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Wan ZY, Lin VCL, Hua YG. Pomc Plays an Important Role in Sexual Size Dimorphism in Tilapia. Mar Biotechnol (NY) 2021; 23:201-214. [PMID: 33580373 DOI: 10.1007/s10126-020-10015-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 12/27/2020] [Indexed: 06/12/2023]
Abstract
Sexual dimorphism is common across the animal kingdom. Knowledge of the mechanisms of sexual size dimorphism is limited although it is important in biology and aquaculture. Tilapia is the common name for ~ 100 species of cichlid fish. Some are important aquaculture species and males outgrow females. To gain novel insights into the mechanisms underlying sexual size dimorphism, we analyzed the differences of brain transcriptomes between males and females in Mozambique tilapia and studied the function of the pro-opiomelanocortin (Pomc) gene in tilapia and zebrafish. The transcriptome analysis identified 123, 55, and 2706 sex-biased genes at 5, 30, and 90 dph (days post-hatch), respectively, indicating sexual dimorphism of gene expressions in the brain. The expression of Pomc in the tilapia brain was a female-biased at 30, 90, and 120 dph. An analysis of the DNA sequence located upstream of the tilapia Pomc transcriptional start site identified two estrogenic response elements. In vitro luciferase assay of the two elements revealed that β-estradiol significantly enhanced the expression of luciferase activity, suggesting that the expression of Pomc is mediated by estrogen. We knocked out Pomc in zebrafish using Crispr/Cas-9. The Pomc-knockout zebrafish showed faster growth and higher sensitivity to feeding as compared to the wild-type fish. Taken together, our results indicate that Pomc contributes to sexual size dimorphism and suggest that the high estrogen level in females promotes the expression of Pomc and suppresses feeding in female tilapias, which leads to the slower growth of female tilapias.
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Affiliation(s)
- Z Y Wan
- Molecular Population Genetics and Breeding Group, Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, 117604, Singapore
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore
| | - V C L Lin
- Molecular Population Genetics and Breeding Group, Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, 117604, Singapore.
| | - Yue Gen Hua
- Molecular Population Genetics and Breeding Group, Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, 117604, Singapore.
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore.
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore, 117543, Singapore.
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Wu HF, Wang JP, Duan EG, Feng YF, Wan ZY, Wu YX, Lu YQ. Study on the preparation of granular alum sludge adsorbent for phosphorus removal. Water Sci Technol 2019; 79:2378-2386. [PMID: 31411592 DOI: 10.2166/wst.2019.241] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Alum sludge is the sludge discharged from a sedimentation tank in a drinking water treatment plant when polymerized with poly-aluminum chloride (PAC). In this paper, granular alum sludge adsorbent (GASA) was manufactured using powdery alum sludge (PAS) as the raw material and methods such as gluing and pore-forming. The effects of different binders, pore-forming agents, roasting temperatures, and roasting times on the formation of GASA and its dephosphorization performance were investigated. Results showed that the optimum binder was AlCl3 at a mass ratio of 8%, and the best pore-forming agent was starch at a 4% dosage ratio. Meanwhile, the optimum roasting temperature and time were 500 °C and 2 hours, respectively. The specific surface area of GASA was 23.124 m2/g. Scanning electron microscopy suggested that GASA's surface became rough, particles became tight, and average pore size increased, with additional pore channels. P adsorption by GASA reached 0.90 mg/g. The effluent phosphorus concentration of actual tail water decreased to 0.49 mg/L and the removal rate reached 73.5% when the GASA dosage was 20 g/L. The findings of this study are important for the further development of a low-cost adsorbent material for P removal in the future.
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Affiliation(s)
- H F Wu
- Department of Municipal Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China E-mail:
| | - J P Wang
- Department of Municipal Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China E-mail:
| | - E G Duan
- Department of Municipal Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China E-mail:
| | - Y F Feng
- Department of Municipal Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China E-mail:
| | - Z Y Wan
- Department of Municipal Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China E-mail:
| | - Y X Wu
- Department of Municipal Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China E-mail:
| | - Y Q Lu
- Department of Municipal Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China E-mail:
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Wu HF, Yue LZ, Jiang SL, Lu YQ, Wu YX, Wan ZY. Biodegradation of polyvinyl alcohol by different dominant degrading bacterial strains in a baffled anaerobic bioreactor. Water Sci Technol 2019; 79:2005-2012. [PMID: 31294717 DOI: 10.2166/wst.2019.202] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Polyvinyl alcohol (PVA) is the main pollutant in printing and dyeing wastewaters. This pollutant exhibits great demand, poor biodegradability and refractory degradation. In this study, PVA wastewater treatment experiments were conducted in a stably operating baffled anaerobic bioreactor (ABR) by using simulated PVA wastewater. The PVA degradation pathway and mechanism of the mixed dominant PVA-degrading bacterial strains were identified through the analysis of their degradation products. From the results, we inferred that PVA was degraded in a stepwise process under the synergistic action of different extracellular and intracellular enzymes produced by the mixed dominant PVA-degrading bacterial strains. In this process, PVA was first degraded into ketones, fatty acids and alcohols. It was then regenerated into acetic acid, hydrogen and carbon dioxide. Finally, these substances could be further utilized by methanogens. PVA was thus degraded completely. This study may serve as a reference for future works on the degradation of PVA in the ecological environment. It may also guide the sustainable development of PVA.
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Affiliation(s)
- H F Wu
- Department of Municipal Engineering, College of Urban Construction, Nanjing Tech University, Nanjing 211816, China E-mail:
| | - L Z Yue
- Department of Municipal Engineering, College of Urban Construction, Nanjing Tech University, Nanjing 211816, China E-mail:
| | - S L Jiang
- Department of Municipal Engineering, College of Urban Construction, Nanjing Tech University, Nanjing 211816, China E-mail:
| | - Y Q Lu
- Department of Municipal Engineering, College of Urban Construction, Nanjing Tech University, Nanjing 211816, China E-mail:
| | - Y X Wu
- Department of Municipal Engineering, College of Urban Construction, Nanjing Tech University, Nanjing 211816, China E-mail:
| | - Z Y Wan
- Department of Municipal Engineering, College of Urban Construction, Nanjing Tech University, Nanjing 211816, China E-mail:
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Lin G, Thevasagayam NM, Wan ZY, Ye BQ, Yue GH. Transcriptome Analysis Identified Genes for Growth and Omega-3/-6 Ratio in Saline Tilapia. Front Genet 2019; 10:244. [PMID: 30949199 PMCID: PMC6435965 DOI: 10.3389/fgene.2019.00244] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 08/30/2018] [Accepted: 03/05/2019] [Indexed: 12/30/2022] Open
Abstract
Growth and omega-3/-6 ratio are important traits in aquaculture. The mechanisms underlying quick growth and high omega-3/-6 ratio in fish are not fully understood. The consumption of the meat of tilapia suffers a bad reputation due to its low omega-3/-6 ratio. To facilitate the improvement of these traits and to understand more about the mechanisms underlying quick growth and high omega-3/-6 ratio, we conducted transcriptome analysis in the muscle and liver of fast- and slow-growing hybrid saline tilapia generated by crossing Mozambique tilapia and red tilapia. A transcriptome with an average length of 963 bp was generated by using 486.65 million clean 100 bp paired-end reads. A total of 42,699 annotated unique sequences with an average length of 3.4 kb were obtained. Differentially expressed genes (DEGs) in the muscle and liver were identified between fast- and slow-growing tilapia. Pathway analysis classified these genes into many pathways. Ten genes, including foxK1, sparc, smad3, usp38, crot, fadps, sqlea, cyp7b1, impa1, and gss, from the DEGs were located within QTL for growth and omega-3, which were previously detected content in tilapia, suggesting that these ten genes could be important candidate genes for growth and omega-3 fatty acid content. Analysis of SNPs in introns 1 and 2 of foxK1 revealed that the SNPs were significantly associated with growth and omega-3/-6 ratio. This study lays the groundwork for further investigation of the molecular mechanisms underlying the phenotypic variation of these two traits and provides SNPs for selecting these traits at fingerling stage.
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Affiliation(s)
- Grace Lin
- Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | | | - Z. Y. Wan
- Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - B. Q. Ye
- Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
| | - Gen Hua Yue
- Temasek Life Sciences Laboratory, National University of Singapore, Singapore, Singapore
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
- Department of Biological Sciences, National University of Singapore, Singapore, Singapore
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Liu BS, Wan ZY, Wang F, Zhan YP, Tian M, Cheung ASC. (18)O(2) label mechanism of sulfur generation and characterization in properties over mesoporous Sm-based sorbents for hot coal gas desulfurization. J Hazard Mater 2014; 267:229-237. [PMID: 24462892 DOI: 10.1016/j.jhazmat.2013.12.065] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 12/26/2013] [Accepted: 12/27/2013] [Indexed: 06/03/2023]
Abstract
Using a sol-gel method, SmMeOx/MCM-41 or SBA-15 (Me=Fe, Co and Zn) and corresponding unsupported sorbents were prepared. The desulfurization performance of these sorbents was evaluated over a fixed-bed reactor and the effects of reaction temperature, feed and sorbent composition on desulfurization performance were studied. Samarium-based sorbents used to remove H2S from hot coal gas were reported for the first time. The results of successive sulfidation/regeneration cycles revealed that SmFeO3/SBA-15 sorbent was suitable for desulfurization of hot coal gas in the chemical industry. The formation of elemental sulfur during both sulfidation and regeneration processes depended strongly on the catalytic action of Sm2O2S species, which was confirmed for the first time via high sensitive time of flight mass spectrometer (TOF-MS) using 6%vol(18)O2/Ar regeneration gas and can reduce markedly procedural complexity. The sorbents were characterized using N2-adsorption, high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), temperature-programmed reduction of H2 (H2-TPR), thermogravimetry (TG) and time-of-flight mass spectrometry (TOF-MS) techniques.
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Affiliation(s)
- B S Liu
- Department of Chemistry, School of Science, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China.
| | - Z Y Wan
- Department of Chemistry, School of Science, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - F Wang
- Department of Chemistry, School of Science, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Y P Zhan
- Department of Chemistry, School of Science, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - M Tian
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - A S C Cheung
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
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Zhang FM, Liu BS, Zhang Y, Guo YH, Wan ZY, Subhan F. Highly stable and regenerable Mn-based/SBA-15 sorbents for desulfurization of hot coal gas. J Hazard Mater 2012; 233-234:219-227. [PMID: 22835768 DOI: 10.1016/j.jhazmat.2012.07.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 07/03/2012] [Accepted: 07/05/2012] [Indexed: 06/01/2023]
Abstract
A series of mesoporous xCuyMn/SBA-15 sorbents with different Cu/Mn atomic ratios were prepared by wet impregnation method and their desulfurization performance in hot coal gas was investigated in a fixed-bed quartz reactor in the range of 700-850°C. The successive nine desulfurization-regeneration cycles at 800°C revealed that 1Cu9Mn/SBA-15 presented high performance with durable regeneration ability due to the high dispersion of Mn(2)O(3) particles incorporated with a certain amount of copper oxides. The breakthrough sulfur capacity of 1Cu9Mn/SBA-15 observed 800°C is 13.8 g S/100g sorbents, which is remarkably higher than these of 40 wt%LaFeO(3)/SBA-15 (4.8 g S/100g sorbents) and 50 wt%LaFe(2)O(x)/MCM-41 (5.58 g S/100g sorbents) used only at 500-550°C. This suggested that the loading of Mn(2)O(3) active species with high thermal stability to SBA-15 support significantly increased sulfur capacity at relatively higher sulfidation temperature. The fresh and used xCuyMn/SBA-15 sorbents were characterized by means of BET, XRD, XPS, XAES, TG/DSC and HRTEM techniques, confirmed that the structure of the sorbents remained intact before and after hot coal gas desulfurization.
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Affiliation(s)
- F M Zhang
- Department of Chemistry, Tianjin University, Tianjin, PR China
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Abstract
Medical Polyacrylamide Hydrogel (PAMG)has been used in plastic and aesthetic surgery for years. However, its safety is still in doubt in many countries. In the current research, first an approach, using high performance liquid chromatography (HPLC), to determine the amount of residual acrylamide monomer (AM) in the PAMG was presented. Then the cytotoxicity of PAMG was investigated using cell counting and methyl thiazolyl tetrazolium (MTT) assay. To explore the mechanism of this toxicity, normal human fibroblasts cultured in medium extracts were analyzed. Membrane changes and other related parameters were investigated using flow cytometry (FCM). Real time fluorescent polymerase chain reaction (real time PCR) was also introduced to determine the biological response of the fibroblasts. During this process, three representative genes (p53, beta-actin, and c-myc, which are tumor suppressor genes, housekeeping genes, and proto-oncogenes respectively) were selected for examination. Results indicated that a method based on HPLC is practical and simple for determining AM in PAMG. The detection limits can reach the desired ppb level, and so it can fully meet the requirements of the studies of PAMG. Polyacylamide Hydrogel inhibits the growth of human fibroblasts and may cause the apoptosis of human fibroblasts. Moreover, it can alter physical parameters such as the size and the granularity of these cells. Furthermore, these three genes have a relatively typical amplification plot and highly related, wide-range standard curves, and so this reaction system is definitely suitable for the semiquantification of these genes. PAMG induces the increase of the message ribonucleic acid (mRNA) expression of c-myc, while the p53 and beta-actin remain even. This change is not related to the concentration of AM in the gel and may be incited by other components in the extract of PMAG.
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Affiliation(s)
- T F Xi
- Center for Medical Devices, National Institute for the Control of Pharmaceutical and Biological Products, Beijing 100050, People's Republic of China.
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Jiang XQ, Jin KY, Chen TF, Li J, Liu JF, Wan ZY. [Treatment of nasofacial hemangioma with interventional embolization and pingyungmycin injection]. Lin Chuang Er Bi Yan Hou Ke Za Zhi 2000; 14:114-5. [PMID: 12541411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To investigate a new method with interventional embolization and pingyugmycin injection for treating nasofacial Hemangioma. METHOD The fillets and coil were used for interventional embolization facial artery, internal maxillary artery, temporal superficial artery, and pingyungmycin injected for 4 patients. RESULT The tumor and vascular beat in this series of 4 patients were disappeared by follow up of one year. There are not nasal obstruction and epistaxis. CONCLUSION Treatment with interventional embolization and pingyungmycin injection is a safe and effective method for nasofacial hemangioma.
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Affiliation(s)
- X Q Jiang
- Department of Otorhinolaryngology, Second Affiliated Hospital, Hubei Medical University, Wuhan 430071
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Ge YP, Chen ZQ, Yeh HJ, Chu TH, Wan ZY, Li WY, Chen RM. [Induction of phenotypic changes and effect of AFP gene expression in newborn rat liver cells with N-methyl-N-nitro-N-nitrosoguanidine and 3'-methyl-4-dimethylaminoazobenzene in vitro]. Shi Yan Sheng Wu Xue Bao 1986; 19:193-201. [PMID: 2437745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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