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Shi T, Lao W, Ouyang K, Chen Y, Zhang Y, Luo J, Chen S. Laparoscopic pyeloplasty for newborns with severe hydronephrosis. Front Pediatr 2024; 12:1343211. [PMID: 38560400 PMCID: PMC10979644 DOI: 10.3389/fped.2024.1343211] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 03/04/2024] [Indexed: 04/04/2024] Open
Abstract
Aim We aimed to investigate the short-term efficacy and safety of laparoscopic pyeloplasty for treating newborns with severe hydronephrosis due to ureteropelvic junction obstruction (UPJO). Methods A retrospective analysis was performed on 16 newborn patients with severe neonatal hydronephrosis who underwent laparoscopic pyeloplasty at our hospital from January 2021 to November 2022. All patients were regularly followed up. Laparoscopic pyeloplasty with double J stent placement was performed after the presence of severe hydronephrosis was confirmed. Results Among the 16 pediatric patients (13 males, 3 females), the left side was affected in 13 cases and the right side in 3. The average age at surgery was 9.50 (8.50-12.00) days, with an average weight of 3.30 ± 0.95 kg. Laparoscopic pyeloplasty was performed in all cases without the need for open conversion. The mean surgery duration was 292.06 ± 73.60 min, with minimal blood loss (2.50, 2.00-5.00 ml). Postoperative hospital stays averaged 13.44 ± 4.70 days. No anastomotic leakage occurred, and follow-ups at 1, 3, 6, and 12 months showed no stent displacement, except for one case where the stent was removed at 1 month, and the others at 3 months. There were no cases of worsened hydronephrosis, except for one with renal atrophy at the 6-month follow-up. Changes in renal pelvis anteroposterior diameter exhibited a time effect (F = 49.281, P < 0.001), with significant differences at 1, 3, 6, and 12 months postoperatively compared to preoperative values (P < 0.05). Notably, differences were observed between 6 and 3 months, as well as between 12 and 3 months postoperatively (P < 0.05). Similarly, renal parenchymal thickness changes showed a time effect Pediatric urology, Guangdong Women and Children Hospital, Guangzhou, China (F = 49.281, P < 0.001), with significant differences at 1, 3, 6, and 12 months postoperatively compared to preoperative values (P < 0.05). Significant differences were also noted between 6 and 1 month, as well as between 12 and 1 month postoperatively (P < 0.05). There was one case of urinary tract infection after surgery, and no case of recurrence was observed. Conclusion Severe neonatal hydronephrosis must be treated promptly. Laparoscopic pyeloplasty is a safe and feasible treatment with minimal complications for newborn patients with severe hydronephrosis due to UPJO.
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Affiliation(s)
| | - Weihua Lao
- Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
| | | | - Yueqing Chen
- Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
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Pan M, Li Z, Xu J, Lei Y, Shu C, Lao W, Chen Y, Li X, Liao H, Luo Q, Li X. Release of Interface Confined Water Significantly Improves Dentin Bonding. J Dent Res 2023:220345231161006. [PMID: 37029657 DOI: 10.1177/00220345231161006] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2023] Open
Abstract
Water residue and replacement difficulty cause insufficient adhesive infiltration in demineralized dentin matrix (DDM), which produces a defective hybrid layer and thus a bonding durability problem, severely plaguing adhesive dentistry for decades. In this study, we propose that the unique properties of a highly hydrated interface of the porous DDM can give rise to 1 new type of interface, confined liquid water, which accounts for most of the residue water and may be the main cause of insufficient infiltration. To prove our hypothesis, 3 metal ions with increasing binding affinity and complex stability (Na+, Ca2+, and Cu2+) were introduced respectively to coordinate negatively charged groups such as -PO43-, -COO- abundant in the DDM interface. Strong chelation of Ca2+ and Cu2+ rapidly released the confined water, significantly improving penetration of hydrophobic adhesive monomers, while Na+ had little effect. A significant decrease of defects in the hybrid layer and a much decreased modulus gap between the hybrid layer and the adhesive layer greatly optimized the microstructure and micromechanical properties of the tooth-resin bonding interface, thus improving the effectiveness and durability of dentin bonding substantially. This study paves the way for a solution to the core scientific issue of contemporary adhesive dentistry: water residue and replacement in dentin bonding, both theoretically and practically.
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Affiliation(s)
- M Pan
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou, P. R. China
- Clinical Research Center for Oral Disease of Zhejiang Province, Hangzhou, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, P. R. China
| | - Z Li
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou, P. R. China
- Clinical Research Center for Oral Disease of Zhejiang Province, Hangzhou, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, P. R. China
| | - J Xu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou, P. R. China
- Clinical Research Center for Oral Disease of Zhejiang Province, Hangzhou, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, P. R. China
| | - Y Lei
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou, P. R. China
- Clinical Research Center for Oral Disease of Zhejiang Province, Hangzhou, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, P. R. China
| | - C Shu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou, P. R. China
- Clinical Research Center for Oral Disease of Zhejiang Province, Hangzhou, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, P. R. China
| | - W Lao
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou, P. R. China
- Clinical Research Center for Oral Disease of Zhejiang Province, Hangzhou, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, P. R. China
| | - Y Chen
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou, P. R. China
- Clinical Research Center for Oral Disease of Zhejiang Province, Hangzhou, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, P. R. China
| | - X Li
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou, P. R. China
- Clinical Research Center for Oral Disease of Zhejiang Province, Hangzhou, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, P. R. China
| | - H Liao
- Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Reconstruction, College of Stomatology, Guangxi Medical University, Guilin, P. R. China
| | - Q Luo
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou, P. R. China
- Clinical Research Center for Oral Disease of Zhejiang Province, Hangzhou, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, P. R. China
| | - X Li
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou, P. R. China
- Clinical Research Center for Oral Disease of Zhejiang Province, Hangzhou, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, P. R. China
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Bao Q, Ma W, Zhang X, Chen S, Luo J, Zhang G, Lao W, Chen Y. Outcome analysis of immediate and delayed laparoscopic pyeloplasty in infants with severe ureteropelvic junction obstruction. Front Pediatr 2022; 10:1022836. [PMID: 36340702 PMCID: PMC9627154 DOI: 10.3389/fped.2022.1022836] [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] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 09/20/2022] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVE The treatment timing of ureteropelvic junction obstruction (UPJO) in infants remains controversial. This study aimed to compare the recovery effect of renal morphology of immediate and delayed laparoscopic pyeloplasty in infants with severe UPJO. METHODS The infants with severe UPJO-induced hydronephrosis who underwent laparoscopic pyeloplasty according to their age at the time of surgery [the immediate treatment (IT) group: ≤1 month of birth, the delayed treatment (LT) group: 3-6 months of birth] in our center between 2010 and 2019 were enrolled in this study. Ultrasonography was used to assess renal morphology, including anteroposterior diameter (APD) of a pelvic, parenchymal thickness (PT), polar length (PL), and Society of Fetal Urology (SFU) grade. Preoperative and postoperative renal morphological outcomes at 6, 12, and 24 months were measured and compared. RESULTS During this period, a total of 135 patients were assigned to receive either IT (n = 73) or LT (n = 62) and were included for analysis. There were no significant differences in renal morphology indices at baseline between groups of IT and LT. The APD, PT, and PL in both groups all recovered to certain degrees compared with those at baseline, however, the IT group recovered more significantly than the LT group. Despite there being no significant difference in SFU grade between the two groups before and after surgery, the reduction of SFU grade in the IT group was more significant than that in the LT group during the 6-, 12- and 24-month follow-up periods. The PL, SFU, and APD were greater in the IT group than in the LT group at 6, 12, and 24 months of follow-up. At 6 months PL was not significantly higher between the two groups, while the outcome was significantly different at 12 months and 24 months. CONCLUSION Immediate laparoscopic pyeloplasty for the infant with severe ureteropelvic junction obstruction is effective, and it can accelerate the recovery of renal morphological indices in infants with severe UPJO-induced hydronephrosis.
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Affiliation(s)
- Qiao Bao
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
| | - Weijun Ma
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
| | - Xiewu Zhang
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
| | - Shuhan Chen
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
| | - Jiayao Luo
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
| | - Gang Zhang
- Department of Pediatric Surgery, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Weihua Lao
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
| | - Yueqing Chen
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
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Zhang X, Xie H, Luo M, Liang D, Lao W, Ma W, Lin Y. A systematic review and meta-analysis of long noncoding RNA linc-UBC1 expression and prognosis and clinicopathological phenotypes in human cancers. Artif Cells Nanomed Biotechnol 2021; 48:875-884. [PMID: 32460560 DOI: 10.1080/21691401.2020.1770776] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
According to previous studies, linc-UBC1 is abnormally expressed in various human tumours. Nonetheless, the clinical significance and mechanism of linc-UBC1 in cancer remains unclear. In our present analysis, we wanted to explore the specific role of linc-UBC1 in malignant tumours by integrating all of the relevant literature and subsequently elucidating the relationship between linc-UBC1 expression level and clinical characteristics of cancers. An elaborate database search of PubMed, Embase, Wanfang Data, Web of Science, Ovid, Medline, Cochrane Library and PMC was carried out up to 8 August 2019. We further applied the pooled odds ratio (OR) and hazard ratio (HR) to evaluate OS. After filtering by strict criteria, 11 studies containing 1017 cases were included in this analysis. Our results implied that high expression of linc-UBC1 was obviously related to poor OS in cancer (HR =1.735, 95% 1.348-2.235, p < .001 random effects model). Analogously, the data revealed that high expression of linc-UBC1 was highly correlated with lymph node metastasis (OR = 2.912, 95% CI: 2.056-4.125, p < .001 fix effects model) and high tumour stage (OR = 2.678, 95% CI: 1.859-3.857, p < .001 fix effects model). In summary, linc-UBC1 overexpression is associated with poor OS and advanced tumour stage and could be used as a novel prognostic biomarker in various cancers.
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Affiliation(s)
- Xiewu Zhang
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
| | - Haibiao Xie
- Department of Urology, Peking University First Hospital, Beijing, China
| | - Manjun Luo
- Department of Ultrasonic, Guangdong Provincial Hospital of Traditional Chinese Medicine, Guangzhou, China
| | - Daqiang Liang
- Department of Sports Medicine, The First Hospital Affiliated to Shenzhen University, Second People's Hospital, Shenzhen, China
| | - Weihua Lao
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
| | - Weijun Ma
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
| | - Yankun Lin
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
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Bao Q, Lao W, Shi T, Ouyang K, Ma S, Zhang W, Lin Y. Feasibility and Safety of a Simple Non-cystoscopic Double-J Tube Removal Technique in Children. Front Pediatr 2021; 9:761903. [PMID: 34805050 PMCID: PMC8600038 DOI: 10.3389/fped.2021.761903] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 10/06/2021] [Indexed: 11/30/2022] Open
Abstract
Objective: Double-J tube placement is an important procedure during upper urinary tract surgery. A primary drawback is the requirement of a second double-J tube removal under a cystoscope. Therefore, a simple and feasible alternative is required to remove the double-J tube without cystoscopy. The present study reported the feasibility and safety of a simple non-cystoscopic double-J tube removal technique. Method: We retrospectively analysed children who underwent pyeloplasty and ureterovesical reimplantation between June 2015 and August 2021. A simple device (a catheter with a suture) was used to pull out the double-J tube. Patient characteristics, detailed surgical procedures, success and complication rates and reasons for failure were evaluated. Result: A total of 613 children were included. The mean age of patients was 6.2 months (3 months-14 years). Non-endoscopic methods were used to remove the double-J tube in all except 6 patients (0.9%). Of the 6 patients who required ureteroscopy or cystoscopy, 4 had retraction of the double-J tube into the ureter, and 2 (0.6%) had bladder stones. Of the 613 patients, 479 (76.0%) required one attempt, 127 (20.1%) required two attempts and 19 (3.0%) required several attempts. No serious postoperative complications occurred in all patients. The most common complications were gross haematuria (22.5%), pain urinating (17.9%), difficulty in urinating (3.6%), foreskin injury (1.7%), and penile oedema (1.3%). No urethral strictures developed during the follow-up period. Conclusion: The study results demonstrated that the modified and simple non-cystoscopic double-J tube removal technique is a safe and an effective alternative to cystoscopy in clinical practise.
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Affiliation(s)
- Qiao Bao
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
| | - Weihua Lao
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
| | - Tong Shi
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
| | - Keyu Ouyang
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
| | - Sai Ma
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
| | - Wen Zhang
- Department of Pediatric Surgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Yankun Lin
- Department of Pediatric Urology, Guangdong Women and Children Hospital, Guangzhou, China
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Mehinto AC, VanDervort DR, Lao W, He G, Denison MS, Vliet SM, Volz DC, Mazor RD, Maruya KA. High throughput in vitro and in vivo screening of inland waters of Southern California. Environ Sci Process Impacts 2017; 19:1142-1149. [PMID: 28612856 DOI: 10.1039/c7em00170c] [Citation(s) in RCA: 4] [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: 06/07/2023]
Abstract
The impact of unmonitored contaminants, also known as contaminants of emerging concern (CECs), on freshwater streams remains largely uncharacterized. Water samples from 31 streams representing urban, agricultural and undeveloped (i.e., open space) land use in Southern California (USA) were analyzed for in vitro and in vivo bioactivity. The extent and magnitude of bioactivity screened using endocrine-responsive cell bioassays and a fish embryo screening assay were low. In contrast, a wider gradient of responses for the aryl hydrocarbon receptor (AhR) assay was observed, which was negatively correlated with a measure of benthic community structure. Both aromatic and non-aromatic CECs were tentatively identified in these samples, but polycyclic aromatic hydrocarbons (PAHs), known AhR agonists in urban environments, were not present at detectable levels. These results suggest that a combination of in vitro and in vivo show potential as screening techniques for biological condition in situ, but that more advanced, comprehensive analytical methods are needed to identify bioactive contaminants.
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Affiliation(s)
- A C Mehinto
- Southern California Coastal Water Research Project, Costa Mesa, CA, USA
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Lao W, Xu S, Cheng Y, Zhang X, Zhang J, Cheng G, Wang X. Transient expression of hepatitis B virus surface antigen (HBsAg) and human erythropoietin (hEPO) genes in milk after direct introduction into ewe. ACTA ACUST UNITED AC 2008; 41:465-72. [PMID: 18726227 DOI: 10.1007/bf02882883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/1997] [Revised: 01/12/1998] [Indexed: 10/22/2022]
Abstract
The ability to deliver nonviral DNA directly into animals would provide major practical and economic benefits. To pursue this potential, as a preliminary approach, the expression in mammary epithelial cells with nonviral DNA ending HBsAg and hEPO was investigated by in vivo delivery directly into mammary gland Either the bovine asl-casein-HBsAg or the WAE-hEPO gene construct was introduced into mammary glands of dm by mammary artery injection. A single injection of 10(11) copies of DNA construct was implemented for a doe. Transient expression of the constructs in milk collected from milk letdown by induction up to 19 d after injection was measured with an hEPO ELISA kit from Boehringer Mannheim (Cat. No. 1 693 417) for rhEPO, and a HBsAg-ELISA kit (Abbott Lab. USA) for rHBsAg. The treated animals showed mean concentration of recombinant molecules at 16 microg/L for rHBsAg, and 2 mg/L for rhEPO in milk.
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Affiliation(s)
- W Lao
- Institute of Developmental Biology, Chinese Academy of Sciences, Beijing, China
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Zou X, Chen Y, Wang Y, Luo J, Zhang Q, Zhang X, Yang Y, Ju H, Shen Y, Lao W, Xu S, Du M. Production of cloned goats from enucleated oocytes injected with cumulus cell nuclei or fused with cumulus cells. Cloning 2002; 3:31-7. [PMID: 11918840 DOI: 10.1089/152045501300189312] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study was designed to produce cloned goats from cumulus cells. Cloning donor nuclei were from cumulus cells either freshly isolated or cultured in vitro. Enucleated oocytes were either injected with cumulus cell nuclei without piezo-driven manipulator (injection method) or fused with cumulus cells (fusion method). The survival rate of cloned embryos, obtained by injection, was higher than that derived from fusion (62.7 and 45.9%, respectively). Two cloned goats were derived by fusion with in vitro cultured cumulus cells without starvation, but died shortly after natural birth, from respiratory difficulties. Their birth weights (2.23 kg and 2.03 kg) were within the normal range (2.0-2.7 kg) and postmortem analysis revealed no morphological abnormalities. The third cloned goat, derived by injection of nuclei from freshly isolated cumulus cells, weighed 3.3 kg at birth, and was 37% overweight compared with the average weight of the same species. This goat is healthy and well as this paper is being prepared. Nested PCR-RFLP analysis confirmed that all the cloned goats were derived from the donor cells.
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Affiliation(s)
- X Zou
- The Babraham Institute, Babraham, Cambridge, United Kingdom
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Lao W, Xu C, Ji S, You J, Ou Q. Electronic and vibrational spectra of a series of substituted carbazole derivatives. Spectrochim Acta A Mol Biomol Spectrosc 2000; 56A:2049-2060. [PMID: 11058049 DOI: 10.1016/s1386-1425(00)00261-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The FTIR and FTR spectra of halogen (Cl, Br, I) substituted carbazole and their N-acetic and propionic acids have been recorded. A number of lines have been assigned on the basis of previous studies on the parent compound and by comparisons with the characteristic vibrations of their constituent structural units as well as comparing the spectra from FTIR and FTR. Some substituent-sensitive bands and characteristic bands were found. The electronic absorption spectra of these compounds in acetonitrile were also measured and are briefly discussed.
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Affiliation(s)
- W Lao
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lan Zhou
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12
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Zhang J, Lao W, Cheng Y, Cheng G, Xu S. Expression of HBsAg gene in transgenic goats under direction of bovine alpha-S1 casein control sequence. Chin J Biotechnol 1997; 13:99-104. [PMID: 9343708] [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: 05/22/2023]
Abstract
An expressive construct combining hepatitis B surface antigen gene and bovine alpha-S1 casein control sequence (a 16-kb fragment), lambda 106, was made successfully using DNA recombination technology. The construct was then introduced into fertilized goat eggs with a transgenic technique. As the eggs developed into adults which, in turn, began to secrete milk after parturition, ELISA assay demonstrated HBsAg in the milk, thus showing successful expression of the construct in the mammary gland of the G0 transgenic goats and the secretion of the expression product into the milk.
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Affiliation(s)
- J Zhang
- Institute of Developmental Biology, Chinese Academy of Sciences, Beijing, China
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13
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Zhang Y, Wang H, Lao W, Zhou M, Wu Z, Liu H, Shi H. Analysis of Chinese isolates of Trichinella spiralis by molecular biotechnology. Chin Med J (Engl) 1996; 109:665-9. [PMID: 9275332] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVE To investigate the relationships among Trichinella spiralis isolates obtained from different hosts and geographical regions in China. MATERIALS AND METHODS Six isolates of Trichinella spiralis obtained from Changchun, Tianjin, Xi'an, Henan and Yunnan were detected. All the isolates were collected from pigs or dogs. Restriction fragment length polymorphism (RFLP), isoenzyme electrophoresis and soluble protein analysis were used. RESULTS Distinctive banding patterns in restriction maps were seen between Changchun and other isolates studied. A cloned specific repetitive DNA sequence (1.12 kb) from Changchun isolate was then selected to prepare probe for Southern blotting of DNA fragments. The hybridizing banding patterns among the isolates were different and only the Changchun isolate showed the 1.12 kb band. The Changchun isolate was also distinguishable from the other isolates in isoenzyme patterns of GP1, G6PD, HK, 6PGDH and AK, as well as in isoelectric focusing electrophoresis where the Changchun isolate presented a specific band at 4.1 P1. CONCLUSIONS There are at least two different biological types of Trichinella spiralis in China and the differences between them may be attributed to different geographical origins and/or different hosts.
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Affiliation(s)
- Y Zhang
- Beijing Tropical Medicine Research Institute
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14
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Wang H, Zhang Y, Lao W, Wu Z. Restriction fragment length polymorphism (RFLP) analysis of genomic DNA of 5 strains of Trichinella spiralis in China. Chin Med Sci J 1995; 10:131-5. [PMID: 8580480] [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: 01/31/2023]
Abstract
Five restriction endonucleases were used to digest genomic DNA from 5 isolates of Trichinella spiralis obtained from Changchun, Tianjin, Xian, Henan and Yunnan. All the isolates were secured from pigs except the Changchun strain which came from dog. The DNA fragments digested by endonuclease were separated by agarose gel electrophoresis. The Changchun isolate had a EcoRI band at 1.12kb and a DraI band at 1.97kb which were unique to this isolate. A cloned specific repetitive DNA sequence (1.12kb) from the Changchun strain was selected to prepare a probe for the Southern blotting of EcoRI restriction DNA fragments for the 5 isolates. The 1.12kb hybridizing band did not appear except in the Changchun isolate. These results seem to indicate that there are differences between the isolates obtained from hosts in different geographical regions.
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Affiliation(s)
- H Wang
- Beijing Tropical Medicine Research Institute
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15
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Chen R, Wang B, Zhang Y, Liu W, Zhang J, Lao W. Cloning, mapping, and sequencing of 3' and its flanking region of bovine alpha-s1 casein gene. Chin J Biotechnol 1992; 8:235-45. [PMID: 1343827] [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: 03/25/2023]
Abstract
A positive clone was isolated from a bovine genomic library in EMBL3 with the probe of alpha-s1 casein gene cDNA. The results from both restriction endonuclease digestion and Southern hybridization probed with the upstream and downstream fragments from the termination codon of bovine alpha-s1 casein gene cDNA suggested that the clone contained 3.5 kb downstream and 10.2 kb upstream fragments from the termination codon of alpha-s1 casein gene. Some divergences in restriction endonucleases sites, a few deletions, and many point mutations were found in introns and exons when compared with those which were published.
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Affiliation(s)
- R Chen
- Institute of Biophysics, CAS, Beijing, China
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16
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Chen S, Lao W, Ni Z, Shi L. Constructions of gene libraries of Rana nigromaculata and Mus musculus with cosmid pHC79. Sci Sin B 1982; 25:261-7. [PMID: 6285464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Gene libraries of Rana nigromaculata and Mus musculus (C57J6) have been constructed by the cosmid system developed by Collins using BamHl and Pstl as cloning restriction enzymes. A simplified formula, which is a modification of Clarke and Carbon derived from approximation, was used for calculating the number of colonies or recombinants necessary for the construction of a gene library. Pro+ and leu+ complementary to the recipient cells (HB101) with the genetic constitution of pro- and leu- have been selected from the BamH1 gene libraries of both Rana nigromaculata and the mouse in the present work.
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