Objective:To investigate the preparation of sustained-release microspheres of brain-derived neurotrophic factor (BDNF) and its repairing effects on hypoxic-ischemic brain damage as well as the regulation of the tyrosine receptor kinase B (TrkB)/cAMP-response element binding protein (CREB) pathway in rats.Methods:BDNF sustained-release microspheres were prepared by emulsification-solvent evaporation method and polymer alloying method. The morphology of the microspheres was observed by a transmission electron microscope. The particle size and Zeta potential of the microspheres were measured by a Malvern ZS90 particle size analyzer, and the encapsulation rate and plasmid loading of the BDNF sustained-release microspheres were determined. The sustained release of the microspheres in vitro was also detected. A total of 45 SD rats were randomly divided into the sham-operation group, the model group, and the treatment group, with 15 rats in each group. Except for the sham-operation group, ischemic-hypoxic brain injury models were established in the other two groups by ligating the right common carotid artery and in a hypoxia environment. The rats in the treatment group were injected with 100 mg/kg of BNDF sustained-release microsphere solution via the tail vein once a day for 4 weeks, while the rats in the sham-operation group and the model group were injected with an equal amount of blank microsphere solution via the tail vein. At the end of the intervention, the neurological function scores, brain tissue water content, cerebral infarction area, malondialdehyde (MDA), and superoxide dismutase (SOD) levels were measured. The levels of tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) were detected by enzyme-linked immunosorbent assay (ELISA). The protein expressions of BDNF, TrkB, and phosphorylated CREB (p-CREB) were detected by Western Blot. Results:The appearance of BDNF sustained-release microspheres was round or oval, with a smooth surface and uniform size distribution. No interfused microspheres were observed. The size of microspheres was (221.49 ± 5.75) nm, the Zeta potential was (?27.03 ± 4.22) mV, and the encapsulation rate was (80 ± 2) %. The microspheres (1 mg) could carry (1.55 ± 0.04) μg of BDNF plasmid, and the sustained release of the drug stabilized at day 28. Compared with the model group, the neurological function score, brain tissue water content, cerebral infarction area, MDA, TNF-α, and IL-6 levels were decreased, and the SOD level and the protein expression of BDNF, TrkB, and p-CREB were increased in the treatment group (all P < 0.05). Conclusions:BDNF sustained-release microspheres can promote the repair of neurological damage caused by cerebral ischemia and hypoxia, reduce inflammation response and oxidative stress, and alleviate cerebral edema and cerebral infarction, which may play a role by activating the BDNF/TrkB/CREB pathway.

OBJECTIVE: To determine the role of Tripterygium wilfordii multiglycoside (TGW) in the treatment of psoriatic dermatitis from a cellular immunological perspective. METHODS: Mouse models of psoriatic dermatitis were established by imiquimod (IMQ). Twelve male BALB/c mice were assigned to IMQ or IMQ₊TGW groups according to a random number table. Histopathological changes in vivo were assessed by hematoxylin and eosin staining. Ratios of immune cells and cytokines in mice, as well as PAM212 cell proliferation in vitro were assessed by flow cytometry. Pro-inflammatory cytokine expression was determined using reverse transcription quantitative polymerase chain reaction. RESULTS: TGW significantly ameliorated the severity of IMQ-induced psoriasis-like mouse skin lesions and restrained the activation of CD45⁺ cells, neutrophils and T lymphocytes (all P<0.01). Moreover, TGW significantly attenuated keratinocytes (KCs) proliferation and downregulated the mRNA levels of inflammatory cytokines including interleukin (IL)-17A, IL-23, tumor necrosis factor α, and chemokine (C-X-C motif) ligand 1 (P<0.01 or P<0.05). Furthermore, it reduced the number of γ δ T17 cells in skin lesion of mice and draining lymph nodes (P<0.01). CONCLUSIONS TGW improved psoriasis-like inflammation by inhibiting KCs proliferation, as well as the associated immune cells and cytokine expression. It inhibited IL-17 secretion from γ δ T cells, which improved the immune-inflammatory microenvironment of psoriasis.
Male ; Animals ; Mice ; Tripterygium ; Psoriasis/drug therapy* ; Keratinocytes ; Skin Diseases/metabolism* ; Cytokines/metabolism* ; Imiquimod/metabolism* ; Dermatitis/pathology* ; Disease Models, Animal ; Mice, Inbred BALB C ; Skin/metabolism*

OBJECTIVE To explore the specific application and evaluation effect of objective structured clinical examination(OSCE)-guided scenario-based practical teaching mode in training clinical pharmacists. METHODS Fifty-six trainees who participated in the clinical pharmacist training program in the Second Xiangya Hospital of Central South University from October 2020 to September 2022 were selected as the research objects. OSCE-guided teaching was conducted, and the application effect of OSCE-guided teaching mode in clinical pharmacist training was explored and analyzed by using theoretical examination results and OSCE assessment results as evaluation indicators. RESULTS Through comparative analysis, it was found that the OSCE-guided teaching mode not only enabled students to better grasp the theoretical knowledge points required by the training outline, but also improved their clinical thinking ability, problem-solving ability, and communication and coordination skills to varying degrees. CONCLUSION For clinical pharmacist trainees, the OSCE teaching mode is conducive to the comprehensive improvement of clinical pharmacist skills and is suitable for cultivating clinical pharmacists who are capable of independently carrying out clinical pharmacy services in the new situation.

The usage of pesticides can enhance the production of crops,but their overuses may be hazardous to both people health and the environment.Thus,it is of great significance to develop effective methods to detect pesticides.Metal nanoclusters(MNCs)have become increasingly popular in analytical sensing areas because of their miniscule size,high stability,ease of manufacturing and good biocompatibility.They have exhibited great potential in the field of pesticides detection.In this paper,the detection methods of pesticides by using MNCs and their development in detection of organophosphorus pesticides,organic nitrogen pesticides,organochlorine pesticides and other types of pesticides were reviewed.Finally,the development prospects were discussed.

Accumulating evidence has confirmed the links between transfer RNA (tRNA) modifications and tumor progression. The present study is the first to explore the role of tRNA methyltransferase 5 (TRMT5), which catalyzes the m1G37 modification of mitochondrial tRNAs in hepatocellular carcinoma (HCC) progression. Here, based on bioinformatics and clinical analyses, we identified that TRMT5 expression was upregulated in HCC, which correlated with poor prognosis. Silencing TRMT5 attenuated HCC proliferation and metastasis both in vivo and in vitro, which may be partially explained by declined extracellular acidification rate (ECAR) and oxygen consumption rate (OCR). Mechanistically, we discovered that knockdown of TRMT5 inactivated the hypoxia-inducible factor-1 (HIF-1) signaling pathway by preventing HIF-1α stability through the enhancement of cellular oxygen content. Moreover, our data indicated that inhibition of TRMT5 sensitized HCC to doxorubicin by adjusting HIF-‍1α. In conclusion, our study revealed that targeting TRMT5 could inhibit HCC progression and increase the susceptibility of tumor cells to chemotherapy drugs. Thus, TRMT5 might be a carcinogenesis candidate gene that could serve as a potential target for HCC therapy.
Humans ; Carcinoma, Hepatocellular/pathology* ; Cell Hypoxia ; Cell Line, Tumor ; Gene Expression Regulation, Neoplastic ; Hypoxia-Inducible Factor 1, alpha Subunit/metabolism* ; Liver Neoplasms/pathology* ; Signal Transduction/genetics* ; tRNA Methyltransferases/metabolism*

Objective:To explore the construction and clinical practice of the training system for nurses in operating room subspecialty based on ORTCC model (including objectives, rules, training, assessment and culture), and to provide theoretical and practical guidance for the development of nursing subspecialty in operating room.Methods:This was a quasi-experimental study. The Union Hospital Affiliated to Tongji Medical College of Huazhong University of Science and Technology was convenient to select 23 operating room nurses who rotated in orthopedic surgery rooms from January 2019 to June 2020 as the control group, and the traditional training model for specialized nurses in operating rooms was adopted. From July 2020 to December 2021, the 24 operating room nurses rotating orthopedic surgery rooms were selected as the experimental group, and ORTCC teaching mode was adopted. The degree of mastery of theoretical knowledge, standardization of operation skills, correct rate of standard preventive implementation and satisfaction rate of doctors of operating room nurses under two different training methods were compared.Results:The theoretical score of operating room nurses increased from (84.71 ± 5.70) points in the control group to (92.68 ± 3.64) points in the experimental group, and the skill score increased from (90.17 ± 4.69) points in the control group to (95.43 ± 2.61) points in the experimental group, with statistical significance ( t = 13.76, 5.64, both P<0.01). The satisfaction rate of surgeons to nurses′ surgical cooperation ability communication, cooperation ability and emergency treatment ability increased from 82.61%(19/23), 73.91%(17/23) and 78.26%(18/23) in the control group to 100.00%(24/24), 95.83% (24/24) and 100.00% (24/24) in the experimental group, respectively, with statistically significant differences ( t = 4.56, 4.45, 5.84, all P<0.05). Conclusions:The training system of operating room subspecialty nurses based on ORTCC model is conducive to improving the theoretical knowledge mastery, standard operation skills and doctor satisfaction rate of operating room nurses to the specialty and subspecialty, providing training basis for the development of operating room subspecialty, and worthy of clinical promotion.

Objective:To compare the efficacy and safety of endoscopic cold snare polypectomy(CSP)and hot snare polypectomy(HSP)on 5 to 10 mm colonic polyps in children.Methods:One hundred and eighteen children, who underwent colonoscopy at Children′s Hospital Affiliated to Jiangnan University from June 2018 to June 2022 and found polyps with a diameter of 5-10 mm, were selected as the study subjects.They were divided into two groups by random number table method, with CSP(CSP group) and HSP(HSP group) for polypectomy respectively.The time required to remove a single polyp, intraoperative bleeding rate, postoperative bleeding rate, abdominal discomfort rate, hospitalization time, and hospitalization costs were compared between two groups.Results:Among 118 cases, there were 58 cases in CSP group, including 36 males and 22 females, with an average age of (6.17±3.34) years.There were 60 cases in HSP group, including 34 males and 26 females, with an average age of (5.68±3.18) years.There were no significant differences in sex and age between two groups( P>0.05). Compared with HSP group, the time required to remove a single polyp in CSP group was shorter[(6.68±0.34)min vs.(7.60±0.53)min], the rate of delayed postoperative bleeding was lower (0 vs.10.0%), the hospitalization time was shorter[(5.50±1.87) d vs.(6.38±1.38) d], and the hospitalization expenses were lower[(7 646.99±3 575.10)yuan vs.(10 006.47±3 657.42)yuan]. The differences were statistically significant (all P<0.05). Conclusion:The application of CSP to remove 5-10 mm colon polyps in children could shorten surgical treatment time and reduce the occurrence of complications.At the same time, it could reduce the hospitalization time and cost, and the overall effect is positive and safe, which is worthy of popularization and application by pediatricians in clinical practice.

Neuropathic pain(NP) has similar phenotypes but different sequential neuroinflammatory mechanisms in the pathological process. It is of great significance to inhibit the initiation of neuroinflammation, which has become a new direction of NP treatment and drug development in recent years. Mongolian drug Naru-3 is clinically effective in the treatment of trigeminal neuralgia, sciatica, and other NPs in a short time, but its pharmacodynamic characteristics and mechanism of analgesia are still unclear. In this study, a spinal nerve ligation(SNL) model simulating clinical peripheral nerve injury was established and the efficacy and mechanism of Naru-3 in the treatment of NPs was discussed by means of behavioral detection, side effect evaluation, network analysis, and experimental verification. Pharmacodynamic results showed that Naru-3 increased the basic pain sensitivity threshold(mechanical hyperalgesia and thermal radiation hyperalgesia) in the initiation of SNL in animals and relieved spontaneous pain, however, there was no significant effect on the basic pain sensitivity threshold and motor coordination function of normal animals under physiological and pathological conditions. Meanwhile, the results of primary screening of target tissues showed that Naru-3 inhibited the second phase of injury-induced nociceptive response of formalin test in mice and reduced the expression of inflammatory factors in the spinal cord. Network analysis discovered that Naru-3 had synergy in the treatment of NP, and its mechanism was associated with core targets such as matrix metalloproteinase-9(MMP9) and interleukin-1β(IL-1β). The experiment further took the dorsal root ganglion(DRG) and the stage of patho-logical spinal cord as the research objects, focusing on the core targets of inducing microglial neuroinflammation. By means of Western blot, immunofluorescence, agonists, antagonists, behavior, etc., the mechanism of Naru-3 in exerting NP analgesia may be related to the negative regulation of the MMP9/IL-1β signaling pathway-mediated microglia p38/IL-1β inflammatory loop in the activation phase. The relevant research enriches the biological connotation of Naru-3 in the treatment of NP and provides references for clinical rational drug use.
Rats ; Mice ; Animals ; Matrix Metalloproteinase 9/metabolism* ; Rats, Sprague-Dawley ; Neuroinflammatory Diseases ; Interleukin-1beta/metabolism* ; Spinal Cord/metabolism* ; Signal Transduction ; Hyperalgesia/metabolism* ; Neuralgia/metabolism*

The Baimai Ointment with the effect of relaxing sinew and activating collaterals demonstrates a definite effect on Baimai disease with pain, spasm, stiffness and other symptoms, while the pharmacodynamic characteristics and mechanism of this agent remain unclear. In this study, a rat model of chronic compression of L4 dorsal root ganglion(CCD) was established by lumbar disc herniation, and the efficacy and mechanism of Baimai Ointment in the treatment of CCD were preliminarily explored by behavioral tests, side effect evaluation, network analysis, antagonist and molecular biology verification. The pharmacodynamic experiment indicated that Baimai Ointment significantly improved the pain thresholds(mechanical pain, thermal pain, and cold pain) and gait behavior of CCD model rats without causing tolerance or obvious toxic and side effects. Baimai Ointment inhibited the second-phase nociceptive response of mice in the formalin test, increased the hot plate threshold of normal mice, and down-regulated the expression of inflammatory cytokines in the spinal cord. Network analysis showed that Baimai Ointment had synergistic effect in the treatment of CCD and was related to descending inhibition/facilitation system and neuroinflammation. Furthermore, behavioral tests, Western blot, and immunofluorescence assay revealed that the pain-relieving effect of Baimai Ointment on CCD may be related to the regulation of the interaction between neuroactive ligand and receptors(neuroligands) such as CHRNA7, ADRA2A, and ADRB2, and the down-regulation of the expression of NOS2/pERK/PI3K, the core regulatory element of HIF-1 signaling pathway in spinal microglia. The findings preliminarily reveal the mechanism of relaxing sinew and activating collaterals of Baimai Ointment in the treatment of Baimai disease, providing a reference for the rational drug use and further research of this agent.
Rats ; Mice ; Animals ; Chronic Pain/metabolism* ; Rats, Sprague-Dawley ; Ganglia, Spinal/metabolism* ; Ligands ; Signal Transduction ; Hyperalgesia/metabolism* ; Drugs, Chinese Herbal

Today, there is greater awareness on the association between oral diseases and respiration diseases after the outbreak of COVID-19. However, confusion regarding the oral health management and medical risk prevention for patients with chronic airway diseases has been remained among dental clinicians. Therefore, the dental experts of the Fifth General Dentistry Special Committee, Chinese Stomatological Association, combined with the experts of respiratory and critical care medicine, undertook the formation of consensus on the oral health management of patients with chronic airway diseases in order to help dental clinicians to evaluate medical risks and make better treatment decision in clinical practice. In the present consensus report, the relationship of oral diseases and chronic airway diseases, the oral health management and the treatment recommendations of patients with chronic airway diseases are provided.
COVID-19 ; Consensus ; Humans ; Oral Health ; Oral Medicine