Ten-year experience of transbronchial endosonography in single center

Objective Transbronchial endosonography (EBUS) is a relatively new method for diagnosing of the pathological condition of the thoracic organs. Analysis of 10 years of our experience in the use of transbronchial endosonography in a specialized center.Material and Methods During the period from April 2010 to April 2020, 756 transbronchial endosonographies were conducted on 756 patients. The studies were carried out for various indications: 1) Group 1 (483) – transbronchial puncture of the lymph nodes in order to obtain morphological confirmation of the etiology; 2) Group 2 (260) – staging of suspected or verified lung cancer to determine the descriptor N; 3) Group 3 (13) – a study that ended only with obtaining an endosonographic image. All patients underwent transbronchial endosonography using the special ultrasound bronchoscope EB-1970UK (Pentax Corp.) and the ultrasound scanner EUB 5000 Plus G OB/GYN – Vascular Ultrasound (HITACHI Corp.).Results General information content was 78%; verification of mediastinal lymphadenopathy was 72% (57, 79, 58% for smears, cytoblocks and smears + cytoblocks, cytoblocks vs smears + cytoblocks, p < 0.05). Verification of local changes in the mediastinum – 66%; verification of peribronchial tumor – 87%. Lung cancer staging – 87% (82, 88, 86% for smears, cytoblocks vs smears + cytoblocks, respectively, р > 0.05)Conclusion Тhe diagnostic utility of EBUS for the verification of mediastinal lymphadenopathy can range from 37,5 to 83% and rise with increasing experience for all persons involved. The use of cytoblocks showed the best results. The diagnostic utility of staging varies from 60 to 100% and does not depend on the method of processing the aspiration material

Granulomatous inflammation of Mycoplasma and Chlamydia etiology

Problem of differential diagnostics of granulematous diseases remains actual till nowadays. Despite the use of modern radiological, microbiological, immunological and routine morphological methods they don’t allow always to formulate correct diagnosis. Use of immunechistochemistry frequently reveals the pathogen, this is very important to elaborate the tactic of patients treatment. In the paper are clinically characterized 17 cases in which clinical and laboratory data allowed to exclude tuberculosis and sarcoidosis. Are presented morphological data concerning mycoplasmosis (4) and chlamydiosis (4). As an example are given the details related to the first in the literature observation of respiratory granulematous chlamydiosis

High prevalence of genotype B0/W148 of Mycobacterium tuberculosis among HIV-TB patients in Perm Krai and Irkutsk Region

Background. The population with HIV-infection plays significant role in ongoing tuberculosis pandemic. Immunosuppression due to HIV-infection is one of the causes of TB disseminated forms in this group of people. Having low immune status is also often associated with a polyclonal M. tuberculosis infection. Aim of the research: comparative assessment of epidemic genotypes of M. tuberculosis prevalence and mixed genotypes identification within HlV-TB co-infected patients in two Russian regions. Materials and methods. The DNAs of 78 clinical isolates from Irkutsk Region (IR) and 64 strains from Perm Krai (PK) have been genotyped by MIRU VNTR 24 and RD105/RD207. Strains were obtained from patients who did not have significant age and sex differences. In the PK age of the patients was 34.5 ± 0.9, in IR - 34.4 ± 1.5 years. The samples were obtained from 67.2 and 65.4 % of men, respectively. Result. The study of the M. tuberculosis indicates significant predominance of Beijing genotype strains in patients with TB-HIV of PK (92.2 %) compared to the IR (59.5 %) (х2 = 18.0; p < 0.01). The prevalence of MDR pathogens in TB-HIV patients exceeded 50 %. The mixed genotype detection in the PK and IR was high (14.1 and 12.7 % respectively). The level of virulent strains B0/W148 was 34.4 % in PK patients and 25.3 % in IR ones. Analysis of the results suggests the epidemic spread of MDR-TB in the immunocompromised individuals. Conclusions: The identified trends may indicate that Perm Kray have a process of active dissemination of transmissible strains of M. tuberculosis within HIV-infected population

Deletion of Fibroblast Growth Factor Receptor 2 from the Peri-Wolffian Duct Stroma Leads to Ureteric Induction Abnormalities and Vesicoureteral Reflux

Purpose: Pax3cre-mediated deletion of fibroblast growth factor receptor 2 (Fgfr2) broadly in renal and urinary tract mesenchyme led to ureteric bud (UB) induction defects and vesicoureteral reflux (VUR), although the mechanisms were unclear. Here, we investigated whether Fgfr2 acts specifically in peri-Wolffian duct stroma (ST) to regulate UB induction and development of VUR and the mechanisms of Fgfr2 activity. Methods: We conditionally deleted Fgfr2 in ST (Fgfr2 ST-/- ) using Tbx18cre mice. To look for ureteric bud induction defects in young embryos, we assessed length and apoptosis of common nephric ducts (CNDs). We performed 3D reconstructions and histological analyses of urinary tracts of embryos and postnatal mice and cystograms in postnatal mice to test for VUR. We performed in situ hybridization and real-time PCR in young embryos to determine mechanisms underlying UB induction defects. Results: We confirmed that Fgfr2 is expressed in ST and that Fgfr2 was efficiently deleted in this tissue in Fgfr2 ST-/- mice at embryonic day (E) 10.5. E11.5 Fgfr2 ST-/- mice had randomized UB induction sites with approximately 1/3 arising too high and 1/3 too low from the Wolffian duct; however, apoptosis was unaltered in E12.5 mutant CNDs. While ureters were histologically normal, E15.5 Fgfr2 ST-/- mice exhibit improper ureteral insertion sites into the bladder, consistent with the ureteric induction defects. While ureter and bladder histology appeared normal, postnatal day (P) 1 mutants had high rates of VUR versus controls (75% versus 3%, p = 0.001) and occasionally other defects including renal hypoplasia and duplex systems. P1 mutant mice also had improper ureteral bladder insertion sites and shortened intravesicular tunnel lengths that correlated with VUR. E10.5 Fgfr2 ST-/- mice had decreases in Bmp4 mRNA in stromal tissues, suggesting a mechanism underlying the ureteric induction and VUR phenotypes. Conclusion: Mutations in FGFR2 could possibly cause VUR in humans. © 2013 Walker et al

Криобиопсия в морфологической верификации центрального рака легких с некрозом

Background. The diagnostic yield of a standard forceps biopsy for central lung cancer is 74 %. However, the diagnostic value is significantly reduced in the presence of necrosis in the tumor. In Russia, cryobiopsy for central lung cancer diagnosis is currently used only in a few clinical centers.The purpose of this study is to present a series of clinical cases showing the effectiveness of the cryobiopsy method in the morphological verification of central neoplasms with necrosis.Description of clinical cases. The article presents 3 clinical cases of patients with central lung cancer, in which standard forceps biopsy was ineffective due to the presence of severe necrosis in the tumor. The cryobiopsy performed at the second stage made it possible in all cases to obtain a suffcient amount of morphological material for histological and immunohistochemical studies and to reconalize the lumens of the large bronchi.Conclusion. Cryobiopsy is an effective and safe method of morphological verification of central lung cancer, which has an advantage over standard forceps biopsy, especially in the presence of a visible necrotic component in the tumor structure. Актуальность. Диагностическая ценность стандартной щипцовой биопсии центрального рака легкого составляет 74 %. При этом информативность значительно снижается при наличии некроза в опухоли. В России на настоящий момент криобиопсия для диагностики центрального рака легкого применяется лишь в нескольких клинических центрах.Цель исследования – представить серию клинических случаев, показывающих эффективность метода криобиопсии в морфологической верификации центральных новообразований с некрозом.Описание клинических случаев. В статье представлены 3 клинических случая пациентов с центральным раком легкого, у которых стандартная щипцовая биопсия была неэффективна из-за наличия выраженного некроза в опухоли. Криобиопсия, выполненная на втором этапе обследования, позволила во всех случаях получить достаточное количество морфологического материала для гистологического и иммуногистохимического исследования и реканализировать просветы крупных бронхов.Заключение. Криобиопсия – эффективный и безопасный метод морфологической верификации центрального рака легкого, имеющий преимущества перед стандартной щипцовой биопсией, в особенности при наличии видимого некротического компонента в структуре опухоли

Immunopurification of Pathological Prion Protein Aggregates

Background: Prion diseases are fatal neurodegenerative disorders that can arise sporadically, be genetically inherited or acquired through infection. The key event in these diseases is misfolding of the cellular prion protein (PrP) into a pathogenic isoform that is rich in β-sheet structure. This conformational change may result in the formation of PrP, the prion isoform of PrP, which propagates itself by imprinting its aberrant conformation onto PrP molecules. A great deal of effort has been devoted to developing protocols for purifying PrP for structural studies, and testing its biological properties. Most procedures rely on protease digestion, allowing efficient purification of PrP27-30, the protease-resistant core of PrP. However, protease treatment cannot be used to isolate abnormal forms of PrP lacking conventional protease resistance, such as those found in several genetic and atypical sporadic cases. Principal Findings: We developed a method for purifying pathological PrP molecules based on sequential centrifugation and immunoprecipitation with a monoclonal antibody selective for aggregated PrP. With this procedure we purified full-length PrP and mutant PrP aggregates at electrophoretic homogeneity. PrP purified from prion-infected mice was able to seed misfolding of PrP in a protein misfolding cyclic amplification reaction, and mutant PrP aggregates from transgenic mice were toxic to cultured neurons. Significance: The immunopurification protocol described here isolates biologically active forms of aggregated PrP. These preparations may be useful for investigating the structural and chemico-physical properties of infectious and neurotoxic PrP aggregates

Tetraspanin CD151 is a novel prognostic marker in poor outcome endometrial cancer

BACKGROUND: Type II cancers account for 10% of endometrial cancers but 50% of recurrence. Response rates to chemotherapy at recurrence are poor and better prognostic markers are needed to guide therapy. CD151 is a small transmembrane protein that regulates cell migration and facilitates cancer metastasis. High CD151 expression confers poor prognosis in breast, pancreatic and colorectal cancer. The prognostic significance of tetraspanin CD151 expression in poor outcome endometrial cancers was evaluated, along with oestrogen receptor (ER), progesterone receptor (PR), p53, human epidermal growth factor receptor -2 (HER-2), and CD 151 staining compared with α6β1, α3β1 integrins, and E-cadherin. METHODS: Tissue microarray constructed from 156 poor outcome endometrial cancers, tested with immunohistochemistry and staining correlated with clinicopathological data were used. A total of 131 data sets were complete for analysis. RESULTS: Expression of CD151 was significantly higher in uterine papillary serous and clear cell carcinoma than in grade 3 endometrioid carcinoma, sarcoma or carcinosarcoma (P<0.001). In univariate analysis, age, stage, histology type and CD151 were significant for both recurrence free (RFS) and disease specific survival (DSS). In multivariate analyses, CD151 was significant for RFS and DSS (P=0.036 and 0.033, respectively) in triple negative (ER, PR and HER-2 negative) tumours (88/131). The HER-2, p53, ER and PR were not prognostic for survival. There was strong concordance of CD151 with E-cadherin (98%), but not with α6β1 (35%), α3β1 staining (60%). CONCLUSION: The CD151 is a novel marker in type 2 cancers that can guide therapeutic decisions. CD151 may have an important role in tumourigenesis in some histology types

Влияние препарата «Кумазид» на функциональное состояние внутренних органов крыс

An investigation of Kumazid medication influence on functional condition of experimental animal main organs and and systems, that were subjected to intragastric injection during three monthes, was made. It was determined that the Kumasid medication dosed 1—100 mkg/kg administrated to rats intragastically during three monthes doesn’t change internal conditions of lab animals.Проведено исследование влияния препарата «Кумазид» на функциональное состояние основных органов и систем при длительном (3-месячном) внутрижелудочном введении препарата экспериментальным животным. Установлено, что препарат «Кумазид» при 3-месячном курсе внутрижелудочного введения крысам в дозах 1-100 мкг/кг массы тела не оказывает достоверных изменений состояния внутренних органов лабораторных животных