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МЕДИЦИНСКИЙ ВЕСТНИК СЕВЕРНОГО КАВКАЗА
2014. Т. 9. № 2
MEDICAL NEWS OF NORTH CAUCASUS
2014. Vоl. 9. Iss. 2
© Group of authors, 2014
UDC 616.36-002:616.155.14
DOI - http://dx.doi.org/10.14300/mnnc.2014.09045
ISSN - 2073-8137
ENDOTOXINEMIA IN ANTIVIRAL THERAPY FOR CHRONIC HEPATITIS C AND ITS POTENTIAL PHARMACOLOGIC CORRECTIONS
Geyvandova N. I., Yagoda A. V., Bondarenko E. M.
Stavropol State Medical University, Russian Federation
Chronic hepatitis C (CHC) is a serious medical and social issue. This ailment is associated with a high morbidity rate, possible hepatic cirrhosis and hepatocellular carcinoma [8, 21].
The gold standard in treating chronic hepatitis C is combined antiviral therapy (AVT) with pegylated interferon-alpha (PEG-IFNa) in combination with Ribavirin. At the same time, AVT produces numerous adverse events (AE) that pose considerable difficulties both to the doctor and to the patient. Haematologic disturbances of various intensity manifested as anemia, neutropenia, and thrombo-cytopenia, are among the leading AE coming along with antiviral therapy [10, 14]. Of this side effect, neutropenia has been studied in fewer details, especially when it comes to the clinical relevance of its negative implications. In case of PEG-IFNa treatment the likelihood of developing neutropenia is 17-34 %, which is higher than in case of short-acting IFNa administration. This could be related to a longer effect PEG-IFNa has on the bone marrow [6, 7, 12]. IFNa causes neutropenia due to both direct myelotoxicity and induced autoimmune response [15].
A consequence of neutropenia developing in patients undergoing AVT could be increased serum levels of endotoxin. In 1952, O. Westphal and O. Luderitz succeeded in decoding the biochemical formula of endotoxin and set the terms endotoxin and lipopolyssacharide (LPS) equal [18]. The dominant cellular acceptors for LPS in blood are polymorphonuclear leukocytes, macrophages, and platelets. Human granulocytes are an important endotoxin-binding system involved in complex processes connected to immobilization, transport and removing LPS from the body. Endotoxin binding with granulocytes and macrophages induces, on the one hand, the development of protective me-
Geyvandova Natalya, MD, PhD,
Professor, Department of Hospital Therapy,
Stavropol State Medical University;
tel.: 89624452246; e-mail: [email protected]
Yagoda Alexander, MD, PhD, Professor, Head of Department of Hospital Therapy, Stavropol State Medical University;
tel.: 89064907330; e-mail: [email protected]
Bondarenko Ekaterina, MD, Assistant Lecturer, Department of Hospital Therapy, Stavropol State Medical University; tel.: 89188600180; e-mail: [email protected]
chanisms network, while on the other - production of cytokines and cytokine mediated destruction of various organs and tissues [2, 19]. Therefore, increased levels of endotoxin against the developing neutropenia may suppress significantly the protective capacity of the immune system. However the clinical significance of endotoxinemia elevated indicators in case of AVT has not been detected yet, nor have its potential negative effects.
The purpose of the study is to investigate the serum levels of endotoxin against neutropenia in patients with CHC who undergo antiviral therapy, as well as detecting pharmacologic corrections for endotoxinemia.
Material and Methods. The course of neutropenia through AVT was investigated in 101 patients diagnosed with chronic hepatitis C - 38 females and 63 males. The age varied from 18 to 62 (37.6±0.7 yrs). 62 of the patients (61.4 %) had HCV genotype 1 infection while others revealed non-1 (HCV genotypes 2 and 3). The average level of viremia was 4.9±1.2 log10. None of the patients was diagnosed with any hepatic cirrhosis stage.
In all the patients the combined AVT was administered with IFN-a and Ribavirin. Of them 83 patients were given PEG-IFN-a-2a (Pegasys), while another 18 - short-acting IFN-a. The duration of the therapy depended on the HCV genotype - 24 weeks in case of HCV genotypes 2 and 3, and 48 weeks in case of HCV genotype 1.
The serum levels of endotoxin were detected with chromogenic assay (Hbt LAL Hycult Biotech, Netherlands). The control group included 20 healthy volunteers aged 21-42 yrs.
The results obtained were processed using Microsoft Excel, Biostat, and STATISTICA 6.0. The comparative analysis of the parameters in groups with normal distribution was done using Student's t-test; for groups with non-normal distribution -Mann-Whitney test. Spearman's rank correlation coefficient was employed to reveal the correlation dependence.
Results and Discussion. The total number of leukocytes and the number of neutrophils prior to the antiviral therapy were within the normal ranges. There is data saying that patients with hepatitis C initially have a lower count of neutrophils if compared to the control group [5]. At the same time the level of neutrophils below 2900 cells/mcl at the start of
ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ
Внутренние болезни ^^^^^^^^^^^
ORIGINAL RESEARCH
^^^^ Internal diseases
the therapy was recommended as a predictor of severe neutropenia during treatment [11].
In two weeks of AVT already the number of neutrophils went down reaching the minimum by Week 12, after which the level of neutropenia remained stable until Week 24. However, in patients with HCV genotype 1 the level of neutrophils on Week 48 was lower than on Week 24 (p=0.015). In the course of antiviral therapy, 62 patients developed grade 2 neutropenia (<1.5x109/l) (54 patients who were treated with Pegasys, and 8 - with short-acting IFN-a). Neutrophil count reduction (grade 3 neutropenia)<1.0x109/l through the course of AVT was more often observed in case of using pegylated drug (28.5 %), rather than when employing short-acting IFN-a (8 %; p=0.001). There was no dependence observed of neutropenia development on sex or age. At the same time literature contains evidence of direct relation between age and neutropenia developing through AVT, which was the case, in particular, with patients aged over 60 [13].
Prior to AVT the patients with CHC had blood levels of endotoxin no different from those in healthy people. The endotoxin indices revealed no dependence on the patients' sex or age. Through the course of AVT against developing neutropenia, from Week 8 on, there was an increase in the blood endotoxin levels observed in all the patients (Table 1). Increased endotoxinemia remained there up until the end of the treatment. During that, in the cases with neutropenia (the number of cells <1.5x109/l) the endotoxin levels were significantly higher than in patients with no neutropenia (Table 2). The significance of this difference in groups demonstrating different levels of neutrophils showed up on Week 8 of AVT already and remained further. An increase in the endotoxinemia given the reduction in the absolute number of neutrophils is a perfect illustration of endotoxin-neutralizing capacity found in granulocytic cells. This dependence could be proven through an inverse relationship we detected between the endotoxin levels and the number of neutrophils (Rs= -0.74).
Table 1
Endotoxin levels (U / ml) in blood of patients with CHC undergoing antiviral therapy Me (Q1; Q3)
Table 2
Endotoxin levels (U / ml) in blood of patients with CHC undergoing antiviral therapy depending on neutropenia development Me (Q1; Q3
Prior to treatment 4 weeks 8 weeks 12 weeks 24 weeks 48 weeks
Control (n=20) 0.15 (0.016; 0.68)
CHC (n=101) 3.8 (0.66; 15.9) 5.2 (0.615; 3.212) 9.9 (3.528; 22.7) 16.6 (1.3; 30.1) 15.65 (1.7; 30.4) 10.5 (0.56; 13.3)
Pi 0.00031 0.02 0.004 0.006 0.05 0.006
P2 0.10 0.006 0.003 0.007 0.02
Prior to treatment 4 weeks 8 weeks 12 weeks 24 weeks 48 weeks
Patrients with neutropenia (n=62) 5.5 (0.71; 20.45) 6.764 (1.094; 20.2) 20.7 (6.6; 30) 2.25 (0.615; 27.65) 8 (0.59; 30.1) 11.3 (1.735; 15.75)
Patrients without neutropenia (n=39) 2.5 (0.7; 7.85) 0.665 (0.04; 13.4) 0.8 (0.34; 3.91) 0.92 (0.3; 8.568) 0.56 (0.065; 1.34) 0.9 (0.515; 3.45)
P 0.27 0.08 0.005 0.04 0.01 0.04
P1 - compared to healthy people; P2 - compared to indices before treatment.
There is no single shared opinion on the need to correct neutropenia in patients with CHC who undergo AVT. Oncological practice suggests that patients with neutropenia<500 cells/mcl who undergo polychemotherapy need antibiotics treatment. However, neutropenia developing against AVT in the range of 1000-1500 cells/mcl often remains not associated with bacterial complications and is not believed to need correction [6, 12, 17]. The existing standards in AVT state that in case of neutrophils going down< 750 cells/mcl the PEG-IFN dose should be reduced by 50 %, while in case the index above is< 500 cells/mcl the treatment has to be discontinued. At the same time, it is noted that in 10-20 % of cases neutropenia is the most common cause for reduction of the interferon dose and the frequency of sustained virologic response [6].
An alternative to interferon dose reduction is granulocyte colony-stimulating factor (G-CSF) administration, in particular Filgrastim - a recombinant human G-CSF, synthesized in an E. coli. G-CSF induces the generation and differentiation of neutrophils out of the late progenitor cells, facilitates their phagocytic activity, mobilizes hematopoietic (CD34+) cells, part of them bearing the G-CSF receptor (CD114+). There is data evidencing a defect in the synthesis of endogenous G-CSF in patients with CHC undergoing AVT [1, 5]. There are no dosing regimens available yet in relation to Filgrastim for patients receiving AVT.
28 patients who developed neutropenia (<1x109/l - 1000 cells/mcl) had Filgrastim (Neupo-max) administered at an initial dose of 300 Mg once per week, two days before or two days after the introduction of IFN-a. Filgrastim was introduced on Week 4 through Week 12, depending on the neutropenia development terms. Further on the dosage and the mode of administration were selected on an individual basis - 2 patients got the medicine at 300 Mg twice a week; 10 patients - 300 Mg once a week; 16 - 300 Mg - once every two weeks. As Filgrastim was administered the level of endotoxinemia decreased significantly (p<0.05) while the patients demonstrated a better well-being status (evaluated with Beck Scale). None of those who got G-CSF had any infectious complications. Introduction of Filgrastim allowed maintaining the level of neutrophils at no lower than 1.0-1.5x109/l thus preventing the need to reduce the interferon doses.
МЕДИЦИНСКИЙ ВЕСТНИК СЕВЕРНОГО КАВКАЗА
2014. Т. 9. № 2
MEDICAL NEWS OF NORTH CAUCASUS
2014. Vоl. 9. Iss. 2
Reports on research projects like described above are far from being abundant. In a study run by J. Koi-rala et al. all the patients were treated with Pegasys, and Filgrastim was administered in case of neutropenia below 1000 cells/mcl, on average after 13 (2-40) weeks, 300 ^g once a week, after which the dosage remained the same depending on the level of neutrophils achieved [9]. When needed the dose of Filgrastim had to be taken up to 480 ^g, while in case of complete response it was reduced down to 150 ^g. At the same time no patient developed any neutropenia-associa-ted infectious complications; besides, none of those belonging to the group that was given G-CSF discontinued the antiviral therapy early. The conclusion made here is that the purpose for the therapy should be a level of neutrophils at 1000 cells/mcl and not the baseline level [9]. In another study, in case of neutropenia developing <1000 cells/mcl, the maintenance of the PEG-IFN dose against Filgrastim introduced at 150300 ^g twice a week, resulted in sustained virological response (SVR) more often rather than in cases where the interferon doses were reduced: 30% vs. 21% [20].
Filgrastim, if introduced, will bring up the cost of the therapy, so some authors still remain doubtful when it comes to justifying the need for its administration. However, the level of adherence to AVT and successful outcome is higher in patients with no haematologic disturbances (58% vs. 25%) [11]. A pharmacoeconomic analysis has shown that G-CSF
References
1. Geyvandova N. I., Yagoda A. V., Bondarenko E. M., Ro-gova S. Sh. Granulocyte colonystimulating factor and neutropenia development through antiviral therapy for chronic hepatitis C (CHC). Russ. Journal of Gastroenterol., Hepatol., and Coloproctol. Volume of Fifteenth Russian Conference "Hepatology Today". 2010;1(XX):30.
2. Permyakov N. K., Yakovlev M. Yu., Galankin V. N. Endotoxin and polymorphonuclear leukocyte system. Archives of Pathology. 1989;5(51):3-11.
3. Chapko M. K., Dominitz J. A. Cost-effectiveness of growth factors during hepatitis C anti-viral therapy. Aliment. Pharmacol. Ther. 2006;7(24):1067-1077.
4. Davis G. L., Wong G. B., McHutchinson J. G. et al. Early virologic response to treatment with peginterferon-alfa plus ribavirin in patients with chronic hepatitic C. Hepatology. 2003;38:645-652.
5. Durante-Mangoni E., lardino P., Utili R. et al. Defective synthesis of granulocyte-colony stimulating factor in pegylated interferon-alpha treated chronic hepatitis C patients with declining leukocyte counts. Antivir. Ther. 2006;11(5):637-640.
6. Fried M. W., Shiffman M. L., Reddy R. et al. Peginterfer-on alfa-2a plus ribavirin for chronic hepatitis C virus infection. N. Engl. J. Med. 2002;347:975-982.
7. Fukuda A., Kobayashi H., Teramura K. et al. Effects of interferon-alpha on peripheral neutrophil counts and serum granulocyte colony-stimulating factor levels in chronic hepatitis C patients. Cytokynes, cellular & molecul. Therapy. 2000;3(6):149-154.
8. Ghany M. G., Strader D. B., Thomas D. L., Seeff L. B. Diagnosis, management and treatment of hepatitis C: an update. Hepatology. 2009;49:1335-1374.
9. Koirala J., Gandotra S. D., Rao S. et al. Granulocyte Colony-Stimulating Factor Dosing in Pegylated Interferon Al-pha-lnduced Neutropenia and its Impact on Outcome of Anti-HCVTherapy. J. Viral. Hepat. 2007;14(11):782-787.
10. Kowdley K. V. Hematologic side effects of interferon and ribavirin therapy. J. Clin. Gastroenterol. 2005;39 (suppl. 1):3-8.
taken in the dose of 300 Mg once a week is economically profitable when talking of patients with HCV genotype 1 and neutropenia, yet not patients with HCV genotypes 2 and 3, especially when introduced in the first 12 weeks as this is exactly the time when forced reduction of antiviral drugs doses shall have the highest impact on the frequency of sustained virological response [3, 4]. Mention to be made here that within this particular period we observed a reduction in the number of neutrophils and an increase in neutropenia-associated endotoxinemia.
Conclusion
1. Patients with chronic hepatitis C, when undergoing combined antiviral therapy, have their levels of neutrophils going down starting from Week 2 already, while the minimum counts are observed by Week 12 of the therapy. Neutropenia shall develop more often when pegylated IFNa is used.
2. Neutropenia developing against antiviral treatment offered to patients with CHC is associated with an increase in the serum levels of endotoxin. There has been an inverse relationship found between endotoxinemia and neutrophil counts in the peripheral blood.
3. Introduction of G-CSF allows stabilizing the level of neutrophils, reducing endotoxinemia, improving significantly the patients' well-being as well as their tolerance to the antiviral therapy, also preventing interferon doses reduction.
11. Lebray P., Nalpas B., Vallet-Pichard A. et al. The impact of haematopoietic growth factors on the management and efficacy of antiviral treatment in patients with hepatitis C virus. Antivir. Ther. 2005;10(6):769-776.
12. Manns M. P., McHutchison J. G., Gordon S. C. et al. Pegin-terferon alfa-2b plus ribavirin compared with interferon al-fa-2b plus ribavirin for initial treatment of chronic hepatitis C: a randomized trial. Lancet. 2001 ;358:958-965.
13. Nudo C. G., Wong P., Hilzenrat N., Deschenes M. Elderly patients are at greater risk of cytopenia during antiviral therapy for hepatitis C. Can. J. Gastroenterol. 2006;20(9):589-592.
14. Patel K., Muiz A. J., McHutchison J. G. Diagnosis and treatment of chronic hepatitis C. BMJ. 2006;332:1013-1017.
15. Peck-Radosavljevic M., Wichlas M., Homoncik-Kraml M. et al. Rapid suppression of hematopoiesis by standard or pegylated interferon-alphaet. Gastroenterol. 2002;123:141-151.
16. Sarrazin C., Hezode C., Zeuzem S., Pawlotsky J.-M. Antiviral strategies in hepatitis C virus infection. J. Hepatol. 2012;56(1):88-100.
17. Soza A., Everhart J. E., Ghany M. J. et al. Neutropenia during combination therapy of interferon alfa and ribavirin for chronic hepatitis C. Hepatology. 2002;5(36): 12731279.
18. Westphal O., Luderitz O., Galanos C. et al. The story of endotoxin. Proc. 2-rd Internat. Conf. Adv. Immuno-pharm; 1975. P. 13-37.
19. Wheeler M. D., Stachlewitz R. F., Vamachina S. et al. Glycine-gated chloride channels in neutrophils attenuate calcium influx and superoxide production. Faseb J. 2000;3(14):476-484.
20. Zacharakis G., Koskinas J., Sidiropoulos J. et al. G-CSF in safe and improves adherence and SVR in HCV patients with genotype 1 who develop Peg-IFNa-2b related severe neutropenia. Dig. Dis.Week. 2006;1828.
21. Zeuzem S. Interferon-based therapy for chronic hepatitis C: current and future perspectives. Nat. Clin.Pract. Gastroenterol. Hepatol. 2008;5:610-622.
ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ
Внутренние болезни ^^^^^^^^^^^
ORIGINAL RESEARCH
^^^^ Internal diseases
ENDOTOXINEMIA IN ANTIVIRAL THERAPY
FOR CHRONIC HEPATITIS C AND ITS POTENTIAL
PHARMACOLOGIC CORRECTIONS
GEYVANDOVA N. I., YAGODA A. V.,
BONDARENKO E. M.
Serum levels of endotoxin were detected in 101 patients with CHC. All the patients received combined antiviral therapy (AVT): 83 of them got PEG-IFN-a-2a (Pegasys) and another 18 - short-acting IFNa.
The total number of leukocytes, neutrophils as well as the endotoxin levels in blood prior to AVT was normal. Through the course of AVT, 62 patients developed grade 2 neutropenia (54 patients on Pegasys and 8 receiving short-acting IFNa). Given the developing neutropenia, starting from Week 8 on, there was an increase in the blood endotoxin observed in all the patients, while those with neutropenia had their blood endotoxin higher if compared with those with no neutropenia. There was an inverse relationship found between the endotoxin levels and the number of neutrophils. Filgrastim (Neupo-max) was administered in 28 patients with neutro-penia<1.0x109/l. Against the Filgrastim treatment the endotoxinemia indices got down significantly (p<0.05), while the patients were demonstrating an improved well-being status. Introduction of Filgrastim allowed maintaining the neutrophil level at no lower than 1.0-1.5x109/l thus preventing the need to reduce the doses of interferon.
Key words: chronic hepatitis C, neutrophils, endotoxin, antiviral therapy, granulocyte colony-stimulating factor
ЭНДОТОКСИНЕМИЯ ПРИ ПРОТИВОВИРУСНОЙ ТЕРАПИИ ХРОНИЧЕСКОГО ВИРУСНОГО ГЕПАТИТА С И ВОЗМОЖНОСТИ ЕЕ ФАРМАКОЛОГИЧЕСКОЙ КОРРЕКЦИИ
Н. И. ГЕЙВАНДОВА, А. В. ЯГОДА, Е. М. БОНДАРЕНКО
У 101 больного с ХВГС определяли содержание эндотоксина в сыворотке крови. Всем пациентам проводилась комбинированная противовирусная терапия (ПВТ): 83 больных получали ПегИФН-а2а (Пегасис) и 18 - препараты ИФН-а короткого действия.
Общее количество лейкоцитов, число нейтро-филов и уровни в крови эндотоксина до начала ПВТ были нормальными. В ходе ПВТ нейтропе-ния II степени развилась у 62 больных (54 пациента, получавших Пегасисе, и 8 - ИФН-а короткого действия). На фоне развития нейтропении начиная с 8 недели отмечалось увеличение содержания в крови эндотоксина у всех пациентов. При этом у больных с нейтропенией уровень эндотоксина был выше, чем у пациентов без ней-тропении. Была выявлена обратная связь между уровнем эндотоксина и числом нейтрофилов. Филграстим (Нейпомакс) был применен у 28 пациентов с нейтропенией <1,0х109/л. На фоне назначения филграстима достоверно уменьшался уровень эндотоксинемии (р<0,05) и улучшалось самочувствие пациентов. Введение филграсти-ма позволило сохранять уровень нейтрофилов не ниже 1,0-1,5х109/л и тем самым предотвращать необходимость снижения дозы интерферонов.
Ключевые слова: хронический вирусный гепатит С, нейтрофилы, эндотоксин, противовирусная терапия, гранулоцитарный колониести-мулирующий фактор
© Group of authors, 2014 UDC 616-053.5:616.1
DOI - http://dx.doi.org/10.14300/mnnc.2014.09046 ISSN - 2073-8137
FEASIBILITY OF ALLOCATION OF PERSONS WITH SIGNS PREHYPERTENSION IN PREVENTIVE MEDICAL INVESTIGATION OF STUDENT YOUTH
Evsevyeva M. E., Mistchenko E. A., Rostovtseva M. V., Sergeeva O. V., Galkova I. Yu., Smirnova T. A.
Stavropol State Medical University, Russian Federation
Evsevyeva Maria, MD, PhD, Professor, Honored Doctor
of the Russian Federation, Head of the Student Health Center, Head
of Department of Internal Illnesses, Stavropol
State Medical University;
tel.: 8(928)3154687; e-mail: [email protected]
Mistchenko Elena, PhD, Assistant of Department of Internal Illnesses, Stavropol State Medical University; tel.: 8(926)3167244; e-mail:[email protected]
Rostovtseva Maria, Postgraduate of Department of Internal Illnesses, Stavropol State Medical University; tel.: 8(926)1919513; e-mail: [email protected]
Sergeeva Oksana, PhD, Docent of Department of Internal
Illnesses, Stavropol State Medical University;
tel.: 8(918)7412289; e-mail: [email protected]
Galkova Ilona, Postgraduate of Department of Internal Illnesses,
Stavropol State Medical University;
tel.: 8(928)2933574; e-mail:[email protected]
Arterial hypertension (AH) remains one of the most acute problems of modern health care because of the high incidence and significant contribution to the overall structure of mortality and disability population [1, 2, 3]. However, its detection in the early stages in young adults remains unsatisfactory [4, 5]. In this regard, adequate assessment of high normal blood pressure (HNAD), which relates in accordance with the classification of the Joint National Committee on Detection, Evaluation and Treatment of hypertension USA (ONC 7) prehypertension should call special attention to professionals. Current data
