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Miao Q, Kadam VD, Mukherjee A, Tan Z, Teng M. Unlocking DCAFs To Catalyze Degrader Development: An Arena for Innovative Approaches. J Med Chem 2023; 66:13369-13383. [PMID: 37738232 DOI: 10.1021/acs.jmedchem.3c01209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/24/2023]
Abstract
Chemically induced proximity-based targeted protein degradation (TPD) has become a prominent paradigm in drug discovery. With the clinical benefit demonstrated by certain small-molecule protein degraders that target the cullin-RING E3 ubiquitin ligases (CRLs), the field has proactively strategized to tackle anticipated drug resistance by harnessing additional E3 ubiquitin ligases to enrich the arsenal of this therapeutic approach. Here, we endeavor to explore the collaborative efforts involved in unlocking a broad range of CRL4DCAF for degrader drug development. Throughout the discussion, we also highlight how both conventional and innovative approaches in drug discovery can be taken to realize this objective. Moving ahead, we expect a greater allocation of resources in TPD to pursue these high-hanging fruits.
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Affiliation(s)
- Qi Miao
- Center for Drug Discovery, Department of Pathology & Immunology, and Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, Houston, Texas 77030, United States
| | - Vilas D Kadam
- Center for Drug Discovery, Department of Pathology & Immunology, and Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, Houston, Texas 77030, United States
| | - Ayan Mukherjee
- Center for Drug Discovery, Department of Pathology & Immunology, and Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, Houston, Texas 77030, United States
| | - Zhi Tan
- Center for Drug Discovery, Department of Pathology & Immunology, and Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, Houston, Texas 77030, United States
| | - Mingxing Teng
- Center for Drug Discovery, Department of Pathology & Immunology, and Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, Houston, Texas 77030, United States
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Kadam VD, Feng B, Chen X, Liang W, Zhou F, Liu Y, Gao G, You J. Cascade C–H Annulation Reaction of Benzaldehydes, Anilines, and Alkynes toward Dibenzo[a,f]quinolizinium Salts: Discovery of Photostable Mitochondrial Trackers at the Nanomolar Level. Org Lett 2018; 20:7071-7075. [DOI: 10.1021/acs.orglett.8b03015] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vilas D. Kadam
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Boya Feng
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Xingyu Chen
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Wenbo Liang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Fulin Zhou
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Yanhong Liu
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Ge Gao
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Jingsong You
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
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Kadam VD, Rao B SS, Mahesh SK, Chakraborty M, Vemulapalli SPB, Dayaka SN, Sudhakar G. Stereoselective Access to the Core Structure of Macroline-Type Indole Alkaloids: Total Synthesis of Macroline and Alstomicine. Org Lett 2018; 20:4782-4786. [PMID: 30067369 DOI: 10.1021/acs.orglett.8b01921] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Rapid synthesis of the pentacyclic core structure of macroline-type indole alkaloids, and its application in the total synthesis of macroline and alstomicine is described. The core structure was accomplished in a highly stereocontrolled manner via two key steps, Ireland-Claisen rearrangement and Pictet-Spengler cyclization, commencing from a readily available starting material l-tryptophan, which obviated the need of a particular chiral source as an external catalyst, reagent, or internal auxiliary.
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Affiliation(s)
- Vilas D Kadam
- Academy of Scientific & Innovative Research (AcSIR) , New Delhi , India
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Tang J, Li S, Liu Z, Zhao Y, She Z, Kadam VD, Gao G, Lan J, You J. Cascade C–H Annulation of Aldoximes with Alkynes Using O2 as the Sole Oxidant: One-Pot Access to Multisubstituted Protoberberine Skeletons. Org Lett 2017; 19:604-607. [DOI: 10.1021/acs.orglett.6b03772] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Junbin Tang
- Key Laboratory of Green Chemistry
and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P.R. China
| | - Shiqing Li
- Key Laboratory of Green Chemistry
and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P.R. China
| | - Zheng Liu
- Key Laboratory of Green Chemistry
and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P.R. China
| | - Yinsong Zhao
- Key Laboratory of Green Chemistry
and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P.R. China
| | - Zhijie She
- Key Laboratory of Green Chemistry
and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P.R. China
| | - Vilas D. Kadam
- Key Laboratory of Green Chemistry
and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P.R. China
| | - Ge Gao
- Key Laboratory of Green Chemistry
and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P.R. China
| | - Jingbo Lan
- Key Laboratory of Green Chemistry
and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P.R. China
| | - Jingsong You
- Key Laboratory of Green Chemistry
and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P.R. China
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Feng B, Wan D, Yan L, Kadam VD, You J, Gao G. A facile access to substituted cationic 12-azapyrene salts by rhodium(iii)-catalyzed C–H annulation of N-arylpyridinium salts. RSC Adv 2016. [DOI: 10.1039/c6ra15464f] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Rhodium(iii)-catalyzed C–H annulation of N-arylpyridinium salts with internal alkynes directly affords substituted cationic 12-azapyrene salts, which exhibit tunable and intense fluorescence.
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Affiliation(s)
- Boya Feng
- Key Laboratory of Green Chemistry and Technology of Ministry of Education
- College of Chemistry
- Chengdu 610064
- P. R. China
| | - Danyang Wan
- Key Laboratory of Green Chemistry and Technology of Ministry of Education
- College of Chemistry
- Chengdu 610064
- P. R. China
| | - Lipeng Yan
- Key Laboratory of Green Chemistry and Technology of Ministry of Education
- College of Chemistry
- Chengdu 610064
- P. R. China
| | - Vilas D. Kadam
- Key Laboratory of Green Chemistry and Technology of Ministry of Education
- College of Chemistry
- Chengdu 610064
- P. R. China
| | - Jingsong You
- Key Laboratory of Green Chemistry and Technology of Ministry of Education
- College of Chemistry
- Chengdu 610064
- P. R. China
| | - Ge Gao
- Key Laboratory of Green Chemistry and Technology of Ministry of Education
- College of Chemistry
- Chengdu 610064
- P. R. China
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Sudhakar G, Bayya S, Kadam VD, Nanubolu JB. Total synthesis of gonytolides C and G, lachnone C, and formal synthesis of blennolide C and diversonol. Org Biomol Chem 2014; 12:5601-10. [DOI: 10.1039/c4ob00950a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The total syntheses of gonytolide C and related compounds have been accomplished from the aldol reaction between acetophenone derived from orcinol and butyrolactone containing ketone, followed by the diastereoselective intramolecular cyclization.
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Affiliation(s)
- Gangarajula Sudhakar
- Division of CPC (Organic Chemistry-II)
- CSIR-Indian Institute of Chemical Technology
- Tarnaka, India
- Academy of Scientific and Innovative Research
- New Delhi, India
| | - Shruthi Bayya
- Division of CPC (Organic Chemistry-II)
- CSIR-Indian Institute of Chemical Technology
- Tarnaka, India
- Academy of Scientific and Innovative Research
- New Delhi, India
| | - Vilas D. Kadam
- Division of CPC (Organic Chemistry-II)
- CSIR-Indian Institute of Chemical Technology
- Tarnaka, India
- Academy of Scientific and Innovative Research
- New Delhi, India
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Abstract
A first total synthesis of acortatarins A, B, and an enantiomer of the proposed structure of acortatarin B is described by using readily available d-sugars. This convergent total synthesis revealed the revision of the absolute configuration of acortatarin A and structural revision of acortatarin B. The key steps involved are regioselective epoxide opening with deprotonated 2,5-disubstituted pyrrole and spiroketalization.
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Affiliation(s)
- Gangarajula Sudhakar
- Organic Chemistry Division-II, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 607, India.
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Abstract
The optimum temperature for the growth of porcine stable (PS) kidney cell line is 37 degrees C. We have adapted the cell line to grow at 40 degrees C. The original cell line grown at 37 degrees C has been denoted as PS-37, and the adapted new strain has been denoted as PS-40. Both the cell lines were screened for mycoplasma by Hoechst staining and tritiated uridine-uracil uptake and were found to be negative. Comparative characterization of PS-40 and its progenitor PS-37 cell line was done by using various parameters. The antigenic studies indicated that the new cell strain was not cross-contaminated with any other cell lines. It was observed that PS-40 cells were more fibroblastic with clean cytoplasm and appeared healthy. The growth of PS-40 cells was faster than the original cell line. The karyological study showed heteroploid chromosome number in PS-40 cells. The modal chromosome number of PS-40 cells was 58, whereas that of PS-37 cell line was 38. The lactic dehydrogenase isoenzyme pattern showed a cathodal shift of bands. The PS-40 cell strain could be cryopreserved and revived. The viability of PS-37 as well as PS-40 cell lines is in the range of 90-95%, and the growth characteristics of thawed cells showed six- to eightfold multiplications within 5 d. The virus susceptibility study revealed that the cytopathic effect was more profound and observed 1 d earlier in PS-40 cell line. Increased yields of Japanese encephalitis, Sindbis, and Semliki forest viruses were obtained by 1.8, 1.75, and 1.5 log plaque-forming units/ml, respectively. The yield of West Nile virus was, however, comparable to that in PS-37 cell line. Both the cell lines were refractory to Dengue viruses.
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Affiliation(s)
- Smita Paranjape
- National Institute of Virology, 20A Dr. Ambedkar Road, Pune 411 001, Maharashtra, India.
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Kadam VD, Paranjape SP, Gangodkar SV, Deolankar RP. Nutrient composition for cultivation of Japanese encephalitis virus in vitro. Acta Virol 1995; 39:287-9. [PMID: 8722300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Effects of certain groups of nutrients such as glucose, essential amino acids (AA), nonessential AA, vitamins and trace nutrients on the multiplication of various strains of Japanese encephalitis virus (JEV) were studied with an aim to optimise the conditions for cultivation of the virus in porcine stable (PS) kidney cell cultures. Eagle's Minimal Essential Medium (MEM) was modified by addition of the nutrients in different concentrations and combinations. Glucose was found the most important single nutrient in promoting significantly the virus multiplication. Essential AA alone did not influence the virus yield, while in combination with glucose they caused its marked increase. Vitamins and other nutrients did not stimulate significantly virus multiplication. The study revealed that the extent of the glucose effect depends on the virus strain used.
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Affiliation(s)
- V D Kadam
- National Institute of Virology, Pune, India
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Paranjape SP, Kadam VD, Deolankar RP. Increased yields of Japanese encephalitis virus in heat shocked cell cultures. Acta Virol 1994; 38:333-7. [PMID: 7793357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Monolayers of porcine stable kidney (PS) and baby hamster kidney (BHK-21) cell lines were exposed to 43 degrees C and 41 degrees C, respectively, for 4 hrs and infected with Japanese encephalitis virus (JEV) Nakayama strain at low and high multiplicity of infection. Virus yields were increased by 0.2-2.5 log PFU/ml in heat shocked cultures compared to control cultures at 37 degrees C. This phenomenon was detected in the late phase of replication after 16 hrs post infection. The progeny virus obtained from heat shocked cultures was more thermostable.
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