1
|
Henry SP, Liosi ME, Ippolito JA, Menges F, Newton AS, Schlessinger J, Jorgensen WL. Covalent Modification of the JH2 Domain of Janus Kinase 2. ACS Med Chem Lett 2022; 13:1819-1826. [PMID: 36385940 PMCID: PMC9661697 DOI: 10.1021/acsmedchemlett.2c00414] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 10/18/2022] [Indexed: 11/28/2022] Open
Abstract
Probe molecules that covalently modify the JAK2 pseudokinase domain (JH2) are reported. Selective targeting of JH2 domains over the kinase (JH1) domains is a necessary feature for ligands intended to evaluate JH2 domains as therapeutic targets. The JH2 domains of three Janus kinases (JAK1, JAK2, and TYK2) possess a cysteine residue in the catalytic loop that does not occur in their JH1 domains. Starting from a non-selective kinase binding molecule, computer-aided design directed attachment of substituents terminating in acrylamide warheads to modify Cys675 of JAK2 JH2. Successful covalent attachment was demonstrated first through observation of enhanced binding with increasing incubation time in fluorescence polarization experiments. Covalent binding also increased selectivity to as much as ca. 30-fold for binding the JAK2 JH2 domain over the JH1 domain after a 20-h incubation. Covalency was confirmed through HPLC electrospray quadrupole time-of-flight HRMS experiments, which revealed the expected mass shifts.
Collapse
Affiliation(s)
- Sean P. Henry
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Maria-Elena Liosi
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Joseph A. Ippolito
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Fabian Menges
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Ana S. Newton
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Joseph Schlessinger
- Department
of Pharmacology, Yale University School
of Medicine, New Haven, Connecticut 06520-8066, United States
| | - William L. Jorgensen
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| |
Collapse
|
2
|
Liosi ME, Ippolito JA, Henry SP, Krimmer SG, Newton AS, Cutrona KJ, Olivarez RA, Mohanty J, Schlessinger J, Jorgensen WL. Insights on JAK2 Modulation by Potent, Selective, and Cell-Permeable Pseudokinase-Domain Ligands. J Med Chem 2022; 65:8380-8400. [PMID: 35653642 PMCID: PMC9939005 DOI: 10.1021/acs.jmedchem.2c00283] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
JAK2 is a non-receptor tyrosine kinase that regulates hematopoiesis through the JAK-STAT pathway. The pseudokinase domain (JH2) is an important regulator of the activity of the kinase domain (JH1). V617F mutation in JH2 has been associated with the pathogenesis of various myeloproliferative neoplasms, but JAK2 JH2 has been poorly explored as a pharmacological target. In light of this, we aimed to develop JAK2 JH2 binders that could selectively target JH2 over JH1 and test their capacity to modulate JAK2 activity in cells. Toward this goal, we optimized a diaminotriazole lead compound into potent, selective, and cell-permeable JH2 binders leveraging computational design, synthesis, binding affinity measurements for the JH1, JH2 WT, and JH2 V617F domains, permeability measurements, crystallography, and cell assays. Optimized diaminotriazoles are capable of inhibiting STAT5 phosphorylation in both WT and V617F JAK2 in cells.
Collapse
Affiliation(s)
- Maria-Elena Liosi
- Department of Chemistry, Yale University, New Haven, CT 06520-8107, USA
| | | | - Sean P. Henry
- Department of Chemistry, Yale University, New Haven, CT 06520-8107, USA
| | - Stefan G. Krimmer
- Department of Chemistry, Yale University, New Haven, CT 06520-8107, USA,Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520-8066, USA
| | - Ana S. Newton
- Department of Chemistry, Yale University, New Haven, CT 06520-8107, USA
| | - Kara J. Cutrona
- Department of Chemistry, Yale University, New Haven, CT 06520-8107, USA
| | - Rene A. Olivarez
- Department of Chemistry, Yale University, New Haven, CT 06520-8107, USA
| | - Jyotidarsini Mohanty
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520-8066, USA
| | - Joseph Schlessinger
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520-8066, USA
| | - William L. Jorgensen
- Department of Chemistry, Yale University, New Haven, CT 06520-8107, USA,Corresponding author. William L. Jorgensen.
| |
Collapse
|
3
|
Henry SP, Liosi ME, Ippolito JA, Cutrona KJ, Krimmer SG, Newton AS, Schlessinger J, Jorgensen WL. Conversion of a False Virtual Screen Hit into Selective JAK2 JH2 Domain Binders Using Convergent Design Strategies. ACS Med Chem Lett 2022; 13:819-826. [PMID: 35586418 PMCID: PMC9109162 DOI: 10.1021/acsmedchemlett.2c00051] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [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: 02/09/2022] [Accepted: 04/19/2022] [Indexed: 12/12/2022] Open
Abstract
The Janus kinase 2 (JAK2) pseudokinase domain (JH2) is an ATP-binding domain that regulates the activity of the catalytic tyrosine kinase domain (JH1). Dysregulation of JAK2 JH1 signaling caused by the V617F mutation in JH2 is implicated in various myeloproliferative neoplasms. To explore if JAK2 activity can be modulated by a small molecule binding to the ATP site in JH2, we have developed several ligand series aimed at selectively targeting the JAK2 JH2 domain. We report here the evolution of a false virtual screen hit into a new JAK2 JH2 series. Optimization guided by computational modeling has yielded analogues with nanomolar affinity for the JAK2 JH2 domain and >100-fold selectivity for the JH2 domain over the JH1 domain. A crystal structure for one of the potent compounds bound to JAK2 JH2 clarifies the origins of the strong binding and selectivity. The compounds expand the platform for seeking molecules to regulate JAK2 signaling, including V617F JAK2 hyperactivation.
Collapse
Affiliation(s)
- Sean P. Henry
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Maria-Elena Liosi
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Joseph A. Ippolito
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Kara J. Cutrona
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Stefan G. Krimmer
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States,Department
of Pharmacology, Yale University School
of Medicine, New Haven, Connecticut 06520-8066, United States
| | - Ana S. Newton
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Joseph Schlessinger
- Department
of Pharmacology, Yale University School
of Medicine, New Haven, Connecticut 06520-8066, United States
| | - William L. Jorgensen
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States,
| |
Collapse
|
4
|
Newton AS, Liosi ME, Henry SP, Deiana L, Faver JC, Krimmer SG, Puleo DE, Schlessinger J, Jorgensen WL. Indoloxytriazines as binding molecules for the JAK2 JH2 pseudokinase domain and its V617F variant. Tetrahedron Lett 2021; 77. [PMID: 34393283 DOI: 10.1016/j.tetlet.2021.153248] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Small molecules that selectively bind to the pseudokinase JH2 domain over the JH1 kinase domain of JAK2 kinase are sought. Virtual screening led to the purchase of 17 compounds among which 9 were found to bind to V617F JAK2 JH2 with affinities of 40 - 300 μM in a fluorogenic assay. Ten analogues were then purchased yielding 9 additional active compounds. Aminoanilinyltriazine 22 was particularly notable as it shows no detectable binding to JAK2 JH1, and it has a 65-μM dissociation constant K d with V617F JAK2 JH2. A crystal structure for 22 in complex with wild-type JAK2 JH2 was obtained to elucidate the binding mode. Additional de novo design led to the synthesis of 19 analogues of 22 with the most potent being 33n with K d values of 2-3 μM for WT and V617F JAK2 JH2, and with 16-fold selectivity relative to binding with WT JAK2 JH1.
Collapse
Affiliation(s)
- Ana S Newton
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107
| | - Maria-Elena Liosi
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107
| | - Sean P Henry
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107
| | - Luca Deiana
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107
| | - John C Faver
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107
| | - Stefan G Krimmer
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107.,Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520-8066
| | - David E Puleo
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520-8066
| | - Joseph Schlessinger
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520-8066
| | | |
Collapse
|
5
|
Cutrona KJ, Newton AS, Krimmer SG, Tirado-Rives J, Jorgensen WL. Metadynamics as a Postprocessing Method for Virtual Screening with Application to the Pseudokinase Domain of JAK2. J Chem Inf Model 2020; 60:4403-4415. [PMID: 32383599 DOI: 10.1021/acs.jcim.0c00276] [Citation(s) in RCA: 9] [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: 02/08/2023]
Abstract
With standard scoring methods, top-ranked compounds from virtual screening by docking often turn out to be inactive. For this reason, metadynamics, a method used to sample rare events, was studied to further evaluate docking poses with the aim of reducing false positives. Specifically, virtual screening was performed with Glide SP to seek potential molecules to bind to the ATP site in the pseudokinase domain of JAK2 kinase, and promising compounds were selected from the top-ranked 1000 based on visualization. Rescoring with Glide XP, GOLD, and MM/GBSA was unable to differentiate well between active and inactive compounds. Metadynamics was then used to gauge the relative binding affinity from the required time or the potential of mean force needed to dissociate the ligand from the bound complex. With consideration of previously known binders of varying affinities, metadynamics was able to differentiate between the most active compounds and inactive or weakly active ones, and it could identify correctly most of the selected virtual screening compounds as false positives. Thus, metadynamics has the potential to be a viable postprocessing method for virtual screening, minimizing the expense of buying or synthesizing inactive compounds.
Collapse
Affiliation(s)
- Kara J Cutrona
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Ana S Newton
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Stefan G Krimmer
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Julian Tirado-Rives
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - William L Jorgensen
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| |
Collapse
|
6
|
Newton AS, Faver JC, Micevic G, Muthusamy V, Kudalkar SN, Bertoletti N, Anderson KS, Bosenberg MW, Jorgensen WL. Structure-Guided Identification of DNMT3B Inhibitors. ACS Med Chem Lett 2020; 11:971-976. [PMID: 32435413 DOI: 10.1021/acsmedchemlett.0c00011] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 02/07/2020] [Indexed: 02/07/2023] Open
Abstract
Methyltransferase 3 beta (DNMT3B) inhibitors that interfere with cancer growth are emerging possibilities for treatment of melanoma. Herein we identify small molecule inhibitors of DNMT3B starting from a homology model based on a DNMT3A crystal structure. Virtual screening by docking led to purchase of 15 compounds, among which 5 were found to inhibit the activity of DNMT3B with IC50 values of 13-72 μM in a fluorogenic assay. Eight analogues of 7, 10, and 12 were purchased to provide 2 more active compounds. Compound 11 is particularly notable as it shows good selectivity with no inhibition of DNMT1 and 22 μM potency toward DNMT3B. Following additional de novo design, exploratory synthesis of 17 analogues of 11 delivered 5 additional inhibitors of DNMT3B with the most potent being 33h with an IC50 of 8.0 μM. This result was well confirmed in an ultrahigh-performance liquid chromatography (UHPLC)-based analytical assay, which yielded an IC50 of 4.8 μM. Structure-activity data are rationalized based on computed structures for DNMT3B complexes.
Collapse
Affiliation(s)
- Ana S. Newton
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - John C. Faver
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | | | | | | | | | | | | | - William L. Jorgensen
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| |
Collapse
|
7
|
Liosi ME, Krimmer SG, Newton AS, Dawson TK, Puleo DE, Cutrona KJ, Suzuki Y, Schlessinger J, Jorgensen WL. Selective Janus Kinase 2 (JAK2) Pseudokinase Ligands with a Diaminotriazole Core. J Med Chem 2020; 63:5324-5340. [PMID: 32329617 DOI: 10.1021/acs.jmedchem.0c00192] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Janus kinases (JAKs) are non-receptor tyrosine kinases that are essential components of the JAK-STAT signaling pathway. Associated aberrant signaling is responsible for many forms of cancer and disorders of the immune system. The present focus is on the discovery of molecules that may regulate the activity of JAK2 by selective binding to the JAK2 pseudokinase domain, JH2. Specifically, the Val617Phe mutation in JH2 stimulates the activity of the adjacent kinase domain (JH1) resulting in myeloproliferative disorders. Starting from a non-selective screening hit, we have achieved the goal of discovering molecules that preferentially bind to the ATP binding site in JH2 instead of JH1. We report the design and synthesis of the compounds and binding results for the JH1, JH2, and JH2 V617F domains, as well as five crystal structures for JH2 complexes. Testing with a selective and non-selective JH2 binder on the autophosphorylation of wild-type and V617F JAK2 is also contrasted.
Collapse
Affiliation(s)
- Maria-Elena Liosi
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Stefan G Krimmer
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Ana S Newton
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Thomas K Dawson
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - David E Puleo
- Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut 06520-8066, United States
| | - Kara J Cutrona
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Yoshihisa Suzuki
- Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut 06520-8066, United States
| | - Joseph Schlessinger
- Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut 06520-8066, United States
| | - William L Jorgensen
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| |
Collapse
|
8
|
Damanhoury S, Newton AS, Rashid M, Hartling L, Byrne JLS, Ball GDC. Defining metabolically healthy obesity in children: a scoping review. Obes Rev 2018; 19:1476-1491. [PMID: 30156016 DOI: 10.1111/obr.12721] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 05/17/2018] [Accepted: 05/18/2018] [Indexed: 01/01/2023]
Abstract
We conducted a scoping review to identify definitions of metabolically healthy obesity (MHO), describe gaps in the literature, and establish a universal definition of MHO in children. We searched electronic databases from January 1980 to June 2017 and grey literature. Experimental, quasi-experimental, or observational studies were eligible for inclusion if they (i) included a definition of MHO that identified risk factors, cut-off values, and the number of criteria used to define MHO, and (ii) classified 2-18 year olds as overweight or obese. Two reviewers independently screened 1,711 papers for relevance and quality; we extracted data from 39 individual reports that met inclusion criteria. Most (31/39; 79%) definitions of MHO included an absence of cardiometabolic risk factors. Heterogeneity across MHO definitions, obesity criteria, and sample sizes/characteristics resulted in variable prevalence estimates (3-80%). Finally, we convened an international panel of 46 experts to complete a 4-round Delphi process to generate a consensus-based definition of MHO. Based on consensus (≥ 80% agreement), our definition of MHO included: high density lipoprotein-cholesterol > 40 mg/dl (or > 1.03 mmol/l), triglycerides ≤ 150 mg/dl (or ≤ 1.7 mmol/l), systolic and diastolic blood pressure ≤ 90th percentile, and a measure of glycemia. This definition of MHO holds potential universal value to enable comparisons between studies and inform clinical decision-making for children with obesity.
Collapse
Affiliation(s)
- S Damanhoury
- Department of Agricultural, Food, and Nutritional Science, Faculty of Agricultural, Life, and Environmental Sciences, University of Alberta, Edmonton, AB, Canada
| | - A S Newton
- Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - M Rashid
- Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - L Hartling
- Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - J L S Byrne
- Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - G D C Ball
- Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| |
Collapse
|
9
|
Dawson TK, Dziedzic P, Robertson MJ, Cisneros JA, Krimmer SG, Newton AS, Tirado-Rives J, Jorgensen WL. Adding a Hydrogen Bond May Not Help: Naphthyridinone vs Quinoline Inhibitors of Macrophage Migration Inhibitory Factor. ACS Med Chem Lett 2017; 8:1287-1291. [PMID: 29259749 DOI: 10.1021/acsmedchemlett.7b00384] [Citation(s) in RCA: 8] [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] [Received: 09/21/2017] [Accepted: 11/10/2017] [Indexed: 02/08/2023] Open
Abstract
Coordination of the ammonium group of Lys32 in the active site of human macrophage migration inhibitory factor (MIF) using a 1,7-naphthyridin-8-one instead of a quinoline is investigated. Both gas- and aqueous-phase DFT calculations for model systems indicate potential benefits for the added hydrogen bond with the lactam carbonyl group, while FEP results are neutral. Three crystal structures are reported for complexes of MIF with 3a, 4a, and 4b, which show that the desired hydrogen bond is formed with O-N distances of 2.8-3.0 Å. Compound 4b is the most potent new MIF inhibitor with Ki and Kd values of 90 and 94 nM; it also has excellent aqueous solubility, 288 μg/mL. Consistent with the FEP results, the naphthyridinones are found to have similar potency as related quinolines in spite of the additional protein-ligand hydrogen bond.
Collapse
Affiliation(s)
- Thomas K. Dawson
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Pawel Dziedzic
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Michael J. Robertson
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - José A. Cisneros
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Stefan G. Krimmer
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Ana S. Newton
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Julian Tirado-Rives
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - William L. Jorgensen
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| |
Collapse
|
10
|
Newton AS, Deiana L, Puleo DE, Cisneros JA, Cutrona KJ, Schlessinger J, Jorgensen WL. JAK2 JH2 Fluorescence Polarization Assay and Crystal Structures for Complexes with Three Small Molecules. ACS Med Chem Lett 2017. [PMID: 28626520 DOI: 10.1021/acsmedchemlett.7b00154] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
A competitive fluorescence polarization (FP) assay is reported for determining binding affinities of probe molecules with the pseudokinase JAK2 JH2 allosteric site. The syntheses of the fluorescent 5 and 6 used in the assay are reported as well as Kd results for 10 compounds, including JNJ7706621, NVP-BSK805, and filgotinib (GLPG0634). X-ray crystal structures of JAK2 JH2 in complex with NVP-BSK805, filgotinib, and diaminopyrimidine 8 elucidate the binding poses.
Collapse
Affiliation(s)
- Ana S. Newton
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Luca Deiana
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - David E. Puleo
- Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut 06520-8066, United States
| | - José A. Cisneros
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Kara J. Cutrona
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Joseph Schlessinger
- Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut 06520-8066, United States
| | - William L. Jorgensen
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| |
Collapse
|
11
|
Puleo DE, Kucera K, Hammarén HM, Ungureanu D, Newton AS, Silvennoinen O, Jorgensen WL, Schlessinger J. Identification and Characterization of JAK2 Pseudokinase Domain Small Molecule Binders. ACS Med Chem Lett 2017. [PMID: 28626521 DOI: 10.1021/acsmedchemlett.7b00153] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Janus kinases (JAKs) regulate hematopoiesis via the cytokine-mediated JAK-STAT signaling pathway. JAKs contain tandem C-terminal pseudokinase (JH2) and tyrosine kinase (JH1) domains. The JAK2 pseudokinase domain adopts a protein kinase fold and, despite its pseudokinase designation, binds ATP with micromolar affinity. Recent evidence shows that displacing ATP from the JAK2 JH2 domain alters the hyperactivation state of the oncogenic JAK2 V617F protein while sparing the wild type JAK2 protein. In this study, small molecule binders of JAK2 JH2 were identified via an in vitro screen. Top hits were characterized using biophysical and structural approaches. Development of pseudokinase-selective compounds may offer novel pharmacological opportunities for treating cancers driven by JAK2 V617F and other oncogenic JAK mutants.
Collapse
Affiliation(s)
| | | | - Henrik M. Hammarén
- Faculty
of Medicine and Biosciences, University of Tampere, Tampere 33014, Finland
| | - Daniela Ungureanu
- Faculty
of Medicine and Biosciences, University of Tampere, Tampere 33014, Finland
| | | | - Olli Silvennoinen
- Faculty
of Medicine and Biosciences, University of Tampere, Tampere 33014, Finland
| | | | | |
Collapse
|
12
|
Carrasco MP, Newton AS, Gonçalves L, Góis A, Machado M, Gut J, Nogueira F, Hänscheid T, Guedes RC, dos Santos DJVA, Rosenthal PJ, Moreira R. Probing the aurone scaffold against Plasmodium falciparum: design, synthesis and antimalarial activity. Eur J Med Chem 2014; 80:523-34. [PMID: 24813880 DOI: 10.1016/j.ejmech.2014.04.076] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [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: 11/09/2013] [Revised: 04/24/2014] [Accepted: 04/25/2014] [Indexed: 11/18/2022]
Abstract
A library comprising 44 diversely substituted aurones derivatives was synthesized by straightforward aldol condensation reactions of benzofuranones and the appropriately substituted benzaldehydes. Microwave enhanced synthesis using palladium catalyzed protocols was introduced as a powerful strategy for extending the chemical space around the aurone scaffold. Additionally, Mannich-base derivatives, containing a 7-aminomethyl-6-hydroxy substitution pattern at ring A, were also prepared. Screening against the chloroquine resistant Plasmodium falciparum W2 strain identified novel aurones with IC50 values in the low micromolar range. The most potent compounds contained a basic moiety, with the ability to accumulate in acidic digestive vacuole of the malaria parasite. However, none of those aurones revealed significant activity against hemozoin formation and falcipain-2, two validated targets expressed during the blood stage of P. falciparum infection and functional in digestive vacuole of the parasite. Overall, this study highlight (i) the usefulness of aurones as platforms for synthetic procedures using palladium catalyzed protocols to rapidly deliver lead compounds for further optimization and (ii) the potential of novel aurone derivatives as promising antimalarial compounds.
Collapse
Affiliation(s)
- Marta P Carrasco
- Instituto de Investigação do Medicamento (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto 1649-003 Lisboa, Portugal
| | - Ana S Newton
- Instituto de Investigação do Medicamento (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto 1649-003 Lisboa, Portugal
| | - Lídia Gonçalves
- Instituto de Investigação do Medicamento (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto 1649-003 Lisboa, Portugal
| | - Ana Góis
- Unidade de Microbiologia Molecular e Infecção, Instituto de Medicina Molecular, Faculdade de Medicina de Lisboa, 1649-028 Lisboa, Portugal
| | - Marta Machado
- Centro de Malária e outras Doenças Tropicais, Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa, 1349-008 Lisboa, Portugal
| | - Jiri Gut
- Department of Medicine, San Francisco General Hospital, University of California, San Francisco, Box 0811, San Francisco, CA 94143, USA
| | - Fátima Nogueira
- Centro de Malária e outras Doenças Tropicais, Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa, 1349-008 Lisboa, Portugal
| | - Thomas Hänscheid
- Unidade de Microbiologia Molecular e Infecção, Instituto de Medicina Molecular, Faculdade de Medicina de Lisboa, 1649-028 Lisboa, Portugal
| | - Rita C Guedes
- Instituto de Investigação do Medicamento (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto 1649-003 Lisboa, Portugal
| | - Daniel J V A dos Santos
- Instituto de Investigação do Medicamento (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto 1649-003 Lisboa, Portugal
| | - Philip J Rosenthal
- Department of Medicine, San Francisco General Hospital, University of California, San Francisco, Box 0811, San Francisco, CA 94143, USA
| | - Rui Moreira
- Instituto de Investigação do Medicamento (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto 1649-003 Lisboa, Portugal.
| |
Collapse
|
13
|
Mugumbate G, Newton AS, Rosenthal PJ, Gut J, Moreira R, Chibale K, Guedes RC. Novel anti-plasmodial hits identified by virtual screening of the ZINC database. J Comput Aided Mol Des 2013; 27:859-71. [PMID: 24158745 DOI: 10.1007/s10822-013-9685-z] [Citation(s) in RCA: 11] [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] [Received: 06/05/2013] [Accepted: 10/12/2013] [Indexed: 01/16/2023]
Abstract
Increased resistance of Plasmodium falciparum to most available drugs challenges the control of malaria. Studies with protease inhibitors have suggested important roles for the falcipain family of cysteine proteases. These enzymes act in concert with other proteases to hydrolyze host erythrocyte hemoglobin in the parasite food vacuole. In order to find potential new antimalarial drugs, we screened in silico the ZINC database using two different protocols involving structure- and ligand-based methodologies. Our search identified 19 novel low micromolar inhibitors of cultured chloroquine resistant P. falciparum. The most active compound presented an IC50 value of 0.5 μM against cultured parasites and it also inhibited the cysteine protease falcipain-2 (IC50 = 25.5 μM). These results identify novel classes of antimalarials that are structurally different from those currently in use and which can be further derivatized to deliver leads suitable for optimisation.
Collapse
Affiliation(s)
- Grace Mugumbate
- Department of Chemistry, University of Cape Town, Rondebosch, 7701, South Africa
| | | | | | | | | | | | | |
Collapse
|
14
|
Oliveira R, Newton AS, Guedes RC, Miranda D, Amewu RK, Srivastava A, Gut J, Rosenthal PJ, O'Neill PM, Ward SA, Lopes F, Moreira R. An Endoperoxide‐Based Hybrid Approach to Deliver Falcipain Inhibitors Inside Malaria Parasites. ChemMedChem 2013; 8:1528-36. [DOI: 10.1002/cmdc.201300202] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Revised: 06/14/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Rudi Oliveira
- iMed.UL and Department of Pharmaceutical and Medicinal Chemistry, Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, Lisbon, 1649‐003 (Portugal)
| | - Ana S. Newton
- iMed.UL and Department of Pharmaceutical and Medicinal Chemistry, Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, Lisbon, 1649‐003 (Portugal)
| | - Rita C. Guedes
- iMed.UL and Department of Pharmaceutical and Medicinal Chemistry, Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, Lisbon, 1649‐003 (Portugal)
| | - Daniela Miranda
- iMed.UL and Department of Pharmaceutical and Medicinal Chemistry, Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, Lisbon, 1649‐003 (Portugal)
| | - Richard K. Amewu
- Department of Chemistry, University of Liverpool, Liverpool, L69 3BX (UK)
| | - Abhishek Srivastava
- Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA (UK)
| | - Jiri Gut
- Department of Medicine, University of California, San Francisco, CA 94143 (USA)
| | - Philip J. Rosenthal
- Department of Medicine, University of California, San Francisco, CA 94143 (USA)
| | - Paul M. O'Neill
- Department of Chemistry, University of Liverpool, Liverpool, L69 3BX (UK)
| | - Stephen A. Ward
- Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA (UK)
| | - Francisca Lopes
- iMed.UL and Department of Pharmaceutical and Medicinal Chemistry, Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, Lisbon, 1649‐003 (Portugal)
| | - Rui Moreira
- iMed.UL and Department of Pharmaceutical and Medicinal Chemistry, Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, Lisbon, 1649‐003 (Portugal)
| |
Collapse
|
15
|
Farnesi BC, Ball GDC, Newton AS. Family-health professional relations in pediatric weight management: an integrative review. Pediatr Obes 2012; 7:175-86. [PMID: 22492659 DOI: 10.1111/j.2047-6310.2012.00029.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Revised: 11/14/2011] [Accepted: 12/09/2011] [Indexed: 11/30/2022]
Abstract
In this integrative review, we examined contemporary literature in pediatric weight management to identify characteristics that contribute to the relationship between families and health professionals and describe how these qualities can inform healthcare practices for obese children and families receiving weight management care. We searched literature published from 1980 to 2010 in three electronic databases (MEDLINE, PsycINFO and CINAHL). Twenty-four articles identified family-health professional relationships were influenced by the following: health professionals' weight-related discussions and approaches to care; and parents' preferences regarding weight-related terminology and expectations of healthcare delivery. There was considerable methodological heterogeneity in the types of reports (i.e. qualitative studies, review articles, commentaries) included in this review. Overall, the findings have implications for establishing a positive clinical relationship between families and health professionals, which include being sensitive when discussing weight-related issues, using euphemisms when talking about obesity, demonstrating a non-judgmental and supportive attitude and including the family (children and parents) in healthcare interactions. Experimental research, clinical interventions and longitudinal studies are needed to build on the current evidence to determine how best to establish a collaborative partnership between families and health professionals and whether such a partnership improves treatment adherence, reduces intervention attrition and enhances pediatric weight management success.
Collapse
Affiliation(s)
- B C Farnesi
- Department of Pediatrics, University of Alberta, Edmonton, AB, Canada
| | | | | |
Collapse
|
16
|
Newton AS, Desser KB, Benchimol A. Recent developments in the diagnosis and treatment of myocarditis. Ariz Med 1985; 42:361-3. [PMID: 4026601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
17
|
Newton AS. Underwater vision. J Am Optom Assoc 1967; 38:378-80. [PMID: 6046944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|