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Boyalı O, Kabatas S, Civelek E, Ozdemir O, Bahar-Ozdemir Y, Kaplan N, Savrunlu EC, Karaöz E. Allogeneic mesenchymal stem cells may be a viable treatment modality in cerebral palsy. World J Clin Cases 2024; 12:1585-1596. [PMID: 38576742 PMCID: PMC10989435 DOI: 10.12998/wjcc.v12.i9.1585] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/11/2024] [Accepted: 02/28/2024] [Indexed: 03/25/2024] Open
Abstract
BACKGROUND Cerebral palsy (CP) describes a group of disorders affecting movement, balance, and posture. Disturbances in motor functions constitute the main body of CP symptoms. These symptoms surface in early childhood and patients are affected for the rest of their lives. Currently, treatment involves various pharmacotherapies for different types of CP, including antiepileptics for epilepsy and Botox A for focal spasticity. However, none of these methods can provide full symptom relief. This has prompted researchers to look for new treatment modalities, one of which is mesenchymal stem cell therapy (MSCT). Despite being a promising tool and offering a wide array of possibilities, mesenchymal stem cells (MSCs) still need to be investigated for their efficacy and safety. AIM To analyze the efficacy and safety of MSCT in CP patients. METHODS Our sample consists of four CP patients who cannot stand or walk without external support. All of these cases received allogeneic MSCT six times as 1 × 106/kg intrathecally, intravenously, and intramuscularly using umbilical cord-derived MSCs (UC-MSC). We monitored and assessed the patients pre- and post-treatment using the Wee Functional Independence Measure (WeeFIM), Gross Motor Function Classification System (GMFCS), and Manual Ability Classification Scale (MACS) instruments. We utilized the Modified Ashworth Scale (MAS) to measure spasticity. RESULTS We found significant improvements in MAS scores after the intervention on both sides. Two months: Right χ2 = 4000, P = 0.046, left χ2 = 4000, P = 0.046; four months: Right χ2 = 4000, P = 0.046, left χ2 = 4000, P = 0.046; 12 months: Right χ2 = 4000, P = 0.046, left χ2 = 4000, P = 0.046. However, there was no significant difference in motor functions based on WeeFIM results (P > 0.05). GMFCS and MACS scores differed significantly at 12 months after the intervention (P = 0.046, P = 0.046). Finally, there was no significant change in cognitive functions (P > 0.05). CONCLUSION In light of our findings, we believe that UC-MSC therapy has a positive effect on spasticity, and it partially improves motor functions.
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Affiliation(s)
- Osman Boyalı
- Department of Neurosurgery, University of Health Sciences Turkey, Gaziosmanpaşa Training and Research Hospital, Istanbul 34360, Turkey
| | - Serdar Kabatas
- Department of Neurosurgery, University of Health Sciences Turkey, Gaziosmanpaşa Training and Research Hospital, Istanbul 34360, Turkey
- Center for Stem Cell & Gene Therapy Research and Practice, University of Health Sciences Turkey, Istanbul 34360, Turkey
| | - Erdinç Civelek
- Department of Neurosurgery, University of Health Sciences Turkey, Gaziosmanpaşa Training and Research Hospital, Istanbul 34360, Turkey
| | - Omer Ozdemir
- Department of Neurosurgery, University of Health Sciences Turkey, Gaziosmanpaşa Training and Research Hospital, Istanbul 34360, Turkey
| | - Yeliz Bahar-Ozdemir
- Department of Physical Medicine and Rehabilitation, Health Sciences University Sultan Abdulhamid Han Training and Research Hospital, Istanbul 34668, Turkey
| | - Necati Kaplan
- Department of Neurosurgery, Istanbul Rumeli University, Çorlu Reyap Hospital, Tekirdağ 59860, Turkey
| | - Eyüp Can Savrunlu
- Department of Neurosurgery, Nevşehir State Hospital, Nevşehir 50300, Turkey
| | - Erdal Karaöz
- Center for Regenerative Medicine and Stem Cell Research & Manufacturing (LivMedCell), Liv Hospital, Istanbul 34340, Turkey
- Department of Histology and Embryology, Istinye University, Faculty of Medicine, İstanbul 34010, Turkey
- Center for Stem Cell and Tissue Engineering Research and Practice, Istinye University, Istanbul 34340, Turkey
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Civelek E, Kabatas S, Savrunlu EC, Diren F, Kaplan N, Ofluoğlu D, Karaöz E. Effects of exosomes from mesenchymal stem cells on functional recovery of a patient with total radial nerve injury: A pilot study. World J Stem Cells 2024; 16:19-32. [PMID: 38292440 PMCID: PMC10824039 DOI: 10.4252/wjsc.v16.i1.19] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 11/30/2023] [Accepted: 01/05/2024] [Indexed: 01/22/2024] Open
Abstract
BACKGROUND Peripheral nerve injury can result in significant clinical complications that have uncertain prognoses. Currently, there is a lack of effective pharmacological interventions for nerve damage, despite the existence of several small compounds, peptides, hormones, and growth factors that have been suggested as potential enhancers of neuron regeneration. Despite the objective of achieving full functional restoration by surgical intervention, the persistent challenge of inadequate functional recovery remains a significant concern in the context of peripheral nerve injuries. AIM To examine the impact of exosomes on the process of functional recovery following a complete radial nerve damage. METHODS A male individual, aged 24, who is right-hand dominant and an immigrant, arrived with an injury caused by a knife assault. The cut is located on the left arm, specifically below the elbow. The neurological examination and electrodiagnostic testing reveal evidence of left radial nerve damage. The sural autograft was utilized for repair, followed by the application of 1 mL of mesenchymal stem cell-derived exosome, comprising 5 billion microvesicles. This exosome was split into four equal volumes of 0.25 mL each and delivered microsurgically to both the proximal and distal stumps using the subepineural pathway. The patient was subjected to a period of 180 d during which they had neurological examination and electrodiagnostic testing. RESULTS The duration of the patient's follow-up period was 180 d. An increasing Tinel's sign and sensory-motor recovery were detected even at the 10th wk following nerve grafting. Upon the conclusion of the 6-mo post-treatment period, an evaluation was conducted to measure the extent of improvement in motor and sensory functions of the nerve. This assessment was based on the British Medical Research Council scale and the Mackinnon-Dellon scale. The results indicated that the level of improvement in motor function was classified as M5, denoting an excellent outcome. Additionally, the level of improvement in sensory function was classified as S3+, indicating a good outcome. It is noteworthy that these assessments were conducted in the absence of physical therapy. At the 10th wk post-injury, despite the persistence of substantial axonal damage, the nerve exhibited indications of nerve re-innervation as evidenced by control electromyography (EMG). In contrast to the preceding. EMG analysis revealed a significant electrophysiological enhancement in the EMG conducted at the 6th-mo follow-up, indicating ongoing regeneration. CONCLUSION Enhanced comprehension of the neurobiological ramifications associated with peripheral nerve damage, as well as the experimental and therapy approaches delineated in this investigation, holds the potential to catalyze future clinical progress.
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Affiliation(s)
- Erdinç Civelek
- Department of Neurosurgery, University of Health Sciences, Gaziosmanpaşa Training and Research Hospital, Gaziosmanpaşa 34255, Istanbul, Turkey.
| | - Serdar Kabatas
- Department of Neurosurgery, University of Health Sciences Turkey, Gaziosmanpaşa Training and Research Hospital, Gaziosmanpaşa 34255, Istanbul, Turkey
- Center for Stem Cell & Gene Therapy Research and Practice, University of Health Sciences Turkey, Gaziosmanpaşa 34255, Istanbul, Turkey
| | - Eyüp Can Savrunlu
- Department of Neurosurgery, Nevşehir State Hospital, Nevşehir 50300, Turkey
| | - Furkan Diren
- Department of Neurosurgery, University of Health Sciences Turkey, Gaziosmanpaşa Training and Research Hospital, Gaziosmanpaşa 34255, Istanbul, Turkey
| | - Necati Kaplan
- Department of Neurosurgery, Istanbul Rumeli University, Çorlu Reyap Hospital, Çorlu 59860, Tekirdağ, Turkey
| | - Demet Ofluoğlu
- Department of Physical Medicine and Rehabilitation, Ofluoğlu Klinik, Göztepe 34728, Istanbul, Turkey
| | - Erdal Karaöz
- Liv Hospital, Center for Regenerative Medicine and Stem Cell Research & Manufacturing (LivMedCell), Beşiktaş 34340, Istanbul, Turkey
- Department of Histology and Embryology, Istinye University, Faculty of Medicine, Zeytinburnu 34010, Istanbul, Turkey
- Istinye University, Center for Stem Cell and Tissue Engineering Research and Practice, Beşiktaş 34340, Istanbul, Turkey
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Yahav-Shafir D, Kaplan N, Ledot S, Frogel J, Beinart R, Nof E, Zurrof E, Jamal T, Berkenstadt H, Kogan A. APPLICATION OF “FAST-TRACK” PATHWAY FOR VENTRICULAR TACHYCARDIA CATHETER ABLATION. J Cardiothorac Vasc Anesth 2022. [DOI: 10.1053/j.jvca.2022.09.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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Bilir B, Yilmaz I, Karaarsalan N, Bilir BE, Kaplan N, Ozbek H. Evaluation of Calciferol, Cobalamin, and Stromelysin-1 in Patients with Diabetic Peripheral Neuropathy due to Type-2 Diabetes Mellitus. J Coll Physicians Surg Pak 2022; 32:1255-1259. [PMID: 36205267 DOI: 10.29271/jcpsp.2022.10.1255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Accepted: 09/16/2022] [Indexed: 12/24/2022]
Abstract
OBJECTIVE To evaluate the relationship between calciferol (vitamin D), cobalamin (vitamin-B12), and Stromelysin-1 (MMP-3) circulating levels in patients with diabetic peripheral neuropathy (DPN), patients with DM type 2 (T2DM) without neuropathy, and healthy control groups. STUDY DESIGN Cross-sectional descriptive study. PLACE AND DURATION OF STUDY Department of Internal Medicine, Namik Kemal University of Medicine, Tekirdag, Turkey, between November 2020 and February 2022. METHODOLOGY Healthy, age, and gender matched volunteers who were admitted to the hospital for a check-up with no health problem constituted the control group (n=30). Cases diagnosed with T2DM (n=30) and those with DPN (n=30) comprised the experimental group. Stromelysin-1, calciferol, and cobalamin levels were analysed from blood samples from all groups using enzyme-linked immunosorbent assay (ELISA) with a commercial kit. Tukey's Honest Significant Difference (HSD) test was performed after one-way analysis of variance (ANOVA) for intergroup comparisons. Alpha significance level was accepted as.
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Affiliation(s)
- Bulent Bilir
- Department of Internal Medicine, Namik Kemal University School of Medicine, Tekirdag, Turkey
| | - Ibrahim Yilmaz
- Unit of Pharmacovigilance, Republic of Turkey, Ministry of Health, Doctor Ismail Fehmi Cumalioglu City Hospital, Tekirdag, Turkey
| | - Numan Karaarsalan
- Department of Neurosurgery, Halic University School of Medicine, Istanbul, Turkey
| | - Betul Ekiz Bilir
- Department of Endocrinology and Metabolic Diseases, Republic of Turkey, Ministry of Health, Doctor Ismail Fehmi Cumalioglu City Hospital, Tekirdag, Turkey
| | - Necati Kaplan
- Department of Neurosurgery, Istanbul Rumeli University, Corlu Reyap Hospital, Tekirdag, Turkey
| | - Hanefi Ozbek
- Department of Medical Pharmacology, Izmir Bakircay University School of Medicine, Izmir, Turkey
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Yilmaz I, Akalan H, Karaarslan N, Yasar Sirin D, Kaplan N, Dogan M, Ozbek H, Ates O. Can transcription factors in the intervertebral disc of lopinavir/ritonavir prevent degeneration in the nucleus pulposus by mediating the regulation of inflammation through signaling pathways? Eur Rev Med Pharmacol Sci 2022; 26:6845-6855. [PMID: 36196733 DOI: 10.26355/eurrev_202209_29788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
OBJECTIVE This study was conducted to examine whether lopinavir/ritonavir (Lop/r), an HIV protease inhibitor, can improve disc physiology and slow down intervertebral disc (IVD) degeneration through in vitro experimental methods, as well as whether it can suppress inflammation with interleukin-1 beta (IL-1β) and sex-determining region Y (SRY) protein-related high-mobility group box genes-9 (SOX9) through hypoxia-inducible factor 1-alpha (HIF-1α) and the nuclear factor kappa B (NF-κB) signaling pathway. The aim was to investigate whether Lop/r application is toxic to IVD cells and the microenvironment simultaneously. PATIENTS AND METHODS Human primary cell cultures were prepared using herniated IVD tissues obtained from patients with lumbar disc hernia who were unresponsive to conservative and medical treatment, and thereby, were operated on. The untreated culture samples served as control group, and the samples treated with Lop/r served as study group. Microscopic evaluations were performed simultaneously using fluorescent and supravital dyes in all groups. In addition to cell viability, toxicity, and proliferation analysis through a commercial kit, IL-1β, SOX9, HIF-1α, and NF-κB protein expressions were evaluated using Western blotting. In the statistical comparison of the obtained data, an alpha value less than 0.05 was considered significant. RESULTS Cell proliferation decreased in the Lop/r group, but no cell death was observed (p < 0.05). Moreover, at the end of 72 hours after Lop/r application, IL-1β and NF-kB protein expressions decreased by 40% and 52%, respectively, while HIF-1α and SOX9 protein expressions increased by 4% and 59%, respectively (p< 0.05). CONCLUSIONS Although these data were obtained from an in vitro experimental study, it is believed that these findings could make significant contributions to the pharmaco-regenerative treatment modalities of IVD degeneration. Lop/r suppresses the IL-1β and NF-κB and induces SOX9 and HIF-1α, since these signaling pathways may be related to human IVD degeneration.
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Affiliation(s)
- I Yilmaz
- Unit of Pharmacovigilance and Rational Use of Drugs, Republic of Turkey, Ministry of Health, Dr. Ismail Fehmi Cumalıoglu City Hospital, Tekirdag, Turkey.
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Kim S, Liu H, Kwan K, Im J, Soltani H, Kaplan N, Paller A. 827 Psoriasis exacerbation by obesity reflects reduced adiponectin regulation of PPAR-γ/Th17 pathway activation and is reversal by adiponectin receptor agonism. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Yilmaz I, Akalan H, Yasar Sirin D, Karaarslan N, Kaplan N, Ozbek H. Effects of an acetylcholinesterase inhibitor and an N-methyl-D-aspartate receptor antagonist on inflammation and degeneration of the nucleus pulposus. Eur Rev Med Pharmacol Sci 2022; 26:4409-4419. [PMID: 35776042 DOI: 10.26355/eurrev_202206_29080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE The study aimed to examine the effects of two drugs, an acetylcholinesterase inhibitor (AChEI) and an N-methyl-D-aspartate receptor (NMDAR) antagonist, on degenerated annulus fibrosus (AF) and nucleus pulposus (NP) cells and the extracellular matrix (ECM) structure in vitro. PATIENTS AND METHODS Tissue samples were obtained from patients with intervertebral disc herniation (four males and four females; classified as Pfirmann stage IV) and used to prepare cell cultures. Untreated cell culture samples served as the control group. Study group samples were treated with donepezil, memantine or a combination of the two drugs. Cell viability, toxicity and proliferation were evaluated in all groups. Western blotting was used to examine changes in protein expression of signal transducer and activator of transcription 3 (STAT3), phospho-STAT3 (ser727), hypoxia-inducible factor (HIF)-1 alpha (HIF-1α) and nucleotide-binding oligomerisation domain (NOD) leucine-rich repeat (LRR)-containing proteins (NLR) family pyrin domain containing 3 (NLRP3) inflammasome. The alpha significance value was < 0.05. RESULTS Analysis of the microscopy and commercial kit results revealed that cell proliferation was suppressed, and no cell death was observed. The protein expression levels of NLRP3, STAT3, ser727 and HIF-1α were lower in the samples treated with donepezil and memantine at 72 h (p < 0.05). The protein expression levels of NLRP3, STAT3, ser727 and HIF-1α were higher in the samples treated with the combination of donepezil and memantine (p < 0.05). CONCLUSIONS The combined administration of memantine a NMDAR antagonist which can prevent neurodegeneration and donepezil an AChEI used for pain relief increased the protein expression levels in the anabolic pathway. However, it did not reduce the protein expression levels in the catabolic pathway. Therefore, further studies are needed to provide extensive insight into whether it may be among the potential targets for the therapy of intervertebral disc (IVD) diseases.
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Affiliation(s)
- I Yilmaz
- Republic of Turkey, Ministry of Health, Dr. Ismail Fehmi Cumalioglu City Hospital, Unit of Pharmacovigilance and Rational Use of Drugs, Tekirdag, Turkey.
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Ozger O, Kaplan N. Follicular Variant of Papillary Thyroid Carcinoma Presenting with Thoracic Vertebral Metastasis: A Rare Phenomenon. J Coll Physicians Surg Pak 2022; 32:395-397. [PMID: 35148600 DOI: 10.29271/jcpsp.2022.03.395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 07/28/2020] [Indexed: 06/14/2023]
Abstract
Follicular variant of papillary thyroid carcinoma (FV-PTC) often follows nodal spread; and hematogenous spread is rare. A 77-year male presented to the Neurosurgery Outpatient Clinic with complaints and examination findings of spinal cord compression (SCC) by a mass at the 11th thoracic vertebra (T11). Subtotal mass excision, thoracic corpectomy with cage reconstruction, laminectomy, and posterior spinal stabilisation were performed. The patient, whose pathology result suggested follicular carcinoma metastasis, underwent total thyroidectomy two months after spinal surgery. The pathology of the thyroid was compatible with FV-PTC. Even four years after the total thyroidectomy, the neurological status of the patient was still stable and neither tumoral recurrence nor a new metastasis was detected. In the literature, the number of cases with FV-PTC presenting with SCC due to spinal metastasis is limited. Key Words: Thoracic vertebrae, Metastasis, Papillary thyroid carcinoma, Spinal cord compression.
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Affiliation(s)
- Ozkan Ozger
- Neurosurgery Clinic, Rumeli University, Medicalpark Canakkale Hospital, Istanbul, Turkey
| | - Necati Kaplan
- Neurosurgery Clinic, Rumeli University, Corlu Reyap Hospital, Istanbul, Turkey
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Berger AH, Imielinski M, Duke F, Wala J, Kaplan N, Shi GX, Andres DA, Meyerson M. Correction to: Oncogenic RIT1 mutations in lung adenocarcinoma. Oncogene 2022; 41:2788. [PMID: 35418694 PMCID: PMC9828274 DOI: 10.1038/s41388-022-02300-2] [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: 01/12/2023]
Affiliation(s)
- A. H. Berger
- grid.66859.340000 0004 0546 1623Cancer Program, The Broad Institute of Harvard and M.I.T., 7 Cambridge Center, Cambridge, MA USA ,grid.65499.370000 0001 2106 9910Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA USA
| | - M. Imielinski
- grid.66859.340000 0004 0546 1623Cancer Program, The Broad Institute of Harvard and M.I.T., 7 Cambridge Center, Cambridge, MA USA ,grid.65499.370000 0001 2106 9910Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA USA ,grid.32224.350000 0004 0386 9924Department of Pathology, Massachusetts General Hospital, Boston, MA USA ,grid.38142.3c000000041936754XDepartment of Pathology, Harvard Medical School, Boston, MA USA
| | - F. Duke
- grid.66859.340000 0004 0546 1623Cancer Program, The Broad Institute of Harvard and M.I.T., 7 Cambridge Center, Cambridge, MA USA
| | - J. Wala
- grid.66859.340000 0004 0546 1623Cancer Program, The Broad Institute of Harvard and M.I.T., 7 Cambridge Center, Cambridge, MA USA ,grid.65499.370000 0001 2106 9910Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA USA ,grid.116068.80000 0001 2341 2786Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA USA
| | - N. Kaplan
- grid.65499.370000 0001 2106 9910Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA USA
| | - G. -X Shi
- grid.266539.d0000 0004 1936 8438Department of Molecular and Cellular Biochemistry, University of Kentucky College of Medicine, Lexington, KY USA
| | - D. A. Andres
- grid.266539.d0000 0004 1936 8438Department of Molecular and Cellular Biochemistry, University of Kentucky College of Medicine, Lexington, KY USA
| | - M. Meyerson
- grid.66859.340000 0004 0546 1623Cancer Program, The Broad Institute of Harvard and M.I.T., 7 Cambridge Center, Cambridge, MA USA ,grid.65499.370000 0001 2106 9910Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA USA ,grid.38142.3c000000041936754XDepartment of Pathology, Harvard Medical School, Boston, MA USA
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Hauschwitz P, Martan J, Bičišťová R, Beltrami C, Moskal D, Brodsky A, Kaplan N, Mužík J, Štepánková D, Brajer J, Rostohar D, Kopeček J, Prokešová L, Honner M, Lang V, Smrž M, Mocek T. LIPSS-based functional surfaces produced by multi-beam nanostructuring with 2601 beams and real-time thermal processes measurement. Sci Rep 2021; 11:22944. [PMID: 34824322 PMCID: PMC8617047 DOI: 10.1038/s41598-021-02290-3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 11/12/2021] [Indexed: 11/09/2022] Open
Abstract
A unique combination of the ultrashort high-energy pulsed laser system with exceptional beam quality and a novel Diffractive Optical Element (DOE) enables simultaneous production of 2601 spots organized in the square-shaped 1 × 1 mm matrix in less than 0.01 ms. By adjusting the laser and processing parameters each spot can contain Laser Induced Periodic Surface Structures (LIPSS, ripples), including high-spatial frequency LIPSS (HFSL) and low-spatial frequency LIPSS (LSFL). DOE placed before galvanometric scanner allows easy integration and stitching of the pattern over larger areas. In addition, the LIPSS formation was monitored for the first time using fast infrared radiometry for verification of real-time quality control possibilities. During the LIPSS fabrication, solidification plateaus were observed after each laser pulse, which enables process control by monitoring heat accumulation or plateau length using a new signal derivation approach. Analysis of solidification plateaus after each laser pulse enabled dynamic calibration of the measurement. Heat accumulation temperatures from 200 to 1000 °C were observed from measurement and compared to the theoretical model. The temperature measurements revealed interesting changes in the physics of the laser ablation process. Moreover, the highest throughput on the area of 40 × 40 mm reached 1910 cm2/min, which is the highest demonstrated throughput of LIPSS nanostructuring, to the best of our knowledge. Thus, showing great potential for the efficient production of LIPSS-based functional surfaces which can be used to improve surface mechanical, biological or optical properties.
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Affiliation(s)
- P Hauschwitz
- Hilase Centre, Institute of Physics, Academy of Sciences of the Czech Republic, Za Radnici 828, Dolni Brezany, 25241, Czech Republic.
| | - J Martan
- New Technologies Research Centre (NTC), University of West Bohemia, Univerzitni 8, 30100, Plzen, Czech Republic
| | - R Bičišťová
- Hilase Centre, Institute of Physics, Academy of Sciences of the Czech Republic, Za Radnici 828, Dolni Brezany, 25241, Czech Republic
| | - C Beltrami
- New Technologies Research Centre (NTC), University of West Bohemia, Univerzitni 8, 30100, Plzen, Czech Republic
| | - D Moskal
- New Technologies Research Centre (NTC), University of West Bohemia, Univerzitni 8, 30100, Plzen, Czech Republic
| | - A Brodsky
- R&D Department, Holo/Or Ltd, Einstein 13b, 7403617, Ness Tziona, Israel
| | - N Kaplan
- R&D Department, Holo/Or Ltd, Einstein 13b, 7403617, Ness Tziona, Israel
| | - J Mužík
- Hilase Centre, Institute of Physics, Academy of Sciences of the Czech Republic, Za Radnici 828, Dolni Brezany, 25241, Czech Republic.,Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehova 7, 115 19, Prague, Czech Republic
| | - D Štepánková
- Hilase Centre, Institute of Physics, Academy of Sciences of the Czech Republic, Za Radnici 828, Dolni Brezany, 25241, Czech Republic.,Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehova 7, 115 19, Prague, Czech Republic
| | - J Brajer
- Hilase Centre, Institute of Physics, Academy of Sciences of the Czech Republic, Za Radnici 828, Dolni Brezany, 25241, Czech Republic
| | - D Rostohar
- Hilase Centre, Institute of Physics, Academy of Sciences of the Czech Republic, Za Radnici 828, Dolni Brezany, 25241, Czech Republic
| | - J Kopeček
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, Prague, Czech Republic
| | - L Prokešová
- New Technologies Research Centre (NTC), University of West Bohemia, Univerzitni 8, 30100, Plzen, Czech Republic
| | - M Honner
- New Technologies Research Centre (NTC), University of West Bohemia, Univerzitni 8, 30100, Plzen, Czech Republic
| | - V Lang
- New Technologies Research Centre (NTC), University of West Bohemia, Univerzitni 8, 30100, Plzen, Czech Republic
| | - M Smrž
- Hilase Centre, Institute of Physics, Academy of Sciences of the Czech Republic, Za Radnici 828, Dolni Brezany, 25241, Czech Republic
| | - T Mocek
- Hilase Centre, Institute of Physics, Academy of Sciences of the Czech Republic, Za Radnici 828, Dolni Brezany, 25241, Czech Republic
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Ozger O, Kaplan N. Tuberculous Spondylodiscitis after Lumbar Microdiscectomy. J Coll Physicians Surg Pak 2021; 30:983-986. [PMID: 33036687 DOI: 10.29271/jcpsp.2020.09.983] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 02/07/2020] [Indexed: 11/11/2022]
Abstract
Postoperative spondylodiscitis (PSD) and postoperative osteomyelitis (POM) are known complications of lumbar disc surgery. Many infectious agents play a role in its etiology and it is mostly bacterial. A 55-year male patient underwent lumbar microdiscectomy (LMD) for left L4-5 disc hernia. Lumbar magnetic resonance images of the patient in the postoperative eighth week showed an infection, thought to be due to tuberculosis (TB) in the operation site and adjacent vertebrae. The patient who was positive for the QuantiFERON-TB Gold In-Tube (QFT-GIT) test was diagnosed with TB-induced PSD. The patient received anti-TB treatment consisting of ethambutol, isoniazid, pyrazinamide, and rifampin. We report a very rare case of PSD due to TB infection after LMD. Clinical results and management of the patient was compared with other patients with similar characteristics in the literature. Key Words: Discectomy, Osteomyelitis, Spondylodiscitis, Tuberculosis.
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Affiliation(s)
- Ozkan Ozger
- Neurosurgery Clinic, Istanbul Rumeli University, Medicalpark Canakkale Hospital, Istanbul, Turkey
| | - Necati Kaplan
- Neurosurgery Clinic, Istanbul Rumeli University, Corlu Reyap Hospital, Istanbul, Turkey
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Kabatas S, Civelek E, Savrunlu EC, Kaplan N, Boyalı O, Diren F, Can H, Genç A, Akkoç T, Karaöz E. Feasibility of allogeneic mesenchymal stem cells in pediatric hypoxic-ischemic encephalopathy: Phase I study. World J Stem Cells 2021; 13:470-484. [PMID: 34136076 PMCID: PMC8176840 DOI: 10.4252/wjsc.v13.i5.470] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 02/26/2021] [Accepted: 04/22/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Hypoxic-ischemic encephalopathy (HIE) is one of the leading causes of death and long-term neurological impairment in the pediatric population. Despite a limited number of treatments to cure HIE, stem cell therapies appear to be a potential treatment option for brain injury resulting from HIE.
AIM To investigate the efficacy and safety of stem cell-based therapies in pediatric patients with HIE.
METHODS The study inclusion criteria were determined as the presence of substantial deficit and disability caused by HIE. Wharton’s jelly-derived mesenchymal stem cells (WJ-MSCs) were intrathecally (IT), intramuscularly (IM), and intravenously administered to participants at a dose of 1 × 106/kg for each administration route twice monthly for 2 mo. In different follow-up durations, the effect of WJ-MSCs administration on HIE, the quality of life, prognosis of patients, and side effects were investigated, and patients were evaluated for neurological, cognitive functions, and spasticity using the Wee Functional Independence Measure (Wee FIM) Scale and Modified Ashworth (MA) Scale.
RESULTS For all participants (n = 6), the mean duration of exposure to hypoxia was 39.17 + 18.82 min, the mean time interval after HIE was 21.83 ± 26.60 mo, the mean baseline Wee FIM scale score was 13.5 ± 0.55, and the mean baseline MA scale score was 35 ± 9.08. Three patients developed only early complications such as low-grade fever, mild headache associated with IT injection, and muscle pain associated with IM injection, all of which were transient and disappeared within 24 h. The treatment was evaluated to be safe and effective as demonstrated by magnetic resonance imaging examinations, electroencephalographies, laboratory tests, and neurological and functional scores of patients. Patients exhibited significant improvements in all neurological functions through a 12-mo follow-up. The mean Wee FIM scale score of participants increased from 13.5 ± 0.55 to 15.17 ± 1.6 points (mean ± SD) at 1 mo (z = - 1.826, P = 0.068) and to 23.5 ± 3.39 points at 12 mo (z = -2.207, P = 0.027) post-treatment. The percentage of patients who achieved an excellent functional improvement (Wee FIM scale total score = 126) increased from 10.71% (at baseline) to 12.03% at 1 mo and to 18.65% at 12 mo post-treatment.
CONCLUSION Both the triple-route and multiple WJ-MSC implantations were safe and effective in pediatric patients with HIE with significant neurological and functional improvements. The results of this study support conducting further randomized, placebo-controlled studies on this treatment in the pediatric population.
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Affiliation(s)
- Serdar Kabatas
- Department of Neurosurgery, University of Health Sciences, Gaziosmanpaşa Training and Research Hospital, Istanbul 34255, Turkey
- Pediatric Allergy-Immunology, Marmara University, Institute of Health Sciences, Istanbul 34854, Turkey
- Center for Stem Cell & Gene Therapy Research and Practice, University of Health Sciences, Istanbul 34255, Turkey
| | - Erdinç Civelek
- Department of Neurosurgery, University of Health Sciences, Gaziosmanpaşa Training and Research Hospital, Istanbul 34255, Turkey
- Pediatric Allergy-Immunology, Marmara University, Institute of Health Sciences, Istanbul 34854, Turkey
| | - Eyüp Can Savrunlu
- Department of Neurosurgery, University of Health Sciences, Gaziosmanpaşa Training and Research Hospital, Istanbul 34255, Turkey
| | - Necati Kaplan
- Department of Neurosurgery, Istanbul Rumeli University, Çorlu Reyap Hospital, Tekirdağ 59860, Turkey
| | - Osman Boyalı
- Department of Neurosurgery, University of Health Sciences, Gaziosmanpaşa Training and Research Hospital, Istanbul 34255, Turkey
| | - Furkan Diren
- Department of Neurosurgery, University of Health Sciences, Gaziosmanpaşa Training and Research Hospital, Istanbul 34255, Turkey
| | - Halil Can
- Department of Neurosurgery, Istanbul Biruni University, Faculty of Medicine, Istanbul 34010, Turkey
- Department of Neurosurgery, Istanbul Medicine Hospital, Istanbul 34203, Turkey
| | - Ali Genç
- Department of Neurosurgery, Istanbul Asya Hospital, Istanbul 34250, Turkey
| | - Tunç Akkoç
- Pediatric Allergy-Immunology, Marmara University, Istanbul 34899, Turkey
| | - Erdal Karaöz
- Center for Regenerative Medicine and Stem Cell Research & Manufacturing (LivMedCell), Liv Hospital, Istanbul 34340, Turkey
- Department of Histology and Embryology, Istinye University, Faculty of Medicine, Istanbul 34010, Turkey
- Center for Stem Cell and Tissue Engineering Research and Practice, Istinye University, Istanbul 34340, Turkey
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Peng H, Wang J, Yang W, Kaplan N. 126 EphA2 is a novel regulator of autolysosome recycling at end-stage autophagy and a key regulator in epidermal proliferation. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.02.145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kabatas S, Civelek E, Sezen GB, Kaplan N, Savrunlu EC, Cetin E, Diren F, Karaoz E. Functional Recovery After Wharton's Jelly-Derived Mesenchymal Stem Cell Administration in a Patient with Traumatic Brain Injury: A Pilot Study. Turk Neurosurg 2021; 30:914-922. [PMID: 33216342 DOI: 10.5137/1019-5149.jtn.31732-20.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AIM To introduce a traumatic brain injury (TBI) patient who underwent stem cell transplantation (SCT) in order to minimize the remaining injury deficiencies. MATERIAL AND METHODS This study included a 29 years old male who had TBI resulting from a vehicle accident which took place one and a half years ago. The participant received six doses of intrathecal, intramuscular, and intravenous transplantation of Wharton?s jellv-derived mesenchymal stem cells (WJ-MSCs) at a goal dose of 1xl0 < sup > 6 < /sup > / kg respectively for each route of administration for six months. RESULTS No important negative effects were reported. The patients? speech, cognitive, memory and fine motor skills were improved. The efficacy of treatment with SCT was assessed with cranial magnetic resonance imaging (MRI), computed tomography (CT) screening, and electroencephalography (EEG). CONCLUSION SCT can have a promising future as a medical approach in recurrent TBI.
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Affiliation(s)
- Serdar Kabatas
- University of Health Sciences, Gaziosmanpaşa Training and Research Hospital, Department of Neurosurgery, Istanbul, Turkey
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Kabataş S, Civelek E, Kaplan N, Savrunlu EC, Sezen GB, Chasan M, Can H, Genç A, Akyuva Y, Boyalı O, Diren F, Karaoz E. Phase I study on the safety and preliminary efficacy of allogeneic mesenchymal stem cells in hypoxic-ischemic encephalopathy. World J Exp Med 2021; 11:17-29. [PMID: 33821203 PMCID: PMC8010270 DOI: 10.5493/wjem.v11.i2.17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 02/19/2021] [Accepted: 03/12/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Hypoxic-ischemic encephalopathy (HIE) is a leading cause of morbidity and mortality in the adult as well as in the neonate, with limited options for treatment and significant dysfunctionality.
AIM To investigate the safety and preliminary efficacy of allogeneic mesenchymal stem cells (MSCs) in HIE patients.
METHODS Patients who had HIE for at least 6 mo along with significant dysfunction and disability were included. All patients were given Wharton’s jelly-derived MSCs at 1 × 106/kg intrathecally, intravenously, and intramuscularly twice a month for two months. The therapeutic effects and prognostic implications of MSCs were evaluated by multiple follow-ups. Functional independence measure (FIM), modified Ashworth, and Karnofsky scales were used to assess any side effects, neurological and cognitive functions, and overall outcomes.
RESULTS The 8 subjects included in the study had a mean age of 33.25 ± 10.18 years. Mean HIE exposure and mean post-HIE durations were 45.63 ± 10.18 and 19.67 ± 29.04 mo, respectively. Mean FIM score was 18.38 ± 1.06, mean modified Ashworth score was 43.5 ± 4.63, and mean Karnofsky score was 20. For the first 24 h, 5 of the patients experienced a subfebrile state, accompanied by mild headaches due to intrathecally administration and muscle pain because of intramuscularly administration. Neurological and functional examinations, laboratory tests, electroencephalography, and magnetic resonance imaging were performed to assess safety of treatment. Mean FIM score increased by 20.88 ± 3.31 in the first month (P = 0.027) and by 31.38 ± 14.69 in 12 mo (P = 0.012). The rate of patients with an FIM score of 126 increased from 14.58% to 16.57% in the first month and 24.90% in 12 mo.
CONCLUSION Multiple triple-route Wharton’s jelly-derived MSC administrations were found to be safe for HIE patients, indicating neurological and functional improvement. Based on the findings obtained here, further randomized and placebo research could be performed.
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Affiliation(s)
- Serdar Kabataş
- Department of Neurosurgery, University of Health Sciences, Gaziosmanpaşa Training and Research Hospital, İstanbul 34255, Turkey
- Pediatric Allergy-Immunology, Marmara University, Institute of Health Sciences, İstanbul 34854, Turkey
- Center for Stem Cell and Gene Therapy Research and Practice, University of Health Sciences, İstanbul 34255, Turkey
| | - Erdinç Civelek
- Department of Neurosurgery, University of Health Sciences, Gaziosmanpaşa Training and Research Hospital, İstanbul 34255, Turkey
- Pediatric Allergy-Immunology, Marmara University, Institute of Health Sciences, İstanbul 34854, Turkey
| | - Necati Kaplan
- Department of Neurosurgery, Istanbul Rumeli University, Çorlu Reyap Hospital, Tekirdağ 59860, Turkey
| | - Eyüp Can Savrunlu
- Department of Neurosurgery, University of Health Sciences, Gaziosmanpaşa Training and Research Hospital, İstanbul 34255, Turkey
| | - Gülseli Berivan Sezen
- Department of Neurosurgery, University of Health Sciences, Gaziosmanpaşa Training and Research Hospital, İstanbul 34255, Turkey
| | - Mourat Chasan
- Department of Neurosurgery, University of Health Sciences, Gaziosmanpaşa Training and Research Hospital, İstanbul 34255, Turkey
| | - Halil Can
- Department of Neurosurgery, İstanbul Biruni University, Faculty of Medicine, İstanbul 34010, Turkey
- Department of Neurosurgery, İstanbul Medicine Hospital, İstanbul 34203, Turkey
| | - Ali Genç
- Department of Neurosurgery, İstanbul Asya Hospital, İstanbul 34250, Turkey
| | - Yener Akyuva
- Department of Neurosurgery, Mustafa Kemal University, Faculty of Medicine, Hatay 31060, Turkey
| | - Osman Boyalı
- Department of Neurosurgery, University of Health Sciences, Gaziosmanpaşa Training and Research Hospital, İstanbul 34255, Turkey
| | - Furkan Diren
- Department of Neurosurgery, University of Health Sciences, Gaziosmanpaşa Training and Research Hospital, İstanbul 34255, Turkey
| | - Erdal Karaoz
- Center for Regenerative Medicine and Stem Cell Research and Manufacturing (LivMedCell), Liv Hospital, İstanbul 34340, Turkey
- Department of Histology and Embryology, İstinye University, Faculty of Medicine, İstanbul 34010, Turkey
- Center for Stem Cell and Tissue Engineering Research and Practice, İstinye University, İstanbul 34340, Turkey
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Elnasser Z, Elsamarneh R, Obeidat H, Amarin Z, Jaradat S, Kaplan N. In-vitro activity of tigecycline against multidrug-resistant Gram negative bacteria: The experience of a university hospital. J Infect Public Health 2021; 14:478-483. [PMID: 33743369 DOI: 10.1016/j.jiph.2020.12.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 12/05/2020] [Accepted: 12/08/2020] [Indexed: 01/04/2023] Open
Abstract
The emergence of multidrug-resistant Gram negative bacteria has given rise to significant therapeutic challenges. These pathogens may have developed resistance to tigecycline, which is an alternative antibiotic used empirically in the treatment of serious infections. The objectives of this study were to identify the in-vitro activity of tigecycline against multidrug-resistant Gram negative strains isolated from clinical specimens and their related genes, at a university hospital. For this, 150 clinical isolates of multidrug-resistant Gram negative cultures from various clinical specimens were collected. Bacterial isolates were cultured, identified and their antibiotic susceptibilities were determined. Polymerase chain reaction was performed to amplify AcrB, AmpC, RamR, MexR, AdeB, TetA genes. Results revealed that all isolates were multidrug-resistant. The resistance of isolates was 91.4% to aztreonam, 94.6% to piperacillin, 34% to imipenem, 38.7% to meropenem, 71.3% to levofloxacin, 97.3% to ceftriaxone, 94.7% to cefepime, 9.3% to colistin, 78% to tetracycline, 21.4% to tigecycline and 68% to trimethoprim. AcrB, AmpC, RamR, MexR, AdeB, TetA genes were present in multidrug-resistant Gram negative bacteria. AcrB, RamR, TetA genes were related to tigecycline resistance. It is concluded that infections caused by multidrug-resistant Gram negative bacteria occur at a high rate. Most isolates were multi drug resistant, with 21.4% being resistant to tigecycline.
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Affiliation(s)
- Z Elnasser
- Pathology and Microbiology Department, Jordan University of Science and Technology, Jordan.
| | - R Elsamarneh
- Medical Laboratory Sciences Department, Jordan University of Science and Technology, Jordan
| | - H Obeidat
- Medical Laboratory Sciences Department, Jordan University of Science and Technology, Jordan
| | - Z Amarin
- Department of Obstetrics and Gynecology, Jordan University of Science and Technology, Jordan
| | - S Jaradat
- Department of Biotechnology and Genetic Engineering, Jordan university of Science and Technology, Jordan
| | - N Kaplan
- Pathology and Microbiology Department, Jordan University of Science and Technology, Jordan
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Kumar P, Murphy Z, Lenz S, Kaplan N, Lyass L, Yang S, Bhatt S, Perez White B. 228 Loss of EPHA2 represses GATA-3 function and causes a terminal differentiation defect. J Invest Dermatol 2020. [DOI: 10.1016/j.jid.2020.03.233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Civelek E, Akyuva Y, Kaplan N, Diren F, Boyali O, Kabatas S. Challenges in the Clinical and Radiological Differential Diagnosis of Cerebrovascular Events and Malignant Primary Brain Tumors: Reports from a Retrospective Case Series. Turk Neurosurg 2020; 30:604-613. [PMID: 32530485 DOI: 10.5137/1019-5149.jtn.30371-20.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
AIM To reveal difficulties in differential diagnosis of some cases of cerebrovascular events (CVEs) and malignant primary brain tumors (MBTs) even a multidiciplinary evaluation in grand rounds. MATERIAL AND METHODS This study retrospectively analyzed the patient archives from January 2017?December 2019. The records of 572 patients discussed in these meetings were examined. A total of 8 patients having a challenge in differential diagnosis were detected. RESULTS This study has included 8 cases in which neurology-neurosurgery-neuroradiology clinicians have difficulty in differentiating CVE and MBT. In the present study, three patients were evaluated with a preliminary diagnosis of hemorrhagic CVE in the emergency room. Since degradation products of hemoglobin have prevented advanced imaging methods to diagnose in two patients, these patients have been followed closely. The correct diagnosis could be made through the scan performed during control follow-ups The preliminary diagnosis of seven patients was CVE, but they received the MBT diagnosis during the follow-up. One patient was thought to have MBT initially; however, he/she was diagnosed with CVE after an advanced examination and close follow-up. CONCLUSION Despite developing medical imaging methods and diagnostic studies, there are still some difficulties in making differential diagnosis of CVEs and MBTs. In some patients, further examination and imaging methods may be needed such as magnetic resonance imaging-spectroscopy (MRI-S), perfusion magnetic resonance imaging (Per-MRI), digital substratioangiography (DSA). Despite all these neuroradiological examinations and multidiciplinary evaluation, distinction between CVE and MBT may be difficult, and medicolegal problems may be encountered.
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Affiliation(s)
- Erdinc Civelek
- University of Health Sciences, Gaziosmanpasa Training and Resarch Hospital, Department of Neurosurgery, Istanbul, Turkey
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19
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Kaya YE, Karaarslan N, Sirin DY, Ozbek H, Kaplan N, Yilmaz I. Investigation of the Effects of Methylphenidate, an Amphetamine Derivative, on Intervertebral Disc Tissue Cell Cultures and Matrix Structures. Turk Neurosurg 2019; 29:734-742. [PMID: 31353439 DOI: 10.5137/1019-5149.jtn.26339-19.2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
AIM To investigate the effects of methylphenidate (MPH), on intervertebral disc tissue (IVD) cell cultures and extracellular matrix structures. Changes in the expression of some important marker genes involved in anabolic and catabolic mechanisms of IVD extracellular matrix formation were also evaluated. MATERIAL AND METHODS Primary cultures of nucleus pulposus cells (NPCs) and annulus fibrosus cells (AFCs) were isolated from tissues obtained from the operated patients. Cell viability and proliferation were tested, and the cell surface morphologies were evaluated by microscopy. The expressions of the chondroadherin (CHAD), cartilage oligomeric matrix protein (COMP), interleukin-1 beta (IL-1β) and matrix metalloproteinase (MMP) -7 and MMP-19 genes were evaluated using the quantitative real-time polymerase chain reaction (qRT-PCR). A value of p < 0.05 was considered statistically significant. RESULTS The viability and proliferation of intervertebral disc tissue cells decreased in response to MPH treatment and the expression of the investigated genes also changed. CONCLUSION The data obtained from in-vitro studies may not directly adaptable to clinical applications. However, the fact that the central nervous system stimulant MPH can suppress proliferation of cells derived from IVD tissue should be considered carefully by clinicians.
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Affiliation(s)
- Yasin Emre Kaya
- Bolu Abant Izzet Baysal University, School of Medicine, Department of Orthopaedics and Traumatology, Bolu, Turkey
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20
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Kaplan N, Karaarslan N, Yilmaz I, Sirin DY, Akgun FS, Caliskan T, Simsek AT, Ozbek H. Are Intervertebral Disc Tissue Cells Damaged When Attempting to Prevent Thrombus Formation Using Dabigatran, A New Oral Anticoagulant? Turk Neurosurg 2019; 29:470-477. [PMID: 31124572 DOI: 10.5137/1019-5149.jtn.24336-18.0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
AIM To investigate the effect of dabigatran, a new oral anticoagulant, on human primary cell cultures isolated from intact intervertebral disc tissue. MATERIAL AND METHODS Cell cultures were prepared from tissues obtained from six cases who had undergone surgery due to spinal trauma. Dabigatran, an active pharmacological agent, was applied to intact annulus fibrosus (AF)/nucleus pulposus (NP) primary cell cultures from the study group. After performing cell viability, toxicity, and proliferation tests on all cultures in the control and study groups, the surface morphologies of the samples were evaluated. Subsequently, chondroadherin (CHAD), cartilage oligomeric matrix protein (COMP), and matrix metalloproteinase (MMP)-13 and -19 expressions were measured via a real-time polymerase chain reaction (RT-PCR). Data were analyzed statistically. RESULTS In the proliferation assays performed on the 20th day of the study, cells in the dabigatran-supplemented group were reported to have lost 46.37% more viability than those in the control group. Expressions of all genes examined except MMP-13 were evaluated in the control group by time, but in contrast to the control group results, COMP and MMP-19 gene expressions decreased in the dabigatran-treated group. No CHAD or MMP-13 expression was noted in these cultures. CONCLUSION The potential for a systemically applied drug to accumulate in tissue and negatively affect surrounding tissues and microstructures must be emphasized.
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Affiliation(s)
- Necati Kaplan
- Istanbul Rumeli University, Corlu Reyap Hospital, Department of Neurosurgery, Tekirdag, Turkey
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21
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Kaplan N, Yilmaz I, Karaarslan N, Sirin DY, Simsek AT, Caliskan T, Bircan R, Ozbek H. Evaluation of the Effect of Daptomycin, a Glycopeptide Agent, on Intact Intervertebral Disc Tissue. Turk Neurosurg 2019; 29:522-529. [PMID: 30829382 DOI: 10.5137/1019-5149.jtn.24447-18.3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
AIM To evaluate the effects of pre- and intra-operatively administered daptomycin (DAP) on the intact human primary intervertebral disc tissue cells. MATERIAL AND METHODS Primary cell cultures were established using tissues obtained through decompressive laminectomy, traumatic intervertebral disc herniation excision, and posterior transpedicular stabilization. Non-drug-administered samples were used as a control group. The samples treated with DAP formed the study group. Molecular assays for proliferation and gene expression were performed. The obtained data were evaluated statistically, and results with a value of p < 0.05 were accepted as significant. RESULTS While no reduction was observed in the proliferation, the gene expression of intact intervertebral disc tissue cells was time-dependently decreased compared to the control group, and these results were reported to be statistically significant. CONCLUSION This study observed the effect that a pharmaceutical preparation, which was used on intervertebral disc tissue before and after the operation, had on normal, healthy, and intact tissue. It concludes that alterations in the expression of genes involved in the anabolic and/or catabolic process, even in adjacent healthy tissue, may slow down the healing process of the damaged tissue or cause undesired cell differentiation.
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Affiliation(s)
- Necati Kaplan
- Istanbul Rumeli University, Corlu Reyap Hospital, Department of Neurosurgery, Tekirdag, Turkey
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22
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Kaplan N, Yilmaz I, Karaarslan N, Kaya YE, Sirin DY, Ozbek H. Does Nimodipine, a Selective Calcium Channel Blocker, Impair Chondrocyte Proliferation or Damage Extracellular Matrix Structures? Curr Pharm Biotechnol 2019; 20:517-524. [PMID: 31057106 PMCID: PMC6751346 DOI: 10.2174/1389201020666190506124548] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 04/01/2019] [Accepted: 04/17/2019] [Indexed: 12/18/2022]
Abstract
Background: The study aimed to investigate the effects of the active ingredient, nimodipine, on chondrocyte proliferation and extracellular matrix (ECM) structures in cartilage tissue cells. Methods: Chondrocyte cultures were prepared from tissues resected via surgical operations. Nimodipine was then applied to these cultures and molecular analysis was performed. The data obtained were statisti-cally calculated. Results: Both, the results of the (3-(4,5 dimethylthiazol2-yl)-2,5-diphenyltetrazolium (MTT) assay and the fluorescence microscope analysis [a membrane permeability test carried out with acridine or-ange/propidium iodide staining (AO/PI)] confirmed that the active ingredient, nimodipine, negatively af-fects the cell cultures. Conclusion: Nimodipine was reported to suppress cellular proliferation; chondroadherin (CHAD) and hypoxia-inducible factor-1 alpha (HIF-1α) expression thus decreased by 2.4 and 1.7 times, respectively, at 24 hrs when compared to the control group (p < 0.05). Furthermore, type II collagen (COL2A1) ex-pression was not detected (p < 0.05). The risk that a drug prescribed by a clinician in an innocuous man-ner to treat a patient by relieving the symptoms of a disease may affect the proliferation, differentiation, and viability of other cells and/or tissues at the molecular level, beyond its known side effects or adverse events, should not be forgotten.
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Affiliation(s)
- Necati Kaplan
- Department of Neurosurgery, Corlu Reyap Hospital, Istanbul Rumeli University, 59680, Tekirdag, Turkey
| | - Ibrahim Yilmaz
- Department of Medical Pharmacology, Istanbul Medipol University School of Medicine, 34810, Istanbul, Turkey
| | - Numan Karaarslan
- Department of Neurosurgery, Namik Kemal University School of Medicine, 59100, Tekirdag, Turkey
| | - Yasin E Kaya
- Department of Orthopedic and Traumatology, Abant Izzet Basal University School of Medicine, 14000, Bolu, Turkey
| | - Duygu Y Sirin
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Namik Kemal University, 59100, Tekirdag, Turkey
| | - Hanefi Ozbek
- Department of Medical Pharmacology, Istanbul Medipol University School of Medicine, 34810, Istanbul, Turkey
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Abstract
Spinal intradural arachnoid cysts (SIACs) are cerebrospinal fluid (CSF) sacs formed by arachnoid membranes. They may be idiopathic or acquired. Treatment is resection, fenestration, or cyst drainage. A 41-year-old female patient presented with myelopathy symptoms and complaints. Magnetic resonance imaging (MRI) revealed a T6-T10 dorsal intradural arachnoid cyst. A T6-T10 laminectomy was performed and an arachnoid cyst was excised under surgical microscope. The cyst contained a clear liquid that was surrounded by a transparent membrane. At 7 weeks postoperatively, the patient experienced severe headache, excessive sleepiness, vomiting, loss of coordination, difficulty walking, and difficulty concentrating. A head computed tomography (CT) scan showed marked ventricular dilation that was diagnosed as delayed hydrocephalus. The patient underwent ventriculoperitoneal shunt (VPS) placement one day after admission. This is a rare condition of hydrocephalus that develops due to CSF leakage after SIAC surgery.
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Affiliation(s)
- Ozkan Ozger
- Istinye University, Faculty of Medicine, Canakkale Anadolu Hospital, Department of Neurosurgery, Canakkale, Turkey
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24
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Kaplan N, Leavitt M, Miller J. A-63 The Fatigue Severity Scale and Depression in an Aging Population. Arch Clin Neuropsychol 2019. [DOI: 10.1093/arclin/acz034.63] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Objective
The Fatigue Severity Scale (FSS) is often used in clinical populations in which fatigue is a common symptom (e.g., multiple sclerosis). Despite the prevalence of fatigue in depression, relatively few investigations have examined the relationship between the FSS and mood symptoms, particularly in aging populations with concerns of memory loss. Thus, the primary aim of the present investigation was to elucidate the relationship between fatigue symptoms and depression among older adults evaluated in a cognitive disorders clinic.
Method
Data were collected as part of a neuropsychological battery administered to patients presenting to clinic due to complaints of memory impairment. Scores on the FSS and the Geriatric Depression Scale (GDS) were collected from 430 patients (48.10% women). Mean age was 74.97 years (SD = 5.81) and 147 subjects were diagnosed with depression, based on a score of 10 or above on the GDS.
Results
We observed a small, but significant inverse relationship between age and scores on the FSS [r = -.103, p = .033], such that older adults endorsed less severe fatigue. A moderate, positive relationship between FSS and GDS was observed [r = .416, p = .000]. Comparing FSS endorsement between depressed and non-depressed individuals finds individuals with depression endorsed significantly greater levels of fatigue than non-depressed individuals, even after accounting for the effects of age [F(1, 427) = 85.79. p < .001; Cohen's d = 0.96].
Conclusion
Present findings suggest that older adults do not necessarily endorse higher rates of fatigue on the FSS. However, the presence of depression in older adults has large effects on fatigue severity.
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Akgun FS, Sirin DY, Yilmaz I, Karaarslan N, Ozbek H, Simsek AT, Kaya YE, Kaplan N, Akyuva Y, Caliskan T, Ates O. Investigation of the effect of dipyrone on cells isolated from intervertebral disc tissue. Exp Ther Med 2019; 18:216-224. [PMID: 31258656 PMCID: PMC6566084 DOI: 10.3892/etm.2019.7576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 02/28/2019] [Indexed: 12/11/2022] Open
Abstract
The present study aimed to evaluate the effects of dipyrone, an indispensable analgesic, anti-pyretic and anti-spasmodic used in emergency departments, on nucleus pulposus and annulus fibrosus cells in vitro. After surgical biopsy, primary cell cultures were prepared from intact intervertebral disc tissues. Dipyrone was administered to the cultures in the experimental groups except for the control group. The data obtained were statistically evaluated. The proliferation was identified to be suppressed via MTT analysis. The gene expression profile of the intervertebral disc cells in the dipyrone-treated groups was significantly changed. The expression of chondroadherin, cartilage oligo matrix protein, interleukin-1β and metalloproteinase (MMP)-19 genes were decreased, but MMP-13 and MMP-7 genes expressions were increased, as determined via reverse transcription-quantitative PCR. AO/PI staining revealed that no apoptotic or other type of cell death was detectable after administration of dipyrone does not mean that the drug is innocuous. The occurrence of cellular senescence and/or the halt of cell proliferation may also be important mechanisms underlying the adverse inhibitory effects of dipyrone. Therefore, prior to administering dipyrone in clinical practice, all possible adverse effects of this drug should be considered.
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Affiliation(s)
- Feride Sinem Akgun
- Department of Emergency Medicine, School of Medicine, Istanbul Maltepe University, Istanbul 34843, Turkey
| | - Duygu Yasar Sirin
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Namik Kemal University, Tekirdag 59100, Turkey
| | - Ibrahim Yilmaz
- Department of Medical Pharmacology, School of Medicine, Istanbul Medipol University, Istanbul 34810, Turkey
| | - Numan Karaarslan
- Department of Neurosurgery, School of Medicine, Namik Kemal University, Tekirdag 59100, Turkey
| | - Hanefi Ozbek
- Department of Medical Pharmacology, School of Medicine, Istanbul Medipol University, Istanbul 34810, Turkey
| | - Abdullah Talha Simsek
- Department of Neurosurgery, School of Medicine, Namik Kemal University, Tekirdag 59100, Turkey
| | - Yasin Emre Kaya
- Department of Orthopedics and Traumatology, School of Medicine, Abant Izzet Baysal University, Bolu 14000, Turkey
| | - Necati Kaplan
- Department of Neurosurgery, Corlu Reyap Hospital, Istanbul Rumeli University, Tekirdag 59680, Turkey
| | - Yener Akyuva
- Department of Neurosurgery, Gaziosmanpasa Taksim Training and Research Hospital, Istanbul 34433, Turkey
| | - Tezcan Caliskan
- Department of Neurosurgery, School of Medicine, Namik Kemal University, Tekirdag 59100, Turkey
| | - Ozkan Ates
- Department of Neurosurgery, Istanbul Koc University Hospital, Istanbul Koc University, Istanbul 34010, Turkey
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Caliskan T, Sirin DY, Karaarslan N, Yilmaz I, Ozbek H, Akyuva Y, Kaplan N, Kaya YE, Simsek AT, Guzelant AY, Ates O. Effects of etanercept, a tumor necrosis factor receptor fusion protein, on primary cell cultures prepared from intact human intervertebral disc tissue. Exp Ther Med 2019; 18:69-76. [PMID: 31258639 PMCID: PMC6566078 DOI: 10.3892/etm.2019.7559] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 02/06/2019] [Indexed: 02/06/2023] Open
Abstract
The aim of the present study was to investigate the effects of etanercept (ETA), a tumor necrosis factor (TNF) inhibitor, on human cell cultures prepared from intact intervertebral disc tissue. ETA is used as a treatment for cases of rheumatoid arthritis, psoriatic arthritis, axial spondyloarthritis and ankylosing spondylitis accompanied by moderate or severe joint pain. ETA was applied to primary cell cultures [annulus fibrosus and nucleus pulposus (NP) from intact intervertebral disc tissue]. Cell cultures without ETA treatment served as the control group. Morphological and quantitative molecular analyses of the two groups were performed. The number of viable cells and cell proliferation decreased in the ETA-treated cultures as compared with those in the control group. Furthermore, in the treatment group, the chondroadherin gene, an NP-specific marker, was not expressed after 24 h. By contrast, the cartilage oligo matrix protein was expressed 24, 48 and 72 h post-ETA treatment, while its expression was significantly lower than that in the control group. In addition, the expression of interleukin-1β, as well as matrix metallopeptidase-7 and −19, was markedly decreased. Overall, the cell proliferation and gene expression in the ETA-treated cells were significantly different from those in the control group (P<0.05). These results suggest that the treatment duration and dosage of TNF inhibitors, which are used to suppress active inflammation, should be considered in the clinical setting. These biological agents may delay the healing of intervertebral disc tissue damage by slowing cell proliferation and altering gene expression via anabolic and catabolic pathways.
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Affiliation(s)
- Tezcan Caliskan
- Department of Neurosurgery, Namik Kemal University School of Medicine, Tekirdag 59100, Turkey
| | - Duygu Yasar Sirin
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Namik Kemal University, Tekirdag 59100, Turkey
| | - Numan Karaarslan
- Department of Neurosurgery, Namik Kemal University School of Medicine, Tekirdag 59100, Turkey
| | - Ibrahim Yilmaz
- Department of Medical Pharmacology, Istanbul Medipol University School of Medicine, Istanbul 34810, Turkey
| | - Hanefi Ozbek
- Department of Medical Pharmacology, Istanbul Medipol University School of Medicine, Istanbul 34810, Turkey
| | - Yener Akyuva
- Department of Neurosurgery, Gaziosmanpasa Taksim Training and Research Hospital, Istanbul 34433, Turkey
| | - Necati Kaplan
- Department of Neurosurgery, Corlu Reyap Hospital, Istanbul Rumeli University, Tekirdag 59680, Turkey
| | - Yasin Emre Kaya
- Department of Orthopedic and Traumatology, Abant Izzet Basal University School of Medicine, Bolu 14000, Turkey
| | - Abdullah Talha Simsek
- Department of Neurosurgery, Namik Kemal University School of Medicine, Tekirdag 59100, Turkey
| | - Aliye Yildirim Guzelant
- Department of Physical Medicine and Rehabilitation, Corlu Reyap Hospital, Istanbul Rumeli University, Tekirdag 59680, Turkey
| | - Ozkan Ates
- Department of Neurosurgery, Esencan Hospital, Istanbul Esenyurt University, Istanbul 34570, Turkey
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Lavker R, Kaplan N, Peng H. 900 Single cell RNA seq (scRNA-seq) defines early and late epithelial transit amplifying (TA) cells. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Peng H, Kaplan N, Yang W, Lavker R. 884 LRRK1 regulates hair follicle (HF) growth via coordinating Wnt and SHH signaling. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Karaarslan N, Yilmaz I, Ozbek H, Sirin DY, Kaplan N, Akyuva Y, Gonultas A, Ates O. Are Specific Gene Expressions of Extracellular Matrix and Nucleus Pulposus Affected by Primary Cell Cultures Prepared from Intact or Degenerative Intervertebral Disc Tissues? Turk Neurosurg 2019; 29:43-52. [PMID: 29484626 DOI: 10.5137/1019-5149.jtn.22210-17.2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AIM To determine the gene expression patterns of nucleus pulposus (NP) in cell cultures obtained from degenerated or intact tissues. MATERIAL AND METHODS Whereas 12 of the cases were diagnosed with lumbar disc herniation and had undergone lumbar microdiscectomy, 12 cases had undergone traumatic intervertebral discectomy and corpectomy, along with discectomy after spinal trauma. NP-specific markers and gene expressions of the reagents of the extracellular matrix in the experimental setup were tested at the 0th, 24th, and 48th hours by quantitative reverse transcriptase polymerase chain reaction (qRT-PCR). Visual evaluations were simultaneously made in all samples using invert and fluorescence microscopy. Vitality and proliferation analyses were evaluated by UV spectrophotometer. As a method of statistical evaluation, Spearman was used for categorical variants, and the Pearson correlation was used for variants with numerical and plain distribution. RESULTS No association was found either between the tissue type and times (r=0.000; p=1.000) or between the region that the tissue was obtained from and hypoxia transcription factor-1 alpha (HIF-1α) gene expression (r=0.098; p=0.245). There was no correlation between cell proliferation and chondroadherin (CHAD) expression or between type II collagen (COL2A1) and CHAD gene expressions. It was found that CHAD and HIF-1α gene expressions and HIF-1α and COL2A1 gene expressions affected cell proliferation. CONCLUSION Cell culture setups are of paramount importance because they may influence the pattern of changes in the gene expressions of the cells used in these setups.
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Affiliation(s)
- Numan Karaarslan
- Namik Kemal University, School of Medicine, Department of Neurosurgery, Tekirdag, Turkey
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Karaarslan N, Yilmaz I, Ozbek H, Yasar Sirin D, Kaplan N, Caliskan T, Ozdemir C, Akyuva Y, Ates O. Are radio-contrast agents commonly used in discography toxic to the intact intervertebral disc tissue cells? Basic Clin Pharmacol Toxicol 2018; 124:181-189. [PMID: 30120906 DOI: 10.1111/bcpt.13112] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 08/13/2018] [Indexed: 11/26/2022]
Abstract
In the literature, there have been no studies showing clear results on how radio-contrast pharmaceuticals would affect intact disc tissue cells. In this context, it was aimed to evaluate the effects of iopromide and gadoxetic acid, frequently used in the discography, on intact lumbar disc tissue in pharmaco-molecular and histopathological level. Primary cell cultures were prepared from the healthy disc tissue of the patients operated in the neurosurgery clinic. Except for the control group, the cultures were incubated with the indicated radio-contrast agents. Cell viability, toxicity and proliferation indices were tested at specific time intervals. The cell viability was quantitatively analysed. It was also visually rechecked under a fluorescence microscope with acridine orange/propidium iodide staining. Simultaneously, cell surface morphology was analysed with an inverted light microscope, while haematoxylin and eosin (H&E) staining methodology was used in the histopathological evaluations. The obtained data were evaluated statistically. Unlike the literature, iopromide or gadoxetic acid did not have any adverse effects on the cell viability, proliferation and toxicity (P < 0.05). Although this study reveals that radio-contrast pharmaceuticals used in the discography, often used in neurosurgical practice, can be safely used, it should be remembered that this study was performed in an in vitro environment.
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Affiliation(s)
- Numan Karaarslan
- Department of Neurosurgery, Namik Kemal University School of Medicine, Tekirdag, Turkey
| | - Ibrahim Yilmaz
- Department of Medical Pharmacology, Istanbul Medipol University School of Medicine, Istanbul, Turkey
| | - Hanefi Ozbek
- Department of Medical Pharmacology, Istanbul Medipol University School of Medicine, Istanbul, Turkey
| | - Duygu Yasar Sirin
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Namik Kemal University, Tekirdag, Turkey
| | - Necati Kaplan
- Department of Neurosurgery, Corlu Reyap Hospital, Istanbul Rumeli University, Tekirdag, Turkey
| | - Tezcan Caliskan
- Department of Neurosurgery, Namik Kemal University School of Medicine, Tekirdag, Turkey
| | - Cigdem Ozdemir
- Department of Pathology, School of Medicine, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - Yener Akyuva
- Department of Neurosurgery, Gaziosmanpasa Taksim Training and Research Hospital, Istanbul, Turkey
| | - Ozkan Ates
- Department of Neurosurgery, Esencan Hospital, Istanbul Esenyurt University, Istanbul, Turkey
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Karaarslan N, Batmaz AG, Yilmaz I, Ozbek H, Caliskan T, Yasar Sirin D, Kaplan N, Oznam K, Ates O. Effect of naproxen on proliferation and differentiation of primary cell cultures isolated from human cartilage tissue. Exp Ther Med 2018; 16:1647-1654. [PMID: 30186383 PMCID: PMC6122143 DOI: 10.3892/etm.2018.6351] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 05/11/2018] [Indexed: 12/16/2022] Open
Abstract
Non-steroidal anti-inflammatory drugs (NSAIDs) that are applied through oral, injectable or topical routes have been widely used in painful and inflammatory musculoskeletal diseases. The current study aimed to determine whether naproxen, an aryl acetic acid derivative with analgesic and anti-inflammatory effects, has a toxic effect on human chondrocytes. Samples containing monolayer primary chondrocyte cultures were prepared following resection from osteochondral tissues obtained from patients with gonarthrosis. Cell viability, toxicity and proliferation and levels of stage-specific embryonic antigen-1, a precursor to human prechondrocytes, were evaluated spectrophotometrically. The results from the untreated control group were compared with those of the study groups, where naproxen was administered in varying doses (1-1,000 µM). Surface morphologies of the cells were compared using inverted light and environmental scanning electron microscopy. Treatment groups were compared by analysis of variance with Tukey's honest difference post hoc test. P<0.01 was considered to indicate a statistically significant difference. The research revealed significant changes to proliferation and differentiation of chondrocytes in all treatment groups (P<0.01). Naproxen was demonstrated to suppress chondrocyte proliferation and differentiation, which may be an important factor to consider when prescribing this medication to patients.
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Affiliation(s)
- Numan Karaarslan
- Department of Neurosurgery, School of Medicine, Namik Kemal University, Tekirdag 59100, Turkey
| | - Ahmet Guray Batmaz
- Department of Orthopaedics and Traumatology, Atasehir Hospital, Istanbul 34384, Turkey
| | - Ibrahim Yilmaz
- Department of Medical Pharmacology, School of Medicine, Istanbul Medipol University, Istanbul 34810, Turkey
| | - Hanefi Ozbek
- Department of Medical Pharmacology, School of Medicine, Istanbul Medipol University, Istanbul 34810, Turkey
| | - Tezcan Caliskan
- Department of Neurosurgery, School of Medicine, Namik Kemal University, Tekirdag 59100, Turkey
| | - Duygu Yasar Sirin
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Namik Kemal University, Tekirdag 59100, Turkey
| | - Necati Kaplan
- Department of Neurosurgery, Istanbul Rumeli University, Corlu Reyap Hospital, Tekirdag 59100, Turkey
| | - Kadir Oznam
- Department of Orthopaedics and Traumatology, School of Medicine, Istanbul Medipol University, Istanbul 34214, Turkey
| | - Ozkan Ates
- Department of Neurosurgery, Istanbul Esenyurt University, Esencan Hospital, Istanbul 34510, Turkey
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Karaarslan N, Yilmaz I, Sirin DY, Ozbek H, Kaplan N, Kaya YE, Akyuva Y, Gurbuz MS, Oznam K, Ates O. Pregabalin treatment for neuropathic pain may damage intervertebral disc tissue. Exp Ther Med 2018; 16:1259-1265. [PMID: 30112057 PMCID: PMC6090477 DOI: 10.3892/etm.2018.6289] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 03/23/2018] [Indexed: 12/22/2022] Open
Abstract
The aim of the present study was to determine whether pharmaceutical preparations with pregabalin (PGB) as an active ingredient, which are widely prescribed by clinicians, exert toxic effects on human primary nucleus pulposus (NP) and annulus fibrosis (AF). Primary human cell cultures were obtained from intact (n=6) and degenerated (n=6) tissues resected from the two groups of patients. Different doses of PGB were applied to these cultures and cells were subjected to molecular analyses at 0, 24 and 48 h. Cell vitality, toxicity and proliferation were assessed using a spectrophotometer. The expression of chondroadherin (CHAD), a (member of the NP-specific protein family), hypoxia-inducible factor-1α (HIF-1α) and type II collagen (COL2A1) was measured using reverse transcription-quantitative polymerase chain reaction. The results revealed that cell intensity increased in a time-dependent manner and cell vitality continued in the cultures without pharmaceuticals. Cell proliferation was suppressed in the PGB-treated cultures independent from the dose and duration of application. PGB was demonstrated to suppress the expression of CHAD and HIF-1α. In contrast, COL2A1 gene expression was not revealed in any experimental group. The present study utilized an in vitro model and the PGB active ingredient used herein may not be representative of clinical applications; however, the results demonstrated that PGB has a toxic effect on NP/AF cell cultures containing primary human intervertebral disc tissue. In summary, the use of pharmacological agents containing PGB may suppress the proliferation and differentiation of NP/AF cells and/or tissues, which should be considered when deciding on an appropriate treatment regime.
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Affiliation(s)
- Numan Karaarslan
- Department of Neurosurgery, Namik Kemal University School of Medicine, Tekirdag 59100, Turkey
| | - Ibrahim Yilmaz
- Department of Medical Pharmacology, Istanbul Medipol University School of Medicine, Istanbul 34810, Turkey
| | - Duygu Yasar Sirin
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Namik Kemal University, Tekirdag 59030, Turkey
| | - Hanefi Ozbek
- Department of Medical Pharmacology, Istanbul Medipol University School of Medicine, Istanbul 34810, Turkey
| | - Necati Kaplan
- Department of Neurosurgery, Istanbul Rumeli University, Corlu Reyap Hospital, Tekirdag 59860, Turkey
| | - Yasin Emre Kaya
- Department of Orthopedic and Traumatology, Abant Izzet Basal University School of Medicine, Bolu 14000, Turkey
| | - Yener Akyuva
- Department of Neurosurgery, Gaziosmanpasa Taksim Training and Research Hospital, Istanbul 34433, Turkey
| | - Mehmet Sabri Gurbuz
- Department of Neurosurgery, Istanbul Medeniyet University School of Medicine, Istanbul 34730, Turkey
| | - Kadir Oznam
- Department of Orthopedic and Traumatology, Istanbul Medipol University School of Medicine, Istanbul 34214, Turkey
| | - Ozkan Ates
- Department of Neurosurgery, Istanbul Esenyurt University, Esencan Hospital, Istanbul 34517, Turkey
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Cable C, Kaplan N, Balu A, Bhatt S, Sia M, Perez White B. 860 EGFR proteomics reveals novel EphA2-dependent trafficking and signaling pathways in epidermal keratinocytes. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Akyuva Y, Kaplan N, Yilmaz I, Ozbek H, Sirin DY, Karaaslan N, Guler O, Ates O. Delivering Growth Factors through a Polymeric Scaffold to Cell Cultures Containing both Nucleus Pulposus and Annulus Fibrosus. Turk Neurosurg 2018; 29:180-193. [PMID: 29694659 DOI: 10.5137/1019-5149.jtn.22672-18.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
AIM To design a novel, polyvinyl alcohol (PVA)-based polymeric scaffold that permits the controlled release of insulin-like growth factor 1 (IGF-1)/bone morphogenetic protein (BMP)-2 following intervertebral disc administration. MATERIAL AND METHODS The drug delivery system was composed of two different solutions that formed a scaffold within seconds of coming into contact with each other. Swelling, pH, and temperature tests and analysis of the controlled release of growth factors (GFs) from this system were performed. The release kinetics of the GFs were determined through enzyme-linked immunosorbent assay (ELISA). Cell proliferation and viability were monitored with microscopy and analyzed using an MTT assay and acridine orange/propidium iodide (AO/PI) staining. Chondroadherin (CHAD), hypoxia inducible factor-1 alpha (HIF-1?), and collagen type II (COL2A1) gene expressions were determined with quantitative real-time polymerase chain reaction (qRT-PCR) analysis to show the effects of IGF-1/BMP-2 administration on annulus fibrosus cell (AFC)/nucleus pulposus cell (NPC) cultures. For the statistical evaluation of the obtained data, experimental groups were compared with a post hoc Tukey's test following an analysis of variance. RESULTS The scaffold allowed for the controlled release of IGF-1 and BMP-2 in different time intervals. It was observed that as the application time increased, the number of cells and the degree of extracellular matrix development increased in AFC/NPC cultures. AO/PI staining and an MTT analysis showed that cells retained their specific morphology and continued to proliferate. It was observed that HIF-1? and CHAD expression increased in a time-dependent manner, and no COL2A1 expression in the AFC/ NPC cultures was observed. CONCLUSION The designed scaffold may be used as an alternative method for intervertebral disc administration of GFs after further in vivo studies. Such prototype scaffolds may be an innovative technology in targeted drug therapies after reconstructive neurosurgical interventions.
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Affiliation(s)
- Yener Akyuva
- Gaziosmanpasa Taksim Training and Research Hospital, Neurosurgery Clinic, Istanbul, Turkey
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Sirin DY, Kaplan N, Yilmaz I, Karaarslan N, Ozbek H, Akyuva Y, Kaya YE, Oznam K, Akkaya N, Guler O, Akkaya S, Mahirogullari M. The association between different molecular weights of hyaluronic acid and CHAD, HIF-1α, COL2A1 expression in chondrocyte cultures. Exp Ther Med 2018; 15:4205-4212. [PMID: 29849772 PMCID: PMC5962858 DOI: 10.3892/etm.2018.5943] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 01/10/2018] [Indexed: 01/06/2023] Open
Abstract
The aim of the present study was to investigate the effects of three different formulations of hyaluronic acid (HA): Low molecular weight (MW) Sinovial One®, medium MW Viscoplus® and high MW Durolane®, on chondrocyte proliferation and collagen type II (COL2A1), hypoxia-inducible factor 1α (HIF-1α) and chondroadherin (CHAD) expression in primary chondrocyte cultures. Standard primary chondrocyte cultures were established from osteochondral tissues surgically obtained from 6 patients with gonarthrosis. Cell morphology was evaluated using an inverted light microscope; cell proliferation was determined with a MTT assay and confirmed with acridine orange/propidium iodide staining. Levels of CHAD, COL2A1 and HIF-1α expression were assessed using specific TaqMan gene expression assays. The results demonstrated the positive effect of HA treatment on cell proliferation, which was independent from the MW. COL2A1 expression increased in the medium and high MW HA treated groups. It was observed that HIF-1α expression increased in the high MW treated group alone. CHAD expression increased only in the medium MW HA treated group. Evaluation of gene expression revealed that levels of expression increased as the duration of HA application increased, in the medium and high MW HA treated groups. In terms of increased viability and proliferation, a longer duration of HA application was more effective. Taken together, it may be concluded that the administration of medium and high MW HA may be a successful way of treating diseases affecting chondrocytes in a clinical setting.
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Affiliation(s)
- Duygu Yasar Sirin
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Namik Kemal University, Tekirdag 59030, Turkey
| | - Necati Kaplan
- Department of Neurosurgery, Istanbul Rumeli University, Tekirdag 59680, Turkey
| | - Ibrahim Yilmaz
- Department of Medical Pharmacology, Istanbul Medipol University School of Medicine, Istanbul 34810, Turkey
| | - Numan Karaarslan
- Department of Neurosurgery, Namik Kemal University School of Medicine, Tekirdag 59060, Turkey
| | - Hanefi Ozbek
- Department of Medical Pharmacology, Istanbul Medipol University School of Medicine, Istanbul 34810, Turkey
| | - Yener Akyuva
- Department of Neurosurgery, Gaziosmanpasa Taksim Training and Research Hospital, Istanbul 34433, Turkey
| | - Yasin Emre Kaya
- Department of Orthopedics and Traumatology, Abant Izzet Baysal University School of Medicine, Bolu 14000, Turkey
| | - Kadir Oznam
- Department of Orthopedics and Traumatology, Istanbul Medipol University School of Medicine, Istanbul 34214, Turkey
| | - Nuray Akkaya
- Department of Physical Medicine and Rehabilitation, Pamukkale University School of Medicine, Denizli 20070, Turkey
| | - Olcay Guler
- Department of Orthopedics and Traumatology, Medical Park Health Group, Istanbul 34180, Turkey
| | - Semih Akkaya
- Department of Orthopedics and Traumatology, Denizli Private Hospital, Denizli 20070, Turkey
| | - Mahir Mahirogullari
- Department of Orthopedics and Traumatology, Memorial Health Group, Istanbul 34758, Turkey
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Xing X, Sarkar M, Tsoi A, Kaplan N, Liang Y, Hoover P, Voorhees J, Nair R, Elder J, Budunova I, Getsios S, Gudjonsson J. 040 Metabolomic profiling of psoriasis skin reveals localized cortisol deficiency resulting in maintenance of inflammatory state and disruption of epidermal differentiation. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.02.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Abstract
A Bellman–Harris process is considered where the population is subjected to disasters which occur at random times. Each particle alive at the time of a disaster survives it with probability p. In the situation when explosion can occur, several limit theorems are proven. In particular, we prove that the age-distribution converges to the same stable distribution as the Bellman-Harris process and that the population size continues to be asymptotically exponential.
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Zheng J, Perez White B, Kaplan N, Petty A, Zhao Z, Honda K, Denning M, Blumenberg M, Getsios S, Wang B. 075 Ephrin-A loss in cutaneous squamous cell carcinoma progression and metastasis. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Okmen K, Dagistan Y, Dagistan E, Kaplan N, Cancan E. Efficacy of the greater occipital nerve block in recurrent migraine type headaches. Neurol Neurochir Pol 2016; 50:151-4. [DOI: 10.1016/j.pjnns.2016.01.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 01/27/2016] [Accepted: 01/28/2016] [Indexed: 10/22/2022]
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Dizmen A, Yazıcı O, Kocer A, Kaplan N, Ertan F. EP-1695: Dosimetric comparison of Helical Tomotherapy and VMAT for endometrial cancer. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32946-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Berger AH, Imielinski M, Duke F, Wala J, Kaplan N, Shi GX, Andres DA, Meyerson M. Oncogenic RIT1 mutations in lung adenocarcinoma. Oncogene 2014; 33:4418-23. [PMID: 24469055 PMCID: PMC4150988 DOI: 10.1038/onc.2013.581] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 11/25/2013] [Accepted: 12/03/2013] [Indexed: 12/27/2022]
Abstract
Lung adenocarcinoma is comprised of distinct mutational subtypes characterized by mutually exclusive oncogenic mutations in RTK/RAS pathway members KRAS, EGFR, BRAF and ERBB2, and translocations involving ALK, RET and ROS1. Identification of these oncogenic events has transformed the treatment of lung adenocarcinoma via application of therapies targeted toward specific genetic lesions in stratified patient populations. However, such mutations have been reported in only ∼55% of lung adenocarcinoma cases in the United States, suggesting other mechanisms of malignancy are involved in the remaining cases. Here we report somatic mutations in the small GTPase gene RIT1 in ∼2% of lung adenocarcinoma cases that cluster in a hotspot near the switch II domain of the protein. RIT1 switch II domain mutations are mutually exclusive with all other known lung adenocarcinoma driver mutations. Ectopic expression of mutated RIT1 induces cellular transformation in vitro and in vivo, which can be reversed by combined PI3K and MEK inhibition. These data identify RIT1 as a driver oncogene in a specific subset of lung adenocarcinomas and suggest PI3K and MEK inhibition as a potential therapeutic strategy in RIT1-mutated tumors.
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Affiliation(s)
- A H Berger
- 1] Cancer Program, The Broad Institute of Harvard and M.I.T., 7 Cambridge Center, Cambridge, MA, USA [2] Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA, USA
| | - M Imielinski
- 1] Cancer Program, The Broad Institute of Harvard and M.I.T., 7 Cambridge Center, Cambridge, MA, USA [2] Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA, USA [3] Department of Pathology, Massachusetts General Hospital, Boston, MA, USA [4] Department of Pathology, Harvard Medical School, Boston, MA, USA
| | - F Duke
- Cancer Program, The Broad Institute of Harvard and M.I.T., 7 Cambridge Center, Cambridge, MA, USA
| | - J Wala
- 1] Cancer Program, The Broad Institute of Harvard and M.I.T., 7 Cambridge Center, Cambridge, MA, USA [2] Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA, USA [3] Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - N Kaplan
- Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA, USA
| | - G-X Shi
- Department of Molecular and Cellular Biochemistry, University of Kentucky College of Medicine, Lexington, KY, USA
| | - D A Andres
- Department of Molecular and Cellular Biochemistry, University of Kentucky College of Medicine, Lexington, KY, USA
| | - M Meyerson
- 1] Cancer Program, The Broad Institute of Harvard and M.I.T., 7 Cambridge Center, Cambridge, MA, USA [2] Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA, USA [3] Department of Pathology, Harvard Medical School, Boston, MA, USA
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Inzelberg R, Cohen OS, Aharon-Peretz J, Schlesinger I, Gershoni-Baruch R, Djaldetti R, Nitsan Z, Ephraty L, Tunkel O, Kozlova E, Inzelberg L, Kaplan N, Fixler Mehr T, Mory A, Dagan E, Schechtman E, Friedman E, Hassin-Baer S. The LRRK2 G2019S mutation is associated with Parkinson disease and concomitant non-skin cancers. Neurology 2012; 78:781-6. [PMID: 22323743 DOI: 10.1212/wnl.0b013e318249f673] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE In view of the fact that cancer patterns in patients with Parkinson disease (PD) differ from the general population, we aimed to verify whether patients with PD with LRRK2 mutations have an increased risk for particular cancer types. METHODS In this cross-sectional study, eligible consenting Jewish patients with PD were genotyped for the predominant LRRK2 G2019S mutation. Oncologic data were obtained by personal interview and reviewing patients' files. Stepwise logistic regression was applied to model the probability of cancer occurrence in carriers vs noncarriers. RESULTS Overall, 79/490 (16.1%) genotyped patients carried the G2019S mutation. Seventy-seven (16%) were diagnosed with cancer; of those, 67 (14%) with a non-skin cancer. Eighteen (23%) carriers vs 49 (12%) noncarriers had a non-skin cancer (p = 0.01, odds ratio [OR] = 2.18, 95% confidence interval [CI] 1.19-3.99). A significant ethnicity effect was noted (p = 0.045, OR = 1.84, 95% CI 1.02-3.34). Among Ashkenazi patients, age and LRRK2 emerged as significant using stepwise logistic regression including age, gender, and LRRK2 status as explanatory variables. The OR for LRRK2 mutation carriers adjusted for age was 3.38 (95% CI 1.64-6.97, p = 0.0009). CONCLUSIONS Ashkenazi Jewish patients with PD who harbor the G2019S LRRK2 mutation are more likely to have a concomitant non-skin cancer than noncarriers.
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Affiliation(s)
- R Inzelberg
- Parkinson’s Disease and Movement Disorders Clinic, the Sagol Neuroscience Center, Department of Neurology, Israel.
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Hassin S, Kaplan N, Cohen O, Vituri A, Inzelberg R, Yahalom G, Nitzan Z, Efraty L, Tunkel O, Friedman E, Rosset S, Korczyn A. 3.051 POLYMORPHISMS IN THE SLC6A3 GENE ENCODING FOR THE DOPAMINE TRANSPORTER ARE ASSOCIATED WITH LEVODOPA-INDUCED DYSKINESIA IN PARKINSON'S DISEASE. Parkinsonism Relat Disord 2012. [DOI: 10.1016/s1353-8020(11)70787-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Yahalom G, Kaplan N, Vituri A, Cohen O, Inzelberg R, Strauss H, Kozlova E, Orlev Y, Korczyn A, Rosset S, Hassin-Baer S. 3.049 LEVODOPA-INDUCED DYSKINESIA IN PARKINSON'S DISEASE PATIENTS CARRYING THE LEUCINE-RICH REPEAT KINASE 2 (LRRK2) G2019S MUTATION. Parkinsonism Relat Disord 2012. [DOI: 10.1016/s1353-8020(11)70785-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Feyerherm R, Amato A, Grayevsky A, Gygax FN, Kaplan N, Schenck A. Crystal electric field next to a hydrogen-like interstitial— µ+ in PrNi5. ACTA ACUST UNITED AC 2007. [DOI: 10.1007/s002570050002] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Nixon A, Allen J, Miller E, Savage S, Kaplan N, Starr M, Bendell J, Uronis H, Fernando N, Hurwitz H. Clinical evaluation of nitric oxide responses to anti-VEGF therapy with bevacizumab. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.14039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
14039 Background: Anti-vascular endothelial growth factor (anti-VEGF) therapy has been linked to hypertension (HTN) and arterial thrombo-embolic events that may involve changes in nitric oxide (NO) bioavailability. Methods: 25 patients (pts) with advanced cancer, normal renal function and blood pressure (BP), no increased risks for anti-VEGF toxicities, and not on medications known to confound biomarker studies (including anti-hypertensives) were treated with bevacizumab (BV) 15mg/kg d1, then 10mg/kg q2 week. Prior to biomarker assessment, all patients were placed on a calorie-, nitrate-, and salt-restricted diet for 72 hr. All measures were taken pre-treatment (preRx) and on day 28 of treatment (onRx). Dependant variables included; a) Brachial artery reactivity (BAR) following hyperemic flow stimulus (endothelium-dependent) and sub-lingual nitroglycerine (NTG; endothelium-independent); b) exhaled and plasma/urine total NO2/NO3 using chemiluminescence (Sievers 280NOA) with either KI or VCl3 in HCl as the reductants; c) blood pressure. Additionally, we measured multiple regulators of vascular tone and injury. Comparisons were analyzed using Spearman signed rank tests. Results: Of 25 pts (16 F, 9 M) treated, 21 patients were fully evaluable. Significant changes or strong trends were observed upon comparing preRx vs. onRx for BP (SBP +12.4, DBP +5.6, MAP +7.9 mm Hg), and flow-mediated BAR (-2.0%) with no changes in hyperemic flow/shear stimulus or smooth muscle function (BAR NTG), indicating a decrease in brachial artery endothelial responsiveness. Exhaled NO decreased (-0.8% d1vs d28 and -0.6% pre/post infusion day1). Measurement and data analysis of urinary/plasma NO2/NO3, as well as angiogenic markers, are almost complete and will be reported. Conclusions: After one month of treatment, BV increased BP and decreased endothelium- dependent BAR and exhaled NO, suggesting potentially broad, mechanism-based effects on NO bioavailability in patients. [Table: see text]
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Affiliation(s)
- A. Nixon
- Duke University Medical Center, Durham, NC; Georgia Cancer Specialists, Cumming, GA
| | - J. Allen
- Duke University Medical Center, Durham, NC; Georgia Cancer Specialists, Cumming, GA
| | - E. Miller
- Duke University Medical Center, Durham, NC; Georgia Cancer Specialists, Cumming, GA
| | - S. Savage
- Duke University Medical Center, Durham, NC; Georgia Cancer Specialists, Cumming, GA
| | - N. Kaplan
- Duke University Medical Center, Durham, NC; Georgia Cancer Specialists, Cumming, GA
| | - M. Starr
- Duke University Medical Center, Durham, NC; Georgia Cancer Specialists, Cumming, GA
| | - J. Bendell
- Duke University Medical Center, Durham, NC; Georgia Cancer Specialists, Cumming, GA
| | - H. Uronis
- Duke University Medical Center, Durham, NC; Georgia Cancer Specialists, Cumming, GA
| | - N. Fernando
- Duke University Medical Center, Durham, NC; Georgia Cancer Specialists, Cumming, GA
| | - H. Hurwitz
- Duke University Medical Center, Durham, NC; Georgia Cancer Specialists, Cumming, GA
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Banevicius M, Kaplan N, Vaughan D, Nicolau D. O455 Comparative dose studies of API-1252 and linezolid against hospital-acquired and community-acquired methicillin-resistant Staphylococcus aureus in a murine thigh model. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)70303-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Drescher M, Kaplan N, Dormann E. Conduction-electron drift velocity measurement via electron spin resonance. Phys Rev Lett 2006; 96:037601. [PMID: 16486771 DOI: 10.1103/physrevlett.96.037601] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2005] [Indexed: 05/06/2023]
Abstract
In analogy with NMR, motion induced phase shift of pulsed ESR signals enables in principle the direct detection of electron drift velocity or electronic current, respectively. Overcoming the difficulties with additional magnetic field gradients induced by the current itself, we succeeded in demonstrating the detection of electron flow via ESR. Measuring the electron drift velocity in the organic conductor (fluoranthene)2PF6 the microscopic Ohmic law could be observed in a current range of more than +/-0.25 A.
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Affiliation(s)
- M Drescher
- Physikalisches Institut, Universität Karlsruhe(TH) D-76128 Karlsruhe, Germany.
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Drescher M, Kaplan N, Dormann E. Zebralike patterned organic conductor with periodic modulation of mobility and Peierls transition. Phys Rev Lett 2005; 94:016404. [PMID: 15698107 DOI: 10.1103/physrevlett.94.016404] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2004] [Indexed: 05/24/2023]
Abstract
We manipulated the defect concentration in a (fluoranthene)2PF6 crystal by proton irradiation through a periodic grid, resulting in a striped defect pattern. Spatially resolved pulsed X-band ESR analysis was used to quantify the resulting local defect concentrations, spin diffusion coefficients, and electron spin concentrations. The temperature dependence of the data proves that spin diffusion coefficient and Peierls transition can be tailored in a controlled way via the defect concentrations.
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Affiliation(s)
- M Drescher
- Physikalisches Institut, Universität Karlsruhe (TH), D-76128 Karlsruhe, Germany.
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