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Simple Summary: Tibetan yellow cattle and dzo are important meat sources for people living on the Tibetan Plateau. As a hybrid offspring of Tibetan yellow cattle and yaks, dzo inherit the advantages of their parent generations. However, the differences in the blood metabolites and ecological adaptability of Tibetan yellow cattle and dzo remain unclear. In this study, we have explored the potential difference in environmental adaptability between these two breeds of animals by analyzing their blood-based physiological and biochemical parameters, serum metabolites, and fecal microorganisms. The results revealed that dzo showed better adaptation to the high-altitude and low-temperature environment of the Tibetan Plateau, as compared to Tibetan yellow cattle. This study provides a basis for understanding the adaptive mechanism of dzo in the Qinghai–Tibet Plateau. This study aimed to investigate the differences in environmental adaptability between dzo and Tibetan yellow cattle by using corresponding assay kits to analyze blood indices, utilizing mass spectrometry for blood metabolite profiling, and performing 16S rDNA sequencing of fecal microbiota. Forty female cattle were randomly divided into a dzomo (female dzo) group (MG, n = 20) and a Tibetan-yellow-cattle group (HG, n = 20). After 150 days of uniform feeding, six cattle from each group were randomly picked for jugular blood sampling and collection of fecal microorganisms. The results showed that the serum albumin, creatinine, total protein, superoxide dismutase, IgG, and IgM concentrations in the MG group were higher (p < 0.05), whereas the serum triglyceride concentration was lower, compared to the HG group (p < 0.05). The higher level of phospholipids containing long-chain polyunsaturated fatty acids (PUFAs) (PC (18:5e/2:0), PC (20:5e/2:0), LPC 18:2, LPC 20:5) observed in the serum of the dzo suggests that they have an advantage in adapting to the challenging conditions of the plateau environment. The fecal microbiota analysis showed that Akkermansia was significantly enriched in the MG group; this might be the key bacterial genus leading to the strong adaptability of dzo. Our findings indicated the dzo's superior adaptation to the Tibetan Plateau's harsh environment. [ABSTRACT FROM AUTHOR]

Simple Summary: The lungs are key organs in mammals that shows adaptive changes in response to high altitude, and yaks (Bos grunniens) have adapted their lungs well to the hypoxic environment of Tibetan Plateau after a long period of evolution and natural selection. However, the long-term life of lowland cattle on the plateau can cause symptoms such as pulmonary arterial hypertension, wherein the abnormal proliferation of pulmonary vascular smooth muscle cells leads to the remodeling of the pulmonary vasculature, which is the main cause of pulmonary arterial hypertension. The underlying molecular mechanisms of lung adaptation to hypoxia in yaks remain largely unknown. In this study, we constructed stably transfected yak cell lines overexpressing PDK1 via lentiviral transfection, and we cultured yellow cattle and yak PASMCs, as well as PDK1-OEcon/OE, under normoxia and 10% O2 to explore the effects of hypoxia on the PDK1 and TGF-β/Smad signaling pathways in yak PASMCs. This will provide theoretical data at the cellular and molecular levels, along with basic information to further elucidate the mechanism of the PDK1-mediated TGF-β/Smad signaling pathway in yak PASMCs induced by hypoxia. The aim of this study was to investigate the effects of hypoxia-induced phenotype, glucose metabolism, ROS levels, and the PDK1-mediated regulation of TGF-β/Smad signaling in yellow cattles, yaks, and those overexpressing PDK1 PASMCs using growth curves, flow cytometry, scratch experiments, glucose and lactic acid assays, RT-qPCR, and Western blotting. The results showed that hypoxia significantly promoted proliferation, migration, antiapoptosis, ROS levels, glucose consumption, and lactate production in yellow cattle PASMCs (p < 0.05), and the cells were dedifferentiated from the contractile phenotype; conversely, hypoxia had no significant effect on yak PASMCs (p > 0.05). PDK1 overexpression significantly promoted proliferation, antiapoptosis, glucose consumption, and lactate production in yak PASMCs under normoxia and hypoxia (p < 0.05), decreased their migration levels under hypoxia (p < 0.05), and dedifferentiated the contractile phenotype of the cells. Overexpression of PDK1 in yak PASMCs is detrimental to their adaptation to hypoxic environments. Yak PASMCs adapted to the effects of hypoxia on lung tissue by downregulating the expression of genes related to the PDK1 and TGF-β/Smad signaling pathways. Taken together, the regulation of PDK1-mediated TGF-β/Smad signaling may be involved in the process of yaks' adaptation to the hypoxic environment of the plateau, reflecting the good adaptive ability of yaks. The present study provides basic information to further elucidate the mechanism of PDK1-mediated TGF-β/Smad signaling induced by hypoxia in the lungs of yaks, as well as target genes for the treatment of plateau diseases in humans and animals. [ABSTRACT FROM AUTHOR]

Objective： This study aimed to study the preservation effect of ozone water sterilization combined with chitosan coating on cold fresh yellow cattle. Methods： Three groups were set up as follows: control group A (pure water treatment), experimental group B used 2% chitosan coating on cold fresh yellow cattle, and experimental group C used ozone water sterilization combined with 2% chitosan coating on cold fresh yellow cattle. The effect of ozone sterilization combined with chitosan coating on the preservation of cold fresh yellow cattle was examined using sensory score, chromaticity (L* and a* values), hanging loss rate, TVB-N and total bacterial count. Results： The concentration of ozone water for sterilization was 1.0 mg/L, and the flushing time was 20s. During the same storage period, the sensory and L* values of cold fresh yellow cattle in Group C were significantly higher than those in Group A and Group B (P＜0.05), the hanging loss rate, TVB-N and total viable count were significantly lower than those in Group A and Group B (P＜0.05). The a* value of Group C yellow cattle was significantly lower than those in Group A and Group B (P＜0.05) in the early storage period, but the decline rate in the late storage period was significantly lower than that in Group A and Group B (P＜0.05). Compared with the control group A and experimental group B, the shelf life of group C was extended by 12 days and 4 days, respectively. Conclusion： Ozone sterilization and chitosan coating technology played a synergistic role in the preservation of cold fresh yellow cattle, which can effectively extend its preservation and storage period.

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The purpose of this study was to compare between the histochemical characteristics and the expression of epidermal growth factor (EGF) and it's receptor (EGFR) in the submandibular gland (SMG) of adult yaks and yellow cattle. The SMG tissues of yaks and yellow cattles were collected for histochemical, immunohistochemical (IHC), immunofluorescence (F‐IHC)，real‐time quantitative polymerasechain reaction (RT‐qPCR) and Western blotting methods. The results showed that the striated ducts of SMG were highly developed and connected to the intercalated ducts, which were shorter and directly connected to the acini. Compared with yellow cattle, yak SMG contains more mucous acini. Immunofluorescence showed significant expression of EGF and its receptor in both striated and intercalated ducts of these two species of cattle. Statistical analysis divulged that the distribution density of EGF and EGFR in the SMG of the yak was both significantly higher than that in yellow cattle (p < 0.05). Furthermore, the mRNA expression of EGF and EGFR in yak SMG was also higher than that in yellow cattle. The above results indicated that the intercalated ducts and striated ducts are the main expression sites of EGF and EGFR, the acidic mucin and EGF secreted from SMG of yak were more than that from yellow cattle. The results of this study provide powerful data for the study of physiological functions of submaxillary gland in ruminants and also provide important clues for the study of adaptive physiological mechanisms in plateau organisms. [ABSTRACT FROM AUTHOR]

ObjectiveTo determine the prevalence of ticks parasitic on domestic animals in Yiwu City of Zhejiang Province.MethodsWe monitored， identified and analyzed ticks parasitic on domestic animals in Yiwu in 2021.ResultsA total of 452 domestic animals were monitored， of which 306 were infected with ticks， suggesting a prevalence of 67.70%. A total of 2，603 ticks were captured， and the tick index was determined to be 5.76. The ticks were identified to belong to one family， four genera， and 10 species. Haemaphysalis longicornis was the dominant tick （59.16%）， followed by Rhipicephalus haemaphysaloides （26.32%） and Rhipicephalus microplus （6.45%）. Prevalence of ticks， tick index， and number of tick species were listed for domestic animals as follows： goats （74.37%， 7.45， 7 species）， yellow cattle （62.50%， 4.14，6 species）， and dogs （54.62%， 2.59， 8 species）. Moreover， goat was the main domestic animal infected with more than two tick species （25.99%）； H.longicornis （91.26%） was the species with most repated infections. The dominant species of ticks were H.longicornis （65.15%） and R.haemaphysaloides （29.42%） in goats， R.microplus （67.67%） and R.haemaphysaloides （20.69%） in yellow cattle， and H.longicornis （57.14%） and Haemaphysalis porcupines （21.10%） in dogs. However， seasonal fluctuation in tick index differed among goats， yellow cattle and dogs. The fluctuation in tick index in goats and dogs was consistent with that of H.longicornis， with a major peak in March and the minor peaks in September and October. The fluctuation in tick index in yellow cattle was consistent with that of R.microplus， with two peaks in April and August-September. In addition， larval ticks， nymphal ticks and adult ticks were caught in this study， among which nymphal ticks were most common. We found that single domestic animals were infected with ticks of the same species and different stages， which was more common in goats and those animals infected with H.longicornis.ConclusionTicks parasitic on domestic animals are common in Yiwu. Multiple species of ticks have been identified， with H.longicornis as the dominant species. It warrants further monitoring and countermeasures.

Copyright of Journal of the Chinese Society of Animal Science is the property of Chinese Society of Animal Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study was conducted to examine the influence of uni and bilateral castration on growth performance and lipid metabolism in yellow cattle. Eighteen 9-month-old healthy yellow cattle (average body weight 184.03 ± 4.09 kg) were selected and divided into three groups: The uncastrated cattle (C), half castrated cattle (HC) and full castrated cattle (FC). The results showed that the growth rate of FC group was significantly reduced as compared to HC and C group, while the feed to gain ratio exhibited an opposite trend. The concentrations of triglycerides (TG), low-density lipoprotein cholesterol (LDL) and high-density lipoprotein (HDL) were increased significantly in FC group from day 60 to the end of the trial compared to HC and control groups. Serum testosterone concentration of FC group cattle was decreased from day 60 to 120 d of the trial compared to HC and control groups. The concentration of the lauric acid in FC cattle was significantly increased from the HC and control groups. In the FC group, the acetyl-CoA carboxylase alpha (ACACA), ACC and fatty acid synthase (FAS) gene expression levels were significantly higher compared to control and HC groups. Our results of this study suggest that bilateral castration increased the lipid metabolism and fatty acid composition compared to unilateral castrated and un-castrated cattle. Bilateral castration alters the growth performance in yellow cattle. Bilateral castration alters hormones levels and lipid metabolites levels in serum. Bilateral castration improves the lipid metabolism and fatty acid profile. [ABSTRACT FROM AUTHOR]

Objective: To investigate the prevalence and genetic variation of Theileria in yellow cattle in Xiangxi Autonomous Prefecture of Hunan Province., Methods: A total of 184 blood specimens were collected from Fenghuang, Huanyuan and Baojing counties of Xiangxi Autonomous Prefecture during the period from August 2018 through August 2019, and were detect using PCR assay with the specific 18S ribosomal rRNA ( 18S rRNA ) gene targeting Theileria . The gene sequences of positive specimens were aligned with the sequences recorded in GenBank, and a phylogenetic tree was created with Plasmodium ovale 18S rRNA as an outgroup., Results: A total of 143 blood samples were positive for Theileria , with a mean detection rate of 77.7%. Theileria was prevalent in the blood samples from yellow cattle in all three counties, with detection rates of 85.0% in Fenghuang County, 88.3% in Huayuan County and 61.0% in Baojing County, respectively. There was no significant difference in the detection rate of Theileria between Xiangxi yellow cattle and normal yellow cattle (77.2% vs. 79.5%; χ 2 = 0.08, P was significantly lower in the housed yellow cattle than in free-range cattle (68.9% vs. 89.7%; Theileria was significantly lower in the housed yellow cattle than in free-range cattle (68.9% vs. 89.7%; χ 2 = 22.36, P < 0.01). A total of 18 PCR positive samples were randomly selected for sequencing and analysis, and all samples showed more than 99.0% homology with T. luwenshuni isolates. Phylogenetic analysis showed that the 18 positive samples were clustered into the same branch with T. luwenshuni , but were far away from other isolates., Conclusions: The prevalence of Theileria is high in yellow cattle from Xiangxi Autonomous Prefecture of Hunan Province, and T. luwenshuni may be the dominant parasite species.