Background: Allergic and atrophic forms of chronic rhinitis are common among the population, characterized by a chronic progressive course with a tendency toward increasing prevalence. Worldwide, allergic rhinitis affects approximately 10–40% of adults and 2–25% of children. According to a study conducted in Mongolia, the prevalence of allergic rhinitis among adults in Ulaanbaatar was reported to be 23.6%, with an increasing trend anticipated in the future. In allergic and atrophic rhinitis, structural alterations occur in the nasal mucosa, including disruption of the normal architecture of the pseudostratified epithelium and ciliated cells, accompanied by changes in goblet cell number and dysfunction of their activity, resulting in a complex pathological process. In otorhinolaryngology practice in Mongolia, there is a relative lack of studies investigating the ultrastructural changes of the nasal mucosa in allergic and atrophic rhinitis. Aim: To compare ultrastructural and histological changes of the nasal mucosa in allergic and atrophic rhinitis. Materials and Methods: Ethical approval was obtained from the Research Ethics Review Committee of the Mongolian National University of Medical Sciences at the meeting held on April 24, 2020 (Protocol No. 2020/З-04). Appropriate ethical permission was also obtained from the EMJJ ENT Hospital. Nasal mucosal tissue samples were collected from surgically resected specimens of patients aged 20–45 years diagnosed with allergic and atrophic rhinitis. The mucosal specimens were processed at the Institute of Biomedical Sciences of the Mongolian National University of Medical Sciences. Samples were fixed and dehydrated according to the protocol, coated with 100 Å gold, and examined using a scanning electron microscope (FEI Quanta FEG 250, USA). In addition, paraffin blocks were prepared, sectioned at 4 μm thickness, stained with Hematoxylin and Eosin, and analyzed histologically. Results: In allergic rhinitis, the pseudostratified epithelium was relatively preserved; however, disorganization of ciliated cells, partial loss of cilia, and goblet cell hyperplasia were observed. In contrast, atrophic rhinitis showed epithelial thinning, near-complete loss of ciliated structures, glandular atrophy, and submucosal fibrosis. Conclusion Allergic rhinitis is associated with relatively mild and predominantly functional mucosal alterations, whereas atrophic rhinitis demonstrates severe structural damage with irreversible impairment of mucosal protective function.

Introduction: Since 1993, the Inula helenium L. plant has been planted in the production area (Bulgan Province, Dashinchilen Sum) of the Traditional Hatchery Science and Production Corporation’s medicinal plant introduction and cultivation experience. At the Drug Research Institute, there is also a botanical institute for medicinal plants where it is grown. In traditional Mongolian medicine, the roots and rhizomes of Inula helenium L. are used to reduce inflammation, boost immunity, enhance hunger, and improve intestinal motility. Inula helenium L. roots and rhizomes contain biologically active compounds such as monoterpenes, sesquiterpenes, phenols, flavonoids, and polysaccharides. Methods: The roots and rhizomes of Inula helenium L. were extracted with water and 70% ethanol at the following ratios 1:10 (2% of WAC), 1:8, and 1:6 by partial maceration at 700C for 2 hours each, extracted and concentrated. The dry extract was obtained by the spray drying procedure. High-performance liquid chromatography for determining the content of alantolactone, thin-layer chromatography for qualitative analysis. Spectrophotometer for determining the content of polyphenolic compounds, colored compounds with Folin-Ciocalteu reagent for qualitative analysis. Spectrophotometer for determining the content of inulin, and colored compounds with phenol and sulfuric acid solutions for qualitative analysis. Conclusion In determining the content of polyphenolic compounds, inulin, and alantolactone in the dry extract taken from the roots and rhizomes of cultivated Inula helenium L., the content of polyphenolic compound in dry extract A was 2.50±0.08%, and alantolactone was 1.39±0.11% in the raw material of the plant, while B dry the extract had a high concentration of inulin of 58.51±0.66%.