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Roguin N, Dahan S, Reiner-Benaim A, Laish-Farkash A, Yahud E, Kogan Y, Vasilenko L, Lev EI, Ben-Assa E. Correlation between baseline immature platelets fraction levels and peak troponin in patients with acute myocardial infarction. Coron Artery Dis 2024; 35:44-49. [PMID: 37990534 DOI: 10.1097/mca.0000000000001302] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
INTRODUCTION Elevated peak cardiac troponin levels have been linked with increased morbidity and mortality in patients with acute myocardial infarction (AMI). Immature Platelets are young and relatively large platelets that are hyper-reactive and pro-thrombotic compared to regular platelets. Increased immature platelet fraction (IPF) has been associated with an elevated risk of thrombotic events. We hypothesize that patients with higher IPF levels during AMI, will experience a more severe infarct, leading to elevated peak troponin levels. METHODS Clinical data from patients admitted to the cardiology division between 2018 and 2022, who were diagnosed with AMI and underwent an IPF testing. Univariate and multivariate regression analyses were performed to identify predictors of elevated peak troponin. RESULTS Among the 277 patients diagnosed with AMI who underwent IPF testing, 113 had (STEMI) and 164 had (NSTEMI). The median value of IPF of 4.2% was used as the threshold for defining elevated IPF. Notably, among STEMI patients, those with IPF ≥ 4.2% had significantly higher peak troponin levels ( P = 0.021). Conversely, no significant difference in peak troponin levels was observed among NSTEMI patients ( P = 0.348). Multivariate analysis identified patients with STEMI in the higher IPF group as one of the significant predictors for elevated peak troponin levels. CONCLUSION This study revealed a correlation between higher baseline IPF levels and increased peak troponin levels specifically in STEMI patients, while no such association was found in NSTEMI patients. Incorporating IPF levels above the median into risk stratification scores for STEMI patients may provide valuable support for adopting a more proactive therapeutic approach.
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Affiliation(s)
- Nir Roguin
- Ben-Gurion University of the Negev, Joyce and Irving Goldman Medical School, Faculty of Health Sciences, Beer Sheva
| | - Shani Dahan
- Cardiology Division, Assuta Ashdod University Hospital, Ben-Gurion University of the Negev, Ashdod
| | - Anat Reiner-Benaim
- Department of Epidemiology, Biostatistics and Community Health Sciences, School of Public Health, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheba, Israel
| | - Avishag Laish-Farkash
- Cardiology Division, Assuta Ashdod University Hospital, Ben-Gurion University of the Negev, Ashdod
| | - Ella Yahud
- Cardiology Division, Assuta Ashdod University Hospital, Ben-Gurion University of the Negev, Ashdod
| | - Yonatan Kogan
- Cardiology Division, Assuta Ashdod University Hospital, Ben-Gurion University of the Negev, Ashdod
| | - Luba Vasilenko
- Cardiology Division, Assuta Ashdod University Hospital, Ben-Gurion University of the Negev, Ashdod
| | - Eli I Lev
- Cardiology Division, Assuta Ashdod University Hospital, Ben-Gurion University of the Negev, Ashdod
| | - Eyal Ben-Assa
- Cardiology Division, Assuta Ashdod University Hospital, Ben-Gurion University of the Negev, Ashdod
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Laish-Farkash A, Harari E, Rahkovich M, Kogan Y, Marincheva G, Scheinman G, Ben-Assa E, Lev EI. A novel robotic radiation shielding device for electrophysiologic procedures: A prospective study. Am Heart J 2023; 261:127-136. [PMID: 37225386 DOI: 10.1016/j.ahj.2023.03.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 03/04/2023] [Accepted: 03/15/2023] [Indexed: 05/26/2023]
Abstract
BACKGROUND A robotic Radiaction Shielding System (RSS) was developed to provide a full-body protection to all medical personnel during fluoroscopy-guided procedures, by encapsulating the imaging beam and blocking scattered radiation. OBJECTIVES We aimed to evaluate its efficacy in real-world electrophysiologic (EP) laboratory- both during ablations and cardiovascular implantable electronic devices (CIED) procedures. METHODS A prospective controlled study comparing consecutive real-life EP procedures with and without RSS using highly sensitive sensors in different locations. RESULTS Thirty-five ablations and 19 CIED procedures were done without RSS installed and 31 ablations and 24 CIED procedures (17 with usage levels ≥70%) were done with RSS. Overall, there was 95% average usage level for ablations and 88% for CIEDs. For all procedures with ≥70% usage level and for all sensors, the radiation with RSS was significantly lower than radiation without RSS. For ablations, there was 87% reduction in radiation with RSS (76%-97% for different sensors). For CIEDs, there was 83% reduction in radiation with RSS (59%-92%). RSS usage did not increase procedure time and radiation time. User feedback showed a high-level of integration in the clinical workflow and safety profile for all types of EP procedures. CONCLUSIONS For both CIED and ablation procedures the radiation with RSS was significantly lower than without RSS. Higher usage level brings higher reduction rates. Thus, RSS may have an important role in full-body protection to all medical personnel from scattered radiation during EP and CIED procedures. Until more data is available, it is recommended to maintain existing standard shielding.
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Affiliation(s)
- Avishag Laish-Farkash
- Department of Cardiology, Assuta Ashdod University MC, Ben-Gurion University of the Negev, Ashdod, Israel.
| | - Emanuel Harari
- Department of Cardiology, Assuta Ashdod University MC, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Michael Rahkovich
- Department of Cardiology, Assuta Ashdod University MC, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Yonatan Kogan
- Department of Cardiology, Assuta Ashdod University MC, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Gergana Marincheva
- Department of Cardiology, Assuta Ashdod University MC, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Guy Scheinman
- Department of Cardiology, Assuta Ashdod University MC, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Eyal Ben-Assa
- Department of Cardiology, Assuta Ashdod University MC, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Eli I Lev
- Department of Cardiology, Assuta Ashdod University MC, Ben-Gurion University of the Negev, Ashdod, Israel
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Perelshtein Brezinov O, Vorotilina N, Vasilenko L, Kogan Y, Lev EI, Laish-Farkash A. Coronary artery disease among patients admitted with atrial fibrillation and chest pain. Coron Artery Dis 2023; 34:96-101. [PMID: 36515228 DOI: 10.1097/mca.0000000000001206] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Patients who present to the emergency department with chest pain during an episode of atrial fibrillation (AF) impose a clinical challenge regarding the source of pain - being coronary artery disease (CAD) or AF in origin. The aim of this study was to identify clinical, imaging or laboratory markers which can predict significant CAD among patients with an AF episode and chest pain. METHODS We included 57 consecutive patients admitted to our hospital with AF and chest pain. All patients underwent coronary evaluation. Significant CAD was defined as >50% stenosis in a major coronary artery by coronary angiography or cardiac CT. We compared CAD and non-CAD groups and analyzed risk factorsby regression analysis. RESULTS Twenty-four patients (42%) were diagnosed with- and 33 patients (58%) without obstructive CAD. In a multivariate analysis of regional wall motion abnormality (RWMA), elevated troponin and hypertension were found to be predictors for CAD [odds ratio (OR), 22.4 (confidence interval (CI), 1.8-272.4; P = 0.02); OR, 5.6 (CI, 1-31.0; P = 0.05) and OR, 21.4 (CI, 1.6-284.6; P = 0.02), respectively]. There were no significant differences regarding the rate of typical chest pain at presentation in the CAD vs. the non-CAD group [13 (54%) vs. 20 (60%), P = 0.374], or in ECG ST-changes [12 (50%) vs.9 (27%), respectively; P = 0.08]. CONCLUSION In patients who present acutely with chest pain and AF, troponin elevation and RWMA appear to be highly predictive of obstructive CAD, whereas clinical symptoms and ECG changes are not predictive. These findings may be helpful for guiding the management of patients admitted with AF and chest pain.
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Affiliation(s)
- Olga Perelshtein Brezinov
- Cardiology Department, Samson Assuta Ashdod University Medical Center, Ashdod, and Ben Gurion University of the Negev, Israel
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Laish-Farkash A, Harari E, Finkelstein A, Sheinman G, Rahkovich M, Kogan Y, Lev EI. A novel robotic radiation shielding device for interventional cardiology procedures. EUROINTERVENTION 2022; 18:262-266. [PMID: 35094972 PMCID: PMC9912971 DOI: 10.4244/eij-d-21-00577] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Avishag Laish-Farkash
- Cardiology Department, Assuta Ashdod University Medical Center, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Emanuel Harari
- Cardiology Department, Assuta Ashdod University Medical Center, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Ariel Finkelstein
- Cardiology Department, Tel Aviv Sourasky Medical Center, Tel Aviv University, Tel Aviv, Israel
| | - Guy Sheinman
- Cardiology Department, Assuta Ashdod University Medical Center, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Michael Rahkovich
- Cardiology Department, Assuta Ashdod University Medical Center, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Yonatan Kogan
- Cardiology Department, Assuta Ashdod University Medical Center, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Eli Israel Lev
- Cardiology Department, Assuta Ashdod University Medical Center, Ha-Refu'a St 7, Ashdod 7747629, Israel
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Marincheva G, Levi T, Perelshtein Brezinov O, Valdman A, Rahkovich M, Kogan Y, Laish-Farkash A. Echocardiography-guided Cardiac Implantable Electronic Device Implantation to Reduce Device Related Tricuspid Regurgitation: A Prospective Controlled Study. Isr Med Assoc J 2022; 24:25-32. [PMID: 35077042] [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: 06/14/2023]
Abstract
BACKGROUND Endocardial leads of permanent pacemakers (PPM) and implantable defibrillators (ICD) across the tricuspid valve (TV) can lead to tricuspid regurgitation (TR) or can worsen existing TR with subsequent severe morbidity and mortality. OBJECTIVES To evaluate prospectively the efficacy of intraprocedural 2-dimentional-transthoracic echocardiography (2DTTE) in reducing/preventing lead-associated TR. METHODS We conducted a prospective randomized controlled study comparing echocardiographic results in patients undergoing de-novo PPM/ICD implantation with intraprocedural echo-guided right ventricular (RV) lead placement (Group 1, n=56) versus non-echo guided implantation (Group 2, n=55). Lead position was changed if TR grade was more than baseline in Group 1. Cohort patients underwent 2DTTE at baseline and 3 and/or 6 months after implantation. Excluded were patients with baseline TR > moderate or baseline ≥ moderate RV dysfunction. RESULTS The study comprised 111 patients (74.14 ± 11 years of age, 58.6% male, 19% ICD, 42% active leads). In 98 patients there was at least one follow-up echo. Two patients from Group 1 (3.6%) needed intraprocedural RV electrode repositioning. Four patients (3.5%, 2 from each group, all dual chamber PPM, 3 atrial fibrillation, 2 RV pacing > 40%, none with intraprocedural reposition) had TR deterioration during 6 months follow-up. One patient from Group 2 with baseline mild-moderate aortic regurgitation (AR) had worsening TR and AR within 3 months and underwent aortic valve replacement and TV repair. CONCLUSIONS The rate of mechanically induced lead-associated TR is low; thus, a routine intraprocedural 2DTTE does not have a significant role in reducing/preventing it.
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Affiliation(s)
- Gergana Marincheva
- Electrophysiology and Pacing Unit, Department of Cardiology, Assuta Ashdod University Medical Center Ben Gurion University of the Negev, Beer Sheva, Israel
| | - Tal Levi
- Electrophysiology and Pacing Unit, Department of Cardiology, Assuta Ashdod University Medical Center Ben Gurion University of the Negev, Beer Sheva, Israel
| | - Olga Perelshtein Brezinov
- Electrophysiology and Pacing Unit, Department of Cardiology, Assuta Ashdod University Medical Center Ben Gurion University of the Negev, Beer Sheva, Israel
| | - Andrei Valdman
- Electrophysiology and Pacing Unit, Department of Cardiology, Assuta Ashdod University Medical Center Ben Gurion University of the Negev, Beer Sheva, Israel
| | - Michael Rahkovich
- Electrophysiology and Pacing Unit, Department of Cardiology, Assuta Ashdod University Medical Center Ben Gurion University of the Negev, Beer Sheva, Israel
| | - Yonatan Kogan
- Electrophysiology and Pacing Unit, Department of Cardiology, Assuta Ashdod University Medical Center Ben Gurion University of the Negev, Beer Sheva, Israel
| | - Avishag Laish-Farkash
- Electrophysiology and Pacing Unit, Department of Cardiology, Assuta Ashdod University Medical Center Ben Gurion University of the Negev, Beer Sheva, Israel
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Brezinov OP, Sevilya Z, Yahud E, Rahkovich M, Kogan Y, Marincheva G, Kakzanov Y, Lev E, Laish-Farkash A. Comparison of Immature Platelet Fraction and Factors Associated with Inflammation, Thrombosis and Platelet Reactivity Between Left and Right Atria in Patients with Atrial Fibrillation. J Atr Fibrillation 2021; 13:2459. [PMID: 34950336 DOI: 10.4022/jafib.2459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 12/25/2020] [Accepted: 01/18/2021] [Indexed: 11/10/2022]
Abstract
Background Recent trials found poor temporal relationship between atrial fibrillation (AF) episodes and strokes. Thus, stroke in AF patients probably involves more mechanisms than cardiac embolism. We compared factors of inflammation, thrombosis and platelet reactivity between left (LA) and right atria (RA) and femoral vein (FV) in patients with AF. Methods Blood samples were collected from patients undergoing AF-ablation from the FV, RA and LA for neutrophil to lymphocyte ratio (NLR), immature platelet fraction (IPF) and count (IPC), CD40 ligand, P-selectin and E-Selectin. IPF was measured by an autoanalyzer; CD40 ligand, P-selectin, and E-Selectin were measured by ELISA and NLR was calculated from complete blood counts. Results Sixty-seven patients were included (age 65±10y, 63% male, CHA2DS2-VASc score 2.8±1.8, LA volume index 40±24 mL/m2, 63% paroxysmal AF). There was no difference between FV, RA and LA regarding NLR and CD40 ligand. Factors associated with platelets activity: P-selectin, IPC and IPF% were higher in RA vs LA (60.3 IQR 49.0-76.4 ng/ml vs. 59.3 IQR 49.0-74.7, respectively, p=0.03 for P-selectin, 7.5 IQR 5.2-10 103/μL vs. 7.1 IQR 5-9.8, p<0.01 for IPC, and 3.6 IQR 2.7-5.0 % vs. 3.6 IQR 2.6-4.8, p<0.01 for IPF%). Similar trends were for E-selectin (41.2 IQR 31.1-51.2 ng/mL vs. 38.7 IQR 27.9-50.4 p=0.09). Similar significant differences were found in patients with CHA2DS2-VASC≥2 but not in patients with low score. Conclusions Patients with AF, especially those with CHA2DS2-VASc≥2, have higher markers of thrombogenicity in RA compared to LA. There was no difference in inflammatory properties between the atria.
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Affiliation(s)
- Olga Perelshtein Brezinov
- Department of Cardiology, Assuta Ashdod Medical Center, Ashdod.,The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Ziv Sevilya
- Department of Cardiology, Assuta Ashdod Medical Center, Ashdod.,The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Ella Yahud
- Department of Cardiology, Assuta Ashdod Medical Center, Ashdod.,The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Michael Rahkovich
- Department of Cardiology, Assuta Ashdod Medical Center, Ashdod.,The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Yonatan Kogan
- Department of Cardiology, Assuta Ashdod Medical Center, Ashdod.,The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Gergana Marincheva
- Department of Cardiology, Assuta Ashdod Medical Center, Ashdod.,The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Yana Kakzanov
- Department of Cardiology, Assuta Ashdod Medical Center, Ashdod.,The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Eli Lev
- Department of Cardiology, Assuta Ashdod Medical Center, Ashdod.,The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Avishag Laish-Farkash
- Department of Cardiology, Assuta Ashdod Medical Center, Ashdod.,The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
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Laish-Farkash A, Perelshtein Brezinov O, Valdman A, Tam D, Rahkovich M, Kogan Y, Marincheva G. Evaluation of left atrial remodeling by 2D-speckle-tracking echocardiography versus by high-density voltage mapping in patients with atrial fibrillation. J Cardiovasc Electrophysiol 2020; 32:305-315. [PMID: 33331056 DOI: 10.1111/jce.14837] [Citation(s) in RCA: 6] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 11/17/2020] [Accepted: 12/01/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND Strain imaging during left atrial (LA) reservoir phase (LASr) is used as a surrogate for LA structural remodeling and fibrosis. Atrial fibrillation (AF) patients with >5% low-voltage zones (LVZs) obtained by 3D-electro-anatomical-mapping have higher recurrence rate post-ablation. We investigated the relationship between LA remodeling using two-dimensional-speckle-tracking echocardiography (2D-STE) and high-density voltage mapping in AF patients. METHODS A prospective study of 42 consecutive patients undergoing AF ablation. 2D-echo, 2D-STE, and high-density contact LA bipolar voltage maps were constructed before ablation. LVZs were determined with different bipolar amplitudes and their ratio per patient's LA area were investigated for correlation with LASr. We compared 2D-LASr results in patients with LVZs ≥ 5% (LVZs group) versus those with LVZ < 5% (non-LVZs group). RESULTS Compared with non-LVZs group (n = 15), LVZs group (n = 27) included significantly older patients, more women, more persistent AF, higher CHA2 DS2 -VASc score, higher E/A ratio and higher LA volume index (p < .05). LVZs group had lower %LASr values (12.4 ± 5.9% vs. 21.1 ± 6.3, respectively; p<.001). LVZs% in different amplitudes (<0.1 mV, <0.2 mV, and <0.5 mV) were negatively correlated with %LASr (r = -.63, r = -.68, and r = -.72, respectively; p< .001). Atrial strain thresholds for LVZs ≥ 5% in amplitudes <0.1 mV, <0.2 mV, and <0.5 mV were associated with %LASr 12.98, 16.16 and 19.55, respectively; p< .05). In a multivariate analysis, %LASr was the only independent indicator of LVZs (OR, 0.8; 95% CI, 0.6-0.9; p= .04). CONCLUSIONS LVZs ≥ 5% has a negative association with atrial %LASr. Thus, a simple 2D-STE measurement of %LASr can be used as a noninvasive method to evaluate significant LA remodeling and fibrosis in AF patients.
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Affiliation(s)
- Avishag Laish-Farkash
- Cardiology Department, Assuta Ashdod University Medical Center, Ashdod, Israel.,Department of Health Sciences, Ben Gurion University of The Negev, Beer-Sheva, Israel
| | - Olga Perelshtein Brezinov
- Cardiology Department, Assuta Ashdod University Medical Center, Ashdod, Israel.,Department of Health Sciences, Ben Gurion University of The Negev, Beer-Sheva, Israel
| | - Andrei Valdman
- Cardiology Department, Assuta Ashdod University Medical Center, Ashdod, Israel.,Department of Health Sciences, Ben Gurion University of The Negev, Beer-Sheva, Israel
| | - Dudi Tam
- Biosense Webster, Johnson and Johnson, Yokneam, Israel
| | - Michael Rahkovich
- Cardiology Department, Assuta Ashdod University Medical Center, Ashdod, Israel.,Department of Health Sciences, Ben Gurion University of The Negev, Beer-Sheva, Israel
| | - Yonatan Kogan
- Cardiology Department, Assuta Ashdod University Medical Center, Ashdod, Israel.,Department of Health Sciences, Ben Gurion University of The Negev, Beer-Sheva, Israel
| | - Gergana Marincheva
- Cardiology Department, Assuta Ashdod University Medical Center, Ashdod, Israel.,Department of Health Sciences, Ben Gurion University of The Negev, Beer-Sheva, Israel
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Yahud E, Paul G, Rahkovich M, Vasilenko L, Kogan Y, Lev E, Laish-Farkash A. Cannabis induced cardiac arrhythmias: a case series. Eur Heart J Case Rep 2020; 4:1-9. [PMID: 33442601 PMCID: PMC7793045 DOI: 10.1093/ehjcr/ytaa376] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/21/2020] [Accepted: 09/16/2020] [Indexed: 12/14/2022]
Abstract
Introduction Cannabis use is known to be associated with significant cardiovascular morbidity. We describe three cases of cannabis-related malignant arrhythmias, who presented to the cardiac department at our institution within the last 2 years. All three patients were known to smoke cannabis on daily basis. Case summaries Case 1: A 30-year-old male, presented with recent onset of palpitations. A 12-lead electrocardiogram (ECG), transthoracic echocardiogram (TTE), and blood tests were all normal. During an inpatient exercise treadmill test (ETT) he developed polymorphic ventricular tachycardia (VT), which converted spontaneously to supraventricular tachycardia (SVT) in the recovery phase of the test. Subsequent risk stratification with cardiac magnetic resonance imaging and coronary angiography showed no abnormalities and an electrophysiological study was negative for sustained VT, however, SVT was easily induced with rapid conversion to atrial fibrillation. The patient successfully stopped smoking all tobacco products including cannabis and was treated with beta-blockers, with no further episodes of arrhythmia. Case 2: A 30-year-old male presented to the Emergency Department with palpitations, chest pain, and dizziness that improved during exertion. His initial ECG demonstrated complete atrioventricular block (AVB). Subsequent traces showed Mobitz Type I and second-degree AVB, which converted to atrial flutter after exertion. Routine blood tests, TTE, and an ETT were all normal and he was discharged home with no conduction abnormalities. Case 3: A 24-year-old male presented with two episodes of syncope. Baseline examination was normal, with an ECG showing a low atrial rhythm. Interrogation of his implantable loop recorder showed episodes of early morning bradycardia episodes with no associated symptoms. Discussion Cannabis-related arrhythmia can be multiform regarding their presentation. Therefore, ambiguous combinations of arrhythmia should raise suspicion of underlying cannabis abuse, where clinically appropriate. Although causality with regards to cannabis use cannot be proven definitively in these cases, the temporal relationship between drug use and the onset of symptoms suggests a strong association.
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Affiliation(s)
- Ella Yahud
- Cardiology Division, Assuta Ashdod University Hospital, Ha-Refua St 7, Ashdod 7747629, Israel
| | - Gideon Paul
- Cardiology Division, Assuta Ashdod University Hospital, Ha-Refua St 7, Ashdod 7747629, Israel
| | - Michael Rahkovich
- Cardiology Division, Assuta Ashdod University Hospital, Ha-Refua St 7, Ashdod 7747629, Israel
| | - Lubov Vasilenko
- Cardiology Division, Assuta Ashdod University Hospital, Ha-Refua St 7, Ashdod 7747629, Israel
| | - Yonatan Kogan
- Cardiology Division, Assuta Ashdod University Hospital, Ha-Refua St 7, Ashdod 7747629, Israel
| | - Eli Lev
- Cardiology Division, Assuta Ashdod University Hospital, Ha-Refua St 7, Ashdod 7747629, Israel
| | - Avishag Laish-Farkash
- Cardiology Division, Assuta Ashdod University Hospital, Ha-Refua St 7, Ashdod 7747629, Israel
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Perelshtein Brezinov O, Sevylia Z, Rahkovich M, Kakzanov Y, Yahud E, Fortis L, Kogan Y, Asher E, Lev E, Laish-Farkash A. Measurements of immature platelet fraction and inflammatory markers in atrial fibrillation patients - Does persistency or ablation affect results? Int J Lab Hematol 2020; 43:602-608. [PMID: 33289968 DOI: 10.1111/ijlh.13426] [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: 10/09/2020] [Revised: 11/13/2020] [Accepted: 11/20/2020] [Indexed: 11/28/2022]
Abstract
PURPOSE Atrial fibrillation (AF) is associated with platelet hyperactivity and a higher proportion of immature platelets. We aimed to examine whether immature platelet fraction (IPF) and inflammatory markers differ between AF types and whether they are affected by ablation. METHODS A prospective study included patients with atrial fibrillation/flutter (AFL). We excluded patients with hematologic, inflammatory, or acute coronary states. Blood samples for IPF, white blood cells (WBC), neutrophil-to-lymphocyte ratio (NLR), and C-reactive protein (CRP) were collected at baseline, within one-hour postablation in those undergoing ablations, and the day after ablation. IPF was measured by an autoanalyzer (Sysmex 2100 XE). RESULTS One hundred and four patients were included (paroxysmal AF-63, persistent AF-36, AF and AFL-7, AFL alone-5), (Mean age 67.7 ± 12.8 years, 54.8% male, CHA2 D2 -VASC2 3.2 ± 1.8). Seventy-two patients underwent ablation (cryoballoon AF ablation-60, AFL radiofrequency ablation-5, both-7). There was no difference between paroxysmal and persistent AF regarding baseline markers. There was a significant change in the following parameters after ablation: WBC (baseline 6.9 ± 2.0, 1-h post 8.0 ± 2.4, and 1-day post 9.0 ± 2.8 ×109 /L), NLR (2.9 ± 2.2, 3.0 ± 2.4, 4.2 ± 2.9, respectively), and CRP (3.6 ± 3.7, 3.6 ± 3.5, 12.4 ± 9.0 mg/L, respectively) (P < .05 for all). However, there were no differences in immature platelet count (8.6 ± 4.8, 8.5 ± 4.9, 8.4 ± 5.2 ×109 /L) or IPF (4.6 ± 3.2, 4.7 ± 3.3, 4.9 ± 3.6%) from baseline to postablation (p = NS). CONCLUSIONS AF persistency does not affect IPF and inflammation. In patients undergoing cryoablation of AF, there is a postablation inflammatory process; however, platelet activation is probably not affected.
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Affiliation(s)
- Olga Perelshtein Brezinov
- Department of Cardiology, Assuta Ashdod University Medical Center, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Ziv Sevylia
- Department of Cardiology, Assuta Ashdod University Medical Center, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Michael Rahkovich
- Department of Cardiology, Assuta Ashdod University Medical Center, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Yana Kakzanov
- Department of Cardiology, Assuta Ashdod University Medical Center, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Ella Yahud
- Department of Cardiology, Assuta Ashdod University Medical Center, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Lior Fortis
- Department of Cardiology, Assuta Ashdod University Medical Center, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Yonatan Kogan
- Department of Cardiology, Assuta Ashdod University Medical Center, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Elad Asher
- Jesselson Integrated Heart Center, Shaare Zedek Medical Center, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Eli Lev
- Department of Cardiology, Assuta Ashdod University Medical Center, Ben-Gurion University of the Negev, Ashdod, Israel
| | - Avishag Laish-Farkash
- Department of Cardiology, Assuta Ashdod University Medical Center, Ben-Gurion University of the Negev, Ashdod, Israel
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10
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Tsur N, Kogan Y, Rehm M, Agur Z. Response of patients with melanoma to immune checkpoint blockade – insights gleaned from analysis of a new mathematical mechanistic model. J Theor Biol 2020; 485:110033. [DOI: 10.1016/j.jtbi.2019.110033] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 07/05/2019] [Accepted: 09/26/2019] [Indexed: 12/30/2022]
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11
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Kogan Y, Kleiman M, Shannon S, Elishmereni M, Taub E, Aptekar L, Brenner R, Berger R, Nechushtan H, Agur Z. 176P PrediCare: A new diagnostic tool predicting imminent disease progression in advanced NSCLC patients by machine-learning integration of three serum biomarkers. J Thorac Oncol 2018. [DOI: 10.1016/s1556-0864(18)30450-7] [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: 11/24/2022]
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12
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Teodorovich N, Swissa MS, Kogan Y, Gandelman G, Jonas M, George J, Swissa M. Atrial fibrillation and CHADS 2 score as mortality predictors in young versus elderly patients undergoing coronary angiography. J Geriatr Cardiol 2017; 14:582-586. [PMID: 29056957 PMCID: PMC5641646 DOI: 10.11909/j.issn.1671-5411.2017.09.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023] Open
Affiliation(s)
- Nicholay Teodorovich
- Kaplan Medical Center, Rehovot and the Hebrew University of Jerusalem, Jerusalem, Israel
| | - Michael Sraia Swissa
- Kaplan Medical Center, Rehovot and the Hebrew University of Jerusalem, Jerusalem, Israel
| | - Yonatan Kogan
- Kaplan Medical Center, Rehovot and the Hebrew University of Jerusalem, Jerusalem, Israel
| | - Gera Gandelman
- Kaplan Medical Center, Rehovot and the Hebrew University of Jerusalem, Jerusalem, Israel
| | - Michael Jonas
- Kaplan Medical Center, Rehovot and the Hebrew University of Jerusalem, Jerusalem, Israel
| | - Jacob George
- Kaplan Medical Center, Rehovot and the Hebrew University of Jerusalem, Jerusalem, Israel
| | - Moshe Swissa
- Kaplan Medical Center, Rehovot and the Hebrew University of Jerusalem, Jerusalem, Israel
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13
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Teodorovich N, Jonas M, Gandelman G, Kogan Y, George J, Swissa M. P1789Elevated antiendothelial cell antibodies are associated with higher likelihood of normal coronary angiograms. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1789] [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: 11/14/2022] Open
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14
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Affiliation(s)
- Offir Paz
- Kaplan Medical Center, Rehovot, Israel, and The Hebrew University, Jerusalem, Israel
| | - Nicolay Teodorovich
- Kaplan Medical Center, Rehovot, Israel, and The Hebrew University, Jerusalem, Israel
| | - Yonatan Kogan
- Kaplan Medical Center, Rehovot, Israel, and The Hebrew University, Jerusalem, Israel
| | - Moshe Swissa
- Kaplan Medical Center, Rehovot, Israel, and The Hebrew University, Jerusalem, Israel.
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15
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Teodorovich N, Kogan Y, Jonas M, Gandelman G, George J, Swissa M. P844Atrial fibrillation is an Independent predictor of mortality in patients undergoing coronary angiography. Europace 2017. [DOI: 10.1093/ehjci/eux151.026] [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: 11/13/2022] Open
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16
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Affiliation(s)
- Nicholay Teodorovich
- Department of Cardiology, Kaplan Medical Center, Rehovot, Israel.,Hebrew University Hadassah School of Medicine, Jerusalem, Israel
| | - Yonatan Kogan
- Department of Cardiology, Kaplan Medical Center, Rehovot, Israel.,Hebrew University Hadassah School of Medicine, Jerusalem, Israel
| | - Offir Paz
- Department of Cardiology, Kaplan Medical Center, Rehovot, Israel.,Hebrew University Hadassah School of Medicine, Jerusalem, Israel
| | - Moshe Swissa
- Department of Cardiology, Kaplan Medical Center, Rehovot, Israel.,Hebrew University Hadassah School of Medicine, Jerusalem, Israel
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17
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Foryś U, Bodnar M, Kogan Y. Asymptotic dynamics of some t-periodic one-dimensional model with application to prostate cancer immunotherapy. J Math Biol 2016; 73:867-83. [PMID: 26897354 PMCID: PMC5018042 DOI: 10.1007/s00285-016-0978-4] [Citation(s) in RCA: 4] [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: 01/23/2015] [Revised: 12/02/2015] [Indexed: 01/21/2023]
Abstract
In the case of some specific cancers, immunotherapy is one of the possible treatments that can be considered. Our study is based on a mathematical model of patient-specific immunotherapy proposed in Kronik et al. (PLoS One 5(12):e15,482, 2010). This model was validated for clinical trials presented in Michael et al. (Clin Cancer Res 11(12):4469–4478, 2005). It consists of seven ordinary differential equations and its asymptotic dynamics can be described by some t-periodic one-dimensional dynamical system. In this paper we propose a generalised version of this t-periodic system and study the dynamics of the proposed model. We show that there are three possible types of the model behaviour: the solution either converges to zero, or diverges to infinity, or it is periodic. Moreover, the periodic solution is unique, and it divides the phase space into two sub-regions. The general results are applied to the PC specific case, which allow to derive conditions guaranteeing successful as well as unsuccessful treatment. The results indicate that a single vaccination is not sufficient to cure the cancer.
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Affiliation(s)
- U Foryś
- Faculty of Mathematics, Informatics and Mechanics, Institute of Applied Mathematics and Mechanics, Warsaw University, Warsaw, Poland
| | - M Bodnar
- Faculty of Mathematics, Informatics and Mechanics, Institute of Applied Mathematics and Mechanics, Warsaw University, Warsaw, Poland.
| | - Y Kogan
- Institute for Medical BioMathematics, Bene Ataroth, Israel
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18
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Abstract
Adenosine can produce arrhythmias, which are generally short living. It may induce PACs and PVCs, sinus bradycardia, and atrial fibrillation. There have been reports of transient polymorphic VT (torsades de pointes) in patients with LQTS and others in people with normal QT interval. We report a case of a long episode of polymorphic VT induced by adenosine. A 27 year old woman received 6 mg adenosine for PSVT, which terminated and torsades de pointes developed, persisting for 17 seconds and terminated spontaneously. This is the longest described duration of the torsades after adenosine administration in patients with normal QT interval.
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Affiliation(s)
- Nicholay Teodorovich
- Department of Cardiology, Kaplan Medical Center, Rehovot, Israel; The Hebrew University, Jerusalem, Israel.
| | - Elena Margolin
- Department of Cardiology, Kaplan Medical Center, Rehovot, Israel; The Hebrew University, Jerusalem, Israel
| | - Yonatan Kogan
- Department of Cardiology, Kaplan Medical Center, Rehovot, Israel; The Hebrew University, Jerusalem, Israel
| | - Ofir Paz
- Department of Cardiology, Kaplan Medical Center, Rehovot, Israel; The Hebrew University, Jerusalem, Israel
| | - Moshe Swissa
- Department of Cardiology, Kaplan Medical Center, Rehovot, Israel; The Hebrew University, Jerusalem, Israel
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19
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Kalev-Kronik N, Kogan Y, Vainstein V, Agur Z. 272 POSTER Effective immunotherapy treatment for glioblastoma multiforme: predictions of a mathematical model. EJC Suppl 2006. [DOI: 10.1016/s1359-6349(06)70277-4] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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20
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Agur Z, Arakelyan L, Belilty G, Dahan N, Harpak H, Kogan Y, Merbl Y, Rabinovich A, Shoham M, Ziv I. Application of the Virtual Cancer Patient Engine (VCPE) for improving oncological treatment desig. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.692] [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: 11/20/2022] Open
Affiliation(s)
- Z. Agur
- Institute for Medical BioMathematics (IMBM), Bene Ataroth, Israel; Optimata ltd, Ramat-Gan, Israel
| | - L. Arakelyan
- Institute for Medical BioMathematics (IMBM), Bene Ataroth, Israel; Optimata ltd, Ramat-Gan, Israel
| | - G. Belilty
- Institute for Medical BioMathematics (IMBM), Bene Ataroth, Israel; Optimata ltd, Ramat-Gan, Israel
| | - N. Dahan
- Institute for Medical BioMathematics (IMBM), Bene Ataroth, Israel; Optimata ltd, Ramat-Gan, Israel
| | - H. Harpak
- Institute for Medical BioMathematics (IMBM), Bene Ataroth, Israel; Optimata ltd, Ramat-Gan, Israel
| | - Y. Kogan
- Institute for Medical BioMathematics (IMBM), Bene Ataroth, Israel; Optimata ltd, Ramat-Gan, Israel
| | - Y. Merbl
- Institute for Medical BioMathematics (IMBM), Bene Ataroth, Israel; Optimata ltd, Ramat-Gan, Israel
| | - A. Rabinovich
- Institute for Medical BioMathematics (IMBM), Bene Ataroth, Israel; Optimata ltd, Ramat-Gan, Israel
| | - M. Shoham
- Institute for Medical BioMathematics (IMBM), Bene Ataroth, Israel; Optimata ltd, Ramat-Gan, Israel
| | - I. Ziv
- Institute for Medical BioMathematics (IMBM), Bene Ataroth, Israel; Optimata ltd, Ramat-Gan, Israel
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21
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Haselkorn R, Lapidus A, Kogan Y, Vlcek C, Paces J, Paces V, Ulbrich P, Pecenkova T, Rebrekov D, Milgram A, Mazur M, Cox R, Kyrpides N, Ivanova N, Kapatral V, Los T, Lykidis A, Mikhailova N, Reznik G, Vasieva O, Fonstein M. The Rhodobacter capsulatus genome. Photosynth Res 2001; 70:43-52. [PMID: 16228361 DOI: 10.1023/a:1013883807771] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The genome of Rhodobacter capsulatus has been completely sequenced. It consists of a single chromosome containing 3.5 Mb and a circular plasmid of 134 kb. This effort, started in 1992, began with a fine-structure restriction map of an overlapping set of cosmids that covered the genome. Cosmid sequencing led to a gapped genome that was filled by primer walking on the chromosome and by using lambda clones. Methods had to be developed to handle strong stops in the high GC (68%) inserts. Annotation was done with the ERGO system at Integrated Genomics, as was the reconstruction of the cell's metabolism. It was possible to recognize 3709 orfs of which functional assignments could be made with high confidence to 2392 (65%). Unusual features include the presence of numerous cryptic phage genomes embedded in the chromosome.
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Affiliation(s)
- R Haselkorn
- Integrated Genomics, Inc., 2201 West Campbell Park Drive, Chicago, IL, 60612, USA,
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22
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Selkov E, Overbeek R, Kogan Y, Chu L, Vonstein V, Holmes D, Silver S, Haselkorn R, Fonstein M. Functional analysis of gapped microbial genomes: amino acid metabolism of Thiobacillus ferrooxidans. Proc Natl Acad Sci U S A 2000; 97:3509-14. [PMID: 10737802 PMCID: PMC16270 DOI: 10.1073/pnas.97.7.3509] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A gapped genome sequence of the biomining bacterium Thiobacillus ferrooxidans strain ATCC23270 was assembled from sheared DNA fragments (3.2-times coverage) into 1,912 contigs. A total of 2,712 potential genes (ORFs) were identified in 2.6 Mbp (megabase pairs) of Thiobacillus genomic sequence. Of these genes, 2,159 could be assigned functions by using the WIT-Pro/EMP genome analysis system, most with a high degree of certainty. Nine hundred of the genes have been assigned roles in metabolic pathways, producing an overview of cellular biosynthesis, bioenergetics, and catabolism. Sequence similarities, relative gene positions on the chromosome, and metabolic reconstruction (placement of gene products in metabolic pathways) were all used to aid gene assignments and for development of a functional overview. Amino acid biosynthesis was chosen to demonstrate the analytical capabilities of this approach. Only 10 expected enzymatic activities, of the nearly 150 involved in the biosynthesis of all 20 amino acids, are currently unassigned in the Thiobacillus genome. This result compares favorably with 10 missing genes for amino acid biosynthesis in the complete Escherichia coli genome. Gapped genome analysis can therefore give a decent picture of the central metabolism of a microorganism, equivalent to that of a complete sequence, at significantly lower cost.
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Affiliation(s)
- E Selkov
- Integrated Genomics, 2201 W. Campbell Park Drive, Chicago, IL 60612, USA
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23
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Fonstein M, Nikolskaya T, Kogan Y, Haselkorn R. Genome encyclopedias and their use for comparative analysis of Rhodobacter capsulatus strains. Electrophoresis 1998; 19:469-77. [PMID: 9588789 DOI: 10.1002/elps.1150190403] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This paper consists of two components: the use of gene encyclopedias in genomic studies and Rhodobacter capsulatus genome project. A survey of vectors used for encyclopedia construction includes a brief discussion of their relative advantages and limitations. Projects employing various methods of encyclopedia assembly including the comparison of restriction patterns, restriction maps, linking by hybridization, oligonucleotide fingerprinting, sequence tagged site (STS) fingerprinting and encyclopedias derived from genetic maps are listed and briefly described. The R. capsulatus SB 1003 genome project started with the construction of its cosmid encyclopedia, which comprises 192 cosmids covering the chromosome and the 134 kbp plasmid in strain SB 1003, with the exact map coordinates of each cosmid. In a pilot sequencing study, several cosmids were individually subcloned using the vector M13mp18 and merged into one 189 kbp contig. About 160 open reading frames (ORFs) identified by the CodonUse program were subjected to similarity searches. The biological functions of eighty ORFs could be assigned reliably using the WIT (what is there) genome investigation environment. Eighty percent of these recognizable ORFs were organized in functional clusters, which simplified assignment decisions and increased the strength of the predictions. A set of 26 genes for cobalamin biosynthesis, genes for polyhydroxyalkanoic acid metabolism, DNA replication and recombination, and DNA gyrase were among those identified. Recently, another 1.2 Mbp genome fragment of the Rhodobacter genome was sequenced using a slightly modified approach. These results together with some genome investigation tools, have been placed at our web site (http://capsulapedia.uchicago.edu). The sequence of R. capsulatus is expected to be completed by summer 1998. A project to construct a systematic set of deletion strains of R. capsulatus in order to assign functions to unknown ORFs has been started. Preliminary data demonstrate the extreme convenience of the unique gene transfer agent (GTA) system to perform such work.
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Affiliation(s)
- M Fonstein
- Department of Molecular Genetics and Cell Biology, The University of Chicago, IL 60637, USA.
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Abstract
Tartrate-resistant acid phosphatase (TRAP) histochemistry has been used to follow chondro/osteoclasts and their precursors during ontogenesis of the mandibular condyle of the mouse (from day 16 of gestation until day 15 of neonatal life). TRAP+ mono-, bi-, and multinuclear cells were counted separately in the perichondrium, along the resorption front and in the subchondral spongiosa. Index of cellular density was calculated by dividing the absolute numbers of cells by the length of resorption front or the area of spongiosa, respectively. The study revealed that TRAP+ cells are present in the perichondrium of the mandibular condylar cartilage from the first day of its existence as an organ, namely day 17 of gestation. These cells are more numerous in the posterior part of the condyle, and reach their maximal number on the third day of neonatal life. Along the resorption front, mono-, bi-, and multinucleated TRAP+ cells were counted. Their total number and their respective indexes of cellular density changed variably during the observation period: (a) the number of mononuclear cells increased gradually and, by the end of the observation period, was 13 times greater than it was at the beginning; (b) the number of binuclear cells increased threefold; and (c) the number of multinuclear cells stayed constant, except for a small peak around the time of birth. The changes in the spongiosa showed an opposite trend. In the spongiosa, the index of cellular density of the mononuclear TRAP+ cells increased slightly during ontogenesis. The number of binuclear cells increased twofold, while the number of multinuclear cells increased 17-fold.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- D Lewinson
- Division of Morphological Sciences, Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
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26
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Abstract
An unusual case of self-strangulation with an elastic band is described. The victim was a young Hispanic male with a complicated psychiatric history, including suicide attempts. Mechanisms of strangulation and mechanical asphyxial death are discussed briefly.
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Carlip S, Kogan Y. Quantum geometrodynamics of the open topological membrane and string moduli space. Phys Rev Lett 1990; 64:1487-1490. [PMID: 10041410 DOI: 10.1103/physrevlett.64.1487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Sengupta SK, Kogan Y, Kelly C, Szabo J. New actinomycin D analogues as superior chemotherapeutic agents against primary and advanced colon tumors and colon xenografts in nude mice. J Med Chem 1988; 31:768-74. [PMID: 3351854 DOI: 10.1021/jm00399a014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
"Reverse" analogues (RAD's) of actinomycin D (AMD) and their antitumor activity against mouse and human colon tumor cells are reported. RAD's are tetracyclic, and they have an oxazole ring fused on the tricyclic phenoxazine chromophore of AMD. The oxazole ring in RAD is substituted at the C-2 carbon with either a CH3 (in RAD I), a C6H5 (in RAD II), or a CH2CONH(CH2)4NH2 (in RAD III) group. In tumor cells and rat hepatic microsomes, RAD's are metabolized to a tricyclic "symmetrical" analogue of AMD (SAD) with the loss of the oxazole ring and its substituents. RAD and SAD are very active in priming superoxides in the presence of microsomal enzymes as well as in inhibiting the synthesis of DNA and the growth of human colon tumor HT-29 cells in vitro. RAD III and SAD efficiently cleave closed circular plasmid pBR322 DNA like the antitumor agent bleomycin. In addition to their strong inhibitory activity against P388 and B16 tumors in vitro and in vivo, RAD III and SAD demonstrate high levels of activity against primary C26 and advanced C38 colon tumors in mice and against a xenograft of human colon adenocarcinoma CX-1 in athymic mice. In all these biological activities, the analogues demonstrate superiority to AMD in several experimental tumors. Also, the analogues, in contrast to AMD, show reduced toxicity in tumor-free mice, which is possibly due to the metabolic deactivation of SAD in host organs.
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Affiliation(s)
- S K Sengupta
- Department of Obstetrics and Gynecology, Boston University Medical Center, School of Medicine, Massachusetts 02118
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Sengupta SK, Anderson JE, Kogan Y, Trites DH, Beltz WR, Madhavarao MS. N2- and C-7 substituted actinomycin D analogues: synthesis, DNA-binding affinity, and biochemical and biological properties. Structure-activity relationship. J Med Chem 1981; 24:1052-9. [PMID: 6169834 DOI: 10.1021/jm00141a007] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
N2-n-Alkyl- and omega-amino-n-alkylactinomycin D and 7-alkoxy-, 7-aralkoxy-, and 7-(acyloxy)actinomycin D were synthesized by modification of the parent actinomycin D molecule at the N2 and C-7 positions of the phenoxazinone moiety. The intermediate for N2 substitution was 2-deamino-2-chloroactinomycin D. For C-7 substitution, 7-hydroxyactinomycin D was used as the intermediate. Treatment of 2-deamino-2-chloroactinomycin D with an excess of the appropriate amine produced the N2-substituted derivatives. Condensation of the required alkyl or acyl halides with 7-hydroxyactinomycin D, aided by solid anhydrous potassium carbonate, yielded the C-7-substituted analogues. Calf thymus DNA-binding affinity was determined by equilibrium binding and also by thermal denaturation of DNA techniques, inhibitory activity of nucleic acid synthesis was examined using P388 cells in vitro, cytotoxicity measurements to tumor cells in vitro employed human lymphoblastic leukemic cells (CCRF-CEM), and antitumor activity was assayed against P388 mouse leukemia in CDF1 mice. Synthesis of a number of new analogues in each series and determination of the biophysical, biochemical, and biological properties established a more thorough structure-activity relationship in these analogues. These results establish that with the selection of omega-(n-alkylamino) groups at the N2 site or O-n-alkyl or O-acyl groups at the C-7 site a variety of modifications can be carried out on the actinomycin molecule while preserving biological activity. N2-3'-Amino-n-propyl- and N2-10'-amino-n-decylactinomycin D, 7-methoxy- and 7-ethoxyactinomycin D, and the 7-O-(1'-adamantoyl) ester of 7-hydroxyactinomycin D were found to be the most effective antitumor agents in vivo and in vitro. They also strongly inhibit cellular RNA and DNA synthesis and, with the exception of the ester, retain high DNA-binding affinity.
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