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Zhuk AS, Stepchenkova EI, Zotova IV, Belopolskaya OB, Pavlov YI, Kostroma II, Gritsaev SV, Aksenova AY. G-Quadruplex Forming DNA Sequence Context Is Enriched around Points of Somatic Mutations in a Subset of Multiple Myeloma Patients. Int J Mol Sci 2024; 25:5269. [PMID: 38791307 PMCID: PMC11121618 DOI: 10.3390/ijms25105269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 05/03/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
Multiple myeloma (MM) is the second most common hematological malignancy, which remains incurable despite recent advances in treatment strategies. Like other forms of cancer, MM is characterized by genomic instability, caused by defects in DNA repair. Along with mutations in DNA repair genes and genotoxic drugs used to treat MM, non-canonical secondary DNA structures (four-stranded G-quadruplex structures) can affect accumulation of somatic mutations and chromosomal abnormalities in the tumor cells of MM patients. Here, we tested the hypothesis that G-quadruplex structures may influence the distribution of somatic mutations in the tumor cells of MM patients. We sequenced exomes of normal and tumor cells of 11 MM patients and analyzed the data for the presence of G4 context around points of somatic mutations. To identify molecular mechanisms that could affect mutational profile of tumors, we also analyzed mutational signatures in tumor cells as well as germline mutations for the presence of specific SNPs in DNA repair genes or in genes regulating G-quadruplex unwinding. In several patients, we found that sites of somatic mutations are frequently located in regions with G4 context. This pattern correlated with specific germline variants found in these patients. We discuss the possible implications of these variants for mutation accumulation and specificity in MM and propose that the extent of G4 context enrichment around somatic mutation sites may be a novel metric characterizing mutational processes in tumors.
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Affiliation(s)
- Anna S. Zhuk
- Laboratory of Amyloid Biology, St. Petersburg State University, 199034 St. Petersburg, Russia; (A.S.Z.); (I.V.Z.)
- Institute of Applied Computer Science, ITMO University, 197101 St. Petersburg, Russia
| | - Elena I. Stepchenkova
- Vavilov Institute of General Genetics, St. Petersburg Branch, Russian Academy of Sciences, 199034 St. Petersburg, Russia;
- Department of Genetics and Biotechnology, St. Petersburg State University, 199034 St. Petersburg, Russia
| | - Irina V. Zotova
- Laboratory of Amyloid Biology, St. Petersburg State University, 199034 St. Petersburg, Russia; (A.S.Z.); (I.V.Z.)
- Vavilov Institute of General Genetics, St. Petersburg Branch, Russian Academy of Sciences, 199034 St. Petersburg, Russia;
| | - Olesya B. Belopolskaya
- Resource Center “Bio-Bank Center”, Research Park of St. Petersburg State University, 198504 St. Petersburg, Russia;
- The Laboratory of Genogeography, Vavilov Institute of General Genetics, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Youri I. Pavlov
- Eppley Institute for Research in Cancer, Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA;
- Departments of Biochemistry and Molecular Biology, Microbiology and Pathology, Genetics Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Ivan I. Kostroma
- City Hospital No. 15, 198205 St. Petersburg, Russia; (I.I.K.); (S.V.G.)
| | | | - Anna Y. Aksenova
- Laboratory of Amyloid Biology, St. Petersburg State University, 199034 St. Petersburg, Russia; (A.S.Z.); (I.V.Z.)
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Li J, Jia Z, Wang R, Xiao B, Cai Y, Zhu T, Wang W, Zhang X, Fan S, Fan X, Han W, Lu X. Activated interferon response from DNA damage in multiple myeloma cells contributes to the chemotherapeutic effects of anthracyclines. Front Oncol 2024; 14:1357996. [PMID: 38800411 PMCID: PMC11116600 DOI: 10.3389/fonc.2024.1357996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 04/29/2024] [Indexed: 05/29/2024] Open
Abstract
Introduction Multiple myeloma (MM) is a malignant plasma cell disease caused by abnormal proliferation of clonal plasma cells in bone marrow. Upfront identification of tumor subgroups with specific biological markers has the potential to improve biologically-driven therapy. Previously, we established a molecular classification by stratifying multiple myeloma into two subtypes with a different prognosis based on a gene module co-expressed with MCL-1 (MCL1-M). Methods Gene Ontology (GO) analysis with differentially expressed genes was performed to identify signal pathway. Drug sensitivity was analyzed using the OncoPredict algorithm. Drug sensitivity of different myeloma cell lines was detected by CCK8 and flow cytometry. RNA-seq was performed on drug-sensitive cell lines before and after adriamycin treatment. RT-qPCR was used to further verify the sequencing results. The expression of γ-H2AX and dsDNA in sensitive and resistant cell lines was detected by immunofluorescence method. Results In our study, we demonstrated that MCL1-M low MM were more sensitive to anthracyclines. We treated different myeloma cell lines with doxorubicin in vitro and discovered the association of drug sensitivity with IFN signaling. Herein, we demonstrate that the doxorubicin-sensitive myeloma cell line showed significant DNA damage and up-regulated expression of genes related to the IFN response, which was not observed in drug-insensitive cell lines. Discussion Our results suggest that the active IFN signaling pathway may serve as a marker for predicting chemotherapy sensitivity in patients with myeloma. With our MCL1-M molecular classification system, we can screen patients with a potentially good response to the interferon signaling pathway and provide individualized treatment for MM. We propose IFN-a as adjuvant therapy for patients with myeloma sensitive to anthracyclines to further improve the therapeutic effect and prolong the survival of patients.
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Affiliation(s)
- Jin Li
- Department of Hematology, Changzhou No. 2 People’s Hospital, The Affiliated Hospital of Nanjing Medical University, Changzhou, China
| | - Zhuxia Jia
- Department of Hematology, Changzhou No. 2 People’s Hospital, The Affiliated Hospital of Nanjing Medical University, Changzhou, China
| | - Rongxuan Wang
- Department of Hematology, Changzhou No. 2 People’s Hospital, The Affiliated Hospital of Nanjing Medical University, Changzhou, China
| | - Bitao Xiao
- Department of Hematology, Changzhou No. 2 People’s Hospital, The Affiliated Hospital of Nanjing Medical University, Changzhou, China
| | - Yanan Cai
- Department of Hematology, Changzhou No. 2 People’s Hospital, The Affiliated Hospital of Nanjing Medical University, Changzhou, China
| | - Tianshu Zhu
- Department of Hematology, Changzhou No. 2 People’s Hospital, The Affiliated Hospital of Nanjing Medical University, Changzhou, China
| | - Weiya Wang
- Department of Hematology, Changzhou No. 2 People’s Hospital, The Affiliated Hospital of Nanjing Medical University, Changzhou, China
| | - Xinyue Zhang
- Department of Hematology, Changzhou No. 2 People’s Hospital, The Affiliated Hospital of Nanjing Medical University, Changzhou, China
| | - Shu Fan
- Department of Hematology, Changzhou No. 2 People’s Hospital, The Affiliated Hospital of Nanjing Medical University, Changzhou, China
| | - Xiaolong Fan
- Beijing Key Laboratory of Gene Resource and Molecular Development, Laboratory of Neuroscience and Brain Development, Beijing Normal University, Beijing, China
| | - Wenmin Han
- Department of Hematology, Changzhou No. 2 People’s Hospital, The Affiliated Hospital of Nanjing Medical University, Changzhou, China
| | - Xuzhang Lu
- Department of Hematology, Changzhou No. 2 People’s Hospital, The Affiliated Hospital of Nanjing Medical University, Changzhou, China
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Fu XH, Guan RY, Huang Z, Li Y, Lu G, Mou WW, Du J. From Multiple Myeloma to Acute Myeloid Leukemia: A Case Report of a 61-year-old Woman after 8 Years of Chemotherapy and Immunotherapy. Recent Pat Anticancer Drug Discov 2024; 19:396-401. [PMID: 38214323 DOI: 10.2174/1574892818666230619093300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/28/2023] [Accepted: 05/17/2023] [Indexed: 01/13/2024]
Abstract
BACKGROUND As the second most prevalent hematologic malignancy, multiple myeloma (MM) affects plasma cells and is characterized by chromosomal abnormalities, particularly involving the immunoglobulin heavy chain switch region. MM represents a biologically and clinically heterogeneous hematological malignancy that serves as a clonal evolution model, exhibiting clonal heterogeneity throughout all stages from monoclonal gammopathy undetermined significance (MGUS) and smoldering multiple myeloma (SMM) to MM. Although significant progress has been made in the treatment of MM, leading to improved patient outcomes, concerns are arising regarding disease relapse due to the presence and selection of pre-existing resistant clones or selective pressure during therapy. CASE PRESENTATION We present a case of multiple myeloma (MM) in a female patient, who underwent an 8-year course of treatment, including chemotherapy, immunomodulators, hematopoietic stem cell transplantation, CD38 monoclonal antibody, and chimeric antigen receptor T-cell (CAR-T), and was recently diagnosed with concurrent progressive MM and acute myeloid leukemia (AML). This patient has witnessed the evolution of MM treatment paradigms. CONCLUSION In this course, disease relapses occurred twice, one of which was manifested by a light chain escape (LCE). Moreover, through the course of the disease in this patient, we review the process of clonal evolution that may be relevant.
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Affiliation(s)
- Xue-Hang Fu
- Department of Hematology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Rong-Yan Guan
- Department of Hematology, Aviation General Hospital, Beijing, 100012, China
| | - Zoufang Huang
- Ganzhou Key Laboratory of Hematology, Department of Hematology, The First Affiliated Hospital of Gannan Medical University, 341000 Ganzhou, Jiangxi, China
| | - Yun Li
- Department of Hematology, Aviation General Hospital, Beijing, 100012, China
| | - Guang Lu
- Department of Hematology, Shengli Oilfield Central Hospital, Dongying, 257099, China
| | - Wei-Wei Mou
- Department of Pediatrics, Shengli Oilfield Central Hospital, Dongying, 257034, China
| | - Jun Du
- Department of Hematology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
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Langston RG, Pinckard-Dover H, Guzman G, Wardell CP, Gokden M, Morris TW, Day JD, Rodriguez A. Intracranial hematolymphoid malignancies: A case series with molecular characterization. Clin Neurol Neurosurg 2023; 233:107928. [PMID: 37573681 DOI: 10.1016/j.clineuro.2023.107928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 07/31/2023] [Indexed: 08/15/2023]
Abstract
OBJECTIVE Central nervous system (CNS) manifestations of hematologic malignancies are uncommon and often have a poor prognosis. As hematologic neoplasms are typically chemotherapy- and radiotherapy-sensitive, surgical resection is usually not indicated; thus, opportunities for in-depth characterization of CNS hematologic tumors are limited. Here, we report four cases of rare intracranial hematologic tumors requiring surgical intervention, allowing for histopathologic and genomic characterization. METHODS The clinical course, genetic perturbations, and histopathological features are described for a case of 1) primary marginal zone B-cell lymphoma of the dura as well as cases of brain metastases of 2) cutaneous T-cell lymphoma, 3) acute myeloid leukemia/myeloid sarcoma, and 4) multiple myeloma. Targeted DNA sequencing, fluorescence in situ hybridization, cytogenetic analysis, flow cytometry and immunohistochemical staining were used to assess the lesions. RESULT Molecular and histopathological characterizations of four unusual presentations of hematolymphoid diseases involving the CNS are presented. Genetic abnormalities were identified in each lesion, including chromosomal aberrations and single nucleotide variants resulting in missense or nonsense mutations in oncogenes. CONCLUSIONS Our case series provides insight into unique pathological phenotypes of hematologic neoplasms with atypical CNS involvement. We offer targets for future studies by identifying potentially pathogenic genetic variants in these lesions, as the full implications of the novel molecular abnormalities described remain unclear.
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Affiliation(s)
- Rebekah G Langston
- Department of Neurosurgery, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Heather Pinckard-Dover
- Department of Neurosurgery, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Grace Guzman
- Department of Neurosurgery, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Christopher P Wardell
- Department of Biomedical Informatics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Murat Gokden
- Division of Neuropathology, Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - T W Morris
- Department of Neurosurgery, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - J D Day
- Department of Neurosurgery, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Analiz Rodriguez
- Department of Neurosurgery, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
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Dratwa M, Łacina P, Butrym A, Porzuczek D, Mazur G, Bogunia-Kubik K. Telomere length and hTERT genetic variants as potential prognostic markers in multiple myeloma. Sci Rep 2023; 13:15792. [PMID: 37737335 PMCID: PMC10517131 DOI: 10.1038/s41598-023-43141-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 09/20/2023] [Indexed: 09/23/2023] Open
Abstract
Telomere dysfunction is a notable event observed in many cancers contributing to their genomic instability. A major factor controlling telomere stability is the human telomerase reverse transcriptase catalytic subunit (hTERT). Telomere shortening has been observed in multiple myeloma (MM), a plasma cell malignancy with a complex and heterogeneous genetic background. In the present study, we aimed to analyse telomere length and hTERT genetic variants as potential markers of risk and survival in 251 MM patients. We found that telomere length was significantly shorter in MM patients than in healthy individuals, and patients with more advanced disease (stage III according to the International Staging System) had shorter telomeres than patients with less advanced disease. MM patients with hTERT allele rs2736100 T were characterized with significantly shorter progression-free survival (PFS). Moreover, allele rs2736100 T was also found to be less common in patients with disease progression in response to treatment. hTERT rs2853690 T was associated with higher haemoglobin blood levels and lower C-reactive protein. In conclusion, our results suggest that telomere length and hTERT genetic variability may affect MM development and can be potential prognostic markers in this disease.
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Affiliation(s)
- Marta Dratwa
- Laboratory of Clinical Immunogenetics and Pharmacogenetics, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wrocław, Poland
| | - Piotr Łacina
- Laboratory of Clinical Immunogenetics and Pharmacogenetics, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wrocław, Poland
| | - Aleksandra Butrym
- Department of Cancer Prevention and Therapy, Wroclaw Medical University, Wrocław, Poland
| | - Diana Porzuczek
- Department of Internal, Occupational Diseases, Hypertension and Clinical Oncology, Wroclaw Medical University, Wrocław, Poland
| | - Grzegorz Mazur
- Department of Internal, Occupational Diseases, Hypertension and Clinical Oncology, Wroclaw Medical University, Wrocław, Poland
| | - Katarzyna Bogunia-Kubik
- Laboratory of Clinical Immunogenetics and Pharmacogenetics, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wrocław, Poland.
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Coccaro N, Anelli L, Zagaria A, Tarantini F, Cumbo C, Tota G, Minervini CF, Minervini A, Conserva MR, Redavid I, Parciante E, Macchia MG, Specchia G, Musto P, Albano F. Feasibility of Optical Genome Mapping in Cytogenetic Diagnostics of Hematological Neoplasms: A New Way to Look at DNA. Diagnostics (Basel) 2023; 13:diagnostics13111841. [PMID: 37296693 DOI: 10.3390/diagnostics13111841] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 05/19/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023] Open
Abstract
Optical genome mapping (OGM) is a new genome-wide technology that can reveal both structural genomic variations (SVs) and copy number variations (CNVs) in a single assay. OGM was initially employed to perform genome assembly and genome research, but it is now more widely used to study chromosome aberrations in genetic disorders and in human cancer. One of the most useful OGM applications is in hematological malignancies, where chromosomal rearrangements are frequent and conventional cytogenetic analysis alone is insufficient, necessitating further confirmation using ancillary techniques such as fluorescence in situ hybridization, chromosomal microarrays, or multiple ligation-dependent probe amplification. The first studies tested OGM efficiency and sensitivity for SV and CNV detection, comparing heterogeneous groups of lymphoid and myeloid hematological sample data with those obtained using standard cytogenetic diagnostic tests. Most of the work based on this innovative technology was focused on myelodysplastic syndromes (MDSs), acute myeloid leukemia (AML), and acute lymphoblastic leukemia (ALL), whereas little attention was paid to chronic lymphocytic leukemia (CLL) or multiple myeloma (MM), and none was paid to lymphomas. The studies showed that OGM can now be considered as a highly reliable method, concordant with standard cytogenetic techniques but able to detect novel clinically significant SVs, thus allowing better patient classification, prognostic stratification, and therapeutic choices in hematological malignancies.
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Affiliation(s)
- Nicoletta Coccaro
- Hematology and Stem Cell Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Luisa Anelli
- Hematology and Stem Cell Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Antonella Zagaria
- Hematology and Stem Cell Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Francesco Tarantini
- Hematology and Stem Cell Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Cosimo Cumbo
- Hematology and Stem Cell Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Giuseppina Tota
- Hematology and Stem Cell Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Crescenzio Francesco Minervini
- Hematology and Stem Cell Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Angela Minervini
- Hematology and Stem Cell Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Maria Rosa Conserva
- Hematology and Stem Cell Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Immacolata Redavid
- Hematology and Stem Cell Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Elisa Parciante
- Hematology and Stem Cell Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Maria Giovanna Macchia
- Hematology and Stem Cell Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Giorgina Specchia
- School of Medicine, University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Pellegrino Musto
- Hematology and Stem Cell Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari "Aldo Moro", 70124 Bari, Italy
| | - Francesco Albano
- Hematology and Stem Cell Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari "Aldo Moro", 70124 Bari, Italy
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Akcora-Yildiz D, Ozkan T, Ozen M, Gunduz M, Sunguroglu A, Beksac M. Werner helicase is required for proliferation and DNA damage repair in multiple myeloma. Mol Biol Rep 2023; 50:1565-1573. [PMID: 36515823 DOI: 10.1007/s11033-022-08178-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 12/06/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND Multiple myeloma (MM), characterized by extensive genomic instability and aberrant DNA damage repair, is a plasma cell malignancy due to the excessive proliferation of monoclonal antibody-producing plasma cells in the bone marrow. Despite the significant improvement in the survival of patients with the development of novel therapeutic agents, MM remains an incurable disease. Werner (WRN) helicase, a member of the RecQ helicase family that contributes to DNA replication, recombination, and repair, has been highlighted in cancer cell survival, yet the role and mechanism of WRN in MM remain unclear. METHODS AND RESULTS Increased mRNA expression of WRN in newly diagnosed and relapsed CD138+ myeloma plasma cells than normal CD138+ plasma cells and their matched CD138- non-tumorigenic cells were detected by qPCR. Using NSC19630, a specific WRN helicase inhibitor, we further showed decreased cell viability, proliferation, and DNA repair and increased DNA damage and apoptosis in MM cells by MTT assay, cell cycle assay, apoptosis assay, and Western blotting. CONCLUSIONS The results of the present study demonstrate that WRN is essential in MM cell viability, proliferation, and genomic stability, indicating its inhibition may enhance the efficacy of chemotherapy in MM.
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Affiliation(s)
- Dilara Akcora-Yildiz
- Department of Biology, Art & Science Faculty, Mehmet Akif Ersoy University, Burdur, Turkey.
| | - Tulin Ozkan
- Department of Medical Biology, Faculty of Medicine, Ankara University, Ankara, Turkey
| | - Mehmet Ozen
- Hematology and Bone Marrow Transplant Unit, Bayındır Sogutozu Hospital, Ankara, Turkey
| | - Mehmet Gunduz
- Department of Hematology, Faculty of Medicine, Biruni University, Istanbul, Turkey
| | - Asuman Sunguroglu
- Department of Medical Biology, Faculty of Medicine, Ankara University, Ankara, Turkey
| | - Meral Beksac
- Department of Hematology, Faculty of Medicine, Ankara University, Ankara, Turkey
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Newly Synthesized Melphalan Analogs Induce DNA Damage and Mitotic Catastrophe in Hematological Malignant Cancer Cells. Int J Mol Sci 2022; 23:ijms232214258. [PMID: 36430734 PMCID: PMC9693175 DOI: 10.3390/ijms232214258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/12/2022] [Accepted: 11/15/2022] [Indexed: 11/19/2022] Open
Abstract
Myeloablative therapy with highdoses of the cytostatic drug melphalan (MEL) in preparation for hematopoietic cell transplantation is the standard of care for multiple myeloma (MM) patients. Melphalan is a bifunctional alkylating agent that covalently binds to nucleophilic sites in the DNA and effective in the treatment, but unfortunately has limited therapeutic benefit. Therefore, new approaches are urgently needed for patients who are resistant to existing standard treatment with MEL. Regulating the pharmacological activity of drug molecules by modifying their structure is one method for improving their effectiveness. The purpose of this work was to analyze the physicochemical and biological properties of newly synthesized melphalan derivatives (EE-MEL, EM-MEL, EM-MOR-MEL, EM-I-MEL, EM-T-MEL) obtained through the esterification of the carboxyl group and the replacement of the the amino group with an amidine group. Compounds were selected based on our previous studies for their improved anticancer properties in comparison with the original drug. For this, we first evaluated the physicochemical properties using the circular dichroism technique, then analyzed the zeta potential and the hydrodynamic diameters of the particles. Then, the in vitro biological properties of the analogs were tested on multiple myeloma (RPMI8226), acute monocytic leukemia (THP1), and promyelocytic leukemia (HL60) cells as model systems for hematological malignant cells. DNA damage was assessed by immunostaining γH2AX, cell cycle distribution changes by propidium iodide (PI) staining, and cell death by the activation of caspase 2. We proved that the newly synthesized derivatives, in particular EM-MOR-MEL and EM-T-MEL, affected the B-DNA conformation, thus increasing the DNA damage. As a result of the DNA changes, the cell cycle was arrested in the S and G2/M phases. The cell death occurred by activating a mitotic catastrophe. Our investigations suggest that the analogs EM-MOR-MEL and EM-T-MEL have better anti-cancer activity in multiple myeloma cells than the currently used melphalan.
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Autophagy in Hematological Malignancies. Cancers (Basel) 2022; 14:cancers14205072. [PMID: 36291856 PMCID: PMC9600546 DOI: 10.3390/cancers14205072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 10/10/2022] [Accepted: 10/13/2022] [Indexed: 11/29/2022] Open
Abstract
Simple Summary Autophagy is a dynamic and tightly regulated process that seems to have dual effects in cancer. In some contexts, it can induce carcinogenesis and promote cancer cell survival, whereas in others, it acts preventing tumor cell growth and tumor progression. Thus, autophagy functions seem to strictly depend on cancer ontogenesis, progression, and type. Here, we will dive into the current knowledge of autophagy in hematological malignancies and will highlight the main genetic components involved in each cancer type. Abstract Autophagy is a highly conserved metabolic pathway via which unwanted intracellular materials, such as unfolded proteins or damaged organelles, are digested. It is activated in response to conditions of oxidative stress or starvation, and is essential for the maintenance of cellular homeostasis and other vital functions, such as differentiation, cell death, and the cell cycle. Therefore, autophagy plays an important role in the initiation and progression of tumors, including hematological malignancies, where damaged autophagy during hematopoiesis can cause malignant transformation and increase cell proliferation. Over the last decade, the importance of autophagy in response to standard pharmacological treatment of hematological tumors has been observed, revealing completely opposite roles depending on the tumor type and stage. Thus, autophagy can promote tumor survival by attenuating the cellular damage caused by drugs and/or stabilizing oncogenic proteins, but can also have an antitumoral effect due to autophagic cell death. Therefore, autophagy-based strategies must depend on the context to create specific and safe combination therapies that could contribute to improved clinical outcomes. In this review, we describe the process of autophagy and its role on hematopoiesis, and we highlight recent research investigating its role as a potential therapeutic target in hematological malignancies. The findings suggest that genetic variants within autophagy-related genes modulate the risk of developing hemopathies, as well as patient survival.
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Saadoune C, Nouadi B, Hamdaoui H, Chegdani F, Bennis F. Multiple Myeloma: Bioinformatic Analysis for Identification of Key Genes and Pathways. Bioinform Biol Insights 2022; 16:11779322221115545. [PMID: 35958298 PMCID: PMC9358573 DOI: 10.1177/11779322221115545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 06/26/2022] [Indexed: 01/02/2023] Open
Abstract
Multiple myeloma (MM) is a hematological malignancy in which monoclonal plasma cells multiply in the bone marrow and monoclonal immunoglobulins are overproduced in older people. Several molecular and cytogenetic advances allow scientists to identify several genetic and chromosomal abnormalities that cause the disease. The comprehension of the pathophysiology of MM requires an understanding of the characteristics of malignant clones and the changes in the bone marrow microenvironment. This study aims to identify the central genes and to determine the key signaling pathways in MM by in silico approaches. A list of 114 differentially expressed genes (DEGs) is important in the prognosis of MM. The DEGs are collected from scientific publications and databases (https://www.ncbi.nlm.nih.gov/). These data are analyzed by Search Tool for the Retrieval of Interacting Genes/Proteins (STRING) software (https://string-db.org/) through the construction of protein-protein interaction (PPI) networks and enrichment analysis of the Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways, by CytoHubba, AutoAnnotate, Bingo Apps plugins in Cytoscape software (https://cytoscape.org/) and by DAVID database (https://david.ncifcrf.gov/). The analysis of the results shows that there are 7 core genes, including TP53; MYC; CDND1; IL6; UBA52; EZH2, and MDM2. These top genes appear to play a role in the promotion and progression of MM. According to functional enrichment analysis, these genes are mainly involved in the following signaling pathways: Epstein-Barr virus infection, microRNA pathway, PI3K-Akt signaling pathway, and p53 signaling pathway. Several crucial genes, including TP53, MYC, CDND1, IL6, UBA52, EZH2, and MDM2, are significantly correlated with MM, which may exert their role in the onset and evolution of MM.
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Affiliation(s)
- Chaimaa Saadoune
- Laboratory of Immunology and Biodiversity, Faculty of Sciences Aïn Chock, Hassan II University of Casablanca, Casablanca, Morocco
| | - Badreddine Nouadi
- Laboratory of Immunology and Biodiversity, Faculty of Sciences Aïn Chock, Hassan II University of Casablanca, Casablanca, Morocco
| | - Hasna Hamdaoui
- Laboratory of Immunology and Biodiversity, Faculty of Sciences Aïn Chock, Hassan II University of Casablanca, Casablanca, Morocco.,Laboratory of Medical Genetics, University Hospital Center Tangier-Tetouan-Al Hoceima, Tangier, Morocco
| | - Fatima Chegdani
- Laboratory of Immunology and Biodiversity, Faculty of Sciences Aïn Chock, Hassan II University of Casablanca, Casablanca, Morocco
| | - Faiza Bennis
- Laboratory of Immunology and Biodiversity, Faculty of Sciences Aïn Chock, Hassan II University of Casablanca, Casablanca, Morocco
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Rana PS, Murphy EV, Kort J, Driscoll JJ. Road testing new CAR design strategies in multiple myeloma. Front Immunol 2022; 13:957157. [PMID: 36016950 PMCID: PMC9395635 DOI: 10.3389/fimmu.2022.957157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 07/20/2022] [Indexed: 11/21/2022] Open
Abstract
A deeper understanding of basic immunology principles and advances in bioengineering have accelerated the mass production of genetically-reprogrammed T-cells as living drugs to treat human diseases. Autologous and allogeneic cytotoxic T-cells have been weaponized to brandish MHC-independent chimeric antigen receptors (CAR) that specifically engage antigenic regions on tumor cells. Two distinct CAR-based therapeutics designed to target BCMA are now FDA-approved based upon robust, sustained responses in heavily-pretreated multiple myeloma (MM) patients enrolled on the KarMMa and CARTITUDE-1 studies. While promising, CAR T-cells present unique challenges such as antigen escape and T-cell exhaustion. Here, we review novel strategies to design CARs that overcome current limitations. Co-stimulatory signaling regions were added to second-generation CARs to promote IL-2 synthesis, activate T-cells and preclude apoptosis. Third-generation CARs are composed of multiple co-stimulatory signaling units, e.g., CD28, OX40, 4-1BB, to reduce exhaustion. Typically, CAR T-cells incorporate a potent constitutive promoter that maximizes long-term CAR expression but extended CAR activation may also promote T-cell exhaustion. Hypoxia-inducible elements can be incorporated to conditionally drive CAR expression and selectively target MM cells within bone marrow. CAR T-cell survival and activity is further realized by blocking intrinsic regulators of T-cell inactivation. T-Cells Redirected for Universal Cytokine Killing (TRUCKs) bind a specific tumor antigen and produce cytokines to recruit endogenous immune cells. Suicide genes have been engineered into CAR T-cells given the potential for long-term on-target, off-tumor effects. Universal allo-CAR T-cells represent an off-the-shelf source, while logic-gated CAR T-cells are designed to recognize tumor-specific features coupled with Boolean-generated binary gates that then dictate cell-fate decisions. Future generations of CARs should further revitalize immune responses, enhance tumor specificity and reimagine strategies to treat myeloma and other cancers.
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Affiliation(s)
- Priyanka S. Rana
- Division of Hematology & Oncology, Department of Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Elena V. Murphy
- Department of Biochemistry, Case Western Reserve University, Cleveland, OH, United States
| | - Jeries Kort
- Division of Hematology & Oncology, Department of Medicine, Case Western Reserve University, Cleveland, OH, United States
- Case Comprehensive Cancer Center, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - James J. Driscoll
- Division of Hematology & Oncology, Department of Medicine, Case Western Reserve University, Cleveland, OH, United States
- Case Comprehensive Cancer Center, School of Medicine, Case Western Reserve University, Cleveland, OH, United States
- *Correspondence: James J. Driscoll,
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12
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Salomon-Perzyński A, Barankiewicz J, Machnicki M, Misiewicz-Krzemińska I, Pawlak M, Radomska S, Krzywdzińska A, Bluszcz A, Stawiński P, Rydzanicz M, Jakacka N, Solarska I, Borg K, Spyra-Górny Z, Szpila T, Puła B, Grosicki S, Stokłosa T, Płoski R, Lech-Marańda E, Jakubikova J, Jamroziak K. Tracking Clonal Evolution of Multiple Myeloma Using Targeted Next-Generation DNA Sequencing. Biomedicines 2022; 10:biomedicines10071674. [PMID: 35884979 PMCID: PMC9313382 DOI: 10.3390/biomedicines10071674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 07/06/2022] [Accepted: 07/09/2022] [Indexed: 12/19/2022] Open
Abstract
Clonal evolution drives treatment failure in multiple myeloma (MM). Here, we used a custom 372-gene panel to track genetic changes occurring during MM progression at different stages of the disease. A tumor-only targeted next-generation DNA sequencing was performed on 69 samples sequentially collected from 30 MM patients. The MAPK/ERK pathway was mostly affected with KRAS mutated in 47% of patients. Acquisition and loss of mutations were observed in 63% and 37% of patients, respectively. Four different patterns of mutation evolution were found: branching-, mutation acquisition-, mutation loss- and a stable mutational pathway. Better response to anti-myeloma therapy was more frequently observed in patients who followed the mutation loss-compared to the mutation acquisition pathway. More than two-thirds of patients had druggable genes mutated (including cases of heavily pre-treated disease). Only 7% of patients had a stable copy number variants profile. Consequently, a redistribution in stages according to R-ISS between the first and paired samples (R-ISS″) was seen. The higher the R-ISS″, the higher the risk of MM progression and death. We provided new insights into the genetics of MM evolution, especially in heavily pre-treated patients. Additionally, we confirmed that redefining R-ISS at MM relapse is of high clinical value.
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Affiliation(s)
- Aleksander Salomon-Perzyński
- Department of Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland; (A.S.-P.); (J.B.); (N.J.); (T.S.); (B.P.); (E.L.-M.)
| | - Joanna Barankiewicz
- Department of Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland; (A.S.-P.); (J.B.); (N.J.); (T.S.); (B.P.); (E.L.-M.)
| | - Marcin Machnicki
- Department of Tumor Biology and Genetics, Medical University of Warsaw, 02-106 Warsaw, Poland; (M.M.); (T.S.)
| | - Irena Misiewicz-Krzemińska
- Department of Experimental Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland; (I.M.-K.); (M.P.)
| | - Michał Pawlak
- Department of Experimental Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland; (I.M.-K.); (M.P.)
| | - Sylwia Radomska
- Molecular Biology Laboratory, Department of Diagnostic Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland; (S.R.); (I.S.)
| | - Agnieszka Krzywdzińska
- Immunophenotyping Laboratory, Department of Diagnostic Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland;
| | - Aleksandra Bluszcz
- Cytogenetic Laboratory, Department of Diagnostic Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland; (A.B.); (K.B.)
| | - Piotr Stawiński
- Department of Medical Genetics, Medical University of Warsaw, 02-106 Warsaw, Poland; (P.S.); (M.R.); (R.P.)
| | - Małgorzata Rydzanicz
- Department of Medical Genetics, Medical University of Warsaw, 02-106 Warsaw, Poland; (P.S.); (M.R.); (R.P.)
| | - Natalia Jakacka
- Department of Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland; (A.S.-P.); (J.B.); (N.J.); (T.S.); (B.P.); (E.L.-M.)
| | - Iwona Solarska
- Molecular Biology Laboratory, Department of Diagnostic Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland; (S.R.); (I.S.)
| | - Katarzyna Borg
- Cytogenetic Laboratory, Department of Diagnostic Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland; (A.B.); (K.B.)
| | - Zofia Spyra-Górny
- Department of Hematology and Cancer Prevention, Faculty od Health Sciences, Medical University of Silesia in Katowice, 40-055 Katowice, Poland; (Z.S.-G.); (S.G.)
| | - Tomasz Szpila
- Department of Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland; (A.S.-P.); (J.B.); (N.J.); (T.S.); (B.P.); (E.L.-M.)
| | - Bartosz Puła
- Department of Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland; (A.S.-P.); (J.B.); (N.J.); (T.S.); (B.P.); (E.L.-M.)
| | - Sebastian Grosicki
- Department of Hematology and Cancer Prevention, Faculty od Health Sciences, Medical University of Silesia in Katowice, 40-055 Katowice, Poland; (Z.S.-G.); (S.G.)
| | - Tomasz Stokłosa
- Department of Tumor Biology and Genetics, Medical University of Warsaw, 02-106 Warsaw, Poland; (M.M.); (T.S.)
| | - Rafał Płoski
- Department of Medical Genetics, Medical University of Warsaw, 02-106 Warsaw, Poland; (P.S.); (M.R.); (R.P.)
| | - Ewa Lech-Marańda
- Department of Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland; (A.S.-P.); (J.B.); (N.J.); (T.S.); (B.P.); (E.L.-M.)
| | - Jana Jakubikova
- Department of Tumor Immunology, Biomedical Research Center, Cancer Research Institute, Slovak Academy of Sciences, Dubravska Cesta 9, 84505 Bratislava, Slovakia;
| | - Krzysztof Jamroziak
- Department of Hematology, Transplantation and Internal Medicine, Medical University of Warsaw, 02-106 Warsaw, Poland
- Correspondence:
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13
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Enukashvily NI, Semenova N, Chubar AV, Ostromyshenskii DI, Gushcha EA, Gritsaev S, Bessmeltsev SS, Rugal VI, Prikhodko EM, Kostroma I, Zherniakova A, Kotova AV, Belik LA, Shumeev A, Maslennikova II, Ivolgin DI. Pericentromeric Non-Coding DNA Transcription Is Associated with Niche Impairment in Patients with Ineffective or Partially Effective Multiple Myeloma Treatment. Int J Mol Sci 2022; 23:ijms23063359. [PMID: 35328779 PMCID: PMC8951104 DOI: 10.3390/ijms23063359] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/16/2022] [Accepted: 03/17/2022] [Indexed: 12/13/2022] Open
Abstract
Mesenchymal stromal cells (MSC) ‘educated’ by tumor cells are an essential component of the multiple myeloma (MM) tumor microenvironment (TME) involved in tumor progression. Transcription of tandemly repeated (TR) non-coding DNA is often activated in many tumors and is required for tumor progression and cancer cells genome reorganization. The aim of the work was to study functional properties including the TR DNA transcription profile of MSC from the hematopoietic niche of treated MM patients. Healthy donors (HD) and patients after bortezomib-based treatment (with partial or complete response, PoCR, and non-responders, NR) were enrolled in the study. Their trephine biopsies were examined histologically to evaluate the hematopoietic niche. MSC cultures obtained from the biopsies were used for evaluation of the proliferation rate, osteogenic differentiation, presence of tumor MSC markers, resistance to bortezomib, and pericentromeric TR DNA transcription level. The MSC ‘education’ by multiple myeloma cells was mimicked in co-culture experiments with or without bortezomib. The TR DNA transcription profile was accessed. The histological examination revealed the persistence of the tumor microenvironment (especially of the vasculature) in treated patients. In co-culture experiments, MSC of bortezomib-treated patients were more resistant to bortezomib and protected cancer MM cells of the RPMI8226 cell line more effectively than HD-MSC did. The MSC obtained from PoCR and NR samples differed in their functional properties (proliferation capacity, osteogenic potential, and cancer-associated fibroblasts markers). Transcriptome analysis revealed activation of the TR transcription in cells of non-hematopoietic origin from NR patients’ bone marrow. The pericentromeric TR DNA of HS2/HS3 families was among the most upregulated in stromal MSC but not in cancer cells. The highest level of transcription was observed in NR-MSC. Transcription of HS2/HS3 was not detected in healthy donors MSC unless they were co-cultured with MM cancer cells and acquired cancer-associated phenotype. Treatment with TNFα downregulated HS2/HS3 transcription in MSC and upregulated in MM cells. Our results suggest that the hematopoietic niche retains the cancer-associated phenotype after treatment. Pericentromeric non-coding DNA transcription is associated with the MSC cancer-associated phenotype in patients with ineffective or partially effective multiple myeloma treatment.
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Affiliation(s)
- Natella I. Enukashvily
- Lab of the Non-Coding DNA Studies, Institute of Cytology, Russian Academy of Sciences, 194064 St. Petersburg, Russia; (A.V.C.); (D.I.O.); (E.A.G.); (A.V.K.); (L.A.B.)
- Cell Technologies Lab, North-Western State Medical University Named after I.I. Mechnikov, 191015 St. Petersburg, Russia; (I.I.M.); (D.I.I.)
- Correspondence: (N.I.E.); (N.S.)
| | - Natalia Semenova
- Clinical Department, Russian Research Institute of Hematology and Transfusiology FMBA of Russia, 191024 St. Petersburg, Russia; (S.G.); (S.S.B.); (V.I.R.); (I.K.); (A.Z.)
- Correspondence: (N.I.E.); (N.S.)
| | - Anna V. Chubar
- Lab of the Non-Coding DNA Studies, Institute of Cytology, Russian Academy of Sciences, 194064 St. Petersburg, Russia; (A.V.C.); (D.I.O.); (E.A.G.); (A.V.K.); (L.A.B.)
| | - Dmitry I. Ostromyshenskii
- Lab of the Non-Coding DNA Studies, Institute of Cytology, Russian Academy of Sciences, 194064 St. Petersburg, Russia; (A.V.C.); (D.I.O.); (E.A.G.); (A.V.K.); (L.A.B.)
| | - Ekaterina A. Gushcha
- Lab of the Non-Coding DNA Studies, Institute of Cytology, Russian Academy of Sciences, 194064 St. Petersburg, Russia; (A.V.C.); (D.I.O.); (E.A.G.); (A.V.K.); (L.A.B.)
| | - Sergei Gritsaev
- Clinical Department, Russian Research Institute of Hematology and Transfusiology FMBA of Russia, 191024 St. Petersburg, Russia; (S.G.); (S.S.B.); (V.I.R.); (I.K.); (A.Z.)
| | - Stanislav S. Bessmeltsev
- Clinical Department, Russian Research Institute of Hematology and Transfusiology FMBA of Russia, 191024 St. Petersburg, Russia; (S.G.); (S.S.B.); (V.I.R.); (I.K.); (A.Z.)
| | - Viktor I. Rugal
- Clinical Department, Russian Research Institute of Hematology and Transfusiology FMBA of Russia, 191024 St. Petersburg, Russia; (S.G.); (S.S.B.); (V.I.R.); (I.K.); (A.Z.)
| | - Egor M. Prikhodko
- Pokrovsky Stem Cell Bank, LLC, 199106 St. Petersburg, Russia; (E.M.P.); (A.S.)
- Faculty of Clinical Propaedeutics, North-Western State Medical University Named after I.I. Mechnikov, 191015 St. Petersburg, Russia
| | - Ivan Kostroma
- Clinical Department, Russian Research Institute of Hematology and Transfusiology FMBA of Russia, 191024 St. Petersburg, Russia; (S.G.); (S.S.B.); (V.I.R.); (I.K.); (A.Z.)
| | - Anastasia Zherniakova
- Clinical Department, Russian Research Institute of Hematology and Transfusiology FMBA of Russia, 191024 St. Petersburg, Russia; (S.G.); (S.S.B.); (V.I.R.); (I.K.); (A.Z.)
| | - Anastasia V. Kotova
- Lab of the Non-Coding DNA Studies, Institute of Cytology, Russian Academy of Sciences, 194064 St. Petersburg, Russia; (A.V.C.); (D.I.O.); (E.A.G.); (A.V.K.); (L.A.B.)
| | - Liubov A. Belik
- Lab of the Non-Coding DNA Studies, Institute of Cytology, Russian Academy of Sciences, 194064 St. Petersburg, Russia; (A.V.C.); (D.I.O.); (E.A.G.); (A.V.K.); (L.A.B.)
| | - Alexander Shumeev
- Pokrovsky Stem Cell Bank, LLC, 199106 St. Petersburg, Russia; (E.M.P.); (A.S.)
| | - Irina I. Maslennikova
- Cell Technologies Lab, North-Western State Medical University Named after I.I. Mechnikov, 191015 St. Petersburg, Russia; (I.I.M.); (D.I.I.)
- Pokrovsky Stem Cell Bank, LLC, 199106 St. Petersburg, Russia; (E.M.P.); (A.S.)
| | - Dmitry I. Ivolgin
- Cell Technologies Lab, North-Western State Medical University Named after I.I. Mechnikov, 191015 St. Petersburg, Russia; (I.I.M.); (D.I.I.)
- Pokrovsky Stem Cell Bank, LLC, 199106 St. Petersburg, Russia; (E.M.P.); (A.S.)
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