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Pipek LZ, Nascimento RFV, Coronel SI, Baker M, Basto FM, Silva GD. Antithrombotic therapy for secondary stroke prevention in patients with cancer: a systematic review and network meta-analysis. Eur J Clin Pharmacol 2025:10.1007/s00228-025-03847-1. [PMID: 40332574 DOI: 10.1007/s00228-025-03847-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2025] [Accepted: 04/30/2025] [Indexed: 05/08/2025]
Abstract
BACKGROUND The risk of stroke among patients with cancer is two times that of the general population due to a combination of cancer-, chemotherapy-, radiotherapy-, and surgery-related factors. There is a paucity of data regarding the optimal antithrombotic therapy for secondary stroke prevention in these patients. OBJECTIVES Our goal was to review the stroke recurrence in patients treated with different antithrombotic therapies (antiplatelets, warfarin, heparin, and direct oral anticoagulants). Our secondary objective was to review the bleeding risk across different antithrombotic therapies. METHODS A review of the literature was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Articles that adequately assessed secondary prevention of stroke in patients with cancer were selected from the PubMed, Embase, and Scopus databases from inception until March 2, 2025. We performed a network meta-analysis for stroke recurrence, major bleeding, and mortality. The treatments were ranked by P-SCORE. Subgroup analyses were conducted based on median D-dimer levels, multiple territories of stroke, and exclusion of studies with high risk of bias. RESULTS We included 11 studies (four RCTs, six retrospective studies, and one case series) with a total of 1319 patients. In the primary analysis, antiplatelets were the highest-ranked treatment for reducing stroke recurrence (RR 0.44 [0.20; 0.96]), followed by LMWH (RR 0.50 [0.26; 0.96]), both significantly superior to no treatment. However, LMWH consistently ranked higher than antiplatelets in all subgroup analyses. There was no difference regarding major bleeding or mortality. CONCLUSION Antiplatelets can be considered an option for secondary prevention of stroke in patients with cancer, especially in patients with a higher bleeding risk. Future research with high-quality studies is needed to confirm our preliminary findings and should focus on identifying subgroups of patients with cancer who may benefit most from specific antithrombotic therapies.
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Affiliation(s)
- Leonardo Zumerkorn Pipek
- Division of Neurology, Faculdade de Medicina, Hospital das Clínicas HCFMUSP, Universidade de São Paulo, São Paulo, Brazil.
| | | | | | - Mark Baker
- Division of Neurology, George Washington University Hospital, Washington, DC, USA
| | - Fernando Mayor Basto
- Division of Neurology, George Washington University Hospital, Washington, DC, USA
| | - Guilherme Diogo Silva
- Division of Neurology, Faculdade de Medicina, Hospital das Clínicas HCFMUSP, Universidade de São Paulo, São Paulo, Brazil
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2
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Essibayi MA, Azzam AY, Sener U, Altschul D, Atik M, Keser Z. Direct Oral Anticoagulants vs. Heparin for Cancer-Related Stroke: Augmented Meta-Analysis. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.11.14.24317340. [PMID: 39677488 PMCID: PMC11643248 DOI: 10.1101/2024.11.14.24317340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/17/2024]
Abstract
Background Ischemic stroke is common among patients with systemic malignancy, associated with increased risk of neurological deterioration and mortality compared to the general population. Optimal approach to secondary stroke prevention in cancer patients is unclear. In this meta-analysis, we evaluated available data on the use of direct oral anticoagulants (DOACs) and heparin products for stroke prevention in this population. Methods Using the Nested Knowledge AutoLit software, we performed PubMed search in September 2023 for articles reporting the use of antithrombotics for cancer-associated stroke. We conducted systematic review and meta-analysis. We also used a novel computational augmentation method to amplify the sample size to predict the effect before and after sample size augmentation and predict the results of further trials. Results Among 253 potential studies screened, 7 were eligible for inclusion. 439 patients were treated with DOACs and 3968 with heparin products. Among patients treated with heparin, intracerebral hemorrhage (8.8 % vs 1.6, p=.02), overall hemorrhagic complications (17.9% vs 3.5%, p<.001), and mortality [28.1% vs 23.5%, p<.001] were respectively significantly higher than those reported among patients who received DOAC for cancer-associated ischemic stroke. No significant difference was observed in the rates of recurrent deep venous thrombosis, clinically significant hemorrhage, and clinical outcomes between the treatment groups. Similar results were shown with augmented meta-analysis. Conclusions This meta-analysis shows DOACs may have efficacy and safety profile similar to heparin products for recurrent stroke prevention in patients with cancer. Given the small number of studies and limited data, findings should be interpreted with caution.
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Affiliation(s)
- Muhammed Amir Essibayi
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
- Department of Neurosurgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Ahmed Y. Azzam
- Department of Neurosurgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Ugur Sener
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
| | - David Altschul
- Department of Neurosurgery, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Merve Atik
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA
| | - Zafer Keser
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
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Heo JH, Yun J, Kim KH, Jung JW, Yoo J, Kim YD, Nam HS. Cancer-Associated Stroke: Thrombosis Mechanism, Diagnosis, Outcome, and Therapeutic Strategies. J Stroke 2024; 26:164-178. [PMID: 38836266 PMCID: PMC11164583 DOI: 10.5853/jos.2023.03279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 01/29/2024] [Accepted: 01/29/2024] [Indexed: 06/06/2024] Open
Abstract
Cancer can induce hypercoagulability, which may lead to stroke. This occurs when tumor cells activate platelets as part of their growth and metastasis. Tumor cells activate platelets by generating thrombin and expressing tissue factor, resulting in tumor cell-induced platelet aggregation. Histopathological studies of thrombi obtained during endovascular thrombectomy in patients with acute stroke and active cancer have shown a high proportion of platelets and thrombin. This underscores the crucial roles of platelets and thrombin in cancer-associated thrombosis. Cancer-associated stroke typically occurs in patients with active cancer and is characterized by distinctive features. These features include multiple infarctions across multiple vascular territories, markedly elevated blood D-dimer levels, and metastasis. The presence of cardiac vegetations on echocardiography is a robust indicator of cancer-associated stroke. Suspicion of cancer-associated stroke during endovascular thrombectomy arises when white thrombi are detected, particularly in patients with active cancer. Cancer-associated stroke is almost certain when histopathological examination of thrombi shows a very high platelet and a very low erythrocyte composition. Patients with cancer-associated stroke have high risks of mortality and recurrent stroke. However, limited data are available on the optimal treatment regimen for stroke prevention in these patients. Thrombosis mechanism in cancer is well understood, and distinct therapeutic targets involving thrombin and platelets have been identified. Therefore, direct thrombin inhibitors and/or antiplatelet agents may effectively prevent stroke recurrence. Additionally, this strategy has potential benefits in cancer treatment as accumulating evidence suggests that aspirin use reduces cancer progression, metastasis, and cancer-related mortality. However, clinical trials are necessary to assess the efficacy of this strategy involving the use of direct thrombin inhibitors and/or antiplatelet therapies.
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Affiliation(s)
- Ji Hoe Heo
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
- Integrative Research Center for Cerebrovascular and Cardiovascular Diseases, Seoul, Korea
| | - Jaeseob Yun
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
| | - Kwang Hyun Kim
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
| | - Jae Wook Jung
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
| | - Joonsang Yoo
- Department of Neurology, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea
| | - Young Dae Kim
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
- Integrative Research Center for Cerebrovascular and Cardiovascular Diseases, Seoul, Korea
| | - Hyo Suk Nam
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
- Integrative Research Center for Cerebrovascular and Cardiovascular Diseases, Seoul, Korea
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Kassubek R, Winter MAGR, Dreyhaupt J, Laible M, Kassubek J, Ludolph AC, Lewerenz J. Development of an algorithm for identifying paraneoplastic ischemic stroke in association with lung, pancreatic, and colorectal cancer. Ther Adv Neurol Disord 2024; 17:17562864241239123. [PMID: 38596402 PMCID: PMC11003337 DOI: 10.1177/17562864241239123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 02/19/2024] [Indexed: 04/11/2024] Open
Abstract
Background Paraneoplastic ischemic stroke has a poor prognosis. We have recently reported an algorithm based on the number of ischemic territories, C-reactive protein (CRP), lactate dehydrogenase (LDH), and granulocytosis to predict the underlying active cancer in a case-control setting. However, co-occurrence of cancer and stroke might also be merely incidental. Objective To detect cancer-associated ischemic stroke in a large, unselected cohort of consecutive stroke patients by detailed analysis of ischemic stroke associated with specific cancer subtypes and comparison to patients with bacterial endocarditis. Methods Retrospective single-center cohort study of consecutive 1612 ischemic strokes with magnetic resonance imaging, CRP, LDH, and relative granulocytosis data was performed, including identification of active cancers, history of now inactive cancers, and the diagnosis of endocarditis. The previously developed algorithm to detect paraneoplastic cancer was applied. Tumor types associated with paraneoplastic stroke were used to optimize the diagnostic algorithm. Results Ischemic strokes associated with active cancer, but also endocarditis, were associated with more ischemic territories as well as higher CRP and LDH levels. Our previous algorithm identified active cancer-associated strokes with a specificity of 83% and sensitivity of 52%. Ischemic strokes associated with lung, pancreatic, and colorectal (LPC) cancers but not with breast and prostate cancers showed more frequent and prominent characteristics of paraneoplastic stroke. A multiple logistic regression model optimized to identify LPC cancers detected active cancer with a sensitivity of 77.8% and specificity of 81.4%. The positive predictive value (PPV) for all active cancers was 13.1%. Conclusion Standard clinical examinations can be employed to identify suspect paraneoplastic stroke with an adequate sensitivity, specificity, and PPV when it is considered that the association of ischemic stroke with breast and prostate cancers in the stroke-prone elderly population might be largely incidental.
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Affiliation(s)
- Rebecca Kassubek
- Department of Neurology, University of Ulm, Oberer Eselsberg 45, Ulm 89081, Germany
| | | | - Jens Dreyhaupt
- Institute of Epidemiology and Medical Biometry, University of Ulm, Ulm, Germany
| | - Mona Laible
- Department of Neurology, University of Ulm, Ulm, Germany
| | - Jan Kassubek
- Department of Neurology, University of Ulm, Ulm, Germany
- German Center for Neurodegenerative Diseases (DZNE) Ulm, Ulm, Germany
| | - Albert C. Ludolph
- Department of Neurology, University of Ulm, Ulm, Germany
- German Center for Neurodegenerative Diseases (DZNE) Ulm, Ulm, Germany
| | - Jan Lewerenz
- Department of Neurology, University of Ulm, Ulm, Germany
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Hayakawa M. Cancer-Associated Stroke and Acute Endovascular Reperfusion Therapy. JOURNAL OF NEUROENDOVASCULAR THERAPY 2023; 17:272-280. [PMID: 38025257 PMCID: PMC10657734 DOI: 10.5797/jnet.ra.2023-0056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 09/19/2023] [Indexed: 12/01/2023]
Abstract
Since stroke is often associated with cancer, acute stroke patients with cancer undergoing endovascular therapy (EVT) are not uncommon. Reportedly, the proportion of such cases is approximately 6%-7% of all stroke EVT cases. Ischemic stroke in patients with active cancer (cancer-associated stroke) includes not only strokes caused by cancer-related hypercoagulability but also coincident strokes due to common etiologies, strokes associated with tumor emboli, direct tumor invasion of blood vessels, and strokes associated with cancer therapy. Stroke caused by cancer-related hypercoagulability itself encompasses various entities, including paradoxical embolism, stroke due to nonbacterial thrombotic endocarditis, and in situ arterial occlusion due to disseminated intravascular coagulation or thrombotic microangiopathy. Thus, diverse mechanisms contribute to cancer-associated stroke, emphasizing the need to consider individualized treatment strategies for acute cases involving large vessel occlusion. Observational studies have shown that EVT for cancer-associated stroke results in poorer clinical outcomes, but with comparable rates of successful reperfusion and symptomatic intracranial hemorrhage when compared with stroke patients without cancer. This suggests that denying patients EVT solely on the basis of comorbid active cancer is inappropriate, and decision-making should be shared with the patients and their families, preferably through a multidisciplinary team approach. Thrombi retrieved from patients with stroke caused by cancer-related hypercoagulability have unique characteristics, being predominantly platelet rich and difficult to retrieve. Preprocedural imaging and serum biomarkers, including the hyperdense vessel sign on non-contrast CT, susceptibility vessel sign on T2* or susceptibility-weighted MRI, three-territory sign on MRI, and D-dimer levels, are valuable in evaluating the stroke subtype and thrombus features. Thrombectomy techniques, such as contact aspiration and stent retriever monotherapy, have shown varying degrees of effectiveness for stroke caused by cancer-related hypercoagulability, warranting further study. After reperfusion therapy, appropriate treatment for the prevention of stroke recurrence should be initiated, considering the specific stroke subtypes. In conclusion, cancer-associated stroke encompasses diverse subtypes, and thrombi associated with stroke caused by cancer-related hypercoagulability present various challenges for thrombectomy. Individualized treatment approaches based on underlying mechanisms are essential for improving outcomes in acute stroke patients with active cancer. Optimization of preprocedural diagnosis, EVT techniques, and secondary prevention of stroke caused by cancer-related hypercoagulability will lead to better management of these patients and enhance their quality of life.
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Affiliation(s)
- Mikito Hayakawa
- Department of Stroke and Cerebrovascular Diseases, University of Tsukuba Hospital, Tsukuba, Ibaraki, Japan
- Department of Neurology, Institute of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
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Xu Y, Wu Z, Xu H. Cancer-related cryptogenic stroke involving the bilateral anterior and the posterior circulations: Diagnostic value of clinical and imaging characteristics. Front Neurol 2022; 13:1032984. [PMID: 36578305 PMCID: PMC9790910 DOI: 10.3389/fneur.2022.1032984] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 11/17/2022] [Indexed: 12/14/2022] Open
Abstract
Objectives This study analyzed the clinical and imaging characteristics of patients with cancer-related cryptogenic stroke (CCS) involving the bilateral anterior and the posterior circulations (three circulations) and evaluate the diagnostic value of clinical and imaging features for patients with cryptogenic stroke involving three circulations (CST). Methods Of the 12,580 patients with acute ischemic stroke, 148 patients with CST from May 2017 to November 2021 were divided into the cancer group (n = 81) and the non-cancer group (n = 67). Cardiovascular risk factors, diffusion-weighted imaging patterns of cryptogenic stroke, blood routine, coagulation routine, and biochemical routine were compared between the two groups. Multivariable logistic regression and receiver operating characteristic (ROC) curve analysis were used to determine associations between the two groups. Results Compared with the non-cancer group, the cancer group exhibited higher D-dimer levels (P < 0.001), fibrin degradation product (FDP, P < 0.001), international normalized ratio (INR, P = 0.014), neutrophil to lymphocyte ratio (NLR, P < 0.001), platelets to lymphocyte ratio (PLR, P = 0.001), activated partial thromboplastin time (APTT, P = 0.039), more frequent multiple lesions in three circulations (P < 0.001) and lower lymphocytes (P < 0.001), red blood cells (P < 0.001), and thrombin time (TT, P = 0.034). Furthermore, D-dimer [area under the curve (AUC) = 0.915, P < 0.001)], FDP (AUC = 0.923, P < 0.001), INR (AUC = 0.617, P = 0.014), NLR (AUC = 0.700, P < 0.001), PLR (AUC = 0.658, P = 0.001), and multiple lesions in three circulations (AUC = 0.786, P < 0.001) had potential diagnostic value in cryptogenic stroke. When combining these 6 parameters, the predictive power was improved (AUC = 0.949, P < 0.001). Conclusion Cryptogenic stroke involving three circulations with cancer has unique clinical features, and these potential diagnostic indicators could help patients identify CCS earlier.
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Affiliation(s)
- Yifan Xu
- Department of Radiology, Affiliated Hospital 4 of Nantong University, Yancheng, China,Department of Radiology, Yancheng First People's Hospital, Yancheng, China
| | - Zhuang Wu
- Neurotoxin Research Center of Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Department of Neurology, Tongji Hospital, School of Medicine, Tongji University, Shanghai, China,Zhuang Wu
| | - Hang Xu
- Department of Neurology, Jiangsu University Affiliated People's Hospital, Zhenjiang, China,Department of Neurology, Zhenjiang First People's Hospital, Zhenjiang, China,*Correspondence: Hang Xu
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Chen YJ, Dong RG, Zhang MM, Sheng C, Guo PF, Sun J. Cancer-related stroke: Exploring personalized therapy strategies. Brain Behav 2022; 12:e2738. [PMID: 35938982 PMCID: PMC9480895 DOI: 10.1002/brb3.2738] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 07/01/2022] [Accepted: 07/07/2022] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Cancer and ischemic stroke are two common diseases that threaten human health and have become the main causes of death in the world. It is estimated that one-in-ten patients with ischemic stroke have concomitant cancer, and this incidence is expected to increase as improvements in medical technology extends the life expectancy of cancer patients. DISCUSSION Cancer-related stroke (CRS) refers to unexplained ischemic stroke in patients with active cancer that cannot be explained by current stroke mechanisms. Available evidence suggests that CRS accounts for 5-10% of embolic stroke of undetermined source (ESUS). Although the incidence of CRS is gradually increasing, its underlying pathogenesis remains unclear. Also, there is no consensus on acute treatment and secondary prevention of stroke. CONCLUSION In this review, we retrospectively analyzed the incidence, mechanisms of CRS, its potential as a new stroke subtype, options for acute treatment, secondary prevention strategies, and disease progression, with the aim of attempting to explore personalized therapy strategies.
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Affiliation(s)
- Yu-Jie Chen
- Department of Neurological Rehabilitation, Xuzhou Central Hospital, Xuzhou city, P.R. China
| | - Rui-Guo Dong
- Department of Neurology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou city, P.R. China
| | - Meng-Meng Zhang
- Department of Neurological Rehabilitation, Xuzhou Central Hospital, Xuzhou city, P.R. China
| | - Chao Sheng
- Department of Neurological Rehabilitation, Xuzhou Central Hospital, Xuzhou city, P.R. China
| | - Peng-Fei Guo
- Department of Neurological Rehabilitation, Xuzhou Central Hospital, Xuzhou city, P.R. China
| | - Jie Sun
- Department of Neurological Rehabilitation, Xuzhou Central Hospital, Xuzhou city, P.R. China
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Santos RP, Tovar AM, Oliveira MR, Piquet AA, Capillé NV, Oliveira SN, Correia AH, Farias JN, Vilanova E, Mourão PA. Pharmacokinetic, Hemostatic, and Anticancer Properties of a Low-Anticoagulant Bovine Heparin. TH OPEN 2022; 6:e114-e123. [DOI: 10.1055/s-0042-1745743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 01/20/2022] [Indexed: 10/18/2022] Open
Abstract
AbstractHeparin is a centennial anticoagulant drug broadly employed for treatment and prophylaxis of thromboembolic conditions. Although unfractionated heparin (UFH) has already been shown to have remarkable pharmacological potential for treating a variety of diseases unrelated with thromboembolism, including cancer, atherosclerosis, inflammation, and virus infections, its high anticoagulant potency makes the doses necessary to exert non-hemostatic effects unsafe due to an elevated bleeding risk. Our group recently developed a new low-anticoagulant bovine heparin (LABH) bearing the same disaccharide building blocks of the UFH gold standard sourced from porcine mucosa (HPI) but with anticoagulant potency approximately 85% lower (approximately 25 and 180 Heparin International Units [IU]/mg). In the present work, we investigated the pharmacokinetics profile, bleeding potential, and anticancer properties of LABH administered subcutaneous into mice. LABH showed pharmacokinetics profile similar to HPI but different from the low-molecular weight heparin (LMWH) enoxaparin and diminished bleeding potential, even at high doses. Subcutaneous treatment with LABH delays the early progression of Lewis lung carcinoma, improves survival, and brings beneficial health outcomes to the mice, without the advent of adverse effects (hemorrhage/mortality) seen in the animals treated with HPI. These results demonstrate that LABH is a promising candidate for prospecting new therapeutic uses for UFH.
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Affiliation(s)
- Roberto P. Santos
- Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Laboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ana M.F. Tovar
- Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Laboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcos R. Oliveira
- Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Laboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Adriana A. Piquet
- Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Laboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Nina V. Capillé
- Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Laboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Stephan N.M.C.G. Oliveira
- Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Laboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ana H. Correia
- Hospital Universitário Clementino Fraga Filho, Serviço de Anatomia Patológica, Hospital Universitário Clementino Fraga Filho, Rio de Janeiro, Brazil
| | - José N. Farias
- Hospital Universitário Clementino Fraga Filho, Laboratório Multidisciplinar de Pesquisa, Hospital Universitário Clementino Fraga Filho, Rio de Janeiro, Brazil
| | - Eduardo Vilanova
- Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Laboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Paulo A.S. Mourão
- Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Laboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho and Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Santos R, Tovar AM, Oliveira M, Piquet AA, Capille NVM, Oliveira SNM, Correia A, Farias J, Vilanova E, Mourão PA. Pharmacokinetic, hemostatic and anticancer properties of a low-anticoagulant bovine heparin. TH OPEN 2022. [PMID: 35707626 PMCID: PMC9135479 DOI: 10.1055/a-1750-1300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Heparin is a centennial anticoagulant drug broadly employed for treatment and prophylaxis of thromboembolic conditions. Although unfractionated heparin (UFH) has already been shown to have remarkable pharmacological potential for treating a variety of diseases unrelated with thromboembolism, including cancer, atherosclerosis, inflammation, and virus infections, its high anticoagulant potency makes the doses necessary to exert non-hemostatic effects unsafe due to an elevated bleeding risk. Our group recently developed a new low-anticoagulant bovine heparin (LABH) bearing the same disaccharide building blocks of the UFH gold standard sourced from porcine mucosa (HPI) but with anticoagulant potency approximately 85% lower (approximately 25 and 180 Heparin International Units [IU]/mg). In the present work, we investigated the pharmacokinetics profile, bleeding potential, and anticancer properties of LABH administered subcutaneous into mice. LABH showed pharmacokinetics profile similar to HPI but different from the low-molecular weight heparin (LMWH) enoxaparin and diminished bleeding potential, even at high doses. Subcutaneous treatment with LABH delays the early progression of Lewis lung carcinoma, improves survival, and brings beneficial health outcomes to the mice, without the advent of adverse effects (hemorrhage/mortality) seen in the animals treated with HPI. These results demonstrate that LABH is a promising candidate for prospecting new therapeutic uses for UFH.
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Affiliation(s)
- Roberto Santos
- Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ana M.F. Tovar
- Instituto de Bioquimica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcos Oliveira
- Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Adriana A. Piquet
- Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Nina VM Capille
- Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Ana Correia
- HUCFF, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - José Farias
- HUCFF, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Eduardo Vilanova
- Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Paulo A.S. Mourão
- Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Arnold CE, Department of Neurology, Lenox Hill Hospital, New York, NY, USA. A Review of Potential Mechanisms of Cryptogenic Stroke and a Recommended Approach to Diagnosis. Neurology 2021. [DOI: 10.17925/usn.2021.17.2.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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