1
|
Zou YS, Klausner M, Ghabrial J, Stinnett V, Long P, Morsberger L, Murry JB, Beierl K, Gocke CD, Xian RR, Toomer KH, Ye JC, Orlowski RZ, Huff CA, Ali SA, Imus PH, Gocke CB, Tang G. A comprehensive approach to evaluate genetic abnormalities in multiple myeloma using optical genome mapping. Blood Cancer J 2024; 14:78. [PMID: 38702349 PMCID: PMC11068911 DOI: 10.1038/s41408-024-01059-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 04/15/2024] [Accepted: 04/17/2024] [Indexed: 05/06/2024] Open
Affiliation(s)
- Ying S Zou
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| | - Melanie Klausner
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jen Ghabrial
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Victoria Stinnett
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Patty Long
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Laura Morsberger
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jaclyn B Murry
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Katie Beierl
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Christopher D Gocke
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Rena R Xian
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Kevin H Toomer
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jing Christine Ye
- Department of Lymphoma & Myeloma, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX, 77030, USA
| | - Robert Z Orlowski
- Department of Lymphoma & Myeloma, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX, 77030, USA
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX, 77030, USA
| | - Carol Ann Huff
- Department of Oncology, The Sydney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Syed Abbas Ali
- Department of Oncology, The Sydney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Philip H Imus
- Department of Oncology, The Sydney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Christian B Gocke
- Department of Oncology, The Sydney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Guilin Tang
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, 6565 MD Anderson Blvd, Houston, TX, 77030, USA
| |
Collapse
|
2
|
Sharma AK, Gupta K, Mishra A, Lofland G, Marsh I, Kumar D, Ghiaur G, Imus P, Rowe SP, Hobbs RF, Gocke CB, Nimmagadda S. CD38-Specific Gallium-68 Labeled Peptide Radiotracer Enables Pharmacodynamic Monitoring in Multiple Myeloma with PET. Adv Sci (Weinh) 2024; 11:e2308617. [PMID: 38421139 PMCID: PMC11040352 DOI: 10.1002/advs.202308617] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 01/09/2024] [Indexed: 03/02/2024]
Abstract
The limited availability of molecularly targeted low-molecular-weight imaging agents for monitoring multiple myeloma (MM)-targeted therapies has been a significant challenge in the field. In response, a first-in-class peptide-based radiotracer, [68Ga]Ga-AJ206, is developed that can be seamlessly integrated into the standard clinical workflow and is specifically designed to noninvasively quantify CD38 levels and pharmacodynamics by positron emission tomography (PET). A bicyclic peptide, AJ206, is synthesized and exhibits high affinity to CD38 (KD: 19.1 ± 0.99 × 10-9 m) by surface plasmon resonance. Further, [68Ga]Ga-AJ206-PET shows high contrast within 60 min and suitable absorbed dose estimates for clinical use. Additionally, [68Ga]Ga-AJ206 detects CD38 expression in cell line-derived xenografts, patient-derived xenografts (PDXs), and disseminated disease models in a manner consistent with flow cytometry and immunohistochemistry findings. Moreover, [68Ga]Ga-AJ206-PET successfully quantifies CD38 pharmacodynamics in PDXs, revealing increased CD38 expression in the tumor following all-trans retinoic acid (ATRA) therapy. In conclusion, [68Ga]Ga-AJ206 exhibits the salient features required for clinical translation, providing CD38-specific high-contrast images in multiple models of MM. [68Ga]Ga-AJ206-PET could be useful for quantifying total CD38 levels and pharmacodynamics during therapy to evaluate approved and new therapies in MM and other diseases with CD38 involvement.
Collapse
Affiliation(s)
- Ajay Kumar Sharma
- The Russell H. Morgan Department of Radiology and Radiological ScienceJohns Hopkins University School of MedicineBaltimoreMD21287USA
| | - Kuldeep Gupta
- The Russell H. Morgan Department of Radiology and Radiological ScienceJohns Hopkins University School of MedicineBaltimoreMD21287USA
| | - Akhilesh Mishra
- The Russell H. Morgan Department of Radiology and Radiological ScienceJohns Hopkins University School of MedicineBaltimoreMD21287USA
- Chemical & Biomolecular EngineeringWhiting School of EngineeringJohns Hopkins UniversityBaltimoreMD21218USA
| | - Gabriela Lofland
- The Russell H. Morgan Department of Radiology and Radiological ScienceJohns Hopkins University School of MedicineBaltimoreMD21287USA
| | - Ian Marsh
- Department of Radiation Oncology and Molecular SciencesJohns Hopkins University School of MedicineBaltimoreMD21287USA
| | - Dhiraj Kumar
- The Russell H. Morgan Department of Radiology and Radiological ScienceJohns Hopkins University School of MedicineBaltimoreMD21287USA
| | - Gabriel Ghiaur
- The Sidney Kimmel Comprehensive Cancer Center and the Bloomberg‐Kimmel Institute for Cancer ImmunotherapyJohns Hopkins University School of MedicineBaltimoreMD21287USA
| | - Philip Imus
- The Sidney Kimmel Comprehensive Cancer Center and the Bloomberg‐Kimmel Institute for Cancer ImmunotherapyJohns Hopkins University School of MedicineBaltimoreMD21287USA
| | - Steven P. Rowe
- The Russell H. Morgan Department of Radiology and Radiological ScienceJohns Hopkins University School of MedicineBaltimoreMD21287USA
| | - Robert F. Hobbs
- Department of Radiation Oncology and Molecular SciencesJohns Hopkins University School of MedicineBaltimoreMD21287USA
| | - Christian B. Gocke
- The Sidney Kimmel Comprehensive Cancer Center and the Bloomberg‐Kimmel Institute for Cancer ImmunotherapyJohns Hopkins University School of MedicineBaltimoreMD21287USA
| | - Sridhar Nimmagadda
- The Russell H. Morgan Department of Radiology and Radiological ScienceJohns Hopkins University School of MedicineBaltimoreMD21287USA
- The Sidney Kimmel Comprehensive Cancer Center and the Bloomberg‐Kimmel Institute for Cancer ImmunotherapyJohns Hopkins University School of MedicineBaltimoreMD21287USA
- Department of Pharmacology and Molecular SciencesJohns Hopkins University School of MedicineBaltimoreMD21287USA
- Division of Clinical PharmacologyDepartment of MedicineJohns Hopkins University School of MedicineBaltimoreMD21287USA
| |
Collapse
|
3
|
Sharma AK, Gupta K, Mishra A, Lofland G, Marsh I, Kumar D, Ghiaur G, Imus P, Hobbs RF, Gocke CB, Nimmagadda S. A Gallium-68-Labeled Peptide Radiotracer For CD38-Targeted Imaging In Multiple Myeloma With PET. bioRxiv 2023:2023.05.09.540036. [PMID: 37214794 PMCID: PMC10197667 DOI: 10.1101/2023.05.09.540036] [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: 05/24/2023]
Abstract
PURPOSE The limited availability of molecularly targeted low-molecular-weight imaging agents for monitoring multiple myeloma (MM)-targeted therapies has been a significant challenge in the field. In response, we developed [68Ga]Ga-AJ206, a peptide-based radiotracer that can be seamlessly integrated into the standard clinical workflow and is specifically designed to non-invasively quantify CD38 levels and pharmacodynamics by positron emission tomography (PET). EXPERIMENTAL DESIGN We synthesized a high-affinity binder for quantification of CD38 levels. Affinity was tested using surface plasmon resonance, and In vitro specificity was evaluated using a gallium-68-labeled analog. Distribution, pharmacokinetics, and CD38 specificity of the radiotracer were assessed in MM cell lines and in primary patient-derived myeloma cells and xenografts (PDX) with cross-validation by flow cytometry and immunohistochemistry. Furthermore, we investigated the radiotracer's potential to quantify CD38 pharmacodynamics induced by all-trans retinoic acid therapy (ATRA). RESULTS [68Ga]Ga-AJ206 exhibited high CD38 binding specificity (KD: 19.1±0.99 nM) and CD38-dependent In vitro binding. [68Ga]Ga-AJ206-PET showed high contrast within 60 minutes and suitable absorbed dose estimates for clinical use. Additionally, [68Ga]Ga-AJ206 detected CD38 expression in xenografts, PDXs and disseminated disease models in a manner consistent with flow cytometry and immunohistochemistry findings. Moreover, [68Ga]Ga-AJ206-PET successfully quantified CD38 pharmacodynamics in PDXs, revealing increased CD38 expression in the tumor following ATRA therapy. CONCLUSIONS [68Ga]Ga-AJ206 exhibited the salient features required for clinical translation, providing CD38-specific high contrast images in multiple models of MM. [68Ga]Ga-AJ206-PET could be useful for quantifying total CD38 levels and pharmacodynamics during therapy to evaluate approved and new therapies in MM and other diseases with CD38 involvement.
Collapse
|
4
|
Sterling CH, Hughes MS, Tsai HL, Yarkony K, Fuchs EJ, Swinnen LJ, Paul S, Bolaños-Meade J, Luznik L, Imus PH, Ali SA, Jain T, Ambinder A, DeZern A, Huff CA, Gocke CB, Varadhan R, Wagner-Johnston N, Jones RJ, Ambinder RF. Allogeneic Blood or Marrow Transplantation with Post-Transplantation Cyclophosphamide for Peripheral T Cell Lymphoma: The Importance of Graft Source. Transplant Cell Ther 2023; 29:267.e1-267.e5. [PMID: 36549386 PMCID: PMC10040425 DOI: 10.1016/j.jtct.2022.12.009] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 12/09/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
The use of post-transplantation cyclophosphamide (PTCy) for graft-versus host-disease (GVHD) prophylaxis has revolutionized allogeneic blood or marrow transplantation (alloBMT), but there is limited published experience in peripheral T cell lymphoma (PTCL). We sought to assess outcomes in patients with PTCL who underwent alloBMT with PTCy. We reviewed the charts of all adult patients age ≥18 years who underwent alloBMT with nonmyeloablative conditioning and PTCy-based GVHD prophylaxis at the Sidney Kimmel Comprehensive Cancer Center between January 2004 and December 2020. Sixty-five patients were identified. The median age was 59 years (range, 24 to 75 years). Lymphoma histology included PTCL not otherwise specified (n = 24), anaplastic lymphoma kinase-negative anaplastic large cell lymphoma (n = 14), angioimmunoblastic T cell lymphoma (n = 7), enteropathy-associated T cell lymphoma (n = 6), hepatosplenic T cell lymphoma (n = 4), and others (n = 10). Eleven patients were in first complete remission (17%); the remaining patients were in first partial remission or underwent salvage therapy to at least PR prior to transplantation. Forty-eight patients underwent alloBMT from a haploidentical related donor (74%), 10 from a fully matched donor (15%), and 7 from a mismatched unrelated donor (11%). All patients received fludarabine, cyclophosphamide, and total body irradiation (TBI). The graft source was bone marrow (BM) in 46 patients (71%) and peripheral blood (PB) in 19 patients (29%); all patients in the BM cohort received 200 cGy TBI, and most patients in the PB cohort (15 of 19) received 400 cGy TBI. GVHD prophylaxis comprised PTCy, mycophenolate mofetil, and a calcineurin inhibitor or sirolimus. With a median follow-up of 2.8 years (range, 290 days to 14.2 years), the 2-year progression-free survival (PFS) for the entire cohort was 49% (95% confidence interval [CI], 38% to 64%), and the 2-year overall survival (OS) was 55% (95% CI, 44% to 69%). Outcomes were significantly improved in those receiving PB compared to those receiving BM, including a 2-year PFS of 79% (95% CI 63% to 100%) versus 39% (95% CI, 27% to 56%), 2-year OS of 84% (95% CI, 69% to 100%) versus 46% (95% CI, 33% to 63%), and 1-year cumulative incidence of relapse of 5% (95% CI, 0 to 16%) versus 33% (95% CI, 19% to 46%), with no difference in GVHD and nonrelapse mortality. AlloBMT with PTCy is safe and well-tolerated in patients with PTCL. Our data suggest that increasing the TBI dose to 400 cGy and using PB allografts may offer improved disease control and better survival outcomes, though additional studies are needed to confirm these findings.
Collapse
Affiliation(s)
- Cole H Sterling
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.
| | - Michael S Hughes
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Hua-Ling Tsai
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Kathryn Yarkony
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ephraim J Fuchs
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Lode J Swinnen
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Suman Paul
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Javier Bolaños-Meade
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Leo Luznik
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Philip H Imus
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Syed Abbas Ali
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Tania Jain
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Alexander Ambinder
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Amy DeZern
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Carol Ann Huff
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Christian B Gocke
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ravi Varadhan
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Nina Wagner-Johnston
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Richard J Jones
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Richard F Ambinder
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| |
Collapse
|
5
|
Webster JA, Reed M, Tsai HL, Ambinder A, Jain T, Dezern AE, Levis MJ, Showel MM, Prince GT, Hourigan CS, Gladstone DE, Bolanos-Meade J, Gondek LP, Ghiaur G, Dalton WB, Paul S, Fuchs EJ, Gocke CB, Ali SA, Huff CA, Borrello IM, Swinnen L, Wagner-Johnston N, Ambinder RF, Luznik L, Gojo I, Smith BD, Varadhan R, Jones RJ, Imus PH. Allogeneic Blood or Marrow Transplantation with High-Dose Post-Transplantation Cyclophosphamide for Acute Lymphoblastic Leukemia in Patients Age ≥55 Years. Transplant Cell Ther 2023; 29:182.e1-182.e8. [PMID: 36587740 PMCID: PMC9992271 DOI: 10.1016/j.jtct.2022.12.018] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 12/16/2022] [Accepted: 12/21/2022] [Indexed: 12/31/2022]
Abstract
Patients age ≥55 years with acute lymphoblastic leukemia (ALL) fare poorly with conventional chemotherapy, with a 5-year overall survival (OS) of ∼20%. Tyrosine kinase inhibitors and novel B cell-targeted therapies can improve outcomes, but rates of relapse and death in remission remain high. Allogeneic blood or marrow transplantation (alloBMT) provides an alternative consolidation strategy, and post-transplantation cyclophosphamide (PTCy) facilitates HLA-mismatched transplantations with low rates of nonrelapse mortality (NRM) and graft-versus-host disease (GVHD). The transplantation database at Johns Hopkins was queried for patients age ≥55 years who underwent alloBMT for ALL using PTCy. The database included 77 such patients. Most received reduced-intensity conditioning (RIC) (88.3%), were in first complete remission (CR1) (85.7%), and had B-lineage disease (90.9%). For the entire cohort, 5-year relapse-free survival (RFS) and overall survival (OS) were 46% (95% confidence interval [CI], 34% to 57%) and 49% (95% CI, 37% to 60%), respectively. Grade III-IV acute GVHD occurred in only 3% of patients, and chronic GVHD occurred in 13%. In multivariable analysis, myeloablative conditioning led to worse RFS (hazard ratio [HR], 4.65; P = .001), whereas transplantation in CR1 (HR, .30; P = .004) and transplantation for Philadelphia chromosome-positive (Ph+) ALL versus T-ALL (HR, .29; P = .03) were associated with improved RFS. Of the 54 patients who underwent RIC alloBMT in CR1 for B-ALL, the 5-year RFS and OS were 62% (95% CI, 47% to 74%) and 65% (95% CI, 51% to 77%), respectively, with a 5-year relapse incidence of 16% (95% CI, 7% to 27%) and an NRM of 24% (95% CI, 13% to 36%). RIC alloBMT with PTCy in CR1 represents a promising consolidation strategy for B-ALL patients age ≥55 years.
Collapse
Affiliation(s)
- Jonathan A Webster
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland.
| | - Madison Reed
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Hua-Ling Tsai
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Alexander Ambinder
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Tania Jain
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Amy E Dezern
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Mark J Levis
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Margaret M Showel
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Gabrielle T Prince
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Christopher S Hourigan
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Douglas E Gladstone
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Javier Bolanos-Meade
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Lukasz P Gondek
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Gabriel Ghiaur
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - W Brian Dalton
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Suman Paul
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Ephraim J Fuchs
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Christian B Gocke
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Syed Abbas Ali
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Carol Ann Huff
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Ivan M Borrello
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Lode Swinnen
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Nina Wagner-Johnston
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Richard F Ambinder
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Leo Luznik
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Ivana Gojo
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - B Douglas Smith
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Ravi Varadhan
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Richard J Jones
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| | - Philip H Imus
- National Heart Lung and Blood Institute, University School of Medicine, Baltimore, Maryland
| |
Collapse
|
6
|
Hughes MS, Sterling CH, Varadhan R, Ambinder RF, Jones RJ, Sweren RJ, Rozati S, Bolaños-Meade J, Luznik L, Imus PH, Ali SA, Borrello IM, Huff CA, Jain T, Ambinder A, DeZern AE, Gocke CB, Gladstone DE, Swinnen LJ, Wagner-Johnston ND, Fuchs EJ. Mismatched donor transplantation with post-transplantation cyclophosphamide for advanced cutaneous T-cell lymphoma: a single-center retrospective study. Leuk Lymphoma 2022; 63:2987-2991. [PMID: 35915978 DOI: 10.1080/10428194.2022.2105330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Michael S Hughes
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Cole H Sterling
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ravi Varadhan
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Richard F Ambinder
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Richard J Jones
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ronald J Sweren
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Sima Rozati
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Javier Bolaños-Meade
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Leo Luznik
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Philip H Imus
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Syed Abbas Ali
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ivan M Borrello
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Carol Ann Huff
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Tania Jain
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Alexander Ambinder
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Amy E DeZern
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Christian B Gocke
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Douglas E Gladstone
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Lode J Swinnen
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Nina D Wagner-Johnston
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ephraim J Fuchs
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| |
Collapse
|
7
|
Biavati L, Huff CA, Ferguson A, Sidorski A, Stevens MA, Rudraraju L, Zucchinetti C, Ali SA, Imus P, Gocke CB, Gittelman RM, Johnson S, Sanders C, Vignali M, Gandhi A, Ye X, Noonan KA, Borrello I. An Allogeneic Multiple Myeloma GM-CSF-Secreting Vaccine with Lenalidomide Induces Long-term Immunity and Durable Clinical Responses in Patients in Near Complete Remission. Clin Cancer Res 2021; 27:6696-6708. [PMID: 34667029 DOI: 10.1158/1078-0432.ccr-21-1916] [Citation(s) in RCA: 7] [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] [Received: 05/25/2021] [Revised: 07/29/2021] [Accepted: 09/24/2021] [Indexed: 11/16/2022]
Abstract
PURPOSE This proof-of-principle clinical trial evaluated whether an allogeneic multiple myeloma GM-CSF-secreting vaccine (MM-GVAX) in combination with lenalidomide could deepen the clinical response in patients with multiple myeloma in sustained near complete remission (nCR). PATIENTS AND METHODS Fifteen patients on lenalidomide were treated with MM-GVAX and pneumococcal conjugate vaccine (PCV; Prevnar) at 1, 2, 3, and 6 months. RESULTS Eight patients (53.3%) achieved a true CR. With a median follow-up of 5 years, the median progression-free survival had not been reached, and the median overall survival was 7.8 years from enrollment. MM-GVAX induced clonal T-cell expansion and measurable cytokine responses that persisted up to 7 years in all patients. At baseline, a higher minimal residual disease was predictive of early relapse. After vaccination, a lack of both CD27-DNAM1-CD8+ T cells and antigen-presenting cells was associated with disease progression. CONCLUSIONS MM-GVAX, along with lenalidomide, effectively primed durable immunity and resulted in long-term disease control, as suggested by the reappearance of a detectable, fluctuating M-spike without meeting the criteria for clinical relapse. For patients in a nCR, MM-GVAX administration was safe and resulted in prolonged clinical responses.
Collapse
Affiliation(s)
- Luca Biavati
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland
| | - Carol Ann Huff
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland
| | - Anna Ferguson
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland
| | - Amy Sidorski
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland
| | - M Amanda Stevens
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland
| | - Lakshmi Rudraraju
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland
| | - Cristina Zucchinetti
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland
| | - Syed Abbas Ali
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland
| | - Philip Imus
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland
| | - Christian B Gocke
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland
| | | | | | | | | | | | - Xiaobu Ye
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland
| | - Kimberly A Noonan
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland
| | - Ivan Borrello
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland.
| |
Collapse
|
8
|
Sterling CH, Tsai HL, Holdhoff M, Bolaños-Meade J, Luznik L, Fuchs EJ, Huff CA, Gocke CB, Ali SA, Borrello IM, Varadhan R, Jones RJ, Gladstone DE, Ambinder RF, Wagner-Johnston N, Swinnen LJ, Imus PH. Allogeneic Blood or Marrow Transplantation with Nonmyeloablative Conditioning and High-Dose Cyclophosphamide-Based Graft-versus-Host Disease Prophylaxis for Secondary Central Nervous System Lymphoma. Transplant Cell Ther 2021; 27:863.e1-863.e5. [PMID: 34293518 DOI: 10.1016/j.jtct.2021.07.015] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 07/13/2021] [Accepted: 07/13/2021] [Indexed: 10/20/2022]
Abstract
Secondary central nervous system (CNS) lymphoma is a rare and often fatal complication of non-Hodgkin lymphoma (NHL). Treatment options include radiation therapy, high-dose systemic chemotherapy, intrathecal chemotherapy, and high-dose chemotherapy with autologous stem cell rescue, but outcomes remain poor. Allogeneic blood or marrow transplantation (alloBMT) is widely used in patients with relapsed/refractory systemic NHL. We sought to understand whether a graft-versus-lymphoma effect could maintain remission in CNS disease. We reviewed outcomes in 20 consecutive patients with secondary CNS lymphoma who underwent alloBMT with nonmyeloablative conditioning using fludarabine, cyclophosphamide, and 200 cGy total body irradiation. For graft-versus-host disease prophylaxis, all patients received post-transplantation cyclophosphamide, mycophenolate mofetil, and a calcineurin inhibitor. With a median follow up of 4.1 years, the median overall survival for the entire cohort was not reached. Median progression-free survival was 3.8 years (95% confidence interval [CI], 5.3 months to not reached). The cumulative incidence of relapse was 25% (95% CI, 5% to 45%), and nonrelapse mortality was 30% (95% CI, 5% to 54%) at 4 years. Of the 5 patients who relapsed, 2 were CNS only, 1 was systemic only, and 2 were combined CNS/systemic. The use of alloBMT in CNS lymphoma merits further investigation.
Collapse
Affiliation(s)
- Cole H Sterling
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.
| | - Hua-Ling Tsai
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Matthias Holdhoff
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Javier Bolaños-Meade
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Leo Luznik
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ephraim J Fuchs
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Carol Ann Huff
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Christian B Gocke
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Syed Abbas Ali
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ivan M Borrello
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ravi Varadhan
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Richard J Jones
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Douglas E Gladstone
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Richard F Ambinder
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Nina Wagner-Johnston
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Lode J Swinnen
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Philip H Imus
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| |
Collapse
|
9
|
Sidhom JW, Siddarthan IJ, Lai BS, Luo A, Hambley BC, Bynum J, Duffield AS, Streiff MB, Moliterno AR, Imus P, Gocke CB, Gondek LP, DeZern AE, Baras AS, Kickler T, Levis MJ, Shenderov E. Deep learning for diagnosis of acute promyelocytic leukemia via recognition of genomically imprinted morphologic features. NPJ Precis Oncol 2021; 5:38. [PMID: 33990660 PMCID: PMC8121867 DOI: 10.1038/s41698-021-00179-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 04/16/2021] [Indexed: 12/16/2022] Open
Abstract
Acute promyelocytic leukemia (APL) is a subtype of acute myeloid leukemia (AML), classified by a translocation between chromosomes 15 and 17 [t(15;17)], that is considered a true oncologic emergency though appropriate therapy is considered curative. Therapy is often initiated on clinical suspicion, informed by both clinical presentation as well as direct visualization of the peripheral smear. We hypothesized that genomic imprinting of morphologic features learned by deep learning pattern recognition would have greater discriminatory power and consistency compared to humans, thereby facilitating identification of t(15;17) positive APL. By applying both cell-level and patient-level classification linked to t(15;17) PML/RARA ground-truth, we demonstrate that deep learning is capable of distinguishing APL in both discovery and prospective independent cohort of patients. Furthermore, we extract learned information from the trained network to identify previously undescribed morphological features of APL. The deep learning method we describe herein potentially allows a rapid, explainable, and accurate physician-aid for diagnosing APL at the time of presentation in any resource-poor or -rich medical setting given the universally available peripheral smear.
Collapse
Affiliation(s)
- John-William Sidhom
- Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ingharan J Siddarthan
- Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Bo-Shiun Lai
- Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Adam Luo
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Bryan C Hambley
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jennifer Bynum
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Amy S Duffield
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Hematopathology Service, Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Michael B Streiff
- Division of Hematology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Alison R Moliterno
- Division of Hematology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Philip Imus
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Christian B Gocke
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Lukasz P Gondek
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Amy E DeZern
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Alexander S Baras
- Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Thomas Kickler
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Mark J Levis
- The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Eugene Shenderov
- Bloomberg Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, MD, USA. .,The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| |
Collapse
|
10
|
Imus PH, Tsai HL, DeZern AE, Jerde K, Swinnen LJ, Bolaños-Meade J, Luznik L, Fuchs EJ, Wagner-Johnston N, Huff CA, Gladstone DE, Ambinder RF, Gocke CB, Ali SA, Borrello IM, Varadhan R, Brodsky R, Jones RJ. Thrombotic Microangiopathy after Post-Transplantation Cyclophosphamide-Based Graft-versus-Host Disease Prophylaxis. Biol Blood Marrow Transplant 2020; 26:2306-2310. [PMID: 32961372 DOI: 10.1016/j.bbmt.2020.09.018] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/02/2020] [Accepted: 09/02/2020] [Indexed: 12/31/2022]
Abstract
Transplant-associated thrombotic microangiopathy (taTMA) is a systemic vascular illness associated with significant morbidity and mortality, resulting from a convergence of risk factors after allogeneic blood or marrow transplantation (alloBMT). The diagnosis of taTMA has been a challenge, but most criteria include an elevated lactate dehydrogenase (LDH), low haptoglobin, and schistocytes on peripheral blood smear. We performed a retrospective review of the 678 consecutive adults who received high-dose post-transplantation cyclophosphamide (PTCy)-based graft-versus-host disease (GVHD) prophylaxis between January 1, 2015, and August 31, 2018. In April 2016, we initiated a monitoring program of weekly LDH and haptoglobin measurements and blood smears when those 2 parameters were both abnormal on all of our adult patients undergoing alloBMT for hematologic malignancies. During the entire period, the 1-year cumulative incidence of taTMA was 1.4% (95% confidence interval, 0.5% to 2.3%). Eight patients were taking tacrolimus at the time of diagnosis, and 1 was not on any immunosuppression. Eight of 9 patients (89%) were hypertensive. Four patients had invasive infections at the time of diagnosis, 4 patients required renal replacement therapy, and 5 of 9 patients were neurologically impaired. Eculizumab was given to 6 patients (0.9%), of whom 2 died and 4 recovered with resolution of end-organ dysfunction. The paucity of events made the determination of risk factors difficult; however, the low incidence of taTMA in this cohort may be related to the limited use of myeloablative conditioning regimens, low incidence of severe GVHD, and use of PTCy. PTCy-based GVHD prophylaxis appears to be associated with a low incidence of severe taTMA.
Collapse
Affiliation(s)
- Philip H Imus
- Department of Oncology, Sidney Kimmel Cancer Center, Baltimore, Maryland.
| | - Hua-Ling Tsai
- Department of Oncology Biostatistics, Sidney Kimmel Cancer Center, Baltimore, Maryland
| | - Amy E DeZern
- Department of Oncology, Sidney Kimmel Cancer Center, Baltimore, Maryland
| | - Kevin Jerde
- Department of Oncology, Sidney Kimmel Cancer Center, Baltimore, Maryland
| | - Lode J Swinnen
- Department of Oncology, Sidney Kimmel Cancer Center, Baltimore, Maryland
| | | | - Leo Luznik
- Department of Oncology, Sidney Kimmel Cancer Center, Baltimore, Maryland
| | - Ephraim J Fuchs
- Department of Oncology, Sidney Kimmel Cancer Center, Baltimore, Maryland
| | | | - Carol Ann Huff
- Department of Oncology, Sidney Kimmel Cancer Center, Baltimore, Maryland
| | | | - Richard F Ambinder
- Department of Oncology, Sidney Kimmel Cancer Center, Baltimore, Maryland
| | - Christian B Gocke
- Department of Oncology, Sidney Kimmel Cancer Center, Baltimore, Maryland
| | - Syed Abbas Ali
- Department of Oncology, Sidney Kimmel Cancer Center, Baltimore, Maryland
| | - Ivan M Borrello
- Department of Oncology, Sidney Kimmel Cancer Center, Baltimore, Maryland
| | - Ravi Varadhan
- Department of Oncology Biostatistics, Sidney Kimmel Cancer Center, Baltimore, Maryland
| | - Robert Brodsky
- Division of Hematology, Department of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Richard J Jones
- Department of Oncology, Sidney Kimmel Cancer Center, Baltimore, Maryland
| |
Collapse
|
11
|
Imus PH, Blackford AL, Bettinotti M, Luznik L, Fuchs EJ, Huff CA, Gladstone DE, Ambinder RF, Borrello IM, Fuchs RJ, Swinnen LJ, Wagner-Johnston N, Gocke CB, Ali SA, Bolaños-Meade FJ, Jones RJ, Dezern AE. Severe Cytokine Release Syndrome after Haploidentical Peripheral Blood Stem Cell Transplantation. Biol Blood Marrow Transplant 2019; 25:2431-2437. [PMID: 31394272 DOI: 10.1016/j.bbmt.2019.07.027] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [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: 04/19/2019] [Revised: 07/17/2019] [Accepted: 07/25/2019] [Indexed: 12/22/2022]
Abstract
Inflammatory cytokines released by activated lymphocytes and innate cells in the context of cellular therapy can cause fever, vasodilatation, and end-organ damage, collectively known as cytokine release syndrome (CRS). CRS can occur after allogeneic blood or marrow transplantation, but is especially prevalent after HLA-haploidentical (haplo) peripheral blood transplantation (PBT). We reviewed charts of all patients who underwent haplo-PBT between October 1, 2013, and September 1, 2017 and graded CRS in these patients. A total of 146 consecutive patients who underwent related haplo-PBT were analyzed. CRS occurred in 130 patients (89%), with most cases of mild severity (grade 0 to 2). Severe CRS (grade 3 to 5) occurred in 25 patients (17%). In this group with severe CRS, 13 patients had encephalopathy, 12 required hemodialysis, and 11 were intubated. Death from the immediate complications of CRS occurred in 6 patients (24% of the severe CRS group and 4% of the entire haplo-PBT cohort). The cumulative probability of nonrelapse mortality (NRM) was 38% at 6 months for the patients with severe CRS and 8% (121 of 146) in patients without severe CRS. In conclusion, CRS occurs in nearly 90% of haplo-PBTs. Older haplo-PBT recipients (odds ratio [OR], 2.4; 95% confidence interval [CI], .83 to 6.75; P = .11) and those with a history of radiation therapy (OR, 3.85; 95% CI, 1.32 to 11.24; P = .01) are at increased risk of developing severe CRS. Although most recipients of haplo-PBT develop CRS, <20% experience severe complications. The development of severe CRS is associated with a significantly increased risk of NRM.
Collapse
Affiliation(s)
- Philip H Imus
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland.
| | - Amanda L Blackford
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| | - Maria Bettinotti
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| | - Leo Luznik
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| | - Ephraim J Fuchs
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| | - Carol Ann Huff
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| | - Douglas E Gladstone
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| | - Richard F Ambinder
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| | - Ivan M Borrello
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| | - Robert J Fuchs
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| | - Lode J Swinnen
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| | - Nina Wagner-Johnston
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| | - Christian B Gocke
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| | - Syed Abbas Ali
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| | - F Javier Bolaños-Meade
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| | - Richard J Jones
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| | - Amy E Dezern
- Department of Hematologic Malignancy, Johns Hopkins/Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland
| |
Collapse
|
12
|
Elmariah H, Kasamon YL, Zahurak M, Macfarlane KW, Tucker N, Rosner GL, Bolaños-Meade J, Fuchs EJ, Wagner-Johnston N, Swinnen LJ, Huff CA, Matsui WH, Gladstone DE, McCurdy SR, Borrello I, Gocke CB, Shanbhag S, Cooke KR, Ali SA, Brodsky RA, DeZern AE, Luznik L, Jones RJ, Ambinder RF. Haploidentical Bone Marrow Transplantation with Post-Transplant Cyclophosphamide Using Non-First-Degree Related Donors. Biol Blood Marrow Transplant 2018; 24:1099-1102. [PMID: 29452245 DOI: 10.1016/j.bbmt.2018.02.005] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [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: 01/20/2018] [Accepted: 02/08/2018] [Indexed: 10/18/2022]
Abstract
Outcomes of nonmyeloablative (NMA) haploidentical (haplo) blood or marrow transplant (BMT) with post-transplantation cyclophosphamide (PTCy) using non-first-degree relatives are unknown. We evaluated 33 consecutive adult patients (median age, 56 years) with hematologic malignancies who underwent NMA haplo T cell-replete BMT with PTCy at Johns Hopkins using second- or third-degree related donors. Donors consisted of 10 nieces (30%), 9 nephews (27%), 7 first cousins (21%), 5 grandchildren (15%), and 2 uncles (6%). Thirty-one patients (94%) reached full donor chimerism by day 60. The estimated cumulative incidence (CuI) of grades II to IV acute graft-versus-host disease (aGVHD) at day 180 was 24% (90% confidence interval [CI], 9% to 38%). Only 1 patient experienced grades III to IV aGVHD. At 1 year the CuI of chronic GVHD was 10% (90% CI, 0% to 21%). The CuI of nonrelapse mortality at 1 year was 5% (90% CI, 0% to 14%). At 1 year the probability of relapse was 31% (90% CI, 12% to 49%), progression-free survival 64% (90% CI, 48% to 86%), and overall survival 95% (90% CI, 87% to 100%). The 1-year probability of GVHD-free, relapse-free survival was 57% (90% CI, 41% to 79%). NMA haplo BMT with PTCy from non-first-degree relatives is an acceptably safe and effective alternative donor platform, with results similar to those seen with first-degree relatives.
Collapse
Affiliation(s)
- Hany Elmariah
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Yvette L Kasamon
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Marianna Zahurak
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Karen W Macfarlane
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Noah Tucker
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Gary L Rosner
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Javier Bolaños-Meade
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ephraim J Fuchs
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Nina Wagner-Johnston
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Lode J Swinnen
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Carol Ann Huff
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - William H Matsui
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Douglas E Gladstone
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Shannon R McCurdy
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ivan Borrello
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Christian B Gocke
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Satish Shanbhag
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Kenneth R Cooke
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Syed Abbas Ali
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Robert A Brodsky
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Amy E DeZern
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Leo Luznik
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Richard J Jones
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Richard F Ambinder
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, Maryland.
| |
Collapse
|
13
|
Alonso S, Hernandez D, Chang YT, Gocke CB, McCray M, Varadhan R, Matsui WH, Jones RJ, Ghiaur G. Hedgehog and retinoid signaling alters multiple myeloma microenvironment and generates bortezomib resistance. J Clin Invest 2016; 126:4460-4468. [PMID: 27775549 DOI: 10.1172/jci88152] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 09/15/2016] [Indexed: 01/08/2023] Open
Abstract
Interactions between multiple myeloma (MM) cells and the BM microenvironment play a critical role in bortezomib (BTZ) resistance. However, the mechanisms involved in these interactions are not completely understood. We previously showed that expression of CYP26 in BM stromal cells maintains a retinoic acid-low (RA-low) microenvironment that prevents the differentiation of normal and malignant hematopoietic cells. Since a low secretory B cell phenotype is associated with BTZ resistance in MM and retinoid signaling promotes plasma cell differentiation and Ig production, we investigated whether stromal expression of the cytochrome P450 monooxygenase CYP26 modulates BTZ sensitivity in the BM niche. CYP26-mediated inactivation of RA within the BM microenvironment prevented plasma cell differentiation and promoted a B cell-like, BTZ-resistant phenotype in human MM cells that were cocultured on BM stroma. Moreover, paracrine Hedgehog secretion by MM cells upregulated stromal CYP26 and further reinforced a protective microenvironment. These results suggest that crosstalk between Hedgehog and retinoid signaling modulates BTZ sensitivity in the BM niche. Targeting these pathological interactions holds promise for eliminating minimal residual disease in MM.
Collapse
|
14
|
Gocke CB, McMillan R, Wang Q, Begum A, Penchev VR, Ali SA, Borrello I, Huff CA, Matsui W. IQGAP1 Scaffold-MAP Kinase Interactions Enhance Multiple Myeloma Clonogenic Growth and Self-Renewal. Mol Cancer Ther 2016; 15:2733-2739. [PMID: 27573425 DOI: 10.1158/1535-7163.mct-16-0323] [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] [Received: 05/18/2016] [Accepted: 08/16/2016] [Indexed: 11/16/2022]
Abstract
Despite improved outcomes in newly diagnosed multiple myeloma, virtually all patients relapse and ultimately develop drug-resistant disease. Aberrant RAS/MAPK signaling is activated in the majority of relapsed/refractory multiple myeloma patients, but its biological consequences are not fully understood. Self-renewal, as defined by the long-term maintenance of clonogenic growth, is essential for disease relapse, and we examined the role of RAS/MAPK activation on multiple myeloma self-renewal by targeting IQ motif-containing GTPase-activating protein 1 (IQGAP1), an intracellular scaffold protein required for mutant RAS signaling. We found that loss of IQGAP1 expression decreased MAPK signaling, cell-cycle progression, and tumor colony formation. Similarly, a peptide mimicking the WW domain of IQGAP1 that interacts with ERK inhibited the clonogenic growth and self-renewal of multiple myeloma cell lines and primary clinical specimens in vitro as well as tumor-initiating cell frequency in immunodeficient mice. During multiple myeloma progression, self-renewal may be enhanced by aberrant RAS/MAPK signaling and inhibited by targeting IQGAP1. Mol Cancer Ther; 15(11); 2733-9. ©2016 AACR.
Collapse
Affiliation(s)
- Christian B Gocke
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ross McMillan
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Qiuju Wang
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Asma Begum
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Vesselin R Penchev
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Syed A Ali
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ivan Borrello
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Carol Ann Huff
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - William Matsui
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland.
| |
Collapse
|
15
|
Abstract
Covalent modification of proteins by small ubiquitin-like modifier (SUMO) regulates diverse cellular processes. While many SUMO substrates are identified through individual efforts, affinity-based approaches followed by mass spectrometry are also used to identify in vivo SUMO substrates in yeast and in mammals. Because of low steady-state levels of sumoylation and biases towards abundant targets, identifying sumoylated proteins in vivo can be challenging. The in vitro expression cloning (IVEC) method for SUMO target identification circumvents these challenges and complements the affinity-based approaches. IVEC allows for immediate validation and analysis of substrates through in vitro reconstitution. Furthermore, this method can be easily adapted to identify substrates of specific SUMO ligases.
Collapse
Affiliation(s)
- Christian B Gocke
- Department of Pharmacology, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | | |
Collapse
|
16
|
Abstract
Histone modifications in chromatin regulate gene expression. A transcriptional co-repressor complex containing LSD1–CoREST–HDAC1 (termed LCH hereafter for simplicity) represses transcription by coordinately removing histone modifications associated with transcriptional activation. RE1-silencing transcription factor (REST) recruits LCH to the promoters of neuron-specific genes, thereby silencing their transcription in non-neuronal tissues. ZNF198 is a member of a family of MYM-type zinc finger proteins that associate with LCH. Here, we show that ZNF198-like proteins are required for the repression of E-cadherin (a gene known to be repressed by LSD1), but not REST-responsive genes. ZNF198 binds preferentially to the intact LCH ternary complex, but not its individual subunits. ZNF198- and REST-binding to the LCH complex are mutually exclusive. ZNF198 associates with chromatin independently of LCH. Furthermore, modification of HDAC1 by small ubiquitin-like modifier (SUMO) in vitro weakens its interaction with CoREST whereas sumoylation of HDAC1 stimulates its binding to ZNF198. Finally, we mapped the LCH- and HDAC1–SUMO-binding domains of ZNF198 to tandem repeats of MYM-type zinc fingers. Therefore, our results suggest that ZNF198, through its multiple protein-protein interaction interfaces, helps to maintain the intact LCH complex on specific, non-REST-responsive promoters and may also prevent SUMO-dependent dissociation of HDAC1.
Collapse
Affiliation(s)
- Christian B. Gocke
- Howard Hughes Medical Institute, Department of Pharmacology, The University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Hongtao Yu
- Howard Hughes Medical Institute, Department of Pharmacology, The University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
- * E-mail:
| |
Collapse
|
17
|
Yang M, Culhane JC, Szewczuk LM, Gocke CB, Brautigam CA, Tomchick DR, Machius M, Cole PA, Yu H. Structural basis of histone demethylation by LSD1 revealed by suicide inactivation. Nat Struct Mol Biol 2007; 14:535-9. [PMID: 17529991 DOI: 10.1038/nsmb1255] [Citation(s) in RCA: 141] [Impact Index Per Article: 8.3] [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: 03/21/2007] [Accepted: 04/26/2007] [Indexed: 11/09/2022]
Abstract
Histone methylation regulates diverse chromatin-templated processes, including transcription. The recent discovery of the first histone lysine-specific demethylase (LSD1) has changed the long-held view that histone methylation is a permanent epigenetic mark. LSD1 is a flavin adenine dinucleotide (FAD)-dependent amine oxidase that demethylates histone H3 Lys4 (H3-K4). However, the mechanism by which LSD1 achieves its substrate specificity is unclear. We report the crystal structure of human LSD1 with a propargylamine-derivatized H3 peptide covalently tethered to FAD. H3 adopts three consecutive gamma-turns, enabling an ideal side chain spacing that places its N terminus into an anionic pocket and positions methyl-Lys4 near FAD for catalysis. The LSD1 active site cannot productively accommodate more than three residues on the N-terminal side of the methyllysine, explaining its H3-K4 specificity. The unusual backbone conformation of LSD1-bound H3 suggests a strategy for designing potent LSD1 inhibitors with therapeutic potential.
Collapse
Affiliation(s)
- Maojun Yang
- Department of Pharmacology, The University of Texas Southwestern Medical Center, 6001 Forest Park Road, Dallas, Texas 75390, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Yang M, Gocke CB, Luo X, Borek D, Tomchick DR, Machius M, Otwinowski Z, Yu H. Structural basis for CoREST-dependent demethylation of nucleosomes by the human LSD1 histone demethylase. Mol Cell 2006; 23:377-87. [PMID: 16885027 DOI: 10.1016/j.molcel.2006.07.012] [Citation(s) in RCA: 244] [Impact Index Per Article: 13.6] [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: 05/05/2006] [Revised: 06/24/2006] [Accepted: 07/18/2006] [Indexed: 01/10/2023]
Abstract
Histone methylation regulates diverse chromatin-templated processes, including transcription. Many transcriptional corepressor complexes contain lysine-specific demethylase 1 (LSD1) and CoREST that collaborate to demethylate mono- and dimethylated H3-K4 of nucleosomes. Here, we report the crystal structure of the LSD1-CoREST complex. LSD1-CoREST forms an elongated structure with a long stalk connecting the catalytic domain of LSD1 and the CoREST SANT2 domain. LSD1 recognizes a large segment of the H3 tail through a deep, negatively charged pocket at the active site and possibly a shallow groove on its surface. CoREST SANT2 interacts with DNA. Disruption of the SANT2-DNA interaction diminishes CoREST-dependent demethylation of nucleosomes by LSD1. The shape and dimension of LSD1-CoREST suggest its bivalent binding to nucleosomes, allowing efficient H3-K4 demethylation. This spatially separated, multivalent nucleosome binding mode may apply to other chromatin-modifying enzymes that generally contain multiple nucleosome binding modules.
Collapse
Affiliation(s)
- Maojun Yang
- Department of Pharmacology, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | | | | | | | | | | | | | | |
Collapse
|
19
|
Kang J, Gocke CB, Yu H. Phosphorylation-facilitated sumoylation of MEF2C negatively regulates its transcriptional activity. BMC Biochem 2006; 7:5. [PMID: 16478538 PMCID: PMC1386686 DOI: 10.1186/1471-2091-7-5] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2005] [Accepted: 02/14/2006] [Indexed: 11/10/2022]
Abstract
Background Sumoylation has emerged as an important posttranslational regulatory mechanism for transcription factors and cofactors. Sumoylation of many transcription factors represses their transcriptional activities. The myocyte enhancer factor 2 (MEF2) family of transcription factors plays an important role in regulating gene expression during myogenesis and has been recently shown to be sumoylated. Results Consistent with earlier reports, we show that sumoylation of MEF2C at K391 inhibits its transcriptional activity. Sumoylation of MEF2C does not block its DNA-binding activity. A small C-terminal fragment of MEF2C containing K391, referred to as delta-N2-MEF2C, is efficiently sumoylated and, when targeted to DNA, represses transcription at neighbouring promoters. Because delta-N2-MEF2C lacks the binding site for class II histone deacetylases (HDACs), this result suggests that sumoylation of MEF2C may help to recruit transcriptional repressors other than these HDACs. Intriguingly, we show that phosphorylation of S396 in MEF2C, a residue in close proximity to the major sumoylation site (K391) and known to be phosphorylated in vivo, enhances sumoylation of delta- N2-MEF2C in vitro. The S396A mutation reduces sumoylation of MEF2C in vivo and enhances the transcription activity of MEF2C in reporter assays. Conclusion We propose that phosphorylation of MEF2C at S396 facilitates its sumoylation at K391, which in turn recruits yet unidentified co-repressors to inhibit transcription. Our studies further suggest that sumoylation motifs containing a phosphorylated serine or an acidic residue at the +5 position might be more efficiently sumoylated.
Collapse
Affiliation(s)
- Jungseog Kang
- Department of Pharmacology, The University of Texas Southwestern Medical Center, 6001, Forest Park Road, Dallas, TX 75390-9041, USA
| | - Christian B Gocke
- Department of Pharmacology, The University of Texas Southwestern Medical Center, 6001, Forest Park Road, Dallas, TX 75390-9041, USA
| | - Hongtao Yu
- Department of Pharmacology, The University of Texas Southwestern Medical Center, 6001, Forest Park Road, Dallas, TX 75390-9041, USA
| |
Collapse
|
20
|
Abstract
Small ubiquitin-like modifier (SUMO) regulates diverse cellular processes through its reversible, covalent attachment to target proteins. Many SUMO substrates are involved in transcription and chromatin structure. Sumoylation appears to regulate the functions of target proteins by changing their subcellular localization, increasing their stability, and/or mediating their binding to other proteins. Using an in vitro expression cloning approach, we have identified 40 human SUMO1 substrates. The spectrum of human SUMO1 substrates identified in our screen suggests general roles of sumoylation in transcription, chromosome structure, and RNA processing. We have validated the sumoylation of 24 substrates in living cells. Analysis of this panel of SUMO substrates leads to the following observations. 1) Sumoylation is more efficient in vitro than in living cells. Polysumoylation occurs on several substrates in vitro. 2) SUMO isopeptidases have little substrate specificity. 3) The SUMO ligases, PIAS1 and PIASxbeta, have broader substrate specificities than does PIASy. 4) Although SUMO1 and SUMO2 are equally efficiently conjugated to a given substrate in vitro, SUMO1 conjugation is more efficient in vivo. 5) Most SUMO substrates localize to the nucleus, and sumoylation does not generally affect their subcellular localization. Therefore, sumoylation appears to regulate the functions of its substrates through multiple, context-dependent mechanisms.
Collapse
Affiliation(s)
- Christian B Gocke
- Department of Pharmacology, the University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | | | | |
Collapse
|
21
|
Obungu VH, Wang Y, Amyot SM, Gocke CB, Beattie DS. Mutations in the tether region of the iron-sulfur protein affect the activity and assembly of the cytochrome bc(1) complex of yeast mitochondria. Biochim Biophys Acta 2000; 1457:36-44. [PMID: 10692548 DOI: 10.1016/s0005-2728(99)00116-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Resolution of the crystal structure of the mitochondrial cytochrome bc(1) complex has indicated that the extra-membranous extrinsic domain of the iron-sulfur protein containing the 2Fe2S cluster is connected by a tether to the transmembrane helix that anchors the iron-sulfur protein to the complex. To investigate the role of this tether in the cytochrome bc(1) complex, we have mutated the conserved amino acid residues Ala-86, Ala-90, Ala-92, Lys-93 and Glu-95 and constructed deletion mutants DeltaVLA(88-90) and DeltaAMA(90-92) and an insertion mutant I87AAA88 in the iron-sulfur protein of the yeast, Saccharomyces cerevisiae. In cells grown at 30 degrees C, enzymatic activities of the bc(1) complex were reduced 22-56% in mutants A86L, A90I, A92C, A92R and E95R, and the deletion mutants, DeltaVLA(88-90) and DeltaAMA(90-92), while activity of the insertion mutant was reduced 90%. No loss of cytochromes b or c-c(1), detected spectrally, or the iron-sulfur protein, determined by quantitative immunoblotting, was observed in these mutants with the exception of the mutants of Ala-92 in which the loss of activity paralleled a loss in the amount of the iron-sulfur protein. EPR spectroscopy revealed no changes in the iron-sulfur cluster of mutants A86L, A90I, A92R or the deletion mutant DeltaVLA(88-90). Greater losses of both protein and activity were observed in all of the mutants of Ala-92 as well as in A90F grown at 37 degrees C. suggesting that these conserved alanine residues may be involved in maintaining the stability of the iron-sulfur protein and its assembly into the bc(1) complex. By contrast, no significant loss of iron-sulfur protein was observed in the mutants of Ala-86 in cells grown at either 30 degrees C or 37 degrees C despite the 50-70% loss of enzymatic activity suggesting that Ala-86 may play a critical role in catalysis in the bc(1) complex.
Collapse
Affiliation(s)
- V H Obungu
- Department of Biochemistry, P.O. Box 9142, West Virginia University School of Medicine, Morgantown, WV 26506-9142, USA
| | | | | | | | | |
Collapse
|