore an emerging and rising field. It was found that CO2 as a sole carbon source can be converted to CH4 (higher than 97%) in a system consisted of anaerobic granular sludge, water and zero valent scrap iron. In this system (zero valent scrap iron, anaerobic granular sludge and CO2), pre-exposure of zero valent scrap iron to green tea resulted in a higher conversion rate and total CH4 production compared to bare zero valent scrap iron response. At the abiotic system (no anaerobic sludge) the zero valent scrap iron pre-treated with green tea also showed around 10% higher H2 production as well as higher final pH compared to zero valent scrap iron. The dominant crystalline product of the process both at the abiotic and at the biological system was siderite (FeCO3). It is likely that the formation of siderite on the zero valent scrap iron outer surface have reduced the amount of H2 release from zero valent scrap iron, shielding the substrate for methanogens. The presence of green tea compounds can form an iron-tannate complex with iron ions and this can possibly decrease or slow down the siderite layer, as a result more H2 was released when zero valent scrap iron was pre-exposed to green tea. Anaerobic spent filtered media was independently added to zero valent scrap iron to examine the effect of extracellular enzymes, however slight increase of the H2 production rate was found. The examined system combines potential solutions for two environmental problems; production of siderite derived from zero valent scrap iron for environmental applications and utilization of CH4 generated from CO2 for energy purposes.

Epigallocatechin-3-Gallate Induces Apoptosis as a TRAIL Sensitizer via Activation of Caspase 8 and Death Receptor 5 in Human Colon Cancer Cells

Though epigallocatechin-3-gallate (EGCG), a major compound of green tea, has anti-diabetes, anti-obesity, anti-inflammatory, and antitumor effects, the underlying antitumor molecular mechanism of EGCG was not fully understood so far. Here the sensitizing effect of EGCG to tumor-necrosis-factor-related apoptosis-inducing ligand (TRAIL) was examined in colorectal cancers. Cotreatment of EGCG and TRAIL synergistically enhanced cytotoxicity and sub G1 accumulation, increased the number of terminal deoxynucleotidyl transferase-dT-mediated dUTP nick end labelling (TUNEL)-positive cells in SW480 and HCT116 cells. Furthermore, this cotreatment promoted the cleavages of poly (adenosine diphosphate-ribose) polymerase (PARP) and induced caspase 8 activation compared to TRAIL or EGCG alone in SW480 and HCT116 cells. Of note, cotreatment of EGCG and TRAIL increased the expression of death receptor 5 (DR5) at protein and mRNA levels and also DR5 cell surface level in colon cancer cells. Conversely, depletion of DR5 reduced the apoptotic activity of cotreatment of EGCG and TRAIL to increase cytotoxicity, sub-G1 population and PARP cleavages in colon cancer cells. Overall, our findings provide evidence that EGCG can be a sensitizer of TRAIL via DR5 and caspase 8 mediated apoptosis in colorectal cancer cells.

The Effect of Nano-Epigallocatechin-Gallate on Oxidative Stress and Matrix Metalloproteinases in Experimental Diabetes Mellitus.

Background: The antioxidant properties of epigallocatechin-gallate (EGCG), a green tea compound, have been already studied in various diseases. Improving the bioavailability of EGCG by nanoformulation may contribute to a more effective treatment of diabetes mellitus (DM) metabolic consequences and vascular complications. The aim of this study was to test the comparative effect of liposomal EGCG with EGCG solution in experimental DM induced by streptozotocin (STZ) in rats. Method: 28 Wistar-Bratislava rats were randomly divided into four groups (7 animals/group): group 1—control group, with intraperitoneal (i.p.) administration of 1 mL saline solution (C); group 2—STZ administration by i.p. route (60 mg/100 g body weight, bw) (STZ); group 3—STZ administration as before + i.p. administration of EGCG solution (EGCG), 2.5 mg/100 g b.w. as pretreatment; group 4—STZ administration as before + i.p. administration of liposomal EGCG, 2.5 mg/100 g b.w. (L-EGCG). The comparative effects of EGCG and L-EGCG were studied on: (i) oxidative stress parameters such as malondialdehyde (MDA), indirect nitric oxide (NOx) synthesis, and total oxidative status (TOS); (ii) antioxidant status assessed by total antioxidant capacity of plasma (TAC), thiols, and catalase; (iii) matrix-metalloproteinase-2 (MMP-2) and -9 (MMP-9). Results: L-EGCG has a better efficiency regarding the improvement of oxidative stress parameters (highly statistically significant with p-values < 0.001 for MDA, NOx, and TOS) and for antioxidant capacity of plasma (highly significant p < 0.001 for thiols and significant for catalase and TAC with p < 0.05). MMP-2 and -9 were also significantly reduced in the L-EGCG-treated group compared with the EGCG group (p < 0.001). Conclusions: the liposomal nanoformulation of EGCG may serve as an adjuvant therapy in DM due to its unique modulatory effect on oxidative stress/antioxidant biomarkers and MMP-2 and -9.

Epigallocatechin Gallate Suppresses Inflammatory Responses by Inhibiting Toll-like Receptor 4 Signaling and Alleviates Insulin Resistance in the Livers of High-fat-diet Rats.

EGCG is a major pharmacological compound in green tea. Nonalcoholic fatty liver disease (NAFLD) is one of the most common liver diseases worldwide. Inflammation and insulin resistance are involved in the development of the disease. In this study, we investigated the beneficial effect of EGCG on the liver tissue of NAFLD rats induced by a high-fat diet and its underlying mechanism. Thirty Sprague-Dawley rats received a normal diet, a HFD and a HFD+EGCG. The expression levels of inflammatory signaling pathway genes (e.g., TLR4, TRAF6, IKKβ, NF-κB, TNF-α) and insulin signaling transduction pathway genes (e.g., PI3K, AKT, IRS-1, IRS-2) were detected in the liver. We observed that EGCG decreased the triglyceride (TG) concentration in rat livers and suppressed TLR4, TRAF6, IKKβ, p-IKKβ, p-NF-κB, and TNF-α levels compared with those in the HFD group, whereas PI3K, AKT, IRS-1, and IRS-2 indicators were improved. EGCG improves obesity-associated subacute hepatic inflammation states, probably through the TLR4 signaling pathway. Furthermore, EGCG also alleviated hepatic insulin resistance. These data indicate that EGCG improves NAFLD from two ways: inhibition of inflammation and improvement of insulin resistance in liver tissues.

Cytotoxic Activity of Epigallocatechin and Trans-Cinnamaldehyde in Gastric Cancer Cell Line

Introduction: Herbal medication is currently being utilized for treatment of numerous diseases, such as cancer which showed successful therapeutic efficacy in numerous studies. Epigallocatechin gallate (EGCG) is a compound of green tea that its role in tumor cell death has been reported. Likewise, trans-cinnamaldehyde (TC), the active ingredient in cinnamon oil showed anti-cancer properties in some previous studies. The aim of this study was to evaluate the cytotoxic effects of EGCC and TC on proliferation of gastric cancer cell line (AGS).Methods: AGS Cells were seeded and treated with various concentrations of EGCG and TC for 72 h and assessed for cell viability. To study the cytotoxic effect of drug in combination cases the lower doses than IC50 of EGCG and TC was utilized. The one-way analysis of variance (ANOVA) were used for statistical analysis.Results: various concentrations of EGCG and TC significantly inhibited the proliferation of AGS cells in dose dependent pattern. We found that in double combined cases cellular viability decreased in compared to IC50 of each single agents. Also, there were significant decrease in cellular viability in all single and double treated cases toward untreated cells (p&lt;0.05).Conclusion: The results of this study indicated that EGCG and TC effects on AGS cell line were significantly high and dose-dependent and might be cooperative. Double combinations of these two agents may be considered as a potential therapeutic option for gastriccancer. Further investigation should be conducted to validate these combination in gastric cancer therapy.&#x0D;

Biotechnological potential of a novel tannase-acyl hydrolase from Aspergillus sydowii using waste coir residue: Aqueous two-phase system and chromatographic techniques

Aspergillus is a large tannase-producing genus able to provide enzymes which hydrolyse condensed tannins in waste coir residues. In this work, a tannase-acyl hydrolase (TAH) obtained from Aspergillus sydowii (SIS 25) was extracted and purified by PEG/citrate aqueous two-phase system (ATPS), biochemically characterized and applied for detannification of green tea. A statistical design (23) was used to evaluate the influence of the variables: molar mass of PEG (1000–6000 g/mol), PEG concentration (20.0–24.0% w/w) and sodium citrate concentration (15–20% w/w) at pH 6.0. ATPS efficiency was confirmed by obtaining two major chromatographic peaks (by size exclusion chromatography on a Superdex-G75 at 215 nm) with a unique peak responsible for the hydrolysis of 44% of the phenolic compounds in green tea. This study is focused on the obtention of a microbial tannase purified by ATPS, with potential for debittering and clarifying fruit juices.

Effect of (−)-Epicatechin on Poorly Crystalline and Amorphous Precipitate. The Role of Green Tea Compound in the Formation of Infectious Urinary Stones

Infectious urinary stones induced to grow by urease-producing bacteria consist of aggregates of bacteria, highly crystalline struvite, and poorly crystalline and amorphous precipitate (PCaAP). The paper describes an experimental study on the influence of (−)-epicatechin, a green tea component, on the nucleation and growth of PCaAP. The crystallization process of PCaAP was performed in artificial urine, and the activity of bacteria was simulated by the addition of aqueous ammonia solution. The formation of struvite was avoided by using Mg-free artificial urine. Optical microscopy methods and spectrophotometric measurements both confirm that (−)-epicatechin promotes the nucleation and growth of PCaAP. This means that PCaAP nucleation is shifted toward a lower pH compared to the control test. The results of the experiments are explained based on the theoretical analysis of the chemical species formed in artificial urine. This chemical speciation analysis shows that the experimentally observed effects are due to the effect of (−)-epicatechin on the formation of CaCO3, CaHPO4, CaC2O4, CaCit–, and HPO42– species.

Systemic lupus erythematosus: PKCA is an inhibition pathway for mTOR by the active ingredient of green tea

This study aims to evaluate the interaction of green tea active compounds with proteins related to mTOR signals. The in silico study uses SEA protein target software, DB strings, and AUTODOCK PYRX 9.5. There are twenty target proteins that can interact with the active compounds of green tea. Of the twenty proteins, only six proteins are connected to the mTOR pathway. Of the six proteins, one that is a regulator of mTOR inhibitors is PKCA. Epigallocatechin has the strongest interaction with PKCA 4ARA (-8 kcal / mol). Cianidanol has the strongest interaction with PKCA 3IW4 (-9.3 kcal / mol). To analyze the involvement of the autophagy, a docking between ULK1 and AMPK was conducted, and there was an interaction between ULK1 and AMPK (bond energy of -1446.11 kcal). For the interaction between mTOR and ULK1, the bond energy is -624.5 kcal. For active green tea compounds, the bonding energy is more positive than the mTOR bond with ULK1. It was concluded that the green tea active ingredient as an inhibitor control against mTOR through PKCA and ULK1-AMPK (autophagy pathway).

In-silico Analysis of Chemical Compounds in Green Tea Working on Activators PPAR-γ as Antiobesity

Teh hijau dikenal banyak memiliki manfaat dan umum digunakan masyarakat sebagai antiobesitas, tetapi senyawa aktif yang berpotensi sebagai antiobesitas. Tujuan penelitian untuk mencari bahwa senyawa kimia yang terdapat dalam tanaman teh hijau mempunyai aktivitas sebagai antiobesitas pada reseptor PPAR-γ. Metode penelitian dilakukan dengan cara analisis in silico melalui molecular docking terhadap senyawa yang terdapat dalam tanaman teh hijau untuk mencari senyawa aktif dan memodelkan interaksi senyawa aktif pada reseptor yang berperan sebagai antiobesitas. Software yang digunakan adalah PLANTS, YASARA, ChemSketch, dan Pymol. Mula-mula dilakukan validasi internal pada reseptor PPAR-γ dengan kode 2ATH. Proses docking dilakukan terhadap native ligand, senyawa pembanding dan masing-masing senyawa uji dengan reseptor PPAR-γ yang sama, dan senyawa pembanding yang digunakan sebagai kontrol positif ialah Pioglitazone. Hasil penelitian menunjukan sisi aktif terdapat 3 senyawa aktif dengan sisi aktif ikatan ligan pada reseptor PPAR-γ yaitu ARG288, LYS367, PHE363, HIS323, HIS449, ILE326, MET364, LEU340, CYS285, SER342. Terdapat 3 senyawa aktif yaitu epigalokatekin-3-galat, epikatekin-3-galat dan teaflavin sebagai antiobesitas dengan mekanisme kerja mengaktivasi PPAR-γ.

Simultaneous Optimal Production of Flavonol Aglycones and Degalloylated Catechins from Green Tea Using a Multi-Function Food-Grade Enzyme

(1) Background: Green tea (GT) contains well-known phytochemical compounds; namely, it is rich in flavan-3-ols (catechins) and flavonols comprising all glycoside forms. These compounds in GT might show better biological activities after a feasible enzymatic process, and the process on an industrial scale should consider enzyme specificity and cost-effectiveness. (2) Methods: In this study, we evaluated the most effective method for the enzymatic conversion of flavonoids from GT extract. One enzyme derived from Aspergillus niger (molecular weight 80–90 kDa) was ultimately selected, showing two distinct but simultaneous activities: intense glycoside hydrolase activity via deglycosylation and weak tannin acyl hydrolase activity via degalloylation. (3) Results: The optimum conditions for producing flavonol aglycones were pH 4.0 and 50 °C. Myricetin glycosides were cleaved 3.7–7.0 times faster than kaempferol glycosides. Flavonol aglycones were produced effectively by both enzymatic and hydrochloride treatment in a time-course reaction. Enzymatic treatment retained 80% (w/w) catechins, whereas 70% (w/w) of catechins disappeared by hydrochloride treatment. (4) Conclusions: This enzymatic process offers an effective method of conditionally producing flavonol aglycones and de-galloylated catechins from conversion of food-grade enzyme.

Nutritional applications and beneficial health applications of green tea and l-theanine in some animal species: A review.

Green tea (Camellia sinensis) is a popular herbal plant with abundant health benefits, and thus, it has been used as a potent antioxidant for a long time. Based on the available literature, the diversity and the availability of multifunctional compounds in green tea offer its noteworthy potential against many diseases such as liver and heart diseases, inflammatory conditions and different metabolic syndromes. Owing to its bioactive constituents including caffeine, amino acids, l-theanine, polyphenols/flavonoids and carbohydrates among other potent molecules, green tea has many pharmacological and physiological effects. The effects of green tea include anti-oxidative, anti-inflammatory, anti-arthritic, anti-stress, hypolipidaemic, hypocholesterolaemic, skin/collagen protective, hepatoprotective, anti-diabetic, anti-microbial, anti-infective, anti-parasitic, anti-cancerous, inhibition of tumorigenesis and angiogenesis, anti-mutagenic, and memory and bone health-improving activities. Apart from its utilization in humans, green tea has also played a significant role in livestock production such as in dairy, piggery, goatry and poultry industries. Supplementation of animal feeds with green tea and its products is in line with the modern concepts of organic livestock production. Hence, incorporating green tea or green tea by-products into the diet of poultry and other livestock can enhance the value of the products obtained from these animals. Herein, an effort is made to extend the knowledge on the importance and useful applications of green tea and its important constituents in animal production including poultry. This review will be a guideline for researchers and entrepreneurs who want to explore the utilization of feeds supplemented with green tea and green tea by-products for the enhancement of livestock production.

Multilevel structure\u2013activity profiling reveals multiple green tea compound families that each modulate ubiquitin-activating enzyme and ubiquitination by a distinct mechanism

We developed and implemented a reconstituted system to screen for modulators of the ubiquitination of proliferating cell nuclear antigen, a process that activates pathways of DNA damage tolerance and drug resistance. We identified the primary putatively health-beneficial green tea polyphenol epigallocatechin gallate (EGCG) and certain related small molecules as potent inhibitors of ubiquitination. EGCG directly and reversibly targets the ubiquitin-activating enzyme Uba1, blocking formation of the Uba1~ubiquitin thioester conjugate and thus ubiquitination and in the cell. Structure–activity relationship profiles across multiple biochemical and cellular assays for a battery of EGCG analogues revealed distinct chemical and mechanism-of-action clusters of molecules, with catechin gallates, alkyl gallates, and myricetin potently inhibiting ubiquitination. This study defines a number of related though distinct first-in-class inhibitors of ubiquitination, each series with its own unique activity pattern and mechanistic signature.

Review of the Role of Fluid Dairy in Delivery of Polyphenolic Compounds in the Diet: Chocolate Milk, Coffee Beverages, Matcha Green Tea, and Beyond

Abstract Dairy-based functional beverages have been a growing segment as consumer demands for health foods have shifted focus from simply enhancing lifespan to protecting health. Green tea is often limited in use because of poor bioavailability and disagreeable taste. However, milk is considered an ideal platform for the delivery of active polyphenolic compounds in green tea. Furthermore, the antioxidant enzymatic activity and antioxidant index of polyphenols in green tea have been known to be protected through interaction with dairy proteins inside the unstable intestinal environment. In addition, consumption of green tea infused with milk has been found to have a significant impact on reducing skin wrinkles and roughness in elderly subjects, through a decrease in lipid peroxidation and a concomitant reduction in oxidative stress. A similar affinity has been observed between antioxidants in coffee and milk proteins. Dark chocolate has been known to contain significant phenolic content and antioxidant activity. The activation of protein complex NF-κB, which is responsible for cell survival, was found to be significantly reduced upon consumption of cocoa with water, whereas consuming cocoa with milk had no effect on the bioavailability of the phenolic compounds in cocoa. The popularity of dairy as the source for polyphenol fortified beverages in the diet will be dictated by optimization of the technology for maximizing the bioavailability of the antioxidants.

IMPACT OF NABICATE ON MORPHOLOGICAL BIOCHEMICAL PARAMETERS OF EUROPEAN CARP

The paper reveals the scientific and research experience when exploring the impact of Nabikat (nanobiological catalyst, a product of mechanochemical synthesis of silicon compounds of rice husks and green tea, produced by the Centre for Technology Implementation inNovosibirsk) on the carp organism. The experiment was conducted in May-November of 2017 at Troitsk Fish Factory. The researchers selected 500 specimens of Scaly Carp of which 2 similar groups were arranged. The first group served as a control group and received the feed from the fish factory, while the second group of carps received Nabikat dosed2 kgper 1 ton of feed. The researchers took blood of 10 fish from each group for morphological biochemical analysis. Hematological analysis included the following indicators exploring: hemoglobin content, number of red blood cells and total number of leukocytes. The researchers determined total protein, albumins, urea, glucose, total lipids, calcium, phosphorus and magnesium as biochemical parameters. All the indicators were within the standard before the experiment, except for albumins and calcium, which concentrations were low. When applying Nabikat, the authors observed changes of the main microelements in the blood: lower calcium concentration by 20.68% (P&lt;0.001), magnesium – by 8.51% and higher phosphorus concentration in comparison with the control group. The carps of the experimental group had higher concentrations of albumins by 10.08%, erythrocytes by 4.76 and haemoglobin by 31.51% compared to the control group. Application of Nabikat results in improvement of physiological and biochemical blood parameters of the fish from the experimental group. This was revealed in facilitating of the blood respiratory function.

Evaluation of the effects of L-Theanine on neurobehavior in an adult male Sprague-Dawley Rat Model of PTSD

Post-traumatic stress disorder (PTSD) continues to be one of the most common mental health disorders in the United States and may occur in response to traumatic experiences. Currently, there are no interventions that prevent the development of PTSD. L-Theanine (L-Th), a major compound in green tea has been found to decrease anxiety and prevent memory impairment and may have potential effects in the prevention of PTSD. Sixty rats were divided into six experimental groups: control vehicle, control L-Th, control naïve, PTSD vehicle, PTSD Pre-L-Th (prophylactic), PTSD Post-L-Th (non-prophylactic). PTSD was induced by a 3-day restraint/tail shock stress model. The effects of L-Th on neurobehavior were evaluated by Elevated Plus-Maze (EPM), Morris Water Maze (MWM), and Forced Swim Test (FST). Our study found that the total food intake weight of PTSD Pre-L-Th (prophylactic) rats were significantly increased compared to that of PTSD vehicle rats (p = .04). Administration of L-Th 24 hours before the initial PTSD event or for 10 days following the last PTSD stress event did not statistically improve mean open arm exploration on the EPM, spatial memory, and learning in the MWM or behavioral despair measured by the FST (p &gt; 0.05). Although the 3-day restraint/tail shock stress model caused stress in the rodents, it did not produce reported PTSD-like anxiety and depression or spatial memory loss. The effect of Pre-L-Th or Post-L-Th treatment, on the neurobehavioral functions could not be effectively evaluated. However, this study provides a foundation for future studies to try different rodent PTSD models to induce PTSD-like neurobehavioral impairments to explore dosage, frequency, as well as the duration of L-Th administration before and/or after the post-traumatic event. The 3-day restraint/tail shock stress model caused stress in the rodents, Pre-L-Theanine treatment preconditioned the PTSD rats to endure stress.

Anti-osteoclastogenic effect of epigallocatechin gallate-functionalized gold nanoparticles in vitro and in vivo.

Background: Epigallocatechin gallate (EGCG), the major anti-inflammatory compound in green tea, has been shown to suppress osteoclast (OC) differentiation. However, the low aqueous solubility of EGCG always leads to poor bioavailability, adverse effects, and several drawbacks for clinical applications.Purpose: In this study, we synthesized EGCG-capped gold nanoparticles (EGCG-GNPs) to solve the drawbacks for clinical uses of EGCG in bone destruction disorders by direct reduction of HAuCl4 in EGCG aqueous solution.Methods and Results: The obtained EGCG-GNPs were negatively charged and spherical. Theoretical calculation results suggested that EGCG was released from GNPs in an acidic environment. Cellular uptake study showed an obviously large amount of intracellular EGCG-GNPs without cytotoxicity. EGCG-GNPs exhibited better effects in reducing intracellular reactive oxygen species levels than free EGCG. A more dramatic anti-osteoclastogenic effect induced by EGCG-GNPs than free EGCG was observed in lipopolysaccharide (LPS)-stimulated bone marrow macrophages, including decreased formation of TRAP-positive multinuclear cells and actin rings. Meanwhile, EGCG-GNPs not only suppressed the mRNA expression of genetic markers of OC differentiation but also inhibited MAPK signaling pathways. Furthermore, we confirmed that EGCG-GNPs greatly reversed bone resorption in the LPS-induced calvarial bone erosion model in vivo, which was more effective than applying free EGCG, specifically in inhibiting the number of OCs, improving bone density, and preventing bone loss.Conclusion: EGCG-GNPs showed better anti-osteoclastogenic effect than free EGCG in vitro and in vivo, indicating their potential in anti-bone resorption treatment strategy.