Age-related changes of nasal cavity and conchae volumes and volume fractions in children: a stereological study

Background: The anatomy of the human nasal cavity (NC) is complex and its structures are closely related to the functions of the NC. Studies which assessing the mean volumes of NC and conchae are very infrequent. The purpose of current study is to investigate development of NC and conchae according to age and sex by using stereological method. Materials and methods: This retrospective volumetric study was carried out on 342 individuals (166 females and 176 males) between 0 and 18 years old with no pathological conditions or medical procedures that affected the skeletal morphology of the NC. Volumetric estimations were determined on computed tomography (CT) images using point-counting approach of stereological methods. Results: NC, inferior nasal conchae (INC) and middle nasal conchae (MNC) volume measurements that obtained using point-counting method were increased with age in both sexes until 15 years old. Regardless of gender; no significant difference was determined between the left and right values for NC, conchae volumes and choanae measurements. Generally, significant differences were determined in NC and INC volumes according to gender after they reached maximum growth period. According to age the volume ratios of INC to NC and MNC to NC were ranged from 18% to 32% and 9% to15%, respectively. Conclusions: The current study demonstrated that the point-counting method is effective in determining volume estimation of NC and is well suited for CT studies. Our results could provide volumetric indexes for the NC and conchae, which could help the physician for both patient selections for surgery, and for the assessment of any surgical technique used to treatment of nasal obstruction. (

Investigation of argyrophilic nucleolar organizing region

BACKGROUND: Ischemia/reperfusion (I/R) injury is a complex event frequently observed in vascular surgery and can cause functional and structural cell damage. Nucleolar-organizing regions (NORs) are sites of the ribosomal genes located on chromosomes and can be stained with silver when they are active. Thus these proteins are named as argyrophilic-NOR (AgNOR)-associated proteins. We aimed to investigate any possible effects of renal I/R injury on the NOR protein synthesis and association between the AgNOR proteins amount and histopathological injuring score

Investigation of argyrophilic nucleolar organizing region

BACKGROUND: Ischemia/reperfusion (I/R) injury is a complex event frequently observed in vascular surgery and can cause functional and structural cell damage. Nucleolar-organizing regions (NORs) are sites of the ribosomal genes located on chromosomes and can be stained with silver when they are active. Thus these proteins are named as argyrophilic-NOR (AgNOR)-associated proteins. We aimed to investigate any possible effects of renal I/R injury on the NOR protein synthesis and association between the AgNOR proteins amount and histopathological injuring score. METHODS: Nine female wistar-albino rats with weight of 200-250g were included into the study. The animals were randomly divided in two groups, a Control Group and an I/R Group. In I/R group, rats were subjected to 45 minutes of renal pedicle occlusion followed by 24 hours of reperfusion. In the control group no drug injections or ischemia reperfusion were performed in animals. Then histopathological injury score, mean AgNOR number and total AgNOR area/nuclear area (TAA/NA) were detected for each rat. RESULTS: The differences between control and I/R groups were significant for histopathological injury scores (p = 0.016). Also the differences between control group and I/R group were significant for mean AgNOR number (p = 0.000) and TAA/NA ratio (p = 0.000). Additionally, there was a positive correlation between TAA/NA ratio and histopathological injury score (r = 0.728; p = 0.026) and between mean AgNOR number and histopathological injury score (r = 0.670; p = 0.048). CONCLUSION: The detection of AgNOR proteins amount may be used as an indicator to obtain information about the cellular behaviour (self-protective mechanism of tubular epithelial cells) against I/R injury and cellular damage levels (Tab. 2, Fig. 4, Ref. 24). Text in PDF www.elis.sk

The potential teratogenic effects of interferon beta-1a and interferon beta-1b on in vitro embryonic development

Background: Interferon beta (IFNb) was the first proven drug for the treatment of multiple sclerosis (MS). The diagnosis of MS frequently occurs in women at childbearing age (especially in twenties and thirties). Therefore, the pregnancy process is major concern for many women with MS. Data on women exposed to IFNb during pregnancy are limited. The aim of our study was to investigate the teratogenic potential of IFNb on embryonic development via embryo culture technique. Recently, this technique has been often used for determining teratogenic effect of pharmacologic drugs and potential teratogens on embryonic development. Materials and methods: In this study, IFNb was applied to the culture medium and after 48 h of culture effects of IFNbs (1000 IU/IFNb-1a and 1000 IU/IFNb-1b) on embryonic development were morphologically investigated. Results: According to morphologic scoring system, total morphologic score, somite number and protein contents were similar between control group and two experimental groups (p > 0.05). On the other hand, yolk sac diameter, crown- -rump length and head length were significantly decreased in two experimental groups compared with control group (p < 0.05). Conclusions: Consequently, IFNb-1a and IFNb-1b, applied to the culture medium, have no macroscopic teratogenic effect on embryonic development. However, in respect of morphometric measurements, IFNb-1a and IFNb-1b have caused growth retardation in embryo. This research related to interferon was the first study using vitro embryo culture technique; thus, in our point of view, future studies which will be performed by using different doses of IFN will contribute to the literature

Age-related changes of nasal cavity and conchae volumes and volume fractions in children: a stereological study

Background: The anatomy of the human nasal cavity (NC) is complex and its structures are closely related to the functions of the NC. Studies which assessing the mean volumes of NC and conchae are very infrequent. The purpose of current study is to investigate development of NC and conchae according to age and sex by using stereological method

The potential teratogenic effects of interferon beta-1a and interferon beta-1b on in vitro embryonic development

WOS: 000378127700017PubMed ID: 26711647Background: Interferon beta (IFN beta) was the first proven drug for the treatment of multiple sclerosis (MS). The diagnosis of MS frequently occurs in women at child-bearing age (especially in twenties and thirties). Therefore, the pregnancy process is major concern for many women with MS. Data on women exposed to IFN beta during pregnancy are limited. The aim of our study was to investigate the teratogenic potential of IFN beta on embryonic development via embryo culture technique. Recently, this technique has been often used for determining teratogenic effect of pharmacologic drugs and potential teratogens on embryonic development. Materials and methods: In this study, IFN beta was applied to the culture medium and after 48 h of culture effects of IFN beta s (1000 IU/IFN beta-1a and 1000 IU/IFN beta-1b) on embryonic development were morphologically investigated. Results: According to morphologic scoring system, total morphologic score, somite number and protein contents were similar between control group and two experimental groups (p > 0.05). On the other hand, yolk sac diameter, crown- rump length and head length were significantly decreased in two experimental groups compared with control group (p < 0.05). Conclusions: Consequently, IFN beta-1a and IFN beta-1b, applied to the culture medium, have no macroscopic teratogenic effect on embryonic development. However, in respect of morphometric measurements, IFN beta-1a and IFN beta-1b have caused growth retardation in embryo. This research related to interferon was the first study using vitro embryo culture technique; thus, in our point of view, future studies which will be performed by using different doses of IFN will contribute to the literature

The effect of triclosan on in vitro embryonic development in rat [Triklosanın in vitro embriyonik rat gelişimi üzerine etkisi]

Triclosan (TCS) is a broad spectrum antimicrobial agent showing its effect by deactivating the fatty acid synthesis of bacteria. The aim of this study was to investigate the effects of TCS on in vitro embryonic development in rats and to determine the levels of caspases 2, 7, 8, and 9 inducing cells to apoptosis through gene expression. According to the TCS dose added to the culture whole rat serum, 3 experimental groups and a control group were formed with each including 10 embryos. After 48 h culturing period, embryos were subjected to morphological scoring for developmental evaluation. The levels of caspases 2, 7, 8, and 9 were measured by performing gene expression on 40 embryos. Significant decreases were obtained in all parameters of morphological scoring in the experimental groups as the dose of TCS increased. While the caspase-2 level showed a significant decrease among the groups and was inversely proportional to the level of TCS, the caspase-9 level showed a significant increase among the groups and was directly proportional to the level of TCS. In conclusion, TCS was determined to cause apoptosis in the cells via the intrinsic pathway during pregnancy period and lead to embryonic growth retardation, which increased with increased dose of TCS. © 2020, Veteriner Fakultesi Dergisi. All rights reserved

The relationship of argyrophilic proteins of the nuclear-organized regions and atopic dermatitis in children

Background: The argyrophilic proteins of nuclear-organized regions (AgNOR), visualised with colloidal silver methods as black dots are known as AgNOR. To date, the relationship between AgNOR and cancer and inflammatory conditions has been investigated. However, there has been no report investigating the relationship between AgNOR and atopic dermatitis. The aim of this study was to investigate the relationship between atopic dermatitis and AgNOR in paediatric patients. Methods: Twenty-nine children with atopic dermatitis and 23 healthy children were included in the study. AgNOR test results were analysed prospectively. Results: The mean AgNOR number (40.19 ± 21.06) in the patient group was significantly higher than the control group (12.83 ± 10.40) (P <.001). Conclusions: This study investigated the association between AgNOR and atopic dermatitis for the first time in the literature. In the study, atopic dermatitis and AgNOR were found to be related. In the study, for the first time with the ROC analysis, AgNOR limit values with high sensitivity and specificity levels were determined in the diagnosis of atopic dermatitis