scholarly journals Planimetric correlations between Peyer’s patches and the area of small intestine of white rats

2018 ◽  
Vol 24 (2) ◽  
pp. 66-72 ◽  
Author(s):  
V.H. Hryn
Keyword(s):  
Small Intestine ◽  
White Male ◽  
Peyer's Patches ◽  
Male Rats ◽  
Control Group ◽  
Peyer’S Patches ◽  
White Rats ◽  
Longitudinal Length ◽  
Significant Difference ◽  
Lymphoid Nodules

The largest concentration of the local immune system in the form of the nodular associations of the lymphoid tissue with the epithelium of the mucous membranes (tonsils, single lymphoid nodules and their aggregations, named Peyer’s patches) is located in the gut. The paper is aimed at the study of the quantitative and planimetric correlations between the Peyer’s patches and the area of the small intestine of white rats based on the visual assessment and comparative analysis of some metric values. The study was conducted on 60 white male rats, which were assigned into 2 groups of 30 animals: after the morning feeding (controls) and after a daily fasting. After the removal made in advance, the gut-associated complexes have been studied from the stomach to the cecum. The resulting experimental data have been processed on a personal computer using the EXCEL 2010 (Microsoft Excel Corp., USA) software. No significant difference in the diameter and length of the small intestine of white rats of the first and second groups was found. The total area of the small intestine wall in the control group ranged from 8666 mm2 to 20724 mm2, and from 8496 mm2 to 20573 mm2 in group II (after a daily fasting), ranking equally. Thickness parameters of the small intestine in two groups of animals were almost similar in its unchanged, within the limits of individual variability, longitudinal length. To conduct an accurate quantitative and planimetric analysis of the aggregated lymphoid nodules of the white rat’s small intestine, it was advisable to distinguish 3 groups, namely: small-, medium- and large-sized. Thus, their total number varies from 12 to 28 units. Among them 8 to 17 units (on the average of 12.60±0.400) were small-sized, 2 to 11 (5.800±0.500) were medium-sized, and the large ones were not always found. For example, in the studied samples, they were absent in 6 animals, whereas 1 to 5 units were presented in the rest of animals. The area of single small Peyer’s patches ranged from 1.570 to 9.800 mm2, and their total area was 64.90±2.900 mm2; the area of medium samples individually ranges from 10.60 to 27.50 mm2. Totally, they occupy an average area of 97.60±8.00 mm2. The same value of individual large aggregated nodules is between 31.40 and 60.40 mm2, which totally accounted on the average of 58.40±10.30 mm2. Thus, the average statistical value of the total areas of Peyer’s patches is 220.9±14.40 mm2, accounting for only 2% of the total area of the small intestine wall of white rats, not including single lymphoid nodules, not exceeding 1 mm.

scholarly journals EFFECT OF IMUNOPHAN ON MORPHOMETRIC PARAMETERS AND HISTOLOGICAL STRUCTURE OF PEYER'S PATCHES IN SMALL INTESTINE OF RATS UNDER IMMUNOSUPPRESSION INDUCED BY CYCLOPHOSPHAN

2021 ◽  
pp. 141-152
Author(s):  
E.N. Morozova ◽  
V.N. Morozov ◽  
A.V. Tverskaya
Keyword(s):  
Small Intestine ◽  
Lymph Nodes ◽  
White Male ◽  
Morphometric Parameters ◽  
Peyer's Patches ◽  
Male Rats ◽  
Histological Structure ◽  
Peyer’S Patches ◽  
Group 2 ◽  
Intact Rats

The aim of the study is to analyze morphometric parameters and histological structure of Peyer's patches in the small intestine of rats after imunofan administration under immunosuppression caused by cyclophosphan. Materials and Methods. The study was carried out on 36 white male rats (210–250 gramms). The animals were divided into two groups. Rats of Group 1 were injected with cyclophosphamide on the 1st day of the experiment (200 mg/kg). On the 2nd, 4th, 6th, 8th and 10th days they received imunofan (0.7 μg/kg). Group 2 consisted of intact rats. The animals were withdrawn from the experiment on the 7th, 30th, and 90th days after imunofan administration. The authors measured the length and width of Peyer's patches, and the distance from the ileocecal angle to the first patch. We also examined the height and width of lymph nodes and internodal zones on histological sections. Results. On the 7th and 30th days of our study the length and width of Peyer's patches increased by 18.71 %/16.94 % and 3.56 %/24.22 % respectively in mature animals, compared with the intact rats. At the same time, the distance from the ileocecal angle to the 1st Peyer’s patch decreased by 6.15 % and 19.80 %. The micrography showed that the height and width of the lymph nodes of Peyer's patches in experimental animals increased by 29.79 %/12.73 % (Day 7) and 10.49 %/12.46 % (Day 30) in comparison with the intact rats. The linear sizes of internodal zones increased by 39.35 %/10.33 % (Day 7) and 4.77 %/4.25 % (Day 30). By the 90th day, the macroscopic parameters of Peyer's patches, the height and width of their lymph nodules and internodal zones approxomated those of intact animals. Conclusion. When using imunofan under experimental immunosuppression, macro- and micromorphometric parameters of Peyer's patches of the small intestine of mature rats gradually approximated those in intact rats, which indicated the leveling of cyclophosphan immunosuppressive effect. Key words: rats, small intestine, Peyer's patches, imunofan, cyclophosphan. Цель исследования – изучение морфометрических параметров и гистологического строения пейеровых бляшек тонкой кишки крыс после введения имунофана на фоне иммуносупрессии, вызванной циклофосфаном. Материалы и методы. Исследование проводилось на 36 белых крысах-самцах массой 210–250 г. Животные были разделены на две группы. В I группе крысам в 1-е сут эксперимента вводился циклофосфан в дозе 200 мг/кг, на 2, 4, 6, 8, 10-е сут – имунофан в дозе 0,7 мкг/кг массы тела; II группу составили интактные крысы. Животные выводились из эксперимента на 7, 30, 90-е сут после завершения введения имунофана. Измерялись длина и ширина пейеровых бляшек, а также расстояние от илеоцекального угла до первой из них, а на гистологических срезах – высота и ширина их лимфатических узелков и межузелковых зон. Результаты. У половозрелых животных на 7-е и 30-е сут наблюдения длина и ширина пейеровых бляшек увеличивалась на 18,71 и 16,94 % и 3,56 и 24,22 % соответственно по сравнению с данными интактных крыс, а расстояние от илеоцекального угла до первой из них уменьшалось на 6,15 и 19,80 %. При микроскопическом исследовании высота и ширина лимфатических узелков пейеровых бляшек были больше по сравнению с данными интактных крыс на 29,79 и 12,73 % (7-е сут), 10,49 и 12,46 % (30-е сут), а линейные размеры межузелковых зон – на 39,35 и 10,33 % (7-е сут), 4,77 и 4,25 % (30-е сут). К 90-м сут макроскопические параметры пейеровых бляшек, а также высота и ширина их лимфатических узелков и межузелковых зон приближались к данным интактных животных. Выводы. При использовании имунофана на фоне экспериментальной иммуносупрессии значения исследуемых макро- и микроморфометрических параметров пейеровых бляшек тонкой кишки половозрелых крыс в ходе эксперимента постепенно приближались к аналогичным показателям интактных крыс, что свидетельствует о нивелировании иммуносупрессивного эффекта циклофосфана. Ключевые слова: крысы, тонкая кишка, пейеровы бляшки, имунофан, циклофосфан.

scholarly journals GENERAL HISTOLOGICAL CHARACTERISTICS OF LYMPHOID NODULES OF PEYER’S PATCHES OF THE SMALL INTESTINE IN ALBINO RATS AFTER ADMINISTRATION OF A BROAD-SPECTRUM ANTIBIOTIC

2020 ◽  
Vol 24 (3-4) ◽  
pp. 19-23
Author(s):  
V. H. Hryn ◽  
Y. P. Kostylenko ◽  
K. V. Hryn
Keyword(s):  
Small Intestine ◽  
Broad Spectrum ◽  
Peyer's Patches ◽  
Male Rats ◽  
Albino Rats ◽  
Peyer’S Patches ◽  
Antibacterial Drug ◽  
Broad Spectrum Antibiotic ◽  
Histological Characteristics ◽  
Lymphoid Nodules

Administration of an antibiotic by any route can cause dysbacteriosis, but its risk is the highest when taken orally, since the drug gets directly into the intestine, affecting microflora. After administration of a broad-spectrum antibiotic, Peyer’s patches of the small intestine of albino rats remained unchanged both topographically and in their total amount. But at the same time, their total area is more than doubled, which, according to our data, becomes possible due to the appearance of a new generation of lymphoid nodules in them. The aim of the research was to study the histological characteristics of lymphoid nodules of Peyer’s patches of the small intestine in albino rats after administration of clarithromycin. 30 mature albino male rats weighing 200.0±20.0 g were involved in the experiment. The antibiotic was administered to the rodents as a supplement to food during their two-meals-a-day feeding. Areas of the small intestine with Peyer’s patches have been studied. Serial paraffin sections have been analyzed using the “Konus” light microscope. Morphometric characteristics of the tissue structures were obtained using the Sigeta X 1 mm / 100 Div.x0.01mm stage micrometer. It has been established that after the course of administration of a broad-spectrum antibiotic (clarithromycin) in the small intestine of albino rats, the topography and total number of Peyer’s patches remain unchanged, while their total area increased by more than twice. This hyperplasia of structured lymphoid tissue in the mucous membrane of the small intestine of animals under the influence of the antibacterial drug occurs due to the appearance of new generations of lymphoid nodules in the Peyer’s patches, among which small, medium and large forms are distinguished, similar to the stages of their development. Each of them is distinguished by its morphological features, primarily, the conversion of the lymphoid-associated epithelium. Therefore, the genetically programmed total number of Peyer’s patches in the small intestine of mature albino rats is constant, whereas the number of lymphoid nodules in them is a variable that depends on the state of the intestinal microbiocenosis.

scholarly journals Effect of Giving Mahkota Dewa Fruits (Phaleria Macrocarpa) Extract to Epithelialization In Incision Wound of White Rats (Rattus Norvegicus)

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Idola Perdana Sulistyoning Suharto
Keyword(s):  
Treatment Group ◽  
Rattus Norvegicus ◽  
Male Rats ◽  
Control Group ◽  
P Value ◽  
Control Group Design ◽  
White Rats ◽  
Significant Difference ◽  
Phaleria Macrocarpa ◽  
Incision Wound

The research purpose was to analysis effect of giving mahkota dewa fruits (Phaleria macrocarpa) extract to epithelialization in incision wound of white rats (Rattus norvegicus). The method was randomized posted-only control group design. There were 30 male rats (Rattus norvegicus) grouped on control and treatment group. Control group divided into three groups (KK1, KK2, KK3) and also treatment group divided into three groups (KP1, KP2, KP3). Control group just given CMC 1% peroral without mahkota dewa fruits extract, the treatment group given mahkota dewa fruits extract 22.5 mg/kg body weight. The data was analyzed by Kruskall Wallis. Based on Kruskall Wallis test, obtained result that there was a significant difference (p<0.05) epithelialization variable with p value p = 0.000 between control and treatment group. And based on One-way Anova test, obtained result that there was a significant difference (p<0.05) with p value p =0.000 between control and treatment group. The conclusion of this research was giving mahkota dewa fruits (Phaleria macrocarpa) extract can increase epithelialization in incision wound of white rats (Rattus norvegicus). Keywords : Mahkota Dewa Fruits (Phaleria Macrocarpa) Extract, Epithelialization, Incision Wound 

scholarly journals Pengaruh Pemberian Ekstrak Rumput Laut Cokelat (Sargassum duplicatum) terhadap Peningkatan Kadar Hematokrit pada Darah Tikus Putih Jantan Galur Wistar (Rattus norvegicus) Anemia yang di Induksi NaNO2

2020 ◽  
Vol 3 (2) ◽  
pp. 38
Author(s):  
Ayu Mayang A. P. ◽  
Liliawanti Liliawanti ◽  
Wachjudi Kurnia
Keyword(s):  
Rattus Norvegicus ◽  
White Male ◽  
Brown Seaweed ◽  
Negative Control ◽  
Laboratory Method ◽  
The Body ◽  
Male Rats ◽  
Control Group ◽  
Control Group Design ◽  
Significant Difference

<p>Anemia is still a high prevalence disease in Indonesia, caused by a lack of iron in the body. The components from brown seaweed such as cobalamin (vitamin B12), pyridoxine (vitamin B6), chlorophyll and iron (Fe) can increase red blood cells in the body. The purpose of this research was to determine the effect of brown seaweed (<em>Sargassum duplicatum</em>) which can increase hematocrit levels in the blood of white male wistar strain rat (<em>Rattus norvegicus</em>) suffered from anemia in induction NaNO<sub>2</sub>.</p><p>            This research uses an experimental laboratory method with a post test only control group design. The samples were 30 male rats divided into 3 treatment groups, the negative control group (K<sub>0</sub>) without treatment, the positive control (K<sub>1</sub>) be treated anemia given NaNO<sub>2</sub> for 18 days without <em>Sargassum duplicatum </em>extract and treatment group (K<sub>2</sub>) treated with anemia given NaNO<sub>2</sub> for 18 days without <em>Sargassum duplicatum </em>extract at a dose of 2,45gr / kgBB. On the 40<sup>th</sup> day, a blood sample was taken, then measured the hematocrit level.</p><p>            The results showed that the mean number of blood hematocrit levels in K<sub>2</sub> was higher than K<sub>1</sub>, it showed a significant difference descriptively. Based on the Kruskal-Wallis test, a value of 0.260 was obtained that p &gt; 0,05 showed that there were no statistically significant differences between groups of experimental animals.</p><p>            From the results of this research, the conclusion is the administration of brown seaweed extract (<em>Sargassum duplicatum</em>) descriptively increased, but not statistically significant.</p><p> </p><p><strong>Keywords :</strong> Anemia, hematocrit, <em>Sargassum duplicatum</em>, NaNO<sub>2</sub></p>

scholarly journals THE STRUCTURE OF LYMPHOID-ASSOCIATED EPITHELIUM OF PEYERS’ PATCHES OF THE ALBINO RATS’ SMALL INTESTINE

2019 ◽  
Vol 18 (4) ◽  
pp. 67-75
Author(s):  
V. H. Hryn ◽  
Yu. P. Kostylenko
Keyword(s):  
Small Intestine ◽  
Immune Responses ◽  
Peyer's Patches ◽  
Peyer’S Patches ◽  
M Cells ◽  
Functional Polymorphism ◽  
Paraffin Sections ◽  
Mucous Membranes ◽  
Lymphoid Nodules ◽  
Hematoxylin Eosin

Over the past two decades, there have been many publications dealing with the further development of an urgent issue on the immune system of the mucous membranes of the digestive tract, called mucoseassociated lymphoid tissue (MALT), which includes spheres of innate (non-specific) and adaptive (specific) immunity. Most structured formations and indicators of adaptive immunity in the intestinal mucosa are lymphoepithelial formation (Peyer's patches). The data on the formation of the peripheral part of the immune system are carried through the epithelium, mechanisms of interaction between pathogenic intestinal microflora and immunocompetent cells, thereby initiating the development of immune responses in the mucous membranes. A concept has long been established in the literature, according to which a leading role in mediating these reactions belongs to a special type of enterocytes, called M-cells. Before the concept of the initial role of these cells in the development of immune responses in the mucous membranes of the intestinal tract they were known as caveolated cells. The purpose of this study was to determine the shape and topological relations of M-cells with other types of enterocytes, and also with lymphoid elements Peyer's patches of the small intestine. 30 mature albino male rats weighted 200,0±20,0 g were involved into the study. After vivisection, which was carried out by an overdose of thiopental anesthesia (75 mg / kg of animal body weight intramuscularly in the upper third of the thigh of the hind paw) [1] in compliance with the requirements for dissection of the abdominal cavity, the entire complex of the gastrointestinal tract was removed, which was preserved in 10 % formalin solution. Subsequently, short sections of the small intestine, containing Peyer’s patches, were selectively excised. Finding the latter was not difficult due to their clear visualization on the external (nonmesenteric) surface of the small intestine in the form of whitish spots. The specimens, after washing from formalin and dehydration in alcohol of increasing concentration, were embedded into paraffin blocks, from which serial sections of 4 µm thick (Microm HM 325) were obtained with subsequent staining with hematoxylin-eosin and Van Gieson. Their study and documentation was carried out using the “Konus” light microscope equipped with the Sigeta DCM-900 9.0MP digital microphoto attachment and the Biorex 3 program (serial number 5604) adapted for these studies. In the study of many series of paraffin sections stained with hematoxylin-eosin, it was found that while maintaining the general shape of the structure, lymphoid nodules are susceptible to plastic variability, which depends on situationally changing factors of antigenic effect, i.e., functional polymorphism is characteristic of them. This is especially true of their lymphoidassociated epithelium, which appears in a rather diverse form, which depends not only on the section angle, but also, probably, on its reactive state. Thus, in some cases it is a relatively even monolayer of intestinal epithelium, consisting mainly of absorbing enterocytes, among which the most distinct are goblet cells. At the same time, it draws attention to itself that in the apical sections of some of them there are clear signs of rupture of the plasmolemma and the presence in the cytoplasm of basophilic granular fibrous material of an unknown nature. Along with this picture, other histological sections of large lymphoid nodules of Peyer's patches of the small intestine demonstrate a different configurational character of lymphoid-associated epithelium, in which the cluster principle of cell distribution in the form of limited portioned sets is clearly noted. While maintaining the general structural shape, Peyer's patches were found to be subjected to plastic variability, which depends on situationally changing factors of antigenic exposure, i.e., functional polymorphism is characteristic of them. This is especially true of their lymphoid-associated epithelium. Identification of M-cells using only traditional histological methods in practice is complicated. And yet, in the process of a focused study of serial paraffin sections, it was possible to detect some morphological signs indicating their location.

scholarly journals Differences in Histopathological Picture of Lung Organs in Sprague Dowley White Rats that Die Drowning in Salt Water and Fresh Water

2021 ◽  
Vol 11 (3-S) ◽  
pp. 163-169
Author(s):  
Theza E. A. Pellondo’u.P ◽  
Marliana Nurprilinda ◽  
Yoan Marsindhy Rahayu Atuk
Keyword(s):  
Fresh Water ◽  
Salt Water ◽  
Male Rats ◽  
Control Group ◽  
Sprague Dawley ◽  
Water Group ◽  
White Rats ◽  
Significant Difference ◽  
Post Test ◽  
The Subject

This study aimed to investigate the differences in the pulmonary histopathology of the drowned victims in salt water and fresh water. By utilizing a post-test only control design, the research used Sprague Dawley lab rat as the main subject of the experiment. The subject would be drowned in two different types of water, which were salt water and fresh water. There were fifteen male rats which divided evenly into three separate groups. The first group was subjected to salt water, and the second group was subjected to fresh water. The last group was a control group. The result from the test was analyzed by comparing the lung tissue histopathological structure of the subject for the salt water group and the fresh water group. On the outcome, there was a significant difference between interalveolar haemorrhage in the lung of a mouse drowned in salt water and submerged in fresh water. In addition, there was over-distension of the alveoli, thinning of the alveolar septal wall in both groups. The result of the experiment showed that there was a significant interalveolar haemorrhage difference in the histopathological structure between the salt water group and the fresh water group. Keywords: pulmonary histopathology, drowning, alveolus, white rat

scholarly journals Features of angioarchitectonics and structure of the aortic wall of white rats in the early stages of experimental diabetes mellitus

Morphologia ◽  
2021 ◽  
Vol 15 (3) ◽  
pp. 167-174
Author(s):  
M.N. Tsytovskyi ◽  
M.V. Logash ◽  
I.I. Savka ◽  
G.M. Dmytriv
Keyword(s):  
Diabetes Mellitus ◽  
Aortic Wall ◽  
Experimental Diabetes ◽  
White Male ◽  
Male Rats ◽  
White Rats ◽  
Significant Difference ◽  
Streptozotocin Induced Diabetes ◽  
Atherosclerotic Cardiovascular Diseases ◽  
Imagej Software

Background. Atherosclerotic cardiovascular diseases, as well as coronary heart disease, cerebrovascular disease, and peripheral artery disease (probably caused by atherosclerosis), are the leading cause of disability and mortality in people with diabetes. Objective. The purpose of our study was to determine the histostructural features and morphometric analysis of the components of the aortic wall and its hemomicrocirculatory bed after 2 and 4 weeks of streptozotocin-induced diabetes mellitus. Methods. The samples for the histology were the sections of the wall of the ascending part, the aortic arch, and the descending part of the aorta of 26 mature white male rats weighing 100 - 160 g. For morphometric examination, a series of images of the aortic wall was taken using a Meiji MT4300 LED microscope with an x40 objective, x10 eyepiece. Results and conclusion. The measurements were carried out using the ImageJ software. The development of micro- and macroangiopathies in experimental animals with 8-week streptozotocin-induced diabetes mellitus was histologically proved. Statistical analysis revealed a significant difference of all morphometric parameters of both - the components of the aortic wall and the vessels of its hemomicrocirculatory bed after 4 weeks of experimental diabetes in comparison with the norm, control, and the 2-nd week of the experiment. An explicit dependency of the severity of destructive changes in the wall of the aorta and links of its hemomicrocirculatory bed of vessels on the duration of the experiment was determined.

scholarly journals Anti-inflammatory Activity of Ethanol Extract of Lotus (Nelumbo nucifera G.) Seed Against White Male Rats Using Paw Edema Method

2021 ◽  
Vol 11 (4) ◽  
pp. 1-4
Author(s):  
Khairani Fitri ◽  
Tetty Noverita Khairani ◽  
Kristin Tiurma Sianturi ◽  
Leny Leny ◽  
Ihsanul Hafiz
Keyword(s):  
White Male ◽  
Ethanol Extract ◽  
Nelumbo Nucifera ◽  
Inflammatory Activity ◽  
Male Rats ◽  
Control Group ◽  
Paw Edema ◽  
White Rats ◽  
Activity Test ◽  
Anti Inflammatory

The purpose of this study was to determine the anti-inflammatory activity test of ethanol extract of lotus seeds in rats induced by carrageenan. The research method used was experimental. The object used in this study was male white rats. Observations were made for 6 hours and then the data were analyzed using the one way analysis of variance (ANOVA) test. The anti-inflammatory activity test was carried out on the test animals which were divided into 5 groups, 3 each with the suspension test group with a dose of 200, 300, 400 mg/kg bw, the negative control group was the CMC Na 1% suspension and the positive control was diclofenac Na 2, 25 mg/kg bw. The results showed that the ethanol extract of the seeds of lotus (Nelumbo nucifera G) was proven to have an anti-inflammatory effect on carrageenan-induced male white rats at doses of 200, 300 and 400 mg/kg BW with the percentage value of inflammation inhibition at the 6th hour was 65.79, 74.65 and 80.77%, with the most effective dose in reducing anti-inflammatory drugs being 400 mg/kg bw. The ethanol extract of the seeds of lotus (Nelumbo nucifera) has anti-inflammatory activity. Keywords: anti-inflammatory activity, Nelumbo nucifera, paw edema

Ultramicroscopic structure of peyer’s patches in the rats’ small intestine after imunofan correction of experimental immunosuppression

2021 ◽  
Vol 22 (2) ◽  
pp. 36-39
Author(s):  
Е. N. Morozova ◽  
◽  
V. N. Morozov ◽  
S. V. Zabolotnaya ◽  
T. A. Mikhailik ◽  
...  
Keyword(s):  
Endoplasmic Reticulum ◽  
Standard Technique ◽  
Uranyl Acetate ◽  
Peyer's Patches ◽  
Granular Endoplasmic Reticulum ◽  
Male Rats ◽  
Control Group ◽  
Peyer’S Patches ◽  
Stromal Component ◽  
Group 1

Aim. To study the structure of Peyer’s patches at the ultramicroscopic level after the administration of imunofan against the background of experimentally modeled immunosuppression caused by the administration of cyclophosphamide. Materials and methods. The study was carried out on 36 white mature male rats, divided into 2 groups. The Group 1 included rats, which on the 1st day of the experiment were injected with cyclophosphamide at a dose of 200 mg/kg, and then imunofan according to the scheme on days 2, 4, 6, 8, 10 at a dose of 0.7 μg/kg of body weight. Group 2 was formed from rats, which were injected with an equivalent amount of isotonic sodium chloride solution. Animals of the Group 1 were Taken out from the experiment on the days 7 and 30 after the correction of cyclophosphamide-induced immunosuppression with imunofan. Pieces of Peyer’s patches were isolated and processed according to a standard technique. Ultrathin sections were contrasted in a solution of uranyl acetate and lead citrate according to E. Reynolds and studied under an electron microscope with further photographing. Results. It was found that lymphocytes, in most cases, are tightly adjacent to each other on the days 7 and 30 after the correction of cyclophosphamide-induced immunosuppression with imunofan; in the control group, the stroma is more often located between them. In the nucleus of these cells, heterochromatin is located in clumps and adjoins the nuclear membrane; in the control group, it fills two-thirds of the karyoplasm. The cells with patterns of mitosis, lymphoblasts are often found, macrophages contain large lysosomes on days 7 and 30 of experiment, compared with the control group of rats. In plasmocytes, the granular endoplasmic reticulum occupied up to 2/3 of the cell cytoplasm. The stromal component is well expressed in the control group of animals, compared with the experimental one, and is represented by reticulocytes, reticular fibers and vessels, and fibroblastic reticular cells are also found. Conclusion. In an ultramicroscopic study, the administration of the immunomodulator imunofan against the background of cyclophosphamide-induced immunosuppression promoted an increase in lysosomes in macrophages, lymphoblasts, cells with mitotic patterns, as well as the development of a granular endoplasmic reticulum on days 7 and 30 of the experiment, compared with the control group.

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