جستجوی مقالات مرتبط با کلیدواژه « هورمون های استروئیدی » در نشریات گروه « زیست شناسی »

Studies suggest that haloperidol has anti-psychotic effects through the inhibition of dopamine receptors in the nervous system. Morus alba L. leaf extract is also known as an herbal medicine with dopamine blocking effect similar to haloperidol. The aim of this study is to compare the effect of haloperidol and Morus alba L. leaf extract on steroid hormones and ovarian tissue ultrastructure in adult Trichogaster trichopterus fish.

120 pieces of Trichogaster trichopterus adult female fish were obtained from the ornamental fish breeding workshop in Qazvin, and after preparing the aquariums, they were divided into 8 intact control groups and solvent control groups, and three groups of doses of 0.05, 0.1, and 2. 0 mg/kg of haloperidol drug and three groups of doses of 50, 100, 200 mg/kg of Morus alba L. leaf ethanol extract. Injections were done 10 times and every other day in a period of 20 days in the amount of 0.02 ml in the muscle between the dorsal fin and the lateral line of the fish. At the end of euthanasia of the fish, gonadosomatic index, steroid hormones and the ultrastructure of ovarian tissue were investigated in the treatment and control groups.

Haloperidol drug in all doses caused a significant decrease in gonadosomatic index, 17-beta estradiol and 17-hydroxyprogesterone hormones (P<0.05) and had no significant effect on testosterone hormone (P>0.05). While white mulberry leaf extract increased gonadosomatic index and steroid hormones (P<0.05).

By increasing the dose of haloperidol, the level of gonadosomatic index and beta-estradiol decreased, but these effects were not dose-dependent. Also, the administration of , Morus alba L leaf ethanolic extract showed a less harmful effect on the level of sex hormones and gonadosomatic index than haloperidol. Nevertheless, it seems that the dose of 50-200 mg/kg is not sufficient and appropriate dose to observe the sexual effects of mulberry leaf plant and it is better to prescribe higher doses so that the dose-dependent effects can be observed better by increasing the concentration of flavonoids.

Due to use of ovulin hormone in the carp breeding centers and lack enough information about the effect of its different concentrations on this fish broodstocks, evaluation of the effectiveness of ovulin hormone in artificial reproduction of carp is essential. This study was performed on 12 male broodstocks of carp with an average weight of 1307.85±169.57g. Fish in 4 groups (each group with 4 fish) were injected at doses of 0.2, 0.25, 0.3 and 0.35mg/kg body weight of ovulin hormone in one time. The injection method was performed peritoneally and below the pectoral fin. Blood samples were taken from fish in two times, before injection and 10 hours after injection. Based on the results, it was found that injection of different doses of ovulin hormone had no effect on red blood cell counts (RBC), mean corpuscular hemoglobin (MCH) and white blood cell counts (WBC) (P>0.05). However, the amount of hemoglobin, hematocrit and granulocytes in all treatments decreased in the blood of male broodstock after the injection of ovulin hormone and the percentage of monocytes increased (P <0.05). It had no effect on total protein and sodium (P>0.05). However, glucose and calcium levels increased and triglyceride, albumin and potassium levels decreased in the studied doses (P<0.05). The levels of cortisol and sex hormones testosterone, estradiol and progesterone in male broodstocks increased in all doses studied (P<0.05). Also, the highest sperm motility and spermatocrit were observed in 0.2 mg/kg, pH in 0.3 mg/kg, triglyceride and alkaline phosphatase in 0.35mg/kg and calcium, sodium and potassium in 0.25mg/kg (P<0.05). The results of this study showed that doses of 0.25 and 0.3mg/kg body weight had the best effect on blood indices, steroid hormones and sperm indices in male broodstocks of carp.

It seems that vitamin A has a role in improving the reproductive performance of bird. The aim of this study was to investigate the dietary effect of five levels of 0, 4000, 8000, 16000 and 32000 IU/kg of vitamin A on ages of embryonic mortality, levels of steroidal hormones and reproductive organs of male and female Japanese quail. 320 adult Japanese quails were used in randomized complete block design with 5 treatments, 4 replicates and 16 birds per replicate with 12 of females and 4 males for 42 days. During experiment, birds had free access to water and feed and the lighting schedule or photoperiod was 16 hours of light. The embryonic death stage was not affected by treatments. In male quail, weight percentage of right testis was affected by experimental treatments. Weight percentage of right testis in the treatment containing 8000 IU/kg of vitamin was lower and the highest percentage was belong to 16000 IU/kg of vitamin A (P

Beluga sturgeon(Huso huso) is one of the most valuable species of sturgeon for breeding and rearing in aquaculture farms. Understanding the quality of gonads, especially gonads in female, is essential to the success of breeding and reproducing. The purpose of this study was to investigate the differences in body size (length and weight) and steroid hormones based on the echogenicity (volume and color) observed from gonad in ultrasound on 4-year-old female beluga sturgeon (n=20)

For this purpose, the fish were bio-assayed and blood analyzed. The SonoAce R3 was used for ultrasound by adjusting the frequency between 8-9 Hz, hormonal assay was performed by radioimmunoassay (RIA).

Mean total weight (TW), total length (TL), standard length (SL), condition factor (CF) of fish were 9.96 kg, 114.45 cm, 101.65 cm, 0.93 and mean of E2, T and 17,20OH-P were 0.49, 0.28 and 41.7 ng/ml, respectively. The results of one-way ANOVA showed that there was no significant difference between the mean of morphometric parameters in different gonadal colors in sonographic observations (p> 0.05). However, there was a significant difference between their mean values with respect to different gonad volumes in the ultrasound observations (p<0.05) whereas fish with a higher average of total weight, total length, standard length, and condition factor showed good gonad volume in the ultrasound observations. There was also no significant difference between mean values of steroid hormones in terms of volume and color of gonad (p> 0.05).

Since the larger fish had a favorable gonad volume in the ultrasound observations, thus, separation and maintenance of such stocks for reproduction is more desired and reduces costs. Also steroid hormones in 4-year-old female beluga are not associated with gonadal echogenicity characteristics and cannot be used as a determination method.