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1.
Article in Chinese | WPRIM | ID: wpr-798914

ABSTRACT

Pancreatic cancer is an aggressive malignant tumor with poor prognosis. On the one hand, it has a narrow therapeutic window due to the lack of specific markers and obvious clinical symptoms. Once diagnosed, it has often developed to an advanced stage. On the other hand, located in a vital region of the body, pancreatic operation is difficult and the postoperative recurrence rate is high. Therefore, surgical treatment is only sui-table for a small number of early patients. Pancreatic cancer has a tumor microenvironment with the characteristic of dense stroma, hypoxia, paucity of blood vessels and highly immunosuppression. It is often insensitive to traditional radiation and chemotherapy. Therefore, strategies targeting on tumor microenvironment have a potential prospect. This article reviews the research progress in tumor microenvironment of pancreatic cancer, in order to provide the references in the further research and treatment of pancreatic cancer.

2.
Article in Chinese | WPRIM | ID: wpr-865022

ABSTRACT

Pancreatic cancer is an aggressive malignant tumor with poor prognosis.On the one hand,it has a narrow therapeutic window due to the lack of specific markers and obvious clinical symptoms.Once diagnosed,it has often developed to an advanced stage.On the other hand,located in a vital region of the body,pancreatic operation is difficult and the postoperative recurrence rate is high.Therefore,surgical treatment is only suitable for a small number of early patients.Pancreatic cancer has a tumor microenvironment with the characteristic of dense stroma,hypoxia,paucity of blood vessels and highly immunosuppression.It is often insensitive to traditional radiation and chemotherapy.Therefore,strategies targeting on tumor microenvironment have a potential prospect.This article reviews the research progress in tumor microenvironment of pancreatic cancer,in order to provide the references in the further research and treatment of oancreatic cancer.

3.
Article in English | WPRIM | ID: wpr-846942

ABSTRACT

This study aimed to establish an animal model of decompression-induced lung injury (DILI) secondary to repetitive diving in mice and explore the role of macrophages in DILI and the protective effects of high-concentration hydrogen (HCH) on DILI. Mice were divided into three groups: control group, DILI group, and HCH group. Mice were exposed to hyperbaric air at 600 kPa for 60 min once daily for consecutive 3 d and then experienced decompression. In HCH group, mice were administered with HCH (66.7% hydrogen and 33.3% oxygen) for 60 min after each hyperbaric exposure. Pulmonary function tests were done 6 h after decompression; the blood was harvested for cell counting; the lung tissues were harvested for the detection of inflammatory cytokines, hematoxylin and eosin (HE) staining, and immunohistochemistry; western blotting and polymerase chain reaction (PCR) were done for the detection of markers for M1 and M2 macrophages. Our results showed that bubbles formed after decompression and repeated hyperbaric exposures significantly reduced the total lung volume and functional residual volume. Moreover, repetitive diving dramatically increased proinflammatory factors and increased the markers of both M1 and M2 macrophages. HCH inhalation improved lung function to a certain extent, and significantly reduced the pro-inflammatory factors. These effects were related to the reduction of M1 macrophages as well as the increase in M2 macrophages. This study indicates that repetitive diving damages lung function and activates lung macrophages, resulting in lung inflammation. HCH inhalation after each diving may be a promising strategy for the prevention of DILI.

4.
Article in Chinese | WPRIM | ID: wpr-872800

ABSTRACT

Objective::To establish a rapid evaluation method for Cinnamomi Cortex decoction pieces by near infrared spectroscopy. Method::The contents of coumarin, cinnamalol, cinnamic acid and cinnamaldehyde in 86 batches of Cinnamomi Cortex of different origins were determined by HPLC. And the NIR spectra of different batches of Cinnamomi Cortex were also collected. With NIR spectrum as independent variable and coumarin, cinnamalol, cinnamic acid and cinnamaldehyde as dependent variables, a quantitative analysis model of four components in cinnamon was established by partial least squares method. Result::The correlation coefficients (r) of coumarin, cinnamic alcohol, cinnamic acid and cinnamaldehyde near infrared quantitative analysis models were 0.952 8, 0.977 7, 0.961 9, 0.992 2, root mean square error of cross(RMSEC) were 0.012 2, 0.006 1, 0.004 3, 0.82 g·g-1, root mean square errorof cross-validation(RMSECV) were 0.015 8, 0.011 2, 0.002 0, 1.481 1 g·g-1, and root mean square error of prediction(RMSEP) were 0.017 8, 0.010 3, 0.010 3, 0.005 5, 1.63 g·g-1. Conclusion::The established NIR quantitative analysis model of four active ingredients in Cinnamomi Cortex slices has a good accuracy, and provides a basis for rapid evaluation of the quality of Cinnamomi Cortex slices.

5.
Article in Chinese | WPRIM | ID: wpr-687353

ABSTRACT

Pancreas metabonomic profiles of the type 2 diabetic rats' induced by streptozotocin(STZ) and high-sugar, high fat diet on the treatment of Renshenjian decoction(RSJD) after 8 weeks were investigated.In this study, 48 Rats were randomly divided into four groups: normal control (NC), Pathological model (PM), Renshenjian decoction(RSJD 3.76 g·kg⁻¹) and glimepiride control (GC 0.04 mg·kg⁻¹). They are induced insulin resistance model of type 2 diabetes mellitus by streptozotocin(STZ) after 4 weeks' high-sugar, high fat diet except for NC. After sucessful modeling, they are given intragastric administration respectively with same amount of saline, RSJD and glimepiride in 4 weeks. At the end of the 8th week, the pancreatic tissue of rats in each group was collected, and the ¹H-NMR spectrum was collected after being treated by certain method, and analyzed by principal component analysis (PCA). Compared with NC's rats, we found PM's a significant elevation in the level of leucine/isoleucine, valine, lactic acid, creatine but reduction in the level of inose and less obvious changes in the level of creatine, cholic acid, taurine in pancreatic extract. After having been recieved RSJD, reduction level in leucine/isoleucine, valine, alanine, creatine, choline, taurine are also found in pancreatic extract of RSJD's rats, together with the increase of creatinine and tryptophan levels. The results showed that RSJD could regulate the level of amino acids in pancreas of IR rats, promoting a recovery in the process of metabolism. It's helpful to simulate the metabolic changes of IR rats via ¹H-NMR for a further understanding to study the mechanism how RSJD treat IR rats.

6.
Article in English | WPRIM | ID: wpr-914305

ABSTRACT

Sleep deficiency is a common public health problem associated with many diseases, such as obesity and cardiovascular disease. In this study, we established a sleep deprivation (SD) mouse model using a ‘stick over water’ method and observed the effect of sleep deficiency on ocular surface health. We found that SD decreased aqueous tear secretion; increased corneal epithelial cell defects, corneal sensitivity, and apoptosis; and induced squamous metaplasia of the corneal epithelium. These pathological changes mimic the typical features of dry eye. However, there was no obvious corneal inflammation and conjunctival goblet cell change after SD for 10 days. Meanwhile, lacrimal gland hypertrophy along with abnormal lipid metabolites, secretory proteins and free amino-acid profiles became apparent as the SD duration increased. Furthermore, the ocular surface changes induced by SD for 10 days were largely reversed after 14 days of rest. We conclude that SD compromises lacrimal system function and induces dry eye. These findings will benefit the clinical diagnosis and treatment of sleep-disorder-related ocular surface diseases.

7.
Article in English | WPRIM | ID: wpr-331141

ABSTRACT

Stellate ganglion blockade (SGB) protects patients from focal cerebral ischemic injury, and transection of the cervical sympathetic trunk (TCST) in a rat model can mimic SGB in humans. The purpose of this study was to investigate the mechanisms underlying the neuroprotective effects of TCST on neuronal damage in the hippocampus in a rat model of middle cerebral artery occlusion (MCAO) in an attempt to elucidate the neuroprotective effects of SGB. The modified method of Zea Longa was used to establish the permanent MCAO model. Male Wistar rats were randomly divided into three groups: sham-operated group, MCAO group, and TCST group. The animals in TCST group were sacrificed 48 h after TCST which was performed after the establishment of the MCAO model. Proteins were extracted from the ipsilateral hippocampus and analyzed by two-dimensional difference gel electrophoresis (2D-DIGE) and peptide mass fingerprinting (PMF). The levels of N-ethylmaleimide-sensitive factor (NSF) were measured as well. The results showed that 11 types of proteins were identified by 2D-DIGE. The expressions of eight proteins were changed both in the sham-operated and TCST groups, and the expressions of the other three proteins were changed in all three groups. Moreover, the expression of NSF was higher in the TCST group than in the MCAO group but lower in the MCAO group than in sham-operated group. The ratio of NSF expression between the MCAO group and shamoperated group was -1.37 (P<0.05), whereas that between the TCST group and MCAO group was 1.35 (P<0.05). Our results imply that TCST increases the expression of NSF in the hippocampus of adult rats with focal cerebral ischemia, which may contribute to the protection of the injured brain. Our study provides a theoretical basis for the therapeutic application of SGB to patients with permanent cerebral ischemia.


Subject(s)
Animals , Brain Injuries , Genetics , Metabolism , Pathology , Brain Ischemia , Genetics , Metabolism , Pathology , Gene Expression Regulation , Hippocampus , Metabolism , Pathology , Male , N-Ethylmaleimide-Sensitive Proteins , Genetics , Rats , Rats, Wistar , Stellate Ganglion , Metabolism , Pathology , Transfection
8.
Article in English | WPRIM | ID: wpr-636877

ABSTRACT

Stellate ganglion blockade (SGB) protects patients from focal cerebral ischemic injury, and transection of the cervical sympathetic trunk (TCST) in a rat model can mimic SGB in humans. The purpose of this study was to investigate the mechanisms underlying the neuroprotective effects of TCST on neuronal damage in the hippocampus in a rat model of middle cerebral artery occlusion (MCAO) in an attempt to elucidate the neuroprotective effects of SGB. The modified method of Zea Longa was used to establish the permanent MCAO model. Male Wistar rats were randomly divided into three groups: sham-operated group, MCAO group, and TCST group. The animals in TCST group were sacrificed 48 h after TCST which was performed after the establishment of the MCAO model. Proteins were extracted from the ipsilateral hippocampus and analyzed by two-dimensional difference gel electrophoresis (2D-DIGE) and peptide mass fingerprinting (PMF). The levels of N-ethylmaleimide-sensitive factor (NSF) were measured as well. The results showed that 11 types of proteins were identified by 2D-DIGE. The expressions of eight proteins were changed both in the sham-operated and TCST groups, and the expressions of the other three proteins were changed in all three groups. Moreover, the expression of NSF was higher in the TCST group than in the MCAO group but lower in the MCAO group than in sham-operated group. The ratio of NSF expression between the MCAO group and shamoperated group was -1.37 (P<0.05), whereas that between the TCST group and MCAO group was 1.35 (P<0.05). Our results imply that TCST increases the expression of NSF in the hippocampus of adult rats with focal cerebral ischemia, which may contribute to the protection of the injured brain. Our study provides a theoretical basis for the therapeutic application of SGB to patients with permanent cerebral ischemia.

9.
Article in Chinese | WPRIM | ID: wpr-286005

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the value of susceptibility weighted imaging(SWI)in the diagnosis of hemorrhagic foci early after blast injury and its role in the outcome prediction.</p><p><b>METHODS</b>Totally 30 rabbits with blast-induced cerebral blast injury were used in this study. After routine CT/MRI and SWI scanning,quantified analysis was performed in regions of interest using post-processing technology. After dissecting the brains of the experimental rabbits,the cerebral histopathological changes were observed,and the results were compared with SWI findings.</p><p><b>RESULTS</b>In these 30 rabbits,22,102,221,and 738 hemorrhagic foci were detected by CT,T1WI,T2WI,and SWI,respectively. The number of cerebral microbleeds detected by SWI was significantly larger than those revealed by conventional T1WI and T2WI(Χ(2)=10.00,P<0.01). Furthermore,the SWI imaging displayed the punctiform(n=315,42.7%),lamellar(n=218,29.5%),slinar(n=205,27.8%)hypointense foci,with clear margin. The number of hemorrhagic foci detected by SWI was positively correlated with survival(r=-0.667,P<0.05).</p><p><b>CONCLUSIONS</b>SWI remarkably increases the detection rate of hemorrhagic foci(particularly microbleeds)in rabbits with cerebral blast injury. The number of cerebral microbleeds and location of foci are closely related with the outcomes and therefore may facilitate clinical managment.</p>


Subject(s)
Animals , Blast Injuries , Diagnosis , Brain , Pathology , Brain Injuries , Diagnosis , Cerebral Hemorrhage , Diagnosis , Female , Image Enhancement , Magnetic Resonance Imaging , Methods , Male , Prognosis , Rabbits
10.
Article in Chinese | WPRIM | ID: wpr-552161

ABSTRACT

Objective To analyze the X ray findings of enema unreduced (including 4 perforations ) intussusception so as to improve the knowledge about the difficulty of reduction by air enema or the risk of perforation. Methods Of the 552 cases, 506 cases were successfully reduced by air enema. The range of air pressure was 6.67 to 14.67 kPa(60~110 mm Hg). Forty six unreduced cases were cured by operation. The films were taken before and during the reduction period. X ray findings were analyzed compared with that of the operative pathology. Results (1)Abdominal plain films showed total obstruction in 26 cases and asctis in 4 cases; (2) Air enema showed big and lobular masses in 36 cases and the location of masses in distal part of colon in 22 cases; (3)Operation pathology: ileoilecolic intussusception in 35 cases, 15 cases with intestinal necrosis (including 4 perforation cases). In 3 cases, perforations were in the intussusceptum,the other in the intussuscipiens. Conclusion 92% of intussusceptions can be reducted by pressure of air enema. Complex intussusception, with intestinal necrosis and primary intussusceptum, are difficult to reduce, and these patients ought to be operated on time.

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