|Year : 2020 | Volume
| Issue : 1 | Page : 32-35
Helicobacter pylori eradication therapy in patients with immune thrombocytopenic purpura: a single-center experience
Nabila Faiek, Safinaz Hussein, Reham Badr
Department of Internal Medicine, Clinical Hematology Unit, Faculty of Medicine, Assiut University, Assiut, Egypt
|Date of Submission||15-Oct-2019|
|Date of Decision||15-Oct-2019|
|Date of Acceptance||22-Oct-2019|
|Date of Web Publication||05-Feb-2020|
Clinical Hematology, Department of Internal Medicine, Assiut University, Assiut, 71516
Source of Support: None, Conflict of Interest: None
The aim was to determine the frequency of Helicobacter pylori infection in patients with immune thrombocytopenic purpura (ITP) and to detect the effect of its eradication therapy on platelet count response in H. pylori-positive patients.
Patients and methods:
H. pylori stool antigen enzyme immunoassay test was done for 54 patients with ITP. H. pylori-positive patients received standard triple therapy for 2 weeks. Platelet count response to H. pylori eradication therapy was evaluated 2 and 3 months after the treatment.
H. pylori infection was positive in 38 (70.4%) patients with ITP. Eradication of H. pylori was achieved in 30 (78.9%) patients (responder group). There were statistically significant increases in platelet count (among the responder group) after H. pylori eradication therapy at 2 and 3 months (P < 0.05).
Eradication of H. pylori infection in patients with ITP is associated with significant increase in platelet counts.
Keywords: eradication, Helicobacter pylori, immune thrombocytopenic purpura
|How to cite this article:|
Faiek N, Hussein S, Badr R. Helicobacter pylori eradication therapy in patients with immune thrombocytopenic purpura: a single-center experience. J Curr Med Res Pract 2020;5:32-5
|How to cite this URL:|
Faiek N, Hussein S, Badr R. Helicobacter pylori eradication therapy in patients with immune thrombocytopenic purpura: a single-center experience. J Curr Med Res Pract [serial online] 2020 [cited 2021 Mar 6];5:32-5. Available from: http://www.jcmrp.eg.net/text.asp?2020/5/1/32/277491
| Introduction|| |
Helicobacter pylori is a gram-negative microaerophilic bacterium that colonizes the human stomach of more than 50% of the world population. H. pylori is considered as the main agent of gastritis and peptic ulcer, and it has been connected with gastric cancer development. H. pylori was considered as a class I carcinogen by the WHO.
H. pylori infection is associated with several extragastrointestinal diseases, such as neurological (stroke, Parkinson's disease, and Alzheimer's disease), obesity, cardiovascular (ischemic heart diseases), skin disorders, and hematological diseases [unexplained iron-deficiency anemia (IDA) and immune thrombocytopenic purpura (ITP)].
ITP, an acquired immune condition, is caused by autoantibody-mediated platelet destruction. ITP is diagnosed by a low platelet count (<100 × 109/l) after exclusion of secondary causes of thrombocytopenia,, such as lymphoproliferative diseases, autoimmune disorders, drugs, and infectious diseases.
Helicobactor pylori is an important infectious agent and can cause persistence of thrombocytopenia).
The association between H. pylori and ITP has been explained by several mechanisms. One of them, antibodies against H. pylori, against cytotoxinassociated gene A (cagA) protein have been cross-reacting with platelet antigens, leading to platelet clearance. Variations in platelets response to eradication of H. pylori infection can be explained by increasing the frequency of CagA-positive strains of H. pylori in Japan than in North America.
Following colonization by H. pylori, modulation of host immunity leads to overproduction of autoreactive B cells (antiplatelets) and increases the phagocytic capacity of monocytes together with low levels of the inhibitory Fc++ receptor IIB.
After the results of Gasbarrini et al. which have shown improvement in platelet counts in H. pylori-positive patients with ITP after successful H. pylori eradication therapy, several studies from different geographical areas have evaluated this effect with highly variable results (0–100%).
The aim of this study was to determine the frequency of H. pylori infection in patients with ITP and to detect the effect of its eradication therapy on platelet count response in H. pylori-positive patients.
| Patients and Methods|| |
This prospective, observational, study was done at Clinical Hematology Unit, Internal Medicine Department, Assiut University, during the period between May 2018 and May 2019. Written informed consent was taken from all participants, and this study was approved by the Ethical Committee of Assiut University.
It included 54 patients with persistent ITP (platelet count <100 and >30 × 109/l), in the absence of secondary causes of thrombocytopenia, and previous therapy with prednisone.
H. pylori infection was detected among studied group by H. pylori stool antigen enzyme immunoassay test.
H. pylori-positive patients were given triple eradication therapy for 2 weeks (amoxicillin 1 g twice daily; clarithromycin 500 mg twice daily; proton pump inhibitor 20 mg twice daily).
Assessment of response, eradication, or persistence of H. pylori was done after 8 weeks using the H. pylori stool antigen enzyme immunoassay method.
To evaluate platelet count response to H. pylori eradication therapy, platelet counting was performed at 2 and 3 months after the treatment.
Data entry and data analysis were done using SPSS version 19 (Statistical Package for the Social Sciences, IBM corp., Armonk, NY). Data were presented as number, percentage, mean, and SD. Independent samples t-test was used to compare quantitative variables between groups. Paired samples t-test was done to compare quantitative data between before and after treatment. P value considered statistically significant when less than 0.05.
| Results|| |
Between May 2018 and May 2019, 54 patients (34 female, 20 male), with ages ranging from 19 to 55 years (mean: 34.07 ± 8.95 years) were enrolled in the study. Overall, 38 (70.4%) were positive for H. pylori and 16 (29.6%) were negative [Figure 1].
|Figure 1: Helicobacter pylori Infection among patients with immune thrombocytopenic purpura|
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At the beginning of the study, platelets counts at the beginning of the study, platelet counts in H. pylori-positive patients ranged from 30.0 to 77.0 × 109/l, with a mean of 41.38 ± 12.68, and platelet counts in H. pylori-negative patients ranged from 31.0 to 77.0 × 109/l, with a mean of 40.44 ± 11.64. There were no statistically significant difference in baseline platelet count between H. pylori-positive and H. pylori-negative patients (P = 0.799) [Table 1].
Overall, 30 (78.9%) of the 38 H. pylori-positive patients responded to eradication therapy (responder group) and eight (21.1%) did not respond (nonresponder group) [Figure 2].
|Figure 2:Percentage of response to Helicobacter pylori eradication therapy|
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Assessment of platelet count in response to the eradication therapy
Among 30 patients (responder group) who responded to H. pylori eradication therapy, there were statistically significant increase in platelet count before and after the treatment at 2 and 3 months (P< 0.05).
Platelet count before the therapy ranged from 30.0 to 77.0 × 109/l, with mean of 42.13 ± 12.98; at 2 months after treatment, ranged from 33.0 to 96.6 × 109/l, with mean of 63.87 ± 19.97; and at 3 months after treatment were, ranged 39.0 to 110.0 × 109/l, with a mean of 76.38 ± 22.11 [Table 2].
On the contrary, among eight patients (nonresponders) who did not respond to H. pylori eradication therapy, there were statistically significant decreases in platelet count before and after the treatment at 2 and 3 months (P< 0.05).
Platelet count before the therapy ranged from 30.0 to 60.0 × 109/l, with a mean of 38.56 ± 11.84, at 2 months after treatment ranged from 11.0 to 55.0 × 109/l, with a mean of 26.54 ± 16.53; and at 3 months after treatment ranged from 10.0 to 50.0 × 109/l, with a mean of 24.73 ± 15.57 [Table 3].
|Table 3: Platelet count before and after treatment in nonresponder group|
Click here to view
| Discussion|| |
Since its discovery in the 1980s, the relation between H. pylori infection and peptic ulcer and gastric cancer has been established by extensive research. In the past few years, various studies have supported the link between H. pylori and ITP.
In our study, a high frequency of H. pylori infection in patients with ITP 38/54 (70.4%) was found. In concordance with our study, Ando et al. and some Pakistani studies have also reported 83 and 63%, respectively, of H Pylori infection in patients with chronic ITP. However, other studies reported a low frequency of H. pylori infection in France and USA. This might be related to the low prevalence of H. pylori in local population as the socioeconomic status affected the prevalence of H. pylori infection.
In our study, the H. pylori eradication rate was 78.9% (30/38). In agreement with our results, several studies reported eradication rates above 70%,, except one study from Japan (42.9%).
The link between H. pylori and ITP was firstt studied by Gasbarrini et al. by evaluating platelet count improvement in 8 of 11 patients following eradication of H. pylori.
In this study, there were statistically significant increase in platelet count after H. pylori eradication therapy (P< 0.001). In this regard, multiple studies evaluated the effect of eradication therapy on platelet count [25–27]. In concordance with our results, Suzuki et al. in Japan and Rostami et al. showed a significantly increased platelet count in response to H. pylori eradication therapy.
In contrast with our results, the study by Jarque et al. and other multicenter trials in Thailand showed lower platelet response to the eradication therapy.
In our opinion, this variability in the results of studies are related to multiple factors that affect the interaction between host (age, duration of thrombocytopenia, and socioeconomic status) and infectious agent (prevalence and bacterial strains), and in particular, prevalence of infection, which varies in different regions and generations.
| Conclusion|| |
Regarding our results, H. pylori eradication therapy patients with in ITP showed significant improvement of platelet count in most patients. So, it is important to include a screening tests for H. pylori in patients with ITP and initiate treatment in the infected cases. However, Further studies are required to understand the mechanism underlying the response to eradication therapy with longer follow-up duration.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2]
[Table 1], [Table 2], [Table 3]