Immune Thrombocytopenic Purpura Patients Research Articles

Immune Thrombocytopenic Purpura and Intracranial Stenting.

Patients with immune thrombocytopenic purpura (ITP) presenting with indications for dual antiplatelet therapy (DAPT) can be difficult to manage due to the precarious balance of managing the need for increased platelet counts as well as inhibition of platelet activity. This case represents a 65year old woman with ITP who presented with a bilateral subarachnoid hemorrhage secondary to a left ophthalmic aneurysm that required placement of a pipeline embolization device (PED) necessitating DAPT. After treatment of her ITP with pulse dexamethasone for fourdays, she was safely discharged on onemonth of DAPT with aspirin and ticagrelor then switched to aspirin monotherapy without any immediate complications. During her period of DAPT, she did not receive additional medical treatment for her ITP. This case successfully presents a high-risk ITP patient requiring DAPT for a neurosurgical procedure and illustrates that these patients can be safely and successfully treated with DAPT once their ITP is stabilized.

Evaluation of the hematological inflammatory parameters in the patients with immune thrombocytopenic purpura: A case-control study.

Inflammation is one of the immune thrombocytopenic purpura (ITP)'s aggravating elements due to inflammatory cells' function. This study aims to identify and evaluate hematological inflammatory parameters, including neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), and hemoglobin-to-platelet ratio (HPR), in patients with ITP compared to the control group. We retrospectively analyzed the profile of 190 ITP patients from August 2019 to January 2021 at Imam Reza Hospital of Mashhad, Iran, along with 100 healthy individuals who had no ITP-related clinical or laboratory symptoms. Immune cell counts, NLR, PLR, and HPR were calculated using the complete blood count at the time of diagnosis and after the treatment. The results were analyzed through MedCalc, SPSS software, and the receiver operating characteristiccurve. The result showed that white blood cell (WBC) and neutrophil counts were higher in ITP patients (WBC: p: 0.001, neutrophil: p: 0.001), and conversely, platelet and lymphocyte counts were higher in the control group compared to ITP patients (platelets: p: 0.001, lymphocytes: p: 0.001). The indices analysis between the two groups revealed that NLR was significantly increased in ITP patients (p: 0.001), but PLR was significantly reduced in ITP patients (with the mean platelet count of 23.44 ± 35.26 × 109/L) compared to the control group (with the mean platelet count of 234.04 ± 55.88 × 109/L). The HPR index also significantly increased in ITP patients (p: 0.001). An increase in NLR, PLR, and a decrease in HPR can be considered a valuable diagnostic algorithm in patients with ITP.

Autoimmune Cytopenias Are Highly Associated with Inborn Errors of Immunity and They May Be the Initial Presentations in Cases without Severe Infections

Introduction: Inborn errors of immunity (IEIs) are inherited disorders that present with increased susceptibility to infections as well as noninfectious complications. Due to the aberrant immune functions of patients with IEI, autoimmune cytopenia (AIC) may be the initial finding, which makes diagnosis a challenge. We aimed to evaluate the clinical course, laboratory findings, and treatment response of AIC in children with IEI. Methods: Data of children with autoimmune hemolytic anemia (AIHA) and/or immune thrombocytopenic purpura (ITP) were obtained from a retrospective chart review of IEI patients diagnosed and followed in our center. Demographic and clinical features and therapeutic outcomes were evaluated. Immunologic findings were compared between patients with AIHA, ITP, and Evans syndrome (ES). The patients were also divided into two subgroups based on the presence or absence of immune dysregulation diseases (IDDs), and all data were compared between these two groups. Results: Out of 562 patients with IEI, 6% (n: 34) had AIC which were ITP (23.5%), AIHA (35.5%), and ES (41.2%). AIC was the initial finding in 50% of these 34 patients. Patients with ES had a higher mean percentage of CD8+ T lymphocytes than ITP patients (40.77 ± 20.21% vs. 22.33 ± 12.48%, p = 0.011). Patients with IDDs were more likely to develop ES (p = 0.004), lymphoproliferation (p = 0.005), and resistance to first-line therapy (p = 0.021) than other IEI groups. Conclusion: This study shows that AIC may be the initial finding of IEI, particularly when lymphoproliferation and resistance to first-line therapy co-occur. Therefore, detailed investigation should be offered to all patients to avoid diagnostic delay.

The diagnostic accuracy of mean platelet volume in differentiating immune thrombocytopenic purpura from hypo-productive thrombocytopenia: A systematic review and meta-analysis.

Thrombocytopenia is defined as a decreased number of platelets in the circulating blood as a result of hypo-proliferation in marrow or peripheral destruction of platelets. Several diagnostic methods have been proposed to discriminate the underline cause of thrombocytopenia. Recent studies showed that mean platelet volume (MPV) could be used for differential diagnosis of immune thrombocytopenic purpura (ITP). Thus, we aimed to investigate the diagnostic accuracy of MPV for differential diagnosis of ITP from hypo-productive thrombocytopenia. This study was conducted in accordance with the Preferred Reporting Items for Systematic Review and Meta-Analysis guidelines (PRISMA). The study protocol was registered on PROSPERO with the reference number CRD42023447789. Relevant published studies that were published up to April 10, 2023, in peer-reviewed journals were searched on electronic different databases. The methodological quality of the included studies was appraised using the quality assessment of diagnostic accuracy studies 2 (QADAS-2) tool. The pooled weight mean difference (WMD) of MPV between the ITP group and hypo-productive group was analyzed using a random-effects model meta-analysis. Relevant data were extracted using a Microsoft Excel spreadsheet and analyzed using STATA 11.0 and Meta-disc 1.4 software. Publication bias was evaluated using Deek's funnel plot asymmetry test. A total of 14 articles were included in this systematic review and meta-analysis. The comparison of MPV between groups revealed that the pooled mean value of MPV increased significantly in ITP patients compared to patients with hypo-productive thrombocytopenia (WMD = 2.03; 95% CI, 1.38-2.69). The pooled sensitivity and specificity of MPV in differentiating ITP from hypo-productive thrombocytopenia were 76.0% (95% CI: 71.0%, 80.0%) and 79.0% (95% CI: 75.0%, 83.0%), respectively. The summary positive likelihood ratio (PLR) and negative likelihood ratio (NLR)using the random effects model were 3.89 (95% CI: 2.49, 6.10) and 0.29 (95% CI: 0.18, 0.46), respectively. MPV can be used to discriminate ITP from hypo-productive thrombocytopenia. It can possess large advantages as it is noninvasive, simple, quick, inexpensive, easy to perform, reliable, and routinely generated by automated cell counters.

Mortality and Comorbidities of Covid-19 Patients with Immune Thrombocytopenic Purpura - a Review of the National Database 2019-2020

Introduction: Immune thrombocytopenic purpura (ITP) is a diagnosis of exclusion that is characterized by isolated thrombocytopenia with a generalized purpuric rash. If there is a known case for the ITP, it is referred to as secondary ITP. Secondary ITP may often be caused by drugs, systemic immunologic, or infectious diseases. Covid-19 is a disease caused by the SARS-CoV-2 virus, which caused a pandemic in 2020, affecting hundreds of millions of people worldwide. There have been several different hematologic conditions associated with this viral infection, including deep vein thromboses, pulmonary emboli, and many patients with ITP induced by Covid-19. With several case reports and case series available on these patients, the specifics behind the strength of the association, mortality of the patients, and their comorbidities have not been previously explored. Methods: Using the national inpatient sample from the years 2019-2020, we analyzed adult hospitalized patients with ITP and Covid-19 based on their International Classification of Diseases - 10 clinical modification codes. We calculated the odds ratios for patients with Covid-19 being diagnosed with ITP compared to other hospitalized patients. Additionally, we calculated the odds of several complications, treatments, as well as concurrent conditions in patients with Covid-19 and ITP. The complications measured were epistaxis or hemoptysis, intracranial hemorrhage (ICH), non-intracranial hemorrhage (nICH), deep vein thrombosis (DVT), pulmonary embolism (PE), and death. Treatments measured were transfusion with either red blood cells (RBC) or platelets. The concurrent conditions evaluated were systemic lupus erythematosus (SLE), hepatitis C and heparin-induced thrombocytopenia (HIT). Results Out of the 115,150 hospitalized patients with ITP included in the database, 0.02% of them were diagnosed with Covid-19. The odds of a patient with Covid-19 being diagnosed with ITP were lower than those for other hospitalized patients (OR=0.860 [0.787-0.941], p=0.001). The mean age for patients with ITP diagnosed with Covid-19 was 64.1 compared to 60.9 in patients without Covid-19 (p=0.001). Hospitalized patients with ITP who were also diagnosed with Covid-19 were at a higher risk of developing epistaxis (OR: 1.45 [1.01-2.07], p=0.042), pulmonary embolism (OR: 2.22 [1.35-3.66], p=0.002), and death (OR: 4.39 [3.33-5.80], p<0.001) compared to those without Covid-19. They were not at higher odds of developing a DVT (OR: 1.25 [0.798-1.97], p=0.325), ICH (OR: 0.158 [0.0160-1.56], 0.114) or nICH (OR: 1.03 [0.678-1.55], p=0.905). They were not significantly more or less likely to get transfused with RBC (OR: 0.816 [0.585-1.14], p=0.231) or platelets (OR: 1.14 [0.865-1.53], p=0.337). The ITP patients with concurrent Covid-19 were also not more likely to suffer from SLE (OR: 0.737 [0.453-1.20], p= 0.222), Hepatitis C (OR: 0.760 [0.392-1.47], 0.416), or HIT (OR: 1.16 [0.181-7.49], p=0.872). Conclusion Hospitalized patients with Covid-19 were at a lower risk of being diagnosed with concurrent ITP than other hospitalized Covid-19 patients. Those with ITP who also had Covid 19 had significantly higher odds of complication of bleeding with epistaxis or hemoptysis as well as a higher risk of pulmonary embolism and death. However, they were not at higher risk of hemorrhage elsewhere or DVT. They were not treated with transfusions differently and having SLE, hepatitis C or HIT did not place hospitalized patients with ITP at a higher risk of developing Covid-19.

Utility of Immature Platelet Fraction as Diagnostic Biomarker for Isolated Thrombocytopenia

Objective: To evaluate the utility of immature platelet fraction (IPF) as a marker in immune thrombocytopenia purpura (ITP) patients. Study Design: Comparative cross-sectional study. Place and Duration of Study: Department of Haematology, Chughtai Institute of Pathology, Lahore Pakistan, from Aug to Nov 2020. Methodology: Sixty patients (Group-1) of immune thrombocytopenia purpura were selected. Sixty healthy individuals (Group-2) with normal blood count parameters were also included. A complete blood count with simultaneous evaluation of immature platelet fraction was performed for both groups on 3ml peripheral blood collected in K2EDTA. To check the reproducibility of results, each sample was run in duplicate. Results: Group-1 had a mean platelet count of 43.77±32.82 x109 /L (range 2-98x109/L), a mean immature platelet fraction of 12.93±6.11% (range 3–25%) and a mean age 36.68±7.53 years, (range 22–56 years). Group-2 had a mean platelet count of 251.7±83.55 x109 /L (range 150-450 x109 /L), a mean immature platelet fraction of 3.78±1.86 %, (range 1-7.2%) and a mean age of 36.42±6.94 years, (range 22–55 years). ROC curve analysis yielded an immature platelet fraction value of 7.0% as the cut-off between immune thrombocytopenic purpura patients and healthy individuals. Conclusion: Immature platelet fraction, though novel, is a useful marker to diagnose and monitor treatment response, diagnosis and management of immune thrombocytopenic purpura.

The Frequency of Immune Thrombocytopenic Purpura in Collagen Vascular Disorders

Background: Many rheumatologic conditions are associated with thrombocytopenia due to antibody-mediated platelet destruction. Knowing the rate of ITP patients who develop vascular collagen diseases and the developed type can help predict future treatments and even take preventive measures. Objectives: This study aimed to know the frequency of immune thrombocytopenic purpura (ITP) in collagen vascular disorders. Methods: The present retrospective cross-sectional study was conducted in 2020 on the health records of 447 eligible patients. First, the patient’s details, such as age, gender, marital status, age at diagnosis, time from the diagnosis of ITP to the development of lupus, and the patients’ ANA and anti-dsDNA test results, were extracted from their records and entered into the preparation checklist. Finally, the data were entered into SPSS-23 and analyzed at a statistically significant level of 0.05. Results: The mean interval between the initial diagnosis of ITP and vascular collagen disease diagnosis was 2.1 ± 0.9 years. The records of 336 patients with systemic lupus erythematosus (SLE) were also assessed, of whom 15 (4.5%) had first developed ITP and then lupus. Hence, of the 447 patients included in the study, 17 (3.8%) with a history of ITP then developed lupus. Conclusions: Comparing the present findings with the results of other studies shows that Iranian patients with ITP develop vascular collagen disease at a lower rate.

Ayurvedic management of immune thrombocytopenic purpura - a case report

Immune thrombocytopenic purpura (ITP) is a bleeding disorder characterized by isolated thrombocytopenia. The course is more chronic in adults associated with higher mortality in older patients. In extreme cases of ITP, serious complications such as bleeding into the lungs, brain, or other vital organs can occur. Clinical manifestations include purpura, petechiae and ecchymosis. Majority of ITP patients are not getting reliable and durable remissions with modern medicine. The present case report deals with an elderly patient having chronic ITP with multiple comorbidities (obesity, schizophrenia, UTI and T2DM) approached for Ayurvedic treatment. Patient came with ecchymotic patches on both upper extremities with extremely low platelet counts (9700/mcL) was diagnosed as Tiryaggata Raktapitta and Ayurvedic treatment has been provided. Ayurvedic formulations (Putapakwa Vishama Jwarantaka Loha, Raktastambhaka Vati, Samshamani Vati etc) have improved the platelet counts (from the lowest count of 9700/mcL to highest count of 50000/mcL), hematological indices and quality of life in present case. Ecchymotic patches were completely disappeared without any further recurrences. The present case of ITP (Raktapitta) is a good example for Nidaanaarthakara Roga as it has manifested due to the consequences of malarial fever (Vishama Jwara). Ayurvedic treatment seems to be promising in the management of chronic ITP and generates hope for those patients who are having extreme thrombocytopenia, multiple comorbidities, reluctant (or unfit) for corticosteroids and invasive diagnostic procedures like bone marrow biopsy, and not satisfied with the available therapy from other systems of medicine. Further clinical trials with large sample size are required to substantiate the present case study findings.

Correlation and outcome of Vitamin D polymorphism in Primary Immune Thrombocytopenic purpura patients under Eltrombopag therapy

Correlation and outcome of Vitamin D polymorphism in Primary Immune Thrombocytopenic purpura patients under Eltrombopag therapy

CD44, CD90 and CD96 expression in immune thrombocytopenia purpura (ITP) patients

ABSTRACT Studying the expression of hematopoietic stem cell markers from different sources might be useful in understanding stem cell biology in different niche conditions. The study aimed to assess the difference in cell surface markers (CD44, CD90, CD96) on hematopoietic stem cells in three different niche conditions; umbilical cord blood (UCB), normal bone marrow (NBM) and bone marrow samples from idiopathic (immune) thrombocytopenic purpura (IBM). This study was conducted on 300 cases divided into three study groups; 100 umbilical cord blood units collected from mothers undergoing cesarian section in gynecology and obstetrics department, 100 bone marrow samples from idiopathic (immune) thrombocytopenic purpura patients collected from university children hospital and 100 normal bone marrow samples with no evidence of disease in bone marrow tissue. CD44 was significantly elevated in UCB and NBM groups compared to IBM group (<0.001). There was also a significant elevation of CD90 and CD96 in IBM group compared to NBM group and UCB (<0.001). CD90 and CD96 play a role in the pathogenesis of ITP disorder and could be applied as a targeted therapy to improve the outcome of this disease.

Role of Long non Coding RNAs, NEAT1 and Lnc-DC Expression in Pediatric Immune Thrombocytopenic Purpura.

Pediatric immune thrombocytopenic purpura (ITP) is an autoimmune disease; whose etiology is unknown. lncRNAs are regulators of numerous actions, which participate in the development of autoimmune diseases. We evaluated the expression ofNEAT1 and Lnc-RNA in dendritic cell (Lnc-DC) in pediatric ITP. Sixty ITP patients and 60 healthy subjects were enrolled in the present study; Real-time PCR was performed to assess the expression levels of NEAT1 and Lnc-DC in sera of children with ITP as well as healthy children. Both lncRNAs, NEAT1 and Lnc-DC were significantly upregulated in ITP patients in comparison to controls (p <0.0001 and P= 0.001 respectively). Furthermore, significant upregulation of the expression levels of NEAT1 and Lnc-DC were observed in the non-chronic compared with chronic ITP patients. Also, there was significant negative correlation between each of NEAT1 and Lnc-DC and platelet counts before treatment (r= -0.38; P= 0.003 and r= -0.461; P< 0.0001, respectively). serum lncRNAs, NEAT1 and Lnc-DC could be used as potential biomarkers in differentiating childhood ITP patients and healthy controls in addition to differentiating non-chronic from chronic ITP which may provide a theoretical basis for the mechanism and treatment of immune thrombocytopenia.

Safety and Efficacy of Tyrosine Kinase Inhibitors in Immune Thrombocytopenic Purpura: A Systematic Review of Clinical Trials

Immune thrombocytopenic purpura (ITP) is an acquired antibody or cell-mediated platelet damage or decreased platelet production. Steroids, IV immunoglobulins (IVIG), and Rho-anti-D antibodies are the commonly used initial treatments for ITP. However, many ITP patients either do not respond or do not maintain a response to initial therapy. Splenectomy, rituximab, and thrombomimetics are the commonly used second-line treatment. More treatment options include tyrosine kinases inhibitors (TKI), including spleen tyrosine kinase (Syk) and Bruton's tyrosine kinase (BTK) inhibitors. This review aims to assess the safety and efficacy of TKIs. Methods: Literature was searched on PubMed, Embase, WOS, and clinicaltrials.gov using keywords, "tyrosine kinase" and "idiopathic thrombocytopenic purpura". PRISMA guidelines were followed. Results: In total, 4 clinical trials were included with 255 adult patients with relapsed/refractory ITP. In all, 101 (39.6%) patients were treated with fostamatinib, 60 (23%) patients with rilzabrutinib, and 34 (13%) with HMPL-523. Patients treated with fostamatinib achieved a stable response (SR) and overall response (OR) in 18/101 (17.8%) and 43/101 (42.5%) of the patients, respectively, while SR and OR were achieved in 1/49 (2%) and 7/49 (14%) of the patients, respectively, in the placebo group. Patients treated with HMPL-523 (300 mg dose expansion) achieved an SR and OR in 5/20 (25%) and 11/20 (55%) of the patients, respectively, while SR and OR were achieved in 1/11 (9%) of the patients treated with the placebo. Patients treated with rilzabrutinib achieved an SR in 17/60 (28%) patients. Dizziness (1%), hypertension (2%), diarrhea (1%), and neutropenia (1%) were serious adverse events in fostamatinib patients. Rilzabrutinib or HMPL-523 patients did not require a dose reduction due to drug-related adverse effects. Conclusions: Rilzabrutinib, fostamatinib, and HMPL-523 were safe and effective in the treatment of relapsed/refractory ITP.

Biomarkers for predicting response to corticosteroid therapy for immune thrombocytopenic purpura.

Patients with immune thrombocytopenic purpura (ITP) often receive corticosteroids as a first-line treatment strategy. The ability to predict the therapeutic response to corticosteroids before initiating treatment would reduce the risk of adverse events, but biomarkers of this parameter have not yet been established. Here, in a single-centre, retrospective, cohort study of 127 ITP patients who received corticosteroids as first-line treatment, we compared several characteristics and test results between those patients with a favourable response to corticosteroids (responder cohort, n= 68) and those with a poor response to corticosteroids (non-responder cohort, n= 59) to identify potential biomarkers that were predictive of corticosteroid response. We extracted six factors as indicative of poor response to corticosteroid therapy for ITP: old age (≥81 years) (odds ratio [OR], 2.44; p= 0.02); low platelet count (<9 × 109 /L) (OR, 2.25; p= 0.02); high level of platelet-associated IgG (≥445 ng/107 cells) (OR, 3.95; p< 0.01), high platelet distribution width (≥ 14.0g/dL) (OR, 2.00; p= 0.03), high lymphocyte-to-monocyte ratio (≥ 3.52) (OR, 1.40, p= 0.04), and low megakaryocyte count in bone marrow (< 85.5/μl) (OR, 1.72; p= 0.04). Thus, our present data support the fact that these six factors are useful biomarkers for predicting corticosteroid response in patients with ITP.

Analysis of anti-SARS-CoV-2 IgG antibody titers after mRNA booster vaccination in patients with nonmalignant hematological disorders

In our facility, anti-SARS-CoV-2 mRNA vaccines were given to 21 patients, including 8 with aplastic anemia (AA), 3 with pure red cell aplasia (PRCA), and 10 with immune thrombocytopenic purpura (ITP), and IgG antibody titers were assessed one month after vaccinations. After receiving both a second vaccine and a booster shot, all patients with AA/PRCA treated with cyclosporine A aside from one, had IgG titers that were lower than the median levels of healthy controls. Even if prednisolone (PSL) doses did not go over 10 mg/day, ITP patients receiving PSL therapy were unable to achieve adequate levels of IgG after booster immunizations.

Helicobacter pylori: A Belittled Cause of Immune Thrombocytopenic Purpura (ITP) and Role of Helicobacter pylori Eradication Therapy for Treating ITP

Immune thrombocytopenic purpura (ITP) is an autoimmune disease characterized by production of auto antibodies against platelet surface antigens. ITP affects women more often than men and is more common in children than adults. ITP is a diagnosis of exclusion after other identifiable etiologies have been ruled out. After the first report by Gasbarrini et al. (1998) showing rising platelet counts in ITP patients following Helicobacter pylori (HP) eradication therapy, there is growing evidence that highlights the role of HP in triggering ITP. The H-pylori infection induced ITP is validated by many proposed mechanisms such as molecular mimicry due to production of auto antibodies against H-pylori surface virulent factors (CagA) and cross reactivity of these antibodies with platelet surface antigens (GP IIb/IIIa, GP Ib/IX, and GP Ia/IIa), phagocytic perturbation due to enhanced phagocytic activity of monocytes, enhanced dendritic cell numbers and response, platelets aggregation due to presence of anti- H-pylori IgG and von Willebrand factor (vWf) and finally host immune response against H-pylori virulent factors CagA and VacA leading to ITP. Eradication of Helicobacter pylori infection has been variably associated with a platelet response in patients with immune thrombocytopenic purpura (ITP). Eradication therapy is simple and inexpensive, with limited toxicity and the advantage of avoiding long-term immunosuppressive treatment for those who respond. Although the evidence and follow-up are limited, it appears reasonable to routinely screen patients with ITP for H pylori, particularly in those populations with a high background prevalence of H pylori infection.

A Retrospective Analysis of Bone Marrow Examination Results from a Single Center Institution: In What Situations Is Bone Marrow Examination Helpful?

Objective: Bone marrow (BM) examinations are performed to evaluate hematological abnormalities. Focusing on patients with cytopenia, we aimed to determine the circumstances under which a BM examination can assist in the diagnosis of hematologic diseases.Methods: The medical records of 738 patients who underwent BM examination from March 2011 to March 2019 at Soonchunhyang University Seoul Hospital were reviewed. In total, 234 patients underwent a BM examination to identify the cause of cytopenia. Excluded from the analysis were BM examinations performed to diagnose specific diseases and evaluate disease status.Results: Results suggesting suboptimal outcome (n=6) or BM invasion of solid tumors (n=13) were excluded. Immune thrombocytopenic purpura patients (n=52) with normal BM examination results were also excluded. One hundred sixty-three patients who underwent BM examination to determine the cause of cytopenia were included in the analysis. A comparison of non-specific results (n=56) to those pointing to an underlying hematologic disease (n=107) showed that patients with severe neutropenia or severe thrombocytopenia were more likely to be diagnosed with a hematologic disease. Specifically, as the number of severe cytopenias increased, the likelihood of a hematologic disease diagnosis was significantly augmented. Patients with end-stage renal disease, autoimmune disease, or liver cirrhosis were more likely to receive non-specific results.Conclusion: In conclusion, seeking the underlying disease or drug should be a primary target for patients with cytopenia. In cases of severe cytopenia in more than one lineage, BM examination should be strongly considered to diagnose an underlying hematologic disease.

Immune Thrombocytopenia Purpura Relapse in Patients Who Received mRNA COVID-19 Vaccines

Background: Immune thrombocytopenic purpura (ITP) is a syndrome in which platelets become coated with autoantibodies to platelet membrane antigens. The mononuclear macrophage system of the spleen is responsible for removing platelets in ITP. This leads to a decrease in circulating platelet count and propensity for bleeding. Patients usually present with bruising and mucosal bleeding, with a minority of cases developing major bleeding complications such as intracranial hemorrhage. Cases of ITP and ITP relapse have been reported in people who received the mRNA SARS-CoV-2 vaccine, most reported cases present with bruising and mucosal bleeding in the first few weeks after receiving the vaccine, nevertheless, the causal relationship is not yet proved. Objectives: This study aims to prove the causal relationship betweenITP relapse in known ITP patients and the mRNA covid vaccine. And to evaluate the long-term effect of the vaccine on ITP patients > 6 months after receiving the second dose. Methods a retrospective study was conducted to check platelet count in 67 patients known for immune thrombocytopenia purpura, who are >18-year- old, and not known for any other causes of thrombocytopenia (including congenital thrombocytopenia, malignancy, SLE, anti-phospholipid syndrome). The platelet count was identified at baseline before receiving the vaccine and within 3 months, 6 months, and after 6 months after receiving the vaccine. Results: The results showed that 6% of ITP patients had ITP relapse within the first 3 months after the mRNA covid vaccine, 10% of patients had a relapse within the first 6 months and another 8% had a relapse more than 6 months after receiving the vaccine. on follow-up for the patient who didn't have a frank relapse, within the first 6 months after receiving the vaccine 8% of patients had more than 50% reduction from their baseline platelet count and 6% had a 25-50% reduction in the platelets count. on follow-up more than 6 months after the vaccine,4% of patients had more than 50% reduction in platelet count and 3% had a 25-50% reduction from their baseline platelet count. There was no statically significant difference between Moderna and Pfizer vaccine on ITP relapse rate or platelet count reduction. Conclusion mRNA covid vaccine increases the risk of ITP relapse and leads to a reduction in platelets count compared to the baseline count before receiving the vaccine, with no statically significant difference between Pfizer and Moderna vaccines. Figure 1View largeDownload PPTFigure 1View largeDownload PPT Close modal

Blockage of CD72 reduces B cell proliferation in immune thrombocytopenic purpura, involving interleukin 1 and macrophage migration inhibitory factor secretion

ABSTRACT Aim This study aims to explore the expression and role of CD72 in B lymphocytes in immune thrombocytopenic purpura (ITP). Methods The expression level of CD72 in B lymphocytes was detected by flow cytometry in 18 ITP patients and 19 controls of healthy donor or iron-deficiency anemia patients. B cell proliferation was determined by 5-bromo-2′-deoxyuridine incorporation (BrdU) in the culture of 17 ITP patients’ and 11 controls’ peripheral mononuclear cells (PMNCs). The secretion levels of antibodies against human platelet antigens (HPA), as well as B cell proliferation-related cytokine interleukin 1(IL-1) and macrophage migration inhibitory factor (MIF) in culture supernatants were measured by ELISA. Results CD72 was significantly increased in B cells of newly diagnosed or persistent ITP compared with ITP in remission. B cell proliferation in culture with CD72 antibody addition was significantly decreased both in ITP patients and in controls compared with isotype antibody addition. CD72 antibody did not significantly alter HPA antibody level in ITP patients. CD72 antibody increased IL-1 and MIF levels in ITP patients’ cell culture supernatant but not in controls. Conclusion CD72 expression elevation accompanies the active status of ITP. In vitro addition of CD72 antibody has a negative impact on B cell proliferation. The function of CD72 in B cell proliferation in ITP may be related to IL-1 and MIF secretion.

Immune thrombocytopenic purpura healing after removing cardiac thrombosis

Because of the rareness of the reports about immune thrombocytopenic purpura patients undergoing cardiac surgery, there is no sufficient knowledge about perioperative strategies. In this article, we report a 42-year-old female patient with severe mitral regurgitation and large right atrial thrombus, in whom thrombocytopenia had disappeared after mitral valve replacement and thrombectomy from the right atrium. Large thrombi should kept in mind as reason of thrombocytopenia.

Impact of COVID-19 Infection, Vaccination, and Serological Response in Immune Thrombocytopenic Purpura Patients: A Single-Center Global Analysis

Both SARS-CoV-2 infection and vaccination have raised concern in immune-mediated diseases, including immune thrombocytopenic purpura (ITP) considering risk of de novo ITP development and ITP recurrence. Here, we report on data from a single-center retrospective-prospective collection aiming to evaluate platelet (plt) dynamics in patients (pts) with chronic ITP after COVID-19 infection (before and after vaccination) and after the first, second and third vaccine doses. Furthermore, we analyzed the serological response after the first two doses of COVID-19 vaccination. A total of 64 pts currently followed for chronic ITP who experienced COVD-19 infection and/or vaccination with an available plt count before and after such events were included in the analysis. A low incidence of ITP exacerbation following vaccine sessions (6-16%) was observed in comparison with a high frequency of exacerbation and rescue treatment necessity after COVID-19 infection in unvaccinated pts (83%). Moreover, the lower ITP exacerbation rate observed in infected pts previously vaccinated (18%) suggests further protective effects in this population. Finally, a high seroconversion rate was observed, confirming data reported in previously published studies on immune cytopenia and rheumatological diseases, but more evidence is awaited to establish the clinical impact of serological response.