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https://www.readbyqxmd.com/read/28737286/unexpected-chiro-thermoresponsive-behavior-of-helical-poly-phenylacetylene-s-bearing-elastin-based-side-chains
#1
Sandra Arias, Felix Freire, Marcelo Calderon, Julian Bergueiro
The thermoresponsive behavior of an elastin based polymer can be altered by the polymeric macromolecular conformation. Thus, when the elastin basic amino-acid sequence VPGVG is used as a pendant group of a poly(phenylacetylene) (PPA) its thermoresponsivity in water can be remotely detected due to conformational changes on the formed helix. Circular dichroism at different temperatures show an inversion of the first Cotton effect (450 nm) at 25.8 ºC that matches with the cloud point temperature. Interestingly, this elastin-based side-chain PPA shows an upper critical solution temperature with low pH and concentration dependency, not expected in elastin based polymers...
July 24, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28724181/finding-the-best-therapeutic-approach-for-pcos-the-importance-of-inositol-s-bioavailability
#2
B Orrù, R Circo, P Logoteta, S Petousis, G Carlomagno
Broadening clinical evidence has markedly designated inositol(s) as a common and effective therapeutic approach for PCOS and infertility. Although considerable research has been focused on the use in clinical practice of myo-inositol (myo-ins) and D-chiro-inositol (D-chiro-ins), the two major inositol stereoisomers, less attention has been paid to their bioavailability. Therefore, the aim of this paper is to gather and analyze information on inositol(s) bioavailability, to better delineate its optimal concentration for scientific and clinical purposes...
June 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28714347/antifungal-activities-and-active-ingredients-of-melodinus-suaveolens-champ-ex-benth
#3
Yanan Xu, Siquan Ling, Dongqiang Zeng, Wenwei Tang
Four Melodinus species with antifungal activity were found in survey of the floral resources, in Shiwan Mountain Natural Reserve, Guangxi Province, China. Crude methanolic extracts of the twigs and leaves of Melodinus suaveolens exhibited potent antifungal activities against the plant pathogenic fungi Colletotrichum musae, Colletotrichum graminicola, Colletotrichum gloeosporioides and Alternaria musae, and the ethyl acetate fraction inhibited these pathogens at rates of 85.37, 91.47, 72.77 and 89.87%, respectively (5 mg/mL)...
July 16, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28693424/bacillus-subtilis-iolq-dega-is-a-transcriptional-repressor-of-iolx-encoding-nad-dependent-scyllo-inositol-dehydrogenase
#4
Dong-Min Kang, Christophe Michon, Tetsuro Morinaga, Kosei Tanaka, Shinji Takenaka, Shu Ishikawa, Ken-Ichi Yoshida
BACKGROUND: Bacillus subtilis is able to utilize at least three inositol stereoisomers as carbon sources, myo-, scyllo-, and D-chiro-inositol (MI, SI, and DCI, respectively). NAD(+)-dependent SI dehydrogenase responsible for SI catabolism is encoded by iolX. Even in the absence of functional iolX, the presence of SI or MI in the growth medium was found to induce the transcription of iolX through an unknown mechanism. RESULTS: Immediately upstream of iolX, there is an operon that encodes two genes, yisR and iolQ (formerly known as degA), each of which could encode a transcriptional regulator...
July 11, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28642705/polycystic-ovary-syndrome-insights-into-the-therapeutic-approach-with-inositols
#5
REVIEW
Maria A Sortino, Salvatore Salomone, Michele O Carruba, Filippo Drago
Polycystic ovary syndrome (PCOS) is characterized by hormonal abnormalities that cause menstrual irregularity and reduce ovulation rate and fertility, associated to insulin resistance. Myo-inositol (cis-1,2,3,5-trans-4,6-cyclohexanehexol, MI) and D-chiro-inositol (cis-1,2,4-trans-3,5,6-cyclohexanehexol, DCI) represent promising treatments for PCOS, having shown some therapeutic benefits without substantial side effects. Because the use of inositols for treating PCOS is widespread, a deep understanding of this treatment option is needed, both in terms of potential mechanisms and efficacy...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28544572/inositol-treatment-of-anovulation-in-women-with-polycystic-ovary-syndrome-a-meta-analysis-of-randomised-trials
#6
REVIEW
J Pundir, D Psaroudakis, P Savnur, P Bhide, L Sabatini, H Teede, A Coomarasamy, S Thangaratinam
Polycystic ovary syndrome is a common cause of anovulation and infertility, and a risk factor for development of metabolic syndrome and endometrial cancer. Systematic review and meta-analysis of randomised controlled trials (RCT) that evaluated the effects of inositol as an ovulation induction agent. We searched MEDLINE, EMBASE, Cochrane and ISI conference proceedings, Register and Meta-register for RCT and WHO trials' search portal. We included studies that compared inositol with placebo or other ovulation induction agents...
May 24, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28501026/metabolically-speaking-possible-reasons-behind-the-tolerance-of-sugar-belle-mandarin-hybrid-to-huanglongbing
#7
Nabil Killiny, Maria Filomena Valim, Shelley E Jones, Ahmad A Omar, Faraj Hijaz, Fred G Gmitter, Jude W Grosser
Huanglongbing (HLB) is currently considered the most destructive disease of citrus. Since its spread to the Americas, HLB has killed millions of trees and caused a sharp decline in production in many citrus growing regions. With the continuous spread of HLB disease in Florida and worldwide, there is an urgent need for the development of commercial citrus cultivars with a strong tolerance to HLB. Interestingly, field observations showed that some of the recently released mandarin hybrids such as 'Sugar Belle' were tolerant to HLB...
May 4, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28452458/chiro-optical-modulation-for-nurr1-production-from-stem-cells
#8
Madhumita Patel, Hyo Jung Moon, Ja Hye Hong, Byeongmoon Jeong
Nuclear receptor related 1 (NURR1) is an essential protein for maintenance of dopaminergic neurons in adult midbrain of which deficiency leads to Parkinson's disease. To enhance the NURR1 production of neural cells, various approaches are under investigation. Here we report that NURR1 is highly expressed in stem cells by exposure to an L-polarized blue light emitting diode (LED). Compared to stem cells cultured in the absence of a LED, under polarized green and red LEDs, the stem cells exposed to a polarized blue LED significantly enhanced neuronal biomarkers such as neurofilament M (NFM) and neuron specific enolase (NSE) at both mRNA and protein levels...
May 2, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28398738/au10-sg-10-a-chiral-gold-catenane-nanocluster-with-zero-confined-electrons-optical-properties-and-first-principles-theoretical-analysis
#9
Franck Bertorelle, Isabelle Russier-Antoine, Nathalie Calin, Clothilde Comby-Zerbino, Amina Bensalah-Ledoux, Stephan Guy, Philippe Dugourd, Pierre-François Brevet, Željka Sanader, Marjan Krstić, Vlasta Bonačić-Koutecký, Rodolphe Antoine
We report facile synthesis of the Au10(SG)10 nanoclusters, where SG stands for glutathione, found to be promising as a new class of radiosensitizers for cancer radiotherapy. The homoleptic catenane structure with two Au5SG5 interconnected rings, among different isomer structures, gives the best agreement between theoretical and experimental optical spectra and XRD patterns. This catenane structure exhibits a centrosymmetry-broken structure, resulting in enhanced second harmonic response and new characteristic circular dichroism signals in the spectral region of 250-400 nm...
May 4, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28325784/the-prevention-of-gestational-diabetes-mellitus-with-antenatal-oral-inositol-supplementation-a-randomized-controlled-trial
#10
Maria Farren, Niamh Daly, Aoife McKeating, Brendan Kinsley, Michael J Turner, Sean Daly
OBJECTIVE: This study investigated if inositol in a combination of myo-inositol and D-chiro-inositol would prevent gestational diabetes mellitus (GDM) in women with a family history of diabetes. RESEARCH DESIGN AND METHODS: This was a randomized controlled trial that examined whether inositol from the first antenatal visit prevents GDM. The trial was carried out in a single-center tertiary referral center. Women with a family history of diabetes were enrolled at the first antenatal visit...
June 2017: Diabetes Care
https://www.readbyqxmd.com/read/28159246/low-concentration-of-sodium-bicarbonate-improves-the-bioactive-compound-levels-and-antioxidant-and-%C3%AE-glucosidase-inhibitory-activities-of-tartary-buckwheat-sprouts
#11
Peiyou Qin, Aichun Wei, Degang Zhao, Yang Yao, Xiushi Yang, Baoqing Dun, Guixing Ren
This study aimed to investigate the effects of different concentrations of sodium bicarbonate (NaHCO3) on the accumulation of flavonoids, total phenolics and d-chiro-inositol (DCI), as well as the antioxidant and α-glucosidase inhibitory activities, in tartary buckwheat sprouts. Treatment with low concentrations of NaHCO3 (0.05, 0.1, and 0.2%) resulted in an increase in flavonoids, total phenolic compounds and DCI concentrations, and improved DPPH radical-scavenging and α-glucosidase inhibition activities compared with the control (0%)...
June 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28087886/d-chiro-inositol-ameliorates-endothelial-dysfunction-via-inhibition-of-oxidative-stress-and-mitochondrial-fission
#12
Bobo Zhang, Xudan Guo, Yunlong Li, Qiang Peng, Jinfeng Gao, Baolin Liu, Min Wang
SCOPE: d-chiro inositol (DCI), an isomer of inositol, possesses anti-oxidative and endothelial protective properties. The mechanism by which DCI prevents endothelial dysfunction was investigated, with emphasis on oxidative stress. METHODS AND RESULTS: DCI was found to inhibit NOX4 induction and enhance Nrf2 activity in palmitate (PA)-stimulated cells, showing that DCI prevents oxidative stress. DCI suppressed Ser616 phosphorylation and increased Ser637 phosphorylation of Drp1 and inhibited PA-induced mitochondrial fission...
January 14, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28078725/chiral-amplification-by-self-assembly-of-neutral-luminescent-platinum-ii-complexes
#13
Alessandro Aliprandi, Christelle M Croisetu, Matteo Mauro, Luisa De Cola
Two novel enantiomerically pure chiral ligands and the corresponding neutral Pt(II) complexes have been synthetized and characterized. The self-assembly properties of the complexes have been investigated using different morphological and photophysical techniques. The two enantiomeric complexes, 4 a and 4 b, show high tendency to self-assemble into chiral supramolecular aggregates with right (P) and left-handed (M) helical configurations, respectively, as proven by SEM and absorption circular dichroism. The formation of such organized structures is driven by the formation of metallophilic and π-π interactions between spatially close Pt complexes with an enhancement of the chiro-optical properties in the solid state...
May 2, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28039583/a-pilot-study-of-d-chiro-inositol-plus-folic-acid-in-overweight-patients-with-type-1-diabetes
#14
RANDOMIZED CONTROLLED TRIAL
Anna Rita Maurizi, Marika Menduni, Rossella Del Toro, Shadi Kyanvash, Daria Maggi, Chiara Guglielmi, Angelo Lauria Pantano, Giuseppe Defeudis, Elvira Fioriti, Silvia Manfrini, Paolo Pozzilli
AIMS: To improve insulin sensitivity, insulin-sensitizing drugs such as metformin are commonly used in overweight and obese T1D patients. Similarly to metformin, D-chiro-inositol (DCI), as putative mediator of intracellular insulin action, can act as insulin sensitizer. The aim of this pilot study was to evaluate the hypothesis that DCI plus folic acid may improve glucose control reducing insulin resistance in overweight or obese T1D patients. METHODS: A 24-week randomized control trial was carried out in 26 overweight or obese T1D patients, undergoing intensive insulin therapy...
April 2017: Acta Diabetologica
https://www.readbyqxmd.com/read/27898267/combining-treatment-with-myo-inositol-and-d-chiro-inositol-40-1-is-effective-in-restoring-ovary-function-and-metabolic-balance-in-pcos-patients
#15
REVIEW
Giovanni Monastra, Vittorio Unfer, Abdel Halim Harrath, Mariano Bizzarri
Polycystic ovary syndrome (PCOS), a relevant cause of infertility, is a heterogeneous, endocrine disorder affecting up to 10-15% of women in reproductive age. Besides hyperandrogenism, insulin resistance (IR) plays a key role in such syndrome. Insulin-sensitizing drugs, such as Metformin, are effective in treating hyper-insulinemic PCOS patients. Recently, inositols - myo-inositol (MI) and D-chiro-inositol (DCI) - have shown to be an efficient and safe alternative in PCOS management, as both inositol isoforms are able to counteract downstream consequences of insulin resistance...
January 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/27882052/myoinositol-and-d-chiro-inositol-in-improving-insulin-resistance-in-obese-male-children-preliminary-data
#16
Mario Mancini, Alice Andreassi, Michela Salvioni, Fiore Pelliccione, Gianna Mantellassi, Giuseppe Banderali
Myoinositol and D-chiro inositol, which are inositol isomers, have been shown to possess insulin-mimetic properties and to improve insulin resistance, especially in women with polycystic ovary syndrome. However, it has not been determined if this relationship exists also in children. Based on these previous findings, we hypothesized that inositol could be effective in improving insulin sensitivity in children with insulin resistance. To evaluate this hypothesis, we administered both inositol formulations before carrying out an oral glucose tolerance test (OGTT) in a group of obese insulin-resistant male children with high basal insulin levels and compared the values obtained with an OGTT previously conducted without inositol, in the same group, with unchanged BMI...
2016: International Journal of Endocrinology
https://www.readbyqxmd.com/read/27866938/ovulation-induction-in-polycystic-ovary-syndrome-current-options
#17
REVIEW
Richard S Legro
There are a variety of effective treatment options to induce ovulation in women with polycystic ovary syndrome (PCOS). The most effective treatments are primarily reproductive and target the hypothalamic-pituitary-ovarian (HPO) axis. Letrozole, an aromatase inhibitor, is headed toward replacing clomiphene, a selective estrogen receptor modulator, as the first-choice option. Metabolic treatments likely work indirectly through the HPO axis. Many metabolic treatments have shown initial promise and later failed (troglitozone or d-chiro-inositol) or disappointed (metformin); further studies are needed of newer agents to treat type 2 diabetes...
November 2016: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/27843451/effects-of-inositol-s-in-women-with-pcos-a-systematic-review-of-randomized-controlled-trials
#18
REVIEW
Vittorio Unfer, John E Nestler, Zdravko A Kamenov, Nikos Prapas, Fabio Facchinetti
Polycystic ovary syndrome (PCOS) is a common endocrine disorder, with complex etiology and pathophysiology, which remains poorly understood. It affects about 5-10% of women of reproductive age who typically suffer from obesity, hyperandrogenism, ovarian dysfunction, and menstrual irregularity. Indeed, PCOS is the most common cause of anovulatory infertility in industrialized nations, and it is associated with insulin resistance, type 2 diabetes mellitus, and increased cardiovascular risk. Although insulin resistance is not included as a criterion for diagnosis, it is a critical pathological condition of PCOS...
2016: International Journal of Endocrinology
https://www.readbyqxmd.com/read/27807448/the-effectiveness-of-myo-inositol-and-d-chiro-inositol-treatment-in-type-2-diabetes
#19
Basilio Pintaudi, Giacoma Di Vieste, Matteo Bonomo
Inositol has been used as a supplement in treating several pathologies such as PCOS, metabolic syndrome, and gestational diabetes. Both myo-inositol and its isomer d-chiro-inositol showed insulin mimetic effects in conditions of insulin resistance. Type 2 diabetes (T2DM) is a condition typically caused by insulin resistance. There is a lack of evidence of inositol use in T2DM. We evaluated the effectiveness and safety of myo-inositol and d-chiro-inositol treatment in T2DM. This was a pilot study involving a consecutive sample of patients with T2DM with suboptimal glycemic control (HbA1c 7...
2016: International Journal of Endocrinology
https://www.readbyqxmd.com/read/27795706/inositol-treatment-and-art-outcomes-in-women-with-pcos
#20
REVIEW
Deepika Garg, Reshef Tal
Polycystic ovary syndrome (PCOS) affects 5-10% of women in reproductive age and is characterized by oligo/amenorrhea, androgen excess, insulin resistance, and typical polycystic ovarian morphology. It is the most common cause of infertility secondary to ovulatory dysfunction. The underlying etiology is still unknown but is believed to be multifactorial. Insulin-sensitizing compounds such as inositol, a B-complex vitamin, and its stereoisomers (myo-inositol and D-chiro-inositol) have been studied as an effective treatment of PCOS...
2016: International Journal of Endocrinology
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