This study was designed to examine the effect of the intrauterine infusion of platelet-rich plasma (PRP) or equine lyophilized growth factor (L-GF^equina) on the follicular growth, endometrial thickness, estrus cycle length, and pregnancy rate in purebred Arabian mares. A total of 73 purebred Arabian mares who experienced repeat breeding for three successive cycles were randomly divided into the following three groups: control group, without treatment; second Group (PRP group), in which mares were intrauterine infused with 20 mL of fresh PRP on the second day after the end of physic estrus phase; and the third group (L-GF^equina Group), consisting of mares that were intrauterine infused with 20 mL of reconstituted lyophilized horse platelets growth factors (L-GF^equina) on the second day after the estrus phase. The results showed no significant difference between control and treated groups in the diameter of the preovulatory follicles during the post treatment cycle. The endometrium thickness increased significantly in the L-GF^equina and PRP groups ahead of the non-treated group. Intrauterine L-GF^equina or PRP administration shortened the estrus cycle length. A higher pregnancy rate was recorded in the L-GF^equina and PRP treated mares. In conclusion, the intrauterine infusion of L-GF^equina or PRP increased the endometrial thickness and pregnancy rate and could be used to improve fertility in Arabian purebred mares who experienced from repeat breeding.

The information from this study should be useful for genetic characterization and for developing conservation programs of this important species

This study quantifies the effects of extruded linseed and soybean (ELS) dietary supplementation on milk yield, composition, and fatty acid profiles, as well as first-service conception rate in Holstein dairy cows. Seventy-eight open Holstein dairy cows were divided into two groups: (1) a control, which received a basal diet; and (2) a test group, which received a basal diet supplemented with the ELS (650 g/kg of extruded linseed and 150 g/kg of extruded soybean) at a rate of 100 g/kg. In the ELS group, milk yield per day and solid not fat (SNF) yield increased by 3.26% and 0.88%, respectively, in relation to the control. Percentage milk fat decreased significantly by 1.4% in the ELS group when compared with the control. The ELS supplement resulted in a decrease in saturated fatty acids (SFAs) and an increase in monounsaturated (MUFAs) and polyunsaturated fatty acids (PUFAs) in milk. In conclusion, the supplementation of dairy cow feed with 100 g/kg of ELS increases milk yield and milk unsaturated fatty acids (especially MUFAs and PUFAs). ELS supplementation also causes a decrease in percentage fat and SFA levels but does not affect the first-service conception rate or the incidence rate of mastitis.

This study was constructed to investigate the differences between three breeds of rabbits [New Zealand White (NZW), Rex and Egyptian Gabali (Al-Gabali)] under heat stress regarding growth traits, hematological, biochemical and immunological parameters, oxidative stress biomarkers as well as metabolic hormones. Thirty rabbits of each breed (4 weeks of age) were subjected to heat stress (32 ± 1°C, 70-80% relative humidity) in the summer season at the period from mid-July to the end of August 2019. Blood samples were collected at 10th week of age. The results revealed that body weights of NZW and Rex were higher by 205 and 145 g, respectively than those of Al-Gabali as well as average daily gains of NZW and Rex were higher by 4.42 and 3.40 g/day, respectively compared with Al-Gabali (P <0.05). Average daily feed intake of Rex was lower by 7.65 g/day than those of NZW and 2.89 g/day compared with Al-Gabali (P <0.05) and they had the lowest feed to gain ratios (3.58±0.097). Aspartate aminotransferase, urea and creatinine were significantly lowered in the plasma of Al-Gabali compared with NZW and Rex whereas, Al-Gabali recorded higher total proteins (5.90±0.048 g/dL), total globulins (2.50±0.054 g/dL), antibody titer against sheep red blood cells (6.38±0.111) and superoxide dismutase (7.42±0.163 IU/L) than NZW (5.66±0.069 g/dL, 2.21±0.084 g/dL, 4.90±0.068 and 6.80±0.053 IU/L, respectively) and Rex (5.74±0.072 g/dL 2.25±0.095 g/dL, 4.25±0.095 and 6.88±0.050 IU/L, respectively). Al-Gabali bunnies had higher immunoglobulin G, immunoglobulin A, catalase and glutathione peroxidase than NZW and Rex. However, Al-Gabali recorded the lowest insulin (15.64±0.20 ng/mL), growth hormone (45.80±0.48 ng/mL) and triiodothyronine (136.20±2.15 ng/mL). In conclusion, Al-Gabali rabbits were better adapted to heat stress compared with NZW and Rex, which was reflected in the improvement of health, immunity and oxidative stress indicators as well as lower plasma metabolic hormones, but they didn't have the genetic potential for growth traits.

In the present study, a phytochemical of Ficus sycomorus (Moraceae family) was screened, and the effect of this extract on rabbit performance indices, immunity, and carcass quality measures was determined. Ficus sycomorus samples were collected, air-dried, and extracted with 70% methanol to prepare a solution of 100 mg/mL concentration. The extract was subjected to high-resolution mass spectrometric measurements via ultra-high performance liquid chromatography-quadrupole time-of-flight-nanospray mass spectrometry (UPLC-QToF-MS) and 1H NMR analysis. Forty-eight male rabbits, one-month-old, belonging to the Blanc de Bouscat and New Zealand White breeds were selected and distributed equally in a 2 × 3 factorial trial. The rabbits within each breed received F. sycomorus extract at the dose of 0, 100, and 200 mg/kg for 60 days. Blood samples were collected and serum obtained for the detection of liver enzymes, serum lipids, and proteins. The results of UPLC-QToF-MS and molecular networking analysis revealed the presence of procyanidin B2, procyanidin A1, genistein, eriodyctiol, catechin, luteolin, biochanin A, and chlorogenic acid that might exhibit various pharmaceutical activities. However, the F. sycomorus extract reduced rabbit performance indices and carcass quality measures. In addition, this extract significantly depressed the low-density lipoprotein and triglycerides, which may indicate the antidyslipidemia effect of this extract on rabbits.