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Chen R, Guo RH, Lei MM, Zhu HX, Yan LY, Shi ZD. Research Note: Development of a sandwich ELISA for determining plasma growth hormone concentrations in goose. Poult Sci 2021; 101:101631. [PMID: 34986448 PMCID: PMC8743213 DOI: 10.1016/j.psj.2021.101631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/27/2021] [Accepted: 11/25/2021] [Indexed: 12/02/2022] Open
Abstract
Growth hormone (GH) is required for normal postnatal development in poultry; however, no immunoassay exists to assess its levels in geese plasma, hindering the study of endocrine regulation in this species. We developed a sandwich ELISA to determine the GH concentrations in the plasma of geese. Recombinant goose GH was produced using a eukaryotic expression system and purified for use as the reference standard in ELISA and the antigen for producing the polyclonal antibodies in rabbits. Rabbit anti-goose GH polyclonal antibody was used to coat the wells of the ELISA plate, and its biotinylated form served as the detection antibody. An avidin-conjugated horseradish peroxidase was used to bind the detection antibody and catalyze the chromogenic reaction of 3,3,5,5-tetramethylbenzidine and H2O2. A sigmoidal curve was fitted to the optical density and the log of the standard GH concentration using the four-parameter logistic model. The sensitivity of the assay was less than 0.156 ng/mL. The intra- and interassay coefficients of variation were less than 9 and 13%, respectively. The response curve of the serially diluted plasma samples from geese exhibited a good parallel relationship with that observed for the reference standards. The assay effectively detected differences in GH concentrations in plasma samples from geese at various physiological stages; thus, it will be useful for future study of their growth and metabolism.
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Affiliation(s)
- R Chen
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - R H Guo
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - M M Lei
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - H X Zhu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - L Y Yan
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Z D Shi
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China.
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Liu J, Ma XH, Yan LY, Liu M, Wang SS, He Y. [Association between dyslipidemia and carotid plaque incidence in a research group: a prospective cohort study]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 40:341-345. [PMID: 30884615 DOI: 10.3760/cma.j.issn.0254-6450.2019.03.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To assess the association and intensity of baseline dyslipidemia with the incidence of carotid plaque in a researchers group in China. Methods: A total of 716 researchers were enrolled in this prospective cohort study. Dyslipidemia was assessed in 2010. Follow-up study on carotid plaque was conducted in 2017. Results: Over 8 years' follow-up, 289 carotid plaque patients were identified among 716 individuals who did not have carotid plaque at baseline survey, with cumulative incidence of 40.36%. After adjustment of age, gender, BMI, waist circumference, FPG, SBP, DBP, ALT and uric acid, compared with non-dyslipidemia group, HR of carotid plaque for such populations with ≥3 types of dyslipidemia was 1.681 (95%CI: 1.090--2.593). Conclusions: Dyslipidemia might be associated with higher risk of carotid plaque, and population with ≥3 types of dyslipidemia had higher risk for carotid plaque. Prevention of dyslipidemia or reduction of types of dyslipidemia might be one of the effective precautions for prevention of carotid plaque.
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Affiliation(s)
- J Liu
- Physical Examination Center, The Fourth Medical Center of People's Liberation Army General Hospital, Beijing 100037, China
| | - X H Ma
- Physical Examination Center, The Fourth Medical Center of People's Liberation Army General Hospital, Beijing 100037, China
| | - L Y Yan
- Physical Examination Center, The Fourth Medical Center of People's Liberation Army General Hospital, Beijing 100037, China
| | - M Liu
- Institute of Geriatrics, Chinese People's Liberation Army General Hospital, Beijing 100853, China; Beijing Key Laboratory of Research on Aging and Related Diseases, Chinese People's Liberation Army General Hospital, Beijing 100853, China; State Key Laboratory of Kidney Disease, Chinese People's Liberation Army General Hospital, Beijing 100853, China; National Clinical Research Center for Geriatrics Diseases, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - S S Wang
- Institute of Geriatrics, Chinese People's Liberation Army General Hospital, Beijing 100853, China; Beijing Key Laboratory of Research on Aging and Related Diseases, Chinese People's Liberation Army General Hospital, Beijing 100853, China; State Key Laboratory of Kidney Disease, Chinese People's Liberation Army General Hospital, Beijing 100853, China; National Clinical Research Center for Geriatrics Diseases, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Y He
- Institute of Geriatrics, Chinese People's Liberation Army General Hospital, Beijing 100853, China; Beijing Key Laboratory of Research on Aging and Related Diseases, Chinese People's Liberation Army General Hospital, Beijing 100853, China; State Key Laboratory of Kidney Disease, Chinese People's Liberation Army General Hospital, Beijing 100853, China; National Clinical Research Center for Geriatrics Diseases, Chinese People's Liberation Army General Hospital, Beijing 100853, China
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Abstract
In this study, we examined the specialized features of the outer hair cells (OHCs) and the stereocilium bundles of the bat cochlear fovea. Bat cochlea hair cells were observed by scanning and transmission electron microscopy, and the auditory brainstem response thresholds were assessed. The stereocilia bundles of the OHCs were extremely short. The OHC bodies were flask-shaped and cambiform or ball-shape in the cochlear fovea. Digitations in the Deiters cells had exaggerated lengths, and cup formation of the Deiters cell, housed at the bottom of the OHC in the base of the cell, showed a specialized shape. Our results provide the first evidence that different shapes of the OHCs in the cochlea fovea are related to the high-frequency function of auditory response. Echolocating bats have cochlear morphologies that differ from those of non-echolocating animals. Bat cochlear foveae are specialized for analyzing the Doppler-shifted echoes of the first-harmonics of the CF2 component; these are overrepresented in the frequency range around the dominant harmonic of the echolocation calls of bats. However, the OHCs of the bat cochlear fovea have not been fully characterized.
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Affiliation(s)
- S Q Zhang
- Department of Otolaryngology, The First Affiliated Hospital, Medicine School of Xi'an Jiaotong University, Xi'an, China
| | - S L Li
- Center for Research Laboratory, The Second Affiliated Hospital, Medicine School of Xi'an Jiaotong University, Xi'an, China
| | - H L Zhu
- Center for Research Laboratory, The Second Affiliated Hospital, Medicine School of Xi'an Jiaotong University, Xi'an, China
| | - L Y Yan
- Department of Otolaryngology, The First Affiliated Hospital, Medicine School of Xi'an Jiaotong University, Xi'an, China
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Lu CL, Yan J, Zhi X, Xia X, Wang TR, Yan LY, Yu Y, Ding T, Gao JM, Li R, Qiao J. Basic fibroblast growth factor promotes macaque follicle development in vitro. Reproduction 2015; 149:425-33. [DOI: 10.1530/rep-14-0557] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Fertility preservation is an important type of frontier scientific research in the field of reproductive health. The culture of ovarian cortices to i) initiate primordial follicle growth and ii) procure developing follicles for later oocyte maturation is a promising fertility preservation strategy, especially for older women or cancer patients. At present, this goal remains largely unsubstantiated in primates because of the difficulty in attaining relatively large follicles via ovarian cortex culture. To overcome this hurdle, we cultured macaque monkey ovarian cortices with FSH, kit ligand (KL), basic fibroblast growth factor (bFGF), and/or epidermal growth factor (EGF). The various factors and factor combinations promoted primordial follicle development to different extents. Notably, both bFF (bFGF, 100 ng/ml and FSH, 50 ng/ml) and KF (KL, 100 ng/ml and FSH, 50 ng/ml) contributed to the activation of primordial follicles at day 12 (D12) of culture, whereas at D18, the proportions of developing follicles were significantly higher in the bFF and KF groups relative to the other treatment groups, particularly in the bFF group. Estradiol and progesterone production were also highest in the bFF group, and primary follicle diameters were the largest. Up until D24, the bFF group still exhibited the highest proportion of developing follicles. In conclusion, the bFGF–FSH combination promotes nonhuman primate primordial follicle developmentin vitro, with the optimal experimental window within 18 days. These results provide evidence for the future success of human ovarian cortex culture and the eventual acquisition of mature human follicles or oocytes for fertility restoration.
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Yan LY, Kang YP, Lei Y, Huang JQ, Wan LY, Liao BS. First Report of Sclerotinia sclerotiorum Causing Sclerotinia Blight on Peanut (Arachis hypogaea) in Northeastern China. Plant Dis 2014; 98:156. [PMID: 30708607 DOI: 10.1094/pdis-05-13-0476-pdn] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Peanut, Arachis hypogaea L., is an important source of vegetable oil and protein in China with a planting area of 5 million ha and annual production of 16.2 million metric tons. In September of 2012, typical symptoms of Sclerotinia blight were first observed on peanut in Shuangcheng, Heilongjiang Province, China. Approximately 50% of the plants in a field were infected. Symptoms began as a chlorotic wilt on the foliage and developed into necrosis of basal stems and developed very quickly in the field. In advanced stages of the disease, stems and branches became bleached and eventually died. White, fluffy mycelium and black irregular sclerotia (3.5 to 5.4 mm diameter) were observed on the infected stems. Infected branches and pegs were shredded, and most pods dropped on the soil during harvest. To isolate the causal agent of the disease, sclerotia were collected from the field. Twenty sclerotia were surface disinfected in 1% NaOCl for 3 min, rinsed three times with sterile water, placed on potato sucrose agar (PSA) with 100 μg/ml streptomycin, and then incubated at 22°C in the dark for 10 days. Fungal DNA was extracted from mycelia with a TIANGEN DNAsecure Plant Kit (Beijing) and amplified by PCR with the universal fungal primer ITS1 and ITS4. PCR products of five replicates were sequenced and subjected to an NCBI BLAST search. The BLAST search revealed that our sequences (GenBank Accession No. KC935388) had 100% identity with reported sequences of Sclerotinia sclerotiorum. The isolates were identified as S. sclerotiorum (Lib.) de Bary based on mycelia, sclerotia, and rDNA sequence analysis. To conduct pathogenicity tests, nine potted peanut plants (1 month old) were each inoculated with a 5-mm-diameter disk of colonized PSA by placing the inoculum on the base of the stem. Plants were inoculated with a plug of non-colonized PSA as controls. All inoculated plants were covered with a plastic bag for 5 days to maintain high humidity and incubated at 22 to 24°C in the growth chamber with a 12-h photoperiod. After 2 days, the inoculated plants showed water-soaked brown symptoms on the stem base and whole plants wilted after 5 days under high moisture conditions. The symptoms were identical to those observed on peanut plants in Shuangcheng, Heilongjiang Province, whereas the control plants remained symptom-free. Re-isolation of the fungus from the inoculated plants confirmed that the causal agent was S. sclerotiorum. S. sclerotiorum has been reported on peanut in the United States and Argentina (1,2,3). To our knowledge, this is the first report of S. sclerotiorum as a pathogen causing Sclerotinia blight on peanut in northeastern China. References: (1) A. Marinelli et al. Int. J. Pest Manage. 44:251, 1998. (2) J. E. Woodward et al. Plant Dis. 90:111, 2006. (3) J. E. Woodward et al. Plant Dis. 92:1468, 2008.
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Affiliation(s)
- L Y Yan
- Oil Crops Research Institute (OCRI) of Chinese Academy of Agricultural Sciences (CAAS)/Key Lab of Oil Crop Biology of the Ministry of Agriculture, Hubei, Wuhan 430062, China
| | - Y P Kang
- Oil Crops Research Institute (OCRI) of Chinese Academy of Agricultural Sciences (CAAS)/Key Lab of Oil Crop Biology of the Ministry of Agriculture, Hubei, Wuhan 430062, China
| | - Y Lei
- Oil Crops Research Institute (OCRI) of Chinese Academy of Agricultural Sciences (CAAS)/Key Lab of Oil Crop Biology of the Ministry of Agriculture, Hubei, Wuhan 430062, China
| | - J Q Huang
- Oil Crops Research Institute (OCRI) of Chinese Academy of Agricultural Sciences (CAAS)/Key Lab of Oil Crop Biology of the Ministry of Agriculture, Hubei, Wuhan 430062, China
| | - L Y Wan
- Oil Crops Research Institute (OCRI) of Chinese Academy of Agricultural Sciences (CAAS)/Key Lab of Oil Crop Biology of the Ministry of Agriculture, Hubei, Wuhan 430062, China
| | - B S Liao
- Oil Crops Research Institute (OCRI) of Chinese Academy of Agricultural Sciences (CAAS)/Key Lab of Oil Crop Biology of the Ministry of Agriculture, Hubei, Wuhan 430062, China
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Chen JH, Zhang XG, Jiang YT, Yan LY, Tang L, Yin YW, Cheng DS, Chen J, Wang M. Bioactivity and pharmacokinetics of two human serum albumin-thymosin alpha1-fusion proteins, rHSA-Talpha1 and rHSA-L-Talpha1, expressed in recombinant Pichia pastoris. Cancer Immunol Immunother 2010; 59:1335-45. [PMID: 20473755 PMCID: PMC11030058 DOI: 10.1007/s00262-010-0862-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2010] [Accepted: 04/26/2010] [Indexed: 12/22/2022]
Abstract
Thymosin-alpha1 (Talpha1) is indicated for the treatment of certain viral infections, including hepatitis B and C, and cancers, such as melanoma. In this paper, the fusion genes encoding human serum albumin (HSA) and Talpha1 with (rHSA-L-Talpha1) and without a linker peptide (rHSA-Talpha1) were constructed and overexpressed in P. pastoris. Through the process of ion interaction chromatography (Q-Sepharose F.F), hydrophobic interaction chromatography (Phenyl Sepharose HP) and affinity chromatography (Blue Sepharose F.F), the purity of fusion proteins was greater than 97%. In contrast to the reactivity of normal spleen cells to Con A, the data of in vitro murine spleen lymphocytes proliferation experiment suggested that spleen cells achieved a higher degree of T cell maturation after rHSA-L-Talpha1, rHSA-Talpha1 and Talpha1 treatments, respectively. Moreover, rHSA-L-Talpha1, rHSA-Talpha1 and Talpha1 can also antagonize dexamethasone-induced apoptosis of thymocyte sub-populations. In hydrocortisone-induced immunosuppression mice (in vivo experiments), after subcutaneous injections with two fusion proteins and Talpha1 for seven consecutive days, the net increment of body weight, the spleen index and the thymus index were significantly improved. Simultaneously, the increase in SOD level and the decrease in MDA level in plasma were observed. The pharmacokinetic data of rHSA-L-Talpha1 and rHSA-Talpha1 administered in rats showed an improved pharmacokinetic profile with a conspicuous prolonged half life. The analysis of bioactivity and pharmacokinetics suggested that fusion proteins rHSA-L-Talpha1 and rHSA-Talpha1 were new drug candidates.
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Affiliation(s)
- Jian-Hua Chen
- College of Life Science and Technology, China Pharmaceutical University, Nanjing, People's Republic of China.
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Yan LY, Xu ZY, Goldbach R, Kunrong C, Prins M. Nucleotide sequence analyses of genomic RNAs of Peanut stunt virus Mi, the type strain representative of a novel PSV subgroup from China. Arch Virol 2005; 150:1203-11. [PMID: 15747049 DOI: 10.1007/s00705-005-0492-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2004] [Accepted: 01/04/2005] [Indexed: 10/25/2022]
Abstract
The complete nucleotide sequence of Peanut stunt virus strain Mi (PSV-Mi) from China was determined and compared to other viruses of the genus Cucumovirus. The tripartite genome of PSV-Mi encoded five open reading frames (ORFs) typical of cucumoviruses. Distance analyses of four ORFs indicated that PSV-Mi differed sufficiently in nucleotide sequence from other PSV strains of subgroups I and II to warrant establishment of a third subgroup of PSV.
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Affiliation(s)
- L Y Yan
- Ministry Key Laboratory of Genetic Improvement for Oil Crops, Oil Crop Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, PR China
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