Abstract 13869: Inflammatory Changes in the Lungs of Rats Exposed to E-cigarettes Without Marijuana, Vitamin E Oil, or Nicotine

Circulation ◽  
2020 ◽  
Vol 142 (Suppl_3) ◽  
Author(s):  
Jianru Shi ◽  
Michael T Kleinman ◽  
Rebecca J Arechavala ◽  
Dave Herman ◽  
Irene Hasen ◽  
...  
Keyword(s):  
Vitamin E ◽  
High Power ◽  
Inflammatory Cells ◽  
Lung Parenchyma ◽  
Heating Element ◽  
Chromium Alloy ◽  
Sprague Dawley ◽  
High Power Field ◽  
Quantitative Manner ◽  
Inflammatory Changes

Background: Recently, the clinical entity of EVALI (E-cigarette or vaping product use associated lung injury) was described and has similarities to COVID -19 pneumonia. We determined in a quantitative manner the inflammatory changes in the lungs associated with EVALI in a rodent model that does not include use of marijuana, vitamin E oil, or nicotine, which had been implicated as a cause. Methods: Adult Sprague Dawley rats were exposed to either pure air (n=5) or electronic cigarette (eC) vapor (propylene glycol/vegetable glycerin, tobacco flavoring) using a device with a nickel-chromium alloy (NC) heating element at 70 Watts (n=6) for 2 hours. The e-liquid did not contain nicotine, marijuana, or Vitamin E oil. Rats were euthanized within a few days of exposure and H&E-stained lung sections were assessed. Inflammatory cells were counted from 10 random areas per section at 20х magnification. Results: Alveolar structure appeared normal in the air group (Figure, panel C); the eC group using the NC heating element showed alveolar inflammation (D). The numbers of inflammatory cells per high power field in the lung parenchyma were significantly greater in the rats exposed to eC using NC heating element (67.5 ± 44.5) compared to the air group (6.7 ± 0.3; P < 0.001, Kruskal-Wallis test). The predominant cell type was mononuclear and secondary were neutrophils. Other features included accumulation of fibrin and inflammatory cells in the lumen of the trachea (A); thickened alveolar walls; and red blood cell congestion (D). Inflammation of the nasal passages was also observed (B). Exposure of rats to e cigarettes using a stainless steel heating element did not result in EVALI, and the amount of inflammatory cells was closer to air exposed rats (7.2± 0.4). Conclusion: Vaping using a nichrome heating element at high power leads to respiratory tract pathology and a significant increase in the number of inflammatory cells in the alveoli. EVALI occurred without marijuana, vitamin E oil or nicotine.

scholarly journals Histological Scoring of Rectal Mucosa by Digital Quantitative Method in Bangladeshi Subjects

2009 ◽  
Vol 22 (2) ◽  
pp. 190-193
Author(s):  
MMH Chowdhury ◽  
MA Alim ◽  
MA Haque ◽  
MK Rahman ◽  
I Mahmood ◽  
...  
Keyword(s):  
Lamina Propria ◽  
High Power ◽  
Quantitative Method ◽  
Quantitative Methods ◽  
Rectal Mucosa ◽  
Inflammatory Cells ◽  
Inflammatory Condition ◽  
High Power Field ◽  
Chronic Inflammatory Condition ◽  
Ankylosing Spodylitis

Chronic inflammation is characterized by increased numbers of round cells in lamina propria, associated with irregularity of glandular system and increasing number of glands per area. But still there is no objective way to demarcate between normal and diseased mucosa by counting the number of inflammatory cells. Until date it is done arbitrarily which depends primarily upon the knowledge and experience of pathologist. So this study has been done with aims to score normal rectal mucosal histology using digital quantitative methods in Bangladeshi subjects. The variable recorded were the diameter of ten consecutive transversely cut glands, the space of lamina propria between glands and number of gland per high power field .Thirty patients with ankylosing spodylitis having normal rectal mucosa were enrolled for histological.scoring by digital quantitative methods. In this study it is found that 90% of subjects have the score of 17 or less. This data obtained serve as a basis for demarcating the histological state of rectal mucosa from various chronic inflammatory condition of rectum.TAJ 2009; 22(1): 190-193

scholarly journals Is There Pathological Uniformity between the Periphery and Center of a Gastrointestinal Stromal Tumor?

2021 ◽  
Vol 10 (4) ◽  
pp. 687
Author(s):  
Seong Ji Choi ◽  
Kwan Hong Lee ◽  
Chan Kyoo Yoo ◽  
Jai Hoon Yoon ◽  
Ki Seok Jang ◽  
...  
Keyword(s):  
Risk Stratification ◽  
Mitotic Index ◽  
High Power ◽  
Malignant Potential ◽  
Mitotic Count ◽  
Pathological Diagnosis ◽  
High Power Field ◽  
Gastric Gists ◽  
Significant Difference ◽  
The Mean

Background: Gastrointestinal stromal tumors (GISTs) are mesenchymal tumors and have some malignant potential. Mitotic count is important for predicting the malignant potential of GISTs. Proper treatment of GISTs requires accurate pathological diagnosis. In general, endoscopic ultrasound-guided fine-needle aspiration and deep biopsy are used for pathological diagnosis of GIST before making decisions about surgery. This study sought to evaluate the pathological uniformity of gastric GISTs for mitotic index of the center and periphery of the GIST. Methods: We retrospectively reviewed the data of 37 gastric GIST patients who underwent wedge resection at Hanyang University Hospital. We used Armed Forces Institute of Pathology criteria to classify gastric GISTs. To determine the pathological uniformity of gastric GISTs, we compared GIST risk stratification between the center and periphery of GISTs. Results: The mean size of GISTs was 3.56 ± 2.10 cm. Three lesions were located in the antrum, 11 in the fundus, 9 in the cardia, and 14 in the body. The mean age of patients was 58.65 ± 9.44 years; 18 patients were male and 19 were female. Thirty-five patients (94.6%) showed the same level of risk stratification between the center and periphery of gastric GISTs, while two patients (5.4%) presented different levels of risk between the two sites. No significant difference in mitotic count was observed between the two sites (kappa value = 0.863; p = 0.001). Conclusions: Mitotic index category (either more than five mitoses per high-power field or five or fewer mitoses per high-power field) of GISTs showed good concurrence between the center and periphery.

Automated image analysis of nuclear atypia in high-power field histopathological image

2015 ◽  
Vol 258 (3) ◽  
pp. 233-240 ◽  
Author(s):  
CHENG LU ◽  
MENGYAO JI ◽  
ZHEN MA ◽  
MRINAL MANDAL
Keyword(s):  
Image Analysis ◽  
High Power ◽  
Automated Image Analysis ◽  
High Power Field ◽  
Nuclear Atypia ◽  
Histopathological Image

scholarly journals Low-Dose Radiotherapy for Late-Stage COVID-19 Pneumonia?

Dose-Response ◽  
2020 ◽  
Vol 18 (3) ◽  
pp. 155932582095135
Author(s):  
Michael I. Koukourakis
Keyword(s):  
Respiratory Failure ◽  
Immune Cells ◽  
Late Stage ◽  
Low Dose ◽  
Inflammatory Cells ◽  
Lung Parenchyma ◽  
Death Rates ◽  
Low Dose Radiotherapy ◽  
Therapeutic Value ◽  
Inflammatory Effect

Low dose radiotherapy has been used in the pre-antibiotic era for the treatment of all kind of pneumonia, with relative success. The unimaginable daily death toll of thousands of victims dying from COVID-19 pneumonia and the marginal therapeutic value of agents tested, brings forward the re-evaluation of the position of radiotherapy in the treatment of late stage lethal COVID-induced respiratory failure. A sound biological rationale supports this idea. Immunopathology studies show that excessive inflammation and infiltration of the lung parenchyma by immune cells is the cause of death. Mice lacking IFNαβ receptors remain unaffected by the virus. Radiotherapy at doses of 50-200cG may exert an intense anti-inflammatory effect and reduce the burden of inflammatory cells infiltrating the lungs. Whether radiotherapy, in conjunction with remdesivir and/or macrolides can reduce the dramatic death rates related to COVID-19 is an open challenge, under the absence of an alternative solution.

Mitotic counts in one high power field in breast core biopsies is equivalent to counts in 10 high power fields

Pathology ◽  
2021 ◽  
Author(s):  
Whayoung Lee ◽  
Timothy Law ◽  
Yunxia Lu ◽  
Thomas K. Lee ◽  
Julio A. Ibarra
Keyword(s):  
High Power ◽  
High Power Field

Febrile Infants at Low Risk for Serious Bacterial Infection—An Appraisal of the Rochester Criteria and Implications for Management

PEDIATRICS ◽  
1994 ◽  
Vol 94 (3) ◽  
pp. 390-396 ◽  
Author(s):  
Julie A. Jaskiewicz ◽  
Carol A. McCarthy ◽  
Amy C. Richardson ◽  
Kathleen C. White ◽  
Donna J. Fisher ◽  
...  
Keyword(s):  
Confidence Interval ◽  
High Power ◽  
Microscopic Examination ◽  
Bacterial Infections ◽  
Antimicrobial Agents ◽  
Low Risk ◽  
High Power Field ◽  
Urine Sediment ◽  
Predictive Values ◽  
Risk Criteria

Objective. Prospective studies were conducted to test the hypothesis that infants unlikely to have serious bacterial infections (SBI) can be accurately identified by low risk criteria. Methods. Febrile infants (rectal T ≥ 38°C) ≤60 days of age were considered at low risk for SBI if they met the following criteria: 1) appear well; 2) were previously healthy; 3) have no focal infection; 4) have WBC count 5.0-15.0 x 109 cells/L (5000-15 000/mm3), band form count≤ 1.5 x 109 cells/L (≤1500/mm3), ≤10 WBC per high power field on microscopic examination of spun urine sediment, and ≤5 WBC per high power field on microscopic examination of a stool smear (if diarrhea). The recommended evaluation included the culture of specimens of blood, cerebrospinal fluid, and urine for bacteria. Outcomes were determined. The negative predictive values of the low risk criteria for SBI and bacteremia were calculated. Results. Of 1057 eligible infants, 931 were well appearing, and, of these, 437 met the remaining low risk criteria. Five low risk infants had SBI including two infants with bacteremia. The negative predictive value of the low risk criteria was 98.9% (95% confidence interval, 97.2% to 99.6%) for SBI, and 99.5% (95% confidence interval, 98.2% to 99.9%) for bacteremia. Conclusions. These data confirm the ability of the low risk criteria to identify infants unlikely to have SBI. Infants who meet the low risk criteria can be carefully observed without administering antimicrobial agents.

High-intensity training induces EIB in rats through neuron transdifferentiation of adrenal medulla chromaffin cells

2013 ◽  
Vol 304 (9) ◽  
pp. L602-L612 ◽  
Author(s):  
Ruoxi He ◽  
Juntao Feng ◽  
Qiufen Xun ◽  
Qingwu Qin ◽  
Chengping Hu
Keyword(s):  
Adrenal Medulla ◽  
Chromaffin Cells ◽  
Cell Structure ◽  
Fold Increase ◽  
Inflammatory Cells ◽  
Whole Body ◽  
Moderate Intensity ◽  
Sprague Dawley ◽  
Exercise Interventions ◽  
Intensity Training

A high prevalence of exercise-induced bronchoconstriction (EIB) can be found in elite athletes, but the underlying mechanisms remain elusive. Airway responsiveness, NGF and epinephrine (EPI) levels, and chromaffin cell structure in high- (HiTr) and moderate-intensity training (MoTr) rats with or without ovalbumin (OVA) sensitization were measured in a total of 120 male Sprague-Dawley rats. The expression of NGF-associated genes in rat adrenal medulla was tested. Both HiTr and OVA intervention significantly increased airway resistance to aerosolized methacholine measured by whole body plethysmography. HiTr significantly increased inflammatory reaction in the lung with a major increase in peribronchial lymphocyte infiltration, whereas OVA significantly increased the infiltration of various inflammatory cells with an over 10-fold increase in eosinophil level in bronchoalveolar lavage. Both HiTr and OVA intervention upregulated circulating NGF level and peripherin level in adrenal medulla, but downregulated phenylethanolamine N-methyl transferase level in adrenal medulla and circulating EPI level. HiTr + OVA and HiTr + ExhEx (exhaustive exercise) interventions significantly enhanced most of the HiTr effects. The elevated NGF level was significantly associated with neuronal conversion of adrenal medulla chromaffin cells (AMCC). The levels of p-Erk1/2, JMJD3, and Mash1 were significantly increased, but the levels of p-p38 and p-JNK were significantly decreased in adrenal medulla in HiTr and OVA rats. Injection of NGF antiserum and moderate-intensity training reversed these changes observed in HiTr and/or OVA rats. Our study suggests that NGF may play a vital role in the pathogenesis of EIB by inducing neuron transdifferentiation of AMCC via MAPK pathways and subsequently decreasing circulating EPI.

Mast Cells in Hemangiomas and Vascular Malformations

PEDIATRICS ◽  
1982 ◽  
Vol 70 (1) ◽  
pp. 48-51
Author(s):  
Julie Glowacki ◽  
John B. Mulliken
Keyword(s):  
Mast Cells ◽  
High Power ◽  
Vascular Malformations ◽  
Normal Skin ◽  
High Power Field ◽  
Proliferative Phase ◽  
Large Numbers ◽  
Endothelial Proliferation ◽  
Vascular Birthmarks

Common pediatric vascular birthmarks, classified as hemangiomas or malformations, were analyzed for the presence of mast cells. Hemangiomas in the proliferative phase contained large numbers of mast cells (27 ± 15 cells/high-power field [HPF]) in comparison with hemangiomas in the involuting phase (2.6 ± 2.9), vascular malformations (1.7 ± 3.2), and normal skin (5.0 ± 1.0). Inasmuch as hemangiomas are characterized by endothelial proliferation and increased numbers of mast cells, these data raise the possibility that mast cells may have an important role in the formation and/or maintenance of these lesions.

Sign in / Sign up

Export Citation Format

Share Document