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https://www.readbyqxmd.com/read/29791784/chitosan-hydrogels-and-bionanocomposites-formed-through-the-mineralization-and-regulated-charging
#1
REVIEW
Irina Postnova, Vladimir Silant'ev, Sergei Sarin, Yury Shchipunov
The account presents survey of our systematic studies on chitosan. Only this polysaccharide bears cationic charges, possesses antimicrobial activity and wound healing ability that make it highly appropriate for using in medicine, biomedical engineering, cosmetics, food, packaging. However, its application meets with severe limitation. Chitosan belongs to polysaccharides that do not jellify solutions. Main approaches are based on the chemical modifications and cross-linking, but these treatments impairs therewith the biocompatibility and biological activity of chitosan...
May 23, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29790516/ultrafast-excited-state-decay-of-natural-uv-filters-from-intermolecular-hydrogen-bonds-to-a-conical-intersection
#2
Peter S Sherin, Yuri P Tsentalovich, Eric Vauthey, Enrico Benassi
Kynurenines (KNs) are natural UV filters of the human eye lens, protecting the eye tissues from solar UV radiation. Key points of their effective protection are the intramolecular charge transfer (ICT) in the excited state and the fast dissipation of absorbed light energy into heat via the intermolecular H-bonds. Herein we report that the introduction of an unsaturated double bond in the amino acid side chain, operating as an ICT-enhancing electron donor group, drastically accelerates the internal conversion (IC) due to a conical intersection (CI) between the potential energy surfaces of the excited and ground states...
May 23, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29785774/thymol-thyme-and-other-plant-sources-health-and-potential-uses
#3
REVIEW
Bahare Salehi, Abhay Prakash Mishra, Ila Shukla, Mehdi Sharifi-Rad, María Del Mar Contreras, Antonio Segura-Carretero, Hannane Fathi, Nafiseh Nasri Nasrabadi, Farzad Kobarfard, Javad Sharifi-Rad
Thymol is a naturally occurring phenol monoterpene derivative of cymene and isomer of carvacrol. Thymol (10-64%) is one of the major constituent of essential oils of thyme (Thymus vulgaris L., Lamiaceae), a medicinal plant with several therapeutic properties. This plant, native to Mediterranean regions, is commonly used as a culinary herb and also with a long history of use for different medicinal purposes. Nowadays, thymol and thyme present a wide range of functional possibilities in pharmacy, food, and cosmetic industry...
May 22, 2018: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29783752/pro-apoptotic-and-anti-cancer-properties-of-diosgenin-a-comprehensive-and-critical-review
#4
REVIEW
Gautam Sethi, Muthu K Shanmugam, Sudha Warrier, Myriam Merarchi, Frank Arfuso, Alan Prem Kumar, Anupam Bishayee
Novel and alternative options are being adopted to combat the initiation and progression of human cancers. One of the approaches is the use of molecules isolated from traditional medicinal herbs, edible dietary plants and seeds that play a pivotal role in the prevention/treatment of cancer, either alone or in combination with existing chemotherapeutic agents. Compounds that modulate these oncogenic processes are potential candidates for cancer therapy and may eventually make it to clinical applications. Diosgenin is a naturally occurring steroidal sapogenin and is one of the major bioactive compounds found in dietary fenugreek ( Trigonella foenum-graecum ) seeds...
May 19, 2018: Nutrients
https://www.readbyqxmd.com/read/29782308/activation-of-herpes-simplex-infection-after-tattoo
#5
Antigona Begolli Gerqari, Mybera Ferizi, Merita Kotori, Aferdita Daka, Syzana Hapciu, Ilir Begolli, Mirije Begolli, Idriz Gerqari
Tattooing is a procedure where ink is applied to an area of the skin, mostly intraepidermally (1). This procedure is carried out mainly for aesthetic purposes. Lately, it has been used as a corrective medical procedure following amputation of mammilla. The procedure is aggressive (2), and the fact that skin is punctured many times with the same needle which cannot be fully sterilized may cause infection of the treated area with bacterial, fungal, or viral agents that may lead to health consequences manifesting in the form of verrucae vulgaris, molluscum contagiosum, and herpes simplex...
April 2018: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/29779613/facial-plastic-surgery-in-the-geriatric-population
#6
REVIEW
Ian Newberry, Eric W Cerrati, J Regan Thomas
Greater life expectancy with advancements in technology and medicine has led to an increasing interest in facial rejuvenation. Facial aging is an inevitable process that largely results from soft tissue descent and volumetric deflation. However, a comprehensive knowledge of the aging process and precise assessment of the exact pathologies yielding the patient's senescent appearance is essential to produce the best cosmetic outcome. The surgeon must evaluate each region independently and the aging face as a whole to ensure a pleasing, natural appearance...
May 17, 2018: Otolaryngologic Clinics of North America
https://www.readbyqxmd.com/read/29779217/ginsenoside-c-mx-isolated-from-notoginseng-stem-leaf-ginsenosides-attenuates-ultraviolet-b-mediated-photoaging-in-human-dermal-fibroblasts
#7
Xiao-Yi Liu, Eunson Hwang, Bom Park, Hien T T Ngo, Yong-Kun Xiao, Tae-Hoo Yi
Notoginseng is a traditional herbal medicine widely used for medicinal therapy in Asia, as it contains numerous ginsenosides with pharmacological effects. In this study, we submitted Notoginseng stem-leaf (NGL) ginsenosides to an enzyme to create reaction the monomer products of ginsenoside C-Mx and then investigated the ability of ginsenoside C-Mx to protect the skin against ultraviolet B-induced injury in normal human dermal fibroblasts (NHDFs). Ginsenoside C-Mx alleviated UVB-induced intracellular reactive oxygen species (ROS), MMP-1, and IL-6 expression while accelerating TGF-β and procollagen type I secretion...
May 20, 2018: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/29773393/comparative-study-of-physicochemical-properties-and-bioactivity-of-hericium-erinaceus-polysaccharides-at-different-solvent-extractions
#8
Jing-Kun Yan, Zhi-Chao Ding, Xianli Gao, Yao-Yao Wang, Yan Yang, Di Wu, He-Nan Zhang
In this study, hot water, 0.9% NaCl, citric acid, and 1.25 M NaOH/0.05% NaBH4 were separately used for the extraction of water-soluble H. erinaceus polysaccharides (HEPs; HEP-W, HEP-S, HEP-C, and HEP-A) from the fruit body of Hericium erinaceus. The physicochemical properties and biological activities were then investigated and compared. Results showed that the extraction solvents exhibited significant effects on the extraction yields, molecular weights, monosaccharide compositions, preliminary structural characteristics, microstructures of HEPs and on their contents, such as neutral sugar, uronic acid, protein, and β-(1 → 3)-glucan...
August 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29773013/critical-review-on-curcumin-as-a-therapeutic-agent-from-traditional-herbal-medicine-to-an-ideal-therapeutic-agent
#9
Muhammad Usman Akbar, Kanwal Rehman, Khalid Mahmood Zia, Muhammad Imran Qadir, Muhammad Sajid Hamid Akash, Muhammad Ibrahim
Traditionally, many natural medicinal plants have been used to treat a variety of diseases since ancient times and are considered a potential source of phytochemicals for the development of new drugs. One of these is curcumin, which is an easily accessible, inexpensive, and nontoxic bioactive compound. Curcumin is a very important, naturally occurring, and highly lipophilic and phenolic substance derived from the rhizomes of plant Curcuma longa, a member of the Zingiberaceae (ginger) family, which is mostly used as a curry spice, flavoring agent, insect repellent, coloring agent in food, traditional drug, and ingredient in cosmetics...
2018: Critical Reviews in Eukaryotic Gene Expression
https://www.readbyqxmd.com/read/29766648/synthesis-of-new-benzimidazole-1-2-3-triazole-hybrids-as-tyrosinase-inhibitors
#10
Mohammad Mahdavi, Arsalan Ashtari, Mahsima Khoshneviszadeh, Sara Ranjbar, Ameneh Dehghani, Tahmineh Akbarzadeh, Bagher Larijani, Mehdi Khoshneviszadeh, Mina Saeedi
A novel series of benzimidazole-1,2,3-triazole hybrids containing substituted benzyl moieties were designed, synthesized and evaluated for their inhibitory activity against mushroom tyrosinase. The results indicated that 2-(4-((1-(3,4-dichlorobenzyl)-1H-1,2,3-triazol-4-yl)methoxy)phenyl)-1H-benzo[d]imidazole (6g) and 2-(4-((1-(4-bromobenzyl)-1H-1,2,3-triazol-4-yl)methoxy)phenyl)-1H-benzo[d]imidazole (6h) exhibited effective inhibitory activity with IC50 values of 9.42 and 10.34 μM, respectively, comparable to that of kojic acid as the reference drug (IC50 = 9...
May 15, 2018: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29766316/influence-of-harvest-stage-on-the-pharmacological-effect-of-angelica-dahurica
#11
Wei-Hong Liang, Tung-Wu Chang, Yuh-Chyang Charng
BACKGROUND: Baizhi (Angelica dahurica) has been widely used as a traditional Chinese herbal medicine, functional food and cosmetic product ingredient, mostly because of the high furanocoumarin compounds in roots. The cropping system of Baizhi with its unique summer dormancy feature, is easily affected by the transition of its growth stages. The aim of this study was to analyze the quantity (size, form and dry weight [DW]) and quality (antioxidant and furanocoumarin content) of taproot and lateral root from three growth stages of Baizhi; vegetative (V-stage), summer dormancy (S-stage) and bolting stage (B-stage)...
May 15, 2018: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/29753011/insights-into-hydrolysis-versus-transfructosylation-mutagenesis-studies-of-a-novel-levansucrase-from-brenneria-sp-enid312
#12
Wei Xu, Dawei Ni, Shuhuai Yu, Tao Zhang, Wanmeng Mu
Levan is a kind of fructan that composing of fructose by β-(2, 6) linkage and has been already applied as thickening agent and colloidal stabilizer in the cosmetic, medicinal and food industries. Microbial levansucrase is a key enzyme catalyzing the formation of levan from sucrose by transfructosylation. Here, a gene encoding levansucrase from Brenneria sp. EniD312 was cloned and expressed in Escherichia coli. The recombinant levansucrase showed the optimal pH and temperature at pH 6.5 and 45 °C. The enzyme produced 85 g/L levan from 250 g/L sucrose at pH 6...
May 9, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29748818/the-biotechnology-genetic-transformation-and-molecular-biology-of-bixa-orellana-l-achiote
#13
REVIEW
Jaime A Teixeira da Silva, Judit Dobránszki, Renata Rivera-Madrid
Genetic transformation allows for greater bixin or norbixin production in achiote. Knowledge of genes that control the biosynthesis of these important secondary metabolites will allow for targeted amplification in transgenic plants. Annatto is a natural dye or coloring agent derived from the seeds, or their arils, of achiote (Bixa orellana L.), and is commercially known as E160b. The main active component of annatto dye is water-insoluble bixin, although water-soluble norbixin also has commercial applications...
May 10, 2018: Planta
https://www.readbyqxmd.com/read/29746684/prediction-understanding-and-medicine
#14
Alex Broadbent
What is medicine? One obvious answer in the context of the contemporary clinical tradition is that medicine is the process of curing sick people. However, this "curative thesis" is not satisfactory, even when "cure" is defined generously and even when exceptions such as cosmetic surgery are set aside. Historian of medicine Roy Porter argues that the position of medicine in society has had, and still has, little to do with its ability to make people better. Moreover, the efficacy of medicine for improving population health has been famously doubted by historians and epidemiologists...
May 9, 2018: Journal of Medicine and Philosophy
https://www.readbyqxmd.com/read/29742197/antifungal-and-antioxidant-activities-of-mature-leaves-of-myrcia-splendens-sw-dc
#15
F C Pontes, V C P Abdalla, M Imatomi, L F G Fuentes, S C J Gualtieri
In recent years, natural products with antifungal and antioxidant activities are being increasingly researched for a more sustainable alternative to the chemicals currently used for the same purpose. The plant pathogenic fungus Alternaria alternata is a causative agent of diseases in citrus, leading to huge economic losses. Antioxidants are important for the production of medicines for various diseases that may be related to the presence of free radicals, such as cancer, and in the cosmetic industry as an anti-aging agent and the food industry as preservatives...
May 7, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/29731629/nanosized-titanium-dioxide-induced-premature-ovarian-failure-is-associated-with-abnormalities-in-serum-parameters-in-female-mice
#16
Fashui Hong, Ling Wang
Background: Exposure to titanium dioxide nanoparticles (TiO2 NPs) that are widely used in food, medicine, sunscreen products and cosmetics is reported to cause ovarian damage and lower fertility in animals. However, the potential effects of TiO2 NPs application on premature ovarian failure (POF) have rarely been evaluated to date. Methods: In this study, female mice were continuously exposed to TiO2 NPs at doses of 2.5, 5 or 10 mg/kg via gavage instillation for 30 days, and investigated the serum hormones and autoimmunity markers associated with POF...
2018: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29729962/in-vitro-effects-of-origanum-vulgare-leaf-extracts-on-gilthead-seabream-sparus-aurata-l-leucocytes-cytotoxic-bactericidal-and-antioxidant-activities
#17
José María García Beltrán, Cristóbal Espinosa, Francisco A Guardiola, M Ángeles Esteban
Origanum vulgare is a well-known medicinal plant that has been used since ancient times as an additive in foods and cosmetic preparations. The possible application of O. vulgare extracts in fish was assessed by using gilthead seabream (Sparus aurata) as a marine fish model due to its importance in aquaculture. The in vitro effects of aqueous and ethanolic leaf extracts of O. vulgare were tested in order to observe any immunostimulant, cytotoxic, bactericidal or antioxidant properties. The results showed that medium or high concentration of aqueous extracts and low concentrations of ethanolic extract, increased head kidney leucocyte activities as well as the number of SAF-1 cells...
May 3, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29726285/human-macrophage-responses-to-metal-oxide-nanoparticles-a-review
#18
Camila Figueiredo Borgognoni, Joo Hyoung Kim, Valtencir Zucolotto, Harald Fuchs, Kristina Riehemann
Nanomaterials have been widely used in our daily lives in medicine, cosmetics, paints, textiles and food products. Many studies aim to determine their biological effects in different types of cells. The interaction of these materials with the immune system leads to reactions by modifying the susceptibility or resistance of the host body which could induce adverse health effects. Macrophages, as specific cells of the innate immune response, play a crucial role in the human defence system to foreign agents. They can be used as a reliable test object for the investigation of immune responses under nanomaterials exposure displayed by expression of a variety of receptors and active secretion of key signalling substances for these processes...
May 4, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29724298/inhibitory-effect-of-berberine-from-coptidis-rhizoma-on-melanin-synthesis-of-murine-malignant-melanoma
#19
Yonghwa Lee, Lichao Liu, Yongsub Yi
Berberine has abundant beneficial properties including anti-cancer effects. In the present study, we examined the inhibitory effect of berberine on α-melanocyte-stimulating hormone (α-MSH)-induced melanogenesis in B16F1 melanoma cells. The results showed that berberine decreased the expression of tyrosinase and microphthalmia-associated transcription factor (MITF) in a dose-dependent manner. In order to observe the potential target for the inhibitory effect of berberine, we examined the effect of berberine on TRP-1 and TRP-2...
May 1, 2018: Die Pharmazie
https://www.readbyqxmd.com/read/29718956/a-reliable-and-validated-lc-ms-ms-method-for-the-simultaneous-quantification-of-4-cannabinoids-in-40-consumer-products
#20
Qingfang Meng, Beth Buchanan, Jonathan Zuccolo, Mathieu-Marc Poulin, Joseph Gabriele, David Charles Baranowski
In the past 50 years, Cannabis sativa (C. sativa) has gone from a substance essentially prohibited worldwide to one that is gaining acceptance both culturally and legally in many countries for medicinal and recreational use. As additional jurisdictions legalize Cannabis products and the variety and complexity of these products surpass the classical dried plant material, appropriate methods for measuring the biologically active constituents is paramount to ensure safety and regulatory compliance. While there are numerous active compounds in C...
2018: PloS One
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