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  1. AU="Chandrappa S"
  2. AU="Cole, Kevin"
  3. AU=De Ceukelaire Wim
  4. AU=Tomatis L
  5. AU=Chandra Sharad
  6. AU="Mishra, Malvika"
  7. AU="Bruggemann, Kira"
  8. AU="Miura, Tanya A."
  9. AU="Kobeasy, Mohamed I."
  10. AU="Sonthonnax, Florian" AU="Sonthonnax, Florian"
  11. AU="Wang, Rongzu"

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  1. Artikel ; Online: Kinetics and computational analysis of cholinesterase inhibition by REVERC3, a bisdemethoxycurcumin-rich extract

    Sudeep HV / Amritha Raj / Gouthamchandra K / Chandrappa S / Shyamprasad K

    SAGE Open Medicine, Vol

    Relevance to the treatment of Alzheimer’s disease

    2020  Band 8

    Abstract: Objectives: Cholinesterase inhibition is a common strategy to treat Alzheimer’s disease. In this study, we have investigated the cholinesterase inhibitory effects of a first-of-its-kind turmeric extract (REVERC3) having enriched content of ... ...

    Abstract Objectives: Cholinesterase inhibition is a common strategy to treat Alzheimer’s disease. In this study, we have investigated the cholinesterase inhibitory effects of a first-of-its-kind turmeric extract (REVERC3) having enriched content of bisdemethoxycurcumin as major active curcuminoid. Methods : The inhibition studies were performed using Ellman’s colorimetric assay. The kinetics of acetylcholinesterase and butyrylcholinesterase was determined in the presence of REVERC3 using the Lineweaver–Burk double reciprocal plots. Furthermore, we used AutoDock tools to predict the binding of bisdemethoxycurcumin with the active sites of cholinesterases. Results : REVERC3 showed 4.8- and 5.39-fold higher inhibitory potential of acetylcholinesterase and butyrylcholinesterase with IC50 values of 29.08 and 33.59 µg/mL, respectively, compared to the regular turmeric extract. The mode of binding of REVERC3 was competitive in the case of acetylcholinesterase while it was uncompetitive for the inhibition of butyrylcholinesterase. Docking analysis revealed that bisdemethoxycurcumin, the major constituent of REVERC3, has different preferences of binding in the active sites of acetylcholinesterase and butyrylcholinesterase. However, the best binding pose predictions are in line with the experimental binding mode of the cholinesterases. Conclusion : These results indicate that bisdemethoxycurcumin-enriched turmeric extract could improve the cholinergic functions via dual inhibition of cholinesterases. However, the predominant role of bisdemethoxycurcumin in REVERC3 must be further validated using preclinical studies and clinical trials.
    Schlagwörter Medicine (General) ; R5-920
    Thema/Rubrik (Code) 500
    Sprache Englisch
    Erscheinungsdatum 2020-11-01T00:00:00Z
    Verlag SAGE Publishing
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  2. Artikel ; Online: Unveiling Valence State-Dependent Photocatalytic Water Splitting Activity and Photocathodic Behavior in Visible Light-Active Iridium-Doped BaTiO

    Chandrappa, Sujana / Myakala, Stephen Nagaraju / Koshi, Namitha Anna / Galbao, Simon Joyson / Lee, Seung-Cheol / Bhattacharjee, Satadeep / Eder, Dominik / Cherevan, Alexey / Murthy, Dharmapura H K

    ACS applied materials & interfaces

    2024  Band 16, Heft 7, Seite(n) 8763–8771

    Abstract: Despite having favorable energetics and tunable optoelectronic properties, utilization of ... ...

    Abstract Despite having favorable energetics and tunable optoelectronic properties, utilization of BaTiO
    Sprache Englisch
    Erscheinungsdatum 2024-02-07
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.3c16710
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Targeting the sympathetic nervous system with the selective imidazoline receptor agonist moxonidine for the management of hypertension: an international position statement.

    Schlaich, Markus P / Tsioufis, Konstantinos / Taddei, Stefano / Ferri, Claudio / Cooper, Mark / Sindone, Andrew / Borghi, Claudio / Parissis, John / Marketou, Maria / Vintila, Ana Maria / Farcas, Anca / Kiuchi, Marcio G / Chandrappa, Shukrath

    Journal of hypertension

    2024  

    Abstract: Hypertension is often linked with metabolic risk factors that share common pathophysiological pathways. Despite wide-spread availability of multiple drug classes, optimal blood pressure (BP) control remains challenging. Increased central sympathetic ... ...

    Abstract Hypertension is often linked with metabolic risk factors that share common pathophysiological pathways. Despite wide-spread availability of multiple drug classes, optimal blood pressure (BP) control remains challenging. Increased central sympathetic outflow is frequently neglected as a critical regulator of both circulatory and metabolic pathways and often remains unopposed therapeutically. Selective imidazoline receptor agonists (SIRAs) effectively reduce BP with a favorable side effect profile compared with older centrally acting antihypertensive drugs. Hard outcome data in hypertension, such as prevention of stroke, heart and kidney diseases, are not available with SIRAs. However, in direct comparisons, SIRAs were as effective as angiotensin-converting enzyme inhibitors, β-blockers, calcium channel blockers, and diuretics in lowering BP. Other beneficial effects on metabolic parameters in hypertensive patients with concomitant overweight and obesity have been documented with SIRAs. Here we review the existing evidence on the safety and efficacy of moxonidine, a widely available SIRA, compared with common antihypertensive agents and provide a consensus position statement based on inputs from 12 experts from Europe and Australia on SIRAs in hypertension management.
    Sprache Englisch
    Erscheinungsdatum 2024-05-15
    Erscheinungsland Netherlands
    Dokumenttyp Journal Article
    ZDB-ID 605532-1
    ISSN 1473-5598 ; 0263-6352 ; 0952-1178
    ISSN (online) 1473-5598
    ISSN 0263-6352 ; 0952-1178
    DOI 10.1097/HJH.0000000000003769
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  4. Artikel: Efficacy of a Standardized Turmeric Extract Comprised of 70% Bisdemothoxy-Curcumin (REVERC3) Against LPS-Induced Inflammation in RAW264.7 Cells and Carrageenan-Induced Paw Edema.

    Gouthamchandra, Kuluvar / Sudeep, Heggar Venkataramana / Chandrappa, Siddappa / Raj, Amrith / Naveen, Puttaswamy / Shyamaprasad, Kodimule

    Journal of inflammation research

    2021  Band 14, Seite(n) 859–868

    Abstract: Objective: It is well known that regular turmeric extract with 95% curcuminoid is comprised of curcumin (70.07%), desmethoxycurcumin (20.28%), and bisdemethoxycurcumin (BDMC) (3.63%). In the current study for the first time, we have enriched about 3% of ...

    Abstract Objective: It is well known that regular turmeric extract with 95% curcuminoid is comprised of curcumin (70.07%), desmethoxycurcumin (20.28%), and bisdemethoxycurcumin (BDMC) (3.63%). In the current study for the first time, we have enriched about 3% of bisdemethoxycurcumin (BDMC) to 70% as well as named it as REVERC3 and compared anti-inflammatory activity with regular turmeric extract using in vitro and in vivo models of inflammation.
    Methods: To reveal the potential anti-inflammatory mechanism of action, we investigated nitric oxide (NO) scavenging, xanthine oxidase, and lipoxygenase inhibitory activity, further determined the level of pro-inflammatory cytokines, such as interleukin 6 (IL-6), tumor necrosis factor (TNF-α) and major inflammatory mediators like cyclooxygenase (COX-2) and inducible nitric oxide synthase (iNOS), inhibition in lipopolysaccharide (LPS) induced inflammation in RAW macrophage cells. In the other hand, a carrageenan-stimulated inflammatory rat model was carried out.
    Results: Our study findings exhibited a significant anti-inflammatory activity of REVERC3 together with nitric oxide (NO), xanthine oxidase, and lipoxygenase inhibition. Further, we attenuated the levels of cyclooxygenase (COX-2), inducible nitric oxide synthase (iNOS), interleukin (IL-6) and tumor necrosis factor (TNF-α) expressions in the LPS-elicited RAW macrophage cells. REVERC3 showed a potential anti-inflammatory activity by inhibiting carrageenan induced paw edema after 4 hr at the dose of 100mg/kg body weight.
    Conclusion: Thus, our findings collectively indicated that the REVERC3 could efficiently inhibit inflammation compared to regular turmeric extract. Since bisdemethoxycurcumin is a stable molecule it could be effectively used in the applications of health care and the nutraceutical industry, indeed which deserves further investigations.
    Sprache Englisch
    Erscheinungsdatum 2021-03-12
    Erscheinungsland New Zealand
    Dokumenttyp Journal Article
    ZDB-ID 2494878-0
    ISSN 1178-7031
    ISSN 1178-7031
    DOI 10.2147/JIR.S291293
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  5. Artikel ; Online: Circulating and endometrial cell oxidative stress in dairy cows diagnosed with metritis.

    Malledevarahalli Chandrappa, Sanjana / Pascottini, Osvaldo Bogado / Opsomer, Geert / Meineri, Giorgia / Martino, Nicola Antonio / Banchi, Penelope / Vincenti, Leila / Ricci, Alessandro

    Theriogenology

    2022  Band 198, Seite(n) 217–223

    Abstract: Dairy cows diagnosed with metritis may experience a greater degree of oxidative stress (OS) and a deficit in the antioxidative capacity compared to healthy cows. We aimed to assess circulating OS markers and endometrial cell mitochondrial function, ... ...

    Abstract Dairy cows diagnosed with metritis may experience a greater degree of oxidative stress (OS) and a deficit in the antioxidative capacity compared to healthy cows. We aimed to assess circulating OS markers and endometrial cell mitochondrial function, intracellular reactive oxygen species (ROS) production, and mean endometrial nuclear cell area in postpartum cows diagnosed with metritis or as healthy. From an initial pool of 121 Holstein cows, we retrospectively selected 34 cows and balanced for metritis (n = 17) or healthy (n = 17). Metritis was defined as an enlarged uterus with red-brown watery or thick off-white purulent discharge occurring within 21 days postpartum. Cows with no signs of clinical disease (including dystocia or retained placenta) were referred to as healthy. Blood samples for serum reactive oxygen metabolites (d-ROM), antioxidants (OXY), and oxidative status index (OSI) tests, evaluated via photometric determination of plasma thiols, were performed at 7, 14, 21, 28, and 35 days postpartum. Furthermore, from the initial pool, a random subset of 5 cows diagnosed with metritis and 6 diagnosed as healthy we collected (at the same time points as for the blood samples) endometrial cytology samples using the cytobrush technique. From the uterine samples, we evaluated the endometrial cell mitochondrial function, intracellular ROS levels, and the endometrial cell nuclear area using MitoTracker Orange, dichlorodihydrofluorescein diacetate, and Hoechst 33258, respectively. Mixed linear regression models, accounting for repeated measurements, were fitted to assess the effect of metritis versus healthy on circulating and endometrial cell OS parameters and endometrial cell size. The effect of days postpartum and its interaction with uterine health status were forced into each model. Serum concentrations of d-ROMs and OSI were greater in metritis at 7, 14, and 35 days postpartum than in healthy cows. Interestingly, the mean endometrial cell nuclear area was lower in metritis than healthy cows at 14 and 21 days postpartum. We found no differences between metritis and healthy for endometrial cell mitochondrial function and intracellular ROS production. In conclusion, cows diagnosed with metritis experienced greater systemic OS levels than healthy cows, but their OS was not higher in the uterine milieu.
    Mesh-Begriff(e) Pregnancy ; Female ; Cattle ; Animals ; Endometritis/veterinary ; Lactation ; Reactive Oxygen Species ; Retrospective Studies ; Cattle Diseases/diagnosis ; Postpartum Period ; Antioxidants/metabolism ; Oxidative Stress
    Chemische Substanzen Reactive Oxygen Species ; Antioxidants
    Sprache Englisch
    Erscheinungsdatum 2022-12-30
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 189232-0
    ISSN 1879-3231 ; 0093-691X
    ISSN (online) 1879-3231
    ISSN 0093-691X
    DOI 10.1016/j.theriogenology.2022.12.045
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  6. Artikel: Utilizing 2D materials to enhance H2 generation efficiency via photocatalytic reforming industrial and solid waste

    Chandrappa, Sujana / Murthy, Dharmapura H.K / Reddy, Nagappagari Lakshmana / Babu, S. Jagadeesh / Rangappa, Dinesh / Bhargav, Urupalli / Preethi, Vijayarengan / Mamatha Kumari, Murikinati / Shankar, Muthukonda Venkatakrishnan

    Environmental research. 2021 Sept., v. 200

    2021  

    Abstract: Sustainable valorization of industrial and solid wastes by utilizing them as feedstock to generate H₂ via the photocatalytic reforming (PR) process holds great promise. It can also be an effective method to treat solid waste that otherwise would require ... ...

    Abstract Sustainable valorization of industrial and solid wastes by utilizing them as feedstock to generate H₂ via the photocatalytic reforming (PR) process holds great promise. It can also be an effective method to treat solid waste that otherwise would require tedious and expensive processes. This approach has the potential to offer energy solutions and form value-added chemicals. In this direction, developing photocatalysts and tuning their properties play an essential role in advancing the H₂ generation efficiency. This Review article explores the application of 2D photocatalysts to generate H₂ via PR of industrial waste (H₂S) and solid waste, such as plastic and biomass. Despite having favorable optoelectronic properties, 2D photocatalysts are not widely employed for the PR process. The latest progress in employing 2D photocatalysts to realize efficient H₂ evolution from biomass, plastic, and industrial waste such as H₂S is detailed in this Review. A correlation between the properties of 2D photocatalysts with H₂ evolution rate is discussed. We also emphasize understanding the mechanism involved in the PR process and the importance of 2D photocatalysts design. Such rational insight aids in further enhancing the H₂ generation efficiency by effectively using solid/industrial waste as a feedstock.
    Schlagwörter biomass ; energy ; feedstocks ; industrial wastes ; photocatalysts ; plastics ; research ; solid wastes ; value added
    Sprache Englisch
    Erscheinungsverlauf 2021-09
    Erscheinungsort Elsevier Inc.
    Dokumenttyp Artikel
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2021.111239
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  7. Artikel: Overall Survival Prediction of Docetaxel-based Second-line Treatment for Advanced Non-small Cell Lung Cancer: A Systematic Review and Meta-analysis.

    Nagaraju, Chaitra / Vaidya, Gayatri / Jain, Anisha S / Nair, Amrutha Puthiyidath / Chandrappa, Sahana / Srinivasa, Chandrashekar / Suresh, Kuralayanapalya Puttahonnappa / Patil, Sharanagouda S / Shivananda, Bindya / Kollur, Shiva Prasad / Shivamallu, Chandan

    Oman medical journal

    2022  Band 37, Heft 5, Seite(n) e419

    Abstract: Objectives: Non-small cell lung cancer (NSCLC) accounts for 75-85% of all lung cancer diagnoses. This meta-analysis sought to estimate the overall survival (OS) of NSCLC based on randomized control trials which had compared docetaxel with kinase ... ...

    Abstract Objectives: Non-small cell lung cancer (NSCLC) accounts for 75-85% of all lung cancer diagnoses. This meta-analysis sought to estimate the overall survival (OS) of NSCLC based on randomized control trials which had compared docetaxel with kinase inhibitors, antineoplastic agents, and monoclonal antibodies as second-line chemotherapy for advanced NSCLC.
    Methods: We selected 18 randomized control trials which used docetaxel as the standard treatment arm, while kinase inhibitors, antineoplastic agents, and monoclonal antibodies constituted the experimental arm. The methodological quality of the trial was classified according to the Modified Jadad score. Several steps were taken to reduce publication bias. A forest plot was used to graphically summarize the meta-analysis.
    Results: The Hedge's g value of antineoplastic agents was 0.11 (95% CI: -0.03-0.26), while for kinase inhibitors was 0.04 (95% CI: -0.10-0.17) and monoclonal antibodies was 0.05 (95% CI: -0.02-0.13). Forest plot showed a clear though only slightly higher overall survival using docetaxel compared to those of the antineoplastic agents, kinase inhibitors, and monoclonal antibodies, due to the existence of moderate heterogeneity and lower impact.
    Conclusions: Overall, the patients in these studies who were in the standard (docetaxel) treatment arm had slightly better OS than those in the intervention treatment arm. As per the results, docetaxel was more effective in the second-line treatment of advanced NSCLC than antineoplastic agents, monoclonal antibodies, and kinase inhibitors. We infer that docetaxel-based second-line therapy for patients with advanced NSCLC is supported by our meta-analysis.
    Sprache Englisch
    Erscheinungsdatum 2022-09-30
    Erscheinungsland Oman
    Dokumenttyp Journal Article
    ZDB-ID 2571431-4
    ISSN 2070-5204 ; 1999-768X
    ISSN (online) 2070-5204
    ISSN 1999-768X
    DOI 10.5001/omj.2022.86
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  8. Buch ; Online: Iridium-doping as a strategy to realize visible light absorption and p-type behavior in BaTiO3

    Chandrappa, Sujana / Galbao, Simon Joyson / Krishnan, P S Sankara Rama / Koshi, Namitha Anna / Das, Srewashi / Myakala, Stephen Nagaraju / Lee, Seung Cheol / Dutta, Arnab / Cherevan, Alexey / Bhattacharjee, Satadeep / Murthy, Dharmapura H K

    2023  

    Abstract: BaTiO3 is typically a strong n-type material with tuneable optoelectronic properties via doping and controlling the synthesis conditions. It has a wide band gap that can only harness the ultraviolet region of the solar spectrum. Despite significant ... ...

    Abstract BaTiO3 is typically a strong n-type material with tuneable optoelectronic properties via doping and controlling the synthesis conditions. It has a wide band gap that can only harness the ultraviolet region of the solar spectrum. Despite significant progress, achieving visible-light absorbing BTO with tuneable carrier concentration has been challenging, a crucial requirement for many applications. In this work, a p-type BTO with visible-light absorption is realized via iridium doping. Detailed analysis using advanced spectroscopy tools and computational electronic structure analysis is used to rationalize the n- to p-type transition after Ir doping. Results offered mechanistic insight into the interplay between the dopant site occupancy, the dopant position within the band gap, and the defect chemistry affecting the carrier concentration. A decrease in the Ti3+ donor levels concentration and the mutually correlated oxygen vacancies upon Ir doping is attributed to the p-type behavior. Due to the formation of Ir3+ or Ir4+ in-gap energy levels within the forbidden region, the optical transition can be elicited from or to such levels resulting in visible-light absorption. This newly developed Ir-doped BTO can be a promising p-type perovskite-oxide with imminent applications in solar fuel generation, spintronics and optoelectronics.

    Comment: 21 pages, 8 figures
    Schlagwörter Condensed Matter - Materials Science ; Physics - Chemical Physics
    Erscheinungsdatum 2023-02-15
    Erscheinungsland us
    Dokumenttyp Buch ; Online
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  9. Artikel: One-pot synthesis of aryl oxime analogues from methyl arenes using NBS and hydroxyl amine hydrochloride

    Chandrappa, S / Umashankara, M / Vinaya, K / Ananda Kumar, C.S / Rangappa, K.S

    Tetrahedron letters. 2012 May 23, v. 53, no. 21

    2012  

    Abstract: The one-pot synthesis of aryl oximes is reported by the reaction of methyl arenes with NBS using hydroxyl amine hydrochloride. The direct conversion of methyl group into oxime group has been achieved under mild reaction conditions in the presence of ... ...

    Abstract The one-pot synthesis of aryl oximes is reported by the reaction of methyl arenes with NBS using hydroxyl amine hydrochloride. The direct conversion of methyl group into oxime group has been achieved under mild reaction conditions in the presence of sensitive functional groups including chloro, bromo, cyano, hydroxy, fluoro, dioxaborolane, esters, and trifluoro methyl substituents with excellent yields. The simple experimental procedure and easy purification make this protocol advantageous.
    Schlagwörter aromatic hydrocarbons ; chemical reactions ; chemical structure ; esters ; oximes
    Sprache Englisch
    Erscheinungsverlauf 2012-0523
    Umfang p. 2632-2635.
    Erscheinungsort Elsevier Ltd
    Dokumenttyp Artikel
    ZDB-ID 204287-3
    ISSN 1873-3581 ; 0040-4039
    ISSN (online) 1873-3581
    ISSN 0040-4039
    DOI 10.1016/j.tetlet.2012.03.052
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  10. Artikel ; Online: Utilizing 2D materials to enhance H

    Chandrappa, Sujana / Murthy, Dharmapura H K / Reddy, Nagappagari Lakshmana / Babu, S Jagadeesh / Rangappa, Dinesh / Bhargav, Urupalli / Preethi, Vijayarengan / Mamatha Kumari, Murikinati / Shankar, Muthukonda Venkatakrishnan

    Environmental research

    2021  Band 200, Seite(n) 111239

    Abstract: Sustainable valorization of industrial and solid wastes by utilizing them as feedstock to generate ... ...

    Abstract Sustainable valorization of industrial and solid wastes by utilizing them as feedstock to generate H
    Mesh-Begriff(e) Biomass ; Industrial Waste ; Solid Waste
    Chemische Substanzen Industrial Waste ; Solid Waste
    Sprache Englisch
    Erscheinungsdatum 2021-05-14
    Erscheinungsland Netherlands
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2021.111239
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