Hormone Molecular Biology and Clinical Investigation最新文献

On November 24th, 2021 a case of a new viral variant of SARS-CoV-2 was reported by South Africa and Botswana to WHO, which later was designated as the variant of concern on 26th November 2021. It has around 60 mutations (50 non synonymous, 8 synonymous, and 2 non coding) as compared to the original parent strain of Wuhan. Different hypotheses have been put forward as an explanation for the origin like reverse zoonosis i.e. animal to human transmission, origin from an immune compromised patient or use of highly mutagenic drug like molnupiravir as treatment. A huge spike in cases around the globe is suggestive of a high rate of infectivity and transmissivity as compared to the previous known variants. With whatever cases have been documented so far, it is said that omicron causes mostly mild clinical illnesses and there is a less chance of hospitalization according to the clinicians. Among the reported cases, there were already vaccinated patients also. So there is a possibility that omicron might be able to evade the vaccine induced immunity due to a huge number of mutations (especially in the spike protein sequences). Until new vaccines specific to the pathogen are being developed, the coverage of the currently acceptable vaccines should be increased so that none is deprived of the mandatory doses and a third booster dose might help to reduce the chances of serious complications of this new strain beforehand. So an equal focus on the host and environment is required along with the pathogen.

Objectives: MicroRNA expression disruptions play an important function in the expansion of gastric cancer. Previous investigation has indicated that miR-372-5p doing as an oncogene in several malignancies. CDX1 and CDX2, as target genes of miR-372-5p, play the role of tumor suppressors and oncogenes in gastric cancer cells, respectively. The current investigation explored the effects of miR-372-5p regulation on CDX2 and CDX1 in AGS cell lines and studied their molecular mechanism.

Methods: hsa-miR-372-5p miRCURY LNA miRNA Inhibitors and Mimic were transfected into AGS cell line. The cell viability and cell cycle calculation were defined by MTT assay and flow cytometry, respectively. The Expression levels of miR-372-5p, CDX1, CDX2 and transfection efficiency were measured using Real-time PCR. Statistical investigation p values <0.05 were considered to be meaningful.

Results: miR-372-5p particularly was upregulated in control cells and also after transfection by mimic. While its expression was reduced by the inhibitor. Upregulation of miR-372-5p remarkably increased cell growth and led to accumulation in the G2/M phase, although the inhibitor decreased cell growth and accumulation in the S phase. Accordingly, upregulation of miR-372-5p increased CDX2 and decreased CDX1 expression. By inhibition of miR-372-5p, expression of CDX2 was decreased and expression of CDX1 was increased.

Conclusions: Up and down-regulation of miR-372-5P has a potential effect on the expression levels of its target genes, CDX1 and CDX22. Accordingly, the downregulation of miR-372-5p may be assumed as a possible therapeutic target in treating gastric cancer.

Objectives: Type 2 diabetes (T2D) is known to be associated with chronic inflammation, but the inflammatory regulators/markers are not exactly defined and the link between them remains undetermined. The objective of this study is to identify these markers by testing traditional (IL6 & IL8) and non-traditional (TREM1 & uPAR) inflammatory markers.

Methods: Data and blood samples were obtained from 114 T2D and 74 non-diabetic Kuwaiti subjects attending health facilities in Kuwait. Chemical analyzers were used to measure glycemic and lipid profiles, while ELISA was used to measure plasma levels of insulin and several inflammatory markers.

Results: Showed that the IL-6 and TREM1 were significantly higher in T2D compared to non-diabetic controls, and the uPAR level was borderline higher in T2D but significantly correlated with IL-6 levels. Unexpectedly, IL8 was significantly below normal in T2D and IL6/IL8 ratio was significantly higher in T2D patients. Unlike other tested markers, uPAR was in addition strongly correlated with insulin levels and HOMA-IR index.

Conclusions: Raised levels of IL6, TREMI, IL6/IL8 ratio, and the strong positive correlation of plasma levels of uPAR with IL-6, insulin, and HOMA-IR index, are reliable spectators of chronic inflammation in T2D patients. The reduced level of IL-8 in T2D was a peculiar observation that needs further explanation. Finally, the consequences and impact of the sustained rise of these inflammatory regulators in diabetic tissues need to be meticulously explored.

Objectives: Metabolic syndrome (MetS) may cause premature development of some diseases. PON1 genes may be involved in the pathogenesis of MetS. The aim of study was to evaluate the association between Q192R and L55M gene polymorphisms and its enzyme activity with the MetS components in subjects with and without MetS.

Methods: Polymerase Chain Reaction and Restriction Fragment Length Polymorphism analysis were performed to determine polymorphisms of the paraoxonase1 gene in subjects with and without metabolic syndrome. Biochemical parameters were measured by spectrophotometer.

Results: The MM, LM, and LL genotype frequencies of the PON1 L55M polymorphism were 10.5, 43.4, and 46.1%, and 22.4, 46.6, and 31% and; the QQ, QR, and RR genotype frequencies of the PON1 Q192R polymorphism were 55.4, 38.6 and 6%; and 56.5, 34.8 and 8.7% in subjects with and without MetS, respectively. The L and M allele frequencies were 68 and 53%; and 32 and 47% for PON1 L55M in subjects with and without MetS, respectively. The Q and R allele frequencies for PON1 Q192R were 74 and 26% in both groups. There were significant differences in HDL-cholesterol level and PON1 activity in the genotypes QQ, QR, and RR of the PON1 Q192R polymorphism in subjects with MetS.

Conclusions: The PON1 Q192R genotypes had only effected on PON1 activity and HDL-cholesterol level in subjects with MetS. Different genotypes of the PON1 Q192R seem to be important candidates to make the subjects susceptible to MetS in the Fars ethnic group.

DNA methylation is the most important epigenetic element that activates the inhibition of gene transcription and is included in the pathogenesis of all types of malignancies. Remarkably, the effectors of DNA methylation are DNMTs (DNA methyltransferases) that catalyze de novo or keep methylation of hemimethylated DNA after the DNA replication process. DNA methylation structures in cancer are altered, with three procedures by which DNA methylation helps cancer development which are including direct mutagenesis, hypomethylation of the cancer genome, and also focal hypermethylation of the promoters of TSGs (tumor suppressor genes). Conspicuously, DNA methylation, nucleosome remodeling, RNA-mediated targeting, and histone modification balance modulate many biological activities that are essential and indispensable to the genesis of cancer and also can impact many epigenetic changes including DNA methylation and histone modifications as well as adjusting of non-coding miRNAs expression in prevention and treatment of many cancers. Epigenetics points to heritable modifications in gene expression that do not comprise alterations in the DNA sequence. The nucleosome is the basic unit of chromatin, consisting of 147 base pairs (bp) of DNA bound around a histone octamer comprised of one H3/H4 tetramer and two H2A/H2B dimers. DNA methylation is preferentially distributed over nucleosome regions and is less increased over flanking nucleosome-depleted DNA, implying a connection between nucleosome positioning and DNA methylation. In carcinogenesis, aberrations in the epigenome may also include in the progression of drug resistance. In this report, we report the rudimentary notes behind these epigenetic signaling pathways and emphasize the proofs recommending that their misregulation can conclude in cancer. These findings in conjunction with the promising preclinical and clinical consequences observed with epigenetic drugs against chromatin regulators, confirm the important role of epigenetics in cancer therapy.

Objectives: This study aims to investigate the population status of selenium in Colombia and other associated factors.

Methods: Cross-sectional study, in population of urban or rural origin (n=412). Main outcome measures were: median serum selenium, thyrotropin, the prevalence of and positivity of anti-thyroid peroxidase, anti-thyroglobulin, and anti-TSH receptor.

Results: This study found that 96.6% of the subjects had normal selenium levels, and no significant associations were found between the population median of selenium and overweight/obesity, sociodemographic variables, age, goiter, and thyroid antibody positivity.

Conclusions: In Colombia, the population status of selenium is normal, and the geological characteristics may contribute to the state of selenium in this population. However, additional studies are required to evaluate the content of selenium in plants and other foods.

Objectives: The present study aims to investigate the effects of resistance training on sex hormones and sperm parameters in male rats under X-ray.

Methods: In this experimental study, 24 Sprague Dawley rats (200-250 g) were randomly assigned into four groups: healthy control, irradiated control, healthy training and irradiated training. Irradiation was induced at a dose of 4 Gy on the whole body. The resistance training protocol was performed for 10 weeks. Finally, blood serum was used to assess FSH, LH and testosterone and sperm quality. Data were analyzed using ANOVA and Tukey's post hoc test.

Results: The results showed that radiation significantly reduced serum levels of LH (p=0.42), FSH (p=0.001) and testosterone (p=0.28) between radiation control and healthy control groups. Also, no significant difference was observed between serum levels of LH (p=0.135) and testosterone (p=0.419) in radiation resistance training and the healthy control groups. In addition, significant differences were observed between radiation resistance training and radiation control groups in sperm parameters such as sperm count (p=0.02) and progressively motile sperm (p=0.031).

Conclusions: It seems that short-term resistance training can improve sperm parameters, including sperm count and sperm motility through increasing serum levels testosterone and LH in male rat under X-ray.

Objectives: This study was conducted to evaluate the efficacy of rectal progesterone suppositories on pregnancy outcomes of pregnant women diagnosed with PPROM at the gestational age of 26-34 weeks, as well as on maternal and neonatal outcomes.

Methods: This is a double-blind, randomized clinical trial in pregnant women with PROM with gestational age of 26-24 weeks, conducted between February 2020 and December 2020 in Sayyad Shirazi Hospital, Gorgan, Iran.

Results: According to the results of the present study; Rectal progesterone suppository in pregnant women with PPROM is associated with improved delivery outcomes such as neonatal APGAR score, increased latent delivery stage without complications or severe and dangerous complications, without increased risk of mortality and NICU hospitalization in infants, so prescribing suppository rectal progesterone in pregnant women with PPROM with a gestational age of 26 to 34 weeks is associated with positive outcomes and is recommended based on the findings and opinions of the researchers.

Conclusions: According to the results of the present study; Rectal progesterone suppository in pregnant women with PPROM is associated with improved delivery outcomes such as neonatal APGAR score, increased latent delivery stage without complications or severe and dangerous complications, without increased risk of mortality and NICU hospitalization in infants, so prescribing suppository rectal progesterone in pregnant women with PPROM with a gestational age of 26 to 34 weeks is associated with positive outcomes and is recommended based on the findings and opinions of the researchers.

Objectives: This study aimed to evaluate the level of adrenocorticotropic hormone (ACTH) and adrenal insufficiency in patients with mucocutaneous pemphigus lesions who use oral corticosteroids.

Methods: This descriptive-analytical study was performed on 54 patients (48.44 ± 12.74 years) with mucocutaneous pemphigus in 2019. Those patients taken corticosteroids in different doses and way. At first, collected patients information including age, sex, type of pemphigus, duration of use, patient dosage, duration of corticosteroid administration, and method of administration were collected daily. Adrenal gland function was measured by evaluating ACTH levels. Data were analyzed by using Pearson correlation coefficient and t-test.

Results: Our study showed that 37 cases (68.5%) had normal ACTH average hormone level (7.3-63.3 mL/pg), 11 cases (20.4%) were lower levels (<7.2 mL/pg), and 6 cases (11.1%) were higher levels (63.3 > mL/pg). Wo observed no significant relationship between ACTH and duration of corticosteroids usage (p=0.207).

Conclusions: Taking a maintenance dose of between 12.5 and 25 mg daily does not usually lead to adrenal insufficiency. The present study showed that the lower the daily dose of corticosteroids, the lower the likelihood of adrenal insufficiency.