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He QF, Pan GB, Yu ZF, Yao WX, Zhu LL, Luo CF, Guo XS. Novel Rim Plating Technique for Treatment of the Inferior Pole Fracture of the Patella. Orthop Surg 2021; 13:651-658. [PMID: 33619908 PMCID: PMC7957411 DOI: 10.1111/os.12876] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 10/11/2020] [Accepted: 10/25/2020] [Indexed: 11/29/2022] Open
Abstract
To aim of the present paper was to introduce a novel fixation technique for the treatment of inferior pole fracture of the patella. We performed a prospective observational study of consecutive cases of inferior pole fracture of the patella that were treated at our institution between January 2018 and June 2019. The patients include three men and one woman, with an average age of 47 years (range: 42–59 years). All patients were treated with the novel rim plating fixation technique for preserving the inferior pole of the patella. During the surgery, a 2.4 mm straight locking compression plate was contoured to adapt to the arc of the lower half of the patella as the rim plate. After reduction of the fracture, the rim plate was fixed to the proximal fragment of the patella through multiple locking screws, against the continuous pull of the patellar tendon. The rim plate encircles and constricts the inferior pole fragments, functioning as a compression and blocking construct. If necessary, an additional anterior tension band or mini locking plate can be used to further prevent anterior displacement of the inferior pole fragments. Under this rigid fixation, motion of the knee and full weight‐bearing were encouraged postoperatively. The patients were followed up monthly until 12 months after surgery. The time to achieve 90°pain‐free, full range of motion of the knee, and fracture healing, were recorded. Related complications were monitored, including infection, loss of reduction, fixation failure, anterior knee pain, and soft‐tissue irritation. The modified Cincinnati knee rating system was used for knee function assessment. The average operative time was 58.8 min (range: 52–63 min). The average blood loss was 59.8 mL (range: 45–71 mL). For all patients, pain‐free 90° range of motion was restored in 2–4 weeks, and the full range of motion was restored in 8–11 weeks. All patients achieved bone union in 6–9 weeks with no displacement of the fragments or breakage of the implant. No patient complained of anterior knee pain or soft‐tissue irritation. The modified Cincinnati score at 12‐month follow up demonstrated excellent outcomes in all four patients. The rim plating technique may be a feasible option for the treatment of the inferior pole fracture of the patella.
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Affiliation(s)
- Qi-Fang He
- Department of Orthopaedic Surgery, Affiliated Hangzhou First People's Hospital Zhejiang University School of Medicine, Hangzhou, China
| | - Guo-Biao Pan
- Department of Orthopaedic Surgery, Hangzhou Cancer Hospital, Hangzhou, China
| | - Ze-Feng Yu
- Department of Orthopaedic Surgery, Affiliated Hangzhou First People's Hospital Zhejiang University School of Medicine, Hangzhou, China
| | - Wang-Xiang Yao
- Department of Orthopaedic Surgery, Affiliated Hangzhou First People's Hospital Zhejiang University School of Medicine, Hangzhou, China
| | - Liu-Long Zhu
- Department of Orthopaedic Surgery, Affiliated Hangzhou First People's Hospital Zhejiang University School of Medicine, Hangzhou, China
| | - Cong-Feng Luo
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Xiao-Shan Guo
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
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Wu P, Guo XS, Zhang X, Wu ZF, Wang RN, Li L, Liang M, Wang HL, Yan M, Qin ZX, Cheng PL, Jin CR, Yang MF, Wang YT, Li SJ. [Value of absolute quantification of myocardial perfusion by PET in detecting coronary microvascular disease in patients with non-obstructive coronaries]. Zhonghua Xin Xue Guan Bing Za Zhi 2020; 48:205-210. [PMID: 32234177 DOI: 10.3760/cma.j.cn112148-20191024-00652] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To compare the incidence of coronary microvascular disease (CMVD) between patients with non-obstructive and obstructive coronary arteries. Methods: We retrospectively analyzed 97 patients with angina pectoris, who underwent the absolute quantitative PET examination of myocardial perfusion and coronary anatomy examination within 90 days. All patients were divided into two groups: non-obstructive group (72 cases, no stenosis ≥50% in all three coronary arteries) and obstructive group (25 cases, at least one coronary stenosis ≥50%; and at least one coronary stenosis<50%). Quantitative parameters derived from PET including rest myocardial blood flow (RMBF), stress myocardial blood flow (SMBF), coronary flow reserve (CFR) and cardiovascular risk factors were compared between the two groups. CMVD was defined as CFR<2.90 and SMBF<2.17 ml·min(-1)·g(-1). Results: Incidence of CMVD was significant higher in the non-obstructive coronary arteries of the obstructive group than in the non-obstructive coronary arteries of non-obstructive group (47.1% (16/34) vs. 25.5% (55/216), χ(2)=6.738, P=0.009) while incidence of CMVD was similar between non-obstructive and obstructive patients ((44% (11/25) vs. 33.3% (24/72), χ(2)=0.915, P=0.339). RMBF ((0.83±0.14) ml·min(-1)·g(-1) vs. (0.82±0.17) ml·min(-1)·g(-1)), SMBF ((2.13±0.60) ml·min(-1)·g(-1) vs. (1.91±0.50) ml·min(-1)·g(-1)) and CFR (2.59±0.66 vs. 2.36±0.47) were similar between the two groups (all P>0.05). Conclusions: CMVD can occur in non-obstructive coronary arteries in both patients with non-occlusive coronary arteries and patients with obstructive coronary arteries. Prevalence of CMVD is significantly higher in patients with obstructive coronary arteries than in patients with non-obstructive coronary arteries. The CMVD severity is similar between the two groups.
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Affiliation(s)
- P Wu
- Department of Nuclear Medicine, First Hospital of Shanxi Medical University, Shanxi Key Laboratory of Molecular Imaging, Taiyuan 030001, China
| | - X S Guo
- Department of Nuclear Medicine, First Hospital of Shanxi Medical University, Shanxi Key Laboratory of Molecular Imaging, Taiyuan 030001, China
| | - X Zhang
- Province-Ministry Co-construction Collaborative Innovation Center for Molecular Imaging of Precision Medicine, Taiyuan 030001, China
| | - Z F Wu
- Department of Nuclear Medicine, First Hospital of Shanxi Medical University, Shanxi Key Laboratory of Molecular Imaging, Taiyuan 030001, China
| | - R N Wang
- Province-Ministry Co-construction Collaborative Innovation Center for Molecular Imaging of Precision Medicine, Taiyuan 030001, China
| | - L Li
- Department of Nuclear Medicine, First Hospital of Shanxi Medical University, Shanxi Key Laboratory of Molecular Imaging, Taiyuan 030001, China
| | - M Liang
- Department of Nuclear Medicine, First Hospital of Shanxi Medical University, Shanxi Key Laboratory of Molecular Imaging, Taiyuan 030001, China
| | - H L Wang
- Province-Ministry Co-construction Collaborative Innovation Center for Molecular Imaging of Precision Medicine, Taiyuan 030001, China
| | - M Yan
- Department of Nuclear Medicine, First Hospital of Shanxi Medical University, Shanxi Key Laboratory of Molecular Imaging, Taiyuan 030001, China
| | - Z X Qin
- Department of Nuclear Medicine, First Hospital of Shanxi Medical University, Shanxi Key Laboratory of Molecular Imaging, Taiyuan 030001, China
| | - P L Cheng
- Department of Nuclear Medicine, First Hospital of Shanxi Medical University, Shanxi Key Laboratory of Molecular Imaging, Taiyuan 030001, China
| | - C R Jin
- Department of cardiology, First Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - M F Yang
- Department of Nuclear Medicine, Beijing Chaoyang hospital, Capital Medical University, Beijing 100043, China
| | - Y T Wang
- Department of Nuclear Medicine, Third Affiliated Hospital of Soochow University (First People's Hospital of Changzhou), Changzhou 213003, China
| | - S J Li
- Department of Nuclear Medicine, First Hospital of Shanxi Medical University, Shanxi Key Laboratory of Molecular Imaging, Taiyuan 030001, China
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Wang XJ, Zhang ZH, Zhang J, Yu JP, An XJ, Zhou XS, Zhang HX, Liu F, Guo XS, Song JF, Chang F, Su YX, Li RS. [Malfunction of autophagy in tibial growth plate chondrocytes causes increased apoptosis rate in chronic renal insufficiency rats]. Zhonghua Yi Xue Za Zhi 2020; 100:141-145. [PMID: 31937055 DOI: 10.3760/cma.j.issn.0376-2491.2020.02.012] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To observe the effect of autophagy of tibial growth plate chondrocyte on apoptosis in chronic renal insufficiency (CRI) rats. Methods: Male 4-week-old SD rats were randomly divided into two groups: (1) Sham group: only the left ureter was exposed (n=10); (2) CRI group: the left ureter was ligated to cause CRI (n=10). The urine from all the rats was collected 6 weeks after the operation and the total protein content was measured. Then all the rats were sacrificed and the concentrations of creatinine and urea nitrogen in intracardiac blood were detected. The proximal tibia were fixed and decalcified to prepare histological sections, and the number of chondrocytes of column cells in the proliferative area of tibia growth plate was observed by saffron O staining. The expression rate of protein Light Chain-3, an autophagy marker of chondrocytes, was detected by immunofluorescence. The apoptosis rate of chondrocytes was detected by the method of TUNEL assay. The level of glycogenin-1, a glycogen formation marker of chondrocyte was detected by immunohistochemistry in chondrocytes. Results: The 24 h urine total protein was higher in CRI group [(163.5±11.3) mg vs (38.6±9.8) mg, t=25.620, P<0.001]. The levels of blood creatinine [(67.3±16.2) μmol/L vs (28.4±11.5) μmol/L, t=5.974, P<0.001] and urea nitrogen [(16.4±6.4) mmol/L vs (4.8±2.0) mmol/L, t=5.198, P<0.001] were higher in CRI group. The number of chondrocytes of column cells in the proliferating area of tibia growth plate was lower in CRI group (4.2±2.1 vs 9.1±3.8, t=3.109, P=0.006). The expression rate of LC-3 protein in chondrocytes of CRI group was lower [(27.2±12.6)% vs (51.4±18.2)%, t=3.457, P=0.003]. The level of glycogenin-1 of chondrocytes in CRI group increased significantly (6.1±2.5 vs 3.5±1.8, t=2.669, P=0.016). The apoptosis rate of chondrocytes in CRI group also increased [(17.2±4.8)% vs (5.1±3.4)%, t=6.505, P<0.001]. Conclusion: Malfunction of autophagy in tibial growth plate chondrocytes causes increased apoptosis rate in CRI rats, which might be caused by the failure of glycogen degradation in chondrocytes.
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Affiliation(s)
- X J Wang
- Department of Orthopaedic Surgery, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - Z H Zhang
- Shanxi Health Vocational College, Taiyuan 030012, China
| | - J Zhang
- Department of Orthopaedic Surgery, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - J P Yu
- Department of Orthopaedic Surgery, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - X J An
- Department of Orthopaedic Surgery, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - X S Zhou
- Department of Nephrology, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - H X Zhang
- Department of Nephrology, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - F Liu
- Medical Information and Data Center, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - X S Guo
- Department of Orthopaedic Surgery, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - J F Song
- Department of Orthopaedic Surgery, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - F Chang
- Department of Orthopaedic Surgery, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - Y X Su
- Department of Orthopaedic Surgery, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - R S Li
- Department of Nephrology, Shanxi Provincial People's Hospital, Taiyuan 030012, China
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Wang XJ, Zhang J, Liu F, Zhou XS, Zhao ZT, Guo XS, Song JF, Su YX, Li RS. [Effect of primary cilia expression rate on Wnt/β signaling pathway in tibial growth plate chondrocytes from chronic renal insufficiency young rats]. Zhonghua Yi Xue Za Zhi 2019; 99:3645-3651. [PMID: 31826587 DOI: 10.3760/cma.j.issn.0376-2491.2019.46.010] [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 observe the effect of primary cilia expression rate on Wnt/β signaling pathway in tibial growth plate chondrocytes from chronic renal insufficiency (CRI) young rats. Methods: Male 2-week-old SD rats were randomly divided into two groups: (1) Sham group: only the left ureter was exposed (n=6); (2) CRI group: the left ureter was ligated (n=6). Rats were sacrificed 2 weeks after the operation and the primary cilia expression rate of growth plate chondrocytes and key protein β-catenin in Wnt/β signaling pathway were observed in histological section of tibia specimen. Chondrocytes isolated from growth plate in two groups were cultured in vitro to P3 generation. The primary cilia expression rate and the level of β-catenin were measured. The primary cilia expression rate was detected by agonists and antagonists Wnt/β signaling pathway in chondrocytes of CRI group. The level of β-catenin was detected by using serum-free culture and chloral hydrate to intervene chondrocytes in CRI group. Results: The primary cilia expression rate of growth plate chondrocytes in histological section of tibia specimen in CRI group was higher than that in Sham group [(17.5±7.7)% vs (8.7±3.6)%, t=3.237, P=0.005], and the level of β-catenin was higher in CRI group (5.1±0.7 vs 1.9±0.8, t=6.731, P<0.001). The primary cilia expression rate of growth plate chondrocytes cultured in vitro in CRI group was higher than that in Sham group [(20.9±8.1)% vs (11.8±4.7)%, t=3.073, P=0.007], and the level of β-catenin was higher in CRI group (0.49±0.12 vs 0.25±0.11, t=3.297, P=0.011). There was no significant change in primary cilia expression rate after intervention by using Wnt/β signaling agonists and antagonists to change the level of β-catenin [agonists group: (21.3±7.6)%, control: (20.6±6.8)%, antagonists group: (22.4±6.2)%, F=0.173, P=0.842]. The level of β-catenin was significantly changed after intervention by using serum-free culture, chloral hydrate to alter the primary cilia expression rate (serum-free culture group: 0.61±0.23, control: 0.39±0.24, chloral hydrate group: 0.15±0.11, F=6.476, P=0.012). There was a positive correlation between the level of β-catenin and primary cilia expression rate. Conclusion: The primary cilia expression rate and the level of Wnt/β signaling pathway were higher in tibial growth plate chondrocytes in CRI rats model, and primary cilia might have positive regulatory effects on the Wnt/β signaling pathway.
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Affiliation(s)
- X J Wang
- Department of Orthopaedic Surgery, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - J Zhang
- Department of Orthopaedic Surgery, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - F Liu
- Medical Information and Data Center, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - X S Zhou
- Department of Nephrology, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - Z T Zhao
- Department of Orthopaedic Surgery, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - X S Guo
- Department of Orthopaedic Surgery, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - J F Song
- Department of Orthopaedic Surgery, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - Y X Su
- Department of Orthopaedic Surgery, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - R S Li
- Department of Nephrology, Shanxi Provincial People's Hospital, Taiyuan 030012, China
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Cao XJ, Jia ZW, Guo XS, Wang XD, Yu JP, Niu JW, Liu JY, Wei J. [Experimental study on the improvement of Ilizarov transverse tibial bone transport and microcirculation reconstruction technique]. Zhonghua Yi Xue Za Zhi 2019; 99:3592-3596. [PMID: 31826577 DOI: 10.3760/cma.j.issn.0376-2491.2019.45.012] [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 observe the effect of traditional and modified Ilizarov transverse tibial bone transport on microvascular regeneration of lower limbs in dogs. Methods: After general anesthesia on 10 experimental dogs, traditional and modified transverse tibial bone transport were performed on both tibias respectively. The control group was treated with the traditional method (the periosteum and bone flap were completely isolated), while the experimental group was treated with the modified method (the fibular periosteum of the open window bone flap was retained). All the external fixators were pulled outwards at a speed of 1 mm every day from 5 days after operation;after one week, the external fixators were moved back every 3 days for one week. The situation of wounds and activity of lower limbs were observed. Simultaneously, the angiogenesis was observed by digital subtraction angiography (DSA) through femoral artery at different stages, and the density of vascular endothelial cells measured by local tissue sections. The data before and after the operation were compared with paired t test. Results: The operation was successfully completed in 10 experimental dogs, and all wounds healed about 1 week after the operation. There was no significant abnormality in lower limb movements in all dogs. Peripheral blood vessel area in middle leg of lower limb in 4 weeks and 8 weeks after operation was (5.9±0.4) mm(2) and (6.9±0.6) mm(2) in control group and it was (6.2±0.6) mm(2) and (8.0±0.6) mm(2) in experimental group, respectively; all were significantly improved than those before the operation ((5.0±0.4) mm(2), (4.9±0.4) mm(2), respectively) (F=446.457, 829.192, both P<0.05). There was no significant differences in vessel area between the two groups at the 4th week after operation (t=1.216, P=0.240), but there was significant difference at the 8th week after operation between the two groups (t=4.423, P=0.000). The percentage of vascular endothelial cells in stained cells under endoscopy was 4.42%±0.28% and 5.63%±0.53% in the control group at the 8th week; and in the experimental group, it was 5.35%±0.26% and 7.18%±0.25%, respectively;all were significantly elevated than those before the operation; and there were significant differences between the two groups (t=7.35, 8.30, both P<0.05). Conclusion: Transverse tibial bone transport and microvascular network regeneration technology can reconstruct the microvasculature below the calf of dogs; the method of window-opening osteotomy is improved to "door" type window-opening, it can retain the lateral periosteum of tibial crest and regenerate the microvasculature network more abundantly.
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Affiliation(s)
- X J Cao
- Shanxi Medical University, Taiyuan 030001, China
| | - Z W Jia
- Department of Orthopedics, People's Hospital of Shanxi Province, Taiyuan 030012, China
| | - X S Guo
- Department of Orthopedics, People's Hospital of Shanxi Province, Taiyuan 030012, China
| | - X D Wang
- Department of Orthopedics, People's Hospital of Shanxi Province, Taiyuan 030012, China
| | - J P Yu
- Department of Orthopedics, People's Hospital of Shanxi Province, Taiyuan 030012, China
| | - J W Niu
- Shanxi Medical University, Taiyuan 030001, China
| | - J Y Liu
- Shanxi Medical University, Taiyuan 030001, China
| | - J Wei
- Department of Orthopedics, People's Hospital of Shanxi Province, Taiyuan 030012, China
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Fang X, Guo LW, Chen H, Ke WC, Guo W, Guo XS, Zhang Y. Characteristics of volatile flavor components in traditional fermented yak milk produced in different ecoregions of the Qinghai-Tibetan plateau. J Dairy Sci 2019; 103:191-200. [PMID: 31677830 DOI: 10.3168/jds.2019-17312] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 09/11/2019] [Indexed: 12/15/2022]
Abstract
The volatile flavor substances in traditional fermented yak milk samples collected from 5 ecoregions (A: coniferous forests and grasslands of the Qilian Qingdong Mountains; B: alpine grasslands surrounding the lakes in the Qiangtang Plateau; C: alpine shrubs and meadows of the Guoluo-Nagqu Highlands; D: coniferous forests along the alpine valley in East Tibet; E: shrubs and grasslands along the alpine valley in South Tibet) of the Qinghai-Tibetan plateau were comparatively analyzed. The relative percentage composition of volatile flavor substances varied among the different ecoregions. In samples collected from region E, more than 50% of the volatile flavor compounds were esters comprising mainly n-butyl acetate, butyl butyrate, and ethyl octanoate, and a considerable proportion of acetoin was found in samples from regions B and E. Greater proportions of 2-heptanone and 2-nonanone were observed in samples collected from regions A, C, and D compared with regions B and E.
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Affiliation(s)
- X Fang
- Department of Nutrition and Food Hygiene, School of Public Health, Lanzhou University, Lanzhou 730000, PR China
| | - L W Guo
- Department of Epidemiology and Health Statistics, College of Public Health, Sichuan University, Chengdu 610041, PR China
| | - H Chen
- Department of Nutrition and Food Hygiene, School of Public Health, Lanzhou University, Lanzhou 730000, PR China
| | - W C Ke
- State Key Laboratory of Grassland and Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China
| | - W Guo
- College of Pastoral Agricultural Science and Technology, Lanzhou University, Lanzhou 730000, PR China
| | - X S Guo
- State Key Laboratory of Grassland and Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China.
| | - Y Zhang
- Department of Nutrition and Food Hygiene, School of Public Health, Lanzhou University, Lanzhou 730000, PR China.
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Sun YF, Zhang MZ, Wang S, Dong WW, Chen JW, Guo XS, Wen SH, Zhao R, Guan DW. Relationship between the Degeneration and Regeneration of Neuromuscular Junction and Wound Age during the Repair of Mouse Skeletal Muscle Contusion. Fa Yi Xue Za Zhi 2019; 35:280-284. [PMID: 31282620 DOI: 10.12116/j.issn.1004-5619.2019.03.003] [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] [Received: 01/09/2019] [Indexed: 11/30/2022]
Abstract
Abstract Objective To investigate the morphological changes in the degeneration and regeneration of neuromuscular junctions (NMJ) during the repair of mouse skeletal muscle contusion and discuss the correlation between the degeneration and regeneration of NMJ and wound age. Methods A total of 50 healthy adult male mice were randomly divided into 10 groups, including 9 experimental groups and 1 control group. Immunofluorescent staining was applied, and neurofilament was marked with neurofilament protein-H (NF-H), presynaptic membrane was marked with synaptophysin (Syn), presynaptic membrane was marked with acetylcholine receptor (AChR). Morphological changes of NMJ regeneration at different time points after mouse skeletal muscle contusion were detected. Results The neurofilament and presynaptic membrane of NMJ at the junction of contusion zones began to degrade after contusion, and completed degradation at about 3 d post-injury. Then they gradually regenerated, roughly completing the regeneration at about 21 d and basically reaching the control group level. The ratio of presynaptic membrane quantity to presynaptic membrane quantity showed a trend of decreasing then rising and finally reaching the control level. Conclusion During the repair of mouse skeletal muscle contusion, the morphological changes and wound age of the NMJ at the junction of contusion zones have a close correlation, which is expected to be one of the biological indicators for forensic skeletal muscle wound age estimation.
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Affiliation(s)
- Y F Sun
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - M Z Zhang
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - S Wang
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - W W Dong
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - J W Chen
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - X S Guo
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - S H Wen
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - R Zhao
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - D W Guan
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
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Guo XS, Wen SH, Dong WW, Li BX, Chen ZY, Wang LL, Guan DW, Zhao R. Expression of Nrf2 in Different Cells after Human Cerebral Cortex Contusion. Fa Yi Xue Za Zhi 2019; 35:273-279. [PMID: 31282619 DOI: 10.12116/j.issn.1004-5619.2019.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Indexed: 11/30/2022]
Abstract
Abstract Objective To observe the expression changes of nuclear factor-erythroid derived 2-related factors (Nrf2) in different cells at different time points after human cerebral cortex contusion, and to discuss its application in brain wound age estimation. Methods Thirty-six human brain tissues were selected, of which 6 were for control and 30 were cortical contusion at different time points post-injury, which were divided into 0-1 h, 3-6 h, 1-3 d, 5-7 d, and 10-14 d post-injury groups, with 6 cases in each group. Based on paraffin embedded sections, HE staining was used to observe the morphological changes post-injury, and double immunofluorescence staining was used to detect the expression of Nrf2 in neurons, astrocytes, and microglia. The number of positive cells was counted and statistical analysis was made. Results The number of neurons decreased 1-3 d post-injury. The expression of Nrf2 cells in neurons increased after injury, and the rate of positive cells peaked at 1-3 d post-injury. Glial cells were activated 1-3 d post-injury, and the activation peaked at 5-7 d post-injury. The cerebromalacia began to form at 10-14 d post-injury. Glial fibrillary acidic protein (GFAP) positive cells in mice increased gradually after injury and peaked at 5-7 d post-injury, while the proportion of Nrf2 in GFAP positive cells was relatively stable. After injury, ionized calcium-binding adapter molecule 1 (IBA1) positive cells increased and activated gradually. The expression proportion of Nrf2 in IBA1 positive cells increased gradually, reached its peak at 5-7 d post-injury, and then decreased. Conclusion The expression of Nrf2 in different cells involves in the biological function of different cells post-injury, and the dynamic expression of single cells has a time-dependent pattern. This may provide a new reference index for the wound age estimation of brain contusion in human.
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Affiliation(s)
- X S Guo
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - S H Wen
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - W W Dong
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - B X Li
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Criminal Investigation Police University of China, Shenyang 110035, China
| | - Z Y Chen
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - L L Wang
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - D W Guan
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - R Zhao
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
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Chen JW, Wang PF, Zhang MZ, Zhang ZD, Cheng H, Sun YF, Wen SH, Guo XS, Zhao R, Guan DW. Relationship between Expression Changes of CB2R and Wound Age of Brain Contusion in Mice. Fa Yi Xue Za Zhi 2019; 35:136-142. [PMID: 31135105 DOI: 10.12116/j.issn.1004-5619.2019.02.002] [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] [Received: 01/11/2019] [Indexed: 11/30/2022]
Abstract
Abstract Objective To investigate the expression of cannabinoid type 2 receptor (CB2R) at different time points after brain contusion and its relationship with wound age of mice. Methods A mouse brain contusion model was established with PCI3000 Precision Cortical Impactor. Expression changes of CB2R around the injured area were detected with immunohistochemical staining, immunofluorescent staining and Western blotting at different time points. Results Immunohistochemical staining results showed that only a few cells in the cerebral cortex of the sham operated group had CB2R positive expression. The ratio of CB2R positive cells gradually increased after injury and reached the peak twice at 12 h and 7 d post-injury, followed by a decrease to the normal level 28 d post-injury. The results of Western blotting were consistent with the immunohistochemical staining results. Immunofluorescent staining demonstrated that the changes of the ratio of CB2R positive cells in neurons, CB2R positive cells in monocytes and CB2R positive cells in astrocytes to the total cell number showed a single peak pattern, which peaked at 12 h, 1 d and 7 d post-injury, respectively. Conclusion The expression of CB2R after brain contusion in neurons, monocytes and astrocytes in mice suggests that it is likely to be involved in the regulation of the biological functions of those cells. The changes in CB2R are time-dependent, which suggests its potential applicability as a biological indicator for wound age estimation of brain contusion in forensic practice.
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Affiliation(s)
- J W Chen
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - P F Wang
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - M Z Zhang
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - Z D Zhang
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - H Cheng
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - Y F Sun
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - S H Wen
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - X S Guo
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - R Zhao
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
| | - D W Guan
- Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China.,Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China
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10
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Yang L, Guo XS. [Treatment progress on femoral intertrochanteric fracture in the elderly]. Zhongguo Gu Shang 2019; 32:97-100. [PMID: 30884922 DOI: 10.3969/j.issn.1003-0034.2019.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Indexed: 11/18/2022]
Affiliation(s)
- Lei Yang
- Department of Traumatic Orthopaedics, Wenzhou Medical University Affiated Orthopaedics Hospital, Wenzhou 325003, Zhejiang, China;
| | - Xiao-Shan Guo
- Department of Traumatic Orthopaedics, Wenzhou Medical University Affiated Orthopaedics Hospital, Wenzhou 325003, Zhejiang, China
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11
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Xu DM, Ke WC, Zhang P, Li FH, Guo XS. Characteristics of Pediococcus pentosaceus Q6 isolated from Elymus nutans growing on the Tibetan Plateau and its application for silage preparation at low temperature. J Appl Microbiol 2018; 126:40-48. [PMID: 30223299 DOI: 10.1111/jam.14110] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 08/17/2018] [Accepted: 09/11/2018] [Indexed: 11/30/2022]
Abstract
AIMS Characteristics of a strain Pediococcus pentosaceus Q6 isolated from Elymus nutans growing on the Tibetan plateau and its effects on E. nutans silage fermentation stored at low temperature were investigated. METHODS AND RESULTS Sugar fermentation pattern and growth profiles of the strain Q6 and its reference strain APP were characterized. The strain Q6 and APP were inoculated to E. nutans at ensiling respectively; and ensiled at different temperatures (10, 15 and 25°C) for 30, 60 and 90 days. The results indicated that Q6 could grow at pH 3·0 and at 4°C. In contrast to APP, Q6 could ferment mannitol, saccharose, sorbitol and rhamnose. Lower pH in Q6-treated silages fermented for 60 days at 10 and 15°C was found compared with the control and APP-treated groups. For the silages that were stored at 10 or 15°C, the greatest lactic acid content were detected in Q6-inoculated silages ensiled for 30 and 60 days respectively. There were no differences in pH and lactic acid content between Q6- and APP-treated silages ensiled at 10 and 15°C for 90 days respectively. CONCLUSIONS Inoculation of the strain P. pentosaceus Q6 could improve fermentation quality of ensiled E. nutans at the early stage of ensiling stored at low temperature (10 or 15°C). SIGNIFICANCE AND IMPACT OF THE STUDY The selection of P. pentosaceus inoculants for improving silage quality at low temperature, which provides a candidate strain to make high-quality silage in regions with frigid climate.
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Affiliation(s)
- D M Xu
- State Key Laboratory of Grassland and Agro-ecosystems, School of Life Sciences, Lanzhou University, Lanzhou, China.,Probiotics and Biological Feed Research Centre, Lanzhou University, Lanzhou, China
| | - W C Ke
- State Key Laboratory of Grassland and Agro-ecosystems, School of Life Sciences, Lanzhou University, Lanzhou, China.,Probiotics and Biological Feed Research Centre, Lanzhou University, Lanzhou, China
| | - P Zhang
- State Key Laboratory of Grassland and Agro-ecosystems, School of Life Sciences, Lanzhou University, Lanzhou, China.,Probiotics and Biological Feed Research Centre, Lanzhou University, Lanzhou, China
| | - F H Li
- Probiotics and Biological Feed Research Centre, Lanzhou University, Lanzhou, China.,Stay Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - X S Guo
- State Key Laboratory of Grassland and Agro-ecosystems, School of Life Sciences, Lanzhou University, Lanzhou, China.,Probiotics and Biological Feed Research Centre, Lanzhou University, Lanzhou, China
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12
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Zhou JW, Zhong CL, Liu H, Degen AA, Titgemeyer EC, Ding LM, Shang ZH, Guo XS, Qiu Q, Li ZP, Yang G, Long RJ. Comparison of nitrogen utilization and urea kinetics between yaks ( Bos grunniens) and indigenous cattle ( Bos taurus). J Anim Sci 2018; 95:4600-4612. [PMID: 29108052 DOI: 10.2527/jas2017.1428] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Under traditional management on the Qinghai-Tibetan Plateau, yaks () graze only on natural pasture without supplements and are forced to cope with sparse forage of low N content, especially in winter. In contrast, indigenous Tibetan yellow cattle () require supplements during the cold season. We hypothesized that, in response to harsh conditions, yaks cope with low N intakes better than cattle. To test this hypothesis, a study of whole-body N retention and urea kinetics was conducted in 2 concurrent 4 × 4 Latin squares, with 1 square using yaks and 1 square using cattle. Four isocaloric forage-concentrate diets differing in N concentrations (10.3, 19.5, 28.5, and 37.6 g N/kg DM) were formulated, and by design, DMI were similar between species and across diets. Urea kinetics were determined with continuous intravenous infusion of NN urea for 104 h, and total urine and feces were concomitantly collected. Urea production, urea recycling to the gut, and ruminal microbial protein synthesis all linearly increased ( < 0.001) with increasing dietary N in both yaks and cattle. Urinary N excretion was less ( = 0.04) and N retention was greater ( = 0.01) in yaks than in cattle. Urea production was greater in yaks than in cattle at the 3 lowest N diets but greater in cattle than in yaks at the highest N diet (species × diet, < 0.02). Urea N recycled to the gut ( < 0.001), recycled urea N captured by ruminal bacteria ( < 0.001), and ruminal microbial protein production ( = 0.05) were greater in yaks than in cattle. No more than 12% of urea recycling was through saliva, with no difference between species ( = 0.61). Glomerular filtration rate was lower ( = 0.05) in yaks than in cattle. The higher urea recycling and greater capture of recycled urea by ruminal microbes in yaks than in cattle suggest that yaks use mechanisms to utilize dietary N more efficiently than cattle, which may partially explain the better survival of yaks than cattle when fed low-N diets.
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Tian Y, Guo XS, Nan J, Wang XL, Shen G. [Effect of treatment of infant parotid hemangioma with no response to oral propranolol]. Zhonghua Kou Qiang Yi Xue Za Zhi 2018; 53:49-51. [PMID: 29972964 DOI: 10.3760/cma.j.issn.1002-0098.2018.01.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Hemangioma is the most common vascular tumor in infantile period, and propranolol is the first choice, but there are still a few patients with poor curative effect. Seven cases of infant parotid hemangioma with no response to oral propranolol were treated with transcatheter arterial sclerosing embolization combined with cortisol and satisfactory results achievod. The treatment and efficacy are disccused in this paper.
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Affiliation(s)
- Y Tian
- Department of Burn & Plastic Surgery, Shanxi Children's Hospital, Taiyuan 030001, China
| | - X S Guo
- Department of Burn & Plastic Surgery, Shanxi Children's Hospital, Taiyuan 030001, China
| | - J Nan
- Department of Burn & Plastic Surgery, Shanxi Children's Hospital, Taiyuan 030001, China
| | - X L Wang
- Department of Burn & Plastic Surgery, Shanxi Children's Hospital, Taiyuan 030001, China
| | - G Shen
- Department of Intervention and Hemangioma, Guangzhou Women and Children Medical Center, Guangzhou 510623, China
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Ke WC, Ding WR, Xu DM, Ding LM, Zhang P, Li FD, Guo XS. Effects of addition of malic or citric acids on fermentation quality and chemical characteristics of alfalfa silage. J Dairy Sci 2017; 100:8958-8966. [PMID: 28918135 DOI: 10.3168/jds.2017-12875] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 07/30/2017] [Indexed: 11/19/2022]
Abstract
We studied the effects on alfalfa preservation and chemical composition of the addition of different levels of malic acid and citric acid at ensiling as well as the utilization efficiency of these 2 organic acids after fermentation. Alfalfa was harvested at early bloom stage. After wilting to a dry matter content of approximately 40%, the alfalfa was chopped into 1- to 2-cm pieces for ensiling. Four levels (0, 0.1, 0.5, and 1% of fresh weight) of malic acid or citric acid were applied to chopped alfalfa at ensiling with 4 replicates for each treatment, and the treated alfalfa forages were ensiled for 60 d in vacuum-sealed polyethylene bags (dimensions: 200 mm × 300 mm) packed with 200 to 230 g of fresh alfalfa per mini silo and an initial density of 0.534 g/cm3. The application of malic or citric acids at ensiling for 60 d led to lower silage pH than was observed in the control silage (0% of malic or citric acids). Application of the 2 organic acids led to higher lactic acid concentration in alfalfa silage than in the control silage except with the application rate of 1% of fresh weight. Silages treated with both organic acids had lower nonprotein nitrogen concentrations than the control silages, and the nonprotein nitrogen concentrations in ensiled forages decreased with the increase in malic or citric acid application rates. The application of the 2 organic acid additives led to lower saturated fatty acid proportions and higher polyunsaturated fatty acid proportions in ensiled alfalfa than in the control silage. The amount of malic and citric acids degraded during ensiling of alfalfa was 1.45 and 0.63 g, respectively. At the application rate of 0.5% of fresh weight, residues of malic acid and citric acid in alfalfa silage were 11.1 and 13.6 g/kg of dry matter. These results indicate that including malic or citric acids at the ensiling of alfalfa effectively improved silage fermentation quality, limited proteolysis, improved fatty acid composition of the ensiled forage, and could provide animals with additional feed additives proven to promote animal performance. However, when the application rate of both organic acids reached 1%, the concentration of lactic acid in silages decreased notably. Additionally, 0.5 and 1% application rates also increased the yeast count in ensiled alfalfa.
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Affiliation(s)
- W C Ke
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China; Probiotics and Biological Feed Research Centre, Lanzhou University, Lanzhou 730000, PR China
| | - W R Ding
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China; Probiotics and Biological Feed Research Centre, Lanzhou University, Lanzhou 730000, PR China
| | - D M Xu
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China; Probiotics and Biological Feed Research Centre, Lanzhou University, Lanzhou 730000, PR China
| | - L M Ding
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China
| | - P Zhang
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China
| | - F D Li
- State Key Laboratory of Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, PR China
| | - X S Guo
- State Key Laboratory of Grassland Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou 730000, PR China; Probiotics and Biological Feed Research Centre, Lanzhou University, Lanzhou 730000, PR China.
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Abstract
This study compared the results of external fixation combined with limited open reduction and internal fixation (EF + LORIF), minimally invasive percutaneous plate osteosynthesis (MIPPO), and intramedullary nailing (IMN) for distal tibia fractures. A total of 84 patients with distal tibia shaft fractures were randomized to operative stabilization using EF + LORIF (28 cases), MIPPO (28 cases), or IMN (28 cases). The 3 groups were comparable with respect to patient demographics. Data were collected on operative time and radiation time, union time, complications, time of recovery to work, secondary operations, and measured joint function using the American Orthopaedic Foot and Ankle Society (AOFAS) score. There was no significant difference in time to union, incidence of union status, time of recovery to work, and AOFAS scores among the 3 groups (P>.05). Mean operative time and radiation time in the MIPPO group were longer than those in the IMN or EF + LORIF groups (P<.05). Wound complications after MIPPO were more common compared with IMN or EF + LORIF (P<.05). Anterior knee pain occurred frequently after IMN (32.1%), and irritation symptoms were encountered more frequently after MIPPO (46.4%). Although EF + LORIF was associated with fewer secondary procedures vs MIPPO or IMN, it was related with more pin-tract infections (14.3%). Findings indicated that EF + LORIF, MIPPO, and IMN all achieved similar good functional results. However, EF + LORIF had some advantages over MIPPO and IMN in reducing operative and radiation times, postoperative complications, and reoperation rate. [Orthopedics. 2016; 39(4):e627-e633.].
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Zhou JW, Mi JD, Titgemeyer EC, Guo XS, Ding LM, Wang HC, Qiu Q, Li ZP, Long RJ. A comparison of nitrogen utilization and urea metabolism between Tibetan and fine-wool sheep. J Anim Sci 2016; 93:3006-17. [PMID: 26115287 DOI: 10.2527/jas.2014-8865] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
To study metabolic adaptation to harsh foraging conditions, an experiment was conducted to characterize and quantify N utilization efficiency and urea metabolism in Tibetan and fine-wool sheep fed 4 levels of dietary N (11.0, 16.7, 23.1, and 29.2 g N/kg DM) in 2 concurrent 4 × 4 Latin square designs. Urea kinetics were determined using continuous intrajugular infusions of 15N15N-urea. Urinary excretions of total N and urea N increased linearly (P < 0.001) with dietary N and were not different between breeds (P ≥ 0.37). Fecal N excretion increased with dietary N for Tibetan sheep but not for fine-wool sheep (linear dietary N × breed; P < 0.05). Nitrogen retention (both amount per day and percentage of N intake) increased with increasing dietary N concentration (P < 0.001), and the rates of increase were greater in fine-wool than in Tibetan sheep (linear dietary N × breed and cubic dietary N × breed; P < 0.05). In Tibetan sheep, N retention as a percentage of intake was greatest for diets containing 16.7 g N/kg DM, whereas it was maximal for fine-wool sheep when the diet contained 23.1 g N/kg DM. Urea N entry rate, urea N recycled to the gastrointestinal tract (GIT), and urea N returned to the ornithine cycle all increased with dietary N (P < 0.05), and all were greater in Tibetan than fine-wool sheep for the 11.0 g N/kg DM diet but were greater in fine-wool than Tibetan sheep for the diet with 29.2 g N/kg DM (linear dietary N × breed; P < 0.05). Urea N excreted in feces, both amount and fraction of GIT entry rate, was less in Tibetan than fine-wool sheep for the 11.0 and 16.7 g N/kg DM diets but similar for diets with 23.1 or 29.2 g N/kg DM (linear dietary N × breed; P < 0.01). For the lowest-protein diet, the fraction of urea N production recycled to the GIT was greater in the Tibetan than fine-wool sheep (88% vs. 82%), but for the diet with 29.2 g N/kg DM it was greater for fine-wool than Tibetan sheep (46% vs. 39%; linear dietary N × breed; P < 0.05). Plasma urea N increased more rapidly in response to increasing dietary N concentration for fine-wool sheep than for Tibetan sheep (linear dietary N × breed; P < 0.05). Urea tubular load and the amount and percentage of urea reabsorbed by the kidney were greater in Tibetan than fine-wool sheep (P < 0.05). These results suggest that Tibetan sheep have mechanisms that allow them to utilize N more efficiently than the fine-wool sheep when dietary N is inadequate.
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Yu KH, Hong JJ, Guo XS, Zhou DS. Comparison of reconstruction plate screw fixation and percutaneous cannulated screw fixation in treatment of Tile B1 type pubic symphysis diastasis: a finite element analysis and 10-year clinical experience. J Orthop Surg Res 2015; 10:151. [PMID: 26391358 PMCID: PMC4578385 DOI: 10.1186/s13018-015-0272-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 08/09/2015] [Indexed: 11/10/2022] Open
Abstract
Objective The objective of this study is to compare the biomechanical properties and clinical outcomes of Tile B1 type pubic symphysis diastasis (PSD) treated by percutaneous cannulated screw fixation (PCSF) and reconstruction plate screw fixation (RPSF). Materials and Methods Finite element analysis (FEA) was used to compare the biomechanical properties between PCSF and RPSF. CT scan data of one PSD patient were used for three-dimensional reconstructions. After a validated pelvic finite element model was established, both PCSF and RPSF were simulated, and a vertical downward load of 600 N was loaded. The distance of pubic symphysis and stress were tested. Then, 51 Tile type B1 PSD patients (24 in the PCSF group; 27 in the RPSF group) were reviewed. Intra-operative blood loss, operative time, and the length of the skin scar were recorded. The distance of pubic symphysis was measured, and complications of infection, implant failure, and revision surgery were recorded. The Majeed scoring system was also evaluated. Results The maximum displacement of the pubic symphysis was 0.408 and 0.643 mm in the RPSF and PCSF models, respectively. The maximum stress of the plate in RPSF was 1846 MPa and that of the cannulated screw in PCSF was 30.92 MPa. All 51 patients received follow-up at least 18 months post-surgery (range 18–54 months). Intra-operative blood loss, operative time, and the length of the skin scar in the PCSF group were significantly different than those in the RPSF group. No significant differences were found in wound infection, implant failure, rate of revision surgery, distance of pubic symphysis, and Majeed score. Conclusion PCSF can provide comparable biomechanical properties to RPSF in the treatment of Tile B1 type PSD. Meanwhile, PCSF and RPSF have similar clinical and radiographic outcomes. Furthermore, PCSF also has the advantages of being minimally invasive, has less blood loss, and has shorter operative time and skin scar.
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Affiliation(s)
- Ke-He Yu
- Department of Traumatic Orthopedics, Shandong Provincial Hospital, Shandong University, No. 324 Jin Wu Wei Seventh Road, Jinan, 250021, Shandong, China.
| | - Jian-Jun Hong
- Department of Orthopedics, The Second Affiliated Hospital of Wenzhou Medical University, 109# XueYuan Western Road, Wenzhou, Zhejiang, 325000, China.
| | - Xiao-Shan Guo
- Department of Orthopedics, The Second Affiliated Hospital of Wenzhou Medical University, 109# XueYuan Western Road, Wenzhou, Zhejiang, 325000, China.
| | - Dong-Sheng Zhou
- Department of Traumatic Orthopedics, Shandong Provincial Hospital, Shandong University, No. 324 Jin Wu Wei Seventh Road, Jinan, 250021, Shandong, China.
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Abstract
PURPOSE The objective of this study was to discuss the risk factors of postoperative limb overgrowth after the application of titanium elastic nailing (TEN) in the treatment of pediatric femoral fractures as well as analyze the causes and provide guidance for clinical treatment. METHODS The study included children with femoral fractures who were treated with TEN at our hospital from February 2005 to December 2009. Their age, gender, weight, cause of injury, having head trauma or not, fracture site, fracture type and nail-canal diameter (NCD) ratio were recorded. Student's t-test, chi-square test or Fisher's exact test was used for univariate analysis of the above factors, and then multivariate logistic regression analysis was used to analyze the possible risk factors in order to determine which ones are associated with limb overgrowth after the application of TEN to treat children with femoral fractures. RESULTS Univariate analysis showed that the age, gender, weight, cause of injury, having head trauma or not, and the fracture site did not have a statistically significant association with limb overgrowth (P = 0.741, 0.900, 0.253, 0.739, 0.967 and 0.105, respectively). The fracture type and NCD ratio were significantly associated with limb overgrowth (P = 0.003 and 0.000, respectively). Multivariate logistic regression analysis demonstrated that the fracture type (P = 0.021, OR = 2.757) and NCD ratio (P = 0.002, OR = 2.422) were independent risk factors for limb overgrowth. CONCLUSIONS The main factors affecting postoperative limb overgrowth are the fracture type and NCD ratio. In order to avoid limb overgrowth, unstable fractures should be fixed as firmly as possible, and the NCD ratio should be ≥0.8.
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Affiliation(s)
- Cheng-Qian Dai
- Zhejiang Spine Research Center, Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical College, 109 Xueyuanxi Road, 325000, Wenzhou, China
| | - Jie Yang
- Zhejiang Spine Research Center, Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical College, 109 Xueyuanxi Road, 325000, Wenzhou, China
| | - Xiao-Shan Guo
- Zhejiang Spine Research Center, Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical College, 109 Xueyuanxi Road, 325000, Wenzhou, China
| | - Liao-Jun Sun
- Zhejiang Spine Research Center, Department of Orthopaedic Surgery, Second Affiliated Hospital of Wenzhou Medical College, 109 Xueyuanxi Road, 325000, Wenzhou, China.
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Sun LJ, Yu XB, Dai CQ, Hu W, Guo XS, Chen H. Retraction notice to "A randomised prospective study of two different combined internal and external fixation techniques for distal tibia shaft fractures" [Injury 45 (2014) 1990 - 1995]. Injury 2015; 46:1700. [PMID: 26380851 DOI: 10.1016/j.injury.2015.06.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Sun LJ, Wu ZP, Dai CQ, Guo XS, Chen H. A comparative study of less invasive stabilization system and titanium elastic nailing for subtrochanteric femur fractures in older children. Acta Orthop Belg 2015; 81:123-130. [PMID: 26280865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The objective of this study was to compare prospectively the complications and the radiographic and clinical outcomes of reverse less invasive stabilization system (LISS) and titanium elastic nailing (TEN) for the treatment of subtrochanteric femur fractures in older children. From April 2004 to February 2012, 52 children aged from 10 to 15 years old with subtrochanteric fractures were included in this study. 26 patients were treated with reverse LISS (LISS group) and 26 children treated with titanium elastic nails (TEN group) respectively. Perioperative care was standardized. Surgical time, blood loss, length of hospitalization, hospital costs, fracture union time, full weight-bearing time and complications were analyzed. The radiologic results as well as hip functional outcomes were evaluated. The average follow-up time of LISS group was 36.5±9.3 months and TEN group was 40.2±10.6 months. No significant difference between these two groups was found in union time, full weight-bearing time and average length of hospitalization. However, the patients of LISS group had longer operation time (60.0±10.6 min vs. 40.5±7.4 min, p<0.01), more blood loss (130.0±45.0 ml vs. 15.5±10.2 ml, p<0.01), and more hospital costs (25000±700 RMB vs. 10800±500 RMB, p<0.01). The overall complication rate was significantly higher in the LISS group than in the TEN group (12/26 vs. 5/26, p=0.039). There was no significant difference between the two groups in terms of early and late radiological results. Using the Sanders score system, there were 13 excellent, 6 good and 7 fair results in the LISS group compared with 22 excellent and 4 good results in the TEN group. The excellent and good rate was significantly different between the two groups (p=0.010). Our results indicated that TEN fixation of subtrochanteric femur fractures in older children was associated with better function scores and a lower overall complication rate when compared with reverse LISS.
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Sun LJ, Yu XB, Dai CQ, Hu W, Guo XS, Chen H. A randomised prospective study of two different combined internal and external fixation techniques for distal tibia shaft fractures. Injury 2014; 45:1990-5. [PMID: 25457344 DOI: 10.1016/j.injury.2014.10.044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 09/10/2014] [Accepted: 10/13/2014] [Indexed: 02/02/2023]
Abstract
BACKGROUND External fixation combined with limited open reduction and internal fixation (EF + LORIF) is a well-accepted and effective method for distal tibia shaft fractures, but it was also related to complications. The objective of this study was to compare external fixation combined with closed reduction and internal fixation (EF + CRIF) with EF + LORIF in the treatment of distal tibia shaft fractures, and explore the benefits and defects of these two techniques. METHODS Fifty-six patients were randomised to operative stabilisation either by an external fixator combined with two closed titanium elastic nails or by external fixation combined with limited open reduction and internal fixation. Pre-operative variables included the patients’ age, sex, the affected side, cause of injury, Tscherne classification of soft tissue injury, fracture pattern, and time from injury to surgery. Peri-operative variables were the operating time and the radiation time. Postoperative variables were wound problems and other complications, union time, time of recovery to work, the functional American Orthopaedic Foot and Ankle surgery (AOFAS) score. RESULTS There was no significant difference in the mean operating time (72.6 ± 11.5 vs. 78.5 ± 16.4 min, P = 0.125), the time to union (21.2 ± 11.0 vs. 22.5 ± 12.3 weeks, P = 0.678), the time of recovery to work (25.0 ± 14.5 vs. 26.4 ± 13.6 weeks, P = 0.711), pin track infection (3/28 vs. 4/28, P = 1.000), delayed union (2/28 vs. 3/28, P = 1.000), pain (38.3 ± 1.6 vs. 38.7 ± 1.5, P = 0.339), function (44.4 ± 6.0 vs. 45.0 ± 5.5, P = 0.698), and total AOFAS scores (91.5 ± 7.4 vs. 93.4 ± 6.8, P = 0.322) between the two groups. However, the mean radiation time was longer in the EF + CRIF group than in the EF + LORIF group (2.0 ± 1.2 vs. 0.3 ± 0.1 min, P < 0.01). The EF + CRIF group had no wound complications while the EF + LORIF group had five wound complications, though the difference was not statistically significant (P = 0.052). Acceptable alignment was obtained in 50 patients (22 in EF + CRIF vs. 28 in EF + LORIF, P = 0.023). Two cases with EF + CRIF had a 6 degrees of recurvatum deformity and four had 6–9 degrees of valgus deformity. CONCLUSION Our results indicated that both EF + CRIF and EF + LORIF were reliable methods in treatment of distal tibia shaft fractures. EF + CRIF had fewer wound complications and broader indications while EF + LORIF had lower radiation exposure and better alignment.
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Sun LJ, Yang J, Tian NF, Wu YS, Yu XB, Hu W, Guo XS, Chen H. Pediatric femoral shaft fractures treated with titanium elastic nailing. Orthopedics 2014; 37:e1021-6. [PMID: 25361364 DOI: 10.3928/01477447-20141023-60] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Accepted: 03/04/2014] [Indexed: 02/03/2023]
Abstract
The objective of this study was to prospectively compare intraoperative fluoroscopy time and clinical and radiological results in pediatric femoral shaft fractures treated with titanium elastic nailing (TEN) using a small-incision, blind-hand reduction vs closed reduction. From February 2008 to December 2009, sixty-eight children were enrolled in the study. Patients were divided into 2 groups: group A comprised 34 patients treated with a small-incision, blind-hand reduction technique and group B comprised 34 patients treated with a closed reduction technique. Operative time, intraoperative fluoroscopy time, fracture union time, and complications were recorded in both groups. Clinical and radiological results were assessed using the TEN scoring system. Mean operative time was 30.5±8.5 in group A and 53.0±15.0 minutes in group B, and mean fluoroscopy time was 28.4±18.5 seconds in group A and 65.0±28.5 seconds in group B. Operative time and fluoroscopy time were significantly longer in group B (P<.001). According to the TEN scoring system, the results were excellent in 31 patients and good in 3 patients in group A and excellent in 29 patients and good in 5 patients in group B. There was no significant difference between the 2 groups in terms of clinical and radiological results. There was also no significant difference in terms of fracture healing time, weight-bearing time, and complications. The small-incision, blind-hand reduction technique provided similar clinical results as closed reduction. This technique could be an alternative to closed reduction because it significantly reduced intraoperative radiation exposure and operative time.
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Sun LJ, Wu ZP, Guo XS, Chen H. Management of distal third tibial fractures: comparison of combined internal and external fixation with minimally invasive percutaneous plate osteosynthesis. International Orthopaedics (SICOT) 2014; 38:2349-55. [DOI: 10.1007/s00264-014-2467-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 07/13/2014] [Indexed: 10/24/2022]
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Du SH, Yang J, Huang XX, Guo XS, Feng YZ. [Delayed union or nonunion of the ulna after intramedullary nailing for pediatric forearm fractures]. Zhongguo Gu Shang 2014; 27:605-608. [PMID: 25338451] [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: 06/04/2023]
Abstract
OBJECTIVE To analyze the causes of delayed union or nonunion of the ulna after intramedullary nailing in pediatric forearm fractures. METHODS From February 2005 to February 2010,5 patients with forearm fractures who were treated with titanium elastic nailing (TEN) were identified to fulfill the criteria of having developed a delayed union or nonunion of the ulna. The causes of delayed union or nonunion were investigated according to mechanism of injury, fracture location, treatments methods and postoperative management. All patients were male and the age was 3 to 14 years old with an average of 9.4 years. All fractures were located on the mid-third part of forearm. Two cases had a re-fracture. Among them, 3 cases caused by high-energy injury and 2 cases by falling down. Open reduction were performed in 4 cases while the other one was treated with closed reduction. Four patients were immobilized in an above-elbow cast, postoperatively. RESULTS All patients were followed up from 7 to 19 months with an average of 11.4 months. There were 4 delayed union and 1 nonunion. Three patients healed after the removal of the nail and avoidance of weight-bearing. Two patients healed by replacing another fixation. No patients had soft-tissue irritation or nail-entry-site infections.. The clinical effect was evaluated according to Daruwalla and Price scores with 3 excellent and 2 good of the results. CONCLUSIONS Using titanium elastic nailing for the treatment of pediatric both-bone forearm fractures is a good method. However,strict indication selection should be followed to avoid delayed union or nonunion.
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Jiang S, Yin SQ, Guo XS. [Therapeutic effects of treatment of posterior malleolar fractures with medial-extension type through posterioromedial and posteriorlateral incision]. Zhongguo Gu Shang 2014; 27:496-499. [PMID: 25241470] [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: 06/03/2023]
Abstract
OBJECTIVE To explore clinical outcomes of posterior malleolar fractures with medial-extension type through posterioromedial and posteriorlateral incision. METHODS From January 2008 to January 2011,25 patients with posterior malleolar fractures with medial-extension type were treated by hollow lag screw. Among them, 15 patients were treated through posteromedial incision,including 9 males and 6 females,aged from 21 to 67 years old with an average of 48.1 +/- 1.3; there were 5 cases with type A, 6 cases with type B and 4 cases with type C,according to Denis-Weber classification. Ten patients were treated by through posterior-lateral incision,including 6 males and 4 females, aged from 23 to 64 years old with an average of 46.9 +/- 1.5; there were 3 cases with type A, 5 cases with type B and 2 cases with type C,according to Denis-Weber classification. Operation time, blood loss, length of incision, times of X-ray exposure and complications of two groups were recorded and compared, Baird-Jackson effective evaluation were applied for evaluate clinical outcomes. RESULTS All patients were followed up from 12 to 49 months with an average of 20.6 months. There were significant differences in operation time, blood loss, times of X-ray exposure and complications between two group (P < 0.05). While there was no obvious meaning in clinical outcomes between two groups (P > 0.05). CONCLUSION Treating posterior malleolar fractures with medial-extension type through posteromedial approach can expose and fix fracture under direct vision, has advantages of shorter operation time, less X-ray exposure and blood loss, is a good choice of surgical approach.
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Tao L, Guo XS, Zhou H, Undersander DJ, Nandety A. Short communication: Characteristics of proteolytic activities of endo- and exopeptidases in alfalfa herbage and their implications for proteolysis in silage. J Dairy Sci 2012; 95:4591-5. [PMID: 22818473 DOI: 10.3168/jds.2012-5383] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Accepted: 04/08/2012] [Indexed: 11/19/2022]
Abstract
The pH optimum and thermostability of both exopeptidases and endopeptidases were investigated in this study to elucidate the possible role of plant proteases in proteolysis during ensiling of alfalfa herbage. Proteolytic activities of 4 classes of endopeptidases (i.e., serine, metallo, aspartic, and cysteine peptidase) and 5 classes of exopeptidases (i.e., aminopeptidase, carboxypeptidase, dipeptidase, dipeptidyl-peptidase, and tripeptidyl-peptidase) were examined within pH values of 3 to 9, and within temperatures from 20 to 90°C. Serine and metalloproteases, the principal endopeptidases that hydrolyzed most of the protein to nonprotein nitrogen in alfalfa silage, had optimum activities at pH 4. Among the major exopeptidases contributing protein degradation in ensiled alfalfa, dipeptidase and tripeptidyl-peptidase had stable activities between pH 4 and 6, and carboxypeptidase activity was optimal at pH 5. The optimum temperature for most peptidase activities was 40°C. Proteolytic activities of both endo- and exopeptidases increased with the elevation of incubating temperature from 20 to 40°C. The pH value in well-preserved alfalfa silage is often above 4.0, and the temperatures in the ensiled mass range from 25 to 40°C. Therefore, high proteolytic activities between pH 4 and 6 and the temperature range of ensiled alfalfa suggest that plant peptidases play a role in hydrolyzing protein during prolonged storage.
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Affiliation(s)
- L Tao
- Institute of Grassland Science, College of Animal Science and Technology, China Agricultural University, Beijing 100193, PR China
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Yin SQ, Pan J, Guo XS, Wu SK. [Treatment strategy of double disruption of the superior shoulder suspensor complex (SSSC)]. Zhongguo Gu Shang 2012; 25:170-172. [PMID: 22577728] [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: 05/31/2023]
Abstract
OBJECTIVE To discuss efficacy of the surgical treatment strategy of double disruption of the superior shoulder suspensor complex (SSSC). METHODS The data of 15 patients with double disruption of the SSSC were retrospectively analyzed from January 2008 to December 2009. There were 11 males and 4 females, with an average age of 45.1 years (ranged, 19 to 60). Of them, 8 patients were treated with surgery and 7 patients with conservative treatment. The short-term effectiveness was evaluated according to Constant-Murley scoring system. RESULTS All patients were followed up for 7 to 24 months with an average of 14.4 months. All fractures healed with a mean time of 12.3 weeks (ranged, 9 to 12). At final follow-up, the Constant-Murley scores with patients of surgical treatment was (92.37 +/- 1.99), and patients of conservative treatment was (55.52 +/- 1.29). CONCLUSION Surgical treatment can restore the integrality of SSSC, in favour of stability between upper limb and trunk.
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Affiliation(s)
- Shan-Qing Yin
- Department of Orthopaedics, the Second Affiliated Hospital of Wenzhou Medical College, Wenzhou 325000, Zhejiang, China
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Yi XH, Pan J, Guo XS. Anatomical and biomechanical study on the interosseous membrane of the cadaveric forearm. Chin J Traumatol 2011; 14:147-50. [PMID: 21635800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVE To study the anatomical and biomechanical features of the interosseous membrane (IOM) of the cadaveric forearm. METHODS Ten radius-IOM-ulna structures were harvested from fresh-frozen cadavers to measure the length, width and thickness of the tendinous portion of IOM. Then, the tendinous portion was isolated along with the ulnar and radial ends to which the tendon attached after measurement. The proximal portion of the radius and the distal portion of the ulna were embedded and fixed in the dental base acrylic resin powder. The embedded specimen was clamped and fixed by the MTS 858 test machine using a 10 000 N load cell for the entire tensile test. IOM was stretched at a speed of 50 mm/min until it was ruptured. The load-displacement curve was depicted with a computer and the maximum load and stiffness were recorded at the same time. RESULTS The IOM of the forearm was composed of three portions: central tendinous tissue, membranous tissue and dorsal affiliated oblique cord. IOM was stretched at a neutral position, and flexed at pronation and supination positions. The tendinous portion of IOM was lacerated in 6 specimens when the point of the maximum load reached to 1021.50 N+/-250.13 N, the stiffness to 138.24 N/m+/-24.29 N/m, and the length of stretch to 9.77 mm+/-1.77 mm. Fracture occurred at the fixed end of the ulna before laceration of the tendinous portion in 4 specimens when the maximum load was 744.40 N+/-109.85 N, the stiffness was 151.17 N/m+/-30.68 N/m, and the length of the stretch was 6.51 mm+/-0.51 mm. CONCLUSIONS The IOM of the forearm is a structure having ligamentous characteristics between the radius and the ulna. It is very important for maintenance of the longitudinal stability of the forearm. The anatomical and biomechanical data can be used as an objective criterion for evaluating the reconstructive method of IOM of the forearm.
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Affiliation(s)
- Xian-Hong Yi
- Department of Orthopaedics, Second Affiliated Hospital of Wenzhou Medical College, Wenzhou 325027, China
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Liang B, Guo XS, Tu J, Zhang D, Cheng JC. An acoustic rectifier. Nat Mater 2010; 9:989-992. [PMID: 20972430 DOI: 10.1038/nmat2881] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Accepted: 09/15/2010] [Indexed: 05/30/2023]
Abstract
The detection of acoustic signals is of relevance for a range of practical applications, for example in medical diagnostics. However, whereas rectification of electric current and other energy forms such as thermal flux has been demonstrated, acoustic rectification has not yet been achieved. Here, on the basis of the earlier theoretical proposal of an 'acoustic diode', we present the first experimental demonstration of a rectified energy flux of acoustic waves. A one-dimensional acoustic rectifier is fabricated by coupling a superlattice with a layer of ultrasound contrast agent microbubble suspension. A significant rectifying effect is observed within two frequency bands at locations that agree well with theoretical predictions. Following optimization of the concentration of the microbubble suspension, rectifying ratios can be as high as ~10(4). This realization of an acoustic rectifier should have substantial practical significance, for example in the focusing of ultrasound in medical applications.
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Zhou HB, Guo XS. [Progress of research on percutaneous fixation for the treatment of pelvic ring and acetabular injuries]. Zhongguo Gu Shang 2010; 23:719-722. [PMID: 20964012] [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: 05/30/2023]
Abstract
Percutaneous pelvic fixation is possible with the advances in intraoperative fluoroscopic imaging and other technologies. Percutaneously inserted screws in medullary pubic ramus,iliac wing, and iliosacral bone can stabilize pelvic or acetabular disruptions directly mean while can diminish operative blood loss, shorten operative time, and allow patient's early activity. Complications associated with open surgical procedures are similarly avoided by using percutaneous techniques. Stable and safe percutaneous fixation techniques depend on accurate closed reduction, excellent intraoperative fluoroscopic imaging, and detailed preoperative planning. A thorough knowledge of pelvic osseous anatomy, injury patterns, deformities, and the related intraoperative imagery techniques are essential for doctors to fulfill the operation of percutaneous pelvic fixation. This paper presents an overview of the technique of percutaneous surgery of the pelvis and acetabulum.
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Affiliation(s)
- Hai-Bo Zhou
- Department of Orthopedics, The First Affiliated Hospital of Wenzhou Medical College, Wenzhou 325000, Zhejiang, China.
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Zhou FY, Guo XS, Gao WY, Chen XL, Li ZJ, Jiang LF. [Clinical significance of MESS scoring system in the treatment of fractures of lower limb combined with vascular injuries]. Zhongguo Gu Shang 2010; 23:445-447. [PMID: 20669579] [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: 05/29/2023]
Abstract
OBJECTIVE To study the clinical significance of MESS scoring system in the treatment of fractures of lower limb combined with vascular injuries, and to evaluate its reliance. METHODS From March 2006 to March 2008, 28 patients with fractures of lower limb combined with vascular injuries were graded by MESS scoring system. There were 17 patients were male and 11 patients were female, ranging in age from 23 to 53 years, averaged 38 years. Seventeen patients had fractures at the superior segment of tibia and fibia, 7 patients had fractures at the inferior segment of femur, and other 4 patients had dislocation of knee joint. Among the patients, 18 patients had MESS scores more than 7.0 point, in which 13 patients were treated with one-stage amputation, 5 patients were treated with two-stage amputation; the other 10 patients had the MESS scores less than 7.0 point, and were treated with open reduction and internal fixation, in which 8 patients were treated with transplantation of great saphenous vein to repair blood vessles, and 2 patients were treated with vascular end to end anastomosis. RESULTS Among the patients, including 18 patients whose MESS scores more than 7.0 point were treated with one-stage or two-stage amputation, and 10 patients whose MESS scores less than 7.0 point were treated with limb salvage operations, all the limbs survived. During the follow-up period (ranged from 0.5 to 1 year, the movement and sensory function of the limbs recovered well. CONCLUSION MESS is a simple and reliable tool to determine the proper strategy for the patients suffering from vascular injuries with fractures.
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Affiliation(s)
- Fei-Ya Zhou
- Department of Orthopaedics, Second Hospital Affiliated to Wenzhou Medical College, Wenzhou 325027, Zhejiang, China
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Guo XS, Chen YQ, Yang XL, Wang LR. Novel Shear-horizontal Surface Acoustic Wave Based Immunosensors Using SiO<inf>2</inf>Waveguiding Layers And Flow Injection Analysis. Conf Proc IEEE Eng Med Biol Soc 2007; 2005:1921-4. [PMID: 17282596 DOI: 10.1109/iembs.2005.1616827] [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] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Surface acoustic wave (SAW) devices based on shear-horizontal (SH) waves can be used as mass-sensitive immunosensors. This paper presents a novel SH-SAW sensor to detect anti-immunoglobulin (IgG) molecules by means of the antibody-antigen binding mechanism. The sensor system comprising dual delay lines was fabricated on 36° Y-X LiTaO<inf>3</inf>substrate. A SiO<inf>2</inf>layer was used as love mode waveguiding layers, well as insulating and chemically resistant protective layer. Moreover, flow injection analysis (FIA) method was used for continuous detection the protein molecules. The protein A was immobilized on the optional surface of the gold layer, then coupled with IgG to adsorb the antigens to be measured in the protein solution. The operational frequency of the system changed due to the interaction of antibody-antigen binding. The experimental result demonstrates the sensor has stable frequency response to the mass loading effect of the various anti-IgG concentrations with the sensitivity up to 3.3ng/ml/Hz.
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Affiliation(s)
- X S Guo
- Biosensor National Special Laboratory, Dept. of Biomedical Engineering, Zhejiang University, Hangzhou 310027, P.R.China; College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310027, P.R.China. E-mail:
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Guo XS, Fang XS, Yang XL, Chen YQ, Wang LR. Capacitive monitoring of the antigen-antibody reactions enhanced by nanogold. Conf Proc IEEE Eng Med Biol Soc 2007; 2005:1260-3. [PMID: 17282423 DOI: 10.1109/iembs.2005.1616654] [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] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
An immunosensor for measuring antigen-antibody binding by nanogold particles enhancement was present here. A gold plate electrode was modified by a SAM (self-assembled monolayer) of 11-Mercaptoundecanioc Acid. Then sheep anti-rabbit IgG was immobilized onto the end of the 11-Mercaptoundecanioc Acid. With that the gold electrode was exposed to the mixed solution of rabbit IgG and nanogold labeled sheep anti-rabbit IgG. The differential capacitance of the electrical double layer was monitored to detect the antigen-antibody reaction. The result showed the capacity of the electrical double layer by nanogold enhancement was largely increased compared to that in traditional capacitive immunosensor. The detection sensitivity is up to 10nF / μg/ml.
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Affiliation(s)
- X S Guo
- Biosensor National Special Laboratory, Department of Biomedical Engineering; Department of Biosystems Engineering, Zhejiang University, Hang Zhou 310027, P.R.China. E-mail: Fax: +86-571-87951676
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Tan WB, Nie YL, Luo SQ, Guo XS, Zhu M, Cheng GJ, Peng XH. Identification of Novel Regulatory Elements of Human Stem Cell Factor Gene in MCF Cell. Sheng Wu Hua Xue Yu Sheng Wu Wu Li Xue Bao (Shanghai) 2002; 32:615-619. [PMID: 12058174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Human stem cell factor(hSCF)is a pluripotent growth factor that regulates proliferation, differentiation and migration of certain mammalian stem cells, such as primordial germ cells etc. It is shown that hSCF and its receptor are commonly co-expressed in human breast cancer cells. Up to now, the definite regulatory mechanism of hSCF gene in breast cancer cells is unclear, except that its 5'flanking sequence contains essential elements for regulating transcription. To localize the regulatory elements responsible for the regulation of the hSCF gene, we performed transient transfection study in MCF cells, with a series of luciferase reporter gene constructs, containing different 5x end deletions of hSCF gene. This study indicates that the region of -1190 -853 significantly enhanced the luc gene expression, while the region of -339 -162 inhibited the expression. Eletrophoretic mobility shift assay confirmed that MCF nuclear extract proteins bound to both -1190 -853 and -339 -273 regions, forming specific DNA-protein complexes, indicating that there were nuclear protein binding sites in these regions. The results suggest that both -1190 -853 and -339 -273 DNA fragments of the hSCF 5'flanking sequence may be novel regulatory elements, and may play a role in the regulation of hSCF gene expression in MCF cells.
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Affiliation(s)
- Wen-Bin Tan
- Molecular Biology Research Center, Hunan Medical University, Changsha 410078, China.
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Guo XS. Change of the hydrogen excitation cross sections due to the wake potential of a fast charged particle. Phys Rev A Gen Phys 1988; 38:3292-3298. [PMID: 9900758 DOI: 10.1103/physreva.38.3292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Guo XS, Zhang YZ. [HPLC separation and determination of active constituents of Qin Pi (Fraxinus chinensis)]. Yao Xue Xue Bao 1983; 18:525-8. [PMID: 6659956] [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: 01/21/2023]
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Guo XS, Zhang YZ. [Chemical studies on a Chinese drug Qin Pi, the bark of Fraxinus stylosa]. Yao Xue Xue Bao 1983; 18:434-9. [PMID: 6659941] [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: 01/21/2023]
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Guo XS, Zhang YZ. [Quantitative TLC-densitometry of coumarins in Qin Pi (Fraxinus stylosa)]. Yao Xue Xue Bao 1983; 18:446-52. [PMID: 6659943] [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: 01/21/2023]
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