1.Rat model of blood-ocular barrier breakdown induced by anterior segment intraocular analogic surgery
Maosong XIE ; Yongzheng ZHENG ; Guoxing XU
Chinese Journal of Ocular Fundus Diseases 2012;28(1):68-72
Objective To establish a rat model of blood ocular barrier breakdown induced by anterior segment intraocular analogic surgery. Methods One hundred and fifty healthy adult male rats were randomly divided into control group and model group,75 rats in each group.The rats were anesthetized with 1 ml/kg ketamine hydrochloride/xylazine hydrochloride solution.Three way pipes were attached to a phosphate buffer infusion bag and two intravenous catheters. One catheter was inserted 30° obliquelythrough the transparent cornea anterior to the limbus into the rat's anterior chamber.Then the needle was withdrawn and the sheath was indwelling.Another catheter was connected with a manometer.Intraocular pressure was varied from 0 to 12 mm Hg (1 mm Hg=0.133 kPa) 60 times,30 times per min.The catheter was removed.The eyes were treated with ofloxacin ophthalmic solution after surgery.The 1st,2nd,3rd,5th and 7th day after surgery,the integrity of the blood ocular barrier was assessed by immunohistochemical staining for albumin and quantitative measurement using Evan's blue as a tracer. Results Albumin immunohistochemical staining of the control group was confined to the iris and retinal blood vessels.The choroid was stained at each time point after surgery.Albumin immunohistochemical staining of the model group was abundant around the iris and the retinal vasculature on the 1st day after surgery.The albumin diffused throughout the iris and the retina on the 2nd and the 3rd day after surgery.The albumin reached the retinal vessels on the 5th and 7th day after surgery.The aqueous humor Evans blue leakages of the model group were higher than those of the control group on the 1st,2nd,3rd and 5th day after surgery.The differences were statistically significant (t=25.781,37.433,25.150,19.171; P<0.01).The Evans blue leakage of the model group was close to that of the control group on the 7th day after surgery. The difference was no statistical significant(t=1.303,P=0.209).The retinal Evans blue leakages of the model group were higher than those of the control group on the 1st,the 2nd and the 3rd day after surgery.The differences were statistically significant (t=11.997,14.622,23.014; P<0.01).The Evans blue leakage of the model group was close to those of the control group on the 5th and 7th day after surgery. The differences were not statistically significant(t=2.027,0.756 ; P=0.058,0.459).Conclusion This study establishes a rat model of blood ocular barrier breakdown induced by imitating the injury to the anterior segment during intraocular surgery.
2.Construction and application of network teaching platform for ocular fundus diseases
Guanghui LIU ; An LIU ; Yongzheng ZHENG ; Mingdong PAN ; Chaoyang XU ; Bingyi REN
Chinese Journal of Medical Education Research 2014;(7):751-754
In view of the deficiency of class hour and the limitations of classroom teaching in the course of ocular fundus disease, a network teaching platform, based on Browser/Server structure, was explored and constructed to assist classroom teaching. The network platform was constituted with teaching demonstration system, communication-test system, search system, and help system, mainly including 18 functional modules of learning-world et al. The students can be guided with the modules such as navigation, acting as a self-regulated learner through the modules such as learning-world, searching and downloading the related learning materials through the modules such as searching and discussing different learning topics with other students and their teachers through the modules such as forum. The network platform was used for classroom teaching of ocular fundus disease in auxiliary , and the result showed it was helpful to breaking the time and space constraints in conventional teach-ing, expanding the teaching content, solving the difficulties in teaching, improving the students' learning initiative, and realizing the interactive teaching.
3.125I Brachytherapy Seeds Implantation for Inoperable Low-Grade Leiomyosarcoma of Inferior Vena Cava.
Yuliang LI ; Yongzheng WANG ; Bin LIU ; Zheng LI ; Wujie WANG
Korean Journal of Radiology 2013;14(2):278-282
A 60-year-old female presented with abdominal pain and tenderness of five-day duration. Contrast enhanced CT showed a mass of 9 x 6 x 5.5 cm in size with almost complete obliteration of the inferior vena cava and massive extension to the extravascular space. CT-guided biopsy demonstrated a low-grade leiomyosarcoma. The patient underwent 125Iodine seeds implantation in two sessions, and another balloon cavoplasty. Abdominal pain and tenderness gradually improved and the patient continues to remain as disease free state for three years after the procedures.
Brachytherapy/*methods
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Contrast Media/diagnostic use
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Female
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Humans
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Iodine Radioisotopes/therapeutic use
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Leiomyosarcoma/radiography/*radiotherapy
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Middle Aged
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Tomography, X-Ray Computed
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Vascular Neoplasms/radiography/*radiotherapy
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*Vena Cava, Inferior
4.Reflection and prospect on acupuncture- moxibustion in treating Hashimoto’s thyroiditis
Yongzheng DONG ; Jimeng ZHAO ; Chunhui BAO ; Huifen XU ; Renzhao WU ; Zheng SHI ; Luyi WU ; Shimin LIU ; Baixiao ZHAO ; Jianbin ZHANG ; Shuguang YU ; Huangan WU
Journal of Acupuncture and Tuina Science 2016;14(6):443-450
Objective: To categorize and summarize the clinical and mechanism studies of the past 30 years on the treatment of Hashimoto’s thyroiditis (HT) with moxibustion, moxibustion plus medication, and acupuncture plus medication, etc., and to analyze the current problems. Methods: The clinical and laboratory studies related to the treatment of HT with acupuncture-moxibustion therapies published before June 2015 were retrieved from MEDLINE, Excerpta Medica Database (EMBASE), China National Knowledge Infrastructure (CNKI), Wanfang Academic Journal Full-text Database (Wanfang) and Chongqing VIP Database (CQVIP). Results:Moxibustion, moxibustion plus medication, and acupuncture plus medication can produce certain therapeutic effects in treating HT. Conclusion:The research on the treatment of HT with acupuncture-moxibustion therapies is rather limited in the amount and content. In the future, standardization should be fortified, specific moxibustion research needs deepening, and the action mechanism of moxibustion should be emphasized.
5. Purification and cultivation of mouse primary retinal microvascular pericytes based on pre-incubation
Guanghui LIU ; Cuihong LIN ; Tianye YANG ; Chaoyang XU ; Yongzheng ZHENG ; Li ZHAO ; Chun MENG ; Mingdong PAN
Chinese Journal of Experimental Ophthalmology 2019;37(10):774-778
Objective:
To establish a simple method for isolation, purification and cultivation of primary retinal microvascular pericytes (RMPs) from mice.
Methods:
Retinas were isolated from mice following with mechanical morcel, enzymatic digestion and filtration.The retinal fragments were incubated with low glucose DMEM with 20% fetal bovine serum after 24 hours pre-incubation.Differential digestion was used for purification of primary RMPs.Morphological examination of cells was performed by phase contrast microscopy, and further characterization was analyzed by immunocytochemistry.Functional assay was evaluated by the pericytes-endothelial cells (ECs) co-culture system.The treatment and use of experimental animals followed the regulations on the administration of experimental animals promulgated by the state science and technology commission.
Results:
Cells migrated out of fragments after 24 hours of incubation, and developed into small or large colonies gradually.The cells and their subpassages presented typical pericyte morphology with large irregular triangular cell bodies and multiple long processes.No contact inhibition was observed.Most cells uniformly expressed the cellular markers α-smooth muscle actin (α-SMA) and platelet-derived growth factor receptor-β (PDGFR-β), a few cells expressed the cellular markers glial fibrillary acidic protein (GFAP), but no cell expressed von Willebrand factor (vWF). The purity rate of RMPs was up to 97%.In the co-culture system, RMPs directly contacted with ECs to form the capillary-like cords in vitro.
Conclusions
A simple method for the isolation, purification cultivation of mouse RMPs is established, and active RMPs can be readily obtained by this method.