scholarly journals Morphological features of changes in peripheral olfactory structures in SARS-COV-2 coronavirus infection

Pathologia ◽  
2021 ◽  
Vol 18 (3) ◽  
pp. 278-285
Author(s):  
I. S. Shponka ◽  
V. I. Popovych ◽  
О. М. Usova ◽  
O. O. Bondarenko ◽  
Yu. V. Haman ◽  
...  
Keyword(s):  
Angiotensin Converting Enzyme ◽  
Mucous Membrane ◽  
Olfactory Mucosa ◽  
Field Of View ◽  
Control Group ◽  
Converting Enzyme ◽  
Marker Protein ◽  
Olfactory Marker Protein ◽  
Olfactory Bulbs ◽  
Coronavirus Infection

Coronavirus infection caused by the SARS-CoV-2 virus is an extremely important and urgent problem of modern medicine. It spreads quickly, has a high probability of a severe course and a large number of critical complications in patients from the risk group. The presence of pathognomonic symptoms, one of which is the development of hypo– or anosmia, makes it possible to quickly differentiate coronavirus infection from other acute respiratory viral infections, that is, to isolate the patient on time and begin correct treatment, taking all possible risks into account. The aim is to identify the morphological features of olfactory structural elements in patients with coronavirus disease (COVID-19) for a better understanding of the mechanisms of olfactory disorders development in coronavirus infection. Materials and methods. The basis of the work is a retrospective analysis of autopsy material, namely the mucous membrane of the upper parts of the nasal cavity (olfactory epithelium) and olfactory bulbs of nine deceased (4 women and 5 men) aged from 53 to 79 years with a laboratory-confirmed diagnosis of COVID-19 and anosmia in anamnesis. We used standard hematoxylin and eosin staining and immunohistochemical reactions in accordance with the TermoScientific protocols (USA) with antibodies to neurospecific beta-III tubulin (clone TuJ-1) and RnDsystems protocols with antibodies to olfactory marker protein (OMP) and angiotensin converting enzyme (ACE-2). To compare the results, a control group of 9 deaths (3 women and 6 men) aged from 59 to 68 years with a laboratory-refuted diagnosis of COVID-19 was formed. The causes of death of these patients were complications of diabetes, coronary heart disease and cerebrovascular disorders of the ischemictype. Results. The average age of the deceased with a laboratory-confirmed diagnosis of COVID-19 and a history of anosmia and the control group was 64.67 ± 7.73 and 62.33 ± 6.48 years, respectively. The expression of olfactory marker protein (OMP) and neurospecific beta-III tubulin (clone TuJ-1) was partially positive (40.89 (25.00–52.00) and 42.44 (29.00–55.00) cells in the field of view at a magnification of 200×, respectively) in seven out of nine sections of the olfactory mucous membrane of deaths with a laboratory-confirmed diagnosis of COVID-19 and anosmia in anamnesis. The reaction with antibodies to angiotensin converting enzyme (ACE-2) was focally or subtotally absent (34.33 (14.00–49.00) cells in the field of view at 200× magnification). There was expression of these three markers in control sections of the olfactory mucosa of a deceased with a laboratory excluded diagnosis of COVID-19 and no symptoms of anosmia (Mann–Whitney test, P < 0.05). In sections of olfactory bulbs of patients with COVID-19 weak (Mann–Whitney test, P < 0.05) expression of receptors for angiotensin-converting enzyme (ACE-2) (26.78 (15.00–39.00) cells in field of view at a magnification of 200×) was revealed in contrast to control sections (100.56 (94.00–107.00) cells in the field of view at a magnification of 200×). Conclusions. The development of anosmia in SARS-CoV-2 coronavirus infection has specific features. This may be due to the primary destruction of cells expressing receptors for the angiotensin-converting enzyme (ACE-2-positive: sustentacular cells of the olfactory mucosa, neurons of the olfactory bulbs). Subsequent dysfunction of olfactory cells (OMP- and TuJ-1-positive) is also possible.

The olfactory system is affected by steroid aerosol treatment in mice

2009 ◽  
Vol 297 (6) ◽  
pp. L1073-L1081 ◽  
Author(s):  
C. Mucignat-Caretta ◽  
M. Bondí ◽  
A. Rubini ◽  
F. Calabrese ◽  
A. Barbato
Keyword(s):  
Olfactory System ◽  
Respiratory Mechanics ◽  
Corticosteroid Treatment ◽  
Olfactory Mucosa ◽  
Olfactory Function ◽  
Continuous Treatment ◽  
Control Group ◽  
Olfactory Marker Protein ◽  
Mild Impairment

Asthma needs continuous treatment often for years. In humans, some drugs are administered via aerosol, therefore they come in contact with both respiratory and olfactory mucosa. We explored the possibility that antiasthma corticosteroid treatment could influence the olfactory function by passage through the nose. A group of mice was exposed twice daily for 42 days to fluticasone propionate aerosol and was compared with a control group. Olfactory behavior, respiratory mechanics, histology, and immunoreactivity in the olfactory system were assessed. Fluticasone-treated mice were slower in retrieving a piece of hidden food, but both groups were similarly fast when the food was visible. When a clearly detectable odor was present in the environment, all mice behaved in a similar way. Respiratory mechanics indices were similar in all mice except for the viscose resistance, which was reduced in fluticasone-treated mice. Olfactory mucosa of fluticasone-treated mice was thicker than that of controls. Slight but consistent differences in staining were present for Olfactory Marker Protein but not for other proteins. A mild impairment of olfactory function is present in mice chronically treated with fluticasone aerosol, apparently accompanied by slight modifications of the olfactory receptor cells, and suggests monitoring of olfactory function modifications in long-term steroid users.

scholarly journals Elite athletes and the gene for angiotensin-converting enzyme

1999 ◽  
Vol 87 (3) ◽  
pp. 1035-1037 ◽  
Author(s):  
Roger R. Taylor ◽  
Cyril D. S. Mamotte ◽  
Kieran Fallon ◽  
Frank M. van Bockxmeer
Keyword(s):  
Angiotensin Converting Enzyme ◽  
Indirect Evidence ◽  
Cardiovascular Complications ◽  
Genotype Frequency ◽  
Community Control ◽  
Control Group ◽  
Converting Enzyme ◽  
Athletic Ability ◽  
Genotype Frequencies ◽  
Ace Genotype

The deletion (D) allele of the gene for angiotensin-converting enzyme (ACE) is associated with higher plasma and tissue levels of the enzyme and has also been related to a variety of cardiovascular complications, particularly myocardial infarction. On the basis of indirect evidence, we hypothesized that inheritance of the D allele would contribute to elite athletic ability. Over a period of 4 yr, 120 Caucasian athletes who were national (Australian) representatives in sports demanding a high level of aerobic fitness were recruited. Their ACE genotypes were compared with those of a community control group recruited randomly from the electoral roll. There was no difference in ACE genotype frequencies between the two groups. The DD genotype frequency was 30% in athletes and 29% in the control group, and the II genotype frequency was 22.5 and 22%, respectively. The results do not exclude the possibility that ACE genotype could be related to some attribute relating to a specific type of elite athletic ability or that there may be a difference between genders. Larger studies are desirable.

scholarly journals COMPARISON OF THE STATE OF THE MAXILLARY SINUSES IN A NEW CORONAVIRUS INFECTION COVID-19 AND ACUTE RESPIRATORY VIRAL INFECTION

2021 ◽  
Vol 14 (5) ◽  
pp. 28-33
Author(s):  
ALEXANDER V. KOLSANOV ◽  
◽  
TATYANA JU. VLADIMIROVA ◽  
PAVEL V. ZELTER ◽  
OLESYA V. ZELYOVA ◽  
...  
Keyword(s):  
Mucous Membrane ◽  
Paranasal Sinuses ◽  
Chronic Sinusitis ◽  
Respiratory Infections ◽  
Control Group ◽  
Acute Respiratory Infections ◽  
Lower Wall ◽  
Study Results ◽  
Coronavirus Infection ◽  
Maxillary Sinuses

The aim of the study was to identify possible changes in the maxillary sinuses during new coronavirus infection in comparison with the changes in the sinuses occurring during acute respiratory infections and to correlate the gender structure of the study groups. Material and methods. The study included 40 patients (18 women and 22 men) with a confirmed new coronavirus infection, hospitalized at the Covid Hospital Clinics of Samara State Medical University in 2020. All patients underwent multispiral computed tomography of the paranasal sinuses on a Ge revolution Evo 128 tomograph on the 10th day after the appearance of the first clinical symptoms. We also examined a control group of patients with acute respiratory infections with similar complaints of impaired sense of smell, rhinorrhea, and upper maxillary sinus discomfort. This group also included 40 people (24 women and 16 men). Statistical processing of the study results was performed using Microsoft Excel software package, the Mann – Whitney method of statistical significance calculation was used. Results and discussions. In 18 (45%) patients with a confirmed new coronavirus infection, a slight mucosal thickening along the lower wall of the maxillary sinuses was found symmetrically on both sides. Six (15%) of them were women and 12 (30%) were men. The age of the examined patients ranged from 31 to 83 years. Chronic sinusitis was noted in the history of 8 (20%) of the examined patients. In 6 (15%) patients with chronic sinusitis no abnormalities were detected in the maxillary sinuses at the time of examination. Two of them had parietal thickening of the mucous membrane along the lower wall of the maxillary sinuses. In the control group, there was significant symmetric parietal thickening of the mucous membrane of the paranasal sinuses in 24 (60%) examined patients (14 women and 10 men). There were no statistically significant differences in the prevalence of changes in the studied and control groups. Conclusion. According to the results of this study, there were no data on the pattern of occurrence of changes in the mucosa of the maxillary sinuses in new coronavirus infection with gender background or the presence of chronic inflammation of the maxillary sinuses in the history compared with the control group of examined patients after acute respiratory infections.

scholarly journals Comparative Effects of Preoperative Angiotensin-converting Enzyme In-hibitor, Statin and Beta-blocker Treatment on Human Internal Mammary Artery Reactivity in Patients with Coronary Artery Disease: A Pilot Study

2013 ◽  
Vol 7 (1) ◽  
pp. 69-75 ◽  
Author(s):  
Selvinaz Dalaklioglu ◽  
Ilhan Golbasi ◽  
Caglar Ogutman
Keyword(s):  
Angiotensin Converting Enzyme ◽  
Beta Blocker ◽  
Bypass Surgery ◽  
Internal Mammary Artery ◽  
Ace Inhibitor ◽  
Control Group ◽  
Maximal Effect ◽  
Converting Enzyme ◽  
Significant Difference ◽  
Internal Mammary

Purpose: We investigated the effect of angiotensin-converting enzyme (ACE)- inhibitor, statin, and beta-blocker usage before coronary bypass surgery (CABG) on vascular reactivity of the internal mammary artery (IMA). Methods: Patients, who underwent elective CABG were evaluated. Samples of IMA obtained from 22 patients were divided into 4 groups in respect of drugs used by patients before bypass surgery (control group, ACE inhibitor + statin group, ACE inhibitor + statin + beta-blocker group, and ACE inhibitor + beta-blocker group). The discarded, distal end section of IMA was carefully removed, and the vasoreactivity of IMA rings was evaluated in vitro using an organ chamber. Smooth muscle contractile function was tested on artery segments exposed to 10-80 mM KCl and norepinephrine. The endothelial function of IMA rings was assessed with acetylcholine (ACh) and bradykinin, while endothelium-independent vasorelaxation was evaluated by sodium nitroprusside (SNP). Results: Both ACh and bradykinin caused concentration-dependent relaxation in endothelium-intact IMA rings. However, the maximal effect produced by endothelium-dependent agents in all treatment groups was more prominent when compared with the control group. There was no significant difference in the endothelium-dependent relaxation response of IMA between ACE inhibitor + statin, ACE inhibitor + beta-blocker and ACE inhibitor + statin + beta-blocker groups. The vasodilatory potency of SNP was similar in all groups. Similarly, contractile response to KCl or norepinephrine was not significantly different between groups. Conclusion: Use of ACE inhibitors and statins before bypass surgery may influence IMA vasoreactivity by improving endothelial control of vascular tone.

scholarly journals The potential role of serum angiotensin-converting enzyme in coronavirus disease 2019

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Zhe Zhu ◽  
Ting Cai ◽  
Lingyan Fan ◽  
Kehong Lou ◽  
Xin Hua ◽  
...  
Keyword(s):  
Angiotensin Converting Enzyme ◽  
Clinical Condition ◽  
Recovery Phase ◽  
Control Group ◽  
Converting Enzyme ◽  
Baseline Serum ◽  
Serum Angiotensin Converting Enzyme ◽  
Severe Group ◽  
Ace Activity

Abstract Background To explore the clinical significance of serum angiotensin-converting enzyme (ACE) activity in coronavirus disease 2019 (COVID-19). Methods In this retrospective study, a total of 136 consecutive patients with confirmed COVID-19 were recruited. Demographic and clinical data were recorded. The serum ACE activity was measured at baseline and during the recovery phase, and its relationship with clinical condition was analyzed. Results Of the 136 patients with confirmed COVID-19, the 16 severe patients were older and had a higher body mass index (BMI) and proportion of hypertension than the 120 nonsevere patients. In comparison to those of normal controls, the baseline serum ACE activities of subjects in the severe group and nonsevere group were decreased, with the lowest level in the severe group. However, the serum ACE activity increased in the recovery phase, and there were no significant differences among the severe group, nonsevere group and normal control group. Conclusion Serum ACE activity could be used as a marker to reflect the clinical condition of COVID-19 since low activity was associated with the severity of COVID-19 at baseline, and the activity increased with the remission of the disease.

scholarly journals Attenuation of angiotensin converting enzyme inhibitor induced cough by iron supplementation: role of nitric oxide

2011 ◽  
Vol 12 (4) ◽  
pp. 491-497 ◽  
Author(s):  
Payal Bhalla ◽  
Narinder Pal Singh ◽  
Krishnan Ravi
Keyword(s):  
Nitric Oxide ◽  
Angiotensin Converting Enzyme ◽  
Angiotensin Converting Enzyme Inhibitor ◽  
Iron Supplementation ◽  
Enzyme Inhibitor ◽  
Ferrous Sulphate ◽  
Control Group ◽  
Converting Enzyme ◽  
Converting Enzyme Inhibitor ◽  
Observation Period

The present study examined whether (1) the cough associated with angiotensin converting enzyme inhibitor therapy is attenuated by oral intake of iron and anti-oxidants, and (2) nitric oxide (NO) has any role in this attenuation. Of the 100 patients under investigation, cough occurred in 28 of them with preponderance in females. All the 28 patients were followed up for six weeks: the first two weeks were the observation period and the remaining four weeks the experimentation period. After the observation period, 11 patients received a single oral dose of ferrous sulphate (200 mg), eight received vitamin E (200 mg, o.d.) and vitamin C (150 mg, o.d.) and nine were given placebo during the experimentation period. Cough scoring, serum NO and malondialdehyde (MDA) levels were determined during both the periods. While there were significant decreases in cough scores, NO and MDA levels between these two periods in the iron group, cough scores and MDA level decreased significantly in the anti-oxidant group. None of these parameters changed in the control group. NO level was found to be increased significantly in patients who developed cough ( n = 28) compared with those who did not cough ( n = 72). These results suggest that iron supplementation suppresses cough in patients on ACE-I therapy through its effect on NO generation.

scholarly journals The potential role of serum angiotensin-converting enzyme in coronavirus disease 2019

2020 ◽  
Author(s):  
Zhe Zhu ◽  
Ting Cai ◽  
Lingyan Fan ◽  
Kehong Lou ◽  
Xin Hua ◽  
...  
Keyword(s):  
Angiotensin Converting Enzyme ◽  
Clinical Condition ◽  
Recovery Phase ◽  
Control Group ◽  
Converting Enzyme ◽  
Baseline Serum ◽  
Serum Angiotensin Converting Enzyme ◽  
Severe Group ◽  
Ace Activity

Abstract Background To explore the clinical significance of serum angiotensin-converting enzyme (ACE) activity in coronavirus disease 2019 (COVID-19).Methods In this retrospective study, a total of 136 consecutive patients with confirmed COVID-19 were recruited. Demographic and clinical data were recorded. The serum ACE activity was measured at baseline and during the recovery phase, and its relationship with clinical condition was analyzed.Results Of the 136 patients with confirmed COVID-19, the 16 severe patients were older and had a higher body mass index (BMI) and proportion of hypertension than the 120 nonsevere patients. In comparison to those of normal controls, the baseline serum ACE activities of subjects in the severe group and nonsevere group were decreased, with the lowest level in the severe group. However, the serum ACE activity increased in the recovery phase, and there were no significant differences among the severe group, nonsevere group and normal control group.Conclusion Serum ACE activity could be used as a marker to reflect the clinical condition of COVID-19 since low activity was associated with the severity of COVID-19 at baseline, and the activity increased with the remission of the disease.

scholarly journals Insertion/deletion of angiotensin-converting enzyme gene polymorphism as a marker of polycystic ovary syndrome (PCOS) development in South Indian cohort women

2020 ◽  
pp. 27-31
Author(s):  
Nishu Sekar ◽  
Abilash Valsala Gopalakrishnan
Keyword(s):  
Angiotensin Ii ◽  
Polycystic Ovary Syndrome ◽  
Angiotensin Converting Enzyme ◽  
Allele Frequency ◽  
Polycystic Ovary ◽  
Control Group ◽  
Converting Enzyme ◽  
The South ◽  
Ovary Syndrome ◽  
South Indian

Polycystic ovary syndrome (PCOS) is an endocrine/metabolic disease because of the elevated levels of androgen which could lead to anovulation. The angiotensin-converting-enzyme (ACE) is a zinc metallopeptidase that converts angiotensin I to angiotensin II. ACE is bound to the plasma membrane and expressed in many tissues such as ovarian tissues. The renin-angiotensin system (RAS help the production of angiotensin, angiotensinogen, and ACE. Angiotensin II plays a major role in ovulation, steroidogenesis, follicular atresia and hyperandrogenic syndromes such as PCOS. This study aimed to determine the association of ACE polymorphism in PCOS to analyze the distribution allele frequency of insertion or deletion variation in PCOS patients of the South Indian cohort. A total of 430 women with PCOS confirmed based on the Rotterdam criteria and 300 age and sex-matched control samples were studied. PCR technique was used to determine the frequency of polymorphism in the ACE gene. The genotyping distribution of II, DD and ID in PCOS was 4.56%, 30.23%, and 65.11%, respectively, whereas the control group showed 30%, 20%, and 50% for II, DD and ID, respectively. The deletion (D) allele frequency was 62.79% and insertion (I) allele was 37.2 % in PCOS patients, whereas in the control group, it was 45% and 55% for D and I alleles, respectively. This study concludes that the distribution of deletion (D) allele frequency of ACE could be considered as a genetic marker for PCOS in the South Indian cohort.

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