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Ijinu TP, De Lellis LF, Shanmugarama S, Pérez-Gregorio R, Sasikumar P, Ullah H, Buccato DG, Di Minno A, Baldi A, Daglia M. Anthocyanins as Immunomodulatory Dietary Supplements: A Nutraceutical Perspective and Micro-/Nano-Strategies for Enhanced Bioavailability. Nutrients 2023; 15:4152. [PMID: 37836436 PMCID: PMC10574533 DOI: 10.3390/nu15194152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 09/21/2023] [Accepted: 09/24/2023] [Indexed: 10/15/2023] Open
Abstract
Anthocyanins (ACNs) have attracted considerable attention for their potential to modulate the immune system. Research has revealed their antioxidant and anti-inflammatory properties, which play a crucial role in immune regulation by influencing key immune cells, such as lymphocytes, macrophages, and dendritic cells. Moreover, ACNs contribute towards maintaining a balance between proinflammatory and anti-inflammatory cytokines, thus promoting immune health. Beyond their direct effects on immune cells, ACNs significantly impact gut health and the microbiota, essential factors in immune regulation. Emerging evidence suggests that they positively influence the composition of the gut microbiome, enhancing their immunomodulatory effects. Furthermore, these compounds synergize with other bioactive substances, such as vitamins and minerals, further enhancing their potential as immune-supporting dietary supplements. However, detailed clinical studies must fully validate these findings and determine safe dosages across varied populations. Incorporating these natural compounds into functional foods or supplements could revolutionize the management of immune-related conditions. Personalized nutrition and healthcare strategies may be developed to enhance overall well-being and immune resilience by fully understanding the mechanisms underlying the actions of their components. Recent advancements in delivery methods have focused on improving the bioavailability and effectiveness of ACNs, providing promising avenues for future applications.
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Affiliation(s)
- Thadiyan Parambil Ijinu
- Naturæ Scientific, Kerala University-Business Innovation and Incubation Centre, Kariavattom Campus, University of Kerala, Thiruvananthapuram 695581, India;
- The National Society of Ethnopharmacology, VRA-179, Mannamoola, Peroorkada P.O., Thiruvananthapuram 695005, India
| | - Lorenza Francesca De Lellis
- Department of Pharmacy, University of Napoli Federico II, Via D. Montesano 49, 80131 Naples, Italy; (L.F.D.L.); (D.G.B.); (A.D.M.); (A.B.)
| | - Santny Shanmugarama
- Department of Pathology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA;
| | - Rosa Pérez-Gregorio
- Food and Health Omics Group, Institute of Agroecology and Food, Faculty of Sciences, University of Vigo, 32004 Ourense, Spain;
- LAQV-REQUIMTE, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
- Department of Analytical and Food Chemistry, Galicia Sur Health Research Institute (IISGS), SERGAS-UVIGO, 32002 Ourense, Spain
| | | | - Hammad Ullah
- Department of Pharmacy, University of Napoli Federico II, Via D. Montesano 49, 80131 Naples, Italy; (L.F.D.L.); (D.G.B.); (A.D.M.); (A.B.)
| | - Daniele Giuseppe Buccato
- Department of Pharmacy, University of Napoli Federico II, Via D. Montesano 49, 80131 Naples, Italy; (L.F.D.L.); (D.G.B.); (A.D.M.); (A.B.)
| | - Alessandro Di Minno
- Department of Pharmacy, University of Napoli Federico II, Via D. Montesano 49, 80131 Naples, Italy; (L.F.D.L.); (D.G.B.); (A.D.M.); (A.B.)
- CEINGE-Biotecnologie Avanzate, Via Gaetano Salvatore 486, 80145 Naples, Italy
| | - Alessandra Baldi
- Department of Pharmacy, University of Napoli Federico II, Via D. Montesano 49, 80131 Naples, Italy; (L.F.D.L.); (D.G.B.); (A.D.M.); (A.B.)
| | - Maria Daglia
- Department of Pharmacy, University of Napoli Federico II, Via D. Montesano 49, 80131 Naples, Italy; (L.F.D.L.); (D.G.B.); (A.D.M.); (A.B.)
- International Research Center for Food Nutrition and Safety, Jiangsu University, Zhenjiang 212013, China
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Puviarasu M, Asokan P, Sherif SU, Mathiyazhagan K, Sasikumar P. A STEEP based hybrid multi-criteria decision making model for the evaluation of battery recycling plant location. JAMR 2023. [DOI: 10.1108/jamr-06-2022-0124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
PurposeIncreased demand for new batteries and strict government protocols have stressed the battery industries to collect and recycle used batteries for economic and environmental benefits. This scenario has forced the battery industries to collect used batteries and establish the formal battery recycling plant (BRP) for effective recycling. The starting of BRP includes several strategic decisions, one of the most critical decisions encountered is to find the best sustainable location for BRP. Hence, this paper aims to address the complexity of the issues faced during the BRP location selection through a hybrid framework.Design/methodology/approachIn this study, the criteria are identified under socio-cultural, technical, environmental, economic and policy and legal (STEEP) dimensions through literature review and experts' opinions. Then, the hybrid methodology integrating fuzzy decision making trial and evaluation laboratory (DEMATEL), best worst method (BWM) and technique for order preference by similarity to an ideal solution (TOPSIS) has been proposed to find the inter-relationship between criteria, the weights of criteria and the best alternative.FindingsThe identified five main criteria and 26 sub-criteria have been analyzed through fuzzy DEMATEL, and found that the policy and legal criteria have more inter-relationship with other criteria. Then from BWM results, it is found that the support from government bodies has attained the maximum weightage. Finally, the second alternative has been identified as a more suitable location for establishing BRP using TOPSIS. Further, it is found from the results that the support from government bodies, the impact of emissions, availability of basic facilities and community health are the essential criteria under STEEP dimensions for establishing BRP.Originality/valueIn addition to the various existing sustainable criteria, this study has also considered a set of policy and legal criteria for the evaluation of locations for BRP. Further, the hybrid MCDM method has been proposed in this study for selecting the best alternative. Thus, this study has yielded more insights to the decision-makers in choosing a sustainable location for BRP.
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Periyasamy P, Mohammed MKA, Sasikumar P. Impact of Physio-Chemical Properties of Ketones With 2-Methoxyethanol and 2-Butoxyethanol at 303 K. Chemistry Africa 2022. [DOI: 10.1007/s42250-022-00576-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Venkatesan G, Kushwaha A, Kumar A, Bora DP, Sasikumar P. An improved visual closed tube Loop mediated isothermal amplification (LAMP) assay for rapid identification of orf virus in sheep and goats. Vet Ital 2022; 58. [PMID: 36586114 DOI: 10.12834/vetit.2426.15340.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Accepted: 07/05/2021] [Indexed: 01/01/2023]
Abstract
The orf virus (ORFV) is an epitheliotropic virus causing a highly contagious skin disease mainly in sheep and goats. Several diagnostics including molecular tools like Loop mediated isothermal amplification (LAMP) assay are available to detect ORFV in affected species. However, the carry-over contamination associated with LAMP as open tube format prevents the assay applicability as point of care test in field diagnostic settings. In this study, the B2L gene based LAMP assay was optimized in a closed tube format using hydroxynaphthol blue (HNB) and calcein as pre-addition dyes and it has shown a clear positive and negative signal at 60 °C using 4 and 5 mM concentrations of MgSO4 respectively for these dyes. Optimitimzed assay that could reveal the result within one hour is highly specific and senstive with a limit of detection at 12.5 femtogram of viral genomic DNA or ~85 virus genome equivalent. This improved method prevented the cross-contamination of future LAMP reactions in the laboratory without compromising diagnostic sensitivity (100%) and specificity (100%) when compared to open tube system. This closed tube LAMP method has potential to act as a simple visual detection assay for the rapid and specific diagnosis of ORFV in sheep and goats.
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Affiliation(s)
| | - Anand Kushwaha
- Division of Virology, ICAR-IVRI, Mukteswar 263 138, Nainital, Uttarakhand, India.
| | - Amit Kumar
- ivision of Virology, ICAR-IVRI, Mukteswar 263 138, Nainital, Uttarakhand, India.
| | - D P Bora
- Department of Microbiology, College of Veterinary Science, AAU, Khanapara, Guwahati, Assam-781022, India.
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Jithin A J A, Panigrahi SK, Sasikumar P, Rao KS, Krishnakumar G. Ablative properties, thermal stability, and compressive behaviour of hybrid silica phenolic ablative composites. Polym Degrad Stab 2022. [DOI: 10.1016/j.polymdegradstab.2022.110063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Musthafa Poyil M, Karuppiah P, Raja SSS, Sasikumar P. Isolation, Extraction, and Characterization of Verotoxin-producing Escherichia coli O157:H7 from Diarrheal Stool Samples. Sudan JMS 2022. [DOI: 10.18502/sjms.v17i1.10689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Background: Escherichia coli O157:H7 infection causes hemorrhagic colitis and is diagnosed based on symptoms such as cramps, stomach pain, and watery diarrhea. Shiga-like toxins (Verotoxin) produced by Escherichia coli O157:H7 damages endothelial cells of both kidney and brain, causing renal dysfunction and neurological problems.
Methods: The present study focuses on identifying the prevalence of Verotoxin-producing Escherichia coli O157:H7 among diarrheal inpatients at Erode Government Hospital, India, and its antibiogram. Further, the Verotoxins were characterized by using SDS-PAGE analysis. A total of 123 samples were collected both from diarrheal stools, and strains from 37 samples (43.02 %) were found to have the presence of E. coli. The organisms were identified based on their colony morphology on various media, cell morphology, and biochemical tests. The Shiga-like toxin production was identified by non-fermentation of sorbitol on SMAC agar plates. Confirmation of Shiga-like toxin was performed using agglutination assay.
Results: In total, 12 isolates showed agglutination and these isolates were confirmed to be E. coli O157:H7. The molecular weight of the Verotoxin was found to be between 20 and 29 kD. The antibiogram profile of the four isolated strains against 10 standard antibiotics was determined.
Conclusion: The results of this study show the occurrence of drug resistance on hemorrhagic colitis causing E. coli O157:H7.
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Sasikumar P, Nagaraj G, Thiyagarajan R, K. A. Mohammed M, Palaniappan L. Impact of physio-thermo properties on the azeotrope formation in benzene – 1-alkanol blends. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Aswathy M, Banik K, Parama D, Sasikumar P, Harsha C, Joseph AG, Sherin DR, Thanathu MK, Kunnumakkara AB, Vasu RK. Exploring the Cytotoxic Effects of the Extracts and Bioactive Triterpenoids from Dillenia indica against Oral Squamous Cell Carcinoma: A Scientific Interpretation and Validation of Indigenous Knowledge. ACS Pharmacol Transl Sci 2021; 4:834-847. [PMID: 33860206 DOI: 10.1021/acsptsci.1c00011] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Indexed: 02/08/2023]
Abstract
Triterpenoids are ubiquitously distributed secondary metabolites, primarily scrutinized as a source of medication and preventive measures for various chronic diseases. The ease of isolation and excellent pharmacological properties of triterpenoids are notable reasons behind the exponential rise of extensive research on the bioactive triterpenoids over the past few decades. Herein, we attempted to explore the anticancer potential of the fruit extract of the ethnomedicinal plant Dillenia indica against oral squamous cell carcinoma (OSCC) and have exclusively attributed the efficacy of the extracts to the presence of two triterpenoids, namely, betulinic acid (BA) and koetjapic acid (KA). Preliminary in vitro screening of both BA and KA unveiled that the entities could impart cytotoxicity and induce apoptosis in OSCC cell lines, which were further well-supported by virtual screening based on ligand binding affinity and molecular dynamic simulations. Additionally, the aforementioned metabolites could significantly modulate the critical players such as Akt/mTOR, NF-κB, and JAK/STAT3 signaling pathways involved in the regulation of important hallmarks of cancer like cell survival, proliferation, invasion, angiogenesis, and metastasis. The present findings provide insight and immense scientific support and integrity to a piece of indigenous knowledge. However, in vivo validation is a requisite for moving to clinical trials and developing it as a commercial drug.
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Affiliation(s)
- Maniyamma Aswathy
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Kishore Banik
- Cancer Biology Laboratory and DBT-AIST International Center for Translational & Environmental Research (DAICENTER), Department of Biosciences and Bioengineering, Indian Institute of Technology, Guwahati 781 039, Assam, India
| | - Dey Parama
- Cancer Biology Laboratory and DBT-AIST International Center for Translational & Environmental Research (DAICENTER), Department of Biosciences and Bioengineering, Indian Institute of Technology, Guwahati 781 039, Assam, India
| | - Parameswaran Sasikumar
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India
| | - Choudhary Harsha
- Cancer Biology Laboratory and DBT-AIST International Center for Translational & Environmental Research (DAICENTER), Department of Biosciences and Bioengineering, Indian Institute of Technology, Guwahati 781 039, Assam, India
| | - Anuja Gracy Joseph
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Daisy R Sherin
- Centre for Computational Modeling and Data Engineering, Indian Institute of Information Technology and Management-Kerala (IIITM-K), Thiruvananthapuram 695581, India
| | - Manojkumar K Thanathu
- Centre for Computational Modeling and Data Engineering, Indian Institute of Information Technology and Management-Kerala (IIITM-K), Thiruvananthapuram 695581, India
| | - Ajaikumar B Kunnumakkara
- Cancer Biology Laboratory and DBT-AIST International Center for Translational & Environmental Research (DAICENTER), Department of Biosciences and Bioengineering, Indian Institute of Technology, Guwahati 781 039, Assam, India
| | - Radhakrishnan Kokkuvayil Vasu
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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P. R, P. R. N, Omanakuttan VK, Babu SA, Sasikumar P, Praveen VK, Hopf H, John J. Superbase-Mediated Indirect Friedländer Reaction: A Transition Metal-Free Oxidative Annulation toward Functionalized Quinolines. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000365] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Rahul P.
- Chemical Sciences and Technology Division; CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); 695019 Thiruvananthapuram India
- Academy of Scientific and Innovative Research (AcSIR); 201002 Ghaziabad India
| | - Nitha P. R.
- Chemical Sciences and Technology Division; CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); 695019 Thiruvananthapuram India
- Academy of Scientific and Innovative Research (AcSIR); 201002 Ghaziabad India
| | - Vishnu K. Omanakuttan
- Chemical Sciences and Technology Division; CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); 695019 Thiruvananthapuram India
- Academy of Scientific and Innovative Research (AcSIR); 201002 Ghaziabad India
| | - Sheba Ann Babu
- Chemical Sciences and Technology Division; CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); 695019 Thiruvananthapuram India
- Academy of Scientific and Innovative Research (AcSIR); 201002 Ghaziabad India
| | - P. Sasikumar
- Chemical Sciences and Technology Division; CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); 695019 Thiruvananthapuram India
| | - Vakayil K. Praveen
- Chemical Sciences and Technology Division; CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); 695019 Thiruvananthapuram India
- Academy of Scientific and Innovative Research (AcSIR); 201002 Ghaziabad India
| | - Henning Hopf
- Institut für Organische Chemie; Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Jubi John
- Chemical Sciences and Technology Division; CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST); 695019 Thiruvananthapuram India
- Academy of Scientific and Innovative Research (AcSIR); 201002 Ghaziabad India
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Sharathna P, Meenu MT, Radhakrishnan KV, Dhanya BP, Gopalan G, Sasikumar P, Krishnan RS. Accessing Polycyclic Terpenoids from Zerumbone via Lewis Acid Catalyzed Synthetic Strategies. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0039-1690840] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
We herein disclose an effective strategy for the synthesis of [5.3.0] and [6.3.0] fused polycyclic terpenoids, which are important structural elements of natural products and biologically active compounds. The method comprises of Lewis acid catalyzed interrupted Nazarov cyclization of zerumbone derivatives such as zerumbone epoxide, triazole-appended zerumbone, zerumbal, and zerumbenone with a wide substrate scope with different indoles. Zerumbone epoxide furnished [5.3.0] and [6.3.0] fused structurally diverse sesquiterpenoids and all other zerumbone derivatives furnished the [6.3.0] fused motifs.
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Affiliation(s)
- Puthiyaparambath Sharathna
- Organic Chemistry Section, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST)
- Academy of Scientific and Innovative Research (AcSIR)
| | - Murugan Thulasi Meenu
- Organic Chemistry Section, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST)
- Academy of Scientific and Innovative Research (AcSIR)
| | - Kokkuvayil Vasu Radhakrishnan
- Organic Chemistry Section, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST)
- Academy of Scientific and Innovative Research (AcSIR)
| | - Bhandara Purayil Dhanya
- Organic Chemistry Section, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST)
| | - Greeshma Gopalan
- Organic Chemistry Section, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST)
| | - Parameswaran Sasikumar
- Organic Chemistry Section, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST)
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Prabha B, Sini S, Priyadarshini TS, Sasikumar P, Gopalan G, Joseph JP, Jithin MM, Sivan VV, Jayamurthy P, Radhakrishnan KV. Anti-inflammatory effect and mechanism of action of ellagic acid-3,3′,4-trimethoxy-4′-O-α-L-rhamnopyranoside isolated from Hopea parviflora in lipopolysaccharide-stimulated RAW 264.7 macrophages. Nat Prod Res 2019; 35:3156-3160. [DOI: 10.1080/14786419.2019.1690486] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- B. Prabha
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, India
| | - S. Sini
- Agroprocessing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, India
| | - T. S. Priyadarshini
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, India
| | - P. Sasikumar
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, India
| | - Greeshma Gopalan
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, India
| | - Jayesh P. Joseph
- M. S. Swaminathan Research Foundation-Community Agrobiodiversity Centre (MSSRF- CAbC), Puthurvayal, India
| | - M. M. Jithin
- M. S. Swaminathan Research Foundation-Community Agrobiodiversity Centre (MSSRF- CAbC), Puthurvayal, India
| | - V. V. Sivan
- M. S. Swaminathan Research Foundation-Community Agrobiodiversity Centre (MSSRF- CAbC), Puthurvayal, India
| | - P. Jayamurthy
- Agroprocessing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, India
- Academy of Scientific and Innovative Research (AcSIR), Thiruvananthapuram, India
| | - K. V. Radhakrishnan
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, India
- Academy of Scientific and Innovative Research (AcSIR), Thiruvananthapuram, India
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Mondal K, Halder P, Gopalan G, Sasikumar P, Radhakrishnan KV, Das P. Chloroform as a CO surrogate: applications and recent developments. Org Biomol Chem 2019; 17:5212-5222. [PMID: 31080990 DOI: 10.1039/c9ob00886a] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The carbonyl moiety is one of the indispensable sub-units in organic synthesis with significant applications in medicinal as well as materials chemistry. Hence the insertion of a carbonyl group via simple and highly efficient routes has been one of the most challenging tasks for organic chemists. Though the direct utilisation of CO gas in carbonylation is the fundamental procedure for the construction of carbonyl compounds, it has certain drawbacks due to its toxic and explosive nature. As a result, the need for cheap and efficient CO surrogates has gained much attention nowadays by which CO gas can be easily generated in situ or ex situ. In this review we discuss the advantages of chloroform as CO surrogate and have surveyed recent carbonylation reactions where chloroform has been used as CO source.
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Affiliation(s)
- Krishanu Mondal
- Department of Applied Chemistry, IIT(ISM) Dhanbad, Dhanbad 826004, India.
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Sasikumar P, Lekshmy K, Sini S, Prabha B, Kumar NA, Sivan VV, Jithin MM, Jayamurthy P, Shibi IG, Radhakrishnan KV. Isolation and characterization of resveratrol oligomers from the stem bark of Hopea ponga (Dennst.) Mabb. And their antidiabetic effect by modulation of digestive enzymes, protein glycation and glucose uptake in L6 myocytes. J Ethnopharmacol 2019; 236:196-204. [PMID: 30844488 DOI: 10.1016/j.jep.2019.01.046] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 11/24/2018] [Accepted: 01/22/2019] [Indexed: 06/09/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Hopea ponga (Dennst.) Mabb. Is used in traditional herbal formulations for diabetes complications. The aim of this study is to evaluate the antidiabetic effect of extracts and compounds from H. ponga. MATERIALS AND METHODS Silica gel column chromatography was performed to identify various chemical components of the plant extract. Different extracts of H. ponga and isolated compounds were screened for their antidiabetic effect by modulation of digestive enzymes and protein glycation. The effect of glucose uptake by the compounds and the pathways through which the compounds mediate the glucose uptake potential were confirmed by fluorescent microscopy, flow cytometry and western blot analysis. RESULTS Acetone and ethanol extracts of the stem bark of Hopea ponga (Dennst.) Mabb. Afforded six resveratrol oligomers namely, E-resveratrol (1), (-)-ε-viniferin (2), (-)-α-viniferin (3), trihydroxyphenanthrene glucoside (THPG) (4), vaticaphenol A (5), (-)-hopeaphenol (6), along with four phytosterols. The structures were determined on the basis of spectroscopic analyses including nuclear magnetic resonance (NMR) spectroscopy and high resolution mass spectrometry (HRMS) data. Compounds 1-5 and 7-10 were tested for their α-glucosidase, α-amylase and glycation inhibitiory activities. All the resveratrol oligomers (1-5) showed prominent α-glucosidase inhibition with IC50 values, 12.56 ± 1.00, 23.98 ± 1.11, 7.17 ± 1.10, 31.74 ± 0.42 and 16.95 ± 0.39 μM, respectively. Molecular docking studies also supported the observed α-glucosidase inhibition. Compound 3 displayed IC50 values of 4.85 ± 0.06 and 27.10 ± 0.04 μM in α-amylase and glycation inhibitory assays activity. The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay revealed that the compounds 3 and 4 were found to be less toxic at a concentration of 100 μM (<10%) and 25 μM (<20%), respectively. The effect of glucose uptake performed by 2-(N-(7-Nitrobenz-2-oxa-1,3-diazol-4-yl)amino)-2-deoxyglucose (2-NBDG) in L6 myoblast were measured by fluorescent microscopy and flow cytometry. The compounds 3 and 4 showed 2-NBDG uptake of 49.6% and 38.8% respectively. By examining the molecular pathway through which the compounds elicit their glucose uptake potential, it was observed that both the compounds mainly act via AMPK pathway. CONCLUSION This is the first report on the isolation of compounds from H. ponga. Altogether, the results of this study reveal the antidiabetic effects of H. ponga extracts and isolated compounds promoting traditional use of this plant in the treatment of diabetes.
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Affiliation(s)
- P Sasikumar
- Chemical Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, India
| | - K Lekshmy
- Agroprocessing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, India
| | - S Sini
- Agroprocessing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, India
| | - B Prabha
- Chemical Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, India
| | - N Anil Kumar
- M. S. Swaminathan Research Foundation-Community Agrobiodiversity Centre (MSSRF-CAbC), Puthurvayal, Wayanad, Kerala, India
| | - V V Sivan
- M. S. Swaminathan Research Foundation-Community Agrobiodiversity Centre (MSSRF-CAbC), Puthurvayal, Wayanad, Kerala, India
| | - M M Jithin
- M. S. Swaminathan Research Foundation-Community Agrobiodiversity Centre (MSSRF-CAbC), Puthurvayal, Wayanad, Kerala, India
| | - P Jayamurthy
- Agroprocessing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, India; Academy of Scientific and Innovative Research (AcSIR), Thiruvananthapuram, 695019, India
| | - I G Shibi
- Department of Chemistry, Sree Narayana College, Chempazhanthy, Thiruvananthapuram, Kerala, India
| | - K V Radhakrishnan
- Chemical Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, India; Academy of Scientific and Innovative Research (AcSIR), Thiruvananthapuram, 695019, India.
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Sasikumar P, AlOuda KS, Kaiser WJ, Holbrook LM, Kriek N, Unsworth AJ, Bye AP, Sage T, Ushioda R, Nagata K, Farndale RW, Gibbins JM. The chaperone protein HSP47: a platelet collagen binding protein that contributes to thrombosis and hemostasis. J Thromb Haemost 2018; 16:946-959. [PMID: 29512284 PMCID: PMC6434988 DOI: 10.1111/jth.13998] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Indexed: 11/30/2022]
Abstract
Essentials Heat shock protein 47 (HSP47), a collagen specific chaperone is present on the platelet surface. Collagen mediated platelet function was reduced following blockade or deletion of HSP47. GPVI receptor regulated signalling was reduced in HSP47 deficient platelets. Platelet HSP47 tethers to exposed collagen thus modulating thrombosis and hemostasis. SUMMARY Objective Heat shock protein 47 (HSP47) is an intracellular chaperone protein that is vital for collagen biosynthesis in collagen secreting cells. This protein has also been shown to be present on the surface of platelets. Given the importance of collagen and its interactions with platelets in triggering hemostasis and thrombosis, in this study we sought to characterize the role of HSP47 in these cells. Methods and Results The deletion of HSP47 in mouse platelets or its inhibition in human platelets reduced their function in response to collagen and the GPVI agonist (CRP-XL), but responses to thrombin were unaltered. In the absence of functional HSP47, the interaction of collagen with platelets was reduced, and this was associated with reduced GPVI-collagen binding, signalling and platelet activation. Thrombus formation on collagen, under arterial flow conditions, was also decreased following the inhibition or deletion of HSP47, in the presence or absence of eptifibatide, consistent with a role for HSP47 in enhancing platelet adhesion to collagen. Platelet adhesion under flow to von Willebrand factor was unaltered following HSP47 inhibition. Laser-induced thrombosis in cremaster muscle arterioles was reduced and bleeding time was prolonged in HSP47-deficient mice or following inhibition of HSP47. Conclusions Our study demonstrates the presence of HSP47 on the platelet surface, where it interacts with collagen, stabilizes platelet adhesion and increases collagen-mediated signalling and therefore thrombus formation and hemostasis.
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Affiliation(s)
- P. Sasikumar
- Institute for Cardiovascular and Metabolic ResearchSchool of Biological SciencesUniversity of ReadingReadingUK
| | - K. S. AlOuda
- Institute for Cardiovascular and Metabolic ResearchSchool of Biological SciencesUniversity of ReadingReadingUK
| | - W. J. Kaiser
- Institute for Cardiovascular and Metabolic ResearchSchool of Biological SciencesUniversity of ReadingReadingUK
| | - L. M. Holbrook
- Institute for Cardiovascular and Metabolic ResearchSchool of Biological SciencesUniversity of ReadingReadingUK
| | - N. Kriek
- Institute for Cardiovascular and Metabolic ResearchSchool of Biological SciencesUniversity of ReadingReadingUK
| | - A. J. Unsworth
- Institute for Cardiovascular and Metabolic ResearchSchool of Biological SciencesUniversity of ReadingReadingUK
| | - A. P. Bye
- Institute for Cardiovascular and Metabolic ResearchSchool of Biological SciencesUniversity of ReadingReadingUK
| | - T. Sage
- Institute for Cardiovascular and Metabolic ResearchSchool of Biological SciencesUniversity of ReadingReadingUK
| | - R. Ushioda
- Laboratory of Molecular and Cellular BiologyFaculty of Life SciencesKyoto Sangyo UniversityKyotoJapan
| | - K. Nagata
- Laboratory of Molecular and Cellular BiologyFaculty of Life SciencesKyoto Sangyo UniversityKyotoJapan
| | - R. W. Farndale
- Department of BiochemistryUniversity of CambridgeCambridgeUK
| | - J. M. Gibbins
- Institute for Cardiovascular and Metabolic ResearchSchool of Biological SciencesUniversity of ReadingReadingUK
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Holbrook L, Sandhar GK, Sasikumar P, Schenk MP, Stainer AR, Sahli KA, Flora GD, Bicknell AB, Gibbins JM. A humanized monoclonal antibody that inhibits platelet-surface ERp72 reveals a role for ERp72 in thrombosis. J Thromb Haemost 2018; 16:367-377. [PMID: 29052936 PMCID: PMC5838528 DOI: 10.1111/jth.13878] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Indexed: 11/26/2022]
Abstract
Essentials ERp72 is a thiol isomerase enzyme. ERp72 levels increase at the platelet surface during platelet activation. We generated a humanized monoclonal antibody which blocks ERp72 enzyme activity (anti-ERp72). Anti-ERp72 inhibits platelet functional responses and thrombosis. SUMMARY Background Within the endoplasmic reticulum, thiol isomerase enzymes modulate the formation and rearrangement of disulfide bonds in newly folded proteins entering the secretory pathway to ensure correct protein folding. In addition to their intracellular importance, thiol isomerases have been recently identified to be present on the surface of a number of cell types where they are important for cell function. Several thiol isomerases are known to be present on the resting platelet surface, including PDI, ERp5 and ERp57, and levels are increased following platelet activation. Inhibition of the catalytic activity of these enzymes results in diminished platelet function and thrombosis. Aim We previously determined that ERp72 is present at the resting platelet surface and levels increase upon platelet activation; however, its functional role on the cell surface was unclear. We aimed to investigate the role of ERp72 in platelet function and its role in thrombosis. Methods Using HuCAL technology, fully humanized Fc-null anti-ERp72 antibodies were generated. Eleven antibodies were screened for their ability to inhibit ERp72 activity and the most potent inhibitory antibody (anti-ERp72) selected for further testing in platelet functional assays. Results and conclusions Anti-ERp72 inhibited platelet aggregation, granule secretion, calcium mobilisation and integrin activation, revealing an important role for extracellular ERp72 in the regulation of platelet activation. Consistent with this, infusion of anti-ERp72 into mice protected against thrombosis.
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Affiliation(s)
- L.‐M. Holbrook
- School of Biological SciencesInstitute for Cardiovascular and Metabolic ResearchUniversity of ReadingReadingBerkshireUK
| | - G. K. Sandhar
- School of Biological SciencesInstitute for Cardiovascular and Metabolic ResearchUniversity of ReadingReadingBerkshireUK
| | - P. Sasikumar
- School of Biological SciencesInstitute for Cardiovascular and Metabolic ResearchUniversity of ReadingReadingBerkshireUK
| | - M. P. Schenk
- School of Biological SciencesInstitute for Cardiovascular and Metabolic ResearchUniversity of ReadingReadingBerkshireUK
| | - A. R. Stainer
- School of Biological SciencesInstitute for Cardiovascular and Metabolic ResearchUniversity of ReadingReadingBerkshireUK
| | - K. A. Sahli
- School of Biological SciencesInstitute for Cardiovascular and Metabolic ResearchUniversity of ReadingReadingBerkshireUK
| | - G. D. Flora
- School of Biological SciencesInstitute for Cardiovascular and Metabolic ResearchUniversity of ReadingReadingBerkshireUK
| | - A. B. Bicknell
- School of Biological SciencesInstitute for Cardiovascular and Metabolic ResearchUniversity of ReadingReadingBerkshireUK
| | - J. M. Gibbins
- School of Biological SciencesInstitute for Cardiovascular and Metabolic ResearchUniversity of ReadingReadingBerkshireUK
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Dhanya BP, Gopalan G, Sasikumar P, Neethu S, Meenu MT, Sharathna P, John J, Varughese S, Sabu M, Dan M, Radhakrishnan KV. Lewis-Acid-Catalyzed Activation of Zerumbone towards Sesquiterpenoid Derivatives: Sustainable Utilization of Abundant Natural Resources for the Synthesis of Chemically Diverse Architectures. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Bhandara Purayil Dhanya
- Organic Chemistry Section; National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
- Academy of Scientific and Innovative Research (AcSIR); National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
| | - Greeshma Gopalan
- Organic Chemistry Section; National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
- Academy of Scientific and Innovative Research (AcSIR); National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
| | - Parameswaran Sasikumar
- Organic Chemistry Section; National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
| | - Sivadas Neethu
- Organic Chemistry Section; National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
- Academy of Scientific and Innovative Research (AcSIR); National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
| | - Murugan Thulasi Meenu
- Organic Chemistry Section; National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
- Academy of Scientific and Innovative Research (AcSIR); National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
| | - Puthiyaparambath Sharathna
- Organic Chemistry Section; National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
- Academy of Scientific and Innovative Research (AcSIR); National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
| | - Jubi John
- Organic Chemistry Section; National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
- Academy of Scientific and Innovative Research (AcSIR); National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
| | - Sunil Varughese
- Organic Chemistry Section; National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
- Academy of Scientific and Innovative Research (AcSIR); National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
| | - Mamiyil Sabu
- Department of Botany; University of Calicut; Calicut-35 India
| | - Mathew Dan
- Genetic Resource Division; Jawaharlal Nehru Tropical Botanic Garden and Research Institute; Thiruvananthapuram-562 India)
| | - Kokkuvayil Vasu Radhakrishnan
- Organic Chemistry Section; National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
- Academy of Scientific and Innovative Research (AcSIR); National Institute for Interdisciplinary Science and Technology (CSIR); Thiruvananthapuram-19 India
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Sasikumar P, Prabha B, Chand SS, Aswathy M, Madhukrishnan M, Preethanuj P, Suresh E, Jaroschik F, Radhakrishnan KV. Lewis Acid Promoted Regioselective Double Hydro(hetero)arylation of 6,6′-Dialkyl-Substituted Pentafulvenes: A Facile Approach to Bisindole Derivatives. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Parameswaran Sasikumar
- Organic Chemistry section; National Institute for Interdisciplinary Science and Technology (CSIR); 695019 Thiruvananthapuram India
| | - Bernard Prabha
- Organic Chemistry section; National Institute for Interdisciplinary Science and Technology (CSIR); 695019 Thiruvananthapuram India
| | - Sarngadharan Sarath Chand
- Organic Chemistry section; National Institute for Interdisciplinary Science and Technology (CSIR); 695019 Thiruvananthapuram India
| | - Maniyamma Aswathy
- Organic Chemistry section; National Institute for Interdisciplinary Science and Technology (CSIR); 695019 Thiruvananthapuram India
| | - Murali Madhukrishnan
- Organic Chemistry section; National Institute for Interdisciplinary Science and Technology (CSIR); 695019 Thiruvananthapuram India
| | - Preethalayam Preethanuj
- Organic Chemistry section; National Institute for Interdisciplinary Science and Technology (CSIR); 695019 Thiruvananthapuram India
| | | | - Florian Jaroschik
- Institut de Chimie Moleculaire de Reims CNRS (UMR 7312); Université de Reims; 51687 Reims Cedex 2 France
| | - Kokkuvayil Vasu Radhakrishnan
- Organic Chemistry section; National Institute for Interdisciplinary Science and Technology (CSIR); 695019 Thiruvananthapuram India
- Academy of Scientific and Innovative Research (AcSIR); Thiruvananthapuram Kerala India
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Sasikumar P, Sudarshan N, Ramachandra R, Gowda N, Samiulla D, Bilugudi P, Adurthi S, Mani J, Nair R, Gowda N, Ramachandra M. Pre-clinical efficacy in multiple syngeneic models with oral immune checkpoint antagonists targeting PD-L1 and TIM-3. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)32890-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Sasikumar P, Prabha B, Reshmitha TR, Veluthoor S, Pradeep AK, Rohit KR, Dhanya BP, Sivan VV, Jithin MM, Kumar NA, Shibi IG, Nisha P, Radhakrishnan KV. Comparison of antidiabetic potential of (+) and (−)-hopeaphenol, a pair of enantiomers isolated from Ampelocissus indica (L.) and Vateria indica Linn., with respect to inhibition of digestive enzymes and induction of glucose uptake in L6 myotubes. RSC Adv 2016. [DOI: 10.1039/c6ra14334b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The remarkable α-glucosidase inhibition exhibited by the acetone extract of the rhizome of Ampelocissus indica (L.) and stem bark of Vateria indica Linn. (IC50 23.2 and 1.47 μg mL−1) encouraged us to isolate the phytochemicals from these plants.
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Vasanthakumar P, Pangayarselvi B, Sasikumar P, Chandrasekaran D, Doraisamy K, Purushothaman M. Performance of broilers fed ashwagandha (Withania somnifera) incorporated diets during summer season for alleviating heat stress. INDIAN J ANIM RES 2015. [DOI: 10.5958/0976-0555.2015.00082.5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Sarath Chand S, Sasidhar BS, Prakash P, Sasikumar P, Preethanuj P, Jaroschik F, Harakat D, Vasse JL, Radhakrishnan KV. Lewis acid catalyzed C-3 alkylidenecyclopentenylation of indoles: an easy access to functionalized indoles and bisindoles. RSC Adv 2015. [DOI: 10.1039/c5ra01107h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
A Lewis acid catalyzed C-3 alkylidenecyclopentenylation of indoles through the ring opening of pentafulvene derived diazabicyclic olefins has been developed toward the synthesis of indole and bisindole derivatives.
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Affiliation(s)
- S. Sarath Chand
- Academy of Scientific and Innovative Research (AcSIR)
- New Delhi 110001
- India
- Organic Chemistry Section
- National Institute for Interdisciplinary Science and Technology (CSIR)
| | - B. S. Sasidhar
- Academy of Scientific and Innovative Research (AcSIR)
- New Delhi 110001
- India
- Organic Chemistry Section
- National Institute for Interdisciplinary Science and Technology (CSIR)
| | - Praveen Prakash
- Organic Chemistry Section
- National Institute for Interdisciplinary Science and Technology (CSIR)
- Trivandrum 695019
- India
| | - P. Sasikumar
- Organic Chemistry Section
- National Institute for Interdisciplinary Science and Technology (CSIR)
- Trivandrum 695019
- India
| | - P. Preethanuj
- Organic Chemistry Section
- National Institute for Interdisciplinary Science and Technology (CSIR)
- Trivandrum 695019
- India
| | | | | | | | - K. V. Radhakrishnan
- Academy of Scientific and Innovative Research (AcSIR)
- New Delhi 110001
- India
- Organic Chemistry Section
- National Institute for Interdisciplinary Science and Technology (CSIR)
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Vaiyapuri S, Jones CI, Sasikumar P, Moraes LA, Ali MS, Sage T, Simon AM, Mahaut-Smith M, Gibbins JM. GAP JUNCTIONS AND CONNEXIN HEMICHANNELS UNDERPIN HAEMOSTASIS AND THROMBOSIS. Heart 2014. [DOI: 10.1136/heartjnl-2014-306916.53] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Prakash T, Sivasankaran S, Sasikumar P. Mechanical and Tribological Behaviour of Friction-Stir-Processed Al 6061 Aluminium Sheet Metal Reinforced with $${{\rm Al}_{2}{\rm O}_{3}/0.5\,{\rm Gr}}$$ Al 2 O 3 / 0.5 Gr Hybrid Surface Nanocomposite. Arab J Sci Eng 2014. [DOI: 10.1007/s13369-014-1518-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Jones CI, Tucker KL, Sasikumar P, Sage T, Kaiser WJ, Moore C, Emerson M, Gibbins JM. Integrin-linked kinase regulates the rate of platelet activation and is essential for the formation of stable thrombi. J Thromb Haemost 2014; 12:1342-52. [PMID: 24888521 DOI: 10.1111/jth.12620] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 05/21/2014] [Indexed: 12/18/2022]
Abstract
BACKGROUND Integrin-linked kinase (ILK) and its associated complex of proteins are involved in many cellular activation processes, including cell adhesion and integrin signaling. We have previously demonstrated that mice with induced platelet ILK deficiency show reduced platelet activation and aggregation, but only a minor bleeding defect. Here, we explore this apparent disparity between the cellular and hemostatic phenotypes. METHODS The impact of ILK inhibition on integrin αII b β3 activation and degranulation was assessed with the ILK-specific inhibitor QLT0267, and a conditional ILK-deficient mouse model was used to assess the impact of ILK deficiency on in vivo platelet aggregation and thrombus formation. RESULTS Inhibition of ILK reduced the rate of both fibrinogen binding and α-granule secretion, but was accompanied by only a moderate reduction in the maximum extent of platelet activation or aggregation in vitro. The reduction in the rate of fibrinogen binding occurred prior to degranulation or translocation of αII b β3 to the platelet surface. The change in the rate of platelet activation in the absence of functional ILK led to a reduction in platelet aggregation in vivo, but did not change the size of thrombi formed following laser injury of the cremaster arteriole wall in ILK-deficient mice. It did, however, result in a marked decrease in the stability of thrombi formed in ILK-deficient mice. CONCLUSION Taken together, the findings of this study indicate that, although ILK is not essential for platelet activation, it plays a critical role in facilitating rapid platelet activation, which is essential for stable thrombus formation.
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Affiliation(s)
- C I Jones
- Institute for Cardiovascular and Metabolic Research, School of Biological Sciences, University of Reading, Reading, UK
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Anbazhagan K, Sasikumar P, Gomathi S, Priya HP, Selvam GS. In vitro degradation of oxalate by recombinant Lactobacillus plantarum expressing heterologous oxalate decarboxylase. J Appl Microbiol 2013; 115:880-7. [PMID: 23734819 DOI: 10.1111/jam.12269] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 05/29/2013] [Accepted: 05/29/2013] [Indexed: 01/24/2023]
Abstract
AIM The aim of the present study is to constitutively express heterologous oxalate decarboxylase (OxdC) in Lactobacillus plantarum and to examine its ability to degrade oxalate in vitro for their future therapy against enteric hyperoxaluria. METHOD AND RESULTS In this study, we generated a recombinant strain of Lb. plantarum to constitutively overexpress B. subtilis oxalate decarboxylase (oxdC) using a host lactate dehydrogenase promoter (PldhL ). The recombinant Lb. plantarum was able to degrade more than 90% oxalate compared to 15% by the wild type. In addition, the recombinant strain also had higher tolerance up to 500 mmol l(-1) oxalate. CONCLUSION We developed a recombinant Lb. plantarum NC8 that constitutively expressed heterologous oxalate decarboxylase and degraded oxalate efficiently under in vitro conditions. SIGNIFICANCE AND IMPACT OF STUDY The long-term aim is to develop an efficient strain for future therapy against oxalosis.
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Affiliation(s)
- K Anbazhagan
- Department of Biochemistry, Centre for Excellence in Genomic Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai, India
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Gandhi GR, Sasikumar P. Antidiabetic effect of Merremia emarginata Burm. F. in streptozotocin induced diabetic rats. Asian Pac J Trop Biomed 2012; 2:281-6. [PMID: 23569914 PMCID: PMC3609299 DOI: 10.1016/s2221-1691(12)60023-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2011] [Revised: 11/03/2011] [Accepted: 11/25/2011] [Indexed: 01/16/2023] Open
Abstract
OBJECTIVE To investigate the antidiabetic property of Merremia emarginata (M. emarginata) Burm. F. plant in streptozotocin induced diabetic rats. METHODS The dose dependent effects of 28 days oral treatment with methanol extract (100, 200 and 400 mg/kg) from the plant of M. emarginata on blood glucose level, body weight, insulin, total hemoglobin, glycosylated haemoglobin (HbA1C), total protein, serum urea, serum creatinine and carbohydrate metabolizing enzymes were evaluated in streptozotocin induced diabetic rats. Histology of pancreas was also studied. RESULTS A significant decrease in blood glucose, serum urea and serum creatinine and significant increase in body weight, insulin and protein level were observed in diabetic rats treated with M. emarginata. Treatment with M. emarginata resulted in a significant reduction of HbA1C and an increase in total hemoglobin level. The activities of carbohydrate metabolizing enzymes such as hexokinase were significantly increased whereas glucose-6-phosphatase, fructose-1, 6-bisphosphatase were significantly decreased by the administration of M. emarginata in diabetic rats. Histology of diabetic rats treated with M. emarginata showed the pancreatic β-cells regeneration. CONCLUSIONS These findings suggest that M. emarginata has potent antidiabetic activity in streptozotocin induced diabetic rats.
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Affiliation(s)
- G Rajiv Gandhi
- Division of Ethnopharmacology, Loyola College, Chennai, India-600 034
| | - P Sasikumar
- Department of Biochemistry, School of Biological Sciences, Madurai Kamaraj University, Madurai, India-625 021
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Holbrook LM, Sasikumar P, Stanley RG, Simmonds AD, Bicknell AB, Gibbins JM. The platelet-surface thiol isomerase enzyme ERp57 modulates platelet function. J Thromb Haemost 2012; 10:278-88. [PMID: 22168334 PMCID: PMC3444690 DOI: 10.1111/j.1538-7836.2011.04593.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Accepted: 11/30/2011] [Indexed: 01/06/2023]
Abstract
BACKGROUND Thiol isomerases are a family of endoplasmic reticulum enzymes which orchestrate redox-based modifications of protein disulphide bonds. Previous studies have identified important roles for the thiol isomerases PDI and ERp5 in the regulation of normal platelet function. AIM Recently, we demonstrated the presence of a further five thiol isomerases at the platelet surface. In this report we aim to report the role of one of these enzymes - ERp57 in the regulation of platelet function. METHODS/RESULTS Using enzyme activity function blocking antibodies, we demonstrate a role for ERp57 in platelet aggregation, dense granule secretion, fibrinogen binding, calcium mobilisation and thrombus formation under arterial conditions. In addition to the effects of ERp57 on isolated platelets, we observe the presence of ERp57 in the developing thrombus in vivo. Furthermore the inhibition of ERp57 function was found to reduce laser-injury induced arterial thrombus formation in a murine model of thrombosis. CONCLUSIONS These data suggest that ERp57 is important for normal platelet function and opens up the possibility that the regulation of platelet function by a range of cell surface thiol isomerases may represent a broad paradigm for the regulation of haemostasis and thrombosis.
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Affiliation(s)
- L-M Holbrook
- Institute for Cardiovascular and Metabolic Research, School of Biological Sciences, University of Reading, Berkshire, UK.
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Sasikumar P, Kannan G, Haq AN. A heuristic based approach to vehicle routing model for Third Party Reverse Logistics provider. IJSTM 2009. [DOI: 10.1504/ijstm.2009.025039] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kannan G, Senthil P, Sasikumar P, Vinay V. A Nelder and Mead Methodology for Solving Small Fixed-Charge Transportation Problems. International Journal of Information Systems and Supply Chain Management 2008. [DOI: 10.4018/jisscm.2008100104] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- G. Kannan
- National Institute of Technology, India
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Kannan G, Haq AN, Sasikumar P. An application of the Analytical Hierarchy Process and Fuzzy Analytical Hierarchy Process in the selection of collecting centre location for the reverse logistics Multicriteria Decision-Making supply chain model. ACTA ACUST UNITED AC 2008. [DOI: 10.1504/ijmdm.2008.019360] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kannan G, Haq AN, Sasikumar P, Arunachalam S. Analysis and selection of green suppliers using interpretative structural modelling and analytic hierarchy process. ACTA ACUST UNITED AC 2008. [DOI: 10.1504/ijmdm.2008.017198] [Citation(s) in RCA: 106] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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