Meta-analysis of the role of fibular fixation in tibiofibular fractures / 中国骨伤

OBJECTIVE@#To compare the role and importance of fibular fixation in tibiofibular fractures by Meta-analysis.@*METHODS@#The literature related to the comparison of the efficacy of fixation of the fibula with or without fixation on the treatment of tibiofibular fractures was searched through the databases of China Knowledge Network, Wipu, Wanfang, The Cochrane Library, Web of science and Pubmed, and statistical analysis was performed using RevMan 5.3 software. The rates of malrotation, rotational deformity, internal/external deformity, anterior/posterior deformity, non-union, infection, secondary surgery and operative time were compared between the fibula fixation and non-fixation groups.@*RESULTS@#A total of 11 publications were included, six randomised controlled trials and five case-control trials, eight of which were of high quality. A total of 813 cases were included, of which 383 were treated with fibula fixation and 430 with unfixed fibulae.Meta-analysis results showed that fixation of the fibulae in the treatment of tibiofibular fractures reduced the rates of postoperative rotational deformity[RR=0.22, 95%CI(0.10, 0.45), P<0.000 1] and internal/external deformity[RR=0.34, 95%CI(0.14, 0.84), P=0.02] and promoted fracture healing [RR=0.76, 95%CI(0.58, 0.99), P=0.04]. In contrast, the rates of poor reduction [RR=0.48, 95% CI(0.10, 2.33), P=0.36], anterior/posterior deformity[RR=1.50, 95%CI(0.76, 2.96), P=0.24], infection[RR=1.43, 95%CI(0.76, 2.72), P=0.27], secondary surgery[RR=1.32, 95%CI(0.82, 2.11), P=0.25], and operative time[MD=10.21, 95%CI(-17.79, 38.21), P=0.47] were not statistically significant (P>0.05) for comparison.@*CONCLUSION@#Simultaneous fixation of the tibia and fibula is clinically more effective in the treatment of tibiofibular fractures.

Inflammatory and Immunomodulatory Effects of Tripterygium wilfordii Multiglycoside in Mouse Models of Psoriasis Keratinocytes / 中国结合医学杂志

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.

Effect of botulinum toxin type A on children with odorihidrosis / 中华医学美学美容杂志

Objective:To investigate the effect of botulinum toxin type A on children with odorihidrosis.Methods:From March 2017 to February 2021, 121 children with odorihidrosis, including 48 males and 73 females, aged 13 to 17 (15.9±1.2) years, were admitted to the Burn and Plastic Surgery Department of the 980 Hospital of PLA. There were 24 cases in mild group, 50 cases in moderate group and 47 cases in severe group. Botulinum toxin A was injected into 20-50 points on each side, and 1 U was injected into each point. The total amount of botulinum toxin A was 50-100 U on both sides.Results:Three groups of children were evaluated for efficacy, 24 cases of mild group was significantly effective in 23 cases, accounting for 95.8%. In the moderate group, 46 (92.0%) of 50 cases showed obvious effect. 49 cases (98.0%) were effective; In the severe group, 40 cases (85.1%) showed obvious effect and 45 cases (95.7%) were effective. Three groups of children with different efficacy had no statistical significance ( P>0.05). The significant efficiency in mild and moderate groups was higher than that in severe group, and the difference was statistically significant ( P<0.05). Conclusions:Botulinum toxin type A is effective in the treatment of children with mild and moderate bromhidrosis, and is worthy of clinical application.

Fascia lata autograft bridging repair reinforced with artificial ligament as an internal brace for arthroscopic management of irreparable massive rotator cuff tears / 中华骨科杂志

Objective:To compare the clinical and imaging outcomes of fascia lata autograft bridging repair reinforecd with an artificial ligament as the internal brace with the autograft bridging repair for the treatment of irreparable massive rotator cuff tears (IMRCTs).Methods:The data of 26 patients with IMRCT who underwent fascia lata autograft bridging repair augmented with artificial ligament as the internal brace (internal brace group) and of 24 patients with IMRCT who underwent bridging autograft repair alone (control group) were retrospectively evaluated preoperatively and at 2-year follow-up. Clinical outcomes were assessed using shoulder activity, the American Shoulder and Elbow Surgeons (ASES) Score, University of California Los Angeles (UCLA) Score, and visual analogue scale (VAS) for pain. Imaging outcomes were evaluated using acromiohumeral distance (AHD), Goutallier grade, and status of fascia lata grafts according to radiographs or magnetic resonance imaging results.Results:All 50 cases were followed up for 34.2±7.2 months (range 24-45 months). Compared to the control group, the internal brace group showed better ASES score (93.5±5.3 vs. 89.5±5.7, P<0.05), UCLA score (31.7±3.8 vs. 28.5±5.6, P<0.05), improvement in UCLA score (19.6±4.2 vs. 15.9±5.7, P<0.05), active elevation (167.3°±8.4° vs. 159.4°±13.6°, P<0.05), abduction strength (8.9±1.2 vs. 8.2±1.2, P<0.05), improvement in abduction strength (4.1±1.2 vs. 3.3± 1.0, P<0.05), AHD (7.0±1.4 mm vs. 5.9±1.0 mm, P<0.05), improvement in AHD (3.3±1.5 mm vs. 2.0±0.6 mm, P<0.05), and healing rate of fascia lata autografts (92% vs. 54%, P<0.05) at 2-year follow-up. Conclusion:Fascia lata autograft bridging repair reinforced with an artificial ligament as the internal brace improves healing rate of bridging graft and postoperatively short-term clinical outcomes of patients with IMRCT.

The efficacy analysis of moderately hypofractionated IMRT combined with androgen deprivation therapy for locally advanced prostate cancer / 中华放射医学与防护杂志

Objective:To investigate the efficacy and adverse reactions of moderately hypofractionated intensity modulated radiation therapy (IMRT) combined with androgen deprivation therapy (ADT) for locally advanced prostate cancer (LAPC).Methods:This study retrospectively analyzed the medical records of 40 LAPC patients who were admitted in The Second Hospital of Dalian Medical University during 2014-2020. The planning gross target volume (PGTV) dose for prostate gland and seminal vesicle gland was 64.8-70.0 Gy/25-28 f, 2.4-2.8 Gy/f and the dose of PGTVnd in 20 cases with positive pelvic lymph nodes was 60.0-64.4 Gy/25-28 f, 2.3-2.4 Gy/f. The dose of planning target volume (PTV) for the drainage area of pelvic lymph nodes was 45.0-50.4 Gy/25-28 f. The enrolled patients were treated with long-term ADT, including neoadjuvant, simultaneous, and adjuvant therapies. The efficacy and adverse reactions were evaluated. The prognostic factors affecting the biochemical failure-free survival (BFFS) were analyzed.Results:The median follow-up time was 31 months. The 2- and 3-year overall survival (OS) rates were 100% and 96.9%, respectively. The 1-, 2-, and 3-year BFFS rates were 90%, 76.8% and 72%, respectively. The 1-, 2-, and 3-year distant metastasis-free survival (DMFS) rates were 92.2%, 82.8% and 75.1%, respectively. Gleason (GS) score ( χ2=10.00, P < 0.05) and adjacent tissue invasion ( χ2=8.85, P<0.05) were prognostic factors related to BFFS for LAPC. Adjacent tissue invasion and GS 9-10 were independent poor prognostic factors. The incidence of acute urinary adverse reaction and rectal injury (grade≥2) was 7.5% and 20%, respectively. The incidence of late urinary adverse reaction and rectal injury (grade≥2) was 12.5% and 17.5%, respectively. Adverse reactions at grade 3-4 did not occur. Conclusions:The moderately hypofractionated IMRT combined with ADT is feasible for LAPC treatment, achieving satisfactory survival effects. 70 Gy/25-28 f, 2.5-2.8 Gy/f is a safe and effective moderate hypofraction scheme. Adjacent tissue invasion and GS score are prognostic factors related to BFFS for LAPC.

Exposure to specific far-infrared ray based on gra-phene film promotes exercise capacity and glucose metabolism via AMPK / 中国药理学与毒理学杂志

OBJECTIVE AMPK activator,act as exer-cise mimetics,effective in preventing or ameliorating met-abolic diseases,including obesity and diabetes.Systemic activating of AMPK represents an important therapeutic strategy to treat metabolic diseases.However,whether far-infrared(FIR)hyperthermia therapy could be used as exercise mimetic to realize wide-ranging metabolic regu-lation,and its underling mechanisms remain unclear.METHODS The mice were subjected to hyperthermia in the FIR chamber(30±1)℃for 14 d.Exercise endurance was determined using a treadmill.Blood flow were mea-sured by the laser speckle contrast imaging.Combina-tion of microbiomic and metabolomic analysis,diversity of microbiota and metabolic profiling in muscle were detected.The microbiota disorder model via treatment with different cocktails of antibiotics(ABX).RESULTS The material characterization shows that the graphene synthesized by chemical vapour deposition(CVD)is dif-ferent from carbon fi ber,with single-layer structure and high electrothermal transform efficiency.The emission spectra generated by graphene-FIR device would maxi-mize matching those adsorbed by tissues(≈8.0 μm).Gra-phene-FIR improves core and epidermal temperature,and increases blood flow in femoral muscle and abdo-men.The diversity of gut microbiota was increased by graphene-FIR exposure.Graphene-FIR reduced the bac-teroidetes/firmicutes(B/F)ratio and increased the abun-dance of short-chain fatty acids(SCFA)-producing bac-teria,including Allobaculum,Blautia and Anaerostipes.Additionally,graphene-FIR stimulated the expression of SCFAs-sensing receptor(GPR 43),p-AMPK Thr172 and GLUT4,and increased the AMP/ATP ratio,thus enhanc-ing muscle glucose uptake.Metabolomic analyses revealed the significant changes in 25 metabolites,with twenty increased(eg.creatinine and phosphate)and five decreased(eg.lactic acid),and the marked impact of five metabolic pathways,including galactose metabo-lism,glycolysis,gluconeogenesis,fatty acid biosynthesis,butanoate metabolism,pyruvate metabolism.Further-more,a microbiota disorder model also demonstrates that the graphene-FIR effectively restore the exercise endurance with enhanced p-AMPK and GLUT4.CON-CLUSION Our results provide convincing evidence that graphene-based FIR therapy promoted exercise capacity and glucose metabolism via AMPK in gut-muscle axis.These novel insights into graphene-FIR therapy suggest a potential as an exercise mimetic for the treatment of metabolic disease in clinical.

Cannabinoid CB1 receptors are expressed in a sub-set of dopamine neurons and underlie cannabinoid modulation of DA release and DA-related behavior in mice / 中国药理学与毒理学杂志

OBJECTIVE Cannabinoids modulate do-pamine(DA)transmission and DA-related behavior,which has been thought to be mediated initially by acti-vation of cannabinoid CB1 receptors(CB1Rs)on GABA neurons.However,the cellular and receptor mechanisms underlying cannabinoids' psychoactive effects are not fully understood.The present study is to explore the pos-sible expression character of CB1Rs and elucidated the underlying mechanism of them.METHODS We took advantage of RNAscope in situ hybridization(ISH)assays and triple-staining assays to detect the CB1R-expressing neurons.We established an optical intracranial self-stimulation(OICSS)behavioral model by using opto-genetics to study dopaminergic reinforcement function.Natural and synthetic cannabinoids were used to study the function of CB1Rs.Conditional genetic depletion of CB1Rs and behavioral assay were performed to study the modulatory role of CB1Rs in DA-related behaviors.RESULTS We found that CB1Rs are also expressed in a subset of DA neurons and functionally underlie cannabi-noid action in male and female mice.ISH assays demon-strated CB1 mRNA in tyrosine hydroxylase(TH)-posi-tive DA neurons in the ventral tegmental area(VTA)and glutamate decarboxylase 1(GAD1)-positive GABA neu-rons.The CB1R expressing DA neurons were located mainly in the middle portion of the VTA with the number of CB1-TH colocalization progressively decreasing from the medial to the lateral VTA.Triple-staining assays indi-cated CB1R mRNA colocalization with both TH and vesicular glutamate transporter 2(VgluT2,a glutamate neuronal marker)in the medial VTA close to the midline of the brain.Optogenetic activation of this population of DA neurons was rewarding as assessed by OICSS.D9-tetrahydrocannabinol(D9-THC)or ACEA(a selective CB1R agonist)dose-dependently inhibited optical intra-cranial self-stimulation in DAT-Cre control mice,but not in conditional knockout mice with the CB1R gene absent in DA neurons.In addition,deletion of CB1Rs from DA neurons attenuated D9-THC-induced reduction in DA release in the NAc,locomotion,and anxiety.CONCLU-SION Our results indicated that CB1Rs are expressed in a subset of DA neurons that corelease DA and gluta-mate,and functionally underlie cannabinoid modulation of DA release and DA-related behavior.

Application of uterine artery blood flow ultrasonic parameters in prognosis evaluation of threatened abortion during early pregnancy / 中国基层医药

Objective:To explore the application value of uterine artery blood flow ultrasound parameters in evaluating the prognosis of threatened abortion during early pregnancy.Methods:In this non-randomized controlled prospective clinical study, 108 women with threatened abortion during early pregnancy (6-12 weeks of pregnancy) who received treatment in the Health Community Group of Yuhuan Second People's Hospital from July 2021 to December 2022 were included in the observation group. An additional 108 healthy women who were at the early stage of pregnancy were selected for the control group. Color Doppler ultrasound was performed in both groups to measure the ultrasonic parameters of uterine artery blood flow (peak systolic/end diastolic flow velocity, resistance index, pulsatility index) and compare their differences. The pregnant women in the observation group were followed up until 28 weeks of gestation, and their prognosis was analyzed. The pregnant women who had successfully insured their babies were included in the good prognosis group, and the pregnant women who had aborted their babies were included in the poor prognosis group. The ultrasonic parameters of uterine artery blood flow in the two groups were compared. Logistic regression analysis was used to analyze the correlation between ultrasound parameters of uterine artery blood flow and poor prognosis.Results:In the observation group, the systolic peak/end diastolic flow velocity, resistance index, and pulsatility index on the left side were (6.46 ± 1.71), (0.97 ± 0.30), (2.72 ± 0.89), respectively, and they were (6.49 ± 1.70), (0.96 ± 0.32), (2.70 ± 0.91) respectively on the right side, which were significantly greater than (3.90 ± 1.02), (0.64 ± 0.17), (1.36 ± 0.54), (3.91 ± 1.04), (0.62 ± 0.18), (1.35 ± 0.52) in the control group ( t = 13.36, 9.95, 13.58, 13.45, 9.62, 13.39, all P < 0.001). Twenty-eight-week follow-up results showed that 72 women (66.67%) in the observation group had successfully insured their babies and 36 women (33.33%) had aborted their babies. In the good prognosis group, the systolic peak/end diastolic flow velocity, resistance index, and pulsatile index were (7.95 ± 1.89), (1.22 ± 0.36), (3.06 ± 0.95) on the left side, and they were (7.45 ± 1.94), (1.24 ± 0.37), and (3.03 ± 0.96) on the right side, which were significantly greater than (4.72 ± 1.27), (0.77 ± 0.24), (1.74 ± 0.69), (4.74 ± 1.32), (0.75 ± 0.25), (1.77 ± 0.70) in the poor prognosis group ( t = 10.53, 7.73, 8.23, 8.55, 8.14, 7.76, all P < 0.001). Logistic regression analysis showed that peak systolic/end diastolic flow velocity and resistance index were risk factors for poor prognosis of threatened abortion during early pregnancy, while the pulsatility index had no significant correlation with poor prognosis of threatened abortion during early pregnancy. Conclusion:Uterine artery blood flow ultrasound parameters have a certain predictive value for the prognosis evaluation of threatened abortion during early pregnancy, which can provide an important reference for clinical fetal protection treatment and benefit the prognosis of pregnant women.

Observation on the efficacy of moderate and high myopia patients with vault greater than 1 000 μm after implantation of phakic posterior chamber implantable contact lens / 国际眼科杂志(Guoji Yanke Zazhi)

AIM: To observe the efficacy of moderate and high myopia patients with vault greater than 1 000μm after implantation of phakic posterior chamber implantable contact lens(ICL).METHODS: A total of 42 patients(73 eyes)who received ICL implantation in the hospital and had postoperative vault greater than 1 000 μm between January 2014 and January 2017 were selected and retrospectively studied. Changes in visual acuity, intraocular pressure, corneal endothelial cell density, anterior chamber-related parameters(chamber angle, central anterior chamber depth, anterior chamber volume)and vault were compared among patients before surgery, at 1, 3, 6mo and 1a after surgery and at the last follow-up.RESULTS: The uncorrected visual acuity(UCVA)at 1, 3, 6mo and 1a after surgery and at the last follow-up was better than that before surgery(all P&#x0026;#x003C;0.05), and the chamber angle, central anterior chamber depth and anterior chamber volume were smaller or lower than those before surgery(all P&#x0026;#x003C;0.05), but there were no statistical differences in UCVA, chamber angle, central anterior chamber depth and anterior chamber volume at each time point after surgery(all P&#x0026;#x003E;0.05). The intraocular pressure at 1mo after surgery was lower than that before surgery(P&#x0026;#x003C;0.05), but the intraocular pressure at 3, 6mo and 1a after surgery and at the last follow-up was not statistically different from that before surgery(all P&#x0026;#x003E;0.05). There was no statistical significance in the corneal endothelial cell density at 1, 3, 6mo and 1a after surgery and at the last follow-up compared with that before surgery(all P&#x0026;#x003E;0.05). The vault at 1, 3, 6mo and 1a after surgery and at the last follow-up showed a decreasing trend, and the difference was statistically significant at each time point after surgery(all P&#x0026;#x003C;0.05).CONCLUSION: The short-term and long-term efficacy are better in moderate and high myopia patients with vault greater than 1 000 μm after ICL implantation, and there are no significant effects on the intraocular pressure and corneal endothelial cell. The postoperative anterior chamber structure is relatively stable and the vault tends to decrease over time. In most cases, close observation is sufficient and intraocular lens replacement is generally not required.

RHD Gene Analysis of A Blood Donor with Del Phenotype / 中国实验血液学杂志

OBJECTIVE@#To analyze the RHD genotype of a blood donor with Del phenotype in Yunnan.@*METHODS@#Rh serological phenotype was identified. RHD gene was detected by PCR-SSP typing, and its 10 exons were sequenced. Exon 9 was amplified for sequencing and analysis. RHD zygosity was detected.@*RESULTS@#The Rh phenotype of this specimen was CcDelee. Genomic DNA exhibited a 1 003 bp deletion spanning from intron 8, across exon 9 into intron 9. The deletion breakpoints occurred between two 7-bp short tandem repeat sequences. There was no variation in the sequences of the remaining exons. The Rh hybridization box test showed that there was one RHD negative allele.@*CONCLUSION@#This specimen is Del type caused by deletion of RHD exon 9.

Tanshinone IIA promotes reverse cholesterol transport to improve atherosclerosis / 中国药理学通报

Aim To explore the effect of tanshinone II A (Tan II A) on reverse cholesterol transport in atherosclerosis model mice and RAW264. 7 cells and the underlying mechanism. Methods Thirty-two male LDLR -/- mice were randomly divided into four groups. These mice were fed with normal diet or high fat diet for 12 weeks. The control group and model group were given normal saline. Tan II A group and atorvastatin group were given Tan II A solution and atorvastatin solution for 12 weeks. RAW264. 7 cells were induced with oxidized low-density lipoprotein (ox-LDL) 100 mg • L-

Mechanism of myeloid differentiation factor 2 on mediating sepsis-associated encephalopathy / 中华危重病急救医学

OBJECTIVE@#To investigate the role and underlying mechanism of human myeloid differentiation protein 2 (MD2) in the process of neuronal death induced by lipopolysaccharide (LPS) by establishing an in vitro model of sepsis-associated encephalopathy (SAE) by LPS.@*METHODS@#Healthy C57BL/6J mice at 14-18 days of gestation were selected, and brain cortical tissue was taken from fetal mice. Neurons were stimulated with 0 (control), 1, 5 and 10 g/L of LPS for 24 hours. The release of lactate dehydrogenase (LDH) was detected and the death of neurons was observed. Enzyme-linked immunosorbent assay (ELISA) was used to detect the levels of inflammatory factors interleukins (IL-6, IL-1β), in order to determine the optimal dose of LPS for establishing an in vitro neuroinflammation model of SAE. The cells were divided into blank control group and LPS group. Terminal deoxynucleotidyl transferase-mediated dUTP nick-end-labeling (TUNEL) was used to discover apoptosis. Western blotting was used to detect the expression of the relevant protein markers activated caspase-3, necroptosis-associated protein neuronal receptor-interacting serine/threonine-protein kinase 3 (RIPK3) and phosphorylated RIPK3 (p-RIPK3). Immunofluorescence chemical staining was used to detect the expressions of p-RIPK3 and microtubule-associated protein 2 (MAP2) to evaluate the type of cell death and the degree of neuronal death. Western blotting was used to detect MD2 expression. Immunofluorescence chemical staining was performed to observe the expression and distribution of p-RIPK3 and MD2 in neurons to assess whether MD2 was involved in the inflammatory response promoting neuronal death. In addition, the cells were divided into blank control group, LPS group, and MD2 interfering peptide group (LPS+TC group), and the levels of IL-6, IL-1β and LDH were detected to evaluate whether interfering with MD2 can alleviate LPS induced neuroinflammation.@*RESULTS@#10 g/L LPS induced notable neuronal death, and the release of LDH in neurons stimulated with this concentration for 24 hours was significantly higher than that in the blank control group (relative release: 1.45±0.04 vs. 1.00±0.00, P < 0.01), indicating apoptosis and necroptosis occurred in neurons, and the levels of inflammatory factors IL-6 and IL-1β were remarkable increased [IL-6 (relative level): 1.94±0.04 vs. 1.00±0.00, IL-1β (relative level): 1.53±0.09 vs. 1.00±0.00, both P < 0.01]. Compared with the blank control group, the apoptosis of cells, cleaved-caspase-3 expression, the p-RIPK3/RIPK3 ratio, and p-RIPK3 expression around neurons in the LPS group were significantly increased [cleaved-caspase-3/GAPDH: 1.55±0.10 vs. 1.00±0.00, P < 0.01; p-RIPK3/RIPK3 ratio (relative value): 1.54±0.06 vs. 1.00±0.00, P < 0.05], which suggested that typical apoptosis and necroptosis apoptosis occurred in neurons in the septic environment. Furthermore, MD2 expression was significantly increased in the LPS group compared with the blank control group (MD2/GAPDH: 1.91±0.07 vs. 1.00±0.00, P < 0.01), and MD2 expression around neurons was increased, indicating that LPS-induced MD2 upregulation may play a key role in neuroinflammation and induction of neuronal death in sepsis. In addition, compared with the LPS group, the MD2-interfering peptide could reduce the expression levels of inflammatory factors IL-6 and IL-1β [IL-6 (relative level): 1.16±0.08 vs. 1.94±0.04, IL-1β (relative level): 1.15±0.05 vs. 1.75±0.09, both P < 0.01] and decrease LDH release (relative release: 1.09±0.01 vs. 1.44±0.04, P < 0.05).@*CONCLUSIONS@#LPS induced neuronal inflammatory responses via MD2, which ultimately leads to apoptosis and necroptosis. Interfering with MD2 reduces inflammation and inhibits neuronal death.

Blockade of the Dopamine D3 Receptor Attenuates Opioids-Induced Addictive Behaviours Associated with Inhibiting the Mesolimbic Dopamine System / 神经科学通报·英文版

Opioid use disorder (OUD) has become a considerable global public health challenge; however, potential medications for the management of OUD that are effective, safe, and nonaddictive are not available. Accumulating preclinical evidence indicates that antagonists of the dopamine D3 receptor (D3R) have effects on addiction in different animal models. We have previously reported that YQA14, a D3R antagonist, exhibits very high affinity and selectivity for D3Rs over D2Rs, and is able to inhibit cocaine- or methamphetamine-induced reinforcement and reinstatement in self-administration tests. In the present study, our results illustrated that YQA14 dose-dependently reduced infusions under the fixed-ratio 2 procedure and lowered the breakpoint under the progressive-ratio procedure in heroin self-administered rats, also attenuated heroin-induced reinstatement of drug-seeking behavior. On the other hand, YQA14 not only reduced morphine-induced expression of conditioned place preference but also facilitated the extinguishing process in mice. Moreover, we elucidated that YQA14 attenuated opioid-induced reward or reinforcement mainly by inhibiting morphine-induced up-regulation of dopaminergic neuron activity in the ventral tegmental area and decreasing dopamine release in the nucleus accumbens with a fiber photometry recording system. These findings suggest that D3R might play a very important role in opioid addiction, and YQA14 may have pharmacotherapeutic potential in attenuating opioid-induced addictive behaviors dependent on the dopamine system.

Cytokine receptor-like factor 1 (CRLF1) promotes cardiac fibrosis via ERK1/2 signaling pathway / 浙江大学学报（英文版）（B辑：生物医学和生物技术）

Cardiac fibrosis is a cause of morbidity and mortality in people with heart disease. Anti-fibrosis treatment is a significant therapy for heart disease, but there is still no thorough understanding of fibrotic mechanisms. This study was carried out to ascertain the functions of cytokine receptor-like factor 1 (CRLF1) in cardiac fibrosis and clarify its regulatory mechanisms. We found that CRLF1 was expressed predominantly in cardiac fibroblasts. Its expression was up-regulated not only in a mouse heart fibrotic model induced by myocardial infarction, but also in mouse and human cardiac fibroblasts provoked by transforming growth factor-‍β1 (TGF‍-‍β1). Gain- and loss-of-function experiments of CRLF1 were carried out in neonatal mice cardiac fibroblasts (NMCFs) with or without TGF-‍β1 stimulation. CRLF1 overexpression increased cell viability, collagen production, cell proliferation capacity, and myofibroblast transformation of NMCFs with or without TGF‍-‍β1 stimulation, while silencing of CRLF1 had the opposite effects. An inhibitor of the extracellular signal-regulated kinase 1/2 (ERK1/2) signaling pathway and different inhibitors of TGF-‍β1 signaling cascades, comprising mothers against decapentaplegic homolog (SMAD)‍-dependent and SMAD-independent pathways, were applied to investigate the mechanisms involved. CRLF1 exerted its functions by activating the ERK1/2 signaling pathway. Furthermore, the SMAD-dependent pathway, not the SMAD-independent pathway, was responsible for CRLF1 up-regulation in NMCFs treated with TGF-‍β1. In summary, activation of the TGF-‍β1/SMAD signaling pathway in cardiac fibrosis increased CRLF1 expression. CRLF1 then aggravated cardiac fibrosis by activating the ERK1/2 signaling pathway. CRLF1 could become a novel potential target for intervention and remedy of cardiac fibrosis.

Titin: structure, isoforms and functional regulation / 生理学报

Titin, the largest known protein in the body expressed in three isoforms (N2A, N2BA and N2B), is essential for muscle structure, force generation, conduction and regulation. Since the 1950s, muscle contraction mechanisms have been explained by the sliding filament theory involving thin and thick muscle filaments, while the contribution of cytoskeleton in force generation and conduction was ignored. With the discovery of insoluble protein residues and large molecular weight proteins in muscle fibers, the third myofilament, titin, has been identified and attracted a lot of interests. The development of single molecule mechanics and gene sequencing technology further contributed to the extensive studies on the arrangement, structure, elastic properties and components of titin in sarcomere. Therefore, this paper reviews the structure, isforms classification, elastic function and regulatory factors of titin, to provide better understanding of titin.

Efficacy and safety profiles of dolutegravir plus lamivudine vs . bictegravir/emtricitabine/tenofovir alafenamide in therapy-naïve adults with HIV-1 / 中华医学杂志(英文版)

BACKGROUND@#Dual regimen dolutegravir (DTG) plus lamivudine (3TC) has demonstrated non-inferior efficacy compared to DTG-based three-drug regimens (3DRs), yet directly comparative data regarding the efficacy and safety of DTG + 3TC and bictegravir/emtricitabine/tenofovir alafenamide (B/F/TAF) for therapy-naïve people with human immunodeficiency virus (HIV)-1 (PWH) are still limited. We aimed to assess the antiviral potency and safety profiles of DTG + 3TC vs. B/F/TAF based on antiretroviral therapy (ART)-naïve PWH in China.@*METHODS@#This retrospective multicenter study enrolled PWH initiating ART with DTG + 3TC or B/F/TAF from 2020 to 2022 in Guangdong and Guangxi. We analyzed response rates based on target not detected (TND) status using intention-to-treat (ITT) analysis. Subgroups were formed based on baseline viral load (VL) (<100,000 vs . ≥100,000 copies/mL) and CD4 + cell count (<200 vs . ≥200 cell/µL). Median time to TND VL was assessed by Kaplan-Meier method. We also measured changes from baseline in CD4 + cell counts, CD4/CD8 ratio, lipid parameters, weight, creatinine (Cr), estimated glomerular filtration rate (eGFR), and drug-related adverse effects (DRAEs).@*RESULTS@#We enrolled 280 participants, including 137 (48.9%) on DTG + 3TC and 143 (51.1%) on B/F/TAF. At week 48, 96.4% (132/137) on DTG+3TC and 100% (143/143) on B/F/TAF achieved TND ( P = 0.064). At week 12, TND responses were higher with B/F/TAF (78.3% [112/143]) than DTG+3TC (30.7% [42/137]) ( P <0.001). This trend held across subgroups. B/F/TAF achieved TND faster (12 weeks) than DTG+3TC (24 weeks) ( P <0.001). No differences were seen in CD4 + cell count and CD4/CD8 ratio, except in the high-VL subgroup, where B/F/TAF showed better recovery. DRAEs were significantly lower with B/F/TAF (4.9% [7/143]) than with DTG + 3TC (13.1% [18/137]) ( P = 0.016). Lipid parameters, body weight, and Cr increased in both groups over 48 weeks, with DTG+3TC showing a more favorable effect on triglycerides, high-density lipoprotein (HDL) cholesterol, and weight gain.@*CONCLUSIONS@#In this real-life study, B/F/TAF led to a faster viral decline and fewer DRAEs compared to DTG+3TC. No significant difference was observed in the TND rate at week 48, regardless of baseline VL and CD4 + cell count. CD4 + recovery was superior for B/F/TAF in participants with high VL. The DTG + 3TC regimen had less impact on metabolic changes than B/F/TAF.

Analysis on the Current Status and Influencing Factors of Narrative Nursing Knowledge, Attitude, and Practice among Nurses in Grade A Tertiary Hospitals / 中国医学伦理学

【Objective:】 To understand the current status of narrative nursing knowledge, attitude, and practice (KAP) among nurses in grade A tertiary hospitals, and to provide a basis for the development of narrative nursing in relevant areas. 【Methods:】 Using convenience sampling methods, 931 nurses from three grade A tertiary hospitals in Xi’an were selected as subjects. A cross-sectional survey was conducted using the Clinical Nurses’ Narrative Nursing Knowledge and Trustworthiness Questionnaire and the General Self-Efficacy Scale. Multiple linear regression analysis was used to explore the influencing factors of nurses’ narrative nursing KAP. 【Results:】 The scores on the three dimensions of narrative nursing KAP were (23.70±2.99) points, (31.69±5.92) points, and (30.26±5.32) points, respectively. Nursing workload, general self-efficacy, professional title, and nursing satisfaction were the influencing factors of nurses’ narrative nursing knowledge dimension (P<0.05). There were statistically significant differences in nurses’ narrative nursing attitude dimension among nursing workload, general self-efficacy, professional title, monthly income, and nursing satisfaction (P<0.05). Nursing workload, general self-efficacy, nursing satisfaction, and accompanying experience were the influencing factors of nurses’ narrative nursing behavior dimension (P<0.05). 【Conclusion:】 Nurses in grade A tertiary hospitals have moderate narrative nursing knowledge, positive attitudes, and poor practice execution. The high nursing workload is the main barrier factor for the current development of narrative nursing. Nursing managers should actively build a diversified training system and guarantee system to boost the development of narrative nursing in clinical nursing work, and further promote the development of narrative nursing concepts.

Study on the Construction of a Doctor-patient Community from the Perspective of Struggle Spirit / 中国医学伦理学

Maintaining a harmonious doctor-patient relationship is an important foundation for the development of health care, and building a doctor-patient community is a key measure to maintain the harmonious doctor-patient relationship. To accelerate the construction of a doctor-patient community, it is necessary to establish a sense of struggle, grasp the connotation of a doctor-patient community, and understand its predicament, so as to propose targeted strategies for constructing a doctor-patient community. A doctor-patient community is a cooperative community, not a compromise community. The purpose of struggle is to better unite and cooperate. A doctor-patient community established under the guidance of struggle spirit is more united, more cohesive, and more effective. In the context of the new era, building a doctor-patient community faces the challenges of doctors being busy with "treatment" and neglecting emotional communication between doctors and patients, patients looking for "curing" and generating the illusion of omnipotence in medical skills, schools focusing on "medical skill" and weakening the cultivation of students’ humanities, the society lacking "integration" and disrupting the harmonious doctor-patient environment, etc. Building a doctor-patient community should strengthen emotional communication between doctors and patients, correct patients’ cognitive biases, enhance humanistic education, and create a good medical environment, with a view to promoting the healthy development of a doctor-patient community and facilitating the construction of the healthy China strategy.

Observation on the effect of modified buffy coat centrifugal canning method on improving the quality of platelet concentrates / 中国输血杂志

【Objective】 To evaluate the quality of platelet concentrates (PCs) prepared by traditional and modified buffy coat centrifugal canning methods, and to explore the effect of modified buffy coat centrifugal canning method on improving the quality of PCs. 【Methods】 The buffy coat centrifugal canning methods was divided into traditional group and modified group. In the traditional group, the buffy coat component bag and empty bag were directly combined layer by layer and vertically canned for light centrifugation. In the modified group, a foam spacer was added between the buffy coat component bag and the empty bag for light centrifugation layer by layer. The effects of the two groups of centrifugal canning methods on the preparation quality of PCs were observed. 【Results】 The platelet content in PCs prepared by the modified buffy coat centrifugal canning method was significantly higher than that in the traditional group, and the mixed amount of red blood cells was lower than that in the traditional group (P0.05), the qualified rates of platelet content and mixed red blood cell in the modified group were higher than those in the traditional group (P<0.05). 【Conclusion】 The modified centrifugal canning method with buffy coat can improve the quality of PCs, which is convenient and cheap, and is worth popularizing.

Curative Effect of Percutaneous Transforaminal Endoscopic Spine System in the Treatment of Lumbar Disc Herniation Complicated with Nerve Root Canal Stenosis / 中山大学学报(医学科学版)

ObjectiveTo explore the clinical efficacy of percutaneous transforaminal endoscopic spine system （TESSYS） in the treatment of lumbar disc herniation （LDH） complicated with nerve root canal stenosis. MethodsA retrospective study was done on 40 LDH patients complicated with nerve root canal stenosis who underwent TESSYS in our hospital from April 2019 to April 2021. The clinical efficacy of the patients was evaluated by the modified Mac Nab criteria 12 months after the surgery. We also measured and analyzed the scores of visual analogue scale （VAS）， Oswestry disability index （ODI） and Japanese orthopaedic association （JOA）， the changes of structural parameters of lumbar spine and inflammatory factor levels preoperatively， 6 and 12 months after the surgery. ResultsAll the 40 cases successfully underwent the surgery and follow-ups， with a 12-month post-operative clinical excellent and good rate of 90%. The preoperative， 6-month and 12-month post-operative VAS scores were （7.38±2.06）， （2.36±0.87） and （1.62±0.82）， respectively. The respective ODI scores were （55.54±11.19）， （26.52±7.61） and （18.14±4.36）； JOA scores （13.93±2.10）， （20.26±1.35） and （22.34±1.88）. The post-operative scores of VAS， ODI and JOA were significantly improved compared with those before the surgery （P<0.05）. The preoperative and post-operative lumbosacral angles were （37.23±6.84）° and （27.37±4.31）°， respectively， with the respective lumbar curvatures of （13.48±3.06） mm and （22.36±4.51） mm. The post-operative lumbosacral angle and lumbar curvature were significantly improved compared with those before the surgery （P<0.05）. The preoperative and post-operative high-sensitivity C-reactive protein （hs-CRP） levels were （3.43±0.61） mg/L and （5.18±0.70） mg/L， respectively， with the respective tumor necrosis factor alpha （TNF-α） levels of （1.44±0.27） mg/L and （2.07±0.44） mg/L. The post-operative levels of hs-CRP and TNF-α were significantly higher than those before the surgery （P<0.05）. ConclusionIn the treatment of LDH complicated with nerve root canal stenosis， TESSYS achieves a good clinical effect， improves the structure and function of the lumbar spine， reduces the degree of lumbar spine pain， and has a mild post-operative inflammatory reaction.