جستجوی مقالات مرتبط با کلیدواژه « inflammatory cytokine » در نشریات گروه « پزشکی »

Immune-inflammatory responses appear to play a key role in severe SARS-CoV-2 infections. Interleukin-35 (IL-35) and presepsin (PSN) are inhibitory cytokine and pro-inflammatory interleukin, which play a crucial role in the immune system modulation, respectively. Therefore, the study of IL-35 and PSN interaction with other parameters may be critical for managing patients with COVID-19.

A total of 125 severe/critical COVID-19 patients and 60 healthy persons as a control group were enrolled in this work. These patients were admitted to Marjan medical city and Al-Sadeq hospital in Iraq during February to August 2022 and diagnosed as severe cases depending on the SpO2 percentage according to the guidelines released by the National Health World. Anti- and pro-inflammatory cytokines (IL-35 and PSN) were detected by ELISA technique.

Presepsin showed a positive correlation with admission to the respiratory care unit (RCU) (r= .022, p= .011). A negative correlation was found between presepsin and C- reactive protein (CRP) (r= .21, p= .018). Both PSN and IL-35 in biochemical tests showed a positive strong effect on glucose levels in COVID-19 patients (r= .234, p= .008 and r= .241, p= .007, respectively). IL-35 had a positive impact on alkaline phosphatase (ALP) (r= .28, p= .002). Hemoglobin (Hb) level showed a positive correlation with presepsin (r= .2, p= .02).

This study confirms the growing evidence showing the direct role of regulatory pro-inflammatory cytokines in the development and control of COVID-19 through the interaction with other parameters.

It is known that inflammatory responses occur in the airways of patients with non-cystic fibrosis bronchiectasis during respiratory exacerbations but the role of these cytokines is not clear in this condition. Herein we evaluated the levels of interleukin-1b (IL-1b), IL-8 and tumor necrosis factor a (TNF-a) in the serum and bronchoalveolar lavage among children with non-cystic fibrosis bronchiectasis.
This cross-sectional study was performed on all children with non-cystic fibrosis bronchiectasis who were admitted with respiratory exacerbation in the pediatric pulmonology ward of Masih Daneshvari Hospital, Tehran-Iran. All patients underwent fiberoptic bronchoscopy and spirometry before and after the bronchoscopy. IL-1b, IL-8, and TNF-a levels were measured in the serum and bronchoalveolar lavage.
Patients included 10 (59%) female and 7 (41%) male subjects with mean age of 13.8 years (range, 5-18). Mean values for forced vital capacity (FVC) and forced expiratory volume in one second (FEV1) were below the normal range before and after bronchoscopy. Mean value for FVC (from 55% to 63%, P= 0.01) and FEV1 (from 60% to 64%, P= 0.26) increased after bronchoscopy compared to before that. IL-1b and IL-8 levels were increased and TNF-a level was decreased in the serum and bronchoalveolar lavage but no significant correlation was found between spirometry and these cytokines levels.
Changes in inflammatory cytokines levels in serum and bronchoalveolar lavage during respiratory exacerbation in patients with non-cystic fibrosis bronchiectasis have no significant correlation with spirometry and cannot be used in clinical practice.

The northern coastal regions of Iran are endemic for leptospirosis which may range from a subclinical illness to a progressively fatal disease. There has been growing evidence that inflammatory markers play a significant role in the severity and prognosis of leptospirosis. This study aimed to investigate inflammatory cytokines in patients with leptospirosis.

This descriptive-analytical prospective study was performed in 75 patients over 18 years old who had a positive microscopic agglutination test (MAT) titer from January to June 2019. SPSS software Version 20 was used for statistical analysis and the significance level was considered as p<0.05.

The patients’ age enrolled in this study are from 21 to 75 years with a mean and standard deviation of 48.6 ± 14.0. The male to female ratio in our participants was 54/21. Fever was the most common symptoms in 66 (88.0%) patients, followed by myalgia in 62 (82.7%) cases. The level of interleukin 10 was significantly higher in severe illness (P=0.003) and fatal cases (p<0.028) compared with recovered patients. The level of TNF-α level was also higher in the severe illness and Weil's syndrome compared with the mild kind (P=0.022).

Our results showed that the levels of TNF-α and IL-10 significantly increased in severe leptospirosis. Also, IL-10 was significantly higher in fatal cases. The inhibition of IL-10 production might play an important role in decreasing the risk of fatal outcomes in leptospirosis.

Spirulina (Arthrospira) exerts a wide spectrum of pharmacological activities that are largely attributed to its phycobiliprotein content,  mainly  to  C-phycocyanin.  C-Phycocyanin  is  a  natural  blue  pigment  with  many commercial  applications  in  foods, cosmetics, and medicines.  In this study, the stimulatory effect of  C-phycocyanin on the immune system was investigated using blood tissue and Peripheral  Blood  Mononuclear  Cells  (PBMC)  and  the  measurement  of  inflammatory  cytokine,  interferon-gamma, which  has important effects on dedicated immune responses. For this purpose, extraction of PBMC blood cells from blood tissue The range of  purified  C-phycocyanin  extract  concentrations  with  drug  puritywas:  1  µg/ml,  10  µg/ml,  100  µg/ml,  250  µg/ml.  Then, the response of PBMC cells to C-phycocyanin at the protein level was investigated. Finally, interferon-gamma was measured using the culture supernatant and ELISA sandwich method.  Descriptive  analysis  of  the  read  concentrations  results  by  ELISA  technique  showed  that  C-phycocyanin  is dosedependent  and  the  results  of  the  effect  of  C-phycocyanin  on  PBMC  cells  in  blood  tissue  showed  the strengthening  of  the immune system by increasing the amount of inflammatory cytokines. According to the results of the analysis of variance, it isobserved that the p-value is less than 0.05. This means there is a significant difference between the mean read concentration of ELISA in different concentrations of cytokines. The results of the experiments demonstrate that C-phycocyanin activates PBMC cells in a manner that is consistent with the recruitment of diverse populations of leukocytes in response to inflammatory and infectious signals.

Maternal stress during pregnancy leads to neuroinflammation of the fetus and cognitive disorders in children. On the other side, Trichostatin A (TSA) as a histone deacetylase inhibitor has anti-inflammatory and neuroprotective effects. The aim of the present study was an evaluation of TSA effect on amelioration of spatial memory deficit and modification of pro-inflammatory cytokines in rat’s hippocampus of prenatal footshock stress model. In the present study, 24 pregnant Wistar rats were divided into 4 groups including control, PFS+Saline, PFS+TSA5, and PFS+TSA10. In order to induce prenatal footshock stress (PFS), the pregnant rats were subjected to electrical shock at 1 mA, 50 Hz for 2 seconds with 5 repetitions at 3-minute intervals from 12 to 18 days of pregnancy. Two hours before applying the shock intraperitoneal administration of TSA was performed daily. When the offsprings were one-month old, their spatial memory was assessed by the Morris water maze. Finally, the levels of pro-inflammatory cytokines (TNF-α, IL-1β, and IL-6) were measured by ELISA method. a reduction in spatial memory and an increase in the level of TNF-α, IL-1β, and IL-6 were observed in PFS+Saline group compared to the control. Besides, spatial learning showed a significant increase in TSA-treated groups compared to PFS+Saline. TSA with anti-inflammatory effects led to the reduction of hippocampal inflammatory cytokines and amelioration of spatial memory in offsprings who were exposed to stress in the prenatal period.

The effect of changes in intestinal microbiota on constipation is contraversial. Constipation is more prevalent in elderly. Therefore, the current study was designed to assess the role of modulating inflammatory cytokines in old age patients with constipation by evaluating the serum levels of tumor necrosis factor alpha (TNF-α), interleukin 1 (IL-l), and interleukin 6 (IL-6).
This case-control study was done on 100 participants, aged 65 years or higher, with and without functional constipation according to ROME III criteria (50 participants in each group). Baseline demographic, clinical characteristics, and serum levels of TNF-α, IL-1, and IL-6 were compared between the case and control groups. Independent t test and Chi-square test were used for analysis of data.
Mean levels of TNF-α, IL-1, and IL-6 were (666.80±101.40 pg/mL vs. 489.20±53.68 pg/mL, pThis study showed a significant association between the serum level of modulating inflammatory cytokines and age-related constipation in Iranian subjects. It seems that the serum level of modulating inflammatory cytokines can be affected by diversity and abundance in the gut microbiota. The role of diversity in microbial population and their abundance in gut must be evaluated in further studies.

Intermittent hypoxia (IH), caused by obstructive sleep apnea (OSA), could cause hippocampus or neuron damage through multiple signaling pathways, while the underlying mechanisms are still unclear. Thus, the present study aimed to explore the effect of IH on the biological functions of microglia cells.
Cell proliferation of BV2 cells after exposure to IH were observed by MTT assay and then DNA damage was detected by comet assay. RNA-sequencing assay was performed in cells under IH condition and normal conditions to find out the differentially expressed genes, which were further confirmed by reverse transcriptase polymerase chain reaction (RT-PCR) and Western blot assay.
As results, IH inhibited the proliferation of BV2 cells, as well as caused DNA damage. RNA-sequencing assay revealed 4 differentially expressed genes (p21, Cyclin D1, Cyclin E2, and Gadd45α) which were associated with the network of P53 signaling pathways in BV2 cells, among which, p21 and Gadd45α were dramatically increased while Cyclin D1 and Cyclin E2 were both decreased significantly. Moreover, inflammatory factors including IL-6, TNF-α and iNOS were significantly up-regulated in microglia cells under IH conditions for 8 hr.
Our results indicated that IH could inhibit cyclin D1 and cyclin E2 expression via initiating multiple P53 pathways, which further blocked cell cycle transition and attenuated proliferative capability of BV2 cells. Meanwhile, IH activated inflammation reactions in BV2 cells. Present study elaborate the effects of IH on biological functions of microglia and provide theoretical foundation for further study on new therapy methods for OSA.