• <tr id="yyy80"></tr>
  • <sup id="yyy80"></sup>
  • <tfoot id="yyy80"><noscript id="yyy80"></noscript></tfoot>
  • 99热精品在线国产_美女午夜性视频免费_国产精品国产高清国产av_av欧美777_自拍偷自拍亚洲精品老妇_亚洲熟女精品中文字幕_www日本黄色视频网_国产精品野战在线观看 ?

    Effects of electroacupuncture on angiogenesis and cortical VEGF and BDNF expression in rats with focal cerebral ischemia

    2022-04-18 06:51:22LIMengxing李夢醒WANGYu王玉GAOYunyun高云云YAOXiaowen姚曉雯LANWei蘭崴TANGWei唐巍
    關(guān)鍵詞:王玉重點項目國家自然科學(xué)基金

    LI Mengxing (李夢醒), WANG Yu (王玉), GAO Yunyun (高云云), YAO Xiaowen (姚曉雯), LAN Wei (蘭崴),TANG Wei (唐巍)

    1 College of Acupuncture and Moxibustion, Anhui University of Chinese Medicine, Hefei 230012, China

    2 Graduate School, Anhui University of Chinese Medicine, Hefei 230012, China

    Abstract

    Keywords: Acupuncture Therapy; Electroacupuncture; Brain Ischemia; Ischemic Stroke; Cerebrovascular Circulation;Vascular Endothelial Growth Factors; Brain-derived Neurotrophic Factor; Rats

    Cerebral ischemic stroke (CIS) is a localized necrosis of brain tissues caused by cerebral blood supply disorders,resulting in progressive aggravation of brain damage and various degrees of neurological dysfunction[1].Studies have shown that angiogenesis is an endogenous protective mechanism for brain tissues to regain oxygen and nutrients after ischemia[2]. Angiogenesis promotes a highly coupled neural repair process, which is beneficial to the recovery of neural function[3].Acupuncture is an effective method to prevent and treat cerebral ischemia[4]. Previous studies have found that the mechanism of acupuncture in CIS treatment is closely related to angiogenesis[5], but there are few studies on the acupuncture treatment method for stroke and the expression changes of angiogenesisrelated factors in different periods. “Concurrent treatment of the brain and heart” is a new idea for the treatment of cardiovascular and cerebrovascular diseases based on the theory of “treating different diseases with the same approach” in traditional Chinese medicine. Therefore, this study focused on the expression of vascular endothelial growth factor (VEGF)and brain-derived neurotrophic factor (BDNF) in the cortex of rats with focal cerebral ischemia and explored the effect of “concurrent treatment of the brain and heart” EA on promoting angiogenesis in CIS. It can provide some reference for EA treatment of cerebral ischemia.

    1 Material and Methods

    1.1 Experimental animals and groups

    A total of 108 specific-pathogen-free male Sprague-Dawley rats (body mass: 280-320 g), were included in this experiment, with the experimental animal production license number of [SCXK (Lu) 20190003],ambient humidity of 45%-55%, room temperature of 20-25℃. Rats were free access to food and water, and fasted for 12 h before surgery. According to the random number table method, 27 rats were divided into the sham-operation group, and the rest of rats were subjected to the right middle cerebral artery occlusion(MCAO) model preparation. The successful models were randomly divided into a model group, a traditional acupoint group, and a concurrent treatment of the brain and heart group (n=27). This experiment was approved by the Animal Experiment Management Committee of Anhui University of Traditional Chinese Medicine, and the experimental process complied with theGuiding Principles for the Care of Experimental Animalsformulated by the Ministry of Science and Technology of the People’s Republic of China.

    1.2 Main reagents and instruments

    Mouse anti-rat VEGF monoclonal antibody (Cat. No.sc-7269, SANTA CRUZ, USA); mouse anti-rat BDNF monoclonal antibody (Cat. No. ab205067, Abcam, UK);PV-6000 universal secondary antibody kit (Cat. No.D1007, Beijing Zsbio, China); FITC-goat anti-rabbit fluorescent secondary antibody (Cat. No. D1007, Beijing Zsbio, China); rabbit anti-CD34 polyclonal antibody (Cat.No. bs-2038R, Beijing Boaosen Biotechnology Co., Ltd.,China); quantitative reverse transcription-polymerase chain reaction (qRT-PCR) kit (Cat. No. ZB-2305, TaKaRa Bio Inc, China); total RNA extraction reagent (Cat. No.15596026, Life Technologies, USA).

    PeriFlux 5000 laser Doppler tissue flow instrument[Perimed (China), China]; H-800 transmission electron microscope (Leica, Germany); PIKOREAL 96-well real-time fluorescent quantitation PCR instrument(Thermo Fisher Scientific China Co., Ltd., China); Eclipse 80i confocal fluorescence microscope, optical microscope (Nikon Corporation, Japan); JD-801 gel imaging analysis system, DP-801 morphological microscopic image analysis system (Jiangsu Jetta Technology Development Co., Ltd., China); Image Pro Plus image processing system (Media Cybernetic, USA);SDZ-V multifunctional EA therapeutic apparatus(Suzhou Medical Products Factory Co., Ltd., China);PIKOREAL 96 PCR meter (Thermo Fisher Scientific China,China).

    1.3 Model preparation

    The MCAO model was prepared with reference to the relevant literature[6]. After isoflurane inhalation anesthesia, the rat skin was incised in the middle of the neck slightly to the right, and then the common carotid,the external carotid, and the internal carotid arteries were separated and exposed layer by layer. Slowly pushed the thread from the bifurcation of the external carotid and internal carotid artery into the internal carotid artery, and stopped at about 18-20 mm, fixed and sutured.

    The steps of the sham-operation group were the same as above, while only the carotid artery was separated, and routinely fixed and sutured without nylon thread insertion.

    The degree of rat’s neurological functional impairment was assessed with an 18-point modified neurological severity score (mNSS) 4 h after surgery[7].The lowest score of mNSS was 0 point and the highest score was 18 points. A higher score indicated a more serious neurological functional impairment. In this experiment, the mNSS of 2-18 points indicated a successful model.

    1.4 Therapeutic methods

    EA therapy was performed 4 h after the operation.

    Shuigou (CV26), the left Quchi (LI11), Hegu (LI4), and Zusanli (ST36) in the traditional acupoint group, while Fengfu (GV16), Baihui (GV20), and the left Xinshu (BL15)and Neiguan (PC6) in the concurrent treatment of the brain and heart group were positioned referring to the relevant literature[8].

    The rat was fixed on the rat board. Needles of 0.25 mm in diameter and 15 mm in length were connected to the EA therapeutic apparatus for acupuncture after insertion. The sparse-dense wave with a frequency of 4 Hz/20 Hz and a stimulating current intensity of about 0.5 mA was used. It was appropriate to see slight shaking at the acupuncture site. The treatment lasted 20 min/time, once a day for 14 consecutive days.

    Rats in the sham-operation group and the model group were grasped and fixed under the same conditions without treatment.

    1.5 Experimental indicators and detection methods

    1.5.1 Neurological severity score

    Before and after treatment, the 18-point mNSS was used to evaluate the rat’s neurological functional impairment and recovery.

    1.5.2 Detection of regional cerebral blood flow (rCBF)in the ischemic side by laser Doppler

    The rCBF was detected 5 min after wire insertion and after EA on the 3rd, 7th, and 14th days, respectively.Nine rats were randomly selected from each group.After isoflurane inhalation anesthesia, the head was fixed to the brain stereotaxic instrument, a cranial window was drilled along the coronal suture and sagittal suture, and the Doppler fiber optic probe was fixed to the cranial window. The ischemic regional cerebral blood flow was dynamically monitored, and the average blood flow was calculated using software,and recorded.

    1.5.3 Detection of micro-vessel density (MVD) by immunohistochemistry

    After the treatment, 3 rats were randomly selected from each group, and the rats were fixed in the same anesthesia procedure as above. After perfusion with 0.9% physiological saline, the brains were separated and fixed in paraformaldehyde solution for 48 h. Followed by dehydration, embedding, sectioning (about 4 μm in thickness), spreading, and baking in sequence. Added CD34 primary and secondary antibodies to the sections,incubated, color-developed, and mounted. The sections were observed under a light microscope, and the endothelial cells stained with brownish-yellow were used as the positive staining standard, and the average count of 5 randomly selected fields was used as the MVD value.

    1.5.4 Detection of VEGF and BDNF positive expression by immunofluorescence

    After treatment, 3 rats were randomly selected from each group, and paraffin sections were made with the same steps as above. The slices were soaked and rewarmed for 20 min, immersed in PBS for 3 times,3 min/time. After blotting the PBS with absorbent paper,goat serum was added dropwise, the slides were then blocked at room temperature for 30 min. The primary antibody, secondary antibody, and DAPI were added dropwise according to the steps and incubated in the dark. Nuclei were stained, dehydrated, mounted, and observed under a confocal fluorescence microscope.Visible green fluorescent immunoreactive positive products labeled with fluorescein isothiocyanate (FITC)in the neuron cytoplasm of the cortex were VEGF and BDNF proteins. The scanned images were analyzed by Image J software. The average optical density (AOD) of immunopositive reactions was calculated.

    1.5.5 Detection of VEGF and BDNF mRNA expression by qRT-PCR

    After treatment, 3 rats were randomly selected from each group and received anesthesia with the same steps as above. The brains were separated on ice after decapitation, with RIPA lysate added dropwise, and ground on ice for 20 min followed by centrifugation for protein extraction. Total RNA from cortical tissues was extracted with TRIzol according to the instruction, and the cDNA was reverse transcribed and stored at -80°C for later use. The β-actin is an internal reference gene,referring to the Genbank nucleotide sequence data. The probes for mRNA detection are shown in Table 1. A gel imaging analysis system was used to scan the electrophoresis film. The absorbance value of the target gene/the absorbance value of the internal reference gene was used as the relative expression level of the target gene.

    Table 1. Primers for mRNA detection

    1.6 Statistical analysis

    Data processing was performed using SPSS version 22.0 statistical software. Measurement data conforming to normal distribution were presented as mean ±standard deviation (±s), one-way analysis of variance was used for comparisons among multiple groups, and the least significant difference test was used for pairwise comparisons between two groups. Repeated measures analysis of variance was used to compare data at multiple time points for the same indicator. The test level wasα=0.05, andP<0.05 indicated that the difference was statistically significant.

    2 Results

    2.1 Comparison of mNSS

    There were significant differences in the mNSS among different groups (P<0.01); there were significant differences in the mNSS changes in each group between different time points (P<0.01), and there was a significant interaction between grouping and time(P<0.01). The time factor was controlled for comparison between groups. Compared with the sham-operation group at the same time point, the mNSS of the model group significantly decreased (P<0.01); on the 3rd, 7th,and 14th days of treatment, the mNSS of the traditional acupoint group and the concurrent treatment of the brain and heart group was lower than that of the model group (P<0.01); on the 14th day, the mNSS of the concurrent treatment of the brain and heart group was lower than that of the traditional acupoint group(P<0.05).

    The grouping factor was controlled for comparing different time points within the group. Except for the sham-operation group, the mNSS in the other three groups significantly decreased with the extension of time within the group (P<0.01), and the scores were the lowest on the 14th day (P<0.01).

    Please see Table 2 for details.

    2.2 Comparison of rCBF in the ischemic side of the brain

    There were significant differences in the rCBF between groups (P<0.01); there were significant differences in the rCBF of each group between different time points (P<0.01), and there was a significant interaction between grouping and time (P<0.01).

    Compared with the sham-operation group at the same time point, the rCBF in the model group significantly decreased (P<0.01); the rCBF of the two EA groups was higher than that of the model group on the 7th and 14th days of treatment (P<0.01); the rCBF of the concurrent treatment of the brain and heart group was higher than that of the traditional acupoint group on the 14th day (P<0.05).

    The grouping factor was controlled, and the comparisons between different time points within the group were carried out. Except for the sham-operation group, the rCBF significantly increased on the 3rd, 7th,and 14th days in the other three groups over time(P<0.01). Compared with the 3rd and 7th days in the two EA groups, the rCBF reached the highest on the 14th day (P<0.05 orP<0.01). These results suggest that a significant improvement in the cerebral blood flow on the 3rd day and accumulate with time.

    Please see Table 3 for details.

    2.3 Comparison of cortical MVD of the ischemic side

    There were significant differences in the MVD among different groups (P<0.01); the change of MVD at each time point was statistically significant in each group(P<0.01), and there was a significant interaction between grouping and time (P<0.01).

    The time factor was controlled for comparison between groups. Compared with the sham-operation group at the same time point, the MVD in the model group significantly decreased (P<0.01). The MVD in the two EA groups was higher than that in the model group on the 7th and 14th days of treatment (P<0.05 orP<0.05). The MVD of the concurrent treatment of the brain and heart group was higher than that of the traditional acupoint group (P<0.05 orP<0.01).

    Controlling the grouping factor and comparing between different time points within the group, there was no statistical difference at each time point in the MVD in the sham-operation group (P>0.05); the MVD on the 7th and 14th days was higher than that on the 3rd day in the other three groups (P<0.05 orP<0.01).

    Please see Figure 1-Figure 3 and Table 4 for details.

    Table 2. Comparison of the mNSS among groups (±s point)

    Table 2. Comparison of the mNSS among groups (±s point)

    Note: mNSS=Modified neurological severity score; compared with the sham-operation group at the same time point, 1) P<0.01;compared with the model group at the same time point, 2) P<0.01; compared with the traditional acupoint group at the same time point, 3) P<0.05; compared with the same group at 4 h, 4) P<0.01; compared with the same group on the 3rd day, 5) P<0.01;compared with the same group on the 7th day, 6) P<0.01

    Group n 4 h 3 d 7 d 14 d Sham-operation 9 0 0 0 0 Model 9 9.33±0.711) 8.78±0.441) 7.67±1.121)4)5) 5.11±0.781)4)5)6)Traditional acupoint 9 9.11±0.60 7.89±0.932)4) 5.44±0.532)4)5) 4.00±0.872)4)5)6)Concurrent treatment of the brain and heart 9 9.00±0.71 7.56±0.732)4) 5.00±0.872)4)5) 3.33±0.712)3)4)5)6)Grouping F=1 036.03, P<0.01 Time F=221.29, P<0.01 Interaction between grouping and time F=28.38, P<0.01

    Table 3. Comparing regional cerebral blood flow (rCBF) in the ischemic side of the rat brain among groups (±s PU)

    Table 3. Comparing regional cerebral blood flow (rCBF) in the ischemic side of the rat brain among groups (±s PU)

    Note: rCBF=Regional cerebral blood flow; compared with the sham-operation group at the same time point, 1) P<0.01; compared with the model group at the same time point, 2) P<0.01; compared with the traditional acupoint group at the same time point, 3) P<0.05;compared with the same group at 5 min, 4) P<0.01; compared with the same group on the 3rd day, 5) P<0.01; compared with the same group on the 7th day, 6) P<0.01

    Group n 5 min 3 d 7 d 14 d Sham-operation 9 132.10±1.35 133.22±1.78 133.15±1.59 133.95±2.58 Model 9 8.93±0.751) 90.00±1.541)4) 90.23±1.721)4) 91.08±1.551)4)Traditional acupoint 9 8.82±1.61 91.70±2.624) 104.07±2.532)4)5) 110.34±3.682)4)5)6)Concurrent treatment of the brain and heart 9 8.80±1.03 91.67±2.114) 105.20±1.942)4)5) 113.12±1.662)3)4)5)6)Grouping F=3 856.92, P<0.01 Time F=15 220.20, P<0.01 Interaction between grouping and time F=1 696.53, P<0.01

    Figure 1. Micro-vessel density (MVD) counts in the ischemic side of each group on the 3rd day (immunohistochemistry, ×400)

    Figure 2. Micro-vessel density (MVD) counts in the ischemic side of each group on the 7th day (immunohistochemistry, ×400)

    Figure 3. Micro-vessel density (MVD) counts in the ischemic side of each group on the 14th day (immunohistochemistry, ×400)

    Table 4. Comparison of the MVD counts in the cerebral ischemic side of rats in each group (±s number)

    Table 4. Comparison of the MVD counts in the cerebral ischemic side of rats in each group (±s number)

    Note: MVD=Micro-vessel density; compared with the sham-operation group at the same time point, 1) P<0.01; compared with the model group at the same time point, 2) P<0.01, 3) P<0.05; compared with the traditional acupoint group at the same time point, 4)P<0.01, 5) P<0.05; compared with the same group on the 3rd day, 6) P<0.01, 7) P<0.05

    Group n 3 d 7 d 14 d Sham-operation 3 4.33±0.58 4.67±0.58 5.33±0.58 Model 3 10.67±0.581) 16.00±1.001)6) 15.33±0.581)6)Traditional acupoint 3 13.33±0.582) 17.67±1.153)6) 18.67±0.582)7)Concurrent treatment of the brain and heart 3 15.33±1.152)5)20.33±0.582)4)7) 21.33±1.152)3)4)7)Grouping F=625.79, P<0.01 Time F=95.14, P<0.01 Interaction between grouping and time F=8.07, P<0.01

    2.4 Comparison of the positive expression of VEGF and BDNF in the ischemic side of cerebral cortex

    There were significant differences in the positive expression of VEGF and BDNF among different groups(P<0.01); the positive expression of VEGF and BDNF changed significantly over time in each group (P<0.01).There was a significant interaction between grouping and time (P<0.01).

    The time factor was controlled for comparing the positive expression of VEGF and BDNF between groups.Compared with the sham-operation group at the same time point, the positive expression of VEGF and BDNF significantly increased in the model group (P<0.01).Compared with the model group, the positive expression significantly increased in the two EA groups(P<0.01). The VEGF expression in the concurrent treatment of the brain and heart group was higher than that in the traditional acupoint group on the 7th and 14th days (P<0.05), and the BDNF expression in the concurrent treatment of the brain and heart group was significantly higher than that in the traditional acupoint group on the 14th day (P<0.01).

    The grouping factor was controlled, and the comparison between different time points within the group was carried out. There was no significant difference in the BDNF expression between the shamoperation group and the model group at each time point (P>0.05). The positive VEGF expression increased on the 7th and 14th days in the model group (P<0.05).On the 7th day in the traditional acupoint group, the positive expression of VEGF and BDNF reached the highest (P<0.05). The positive VEGF expression was the highest on the 7th day in the concurrent treatment of the brain and heart group, and the positive BDNF expression on the 7th and 14th days was higher than that on the 3rd day (P<0.05).

    Please see Figure 4-Figure 9 and Table 5-Table 6 for details.

    2.5 Comparison of the VEGF and BDNF mRNA expression in the ischemic side of cerebral cortex

    There were significant differences in the VEGF and BDNF mRNA expression among different groups(P<0.01). The changes in the VEGF and BDNF mRNA expression were statistically significant in each group over time (P<0.01). There was a significant interaction between grouping and timeP<0.01).

    The time factor was controlled for comparing the mRNA expression of VEGF and BDNF between groups.Compared with the sham-operation group at the same time point, the mRNA expression of VEGF and BDNF significantly increased in the model group (P<0.01).Compared with the model group, the expression significantly increased in both EA groups (P<0.01). The expression levels were significantly higher in the concurrent treatment of the brain and heart group than in the traditional acupoint group on the 7th day of treatment (P<0.01).

    Controlling the grouping factor and comparing between different time points within the group, there was no significant difference in the VEGF and BDNF mRNA expression between the sham-operation group and the model group at each time point (P>0.05); the mRNA expression levels of VEGF and BDNF were the highest in both the traditional acupoint group and the concurrent treatment of the brain and heart group on the 7th day (P<0.05 orP<0.01). The above results suggest that EA regulates the expression of key angiogenesis factors VEGF and BDNF; different acupoint combinations can produce different regulatory effects,and the concurrent treatment of the brain and heart group has a better result.

    Please see Figure 4-Figure 9 and Table 7-Table 8 for details.

    Figure 4. Positive VEGF expression in the rat ischemic cortex of each group on the 3rd day (immunofluorescence, ×200)

    Figure 5. VEGF positive expression in the ischemic cortex of each group on the 7th day (immunofluorescence, ×200)

    Figure 6. Positive VEGF expression in the ischemic cortex of each group on the 14th day (immunofluorescence, ×200)

    Figure 7. Positive BNDF expression in the ischemic cortex of each group on the 3rd day (immunofluorescence, ×200)

    Figure 8. Positive BNDF expression in the ischemic cortex of each group on the 7th day (immunofluorescence, ×200)

    Figure 9. Positive BNDF expression in the ischemic cortex of each group on the 14th day (immunofluorescence, ×200)

    Table 5. Comparison of the positive VEGF expression in the cerebral ischemic cortex (±s)

    Table 5. Comparison of the positive VEGF expression in the cerebral ischemic cortex (±s)

    Note: VEGF=Vascular endothelial growth factor; compared with the sham-operation group at the same time point, 1) P<0.01; compared with the model group at the same time point, 2) P<0.01; compared with the traditional acupoint group at the same time point, 3)P<0.01; compared with the same group on the 3rd day, 4) P<0.05; compared with the same group on the 7th day, 5) P<0.05

    Grouping F=1 185.13, P<0.01 Time F=249.00, P<0.01 Interaction between grouping and time F=31.14, P<0.01

    Table 6. Comparison of the positive BDNF expression in the cerebral ischemic cortex (±s)

    Table 6. Comparison of the positive BDNF expression in the cerebral ischemic cortex (±s)

    Note: BDNF=Brain-derived neurotrophic factor; compared with the sham-operation group at the same time point1) P<0.01; compared with the model group at the same time point, 2) P<0.01; compared with the traditional acupoint group at the same time point, 3)P<0.01; compared with the same group on the 3rd day, 4) P<0.05; compared with the same group on the 7th day, 5) P<0.05

    Group n 3 d 7 d 14 d Sham-operation 3 0.114±0.003 0.115±0.005 0.111±0.011 Model 3 0.389±0.0181) 0.470±0.0531) 0.438±0.0631)Traditional acupoint 3 0.547±0.0272) 0.794±0.0182)4) 0.635±0.0142)5)Concurrent treatment of the brain and heart 3 0.581±0.0422) 0.829±0.0342)4) 0.797±0.0102)3)4)Grouping F=641.49, P<0.01 Time F=71.09, P<0.01 Interaction between grouping and time F=16.12, P<0.01

    Table 7. Comparison of the VEGF mRNA expression in the cerebral ischemic cortex (x ±s, bp)

    Table 8. Comparison of the BDNF mRNA expression in the cerebral ischemic cortex (±s bp)

    Table 8. Comparison of the BDNF mRNA expression in the cerebral ischemic cortex (±s bp)

    Note: BDNF=Brain-derived neurotrophic factor; compared with the sham-operation group at the same time point, 1) P<0.01;compared with the model group at the same time point, 2) P<0.01; compared with the traditional acupoint group at the same time point, 3) P<0.01; compared with the same group on the 3rd day, 4) P<0.05; compared with the same group on the 7th day, 5) P<0.05

    Group n 3 d 7 d 14 d Sham-operation 6 1.00±0.08 1.02±0.05 1.02±0.06 Model 6 1.21±0.021) 1.33±0.051) 1.25±0.031)Traditional acupoint 6 1.51±0.062) 1.88±0.202)4) 1.44±0.082)4)5)Concurrent treatment of the brain and heart 6 1.55±0.062) 2.08±0.102)3)4) 1.54±0.142)Grouping F=250.23, P<0.01 Time F=65.63, P<0.01 Interaction between grouping and time F=15.17, P<0.01

    3 Discussion

    CIS belongs to the category of “stroke disease” in traditional Chinese medicine, and its pathogenesis includes wind, fire, phlegm, blood stasis, Qi, deficiency,disorders of Zang-Fu organs, Yin-Yang, and flow of Qi-blood, which directly attack the brain and block the cerebral vessel, leading to unconsciousness. Phlegm and blood stasis bind together, blocking the collaterals and subsequently leading to this disease. Researchers have proven that acupuncture-moxibustion in CIS treatment is effective to improve clinical symptoms and reduce disability rate[9]. At present, most scholars believe that repairing or rebuilding the homeostasis of the central nervous system as soon as possible is the key to cerebral ischemia treatment[10]. The neovascularization in the ischemic side and the establishment of collateral circulation contribute to the repair of damaged but not dead neurons in the ischemic penumbra of the brain,thereby playing a positive role in improving neurological function[11]. Therefore, vascular endothelial cell activation, proliferation, and microvascular formation are new ways to promote the recovery of neurological function after stroke.

    Angiogenesis is regulated by many complementary and complex signaling pathways. Among them, VEGF is a highly specific vascular endothelial growth-promoting cytokine that participates in the angiogenesis process of ischemic and hypoxic tissues or organs[12-13]. BDNF is a neurotrophic factor, which is greatly stimulated in the ischemia-hypoxia microenvironment. It can not only protect nerve cells from damage and enhance plasticity,but also regulate the downstream relevant signaling pathways to induce angiogenesis[14-15].

    Although the mechanism of promoting angiogenesis is activated immediately after cerebral ischemia, the body's self-repair ability is limited, and therapeutic angiogenesis can make up for the lack of its own mechanism response. In this experiment, it was found that the expression levels of VEGF and BDNF in the postoperative model group increased, indicating that the expression of VEGF and BDNF increased under the stimulation of ischemia and hypoxia[16]. Since the EA intervention started 4 h after the operation, the two factors’ expression continued to increase, and peaked on the 7th day, suggesting that VEGF and BDNF may play a role in the early and middle stages of cerebral ischemia. EA intervention can up-regulate their expression and advance the expression phase.

    VEGF and BDNF mediate the interaction of blood vessels and nerves, which can be reflected by increased cortical positive CD34 cells and local rCBF. After CIS occurs, CD34 can homing to the cerebral infarction site along with endothelial progenitor cells, differentiate and proliferate into mature endothelial cells to participate in angiogenesis[17]. It is a sensitive factor for detecting angiogenesis[18]. The results of this study showed that the MVD of the model group and the two EA groups were increased with the treatment time and reached the highest on the 14th day in the concurrent treatment of the brain and heart group. The microcirculation of blood in brain tissue was measured by laser Doppler blood flow detector, showing that the rCBF in the model group decreased significantly 5 min after insertion, indicating that the model was successful.On the 3rd day of treatment, there were obvious changes in the rCBF, and during the 14th day of treatment, the rCBF in the two EA groups continued to increase, and the rCBF in the concurrent treatment of the brain and heart group obtained the highest on the 14th day. At the same time, the mNSS of the two EA groups decreased significantly 3 d after the operation.This suggests that the earlier the intervention of acupuncture treatment, the better the effect in promoting angiogenesis after cerebral ischemia, as it can increase the rCBF, reduce the degree of neurological functional impairment, and expand the treatment time window[19]. Moreover, the therapeutic effect within the effective time was continuously accumulated, which is consistent with previous reports[20].

    In this study, guided by the basic principle of“concurrent treatment of the brain and heart”, four acupoints, Fengfu (GV16), Baihui (GV20), Xinshu (BL15)and Neiguan (PC6), were used. This group of acupoints can improve endothelial function and regulate the central activity of hypothalamus[21]. The traditional acupoint group used Shuigou (CV26), Quchi (LI11), Hegu(LI4) and Zusanli (ST36) according to the modern clinical acupuncture treatment for stroke. This study found that compared with the traditional acupoint group, the concurrent treatment of the brain and heart group showed a better improvement in promoting angiogenesis and cortical VEGF and BDNF expression in CIS rats.

    In conclusion, after cerebral ischemia, the body initiates self-healing angiogenesis in the ischemiahypoxic microenvironment. EA therapy can up-regulate the expression levels of VEGF and BDNF in the cortex,release the angiogenesis effect after cerebral ischemia,and play a role in remodeling the neurovascular unit after brain injury. Further, the acupoint combination guided by the theory of “concurrent treatment of the brain and heart” is superior to the traditional acupoint group in promoting angiogenesis.

    Conflict of Interest

    The authors declare that there is no potential conflict of interest in this article.

    Acknowledgments

    This work was supported by Projects of National Natural Science Foundation of China (國家自然科學(xué)基金項目,No. 81373711, No. 81874500); Youth Project of Anhui Provincial Natural Science Foundation of China (安徽省自然科學(xué)研究青年基金項目, No. 1808085QH268); Key Project of Natural Science Research Program in Colleges and Universities in Anhui Province (安徽省高校自然科學(xué)研究項目重點項目, No. KJ2020A0377).

    Statement of Human and Animal Rights

    The treatment of animals conformed to the ethical criteria in this experiment.

    Received: 18 February 2021/Accepted: 10 June 2021

    猜你喜歡
    王玉重點項目國家自然科學(xué)基金
    巧設(shè)體驗活動,助力大孩初中生成長
    常見基金項目的英文名稱(一)
    IPO&并購
    商界評論(2021年4期)2021-06-08 08:10:17
    IPO&并購
    商界評論(2021年3期)2021-05-12 03:29:22
    IPO&并購
    商界評論(2021年2期)2021-04-23 13:17:52
    IPO&并購
    商界評論(2021年1期)2021-03-11 19:52:39
    我校喜獲五項2018年度國家自然科學(xué)基金項目立項
    Computational identifi cation and characterization of microRNAs and their targets inPenaeus monodon*
    徽州方言中的“”
    一顆紅心永向黨中國記憶
    祖國(2017年14期)2017-09-04 13:41:28
    亚洲精品国产av成人精品| 免费高清在线观看日韩| 日韩一本色道免费dvd| 女的被弄到高潮叫床怎么办| 18+在线观看网站| 满18在线观看网站| 亚洲综合色惰| 人妻人人澡人人爽人人| 女的被弄到高潮叫床怎么办| 看十八女毛片水多多多| 亚洲美女视频黄频| 国产免费视频播放在线视频| 久久久久久久国产电影| 久久久久国产网址| 免费在线观看黄色视频的| 国产一区二区 视频在线| 99久国产av精品国产电影| 亚洲图色成人| 国产在线免费精品| 男人操女人黄网站| 亚洲情色 制服丝袜| 亚洲欧美一区二区三区国产| 在线观看免费视频网站a站| 你懂的网址亚洲精品在线观看| 久久久久精品久久久久真实原创| 久久午夜福利片| 亚洲精品国产av蜜桃| 久久久欧美国产精品| 日韩人妻精品一区2区三区| 国产片特级美女逼逼视频| 午夜福利视频在线观看免费| 永久网站在线| 熟女少妇亚洲综合色aaa.| 中文字幕精品免费在线观看视频| 国产精品久久久av美女十八| 午夜福利网站1000一区二区三区| 亚洲内射少妇av| 一本大道久久a久久精品| 乱人伦中国视频| 大香蕉久久网| 少妇人妻久久综合中文| 夜夜骑夜夜射夜夜干| 精品亚洲乱码少妇综合久久| 免费观看av网站的网址| 成人黄色视频免费在线看| 久久影院123| 亚洲精品第二区| 国产成人午夜福利电影在线观看| 大香蕉久久成人网| 免费观看性生交大片5| 97精品久久久久久久久久精品| 超碰成人久久| 亚洲精品久久午夜乱码| 国产高清国产精品国产三级| 欧美bdsm另类| 成人国产麻豆网| av网站在线播放免费| 免费久久久久久久精品成人欧美视频| 国产综合精华液| 亚洲国产欧美网| 丝袜脚勾引网站| 婷婷成人精品国产| 欧美精品高潮呻吟av久久| 国产午夜精品一二区理论片| 日本黄色日本黄色录像| 午夜福利在线观看免费完整高清在| 国产精品国产三级专区第一集| 最新的欧美精品一区二区| 成年av动漫网址| 男男h啪啪无遮挡| 亚洲国产欧美网| 黄网站色视频无遮挡免费观看| 久久久久久免费高清国产稀缺| 黑人巨大精品欧美一区二区蜜桃| 成年女人在线观看亚洲视频| 国产在线免费精品| 美女大奶头黄色视频| 国产极品粉嫩免费观看在线| 亚洲内射少妇av| 黄色毛片三级朝国网站| av女优亚洲男人天堂| 亚洲精品国产av蜜桃| 午夜免费男女啪啪视频观看| 国产在线免费精品| 亚洲av成人精品一二三区| 大片免费播放器 马上看| 天天躁夜夜躁狠狠躁躁| 国产成人精品久久久久久| 日韩中文字幕视频在线看片| 日韩 亚洲 欧美在线| 国产又色又爽无遮挡免| 一区二区三区精品91| 天美传媒精品一区二区| 亚洲精品一区蜜桃| 亚洲经典国产精华液单| 一级片'在线观看视频| 欧美日韩av久久| 久久精品熟女亚洲av麻豆精品| 麻豆av在线久日| 伦理电影免费视频| 丝袜在线中文字幕| 国产在线视频一区二区| 亚洲一级一片aⅴ在线观看| 久久国内精品自在自线图片| 18+在线观看网站| 成人手机av| 午夜免费鲁丝| 精品亚洲成国产av| 最新的欧美精品一区二区| 久久热在线av| 亚洲美女搞黄在线观看| 午夜福利网站1000一区二区三区| 久久久久久久精品精品| 国产亚洲av片在线观看秒播厂| 黄频高清免费视频| 日本猛色少妇xxxxx猛交久久| 一二三四在线观看免费中文在| 国产午夜精品一二区理论片| 久久这里只有精品19| 亚洲欧美清纯卡通| 久久毛片免费看一区二区三区| 亚洲精品久久久久久婷婷小说| 国产精品女同一区二区软件| 女人高潮潮喷娇喘18禁视频| 视频在线观看一区二区三区| 看免费av毛片| 久久久久久久亚洲中文字幕| 国产精品一国产av| 国产片特级美女逼逼视频| 18+在线观看网站| 婷婷色综合大香蕉| 国产精品嫩草影院av在线观看| 久久婷婷青草| 国产欧美日韩综合在线一区二区| 人人澡人人妻人| 亚洲国产欧美日韩在线播放| 国产高清不卡午夜福利| 男女国产视频网站| 高清在线视频一区二区三区| 人成视频在线观看免费观看| 国产成人av激情在线播放| 狠狠精品人妻久久久久久综合| 亚洲人成77777在线视频| 中文字幕色久视频| 啦啦啦啦在线视频资源| 欧美日韩一区二区视频在线观看视频在线| 久久综合国产亚洲精品| 亚洲国产精品国产精品| 人成视频在线观看免费观看| 男男h啪啪无遮挡| 巨乳人妻的诱惑在线观看| 永久免费av网站大全| 亚洲精品国产色婷婷电影| 亚洲精品中文字幕在线视频| 亚洲成色77777| av网站在线播放免费| 日韩中文字幕欧美一区二区 | 免费看av在线观看网站| 国产男女超爽视频在线观看| 青青草视频在线视频观看| 丝袜在线中文字幕| 满18在线观看网站| 国产免费视频播放在线视频| 另类亚洲欧美激情| 国产一区二区在线观看av| 亚洲一区中文字幕在线| videosex国产| 2018国产大陆天天弄谢| 自线自在国产av| 亚洲欧美精品自产自拍| 久久久久久久精品精品| 精品视频人人做人人爽| 亚洲av成人精品一二三区| a级毛片黄视频| 亚洲,欧美精品.| 搡女人真爽免费视频火全软件| 免费日韩欧美在线观看| 国产成人一区二区在线| 色吧在线观看| 老汉色∧v一级毛片| 欧美激情高清一区二区三区 | 韩国av在线不卡| 女人久久www免费人成看片| 日韩制服骚丝袜av| 建设人人有责人人尽责人人享有的| 欧美人与善性xxx| 菩萨蛮人人尽说江南好唐韦庄| 曰老女人黄片| 伦理电影大哥的女人| 777米奇影视久久| 日韩中文字幕欧美一区二区 | 黄色配什么色好看| 日本猛色少妇xxxxx猛交久久| 久久久久久久大尺度免费视频| av.在线天堂| 青春草亚洲视频在线观看| 韩国精品一区二区三区| 欧美日韩成人在线一区二区| 一区二区三区乱码不卡18| 久久毛片免费看一区二区三区| 搡女人真爽免费视频火全软件| 97人妻天天添夜夜摸| 欧美日本中文国产一区发布| 亚洲欧洲精品一区二区精品久久久 | 美国免费a级毛片| 18+在线观看网站| 色婷婷av一区二区三区视频| 亚洲av综合色区一区| 熟女电影av网| 校园人妻丝袜中文字幕| 午夜影院在线不卡| 久久久精品国产亚洲av高清涩受| 亚洲精品中文字幕在线视频| 亚洲精品自拍成人| 2021少妇久久久久久久久久久| 欧美老熟妇乱子伦牲交| 国产成人精品婷婷| 亚洲av在线观看美女高潮| a级毛片在线看网站| 丝袜美足系列| 老汉色av国产亚洲站长工具| 国产精品一区二区在线不卡| 97在线人人人人妻| 最新中文字幕久久久久| 亚洲五月色婷婷综合| 亚洲成色77777| 国产精品一区二区在线不卡| 国产精品香港三级国产av潘金莲 | 黄片无遮挡物在线观看| 9热在线视频观看99| 岛国毛片在线播放| 激情五月婷婷亚洲| 青春草视频在线免费观看| 免费在线观看黄色视频的| 亚洲欧美一区二区三区国产| 亚洲中文av在线| 少妇人妻久久综合中文| 女人久久www免费人成看片| 老汉色av国产亚洲站长工具| 看十八女毛片水多多多| 亚洲成国产人片在线观看| 中文乱码字字幕精品一区二区三区| 亚洲国产精品999| 两性夫妻黄色片| 色播在线永久视频| 国产日韩欧美在线精品| 国产女主播在线喷水免费视频网站| 熟女少妇亚洲综合色aaa.| 久久久精品区二区三区| 人人妻人人澡人人爽人人夜夜| 国产成人精品婷婷| 亚洲欧美精品综合一区二区三区 | 亚洲欧美成人精品一区二区| 日韩一本色道免费dvd| av天堂久久9| 人妻少妇偷人精品九色| 在线亚洲精品国产二区图片欧美| 成人免费观看视频高清| 国产熟女欧美一区二区| 日韩伦理黄色片| 男女边吃奶边做爰视频| 国语对白做爰xxxⅹ性视频网站| 久久狼人影院| 香蕉国产在线看| 最近手机中文字幕大全| 国产精品香港三级国产av潘金莲 | 精品亚洲乱码少妇综合久久| 亚洲国产日韩一区二区| av片东京热男人的天堂| 亚洲国产精品成人久久小说| 涩涩av久久男人的天堂| 免费女性裸体啪啪无遮挡网站| 国产日韩一区二区三区精品不卡| 亚洲图色成人| freevideosex欧美| 婷婷色综合www| a级片在线免费高清观看视频| 少妇被粗大猛烈的视频| 久久久久久久久免费视频了| 久久久精品区二区三区| 亚洲成人av在线免费| 777米奇影视久久| 久久久久国产精品人妻一区二区| 捣出白浆h1v1| 69精品国产乱码久久久| 大片免费播放器 马上看| 国产淫语在线视频| 狠狠婷婷综合久久久久久88av| 两性夫妻黄色片| 国产免费视频播放在线视频| 天天影视国产精品| 男女下面插进去视频免费观看| 国产精品亚洲av一区麻豆 | 亚洲情色 制服丝袜| 大片免费播放器 马上看| 91成人精品电影| 在线看a的网站| 超碰97精品在线观看| 国产成人精品一,二区| 亚洲精品日韩在线中文字幕| 亚洲欧洲精品一区二区精品久久久 | 永久网站在线| 亚洲内射少妇av| 国产在视频线精品| 亚洲第一av免费看| 国产精品无大码| 亚洲欧美清纯卡通| 成人午夜精彩视频在线观看| 亚洲国产精品一区二区三区在线| 国产精品欧美亚洲77777| 999精品在线视频| 亚洲人成77777在线视频| 一级毛片电影观看| 一本久久精品| 高清在线视频一区二区三区| 免费观看在线日韩| 少妇人妻 视频| 国产亚洲一区二区精品| 成年美女黄网站色视频大全免费| 两个人看的免费小视频| 国产精品久久久久久久久免| 亚洲人成77777在线视频| 精品久久蜜臀av无| 国产精品久久久久久久久免| 天天操日日干夜夜撸| 校园人妻丝袜中文字幕| 最近手机中文字幕大全| 天天躁狠狠躁夜夜躁狠狠躁| 精品人妻偷拍中文字幕| 亚洲欧洲日产国产| av电影中文网址| 久久午夜综合久久蜜桃| 亚洲精品在线美女| 色网站视频免费| 久久久久视频综合| 国产精品嫩草影院av在线观看| 久久久精品区二区三区| 日韩一区二区视频免费看| 这个男人来自地球电影免费观看 | videos熟女内射| 久久免费观看电影| 亚洲,一卡二卡三卡| 国产日韩欧美亚洲二区| 在线精品无人区一区二区三| 十分钟在线观看高清视频www| 激情视频va一区二区三区| 免费女性裸体啪啪无遮挡网站| 成人漫画全彩无遮挡| 97在线人人人人妻| 日本av免费视频播放| 亚洲精品国产av成人精品| 午夜免费男女啪啪视频观看| 哪个播放器可以免费观看大片| 美女福利国产在线| 在线观看人妻少妇| 中文字幕人妻熟女乱码| 秋霞在线观看毛片| 中文字幕人妻丝袜制服| 夫妻午夜视频| 女的被弄到高潮叫床怎么办| 久久人妻熟女aⅴ| 一级毛片电影观看| 97在线人人人人妻| 美女主播在线视频| 观看美女的网站| 亚洲精品第二区| 国产男女超爽视频在线观看| 男女高潮啪啪啪动态图| 国产精品麻豆人妻色哟哟久久| 黄片无遮挡物在线观看| 不卡av一区二区三区| 18禁国产床啪视频网站| 777米奇影视久久| 国产亚洲一区二区精品| 国产福利在线免费观看视频| 日日爽夜夜爽网站| 亚洲精华国产精华液的使用体验| 国产极品天堂在线| 精品少妇久久久久久888优播| 亚洲国产毛片av蜜桃av| 成人黄色视频免费在线看| 亚洲精品第二区| 波野结衣二区三区在线| 亚洲av福利一区| 丰满少妇做爰视频| 中文字幕人妻丝袜一区二区 | www.熟女人妻精品国产| 亚洲国产毛片av蜜桃av| 女人久久www免费人成看片| 国产精品欧美亚洲77777| 欧美精品亚洲一区二区| 久久鲁丝午夜福利片| 综合色丁香网| 亚洲三级黄色毛片| 亚洲一级一片aⅴ在线观看| 一级a爱视频在线免费观看| 国产成人一区二区在线| 午夜久久久在线观看| 新久久久久国产一级毛片| 少妇被粗大猛烈的视频| 午夜激情av网站| 宅男免费午夜| 亚洲欧洲国产日韩| 少妇人妻精品综合一区二区| 最近中文字幕2019免费版| 国产精品久久久久久av不卡| 午夜福利,免费看| 国产亚洲午夜精品一区二区久久| 欧美日韩亚洲高清精品| 波野结衣二区三区在线| 久久精品久久精品一区二区三区| 久热这里只有精品99| 中国三级夫妇交换| 中文字幕制服av| 久久精品亚洲av国产电影网| 啦啦啦视频在线资源免费观看| 国产精品香港三级国产av潘金莲 | 熟女av电影| 中文精品一卡2卡3卡4更新| 国产一区有黄有色的免费视频| 久久久久精品久久久久真实原创| 啦啦啦啦在线视频资源| 亚洲精品,欧美精品| 国产成人aa在线观看| 大陆偷拍与自拍| 一二三四中文在线观看免费高清| 久热这里只有精品99| av免费在线看不卡| 麻豆精品久久久久久蜜桃| 成年美女黄网站色视频大全免费| 色播在线永久视频| 精品少妇黑人巨大在线播放| 激情五月婷婷亚洲| 美女午夜性视频免费| 少妇被粗大猛烈的视频| 久久久精品区二区三区| 美女脱内裤让男人舔精品视频| av国产久精品久网站免费入址| 不卡视频在线观看欧美| 男女国产视频网站| 日韩一区二区视频免费看| 亚洲美女视频黄频| 狠狠精品人妻久久久久久综合| 超碰97精品在线观看| 边亲边吃奶的免费视频| www日本在线高清视频| 国产精品.久久久| 人人澡人人妻人| 国产免费又黄又爽又色| 街头女战士在线观看网站| 寂寞人妻少妇视频99o| 69精品国产乱码久久久| 国产成人aa在线观看| 中文字幕人妻丝袜制服| 啦啦啦中文免费视频观看日本| 极品少妇高潮喷水抽搐| 久久久久精品久久久久真实原创| 三级国产精品片| 伊人亚洲综合成人网| 国产老妇伦熟女老妇高清| 岛国毛片在线播放| 少妇猛男粗大的猛烈进出视频| 在线精品无人区一区二区三| 多毛熟女@视频| 精品一区二区三卡| 国产精品一国产av| 天堂俺去俺来也www色官网| 国产免费福利视频在线观看| 最近手机中文字幕大全| 黑丝袜美女国产一区| 中文字幕av电影在线播放| 久久久欧美国产精品| 国产成人精品婷婷| 久久这里有精品视频免费| 欧美精品国产亚洲| 国产淫语在线视频| 视频区图区小说| 久久精品久久久久久久性| 天天躁夜夜躁狠狠久久av| 国产av国产精品国产| 国产免费现黄频在线看| 国产精品免费大片| 精品亚洲成国产av| 欧美日韩一级在线毛片| 在线观看www视频免费| 69精品国产乱码久久久| 日韩中文字幕欧美一区二区 | 久久精品久久久久久久性| 99国产综合亚洲精品| 精品少妇久久久久久888优播| 巨乳人妻的诱惑在线观看| 国产激情久久老熟女| 久久毛片免费看一区二区三区| 国产精品一区二区在线不卡| 久久亚洲国产成人精品v| 国产亚洲最大av| 日韩欧美一区视频在线观看| 777米奇影视久久| 美女中出高潮动态图| 欧美人与性动交α欧美精品济南到 | 高清不卡的av网站| 久久精品aⅴ一区二区三区四区 | 欧美日韩av久久| 你懂的网址亚洲精品在线观看| 好男人视频免费观看在线| 久久精品国产亚洲av涩爱| 黄片播放在线免费| 男女无遮挡免费网站观看| 十分钟在线观看高清视频www| 黑人巨大精品欧美一区二区蜜桃| 国产精品一国产av| 亚洲av综合色区一区| 午夜日本视频在线| 在线 av 中文字幕| 人体艺术视频欧美日本| 男男h啪啪无遮挡| 女人久久www免费人成看片| 最近中文字幕高清免费大全6| 亚洲国产精品999| 制服人妻中文乱码| kizo精华| 亚洲情色 制服丝袜| 日本黄色日本黄色录像| 久久精品久久精品一区二区三区| 中文字幕人妻丝袜一区二区 | 人人妻人人添人人爽欧美一区卜| 91精品三级在线观看| 亚洲精品久久午夜乱码| 久久鲁丝午夜福利片| 久久99热这里只频精品6学生| 欧美黄色片欧美黄色片| 在线观看美女被高潮喷水网站| 欧美激情 高清一区二区三区| 国产高清国产精品国产三级| 国产成人午夜福利电影在线观看| 国产亚洲午夜精品一区二区久久| 午夜福利一区二区在线看| 男女边吃奶边做爰视频| 少妇的逼水好多| 91久久精品国产一区二区三区| 精品人妻在线不人妻| av天堂久久9| 黄片小视频在线播放| 国产精品一区二区在线不卡| 午夜免费男女啪啪视频观看| 男女国产视频网站| 在线观看免费视频网站a站| 一边亲一边摸免费视频| 国产色婷婷99| 国产一区亚洲一区在线观看| 伊人久久国产一区二区| 国产精品亚洲av一区麻豆 | 亚洲第一av免费看| 可以免费在线观看a视频的电影网站 | 亚洲国产精品成人久久小说| 久久99一区二区三区| av不卡在线播放| 叶爱在线成人免费视频播放| 咕卡用的链子| 狠狠婷婷综合久久久久久88av| 日本欧美国产在线视频| 老鸭窝网址在线观看| 国产精品一二三区在线看| 汤姆久久久久久久影院中文字幕| 欧美成人午夜精品| 日韩伦理黄色片| 精品亚洲成国产av| 亚洲av.av天堂| 国产爽快片一区二区三区| 91aial.com中文字幕在线观看| 老汉色∧v一级毛片| 精品一区二区三区四区五区乱码 | 亚洲精品,欧美精品| 熟妇人妻不卡中文字幕| 美女国产视频在线观看| 国产色婷婷99| 国产片内射在线| 18禁国产床啪视频网站| 成人漫画全彩无遮挡| 国产一区二区三区综合在线观看| 精品少妇久久久久久888优播| 岛国毛片在线播放| 好男人视频免费观看在线| 美女脱内裤让男人舔精品视频| 最近手机中文字幕大全| 永久免费av网站大全| 一级a爱视频在线免费观看| 哪个播放器可以免费观看大片| 九九爱精品视频在线观看| 亚洲一级一片aⅴ在线观看| 免费少妇av软件| 色哟哟·www| a级片在线免费高清观看视频| 久久99热这里只频精品6学生| 精品酒店卫生间| 亚洲精品国产av成人精品| 国产女主播在线喷水免费视频网站| 在线免费观看不下载黄p国产| 日本av免费视频播放| 国产一级毛片在线| 久久久久久伊人网av| 午夜福利乱码中文字幕| 久久久久久久精品精品| 色网站视频免费| 国产 精品1| 久久99蜜桃精品久久| 免费黄网站久久成人精品| 国产男人的电影天堂91| 日韩在线高清观看一区二区三区| 色播在线永久视频| 黄频高清免费视频| 欧美成人午夜精品| 国产一区二区在线观看av| 涩涩av久久男人的天堂| 色哟哟·www|