Effects of breastfeeding on immune response of CD4+T lymphocytes in infants / 中国儿童保健杂志

【Objective】 To explore the effects of breastfeeding on the immune response of CD4+T lymphocytes in infants in non-inflammatory state, and to analyze the immunomodulatory significance of the whole composition of breast milk. 【Methods】 A retrospective cohort study was conducted. From January to September 2022, six-month-old infants who took physical examination in the Child Healthcare Department of Changzhou Children′s Hospital Affiliated to Nantong University, were selected based on inclusion criteria, and were divided into breastfeeding group (n=33) and formula feeding group (n=27) based on their feeding patterns. Flow cytometry was used to detect the percentage of CD4+ T cells, including helper T cell (Th) 1, Th2, Th17, regulatory T cell (Treg), and the levels of related cytokines interleukin (IL)-2, IL-4, IL-6, IL-10, tumor necrosis factor (TNF)-α, interferon (IFN)-γ, IL-17 in peripheral blood. The differences in these indicators between the two groups were compared. 【Results】 Compared with the formula feeding group, the breastfeeding group showed significantly higher percentages of Th1(t=3.038), Treg (t=2.088). The ratio of Th1 to Th2(Z=2.756), IL-10(Z=2.297) and IFN-γ (Z=2.076) in the peripheral blood of the breastfeeding group were also significantly higher. Conversely, the breastfeeding group had significantly lower percentage of Th17(Z=2.704) and IL-17A (t=2.187) (P<0.05). There was no significant difference the percentage of Th2, as well as in the levels of IL-2, IL-4, IL-6 and TNF-α between the two groups (P>0.05). 【Conclusions】 Breastfeeding has a regulatory effect on the immune response of infant CD4+ T lymphocytes. It promotes the development of Th1/Th2 towards Th1 and the immunomodulatory effect of Treg. Moreover, it inhibits the Th17 type immune response. These findings suggest that the complete composition of breast milk contributes to the development and maturation of infant immune system, enhancing immune defense and immune tolerance.

Mori Folium Improves Glucose and Lipid Metabolism Disorders in Rats with Type 2 Diabetes Mellitus by Regulating PI3K/Akt/PPARα/CPT-1 Pathway / 中国实验方剂学杂志

ObjectiveTo investigate the effect and mechanism of Mori Folium extract on the glucose and lipid metabolism disorders in the liver of rats with type 2 diabetes mellitus （T2DM） through the phosphatidylinositol 3-kinase/protein kinase B/peroxisome proliferation-activated receptor α/carnitine palmitoyl transferase-1 （PI3K/Akt/PPARα/CPT-1） signaling pathway. MethodThe T2DM model was induced by the high-fat diet combined with the intraperitoneal injection of streptozotocin （STZ）. The model rats were randomly divided into a model group， a metformin （0.2 g·kg-1） group， and a Mori Folium water extract （4.0 g·kg-1） group according to blood glucose and body weight. In the 8-week administration， fasting blood glucose was measured at the same time every week. The histomorphological and fat changes in the rat liver were observed by hematoxylin-eosin （HE） staining and oil red O staining. The levels of total cholesterol （TC）， triglyceride （TG）， low-density lipoprotein cholesterol （LDL-C）， high-density lipoprotein cholesterol （HDL-C）， alanine aminotransferase （ALT）， and aspartate aminotransferase （AST） in the serum were measured by biochemical methods. Western blot （WB） was used to quantitatively detect the protein expression of p-PI3K，PI3K，p-Akt，Akt，PPARα，and CPT-1 in the rat liver. ResultAfter 8-week administration， the blood glucose of rats was higher in the model group than that in the control group （P<0.01）， and lower in the Mori Folium water extract group than that in the model group （P<0.01）. The results of HE staining showed that the liver tissue structure of the control group was complete， and the hepatocytes were arranged radially around the central vein， while the hepatocyte injury in the model group was obvious. Compared with the model group， the Mori Folium water extract group showed improved vacuolar degeneration and no lesions such as small bile duct hyperplasia. Oil red O staining showed that there was no obvious steatosis and necrosis in the hepatocytes of rats in the control group， and no lipid droplets in the hepatocytes were observed， while the model group showed increased lipid droplets. Mori Folium significantly reduced the lipid droplets in the liver. Biochemical analysis showed that the levels of TC， TG， LDL-C， AST， and ALT in the model group were significantly higher than those in control group （P<0.01）. The levels of TC， TG， LDL-C， AST， and ALT in the Mori Folium water extract group were significantly lower than those in the model group （P<0.05，P<0.01）. WB showed that the protein expression of p-PI3K/PI3K， p-Akt/Akt， PPARα， and CPT-1 in the model group were lower than those in the control group （P<0.01）. Mori Folium water extract could increase the protein expression of p-PI3K/PI3K， p-Akt/Akt， PPARα， and CPT-1 （P<0.05 or P<0.01）. ConclusionThe hypoglycemic mechanism of Mori Folium water extract may be related to the regulation of the PI3K/Akt/PPARα/CPT-1 signaling pathway.

Independent risk factors related to acute respiratory distress syndrome after acute type A aortic dissection surgery: A retrospective analysis / 中国胸心血管外科临床杂志

@#Objective    To investigate the independent risk factors associated with postoperative acute respiratory distress syndrome in patients undergoing type A aortic dissection surgery. Methods    The clinical data of 147 patients who underwent acute type A aortic dissection surgery in the First Affiliated Hospital of Anhui Medical University from 2015 to 2019 were retrospectively analyzed. There were 110 males at age of 51.9±10.1 years and 37 females at age of 54.3±11.1 years. According to whether the patients developed ARDS after surgery, all of the patients were divided into a ARDS group or a non-ARDS group. Logistic regress analysis was utilized to establish the predictive mode to identify the independent risk factors related to ARDS. Results    Of the patients, 25 developed postoperative ARDS. Among them, 5 patients were mild ARDS, 13 patients were moderate, and 7 patients were severe ARDS. Multivariate logistic regression analysis showed that deep hypothermic circulatory arrest time [odds ratio (OR)=1.067, 95% confidence interval (CI) 1.014-1.124, P=0.013], cardiopulmonary bypass time (OR=1.012, 95%CI 1.001-1.022, P=0.027) and perioperative plasma input (OR=1.001, 95%CI 1.000-1.002, P=0.011) were independently associated with ARDS in patients undergoing acute A aortic dissection surgery. Receiver operating characteristic (ROC) curve analysis demonstrated a good discrimination ability of the logistic regression model, with an area under the curve of 0.835 (95%CI 0.740-0.929, P=0.000). Conclusion    Duration of deep hypothermic circulatory arrest, cardiopulmonary bypass time and perioperative plasma are independent risk factors for postoperative ARDS in patients undergoing type A aortic dissection surgery.

Chronic kidney disease after adrenalectomy in a patient with primary aldosteronism / 北京大学学报(医学版)

We report one case of estimated glomerular filtration rate (eGFR) decline after taking unilateral adrenalectomy due to aldosterone adenoma. A 60-year-old male with 23-year history of hypertension was reported to the endocrinologist due to hypokalemia (serum potassium 3.01 mmol/L). Urine microalbumin/creatinine (ALB/CR) was 70.15 mg/g, serum creatinine was 82 μmol/L and eGFR was 89.79 mL/(min·1.73 m2). Random serum aldosterone was 172.2-203.5 ng/L, and random plasma rennin activity was 0-0.17 μg/(L·h). His captopril challenge test suggested that his aldosterone le-vels were suppressed by 8% (< 30%) and the adrenal enhanced computed tomography scan revealed a left adrenal tumor. The patient was diagnosed with primary hyperaldosteronism (PA), aldosterone adenoma and underwent left laparoscopic adrenalectomy. Histological examination confirmed adrenal cortical adenoma. One week after the operation, his serum creatinine was increased to 127 μmol/L compared with preoperative level; eGFR was 32.34 mL/(min·1.73 m2). His systolic blood pressure (SBP) was 110 mmHg and diastolic blood pressure (DBP) was 60 mmHg (hypotensive drugs discontinued), and serum potassium level was 5.22 mmol/L. At the end of the 2-year follow up, the serum creatinine of this patient remained at 109-158 μmol/L and eGFR fluctuated from 63.28-40.12 mL/(min·1.73 m2). PA is one of the most common causes of secondary hypertension. Several studies have reported renal function deterioration of PA patients after unilateral adrenalectomy, like the patient in this article. Age, preoperative plasma aldosterone concentration, albuminuria and preoperative potassium level might be significant predictors of a decrease in the eGFR. Growing evidence suggests that aldosterone could contribute to structural kidney damage, arterial injury and hemodynamic disorder. At the same time, patients with PA exhibit glomerular hyperfiltration and glomerular vascular hypertension, leading to the misinterpretation of renal function in PA patients as subtle kidney damage may be masked by the glomerular hyperfiltration before treatment. After a unilateral adrenalectomy, glomerular hyperfiltration by aldosterone excess is resolved and renal damage can be unmasked. In conclusion, kidney function deterioration after adrenalectomy can be detected in some patients with PA. Thus, accurate evaluation of kidney function in patients with PA may be essential, especially for those with preoperative risk factors for postoperative renal impairment. After unilateral adrenalectomy, close monitoring of renal function and adequate management are required for PA patients.

Effect of percutaneous internal fixation of anterior inferior iliac spine for pelvic fractures / 中华创伤杂志

Objective:To compare the efficacy of internal fixation and external fixation in the treatment of pelvic fractures.Methods:A retrospective case control study was conducted to analyze the data of 66 patients with anterior pelvic ring fracture treated from December 2015 to December 2017 at First People's Hospital of Lianyungang, including 36 males and 30 females, with an average age of 42.7 years (range, 19 to 63 years). There were 36 patients with Tile type B fractures and 30 with Tile type C fractures. Minimally invasive percutaneous internal fixation through the anterior inferior iliac spine was performed in 33 patients (internal fixation group) and external fixator was employed in another 33 patients (external fixation group). The two groups were compared in terms of the operation time, intraoperative blood loss, fracture healing time, fracture reduction assessment with Matta criteria, Majeed score and surgical complications.Results:All patients were followed up for 9-24 months (mean, 14.5 months). The operation time was (33.7±3.6)minutes in internal fixation group , and (24.5±3.5)minutes in external fixation group ( P<0.05). Intraoperative blood loss was (25.8±3.3)ml in internal fixation group and (21.8±4.3)ml in external fixation group ( P<0.05). The fractures were healed acceptably, with the healing time of (13.8±1.6)weeks in internal fixation group and (21.7±1.9)weeks in external fixation group ( P< 0.05). According to the Matta criteria, internal fixation group showed excellent results in 17 patients, good in 14, fair in 2 and poor in 0, with the excellent and good rate of 94%; external fixation group showed excellent results in 14 patients, good in 12, fair in 6 and poor in 1 , with the excellent and good rate of 79% ( P>0.05). For Majeed function score, the results in internal fixation group were excellent in 18 patients, good in 13, fair in 2 and poor in 0, with the excellent and good of 94%; the results in external fixation group were excellent in 14 patients, good in 12, fair in 7 and poor in 0, with the excellent and good of 79% ( P>0.05). After operation, frequent urinary occurred in one patient, unilateral femoral nerve partial paralysis in one, nail cap stimulation in two and incisional redness, swelling and exudation in one in internal fixation group. In external fixation group, there were 5 patients with nail rod exudation. Conclusion:Compared with the external fixator, the internal fixation for pelvic fractures is less invasive and more reliable, can accelerate fracture healing without interfering with the patient's daily life, and can be used as the final fixation.

Advances in Bioculture Technology of Bupleuri Radix and Biosynthesis Pathways of Saikosaponins / 中国实验方剂学杂志

Synthetic biology is an emerging discipline that analyzes the biosynthesis pathways of active constituents in traditional Chinese medicine and explores genes involved in biosynthesis. Bupleuri Radix is one of the most commonly used Chinese medicinal materials with remarkable medicinal value, its index component is saikosaponins, which has significant anti-inflammatory, anti-viral and anti-tumor activities. However, the current wild resources of Bupleuri Radix have been destroyed, and there were some problems in the process of artificial cultivation. The application of biological culture technology and synthetic biology can expand the sources of saikosaponins and protect resources of Bupleuri Radix. The culture conditions of different plants can be followed without a fixed pattern, and the biosynthetic pathways of different medicinal active ingredients are also inconsistent. At present, there is no review report on the culture technology of Bupleuri Radix and the research on the biosynthesis pathway of saikosaponins. This paper introduces the research progress of biological culture techniques, such as callus culture, adventitious root culture, hairy root culture and suspension cell culture used in synthetic biology, and the biosynthesis pathway of saikosaponins and its key enzyme functional genes. It is suggested to optimize the biological culture technology of Bupleuri Radix by referring to the tissue culture technology of other traditional root medicinal materials, so as to provide a reference for the in-depth study on the biosynthesis pathway and metabolic regulation of saikosaponins.

Cement leakage factors in clinical vertebroplasty / 中国组织工程研究

BACKGROUND: Vertebroplasty (PVP) and kyphoplasty (PKP) are important methods for the treatment of osteoporotic vertebral compression fractures in the elderly. Although bone cement has certain liquidity and vertebral fractures are often in different situations, bone cement leakage rate is still high. OBJECTIVE: Based on the theoretical discussion and clinical analysis, to study the theoretical causes of bone cement leakage and effective prevention methods. METHODS: A total of 162 cases (186 vertebrae) were treated with three methods of vertebroplasty. Group A: 64 cases with 78 vertebrae were treated with conventional cemented vertebroplasty; Group B: 57 cases with 65 vertebrae were treated with cemented vertebroplasty using cement pump; Group C: 41 cases with 43 vertebrae were treated with balloon kyphoplasty. The leakage of bone cement was observed in three groups. RESULTS AND CONCLUSION: Of the 186 vertebrae, postoperative bone cement leakage occurred in 25 vertebrae, with the leakage rate of 13% (25/186). Group A had bone cement leakage in 11 vertebrae, and the leakage rate was 14% (11/78). Group B had bone cement leakage in 8 vertebrae, and the leakage rate was 12% (8/65). Group C had bone cement leakage in 6 vertebrae, and the leakage rate was 14% (6/43). There was no significant difference among the three groups in the leakage rate of bone cement (P > 0.05). That is to say, the causes of bone cement leakage are not completely controllable, and the leakage position has some randomness. Strict and careful imaging monitoring is an intuitive method to prevent bone cement leakage.

Cement leakage factors in clinical vertebroplasty / 中国组织工程研究

BACKGROUND: Vertebroplasty (PVP) and kyphoplasty (PKP) are important methods for the treatment of osteoporotic vertebral compression fractures in the elderly. Although bone cement has certain liquidity and vertebral fractures are often in different situations, bone cement leakage rate is still high. OBJECTIVE: Based on the theoretical discussion and clinical analysis, to study the theoretical causes of bone cement leakage and effective prevention methods. METHODS: A total of 162 cases (186 vertebrae) were treated with three methods of vertebroplasty. Group A: 64 cases with 78 vertebrae were treated with conventional cemented vertebroplasty; Group B: 57 cases with 65 vertebrae were treated with cemented vertebroplasty using cement pump; Group C: 41 cases with 43 vertebrae were treated with balloon kyphoplasty. The leakage of bone cement was observed in three groups. RESULTS AND CONCLUSION: Of the 186 vertebrae, postoperative bone cement leakage occurred in 25 vertebrae, with the leakage rate of 13% (25/186). Group A had bone cement leakage in 11 vertebrae, and the leakage rate was 14% (11/78). Group B had bone cement leakage in 8 vertebrae, and the leakage rate was 12% (8/65). Group C had bone cement leakage in 6 vertebrae, and the leakage rate was 14% (6/43). There was no significant difference among the three groups in the leakage rate of bone cement (P > 0.05). That is to say, the causes of bone cement leakage are not completely controllable, and the leakage position has some randomness. Strict and careful imaging monitoring is an intuitive method to prevent bone cement leakage.

Phase Ⅱ clinical study of paclitaxel and cisplatin combined with concurrent radiotherapy in the treatment of locally advanced esophageal squamous cell carcinoma / 国际肿瘤学杂志

Objective To study the phase Ⅱ clinical efficacy of paclitaxel and cisplatin combined with concurrent radiotherapy in the treatment of locally advanced esophageal squamous cell carcinoma.Methods Sixty-three cases of locally advanced esophageal squamous cell carcinoma patients were selected from January 2014 to January 2016 in our hospital.All patients were randomly divided into the study group (32 cases) and control group (31 cases) according to random number table method.All patients were treated with three-dimensional conformal radiotherapy,the control group was treated with 5-fluorouracil and cisplatin,and study group was treated with paclitaxel combined with cisplatin,21 days for a course of treatment,continuous 2 cycles of chemotherapy.The therapeutic effects and adverse reactions of the two groups of patients were evaluated.The levels of tumor markers such as carcino embryonic antigen (CEA),CA125 and CA50 were detected in the two groups before and after chemotherapy.The patients were followed up,and the survival rates were recorded.Results The effective rate of the patients in the study group was 93.75％,higher than that of the control group (74.19％,x2 =4.510,P =0.034).Compared with the control group,the radiation esophagitis (Z =2.076,P =0.038),neurotoxicity (Z =3.806,P ＜ 0.001),gastrointestinal reactions (Z =2.374,P =0.018),leukopenia (Z =1.979,P =0.048) were significantly lighter in the study group.After chemotherapy,the levels of CEA,CA125,CA50 of study group and control group were significantly lower than those before chemotherapy (all P ＜ 0.05),and the levels of study group after chemotherapy were significantly lower than those of the control group (all P ＜ 0.05).The 1-year survival rate of the patients in the study group was 90.63％,which was significantly higher than that in the control group (70.97％),and the difference was statistically significant (x2 =4.287,P =0.038).Conclusion Paclitaxel and cisplatin combined with concurrent radiotherapy can improve the phase Ⅱ therapeutic effect of locally advanced esophageal squamous cell carcinoma,the toxicity of chemotherapy in patients is low,effectively improve the short-term survival rate,with better clinical value.

Simultaneous determination of five anthraquinones in a Chinese traditional preparation by RP-HPLC using an improved extraction procedure / 中西医结合学报

<p><b>OBJECTIVE</b>The stable quality of Chinese herbal medicines is a critical factor for their reliable clinical efficiency. An improved liquid-liquid extraction procedure and a liquid chromatographic method were developed to simultaneously analyze five anthraquinones (aloe-emodin, rhein, emodin, chrysophanol and physcion) in a Chinese traditional hospital preparation, Fuyankang mixture, in order to quantitatively control its quality in a more effective way.</p><p><b>METHODS</b>A more economical and repeatable extraction procedure based on conventional liquid-liquid extraction technique was developed and used to extract five marker components in Fuyankang mixture. These anthraquinones were separated in less than 20 min on a C18 column with methanol and 0.1% phosphoric acid (88:12, v/v) as mobile phase. The method was validated for specificity, precision, spiked recovery and stability.</p><p><b>RESULTS</b>Compared to conventional liquid-liquid extraction, the improved liquid-liquid extraction was found to be more effective for simultaneous extraction of anthraquinones from an aqueous Chinese herbal preparation, especially for hydrophobic compounds. The improved extraction method was successfully applied to determine the content of five marker components in Fuyankang mixture by the means of reverse phase high-performance liquid chromatography.</p><p><b>CONCLUSION</b>The improved extraction procedure may be suitable for routine quality control of Fuyankang mixture and other traditional preparations at city-level hospitals in China.</p>

Hippocampus quinolinic acid modulates glutamate and NMDAR/mGluR1 in chronic unpredictable mild stress-induced depression / 生理学报

The present study was to investigate the role of the quinolinic acid (QUIN) and its relationship with N-methyl-D-aspartic acid (NMDA) receptor and metabotropic glutamate receptor 1 (mGluR1) in depression induced by chronic unpredictable mild stress (CUMS) in hippocampus. CUMS-induced depression model was established in Sprague-Dawley rats. Intrahippocampal injections of QUIN, QUIN antagonist Ro61-8048, non-competitive NMDA receptor antagonist MK-801 and mGluR1 antagonist AIDA were respectively adopted by rat brain stereotaxic coordinates. The behavioral observations were conducted by measurement of weight changes, sucrose preference test, open-field test and tail suspension test. The concentration of glutamic acid (Glu) and the expression of its receptor subunits in hippocampus were detected by HPLC and Western blot, respectively. The QUIN content in hippocampus was determined by enzyme linked immunosorbent assay (ELISA). The result showed that CUMS significantly induced the depressive-like behaviors in rats, increased the contents of QUIN and Glu, and upregulated the expression of NMDA receptor subunits NR2B and mGluR1 in hippocampus. Microinjection of QUIN into hippocampus resulted in animal depressive-like behaviors, and increased the content of Glu and the expression of NR2B and mGluR1 significantly. QUIN antagonist Ro61-8048 effectively restrained the depression-like behaviors induced by CUMS, and decreased the content of Glu and the expression of NR2B and mGluR1 significantly. Intrahippocampal injections of MK-801 and AIDA effectively improved the depression-like behaviors induced by CUMS and decreased the Glu content. The results suggest that CUMS may contribute to the production and release of QUIN in hippocampal microglia. QUIN results in elevation of Glu level via NMDA receptor and mGluR1, and the increase of expression of NR2B and mGluR1 in hippocampus, which leads to depression-like behaviors in the end.

Modulation of hippocampal glutamate and NMDA/AMPA receptor by homocysteine in chronic unpredictable mild stress-induced rat depression / 生理学报

The study was to investigate the role of homocysteine (Hcy) which was released by hippocampal glial cells and its relationship with NMDA receptor and AMPA receptor in depression induced by chronic unpredictable mild stress (CUMS), and explore the mechanism of changes of Glu/Glu receptor in glial cells and neurons. CUMS-induced depression model was established. The body weight of rats was weighed on the 1st, 7th, 14th, and 21st days during the experiment. The behavioral performances were observed by means of sucrose consumption test, open field test and tail suspension test. Intrahippocampal microinjection of Hcy, NMDA receptor antagonist MK-801 and AMPA receptor antagonist NBQX was performed under stereotaxic guide cannula. The concentration of Glu and the expression of its receptors' subunits were detected respectively by high performance liquid chromatography (HPLC) and Western blot. The Hcy content and the levels of phosphorylation of NMDA receptor and AMPA receptor in hippocampus were separately determined by enzyme linked immunosorbent assay (ELISA). The results showed that CUMS significantly induced the depression-like behaviors in rats, and the content of Glu and Hcy, the expression of NMDA receptors' subunits NR1/NR2B and the level of phosphorylation of NMDA receptor (p-NMDAR) in hippocampus increased significantly, while the expression of AMPA receptors' subunits GluR2/3 and the level of phosphorylation of AMPA receptor (p-AMPAR) decreased significantly. Microinjection of Hcy into hippocampus resulted in similar animal depression-like behaviors and increased Glu content compared to the CON/SAL group, the expression of NR1/NR2B/GluR2/3 and the level of p-NMDAR increased significantly, but the level of p-AMPAR reduced observably. Intrahippocampal injections of MK-801 effectively improved the depression-like behaviors induced by CUMS and Hcy, and attenuated the elevation of Glu content induced by Hcy in hippocampus, whereas NBQX could not improve the depression-like behaviors, but also decreased the Glu content induced by Hcy remarkably. These results suggest that CUMS may contribute to the production and release of Hcy via hippocampal astrocytes. Through the increase of expression of NR1/NR2B/GluR2/3 and level of p-NMDAR, and the decrease of level of p-AMPAR, Hcy results in elevation of Glu level, which leads to depression-like behaviors in the end. In a word, the Hcy released by astrocytes plays an important role in stress-induced elevation of Glu content and variation of NMDA/AMPA receptors in hippocampus.

Multi-plane hyaluronic acid injection for rhinoplasty / 中华整形外科杂志

<p><b>OBJECTIVE</b>To investigate the effect of multi-plane Hyaluronic acid (HA) injection for rhinoplasty.</p><p><b>METHODS</b>The HA was injected below or above the periosteum at the nasal bone, above the perichondrium at the cartilage portion of nose, and between the great alar cartilage at the nasal tip. The HA volume was 1-1.5 ml, according to the nose form and aesthetic assessment. Over-injection was not permitted. Touch-up injection could be performed one week after the first injection if need.</p><p><b>RESULTS</b>From Jan. 2010 to Jan. 2012, 60 cases underwent rhinoplasty with HA injection. The patients were followed up for 10-13 months with satisfactory result. The effect lasted about 9 months with the longest period as 12 months and the shortest period as 6 months.</p><p><b>CONCLUSIONS</b>Good results can be achieved with multi-plane HA injection for rhinoplasty.</p>

The signification and method of HBeAg gray zone setting and its cut-off verification in chemiluminescent assay / 中华检验医学杂志

Objective To explore the signification and method of Cut-off verification and gray zone setting in chemiluminescent assay.Methods NCCLS EP-12 A2 document defines that C50 is the analyte concentration of cut off value for immunology qualitative test and C5-C95 interval is the range of analyte concentration that yields 5％ positive results to 95％ positive results for immunology qualitativc test.The C50 and C5-C95 interval of HBeAg in ARCHITECT i2000 were worked out according to the cut off value provided by HBeAg reagent calibrated in ARCHITECT i2000,which were verified to approve the character declaimed by manufactory or not.Gray zone was set and the procedure of cut off verification and gray zone set in chemiluminescent were built; A set of quality control was detected 20 times with two different lot HBeAg reagent kits,S/CO was caculated and compared with t test.Results C50 and C5-C95 interval of reagent (lot 06087L100,96378HN00) were 0.171 PEI U/ml,0.125 PEI U/ml; ＞0.154 PEI U/ml to 0.188 PEI U/ml,0.119 PEI U/ml to ＜0.150 PEI U/ml,respectively.S/CO of negative quality control and positive quality control were (0.550 ±0.038),(2.422 ±0.084) and(0.334 ±0.063),(3.587 ±0.321),respectively.They all approved the character (the sensitivity at cut off was less than 0.5 PEI U/ml)declaimed by manufactory,and the results of S/CO between two lot kits were obvious difference (t =9.944,15.499,P ＜0.01).Conclusion C50 and C5-95 interval can be used to verify cut off value and set gray zone in chemiluminescent assay;They may vary in different lot reagents and they must be verified to approve the character declaimed by manufactory.

The relationships among raphe magnus nucleus, locus coeruleus and dorsal motor nucleus of vagus in the descending regulation of gastric motility / 中国应用生理学杂志

<p><b>OBJECTIVE</b>To explore the interrelationship among dorsal motor nucleus of the vagus (DMV), locus coeruleus (LC) and raphe magnus nucleus (NRM) in the mechanism of the descending regulation on gastric motility, which may constitute a parasympathetic local circuit, work as a neural center of gastric modulation in brainstem.</p><p><b>METHODS</b>Using nucleus location, electric stimulation and lesion, together with microinjection, and recording the inter-gastric pressure.</p><p><b>RESULTS</b>(1) LC stimulation could inhibit the gastric motility significantly (P < 0.01), DMV lesion weaken this effect, while blocking the a receptor on DMV could reverse the effect. (2) NRM stimulation reduced the amplitude of gastric constriction (P < 0.01), DMV lesion could abolish the effect, but blocking the 5-HT2A receptor on DMV depressed the gastric motility heavily (P < 0.01) like NRM stimulation. While LC lesion could abolish the effect of NRM stimulation, and microinjection of ritanserin into LC could likewise abolish it.</p><p><b>CONCLUSION</b>(1) LC inhibit the gastric motility via a receptor in DMV, and meanwhile may excite it through 5-HT2A receptor in DMV, these two ways work together to keeping the gastric motility amplitude normally. (2) NRM inhibit the gastric motility via 5-HT2A receptor in LC.</p>

Activation of hippocampal D1 dopamine receptor inhibits glutamate-mediated depression induced by chronic unpredictable mild stress in rats / 生理学报

The present study was to investigate the role of dopamine D1 receptors and its relationship with glutamate, N-methyl-D-aspartic acid (NMDA) receptor and α-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA) receptor in depression induced by chronic unpredictable mild stress (CUMS). CUMS-induced depression model was established in Sprague-Dawley rats, and intrahippocampal microinjections of D1 dopamine receptor agonist SKF38393, non-competitive NMDA receptor antagonist MK-801 and AMPA receptor antagonist NBQX were respectively adopted by rat brain stereotaxic coordinates. The behavioral observations were conducted by measurement of weight changes, sucrose preference test, open-field test and tail suspension test. The concentration of glutamic acid and the expression of its receptors' subunits were detected by HPLC and Western blot, respectively. The results showed that, compared with control group, CUMS rats showed depression-like behavioral changes, higher concentration of glutamic acid, lower expressions of NMDA receptor (NR1) and AMPA receptor (GluR2/3) in hippocampus. Pretreatment with injection of SKF38393 could rescue such depression effect of CUMS, decrease the concentration of glutamic acid, and increase the expressions of NMDA receptor (NR1), AMPA receptor (GluR2/3) in hippocampus. Pretreatment with MK-801 could enhance the antidepressant effect of SKF38393, while NBQX weakened. These results suggest that agonists of D1 dopamine receptor could reduce the concentration of glutamic acid in hippocampus, and its antidepressant effect may be mediated by AMPA receptor partially.

Antidepressant effect of microinjection of neuropeptide Y into the hippocampus is mediated by decreased expression of nitric oxide synthase / 生理学报

Accumulating evidence indicates an important role of hippocampal dendrite atrophy in the development of depression, while neuropeptide Y (NPY) participates in hippocampal dendrite growth. The present study was aimed to investigate the relationship between NPY and nitric oxide synthase (NOS) in chronic unpredictable mild stress (CUMS)-induced depression. CUMS-induced depression model was established in Sprague-Dawley rats. Intrahippocampal microinjections of NPY, NPY-Y1 receptor antagonist GR231118 and non-specific NOS inhibitor N-nitro-L-arginine methyl ester (L-NAME) were respectively adopted by rat brain stereotaxic coordinates. The behavioral observations were conducted by sucrose consumption test, open field test and forced swimming test. The expressions of NPY, neuronal nitric oxide synthase (nNOS) and inducible nitric oxide synthase (iNOS) in hippocampus were detected by immunohistochemistry. The results showed that, compared with the control group, rats receiving CUMS for 21 d or intrahippocampal microinjection of GR231118 showed a significant reduction in body weight and depression-like behavior, which included reductions in sucrose preference, locomotor activity, rearing and grooming in open field test, and increased duration of immobility in forced swimming test. Moreover, the expression of NPY significantly decreased (P<0.01), while the expressions of nNOS and iNOS increased obviously in the hippocampal dentate gyrus (DG) and CA3 regions (P<0.01). Intrahippocampal microinjections of NPY prevented the depression-like behavioral changes induced by CUMS and decreased the expressions of nNOS and iNOS in the hippocampal DG and CA3 regions (P<0.01). Intrahippocampal microinjections of GR231118 reduced behavioral ability of the rats dramatically and significantly increased the expressions of hippocampal nNOS and iNOS (P<0.01). Intrahippocampal microinjections of L-NAME suppressed the depression-like behavioral changes induced by CUMS or intrahippocampal microinjection of GR231118. In conclusion, reduced expression of NPY and increased expression of NOS in hippocampus may make significant contributions to CUMS-induced depression. These results suggest that the antidepressant function of NPY associates with down-regulation of NOS expression in hippocampus, possibly mediated via NPY-Y1 receptor.

Involvement of hippocampal NMDA receptor and neuropeptide Y in depression induced by chronic unpredictable mild stress / 生理学报

The present study was aimed to investigate the role and relationship between N-methyl-D-aspartic acid (NMDA) receptor and neuropeptide Y (NPY) in depression induced by chronic unpredictable mild stress (CUMS). CUMS-induced depression model was established in Sprague-Dawley rats. Intrahippocampal injections of NMDA, non-competitive NMDA receptor antagonist MK-801 and NPY-Y1 receptor antagonist GR231118 were respectively adopted by rat brain stereotaxic coordinates. The behavioral observations were conducted by sucrose consumption test, open field test and forced swimming test. The expression of NPY in hippocampus was detected by immunohistochemistry. The results showed that compared with the control group, rats receiving CUMS for 21 days or intrahippocampal injection of GR231118 or NMDA showed depression-like behavioral changes, including a reduction in sucrose preference, body weight, locomotor activity, rearing and grooming in open field test, and increased duration of immobility in forced swimming test. Intrahippocampal injection of NMDA decreased the expression of NPY in hippocampal CA3 region and dentate gyrus (DG) region. Intrahippocampal injection of MK-801 improved the depression-like behavioral changes induced by CUMS, and increased the expression of NPY in hippocampal CA3 region and DG region. Co-injection of GR231118 and MK-801showed that GR231118 suppressed the antidepressant effect of MK-801. These data suggest that CUMS might induce depression through excessive release of glutamate (Glu), over-activation of NMDA receptors, and downregulation of NPY. Antidepressant effect of NPY was mainly mediated via NPY-Y1 receptor.

Association between the number of peripheral blood stem cells and cardiac function index in patients with ischemic heart failure / 中华心血管病杂志

<p><b>OBJECTIVE</b>To observe the association between the number of peripheral blood stem cells (PBSC) and cardiac function index (NYHA grade, left ventricular ejection fraction, LVEF, N-terminal-proB-type Natriuretic Peptide, NT-pro BNP) in patients with ischemic heart failure (IHF).</p><p><b>METHODS</b>A total of 199 patients hospitalized in our department between August 2007 and April 2008 due to IHF were included in this study. NYHA grade, LVEF (measured by echocardiography), plasma NT-proBNP and number of PBSC were analyzed.</p><p><b>RESULTS</b>PBSC number was significantly decreased in proportion with increasing NYHA grade and PBSC number was significantly lower in patients with NYHA IV than that with class II and III (all P<0.01). LVEF was positively correlated with PBSC number (r = 0.35, P = 0.001), NT-proBNP was negatively correlated with PBSC number (r = - 0.39, P = 0.009). Multiple regression analysis showed that LVEF and NT-proBNP were major determinants of PBSC (Beta = 0.14, - 0.25, 95% CI = -0.01 - 0.02, -0.18 - -0.04, P<0.05, P<0.01).</p><p><b>CONCLUSION</b>PBSC number was significantly correlated to cardiac function in IHF patients.</p>

The association of hippocampal glutamate with depression and the effects on gastric mobility / 中国应用生理学杂志

<p><b>AIM</b>To explore the relationship between the pathology of depression and glutamate (Glu) in hippocampus, and the effect on gastric mobility.</p><p><b>METHODS</b>Depression model was established by using the chronic unpredicted mild stress (CUMS). And stereotaxic and intra-hippocampal microinjection were also used in this experiment. Rat emotion and behaviors were observed by the change in body weight, sucrose preference-test, open field-test and forced swimming-test. Intragastric pressure and mobility were recorded with the instrument of Powerlab/8sp.</p><p><b>RESULTS</b>Compared with the control, 21-day CUMS significantly reduced the increase in body weight, rat sucrose preference, locomotor activity and rearing in open field test, while it significantly increased duration of immobility time in forced swimming test. Meanwhile, magnitudes of intragastric pressure and mobility were significantly declined after 21 days CUMS. Microinjection of Glu into hippocampus mimics the behaviors which were produced in CUMS. The down-rang of gastric mobility in the group of Glu injection was smaller than CUMS, but was much larger than the control. Intrahippocampal microinjection of MK-801 attenuated depression-like behaviors induced by stress, weakened stress-induced inhibition of intragastric pressure, and augmented the magnitudes of gastric contraction.</p><p><b>CONCLUSION</b>Glu and NMDA receptor in hippocampus are to do much with the etiology of stress- induced depression. They are not only concerned with behavioral changes induced by stress, but also with the variation of gastric activities, nevertheless, differences exist between the effects of behaviors and gastric activities.</p>