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Орипнальш досл^ження Original Researches < ■ i ГАСТРОЕНТЕРОЛОПЯ GASTROENTEROLOGY
Патолопя кишечника / Bowel Pathology
UDC 616.34-002:616.98:578.825.12 DOI: 10.22141/2308-2097.53.4.2019.187587
G.H. Babayeva
Azerbaijan State Advanced Training Institute for Doctors named after A. Aliev, Baku, Azerbaijan
Cytomegalovirus and mixed viral infections in patients with inflammatory bowel disease
For citation: Gastroenterologia. 2019;53(4):258-265. doi: 10.22141/2308-2097.53.3.2019.187587
Abstract. Background. The issue of the prevalence of opportunistic infections in persons with inflammatory bowel disease (IBD) remains relevant. Among opportunistic infections, in particular, we would like to note Her-pesviridae family (herpes simplex virus type 1 and 2), human herpesvirus type 3 (varicella zoster virus), human herpesvirus type 4 (Epstein-Barr virus), cytomegalovirus (CMV), or human herpesvirus type 5, human herpesvirus type 6 and parvovirus B19. Clinically marked herpes and parvovirus infections are frequent causes of systemic inflammation of the gastrointestinal tract. This is a serious problem, especially for persons with long-term immunosuppression, who have IBD, and special attention in this aspect is paid to cytomegalovirus infection. Clinical activity of CMV-associated IBD, its duration and severity, as well as the use of steroids and anti-TNF-a agents were identified as risk factors for adverse outcomes. It is important not only to detect the presence of viruses in the patient's body, but also to clarify their etiological role in the development of the disease. According to the current European Crohn's and Colitis Organisation (ECCO) protocols, all patients with IBD are recommended to be screened in hormone resistance, loss of effect from maintenance therapy and severe attacks of the disease. The addition of active CMV infection to IBD may likely be one of the causes of resistance to hormone and immunosuppressive therapy, as well as biological drugs, but this issue requires further researches. The purpose was to evaluate the frequency of detecting isolated cytomegalovirus infection and mixed (herpes and parvovirus B19) viral infections in patients with IBD and their influence on the disease activity. Materials and methods. One hundred and eighty-nine patients (98 women and 91 men) with IBD (102 with ulcerative colitis (UC) and 87 with Crohn's disease (CD)) were examined. The age of patients was from 16 to 63 years (mean age (41.4 ± 4.8) years). In addition to standard clinical endoscopic examinations according to ECCO guidelines, disease activity was assessed by indicators of highly sensitive C-reactive protein, homocysteine, vitamin D in blood serum, albumin in urine, calprotectin and lac-toferrin in feces. All patients underwent serological blood test by enzyme-linked immunosorbent assay for specific antibodies to herpesviruses and IgG/IgM antibodies to parvovirus B19, determination of DNA of herpes simplex viruses types 1, 2, 6, Epstein-Barr virus, cytomegalovirus, herpes zoster by a polymerase chain reaction in blood and tissues. All patients underwent determination of blood cytokines (tumor necrosis factor a, interleukins 1p, -2, -4, -6, -8, -10, -18). Results. Viral (herpes and parvovirus B19) infections in patients with IBD occurred in 81 cases (42.8 %): in 35 (40.2 %) of 87 patients with CD and in 46 (45.0 %) of 102 — with UC. Among patients with cytomegalovirus infection alone, 21 (11.1 % of the total number and 25.9 % of infected persons) suffered from UC and 16 (8.5 % of the total number and 19.7 % of infected persons) — from CD. In 26 (13.8 % of the total number and 32.1 % of infected persons) cases, mixed viral infections were detected — in 13 patients with CD and 13 with UC (6.9 % of the total number and 16.0 % of infected persons). In patients with IBD, the frequency of detecting isolated cytomegalovirus infection is 19.5 % of the total number and 45.6 % of infected persons; mixed viral infection was found in 13.8 % of the total number and 32.1 % of infected patients. The clinical endoscopic picture (resistance to basic therapy, the mismatch between the endoscopic picture and the pathomorphological conclusion), as well as laboratory data, indicate a more severe course of diseases in the presence of cytomegalovirus infection. Conclusion. The data obtained allow us to recommend, in addition to ECCO protocols, the determination of the presence of opportunistic (herpes and parvovirus B19) infections in patients with newly diagnosed IBD before starting basic therapy, without waiting for the development of disease forms refractory to therapy.
Keywords: cytomegalovirus infection; herpes and parvovirus B19; mixed viral infections; inflammatory bowel disease; ulcerative colitis; Crohn's disease
© «Гастроентеролопя» / «Гастроэнтерология» / «Gastroenterology» («Gastroenterologia»), 2019 © Видавець Заславський О.Ю. / Издатель Заславский А.Ю. / Publisher Zaslavsky O.Yu., 2019
For correspondence: Gulustan Babayeva-Sadiqova, PhD, MD, Associate Professor at the Department of Therapy, Azerbaijan State Advanced Training Institute for Doctors named after A. Aliev, Baku, Azerbaijan; e-mail: [email protected]
Для корреспонденции: Гюлюстан Бабаева-Садыхова, доктор медицинских наук, доцент кафедры терапии, Азербайджанский государственный институт усовершенствования врачей имени А. Алиева, г. Баку, Азербайджан; e-mail: [email protected]
Introduction
The prevalence of opportunistic infections in individuals with inflammatory bowel disease (IBD) remains relevant. Clinically expressed herpes and parvovirus infections are a common causes of systemic inflammation of the gastrointestinal tract. This is a serious problem, especially for people with long-term immunosuppression. Particular attention among opportunistic infections is paid to cytomegalovirus infection (CMV). The clinical activity of CMV-associated IBD, the duration and severity of the disease, and the use of steroids and anti-TNF-a agents have been identified as risk factors for adverse outcomes. In the diagnosis of CMV, it is important not only to detect the presence of the virus in the patient's body, but also to clarify its etiological role in the development of the disease. The most significant here are virological and serological methods. Currently, screening for CMV is recommended for all patients with IBD in hormone resistance, loss of effect from ongoing maintenance therapy and in severe attacks of the disease. The addition of active CMV infection to IBD may likely be one of the causes of resistance to hormone and immunosuppressive therapy, as well as biological drugs, however, this issue requires further researches.
Why is it so important to determine the presence of cytomegalovirus infection in patients with IBD?
Human CMV (Cytomegalovirus hominis) is an anthro-ponotic viral disease, belongs to the family Herpesviridae (has the specific name human herpesvirus (HHV) type 5). CMV is characterized by polyhistiotropy, which might lead to a variety of clinical forms of the disease involving various organs and systems of the body in the pathological process. This circumstance gives the problem of CMV an interdisciplinary nature [1]. Three virus strains were registered: AD 169, Davis, and Kerr. The viral envelope consists of proteins, which also participate in the formation of the immune response: glycoproteins H and B [1, 2].
In acute CMV, the virus infects epithelial cells, including enterocytes and colonocytes, with the formation of giant cells with intranuclear inclusions of cytomegaloviruses in the tissues and organs. Cytomegaloviruses, which are lym-phohistiocytic infiltrates, cause productive vasculitis with damage to all layers of the vessel wall and the outcome in sclerosis. This vascular lesion serves as the basis for thrombosis that leads to ischemic damage to organs and tissues, which is the basis of pathogenesis [1, 3].
CMV can suppress cellular immunity due to virus replication in the cells of the immune system, as well as the ability to slow replication, relatively low pathogenicity and lifelong persistence in humans with periodic reactivation [1, 3, 4]. There may be periods of reactivation of the infection with the secretion of the virus from the nasopharynx and in the urogenital tract.
Infection is often asymptomatic. In 5 % of patients, it can occur in the form of mononucleosis-like syndrome with high fever, myalgia, arthralgia, polylymphadenopathy, hepa-tosplenomegaly. The lesion is often generalized [3]. A wide range of organ lesions, including gastrointestinal tract organs, is associated with CMV. The disease can cause ulcerative defects of the digestive tract: ulcerative necrotic lesions of the esophagus, colon, less often — of the small intestine and stomach [1, 5, 6]. In repeated infection or reactivation of CMV against the background of immunosuppression, active replication of the virus begins, a manifestation of the disease is possible with a tendency to the generalization of the process [5, 6].
Typical clinical signs of CMV esophagitis are fever, difficulty swallowing, severe chest pain during passage of the food lump, and the absence of the effect of antifungal therapy. The endoscopic picture is characterized by the presence of shallow rounded ulcers or erosion in the distal esophagus (Fig. 1).
CMV has a tropism for actively proliferating tissues of the gastrointestinal tract, therefore, patients with IBD have an increased risk of CMV colitis [1—7]. The clinical picture of CMV colitis or enterocolitis includes severe abdominal pain, diarrhea, weakness, severe weight loss; blood in the stool is also possible.
For the endoscopic picture, the detection of erosion on the mucous membrane of the colon and, less commonly, the small intestine is pathognomonic; the presence of typical endoscopic features, including longitudinal ulcers, mucosal lesions with cobblestone appearance, discrete lesions, mu-cosal defects, perforated ulcer, creates difficulties in endo-scopic verification of the diagnosis of ulcerative colitis (UC) and Crohn's disease (CD) (Fig. 2).
IBD is characterized by relapses and periods of remission. However, clinical signs such as abdominal pain, diarrhea, and rectal bleeding are not specific to ulcerative colitis and Crohn's disease. Therefore, the differential diagnosis
W
Figure 1 — CMV-associated lesions of the esophagus in a patient with Crohn's disease (unpublished materials from the author's archive)
should include a wide range of inflammatory or infectious diseases that mimic IBD, and can also complicate the course of the disease. Superinfection of CMV or Clostridium difficile can aggravate intestinal inflammation, especially in immunocompromised individuals. CMV in patients with ulcerative colitis is associated with a severe course of the disease and hormonal dependence, it is necessary to accurately determine the cause, which aggravates the course of IBD [7].
Y. Li et al. conducted a 5-year retrospective study in IBD patients, the result of which was a conclusion that in mixed infection (CMV and C.difficile), worse outcomes are observed in patients with UC and CD [8]. Cytomegalovirus disease in patients with IBD is often a result of viral reactivation against the background of ongoing immunosuppression [9—13]. C. Rowan et al. (2018) recommend diagnostic tests to be carried out for the detection of CMV markers in all patients with IBD occurring with febrile condition [9]. Research by T.M. Nowacki et al. also confirms the pathogenic significance of CMV in ulcerative colitis, where the relationship of exacerbation of ulcerative colitis with reactivation of CMV was proved, especially in patients with weakened immunity [10, 11].
CMV etiology of the disease is common in patients with severe IBD. The clinical activity of CMV-associated IBD, the duration and severity of the disease, especially when using steroids and anti-TNF-a agents, were identified as risk factors for severe outcomes (p < 0.05 each) [10—14].
The multifaceted nature of CMV does not allow one to diagnose an infection clinically; therefore, the decisive role belongs to specific laboratory diagnosis, which is based on various methods for detecting the causative agent: identification of viral DNA, its antigens, specific antibodies, morphological picture [1, 14, 15]. In the diagnosis of CMV, it is important to establish not only the presence of the virus in the patient's body, but also its etiological role in the development of this disease. The most significant in our time are virological (isolation of CMV, detection of its antigens) and serological methods (determination of specific IgM and IgG antibodies by enzyme-linked immunosorbent as-
say (ELISA), avidity of anti-CMV IgG). IgG avidity index of anti-CMV above 50—60 % indicates the presence of highly avid antibodies in the serum — markers of a past infection or persistent infection and elimination of the primary CMV infection in the last 3—4 months. Highly avid IgG antibodies persist for life. CMV reactivation is judged by the appearance of anti-CMV IgM. It is very important to take into account that the level of specific antibodies and their titer are not indicators determining the degree of infection activity, since they depend on individual immune reactivity.
In the last decade, the leading place in the diagnosis of CMV belongs to the molecular genetic method for determining CMV DNA — polymerase chain reaction (PCR). PCR is used to detect and quantify CMV DNA in various biological fluids and tissues. Thus, according to the findings of Y Tsuchido et al. (2018), the use of PCR for biopsies showed good diagnostic indicators when detecting CMV in patients [11]. The combination of virological and serologi-cal methods is optimal for the diagnosis of CMV and determines the degree of its activity. The etiological role of the virus in CMV-associated somatic disease is determined based on the correlation of the results of laboratory and clinical research methods [11].
IBD is treated with drugs that suppress the immune system, which increases the risk of developing infectious complications [12, 16]. Against the background of such therapy, reactivation of latent viral infections, including CMV, often occurs. It is believed that the association with CMV may be one of the causes of the severe course of IBD and hormone resistance, as well as resistance to other ongoing therapy, including anti-TNF-a drugs [13, 16, 17]. For patients with IBD and clinically expressed CMV infection, specific antiviral therapy is extremely important. Before specific treatment begins, immunosuppressive therapy should be discontinued. Control using ELISA or PCR is carried out at the end of the main course of therapy. Immunosuppressive therapy can be resumed after receiving negative results of tissue PCR [1, 12, 16].
Figure 2 — CMV-associated colon lesions in a patient with IBD: а) Crohn's disease; b) ulcerative colitis (unpublished materials from the author's archive)
Nucleotide analogues (ganciclovir, valganciclovir) are used as antiviral chemotherapy drugs for the treatment of CMV infection. They are effective inhibitors of viral DNA replication [1, 5, 13, 16, 17]. The antiviral effect of ganci-clovir is associated with the formation of ganciclovir tri-phosphate and competitive inhibition of DNA polymerase, as well as direct incorporation into viral DNA, which inhibits virus replication. The drug is stored in the cytoplasm of virus-infected cells for several days [1, 13, 14, 17, 18].
The standard course of therapy is the use of ganciclovir at a dose of 5 mg/kg twice a day or valganciclovir 900 mg twice a day for 14—21 days until the symptoms of the disease disappear and DNA virus is eliminated from the patient's blood. In order to prevent the recurrence of the disease in patients in a state of immunosuppression, a maintenance course of valganciclovir 900 mg twice a day for a month is carried out [17—19]. The use of interferons and interferon inducers (for example, cycloferon, viferon) in combination with antiviral drugs also leads to positive results [4, 13, 14, 17, 18].
The purpose: to assess the frequency of detecting isolated cytomegalovirus infection and mixed viral (herpes and par-vovirus B19) infection in patients with IBD and its effect on disease activity.
Materials and methods
One hundred and eighty-nine patients (98 women and 91 men) with IBD (102 with ulcerative colitis and 87 with Crohn's disease) were examined. The age of patients was from 16 to 63 (mean of (41.4 ± 4.8)) years. In addition to standard clinical endoscopic examinations according to European Crohn's and Colitis Organisation (ECCO) guidelines, disease activity was assessed by indicators of highly sensitive C-reactive protein (CRP), homocysteine, vitamin D in blood serum, albumin in urine, calprotectin and lac-toferrin in feces. All patients underwent a serological blood test by ELISA for specific antibodies to herpesviruses and
IgG/IgM antibodies to parvovirus B19, the determination of DNA to herpes simplex virus types 1, 2, 6, Epstein-Barr virus (EBV), cytomegalovirus, herpes zoster by PCR in blood and tissues. All patients underwent determination of blood cytokines (tumor necrosis factor-a (TNF-a), inter-leukins (IL) 1ß, -2, -4, -6, -8, -10, -18).
Chronic active EBV infection was diagnosed based on the detection of antinuclear antibodies to EBV (EBV-NA1 IgG) in excess of the permissible indicators by 4 or more times, as well as the presence of EBV-VCA IgM, EBV-EA IgG and determination of EBV DNA in blood cells and/or biopsy samples of the intestinal mucosa in a concentration from 1,000 copies/ml.
Chronic active CMV was established based on the detection of specific IgG antibodies in a titer of at least 1 : 3,200 (i.e., 4 times higher than the permissible norm), IgM and detection of CMV DNA in blood cells and/or biopsy samples of the intestinal mucosa in a concentration from 1,000 copies/ml.
Chronic active infection of herpes simplex virus (HSV) types 1 and 2 was diagnosed based on the detection of specific IgG antibodies in a titer of at least 1 : 3,200 (i.e., 4 times exceeded the permissible norm), IgM antibodies and detection of HSV 1—2 DNA in blood cells and/or biopsy specimens of the intestinal mucosa in a concentration of 1,000 copies/ml.
Active human herpesvirus type 6 infection was established based on the detection of DNA of this virus in blood cells and/or biopsy specimens of the intestinal mucosa in a concentration of 1,000 copies/ml.
Results and discussion
The results are presented in Fig. 3, 4 and Table 1.
As can be seen from Table 1, viral infections in patients with IBD occurred in 81 cases (42.8 %): in 35 (40.2 %) of 87 patients with CD and in 46 (45.0 %) of 102 — with UC (Fig. 3).
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Figure 3 — Frequency of detecting viral infections in inflammatory bowel diseases (in absolute numbers)
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Figure 4 — Frequency of detecting viral infections in inflammatory bowel disease (depending on the methods used)
Table 1 — Endoscopic and laboratory indicators of inflammatory activity in patients with IBD, taking into account the presence of viral infections
Indicators Ulcerative colitis Crohn's disease
Average value Group 1 (n = 56) Group 2 (n = 25) Group 3 (n = 21) Average value Group 1 (n = 52) Group 2 (n = 19) Group 3 (n = 16)
Hs-CRP (N < 1 mg/L) 11.B 9.3 13.4* 16.B* 11.6 10.1 12.B* 1Б.1*
Platelets (N 150-400 • 109/mm3) 349.7 32B.7 3Б6.4* 39B.1* 3ББ.3 347.4 3Б2.7* 3B4.3*
Homocysteine (N < 12 |imol/L) 16.Б 16.6 1S.B* 17.1* 1Б.2 14.B 1Б.3* 16.B*
Vitamin D (N 30-100 ng/mL) 19.B 19.B 22.1* 17.3* 17.1 16.4 1B.2* 1B.3*
Calprotectin (N < 50 |ig/g) 361.B 342.6 3BB.7* 3B1.1* 369.4 358.4 396.4* 373.2*
Albumin in urine (N < 2 mg/L) 23.1 23.4 22.B* 23.0* 23.6 24.1 22.Б* 23.7*
Lactoferrin (N < 7.5 |ig/g) 127.3 124.1 139.2* 121.7* 124.7 1^.B 141.4* 134.2*
TNF-a (N 4.6-12.4 pg/ml) 12.B 12.6 13.1* 12.9* 12.B 12.B 12.9* 12.6*
IL-1 ß (N < 11 pg/ml) 10.4 10.2 10.B* 10.6* 10.4 10.4 10.3* 10.Б*
IL-2 (N < 10 pg/ml) 2.Б 2.4 2.6* 2.Б* 2.2 2.1 2.3* 2.3*
IL-4 (N < 4 pg/ml) 2.1 2.2 2.0* 2.1* 2.0 1.9 2.2* 2.3*
IL-6 (N < 10 pg/ml) B.9 9.1 B.9* B.6* 7.9 9.9 9.2* B.6*
IL-8 (N < 10 pg/ml) 24.4 24.6 23.B* 2Б.0* 24.2 23.9 24.1* 2Б.6*
IL-10 (N < 20 pg/ml) 22.1 22.1 22.4* 21.B* 22.0 21.B 22.3* 22.6*
IL-18 (N < 261 pg/ml) 27B.B 276.3 2B3.1* 2B1.2* 2B1.0 2B1.9 2B0.1* 279.6*
Notes: group 1 — patients with IBD without infections: group 2 — persons with infections, including mixed CMV infection; group 3 — individuals with isolated CMV; N — norm; * — p < 0.05.
At the same time, in 55 patients (29.1 % of the total number and 67.9 % of infected persons), isolated viral infection was detected: Epstein-Barr virus — in 2 (1.1 % of the total number and 2.4 % of infected persons), cytomegalovirus — in 37 (19.5 % of the total number and 45.6 % of infected persons), and parvovirus — in 16 (8.4 % of the total number and 19.7 % of infected persons). Among patients with isolated cytomegalovirus infection, 21 (11.1 % of the total number and 25.9 % of infected persons) suffered from UC and 16 (8.5 % of the total number and 19.7 % of infected persons) — from CD.
In 26 cases (13.8 % of the total number and 32.1 % of infected persons), mixed viral infections were detected — in 13 patients with CD and 13 with UC (6.9 % of the total number and 16.0 % of infected persons).
The following combinations of mixed viral infections were noted: CMV + HSV 1-2 — in 5 cases (2 — UC and 3 — CD), CMV + EBV — in 11 (5 — UC and 6 — CD), EBV + HHV-6 — in 2 (UC), EBV + parvovirus B19 — in 5 (3 — UC and 2 — CD), EBV + parvovirus B19 + CMV — in 3 (1 — UC and 2 — CD).
As a result, cytomegalovirus infection was detected in 56 patients (29.6 % of the total number and 69.1 % of infected persons): in 37 cases — alone (19.5 % of the total number and 45.6 % of infected persons) and in 19 — in the form of mixed viral infections (10 % of the total number and 23.4 % of infected persons).
Clinical endoscopic and laboratory indicators of inflammatory activity in IBD were significantly higher in patients with viral infections (p < 0.05). Thus, the values of CRP, platelets, lactoferrin and calprotectin were significantly higher in patients with concomitant viral damage (p < 0.05). This pattern was observed both in UC and CD. Moreover, the markers of inflammation were greatest in the presence of cytomegalovirus infection, although this difference did not reach the threshold of statistical significance.
ECCO recommends screening for CMV infection in all patients with IBD in hormone resistance, loss of effect from ongoing maintenance therapy and severe attacks of the disease [16]. Based on clinical studies in China and other countries, the Gastroenterological Society of the Chinese Medical Association published a consensus opinion in 2018 that patients with IBD are at high risk of opportunistic infections [19].
The following provisions were formulated:
1. Screening for CMV is recommended for patients with acute severe ulcerative colitis with resistance to glucocorti-coids.
2. The detection of specific anti-CMV IgM antibodies and/or pp65 CMV (> 1 CMV-positive cells in every 150,000 leukocytes) and/or CMV DNA in the blood of real-time quantitative PCR (qPCR) suggests an active form of CMV
3. The gold standard for the diagnosis of CMV colitis is a positive pathomorphological study on H- and E-staining in combination with positive immunohistochemistry and/or positive qPCR for CMV DNA in the tissues of the colon mucosa.
4. Antiviral therapy is recommended for CMV DNA > 1,200 copies/ml blood (qPCR).
5. Typical endoscopic features, including mucosal defect, perforated ulcer, longitudinal ulcers, such as cobblestone appearance, and discrete lesions, suggest CMV colitis. This requires a routine biopsy with differential diagnosis.
6. Antiviral therapy should be started timely in patients with severe steroid-resistant IBD associated with CMV. The decision to stop taking or reduce the dose of immunosup-pressants should be considered based on the assessment of all the pros and cons.
7. A three- to six-week course of antiviral therapy is recommended for patients with IBD associated with CMV.
Conclusions
Viral infections in patients with IBD occurred in 81 cases (42.8 %): in 35 (40.2 %) of 87 patients with CD and in 46 (45.0 %) of 102 with UC.
Among patients with isolated cytomegalovirus infection, 21 (11.1 % of the total number and 25.9 % of infected persons) suffered from UC and 16 (8.5 % of the total number and 19.7 % of infected persons) — from CD. In 26 (13.8 % of the total number and 32.1 % of infected persons) cases, mixed viral infections were detected — in 13 patients with CD and 13 with UC (6.9 % of the total number and 16.0 % of infected persons). In patients with IBD, the frequency of detecting isolated cytomegalovirus infection is 19.5 % of the total number and 45.6 % of infected persons; mixed viral infection was detected in 13.8 % of the total number and 32.1 % of the number of infected patients.
The clinical endoscopic picture (resistance to basic therapy, the mismatch between the endoscopic picture and the pathomorphological conclusion), as well as laboratory data indicate a more severe course of diseases in the presence of cytomegalovirus infection.
The data obtained allow us to recommend, in addition to ECCO protocols, the determination of the presence of opportunistic (herpes and parvovirus B19) infections in patients with newly diagnosed IBD before starting basic therapy, without waiting for the development of disease forms refractory to therapy.
Conflicts of interests. Author declares the absence of any conflicts of interests and their own financial interest that might be construed to influence the results or interpretation of their manuscript.
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Бабаева Г.Г.
Азербайджанський державний Нститут удосконалення AkapiB iMeHi A. AAieBa, м. Баку, Азербайджан
U^OMer^oBipycHa i змшан BipycHi Ыфекцп в паценлв i3 запальними захворюваннями кишечника
Резюме. Актуальшсть. Питання поширеносп опортушстичних шфекцш в ошб 1з запальними захворюваннями кишечника (ЗЗК) залишаеться актуальним. Особливу ува-гу серед опортушстичних шфекцш придшяеться цитоме-галовiруснiй (ЦМВ) шфекци. Клшчна актившсть ЦМВ-асоцшованого ЗЗК, його тривалють i стушнь тяжкосп, а також використання стерощв i анти-ФНП-а-агенпв були щентифшоваш як фактори ризику несприятливих наслщюв. У дiагностицi ЦМВ важливо не просто виявити наявшсть вiрусу в органiзмi пащента, але й уточнити його етюлопч-ну роль у розвитку захворювання. У цей час рекомендуеться проведення скриншгу на ЦМВ у всгх пащенйв 1з ЗЗК при гормональнш резистентности втрати ефекту вщ пщтриму-ючо! терапй та при тяжких ешзодах захворювання. Мета до^дження: ощнка частоти виявлення iзольованоl цитоме-галовiрусноl шфекци i змтаних (герпес та парвовiрус В19) вiрусних шфекцш у пащенпв 1з ЗЗК та 1х вплив на актившсть захворювання. Матерiалu та методи. Обстежено 189 ошб 1з ЗЗК, 102 з виразковим колиом i 87 з хворобою Крона, серед них 98 жшок та 91 чоловш. Вгк пащенйв становив вщ 16 до 63 роив, у середньому (41,4 ± 4,8) року. Крiм стандартного клшко-ендоскотчного обстеження вщповщно до поло-жень бвропейсько! оргашзаци з вивчення хвороби Крона i виразкового колиу (ЕССО), актившсть захворювання ощ-нювалася за показниками високочутливого С-реактивного
бшка, гомоцистешу, витамшу В у сироватщ кров^ альбумшу в сеч^ кальпротектину i лактоферину в калi. Уйм пащентам проведено серолопчне дослщження кровi методом iмуно-ферментного аналiзу на специфiчнi антитша до герпесвiру-ив i ]^0-/]^М-антит1ла до парвовiрусу В19, а також визна-чення ДНК вiрусiв простого герпесу 1, 2, 6-го тишв, вiрусу Епштейна — Барр, цитомегаловiрусу, герпесу зостер методом полiмеразноl ланцюгово! реакци. В ус1х пащенпв також ви-значали рiвнi цитоюшв у кровi (фактор некрозу пухлини а, iнтерлейкiни 1Р, -2, -4, -6, -8, -10, -18). Результати. У пащ-енпв 1з ЗЗК частота виявлення iзольованоl цитомегаловiрус-но! шфекци становить, за нашими даними, 19,5 %, а з ураху-ванням змтаних уражень — 29,6 %. Клшко-ендоскошчна картина (рефрактернiсть до базисно1 терапи, невiIдповiIднiсть м1ж ендоскопчною картиною i патоморфологiчним висно-вком), а також даш лабораторних дослщжень вказують на б1льш тяжкий переби захворювання за наявностi цитомега-ловiрусноl шфекци. Висновки. Отриманi данi дозволяють нам рекомендувати на додаток до протокол1в ЕССО визначення наявностi опортушстичних шфекцш у пащенпв 1з вперше виявленим ЗЗК до початку базисно1 терапи, не чекаючи на розвиток рефрактерних до лшування форм захворювання. Ключовi слова: цитомегаловiрусна iнфекдiя; герпес i парвов1рус В19; змiшанi вiруснi шфекци; запальнi захворювання кишечника; виразковий колит; хвороба Крона
Бабаева Г.Г.
Азербайджанский государственный институт усовершенствования врачей имени А. Алиева, г. Баку, Азербайджан
Цитомегаловирусная и смешанные вирусные инфекции у пациентов с воспалительными заболеваниями кишечника
Резюме. Актуальность. Вопрос распространенности оппортунистических инфекций у лиц с воспалительными заболеваниями кишечника (ВЗК) остается актуальным. Особое внимание среди оппортунистических инфекций уделяется цито-мегаловирусной (ЦМВ) инфекции. Клиническая активность ЦМВ-ассоциированного ВЗК, его длительность и степень тяжести, а также использование стероидов и анти-ФНО-а-агентов были идентифицированы как факторы риска неблагоприятных исходов. В диагностике ЦМВ важно не просто выявить наличие вируса в организме пациента, но и уточнить его этиологическую роль в развитии заболевания. В настоящее время рекомендуется проведение скрининга на ЦМВ у всех пациентов с ВЗК при гормональной резистентности, потере эффекта от поддерживающей терапии и при тяжелых эпизодах заболевания. Цель исследования: оценка частоты выявления изолированной цитомегаловирусной инфекции и смешанных (герпес и парвовирус В19) вирусных инфекций у пациентов с ВЗК и их влияние на активность заболевания. Материалы и методы. Обследовано 189 пациентов с ВЗК, 102 с язвенным колитом и 87 с болезнью Крона, среди них 98 женщин и 91 мужчина. Возраст пациентов составлял от 16 до 63 лет, в среднем (41,4 ± 4,8) года. Кроме стандартного клинико-эндоскопического обследования в соответствии с положениями Европейской организации по изучению болезни Крона и язвенного колита (ЕССО), активность заболевания оценивалась по показателям высокочувствительного С-реактивного белка, гомоцистеина, витамина В в сыворотке
крови, альбумина в моче, кальпротектина и лактоферрина в кале. Всем пациентам проведено серологическое исследование крови методом иммуноферментного анализа на специфические антитела к герпесвирусам и ]^0-/]^М-антитела к парвовирусу В19, а также определение ДНК вирусов простого герпеса 1, 2, 6-го типов, вируса Эпштейна — Барр, цитоме-галовируса, герпеса зостер методом полимеразной цепной реакции. У всех пациентов также определяли уровни цитоки-нов в крови (фактор некроза опухоли а, интерлейкины 1Р, -2, -4, -6, -8, -10, -18). Результаты. У пациентов с ВЗК частота выявления изолированной цитомегаловирусной инфекции составляет, по нашим данным, 19,5 %, а с учетом смешанных поражений — 29,6 %. Клинико-эндоскопическая картина (рефрактерность к базисной терапии, несоответствие между эндоскопической картиной и патоморфологическим заключением), а также данные лабораторных исследований указывают на более тяжелое течение заболевания при наличии ци-томегаловирусной инфекции. Выводы. Полученные данные позволяют нам рекомендовать в дополнение к протоколам ЕССО определение наличия оппортунистических инфекций у пациентов с впервые выявленным ВЗК до начала базисной терапии, не дожидаясь развития рефрактерных к лечению форм заболевания.
Ключевые слова: цитомегаловирусная инфекция; герпес и парвовирус В19; смешанные вирусные инфекции; воспалительные заболевания кишечника; язвенный колит; болезнь Крона
