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Krishnakumar KA, Lankalapalli RS. Synthesis of Immucillins BCX‐1777 and BCX‐4430 from a Common Precursor. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- K. A. Krishnakumar
- National Institute for Interdisciplinary Science and Technology CSIR Chemical Sciences and Technology Division INDIA
| | - Ravi Shankar Lankalapalli
- CSIR-National Institute for Interdisciplinary Science & Technology Chemical Sciences and Technology Division Industrial Estate P.O. Pappanamcode. 695019 Thiruvananthapuram INDIA
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Thadathil DA, Varghese A, Ahamed CVS, Krishnakumar K, Varma SS, Lankalapalli RS, Radhakrishnan KV. Enzyme based bioelectrocatalysis over laccase immobilized poly-thiophene supported carbon fiber paper for the oxidation of D-ribofuranose to D-ribonolactone. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Gorantla JN, Maniganda S, Pengthaisong S, Ngiwsara L, Sawangareetrakul P, Chokchaisiri S, Kittakoop P, Svasti J, Ketudat Cairns JR. Chemoenzymatic and Protecting-Group-Free Synthesis of 1,4-Substituted 1,2,3-Triazole-α-d-glucosides with Potent Inhibitory Activity toward Lysosomal α-Glucosidase. ACS OMEGA 2021; 6:25710-25719. [PMID: 34632227 PMCID: PMC8495876 DOI: 10.1021/acsomega.1c03928] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 09/10/2021] [Indexed: 06/13/2023]
Abstract
α-Glucosyl triazoles have rarely been tested as α-glucosidase inhibitors, partly due to inefficient synthesis of their precursor α-d-glucosylazide (αGA1). Glycosynthase enzymes, made by nucleophile mutations of retaining β-glucosidases, produce αGA1 in chemical rescue experiments. Thermoanaerobacterium xylanolyticus glucosyl hydrolase 116 β-glucosidase (TxGH116) E441G nucleophile mutant catalyzed synthesis of αGA1 from sodium azide and pNP-β-d-glucoside (pNPGlc) or cellobiose in aqueous medium at 45 °C. The pNPGlc and azide reaction product was purified by Sephadex LH-20 column chromatography to yield 280 mg of pure αGA1 (68% yield). αGA1 was successfully conjugated with alkynes attached to different functional groups, including aryl, ether, amine, amide, ester, alcohol, and flavone via copper-catalyzed azide-alkyne cycloaddition (CuAAC) click chemistry reactions. These reactions afforded the 1,4-substituted 1,2,3-triazole-α-d-glucoside derivatives AGT2-14 without protection and deprotection. Several of these glucosyl triazoles exhibited strong inhibition of human lysosomal α-glucosidase, with IC50 values for AGT4 and AGT14 more than 60-fold lower than that of the commercial α-glucosidase inhibitor acarbose.
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Affiliation(s)
- Jaggaiah N. Gorantla
- Center
for Biomolecular Structure, Function and Application, School of Chemistry,
Institute of Science, Suranaree University
of Technology, Nakhon
Ratchasima 30000, Thailand
| | - Santhi Maniganda
- Center
for Biomolecular Structure, Function and Application, School of Chemistry,
Institute of Science, Suranaree University
of Technology, Nakhon
Ratchasima 30000, Thailand
| | - Salila Pengthaisong
- Center
for Biomolecular Structure, Function and Application, School of Chemistry,
Institute of Science, Suranaree University
of Technology, Nakhon
Ratchasima 30000, Thailand
| | - Lukana Ngiwsara
- Laboratory
of Biochemistry, Chulabhorn Research Institute, Bangkok 10210, Thailand
| | | | - Suwadee Chokchaisiri
- Center
for Biomolecular Structure, Function and Application, School of Chemistry,
Institute of Science, Suranaree University
of Technology, Nakhon
Ratchasima 30000, Thailand
| | - Prasat Kittakoop
- Chulabhorn
Graduate Institute, Chemical Sciences Program, Chulabhorn Royal Academy, Bangkok 10210, Thailand
| | - Jisnuson Svasti
- Laboratory
of Biochemistry, Chulabhorn Research Institute, Bangkok 10210, Thailand
| | - James R. Ketudat Cairns
- Center
for Biomolecular Structure, Function and Application, School of Chemistry,
Institute of Science, Suranaree University
of Technology, Nakhon
Ratchasima 30000, Thailand
- Laboratory
of Biochemistry, Chulabhorn Research Institute, Bangkok 10210, Thailand
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Thangarasu AK, Yadhukrishnan VO, Krishnakumar KA, Varma SS, Lankalapalli RS. Cu(I)-azidopyrrolo[3,2- d]pyrimidine Catalyzed Glaser-Hay Reaction under Mild Conditions. ACS ORGANIC & INORGANIC AU 2021; 2:3-7. [PMID: 36855403 PMCID: PMC9954286 DOI: 10.1021/acsorginorgau.1c00015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The limitation of the CuAAC "click" reaction with a 2-azidopyridine substrate, owing to its equilibrium with a tetrazole isomer, is exploited herein for its utility in the Glaser-Hay reaction. A catalytic combination of a 2-azidopyridine analogue, 4-azido-5H-pyrrolo[3,2-d]pyrimidine, and CuI afforded homocoupled products of terminal alkynes, without any trace of triazole product, under mild conditions with a broad substrate scope. Emphasis on carbohydrate-based substrates appended to a propargylic group led to 1,3-diynes in good to excellent yields.
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Affiliation(s)
- Arun K. Thangarasu
- Chemical
Sciences and Technology Division, CSIR-National
Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, India,Academy
of Scientific & Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Velickakathu O. Yadhukrishnan
- Chemical
Sciences and Technology Division, CSIR-National
Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, India
| | - K. A. Krishnakumar
- Chemical
Sciences and Technology Division, CSIR-National
Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, India,Academy
of Scientific & Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Sanjay Suresh Varma
- Chemical
Sciences and Technology Division, CSIR-National
Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, India
| | - Ravi S. Lankalapalli
- Chemical
Sciences and Technology Division, CSIR-National
Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, India,Academy
of Scientific & Innovative Research (AcSIR), Ghaziabad-201002, India,
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Abstract
Personalized cancer vaccines (PCVs) are reinvigorating vaccine strategies in cancer immunotherapy. In contrast to adoptive T-cell therapy and checkpoint blockade, the PCV strategy modulates the innate and adaptive immune systems with broader activation to redeploy antitumor immunity with individualized tumor-specific antigens (neoantigens). Following a sequential scheme of tumor biopsy, mutation analysis, and epitope prediction, the administration of neoantigens with synthetic long peptide (SLP) or mRNA formulations dramatically improves the population and activity of antigen-specific CD4+ and CD8+ T cells. Despite the promising prospect of PCVs, there is still great potential for optimizing prevaccination procedures and vaccine potency. In particular, the arduous development of tumor-associated antigen (TAA)-based vaccines provides valuable experience and rational principles for augmenting vaccine potency which is expected to advance PCV through the design of adjuvants, delivery systems, and immunosuppressive tumor microenvironment (TME) reversion since current personalized vaccination simply admixes antigens with adjuvants. Considering the broader application of TAA-based vaccine design, these two strategies complement each other and can lead to both personalized and universal therapeutic methods. Chemical strategies provide vast opportunities for (1) exploring novel adjuvants, including synthetic molecules and materials with optimizable activity, (2) constructing efficient and precise delivery systems to avoid systemic diffusion, improve biosafety, target secondary lymphoid organs, and enhance antigen presentation, and (3) combining bioengineering methods to innovate improvements in conventional vaccination, "smartly" re-educate the TME, and modulate antitumor immunity. As chemical strategies have proven versatility, reliability, and universality in the design of T cell- and B cell-based antitumor vaccines, the union of such numerous chemical methods in vaccine construction is expected to provide new vigor and vitality in cancer treatment.
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Affiliation(s)
- Wen-Hao Li
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, 100084 Beijing, China
| | - Yan-Mei Li
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, 100084 Beijing, China.,Beijing Institute for Brain Disorders, 100069 Beijing, China.,Center for Synthetic and Systems Biology, Tsinghua University, 100084 Beijing, China
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Reddy Bonam S, Naidu Gorantla J, Thangarasu AK, Lankalapalli RS, Sampath Kumar HM. Polyhydroxy-N-alkyl-2-pyrrolidinones as a new class of glycolipid analogues with immune modulation potential. J Carbohydr Chem 2018. [DOI: 10.1080/07328303.2017.1413193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Srinivasa Reddy Bonam
- Vaccine Immunology Laboratory, Natural Products Chemistry Division, Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Chemical Technology, Hyderabad, India
- CNRS UPR 3572, Laboratory of Immunopathology and Therapeutic Chemistry/Laboratory of Excellence MEDALIS, Institut de Biologie Moléculaire et Cellulaire, University of Strasbourg, Strasbourg, France
| | - Jaggaiah Naidu Gorantla
- Organic Chemistry Section, Chemical Sciences and Technology Division, Academy of Scientific and Innovative Research (AcSIR), CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala, India
| | - Arun Kumar Thangarasu
- Organic Chemistry Section, Chemical Sciences and Technology Division, Academy of Scientific and Innovative Research (AcSIR), CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala, India
| | - Ravi Shankar Lankalapalli
- Organic Chemistry Section, Chemical Sciences and Technology Division, Academy of Scientific and Innovative Research (AcSIR), CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala, India
| | - Halmuthur Mahabalarao Sampath Kumar
- Vaccine Immunology Laboratory, Natural Products Chemistry Division, Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Chemical Technology, Hyderabad, India
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