1
|
Paulowski L, Beckham KSH, Johansen MD, Berneking L, Van N, Degefu Y, Staack S, Sotomayor FV, Asar L, Rohde H, Aldridge BB, Aepfelbacher M, Parret A, Wilmanns M, Kremer L, Combrink K, Maurer FP. C25-modified rifamycin derivatives with improved activity against Mycobacterium abscessus. PNAS Nexus 2022; 1:pgac130. [PMID: 36714853 PMCID: PMC9802118 DOI: 10.1093/pnasnexus/pgac130] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 08/05/2022] [Indexed: 02/01/2023]
Abstract
Infections caused by Mycobacterium abscessus are difficult to treat due to its intrinsic resistance to most antibiotics. Formation of biofilms and the capacity of M. abscessus to survive inside host phagocytes further complicate eradication. Herein, we explored whether addition of a carbamate-linked group at the C25 position of rifamycin SV blocks enzymatic inactivation by ArrMab, an ADP-ribosyltransferase conferring resistance to rifampicin (RMP). Unlike RMP, 5j, a benzyl piperidine rifamycin derivative with a morpholino substituted C3 position and a naphthoquinone core, is not modified by purified ArrMab. Additionally, we show that the ArrMab D82 residue is essential for catalytic activity. Thermal profiling of ArrMab in the presence of 5j, RMP, or rifabutin shows that 5j does not bind to ArrMab. We found that the activity of 5j is comparable to amikacin against M. abscessus planktonic cultures and pellicles. Critically, 5j also exerts potent antimicrobial activity against M. abscessus in human macrophages and shows synergistic activity with amikacin and azithromycin.
Collapse
Affiliation(s)
| | | | | | | | - Nhi Van
- Department of Molecular Biology and Microbiology, Tufts University School of Medicine and Stuart B. Levy Center for Integrated Management of Antimicrobial Resistance, Boston, MA 02111, USA
| | - Yonatan Degefu
- Department of Molecular Biology and Microbiology, Tufts University School of Medicine and Stuart B. Levy Center for Integrated Management of Antimicrobial Resistance, Boston, MA 02111, USA
| | - Sonja Staack
- European Molecular Biology Laboratory, 22607 Hamburg, Germany
| | - Flor Vasquez Sotomayor
- National and WHO Supranational Reference Center for Mycobacteria, Research Center Borstel, Leibniz Lung Center, 23845 Borstel, Germany,Institute of Medical Microbiology, Virology and Hygiene, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Lucia Asar
- Institute of Medical Microbiology, Virology and Hygiene, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Holger Rohde
- Institute of Medical Microbiology, Virology and Hygiene, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Bree B Aldridge
- Department of Molecular Biology and Microbiology, Tufts University School of Medicine and Stuart B. Levy Center for Integrated Management of Antimicrobial Resistance, Boston, MA 02111, USA
| | - Martin Aepfelbacher
- Institute of Medical Microbiology, Virology and Hygiene, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Annabel Parret
- European Molecular Biology Laboratory, 22607 Hamburg, Germany,Charles River Laboratories, 2340 Beerse, Belgium
| | - Matthias Wilmanns
- European Molecular Biology Laboratory, 22607 Hamburg, Germany,University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Laurent Kremer
- Centre National de la Recherche Scientifique UMR 9004, Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, 34293 Montpellier, France,INSERM, Institut de Recherche en Infectiologie de Montpellier, 34293 Montpellier, France
| | - Keith Combrink
- Department of Chemistry and Biochemistry, Texas A&M International University, Laredo, TX 77843, USA,Department of Chemistry, Blinn College, Bryan Campus, Brenham, TX 77833, USA
| | | |
Collapse
|
2
|
Affiliation(s)
- Deepak Ganta
- School of Engineering, Texas A&M International University, Laredo, Texas, USA
| | - Carlos Guzman
- School of Engineering, Texas A&M International University, Laredo, Texas, USA
| | | | - Mario Fuentes
- School of Engineering, Texas A&M International University, Laredo, Texas, USA
| |
Collapse
|
3
|
Mac Sweeney A, Grosche P, Ellis D, Combrink K, Erbel P, Hughes N, Sirockin F, Melkko S, Bernardi A, Ramage P, Jarousse N, Altmann E. Discovery and structure-based optimization of adenain inhibitors. ACS Med Chem Lett 2014; 5:937-41. [PMID: 25147618 DOI: 10.1021/ml500224t] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [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: 05/28/2014] [Accepted: 06/20/2014] [Indexed: 02/07/2023] Open
Abstract
The cysteine protease adenain is the essential protease of adenovirus and, as such, represents a promising target for the treatment of ocular and other adenoviral infections. Through a concise two-pronged hit discovery approach we identified tetrapeptide nitrile 1 and pyrimidine nitrile 2 as complementary starting points for adenain inhibition. These hits enabled the first high-resolution X-ray cocrystal structures of adenain with inhibitors bound and revealed the binding mode of 1 and 2. The screening hits were optimized by a structure-guided medicinal chemistry strategy into low nanomolar drug-like inhibitors of adenain.
Collapse
Affiliation(s)
- Aengus Mac Sweeney
- Novartis Institute for Biomedical Research, Novartis Campus, CH-4002 Basel, Switzerland
| | - Philipp Grosche
- Novartis Institute for Biomedical Research, Novartis Campus, CH-4002 Basel, Switzerland
| | - David Ellis
- Novartis Institute for Biomedical Research, 6201 South Freeway, Fort Worth, Texas 76134-2099, United States
| | - Keith Combrink
- Novartis Institute for Biomedical Research, 6201 South Freeway, Fort Worth, Texas 76134-2099, United States
| | - Paul Erbel
- Novartis Institute for Biomedical Research, Novartis Campus, CH-4002 Basel, Switzerland
| | - Nicola Hughes
- Novartis Institute for Biomedical Research, Novartis Campus, CH-4002 Basel, Switzerland
| | - Finton Sirockin
- Novartis Institute for Biomedical Research, Novartis Campus, CH-4002 Basel, Switzerland
| | - Samu Melkko
- Novartis Institute for Biomedical Research, Novartis Campus, CH-4002 Basel, Switzerland
| | - Anna Bernardi
- Novartis Institute for Biomedical Research, Novartis Campus, CH-4002 Basel, Switzerland
| | - Paul Ramage
- Novartis Institute for Biomedical Research, Novartis Campus, CH-4002 Basel, Switzerland
| | - Nadine Jarousse
- Novartis Institute for Biomedical Research, 4560 Horton Street, Emeryville, California 94608-2916, United States
| | - Eva Altmann
- Novartis Institute for Biomedical Research, Novartis Campus, CH-4002 Basel, Switzerland
| |
Collapse
|
4
|
Ramachandran C, Patil R, Combrink K, Sharif N, Srinivas S. Rho-Rho kinase pathway in the actomyosin contraction and cell-matrix adhesion in immortalized human trabecular meshwork cells. Mol Vis 2011; 17:1877-90. [PMID: 21850162 PMCID: PMC3144732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Accepted: 07/05/2011] [Indexed: 10/25/2022] Open
Abstract
PURPOSE The outflow facility for aqueous humor across the trabecular meshwork (TM) is enhanced by agents that oppose the actomyosin contraction of its resident cells. Phosphorylation of MYPT1 (myosin light chain [MLC] phosphatase complex of Type 1) at Thr853 and Thr696 inhibits dephosphorylation of MLC, leading to an increase in actomyosin contraction. In this study, we examined the effects of Rho kinase (ROCK) inhibitors on the relative dephosphorylation of the two sites of MYPT1 using human TM cells (GTM3). METHODS Dephosphorylation of MYPT1 at Thr853 and Thr696 was determined by western blot analysis following exposure to selective inhibitors of ROCK, namely Y-27632 and Y-39983. Consequent dephosphorylation of MLC and decreases in actomyosin contraction were assessed by western blot analysis and collagen gel contraction assay, respectively. Changes in the cell-matrix adhesion were measured in real time by electric cell-substrate impedance sensing and also assessed by staining for paxillin, vinculin, and focal adhesion kinase (FAK). RESULTS Both ROCK inhibitors produced a concentration-dependent dephosphorylation at Thr853 and Thr696 of MYPT1 in adherent GTM3 cells. IC₅₀ values for Y-39983 were 15 nM and 177 nM for dephosphorylation at Thr853 and Thr696, respectively. Corresponding values for Y-27632 were 658 nM and 2270 nM. Analysis of the same samples showed a decrease in MLC phosphorylation with IC₅₀ values of 14 nM and 1065 nM for Y-39983 and Y-27632, respectively. Consistent with these changes, both inhibitors opposed contraction of collagen gels induced by TM cells. Exposure of cells to the inhibitors led to a decrease in the electrical cell-substrate resistance, with the effect of Y-39983 being more pronounced than Y-27632. Treatment with these ROCK inhibitors also showed a loss of stress fibers and a concomitant decrease in tyrosine phosphorylation of paxillin and FAK. CONCLUSIONS Y-39983 and Y-27632 oppose ROCK-dependent phosphorylation of MYPT1 predominantly at Thr853 with a corresponding decrease in MLC phosphorylation. A relatively low effect of both ROCK inhibitors at Thr696 suggests a role for other Ser/Thr kinases at this site. Y-39983 was several-fold more potent when compared with Y-27632 at inhibiting the phosphorylation of MYPT1 at either Thr853 or Thr696 commensurate with its greater potency at inhibiting the activity of human ROCK-I and ROCK-II enzymes.
Collapse
Affiliation(s)
| | - R.V. Patil
- Pharmaceutical Research, Alcon Research Ltd., Fort Worth, TX
| | - K. Combrink
- Pharmaceutical Research, Alcon Research Ltd., Fort Worth, TX
| | - N.A. Sharif
- Pharmaceutical Research, Alcon Research Ltd., Fort Worth, TX
| | - S.P. Srinivas
- School of Optometry, Indiana University, Bloomington, IN
| |
Collapse
|
5
|
Cianci C, Genovesi EV, Lamb L, Medina I, Yang Z, Zadjura L, Yang H, D'Arienzo C, Sin N, Yu KL, Combrink K, Li Z, Colonno R, Meanwell N, Clark J, Krystal M. Oral efficacy of a respiratory syncytial virus inhibitor in rodent models of infection. Antimicrob Agents Chemother 2004; 48:2448-54. [PMID: 15215093 PMCID: PMC434195 DOI: 10.1128/aac.48.7.2448-2454.2004] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
BMS-433771 is a potent inhibitor of respiratory syncytial virus (RSV) replication in vitro. Mechanism of action studies have demonstrated that BMS-433771 halts virus entry through inhibition of F protein-mediated membrane fusion. BMS-433771 also exhibited in vivo efficacy following oral administration in a mouse model of RSV infection (C. Cianci, K. Y. Yu, K. Combrink, N. Sin, B. Pearce, A. Wang, R. Civiello, S. Voss, G. Luo, K. Kadow, E. Genovesi, B. Venables, H. Gulgeze, A. Trehan, J. James, L. Lamb, I. Medina, J. Roach, Z. Yang, L. Zadjura, R. Colonno, J. Clark, N. Meanwell, and M. Krystal, Antimicrob. Agents Chemother. 48:413-422, 2004). In this report, the in vivo efficacy of BMS-433771 against RSV was further examined in the BALB/c mouse and cotton rat host models of infection. By using the Long strain of RSV, prophylactic efficacy via oral dosing was observed in both animal models. A single oral dose, administered 1 h prior to intranasal RSV inoculation, was as effective against infection as a 4-day b.i.d. dosing regimen in which the first oral dose was given 1 h prior to virus inoculation. Results of dose titration experiments suggested that RSV infection was more sensitive to inhibition by BMS-433771 treatment in the BALB/c mouse host than in the cotton rat. This was reflected by the pharmacokinetic and pharmacodynamic analysis of the efficacy data, where the area under the concentration-time curve required to achieve 50% of the maximum response was approximately 7.5-fold less for mice than for cotton rats. Inhibition of RSV by BMS-433771 in the mouse is the result of F1-mediated inhibition, as shown by the fact that a virus selected for resistance to BMS-433771 in vitro and containing a single amino acid change in the F1 region was also refractory to treatment in the mouse host. BMS-433771 efficacy against RSV infection was also demonstrated for mice that were chemically immunosuppressed by cyclophosphamide treatment, indicating that compound inhibition of the virus did not require an active host immune response.
Collapse
Affiliation(s)
- Christopher Cianci
- The Bristol-Myers Squibb Pharmaceutical Research Institute, 5 Research Parkway, Wallingford, CT 06492, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Cianci C, Yu KL, Combrink K, Sin N, Pearce B, Wang A, Civiello R, Voss S, Luo G, Kadow K, Genovesi EV, Venables B, Gulgeze H, Trehan A, James J, Lamb L, Medina I, Roach J, Yang Z, Zadjura L, Colonno R, Clark J, Meanwell N, Krystal M. Orally active fusion inhibitor of respiratory syncytial virus. Antimicrob Agents Chemother 2004; 48:413-22. [PMID: 14742189 PMCID: PMC321540 DOI: 10.1128/aac.48.2.413-422.2004] [Citation(s) in RCA: 108] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2003] [Revised: 10/09/2003] [Accepted: 11/04/2003] [Indexed: 12/28/2022] Open
Abstract
BMS-433771 was found to be a potent inhibitor of respiratory syncytial virus (RSV) replication in vitro. It exhibited excellent potency against multiple laboratory and clinical isolates of both group A and B viruses, with an average 50% effective concentration of 20 nM. Mechanism-of-action studies demonstrated that BMS-433771 inhibits the fusion of lipid membranes during both the early virus entry stage and late-stage syncytium formation. After isolation of resistant viruses, resistance was mapped to a series of single amino acid mutations in the F1 subunit of the fusion protein. Upon oral administration, BMS-433771 was able to reduce viral titers in the lungs of mice infected with RSV. This new class of orally active RSV fusion inhibitors offers potential for clinical development.
Collapse
Affiliation(s)
- Christopher Cianci
- The Bristol-Myers Squibb Pharmaceutical Research Institute, Wallingford, Connecticut 06492, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Combrink K. Non-HIV antivirals - a review of the recent patent literature. IDrugs 2002; 5:815-27. [PMID: 12802698] [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] [Indexed: 03/03/2023]
Abstract
This review covers the non-HIV antiviral patent literature from December 2001 to April 2002. Most of the patent applications describe new compounds for the treatment of hepatitis C virus (HCV) by inhibition of the NS3 serine protease. Several examples of both nucleoside and non-nucleoside inhibitors of the HCV polymerase NS5B have been reported. Hepatitis B virus (HBV) therapy continues to be dominated by nucleoside analogs, but several non-nucleoside HBV polymerase inhibitors have also been reported. In addition, a number of patents describing non-nucleoside inhibitors of the human cytomegalovirus (HCMV), the herpes simplex virus (HSV-1 and HSV-2) and the varicella zoster virus (VZV) DNA polymerase are also reviewed. A number of patents that appeared in 2002 hold promise for the treatment of respiratory syncytial virus (RSV) with small molecule inhibitors. Various approaches to the treatment of hepatitis D virus (HDV), picornaviruses and the human papilloma virus (HPV) are also described.
Collapse
Affiliation(s)
- Keith Combrink
- Cumbre Inc, 1502 Viceroy Drive, Dallas, TX 75235-2304, USA.
| |
Collapse
|
8
|
Paquette LA, Zhao M, Montgomery F, Zeng Q, Wang TZ, Elmore S, Combrink K, Wang HL, Bailey S, Su Z. From D-camphor to the taxanes. Highly concise rearrangement-based approaches to taxusin and taxol. PURE APPL CHEM 1998. [DOI: 10.1351/pac199870081449] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|