Study on the propagation possibility in reared great sturgeon, Huso huso by GnRH synthetic hormone for production of fingerling

This study was carried out in the International Sturgeon Research Institute of Dr. Dadman during 2007–2011. A total of 24 beluga 7- year – old (Huso huso) including 8 males and 16 females were selected after morphological assay, biopsy and sexing based on histological routine methods and then stocked separately based on sex in 3 concrete circled ponds (with 4m diameter, 1.5 depth) an were fed by diet include 38–40 % protein, 13–15 % fat, 19.5 – 20 Mg/kg energy and 2-3 % different kind of vitamins and minerals produced by mentioned institute. Bleeding was carried out in order to separating serum for study on biochemical and hormonal parameters. The GnRH hormone was injected to fishes at two stages each 12 hours after GV detection, evaluation of sexual hormone levels and water temperature. Females were injected at two stages each 6 hours with ration 20% to 80 % and concentration of 10 µg/kg of fish body weight. Males were injected by GnRH for one time according with the second injection in females with concentration 20 µg/kg of fish body weight. Obtaining of eggs was carried out by micro incision of oviduct without killing fish. Mean concentration of Glucose showed no significance different at stages II and III, but showed significance different at stage IVof sexual maturation stages (P<0.05). Cholesterol, triglycerides and total lipid levels of males and females blood serum were changed significantly from stage II to stage IV and in different seasons (P<0.05). Calcium level of blood serum was different at various sexual maturity stages in males and females and was more in females than males at each stage. So that showed significant difference at stage III between them. Sodium ion showed no significant difference in males and females at each condition. Mean concentration of testosterone (T) in males and females at stages II, III and IV was 10.86 ± 1.63, 0.84 ± 0.12, 54.14 ± 3.1, 15.66 ± 2.18, 112.41 ± 7.4 and 50.75 ± 3.63 ng/ml respectively, that showed significant difference with each other and at different sexual maturity stages (P<0.05), that reached to a maxim in males at stage III and IV in Autumn and in females at stages II and III in Winter. But, at stage IV, it was similar to males. Testosterone levels at all stages in males was more than females. Mean concentration of progesterone level in males and females at stages II, III and IV was 0.5±0.01, 0.5±0.00, 0.5±0.08, 0.11±0.02, 0.36±0.04 and 0.19±0.03 ng/ml respectively, that showed significant difference at stage III. But showed similar results in males and females seasonally. Estradiol (E2) level in males and females at stages II, III and IV was 9±1.39, 5.45±0.29, 6.51±0.64, 9.47±0.97, 2.95±2.29 and 4.15±0.7 ng/ml, respectively that showed significant difference in males and females at different stages (P<0.05). Results showed that by good management and using endocrinology sciences (such as biochemical and hormonal indices), we can produce breeders with having good quality eggs and sperms for artificial propagation by using micro incision of oviduct method in order to without killing them (for several time breeding), caviar and farmed larvae and fry. Results also showed that Testosterone (T), Estradiol and Calcium were the most important detective indices for sexual maturity and the accurate time of synthetic hormone injection for artificial breeding. Testosterone (T) level limit in males and females for positive reply to artificial propagation was 90–120 and 40–60 ng/ml, respectively. By using the obtained results, we can reduce rearing cost of Huso huso, because the decrease of sexual maturity duration, increase of propagation recruitment, decrease of pressure to natural sources and help to restocking, commercializing of it for improvement of sturgeon rearing and propagation in order to caviar and fry production

Monitoring, isolation and identification of bacterial and parasitic agents in specific pathogen free shrimp production

Aquaculture is the fastest growing food industry in the world. Shrimp culture industry is also part of it, unfortunately, like other marine animal culture economic losses caused by the disease has been one of the major challenges of this industry. The major cause of mortality in shrimp hatcheries and rearing centers is related to water quality and the presence of pathogenic bacteria and parasites. These are common opportunistic microorganisms in the hatchery, rearing centers, flora and living food but poor conditions of culture are caused diseases. Since the development of aquaculture in the countries need health management, one of the important additional rings in the shrimp strategic plan is specific pathogen free shrimp production, which has been addressed in this plan. Specific pathogen free shrimp define as the shrimps which are free of the specific pathogens listed in world organization for animal health (OIE). These factors should be conclusively diagnosed and can be isolated from shrimp hatcheries and culture system. Therefore in this project screening and surveillance of shrimp in several generations according to the list of OIE were done and they were monitored for of bacterial pathogens (Necrosis Hepatopancreas Bacteria) and parasites (Microsporidian and Gregarines). At total 756 pieces of shrimp, 6 sample of dry food and 97 samples of live foods were controlled and tested. 1.35 percent of live foods were positive for NHPB and 5.6 percent of pre broodstocks have epicommensal and microsporidia which were disposed in quarantine phase. Because of biosecurity and surveillance system establishment, there were no bacterial or parasitic isolation or diagnosis during SPF shrimp production

Wnt signaling in triple-negative breast cancer

Wnt signaling regulates a variety of cellular processes, including cell fate, differentiation, proliferation and stem cell pluripotency. Aberrant Wnt signaling is a hallmark of many cancers. An aggressive subtype of breast cancer, known as triple-negative breast cancer (TNBC), demonstrates dysregulation in canonical and non-canonical Wnt signaling. In this review, we summarize regulators of canonical and non-canonical Wnt signaling, as well as Wnt signaling dysfunction that mediates the progression of TNBC. We review the complex molecular nature of TNBC and the emerging therapies that are currently under investigation for the treatment of this disease

The role of microRNAs in different types of thyroid carcinoma. A comprehensive analysis to find new miRNA supplementary therapies

The most common endocrine malignancy is thyroid cancer, and researchers have made a great deal of progress in deciphering its molecular mechanisms in the recent years. Many of molecular changes observed in thyroid cancer can be used as biomarkers for diagnosis, prognosis, and therapeutic targets for treatment. MicroRNAs (miRNAs) are important parts in biological and metabolic pathways such as regulation of developmental stages, signal transduction, cell maintenance, and differentiation. Therefore, their dysregulation can expose individuals to malignancies. It has been proved that miRNA expression is dysregulated in different types of tumors, like thyroid cancers, and can be the cause of tumor initiation and progression. In this paper, we have reviewed the available data on miRNA dysregulation in different thyroid tumors including papillary, follicular, anaplastic, and medullary thyroid carcinomas aiming to introduce the last updates in miRNAs-thyroid cancer relation

Network of three specific microRNAs influence type 2 diabetes through inducing insulin resistance in muscle cell lines

Insulin resistance has been implicated as one of the best predictors for type 2 diabetes. Growing evidence propose the involvement of microRNAs (miRNAs) as short regulatory molecules in modulating and inducing resistance. In this regard, we have investigated the role of three selected miRNAs in insulin resistance development (miR-135, miR-202, and miR-214), via assessing glucose uptake levels in C2C12 and L6 muscle cell lines. Interestingly, miRNA-transfected cells demonstrated a significantly different glucose uptake compared to the positive control cells. In addition, we evaluated the expression levels of three putative miRNA target genes (Rho-associated coiled-coil containing protein kinase 1, serine/threonine kinase 2, and vesicle-associated membrane protein 2) in transfected cells, recruiting luciferase assay. Our results indicated the targeting and downregulation of Rho-associated coiled-coil containing protein kinase 1 and serine/threonine kinase 2 genes in all miR-transfected cell lines (P � 0.05), but not for vesicle-associated membrane protein 2. MiRNA upregulation led to the poor stimulation of glucose uptake through insulin and developed insulin-resistant phenotype in both muscle cell lines. Our study showed the role of three miRNAs in the induction of insulin resistance in cell lines and making them prone to type 2 diabetes development. © 2018 Wiley Periodicals, Inc

Psychiatric disorders (Axis i and Axis II) and self-immolation: A case-control study from Iran

The objective of this study was to investigate preexisting psychiatric disorders in self-immolation patients. In a case-control study, 30 consecutive cases of deliberate self-inflicted burns, admitted to the regional burn center, were compared with 30 controls. Mental disorders were assessed via detailed clinical interview. Descriptive data revealed that 67 of self-immolation patients had adjustment disorder (all female), 10 drug and alcohol abuse/dependence (all male), 7 dysthymia, 3 major depression, 3 anorexia nervosa, 3 primary insomnia, 7 borderline personality disorder (50 male), 7 depressive personality disorder (100 female), and 3 antisocial personality disorder. In bivariate comparisons, adjustment disorders emerged as related to risk of self-immolation (odds ratio = 13.00). This study suggests that adjustment disorder is a risk factor for self-immolation. As a result, it has been suggested that increasing education about problem-solving approaches, and coping skills for females and at-risk groups are appropriate prevention programs and strategies in Iranian communities. © 2010 American Academy of Forensic Sciences

Multiplex RT-PCR assay for detection of Co-infection HIV-1 and HCV viruses in plasma samples

Background and Objective: HIV-1 and HCV infections especially in co-infected forms are among the most important infections transferred during blood transfusion.The screening of the blood products is valuable for preventing the transmission of infections. The aim of this study was to evaluate multiplex RT-PCR assay for detection of Co-infection HIV-1 and HCV Viruses in plasma samples. Materials and Methods: This laboratory study was done to evaluate the use of multiplex RT-PCR assay for simultaneous detection of HIV-1 and HCV genomes in plasma samples. The amplified genomes were detectable in 3% agarose gel base on difference in the numbers of nucleotides. The sensitivity and specificity of this assay was determined on healthy and infected subjects whome simultanously exhibit HIV-1 and HCV co-infection using plasma samples. Results: The specificity results showed that the primers used in this assay have no interaction with each other and other possible interfering agents. The clinical sensitivity and specificity of the assay has been considered as 90% and 100%, respectively. Conclusion: Multiplex RT-PCR can be used for screening of blood donors due to high sensivity and specificity

Frequency and antimicrobial susceptibility of Haemophilus influenzae type b isolated from children suspected to meningitis

Background: Haemophilus influenzae type b (Hib) has emerged as the predominant cause of meningitis in developing countries wherever it has been studied using good microbiologic procedures, but data regarding frequency, antimicrobial susceptibility and preferable method for detection of Haemophilus influenzae type b isolated from Iranian patients were scarce. Methods: One thousand and eight hundred suspicious CSF samples were received from Children Medical Center Hospital in Tehran, periodically. All samples were cultured on conventional and selective media for Haemophilus influenzae type b detection. PCR performed for samples were Hib negative in culture. The susceptibility of the isolates to different antimicrobial agents was determined using the disk diffusion method. Results: Overall, 6.7 (n= 121) of specimens had positive culture. 15.7 (n= 19) of isolates were diagnosed as Haemophilus influenzae type b with both culture and Antiserum test. PCR assay detected 10 isolates of H. influenzae type b in samples weren't detected in culture. H. influenzae type b isolates were resistance to ampicillin (42.1), chloramphenicol (36.8), and co-trimoxazole (52.6), respectively. The range of antimicrobial susceptibility to cephalosporins was from 52.6 for cephalothin to 57.8 for ceftriaxone, ceftazidime, cefixime and ceftizoxime. Multidrug resistances were observed in 31.5 of H. influenzae type b isolates. Conclusion: Although we found high frequency of resistance to the first line drugs for H. influenzae type b in Iran, but the frequency of this organism among children meningitis was lower than many Asian and European countries. PCR assay was more sensitive in detection of H. influenzae than culture method