Single-cell RNA sequencing-guided fate-mapping toolkit delineates the contribution of yolk sac erythro-myeloid progenitors

Erythro-myeloid progenitors of the yolk sac that originates during early embryo development has been suggested to generate tissue-resident macrophage, mast cell, and even endothelial cell populations from fetal to adult stages. However, the heterogeneity of erythro-myeloid progenitors (EMPs) is not well characterized. Here, we adapt single-cell RNA sequencing to dissect the heterogeneity of EMPs and establish several fate-mapping tools for each EMP subset to trace the contributions of different EMP subsets. We identify two primitive and one definitive EMP subsets from the yolk sac. In addition, we find that primitive EMPs are decoupled from definitive EMPs. Furthermore, we confirm that primitive and definitive EMPs give rise to microglia and other tissue-resident macrophages, respectively. In contrast, only Kit+ Csf1r- primitive EMPs generate endothelial cells transiently during early embryo development. Overall, our results delineate the contribution of yolk sac EMPs more clearly based on the single-cell RNA sequencing (scRNA-seq)-guided fate-mapping toolkit.

Definitive Radiotherapy in Patients with Clinical T1N0M0 Esophageal Squamous Cell Carcinoma: A Multicenter Retrospective Study

PURPOSE/OBJECTIVE(S)

In this study, we aimed to assess the failure pattern and survival outcomes and to analyze the optimal treatment field of definitive RT for T1N0M0 esophageal squamous cell carcinoma (ESCC).

MATERIALS/METHODS

We performed a retrospective analysis in a multi-institutional cohort of patients with histologically confirmed T1N0M0 ESCC. We included patients who underwent RT with definitive aim from 2010 to 2019. Patterns of failure were demonstrated as in-field locoregional, out-field locoregional and distant metastasis. In the survival analysis, freedom from locoregional recurrence and their association with clinicopathologic risk factors were analyzed. We performed a propensity score matching in the cT1b patients to adjust for the heterogeneity of radiation technique, radiation dose and the use of concurrent chemotherapy.

RESULTS

A total of 168 patients were included with a median follow-up of 34.0 months, and there were 20 cT1a, 94 cT1b and 24 cT1x, (cT1, not otherwise specified) patients. The rates of all and locoregional failure were 26.9% and 23.1% for cT1a and 25.0% and 22.4% for cT1b patients. 10 (10.6%) patients experienced grade ≥ 3 adverse events. Among 116 cT1b patients, 69 patients received elective nodal irradiation (ENI) and 47 patients received involved field irradiation (IFI). After propensity score matching, the 3-year FFLRR rate was 84.5% (95% Confidence Interval, 71.0 - 92.1%). There was no significant difference between the ENI and IFI patients in FFLRR (Log-rank P = 0.831). In the multivariate analysis, the use of concurrent chemotherapy was the only factor marginally associated with FFLRR (Hazard ratio, 0.17; 95% CI, 0.02 - 1.13; P = 0.067).

CONCLUSION

cT1a patients who cannot receive endoscopic resection, showed similar rates of failure compared with cT1b patients, which questioned the accuracy of the staging and raised the need for through treatment such as chemoradiotherapy. In cT1b patients, IFI using dose of 50 to 60 Gy with concurrent chemotherapy could be a reasonable treatment option.

Prognostic Value of Depth of Invasion in Squamous Cell Carcinoma of the Oral Cavity of Size 4 cm or Less

PURPOSE/OBJECTIVE(S)

We aimed to evaluate the role of the depth of invasion (DOI) as an independent prognostic factor in the absence of other adverse features in squamous cell carcinoma (SqCC) of the oral cavity with a size of 4 cm or less.

MATERIALS/METHODS

We performed a retrospective analysis in a multi-institutional cohort of patients with oral cavity SqCC, size of 4 cm or less. We included those who were treated with upfront surgery with negative resection margins from 2010 to 2021 and those with one or no nodal metastasis. Those who were treated with postoperative radiotherapy were excluded. The DOI and other adverse features, such as close resection margins, lymphovascular invasion, perineural invasion, and nodal metastasis, were evaluated in univariate and multivariate analyses for their association with locoregional recurrence (LRR).

RESULTS

A total of 155 patients were included with a median follow-up of 23.7 months. 56 patients (36.1%) had DOI greater than 5 mm. 26 patients (16.8%) experienced LRR and one experienced distant metastasis. Multivariate analysis showed that DOI was the only prognostic factor associated with a higher rate of LRF (p = 0.004). The 2-year LRF rates of those with DOI ≤ 5 mm and DOI > 5mm were 4.7% and 30.3%, respectively.

CONCLUSION

This study implies that DOI greater than 5 mm may be an independent prognostic factor of the SqCC of the OCC and may be indicated for adjuvant radiotherapy.

Serum human epidermal growth factor receptor-2 extracellular domain, carcinoma embryonic antigen and carbohydrate antigen 15-3 combined detection in early diagnosis of breast cancer

The multi-markers combined detection can make up for the deficiency of single marker detection and significantly increase the positive detection rates of tumors. This study aimed to assess the performance of serum HER-2 extracellular domain (HER-2/neu ECD), carcinoembryonic antigen (CEA), and cancer antigen 15-3 (CA15-3) in early screening and auxiliary diagnosis of breast cancer. The HER-2, CEA, and CA15-3 serum levels were measured in 164 healthy volunteers, 111 patients with benign nodules (BN), 123 with early breast cancer (EBC), and 25 with advanced breast cancer. In distinguishing health and EBC, the sensitivity and specificity of joint detection of HER-2, CEA, and CA15-3 were 96.75% and 96.95%, respectively; the accuracy was up to 96.19%, and the AUC was 0.994. In the cohort for distinguishing BN from EBC, serum HER-2, CEA, and CA15-3 sensitivities were 77.03%, 75.27%, and 48.65%, respectively. Combined with three markers, the sensitivity was increased to 84.46%, the AUC was 0.834. All in all, through the combined detection of serum HER-2, CEA and CA15-3 levels in healthy volunteers, BN and EBC, our study found that this method can significantly improve the diagnosis level of breast cancer, suggesting that the three markers panel can be used as an effective tool to improve the early screening level, early diagnosis, and clinical intervention of breast cancer.

[Combined effect of PNPLA3 rs738409 and UGT1A1 rs10929303 gene polymorphisms on nonalcoholic fatty liver disease in children]

Objective: To investigate the combined effects of patatin-like phospholipase domain containing 3 (PNPLA3) rs738409 (C > G) and uridine diphosphate glucuronosyltransferase 1A1 (UGT1A1) rs10929303 (C > T) on nonalcoholic fatty liver disease (NAFLD) in children and adolescents so as to provide scientific evidence for NAFLD genetic research. Methods: 1 027 children and adolescents aged 7-18 were selected as the research subjects. The general situation, past medical history, height and body weight measurements, and B- mode ultrasound test of the liver were investigated by dedicated full-time personnel. In addition, the morning fasting venous blood was collected to measure the blood biochemical indicators. DNA was extracted and genotyped for PNPLA3 rs738409 and UGT1A1 rs10929303. Logistic regression analysis was used to analyze the association and combined effect of the two gene polymorphisms and NAFLD. Statistical analysis was performed by t-test, Mann-Whitney U test, or c2 test according to different data. Results: The GG genotype of PNPLA3 rs738409 and the CC genotype of UGT1A1 rs10929303 were associated with an increased risk of developing NAFLD in children by 89% (OR = 1.89, 95% CI: 1.11-3.23, P = 0.019) and 96% (OR = 1.96, 95% CI: 1.21-3.17, P = 0.006), respectively, while the concurrent risk of NAFLD in those who carried the above two genotypes increased by 306% compared with those who did not carry both genotypes (OR = 4.06, 95% CI: 1.90 ~ 8.66, P < 0.001). Conclusion: The combined effect of PNPLA3 and UGT1A1 gene polymorphisms can significantly increase the risk of NAFLD in children, providing new evidence for elucidating the genetic susceptibility to NAFLD.

[Influence of rs2587552 polymorphism of DRD2 gene on the effect of a childhood obesity intervention: A prospective, parallel-group controlled trial]

OBJECTIVE

To explore the association between rs2587552 polymorphism (has a strong lin-kage disequilibrium with rs1800497 which had been found in many studies to be related to obesity, r²=0.85) of DRD2 gene and the effect of a childhood obesity intervention in Chinese population, and provide a scientific basis for future personalized childhood obesity intervention based on genetic background.

METHODS

From a multi-center cluster randomized controlled trial studying the effect of a childhood obesity intervention, we enrolled 382 children from 8 primary schools (192 and 190 children from intervention and control groups, respectively) in Beijing as study subjects. Saliva was collected and DNA was extracted to detect the rs2587552 polymorphism of DRD2 gene, and the interactions between the gene and study arms on childhood obesity indicators [including body weight, body mass index (BMI), BMI Z-score, waist circumference, hip circumference, waist-to-hip ratio, waist-to-height ratio, and body fat percentage] were analyzed.

RESULTS

No association was found between rs2587552 polymorphism and the changes in hip circumference or body fat percentage in the intervention group (P>0.05). However, in the control group, children carrying the A allele at DRD2 rs2587552 locus showed a greater increase in hip circumference and body fat percentage compared with those not carrying A allele (P < 0.001). There were interactions between rs2587552 polymorphism of DRD2 gene and study arms on the changes in hip circumference and body fat percentage (P=0.007 and 0.015, respectively). Compared with the control group, children in the intervention group carrying the A allele at DRD2 rs2587552 locus showed decrease in hip circumference by (-1.30 cm, 95%CI: -2.25 to -0.35, P=0.007) and decrease in body fat percentage by (-1.34%, 95%CI: -2.42 to -0.27, P=0.015) compared with those not carrying A allele. The results were consistent between the dominant model and the additive model (hip circumfe-rence: -0.66 cm, 95%CI: -1.28 to -0.03, P=0.041; body fat percentage: -0.69%, 95%CI: -1.40 to 0.02, P=0.056). No interaction was found between rs2587552 polymorphism and study arms on the changes in other childhood obesity-related indicators (P>0.05).

CONCLUSION

Children carrying the A allele at rs2587552 polymorphism of DRD2 gene are more sensitive to intervention and showed more improvement in hip circumference and body fat percentage after the intervention, suggesting that future personalized childhood obesity lifestyle intervention can be carried out based on the rs2587552 polymorphism of DRD2 gene.

National trends in suicide-related behaviors among youths between 2005-2020, including COVID-19: a Korean representative survey of one million adolescents

OBJECTIVE

It is difficult to conclude that COVID-19 is associated with a decrease in the suicide attempts rate by comparing only a short-term period. Therefore, it is necessary to examine attempted suicide rates through a trend analysis over a longer period. This study aimed to investigate an estimated long-term trend regarding the prevalence of suicide-related behaviors among adolescents in South Korea from 2005 to 2020, including COVID-19.

SUBJECTS AND METHODS

We sourced data from a national representative survey (Korea Youth Risk Behavior Survey) and analyzed one million Korean adolescents aged 13 to 18 years (n=1,057,885) from 2005 to 2020. The 16-year trends regarding the prevalence of sadness or despair and suicidal ideation and attempt and the trend changes before and during COVID-19.

RESULTS

Data of 1,057,885 Korean adolescents was analyzed (weighted mean age, 15.03 years; males, 52.5%; females, 47.5%). Although the 16-year trend in the prevalence of sadness or despair and suicide ideation and attempt consistently decreased (prevalence of sadness or despair between 2005-2008, 38.0% with 95% confidence interval [CI], 37.7 to 38.4 vs. prevalence in 2020, 25.0% [24.5 to 25.6]; suicide ideation between 2005-2008, 21.9% [21.6 to 22.1] vs. prevalence in 2020, 10.7% [10.3 to 11.1]; and suicide attempt between 2005-2008, 5.0% [4.9 to 5.2] vs. prevalence in 2020, 1.9% [1.8 to 2.0]), the downward slope decreased during COVID-19 (βdiff in sadness, 0.215 with 95% CI 0.206 to 0.224; βdiff in suicidal ideation, 0.245 [0.234 to 0.256]; and βdiff in suicide attempt, 0.219 [0.201 to 0.237]) compared with pre-pandemic period.

CONCLUSIONS

This study found that the observed risk of suicide-related behaviors during the pandemic was higher than expected through long-term trend analysis of the prevalence of sadness/despair and suicidal ideation and attempts among South Korean adolescents. We need a profound epidemiologic study of the change in mental health due to the pandemic's impact and the establishment of prevention strategies for suicide ideation and attempt.

Trends in body mass index changes among Korean adolescents between 2005-2020, including the COVID-19 pandemic period: a national representative survey of one million adolescents

OBJECTIVE

The impact of the coronavirus disease 2019 (COVID-19) pandemic on weight gain in children and adolescents remains unknown. We aimed to identify an estimated 15-year trend in mean body mass index (BMI) changes and prevalence of obesity and overweight among Korean adolescents from 2005 to 2020, including the period of the COVID-19 pandemic.

PATIENTS AND METHODS

We analyzed data taken from a nationwide survey (Korea Youth Risk Behavior Survey), between 2005 and 2020. Representative samples of one million Korean adolescents aged 13-18 years (n=1,057,885) were examined. The 15-year trends in mean BMI and proportion of obesity or overweight, and the changes due to the COVID-19 pandemic were analyzed.

RESULTS

The data of 1,057,885 Korean adolescents were analyzed (mean age: 14.98 years; females, 48.4%). The estimated weighted mean BMI was 20.5 kg/m2 [95% confidence interval (CI), 20.4-20.5] from 2005 to 2008 and 21.5 kg/m2 (95% CI, 21.4-21.6) in 2020 (during the COVID-19 pandemic). Although the 15-year trend of mean BMI gradually increased, the change in mean BMI before and during the pandemic significantly lessened (βdiff, -0.027; 95% CI, -0.028 to -0.026). The 15-year (2005-2020) trend changes in the prevalence of obesity and overweight were similar (obesity prevalence from 2005-2008, 3.2%; 95% CI, 3.1-3.3 vs. obesity prevalence in 2020, 8.6%; 95% CI, 8.2-9.0; βdiff, -0.309; 95% CI, -0.330 to -0.288).

CONCLUSIONS

The 15-year trend of overall mean BMI and obesity and overweight prevalence demonstrated a significant increase; however, its slope decreased during the pandemic. These landmark results suggest the need for the development of precise strategies to prevent pediatric obesity and overweight during the COVID-19 pandemic.

Remifentanil requirement for acceptable intubation conditions with two different doses of ketamine without a neuromuscular blocking agent in pediatric patients

OBJECTIVE

The optimal remifentanil concentration for improving intubation conditions when intubation is performed without neuromuscular blocking agents (NMBAs) but with ketamine as an induction agent remains unknown. Here, we aimed to identify the effective bolus doses of remifentanil required to achieve acceptable intubation conditions upon anesthesia induction with 1 or 2 mg/kg ketamine without NMBAs.

PATIENTS AND METHODS

In this prospective, double-blinded, randomized up-down sequential allocation study, we enrolled pediatric patients aged 3-12 years undergoing general anesthesia for inguinal hernia surgery. The patients were randomly allocated to one of two groups to receive either ketamine 1.0 mg/kg (K1 group) or 2.0 mg/kg (K2 group) intravenously until seven success-failure pairs were achieved. The remifentanil dose for each patient was determined using the modified Dixon's up-and-down method with an initial dose of 2.5 μg/kg and a step size of 0.5 μg/kg.

RESULTS

In total, 51 patients (22 in the K1 group and 29 in the K2 group) were enrolled. The effective dose (ED)50s of remifentanil for obtaining clinically acceptable intubation conditions under anesthesia induction with ketamine but without NMBAs was 3.2 μg/kg in the K1 group and 1.6 μg/kg in the K2 group. High-dose remifentanil with 1 mg/kg ketamine was associated with more severe chest wall rigidity and lower mean blood pressure and heart rate than was low-dose remifentanil with 2 mg/kg ketamine.

CONCLUSIONS

The ED50 of remifentanil required for clinically acceptable intubation conditions with anesthesia induction using 1 mg/kg ketamine without NMBAs in pediatric patients was twice that when using 2 mg/kg ketamine. The combination of 2 mg/kg ketamine and remifentanil was better at preventing chest wall rigidity.

Comparing Ictal Cardiac Autonomic Changes in Patients with Frontal Lobe Epilepsy and Temporal Lobe Epilepsy by Ultra-Short-Term Heart Rate Variability Analysis

Background and Objectives: Abnormal epileptic discharges in the brain can affect the central brain regions that regulate autonomic activity and produce cardiac symptoms, either at onset or during propagation of a seizure. These autonomic alterations are related to cardiorespiratory disturbances, such as sudden unexpected death in epilepsy. This study aims to investigate the differences in cardiac autonomic function between patients with temporal lobe epilepsy (TLE) and frontal lobe epilepsy (FLE) using ultra-short-term heart rate variability (HRV) analysis around seizures. Materials and Methods: We analyzed electrocardiogram (ECG) data recorded during 309 seizures in 58 patients with epilepsy. Twelve patients with FLE and 46 patients with TLE were included in this study. We extracted the HRV parameters from the ECG signal before, during and after the ictal interval with ultra-short-term HRV analysis. We statistically compared the HRV parameters using an independent t-test in each interval to compare the differences between groups, and repeated measures analysis of variance was used to test the group differences in longitudinal changes in the HRV parameters. We performed the Tukey-Kramer multiple comparisons procedure as the post hoc test. Results: Among the HRV parameters, the mean interval between heartbeats (RRi), normalized low-frequency band power (LF) and LF/HF ratio were statistically different between the interval and epilepsy types in the t-test. Repeated measures ANOVA showed that the mean RRi and RMSSD were significantly different by epilepsy type, and the normalized LF and LF/HF ratio significantly interacted with the epilepsy type and interval. Conclusions: During the pre-ictal interval, TLE patients showed an elevation in sympathetic activity, while the FLE patients showed an apparent increase and decrease in sympathetic activity when entering and ending the ictal period, respectively. The TLE patients showed a maintained elevation of sympathetic and vagal activity in the pos-ictal interval. These differences in autonomic cardiac characteristics between FLE and TLE might be relevant to the ictal symptoms which eventually result in SUDEP.

[A comparative study of transperitoneal transmesenteric approach versus paracolic sulci approach laparoscopic adrenal tumorectomy for treatment of primary hyperaldosteronism on left side]

Objective: To compare the therapeutic effect of transperitoneal transmesenteric approach versus paracolic sulci approach laparoscopic adrenal tumorectomy for treatment of left-sided primary hyperaldosteronism. Methods: From January 2017 to July 2019, the clinical data of 70 patients with left-sided primary hyperaldosteronism (PHA) who underwent surgery in the First Hospital of Lanzhou University and five other hospitals in Gansu Province were retrospectively analyzed. There are 43 male and 27 female patients. Among them,28 patients were performed transperitoneal transmesenteric approach laparoscopic adrenal tumorectomy and 42 patients were performed transperitoneal paracolic sulci approach laparoscopic adrenal tumorectomy. The general information and perioperative data of the two groups were compared. Results: All 70 cases of surgery were successfully completed. As compared with the paracolic sulci approach group, the operation time was significantly shorter in the transmesenteric approach group[(26.7±8.8)vs (38.9±7.1)min,P<0.001)], and the estimated blood loss was less in the transmesenteric approach group[45(30,50) vs 50(40,60)ml,P=0.042]. There was no statistically significant difference in the postoperative hospitalization days between the two groups[(4.4±1.0)vs(4.5±1.0)d, P=0.669)]. The electrolytes and aldosterone to renin ratio returned to a healthy level in the postoperative one month, and the blood pressure also returned to a healthy level in 53 (75.7%) patients. Conclusion: Transperitoneal transmesenteric approach laparoscopic adrenal tumorectomy is safe and feasible, with a short operation time and relatively less estimated blood loss.

[Progress of risk factors for thyroid tumors]

In recent years, both benign and malignant thyroid tumors have grown rapidly in the world, and have become one of the most common tumors in the endocrine system. At present, the pathogenesis of thyroid tumor is still unclear, but more and more studies have found that certain factors are related to the occurrence and development of thyroid tumors. It is of great significance to summarize and analyze these risk factors. This article reviews the research progress of its risk factors reported in recent years, so as to provide a basis for the accuracy and scientific prevention and control of thyroid tumors.

[The expression of LINC00052 during glycidyl methacrylate-induced malignant transformation of 16HBE cells]

Objective: To investigate the expression and role of LINC00052 during glycidyl methacrylate (GMA) -induced malignant transformation of 16HBE cells. Methods: Human bronchial epithelial (16HBE) cells were divided into GMA transformation group and corresponding DMSO control group, and the 10th, 20th and 30th generation cells of each group were collected LncRNA microarrays were used to analysis expression of LINC00052 in different stage of malignant transformation. Bioinformatics analysis was applied and the relative expression of LINC00052 and its potentially target genes was detected by real-time quantification PCR (qPCR) . Results: The results of microarray analysis showed that LINC00052 was up-regulated by 1.32-fold, down-regulated by 1.64-fold and down-regulated by 4.92-fold in the malignant transformation early (P10) , middle term (P20) and late (P30) , respectively, The results of qPCR showed that compared with the DMSO control group, the expression of LINC00052 was up-regulated by 1.55 times, down-regulated by 1.20 times and down-regulated by 2.35 times in P10, P20 and P30, respectively, and the difference was statistically significant (P<0.05) . There was a statistically significant difference in the relative expression of NTRK3 between the GMA transformation group of P10 and P30 generations with the corresponding DMSO control group (P<0.05) . Conclusion: LINC00052 is highly expressed in early time of GMA-induced malignant transformation of 16HBE, and down-regulated in the middle and last stage of malignant transformation and may play a protective role in GMA-induced malignant transformation of 16HBE by influencing the expression of its target gene NTRK3.

[The basic characteristics and medical status of pneumoconiosis patients under different investigation methods]

Objective: To analyze the characteristics of pneumoconiosis patients and the basic status of medical treatment. Methods: Research objects were chosen by stratified sampling method and typical survey method from existing pneumoconiosis patients in China. The survey was carried out from March 2017 to January 2018 in nine provinces including provinces from east, medium and western region in China. Source of pneumoconiosis cases were inpatient cases, outpatient or physical-examined cases and household-investigation cases. The survey mainly included demographic and sociological characteristics, economic status, occupational history and dust exposure history, disease status, work-related injury insurance and social security status and related indicators of pneumoconiosis treatment. Results: Investigated 1037 pneumoconiosis cases which included 186 (19.9%) household-investigation cases, 212 (20.4%) outpatient or physical-examined cases and 639 (61.7%) inpatient cases. Demographic and sociological characteristics, individual monthly income, economic source, occupational history and work-related injury insurance were statistically significant among different source of pneumoconiosis patients (P<0.05) . Among all of the household-investigation cases, there were 74 cases (40.2%) had no income, 117 cases (62.9%) used to work in private enterprises, 36 cases (19.4%) had work-related injuries insurance, 95 cases (51.1%) were at three phase of pneumoconiosis, 108 cases (59.0%) haven't had any drugs for pneumoconiosis. 65 cases (39.4%) haven't went to the clinic, 53 cases (28.5%) hadn't seek medical advice although they needed medical treatment very much. Among all of the outpatient or physical-examined cases, there were 95 cases (46.1%) had no income, 36 cases (17.0%) had work-related injuries Insurance, 139 cases (65.6%) went to the clinic for treatment of pneumoconiosis, 81 cases (38.2%) went to the clinic for more than ten times. Among all the inpatient cases, 310 cases' (49.3%) personal monthly income was above 2000 yuan, 352 cases (55.1%) had work-related injuries Insurance, 588 cases (92.2%) were taking drugs for treatment of pneumoconiosis, 153 canses (24.2%) had hospitalization for than ten times. Conclusion: Household-investigation cases have lower economic conditions, lower rates of Insurance coverage for work-related injuries, severer pneumoconiosis and higher clinical service utilization. Clinical or physical-examined cases have lower economic conditions, lower rates of Insurance coverage for work-related injuries and higher clinical service utilization. Hospitalized cases have better economic conditions, higher rates of insurance coverage for work-related injuries and higher hospitalization service utilization.

[Study on the effect of curculigoside on osteoporosis]

Objective: To investigate the regulation of curculigoside on osteogenic differentiation of MG63 and the protective effect on osteoporosis model mice. Methods: The effects of curculigoside on the survival rate of dexamethasone or H(2)O(2) treated MG63 were detected by methyl thiazolyl tetrazolium (MTT). The specimens were divided into six groups: blank control group, blank administration group, model group (dexamethasone or H(2)O(2) treatment group), low dose group (dexamethasone or H(2)O(2)+1.0 μmol/L curculigoside), medium dose group (dexamethasone or H(2)O(2)+2.5 μmol/L curculigoside) and high dose group (dexamethasone or H(2)O(2)+5.0 μmol/L curculigoside), the sample size of each group was 10. Western blotting was used to detect the expression of osteogenic differentiation-related proteins [type Ⅰ collagen, integrin β1, osteoblast-specific transcription factor (Osterix), osteocalcin and osteopontin] in MG63 cells after 1, 7 and 14 days incubated with 0, 1.0, 2.5 and 5.0 μmol/L of curculigoside. The sample size for each group at each time point was six. The experimental mice were divided into 4 groups: blank group, model group (dexamethasone treatment group), curculigoside low-dose group (dexamethasone+5 mg/kg curculigoside) and high-dose group (dexamethasone+45 mg/kg curculigoside), twenty each. After treatment, the tibia of the mice in each group were subjected to sacral HE staining. The number of osteoclasts was counted, and the levels of oxidative related factors in serum were determined by enzyme-linked immunosorbent assay (ELISA). Results: The MTT results showed that compared with the blank control group [(100±3.7)%], the cell survival rate decreased to (44.1±5.7)% after treatment with dexamethasone, and the survival rate increased to (79.7±3.8)% after treatment with 5.0 μmol/L of curculigoside. The cell survival rate decreased to (59.1±4.7)% after H(2)O(2) treatment, and the survival rate increased to (80.8±3.5)% after treatment with 2.5 μmol/L of curculigoside. The results of Western blotting showed that the expression of type Ⅰ collagen and integrin β1 in MG63 cells was significantly increased after 1.0, 2.5 and 5.0 μmol/L of curculigoside for 1, 7 and 14 days compared with 0 μmol/L of curculigo side for the same period. After increasing (P<0.05), the expression of Osterix and osteocalcin was significantly increased after 1 day of incubation (P<0.05). However, compared with 0 μmol/L curculigoside treatment, the expression of osteopontin in MG63 cells was not significantly different after incubation with 1.0, 2.5, 5.0 μmol/L of curculigoside for 7 and 14 days (P>0.05). Compared with the blank group, the number of tibia osteoclasts in the osteoporosis model group increased. In the low-dose and high-dose groups of curculigoside, the tibia cortex was more continuous and the number of osteoclasts decreased. Compared with the blank group, the activity of oxygen in the osteoporosis model group was significantly increased (P<0.05), and superoxide dimutase and catalase were significantly decreased (P<0.05). Conclusions: Curculigoside promotes the differentiation of MG63 cells by increasing the expression of osteoblast differentiation-related proteins, and has a certain therapeutic effect on dexamethasone-induced osteoporosis mice.

[Association between polymorphism of rs10185316 in insulin-induced gene 2 and blood pressure among children and adolescents]

Objective: To examine the association between polymorphism of rs10185316 in insulin-induced gene 2 (INSIG2) and blood pressure among children and adolescents. Methods: 9 junior middle schools in Dongcheng District of Beijing and 5 schools (3 primary junior middle schools, 2 primary schools) in Haidian District of Beijing were chosen in 2005 and 2007, respectively. According to the Chinese BMI percentile criteria for screening overweight and obesity in school children, we recruited 1 425 overweight or obese children and 605 normal weight children. A total of 2 018 students with complete data of blood pressure and genotype data were included in this study. According to the blood pressure criterion of children and adolescents, 702 participants were categorized into high blood pressure group and 1 316 into normal blood pressure group. Participants' information of gender, age, height, weight and blood pressure were collected by questionnaire and physical examination. Genomic DNA was extracted from peripheral blood sample for genotyping of INSIG2 rs10185316 polymorphism. Multiple linear regression was conducted to analyze the associations between rs10185316 polymorphism in INSIG2 and SBP, DBP, mean arterial pressure (MAP) and pulse pressure. Results: The age, BMI, SBP and DBP of the high blood pressure group were separately (14.3±1.4) years old, (27.3±4.2) kg/m(2), (130.5±10.9) and (76.7±13.3) mmHg (1 mmHg=0.133 kPa), all higher than that of the normal blood pressure group, which were (12.2±2.9) years old, (22.0±4.0) kg/m(2), (104.4±10.9) and(54.6±15.2) mmHg, respectively (all P values<0.001). After age, sex, district and BMI adjusted, compared with the participants carrying INSIG2 rs10185316 CC genotype, CG/GG genotype carriers had lower DBP (β(95%CI):-1.67(-2.84--0.50), P=0.005), higher PP(β(95%CI): 1.91(0.61-3.20), P=0.004), and lower MAP(β(95%CI):=-1.03(-2.01--0.05), P=0.039). Conclusion: INSIG2 rs10185316 polymorphism was associated with DBP, PP and MAP among children and adolescents in an independent way from BMI.

[Relationship between blood routine test parameters and syncopal recurrence of vasovagal syncope in children]

Objective: To explore the relationship between venous blood routine test parameters and syncopal recurrence of children with vasovagal syncope (VVS). Method: Sixty-three children (male 32, female 31) diagnosed as VVS in Department of Pediatrics, Peking University First Hospital from November 2010 to October 2015 were included in a case observational study.Their mean age was (11.2±2.7) years and basic treatment such as predisposing causes avoiding, standing training, autonomic nervous function exercise and oral rehydration salts were advised to them.The clinical data were obtained by out-patient visit and over telephone from December 2015 to January 2016, with a median follow-up period of 10 (4, 26) months. The effects of baseline venous blood routine test parameters, gender, age, and body mass index (BMI) on syncopal recurrence were studied via univariate and multivariate Cox regression analysis.Kaplan-Meier curve was used to evaluate the long-term prognosis. Result: Among the 63 VVS children in this study, 31 cases were diagnosed as VVS vasodepressor type, 4 cases as VVS cardioinhibitory type and 28 cases as VVS mixed type, 16 cases (25%) had experienced recurrence of syncope while 47 cases (75%) had not.The result of univariate analysis of Cox regression showed that baseline platelet count (PLT) (HR=1.012, 95%CI: 1.003-1.022) had a marked impact on the survival rate.And the result of multivariate analysis of Cox regression showed that baseline hemoglobin concentration (HGB) (HR=1.055, 95%CI: 1.007-1.105), mean corpuscular hemoglobin (MCH) (HR=0.612, 95%CI: 0.423-0.884) and PLT(HR=1.015, 95%CI: 1.006-1.024) had significant effects on survival rate of VVS children.In this study, the one-year, two-year, and three-year survival rate were 83% (52/63), 79% (50/63) and 75% (47/63), respectively. Conclusion: The baseline venous blood routine test parameters HGB, MCH and PLT might be the influencing factors of the syncopal recurrence of VVS children.

Differential protein stability and clinical responses of EML4-ALK fusion variants to various ALK inhibitors in advanced ALK-rearranged non-small cell lung cancer

Background

Anaplastic lymphoma kinase (ALK) inhibition using crizotinib has become the standard of care in advanced ALK-rearranged non-small cell lung cancer (NSCLC), but the treatment outcomes and duration of response vary widely. Echinoderm microtubule-associated protein-like 4 (EML4)-ALK is the most common translocation, and the fusion variants show different sensitivity to crizotinib in vitro. However, there are only limited data on the specific EML4-ALK variants and clinical responses of patients to various ALK inhibitors.

Patients and methods

By multiplex reverse-transcriptase PCR, which detects 12 variants of known EML4-ALK rearrangements, we retrospectively determined ALK fusion variants in 54 advanced ALK rearrangement-positive NSCLCs. We subdivided the patients into two groups (variants 1/2/others and variants 3a/b) by protein stability and evaluated correlations of the variant status with clinical responses to crizotinib, alectinib, or ceritinib. Moreover, we established the EML4-ALK variant-expressing system and analyzed patterns of sensitivity of the variants to ALK inhibitors.

Results

Of the 54 tumors analyzed, EML4-ALK variants 3a/b (44.4%) was the most common type, followed by variants 1 (33.3%) and 2 (11.1%). The 2-year progression-free survival (PFS) rate was 76.0% [95% confidence interval (CI) 56.8-100] in group EML4-ALK variants 1/2/others versus 26.4% (95% CI 10.5-66.6) in group variants 3a/b (P = 0.034) among crizotinib-treated patients. Meanwhile, the 2-year PFS rate was 69.0% (95% CI 49.9-95.4) in group variants 1/2/others versus 32.7% (95% CI 15.6-68.4) in group variants 3a/b (P = 0.108) among all crizotinib-, alectinib-, and ceritinib-treated patients. Variant 3a- or 5a-harboring cells were resistant to ALK inhibitors with >10-fold higher half maximal inhibitory concentration in vitro.

Conclusion

Our findings show that group EML4-ALK variants 3a/b may be a major source of ALK inhibitor resistance in the clinic. The variant-specific genotype of the EML4-ALK fusion allows for more precise stratification of patients with advanced NSCLC.

[Augmenter of liver regeneration promotes the proliferation of HL-7702 cells in carbon tetrachloride-induced acute liver injury via increasing autophagy]

Objective: To investigate the protective effect of augmenter of liver regeneration (ALR) against acute liver injury and related mechanisms. Methods: HL-7702 cells were divided into normal control group, carbon tetrachloride (CCl₄)-induced acute liver injury group, ALR+CCl₄ intervention group, 3-methyladenine (3-MA)+CCl₄ intervention group, and ALR+3-MA+CCl₄ intervention group. The ALR+CCl₄ and ALR+3-MA+CCl₄ intervention groups were transfected with ALR plasmids at 8 hours before CCl₄ treatment. All groups except the normal control group were treated with CCl₄, and 30 minutes later, the 3-MA+CCl₄ and ALR+3-MA+CCl₄ intervention groups were treated with 3-MA. The cells were collected at 24 hours after CCl₄ treatment. The HL-7702 cells and supernatant were collected to measure the levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) (IU/L). Western blot was used to measure the levels of ALR, cyclin D, cyclin E, proliferating cell nuclear antigen (PCNA), autophagy-related gene 7 (Atg7), and autophagy genes LC3, p62, and Beclin-1. Quantitative real-time PCR was used to measure the mRNA expression of ALR. A one-way analysis of variance was used for comparison of means between any two groups. Results: The ALR+CCl₄ intervention group had significant increases in the protein and mRNA expression of ALR compared with the acute liver injury group (both P < 0.05). The CCl₄-induced acute liver injury group had significant increases in the protein and mRNA expression of ALR compared with the normal control group (both P < 0.05). Compared with the CCl₄-induced acute liver injury group, the ALR+CCl₄ intervention group had significant reductions in ALT (0.73±0.17 IU/L vs 1.43±0.38 IU/L, P < 0.05) and AST (19.85±1.83 IU/L vs 56.73±6.25 IU/L, P < 0.05) in supernatant, significantly increased expression of cyclin D, cyclin E, PCNA, LC3, Atg7, and Beclin-1 in hepatocytes, and significantly reduced expression of p62, which suggested that ALR protected the liver against acute liver injury, promoted the regeneration of hepatocytes, and enhanced the autophagy of hepatocytes. The ALR+3-MA+CCl₄ intervention group had a significant reduction in the expression of regeneration-associated proteins compared with the ALR+CCl₄ intervention group, while there was no significant difference between the ALR+3-MA+CCl₄ intervention group and 3-MA+CCl₄ intervention group, which suggested that after the inhibition of autophagy, there were significant reductions in the regeneration of hepatocytes and liver regeneration promoted by ALR. Conclusion: ALR can promote the regeneration of hepatocytes in liver parenchyma, which is achieved by the regulation of autophagy.

Genome-Wide Identification of the AP2/ERF Gene Family Involved in Active Constituent Biosynthesis in

Tanshinones and phenolic acids are the major bioactive constituents in the traditional medicinal crop ; however, transcription factors (TFs) are seldom investigated with regard to their regulation of the biosynthesis of these compounds. Here a complete overview of the APETALA2/ethylene-responsive factor (AP2/ERF) transcription factor family in is provided, including phylogeny, gene structure, conserved motifs, and gene expression profiles of different organs (root, stem, leaf, flower) and root tissues (periderm, phloem, xylem). In total, 170 AP2/ERF genes were identified and divided into five relatively conserved subfamilies, including AP2 (25 genes), DREB (61 genes), ethylene responsive factor (ERF; 79 genes), RAV (4 genes), and Soloist (1 gene). According to the distribution of bioactive constituents and the expression patterns of AP2/ERF genes in different organs and root tissues, the genes related to the biosynthesis of bioactive constituents were selected. On the basis of quantitative real-time polymerase chain reaction (qRT-PCR) analysis, coexpression analysis, and the prediction of -regulatory elements in the promoters, we propose that two genes ( and ) regulate tanshinone biosynthesis and two genes ( and ) participate in controlling phenolic acid biosynthesis. The genes related to tanshinone biosynthesis belong to the ERF-B3 subgroup. In contrast, the genes predicted to regulate phenolic acid biosynthesis belong to the ERF-B1 and ERF-B4 subgroups. These results provide a foundation for future functional characterization of AP2/ERF genes to enhance the biosynthesis of the bioactive compounds of .

Chemoprotective and Adjuvant Effects of Immunomodulator Ginsan in Cyclophosphamide-Treated Normal and Tumor Bearing Mice

Ginsan is a polysaccharide extracted from Panax ginseng that is known to have multiple immunomodulatory effects. This study evaluates the chemoprotective effect of ginsan on normal mice and the adjuvant effect on tumor bearing mice in combination with cyclophosphamide (CP). Ginsan (100 mg/kg) was injected 24 h before or after a sublethal dose of a CP treatment. The mice pre-treated with ginsan all died within 10 days whereas up to 53% of the mice post-treated with ginsan increased survival to day 30 compared with only 10% in the CP alone treated group on day 30. The post-treatment of ginsan accelerated the recovery of the bone marrow cells and blood neutrophils by approximately 1.3- and 1.75-fold compared to CP treated control mice at 5 days after CP administration, respectively. These marked differences in activity between the pre- and post-treatment of ginsan with CP was clarified by examining the mRNA expression levels of several cytokines in spleen cells and the self-renewal potential of hematopoietic progenitor cells, CFU-s. The post-treatment with ginsan increased the mRNA expression levels of TNF-α, IL-1β, IL-6, SCF, and GM-CSF with respect to that of the CP alone or ginsan pre-treated group. Similarly, the number of CFU-s was significantly higher in the mice post-treated with ginsan. The inhibition of tumor growth and survival elongation was also observed when ginsan was administered 24 h after the CP treatment. These results show that the post-treatment with ginsan had an immunomodulating and adjuvant effect in combination with CP, which indicates its wide applications in reducing the adverse effects of chemotherapy and improving the general conditions of patients.

Verifying the performance characteristics of the TEG5000 thromboelastogram in the clinical laboratory

OBJECTIVE

To verify the manufacturer performance claims of the TEG5000 with traditional laboratory methods.

MATERIALS AND METHODS

Samples were concurrently measured using the TEG5000 analyzer and either PT, APTT, fibrinogen, factor activities, platelet count, or platelet function testing using whole blood or platelet-rich plasma methods.

RESULTS

Within-run imprecision yielded coefficient of variation (CV) of <5%. There was no correlation of PT or APTT with R time. Only Factor VIII and factor XII activity significantly correlated with R time. There was significant correlation between k and angle with FBG, PLT count, and factor levels. There was weak inverse correlation between angle results and measures of platelet function. All laboratory methods were significantly correlated with MA. There were significant differences between citrated whole blood and fresh citrated plasma for angle and MA, and between fresh and frozen plasma for R time and MA. We demonstrated a high % inhibition noted with normal, drug naïve donors, especially with ADP PLT mapping (50% inhibition), but less so with AA PLT mapping (20% inhibition). For TEG platelet mapping, 19/22 (86.3%) and 17/22 (77.3%) results were concordant with traditional aggregation results.

CONCLUSION

We demonstrated both the lack of, and strong correlation between laboratory tests and the TEG parameters.

HIV-associated neurocognitive disorder in HIV-infected Koreans: the Korean NeuroAIDS Project

OBJECTIVES

HIV-associated neurocognitive disorder (HAND) is an independent predictor of early mortality and is associated with many difficulties in activities of daily living. We sought to determine the prevalence of and risk factors for HAND in HIV-infected Koreans. In addition, we investigated the performance of screening tools and components of neuropsychological (NP) tests for diagnosing HAND.

METHODS

HIV-infected patients were enrolled consecutively from two different urban teaching hospitals in Seoul, South Korea between March 2012 and September 2012. Participants completed a detailed NP assessment of six cognitive domains commonly affected by HIV. The Frascati criteria were used for diagnosing HAND. Four key questions, the International HIV Dementia Scale (IHDS) and Montreal Cognitive Assessment (MoCA)-K were also assessed as potential tools for screening for HAND.

RESULTS

Among the 194 participants, the prevalence of HAND was 26.3%. Asymptomatic neurocognitive impairment and minor neurocognitive disorder accounted for 52.9 and 47.1% of the patients with HAND, respectively. In multivariate analysis, haemoglobin (Hb) level ≤ 13 g/dL (P = 0.046) and current use of a protease inhibitor-based regimen (P = 0.031) were independent risk factors for HAND. The sensitivity and specificity of the IHDS were 72.6 and 60.8%, and those of MoCA-K were 52.9 and 73.4%, respectively. The IHDS (P < 0.001) and MoCA-K (P < 0.001) were both useful for screening for HAND. Among NP tests, the sensitivity and specificity of the Grooved Pegboard Test were 90.2 and 72.0%, and those of the Wisconsin Card Sorting Test were 61.2 and 84.4%, respectively.

CONCLUSIONS

HAND is a prevalent comorbidity in HIV-infected Koreans. Active screening and diagnosis with effective tools, such as the IHDS, MoCA-K and Grooved Pegboard Test, could be used to identify this important complication.

Paratubal cancer found at the time of laparoscopic surgery for adnexal torsion: a case report and literature review

INTRODUCTION

Paratubal cysts are common incidental finding, but malignant paratubal cancers have rare occurrence and have not been sufficiently described and discussed in previous studies.

CASE REPORT

This report describes a case of a 70-year-old female who underwent emergent laparoscopy for adnexal torsion. A serous cystadenocarcinoma arising in a paratubal cyst and accompanied by tubal torsion was revealed by frozen section and successfully treated with laparoscopic cytoreductive surgery and adjuvant chemotherapy.

CONCLUSION

This report is the first case of paratubal cancer with bilateral tubal torsion which was diagnosed and treated with laparoscopic surgery, and the third report describing serous cystadenocarcinoma arising in a paratubal cyst. In the laparoscopic surgery for the paratubal cyst clinically presumed as accompanied with tubal torsion, surgeons should not ignore the possibility of malignancy in spite of the rare incidence of paratubal cancers and the preconception that adnexal malignancies are seldom accompanied by tubal torsion.

CXC motif ligand 12 as a novel diagnostic marker for papillary thyroid carcinoma

BACKGROUND

We subjected chemokine (C-X-C motif) ligand 12 (CXCL12) to immunohistochemistry to determine its utility as a novel diagnostic marker for papillary thyroid carcinoma (PTC) in comparison to cytokeratin 19 (CK19), Hector Battifora mesothelial epitope-1 (HBME-1), and galectin-3.

METHODS

We analyzed the expressions of CXCL12, CK19, HBME-1, and galectin-3 using immunohistochemical staining in 258 cases of thyroid lesions (196 PTCs and 62 thyroid lesions excluding PTC).

RESULTS

Remarkably, CXCL12 expression was exclusively found in PTC compared to other thyroid lesions (90.8% vs 3.2%; p < .001). In total, 91.1% (62 of 68) of the variant PTCs and 90.6% of conventional type (116 of 128) were associated with CXCL12 immunohistochemical expression, irrespective of the histological subtype. In contrast, very few of the thyroid lesions, excluding PTC, were positive for CXCL12 (2 of 62; 3.2%). Diagnostic performances for PTCs were as follows: sensitivity, 90.8%; specificity, 96.8%; positive predictive value, 98.9%; negative predictive value, 76.9%; and diagnostic accuracy, 92.2%.

CONCLUSION

Our findings indicate that CXCL12 might serve as an effective novel supplementary diagnostic marker for PTC.

Effects of surface chemical structure on the mechanical properties of Si(1-x)Ge(x) nanowires

The Young's modulus and fracture strength of Si(1-x)Ge(x) nanowires (NWs) as a function of Ge concentration were measured from tensile stress measurements. The Young's modulus of the NWs decreased linearly with increasing Ge content. No evidence was found for a linear relationship between the fracture strength of the NWs and Ge content, which is closely related to the quantity of interstitial Ge atoms contained in the wire. However, by removing some of the interstitial Ge atoms through rapid thermal annealing, a linear relationship could be produced. The discrepancy in the reported strength of Si and Ge NWs between calculated and experimented results could be related to SiO(2-x)/Si interfacial defects that are found in Si(1-x)Ge(x) NWs. It was also possible to significantly decrease the number of interfacial defects in the NWs by incorporating a surface passivated Al2O3 layer, which resulted in a substantial increase in fracture strength.

Immature Rubus coreanus Shows a Free Radical-Scavenging Effect and Inhibits Cholesterol Synthesis and Secretion in Liver Cells

Rubus coreanus fruits have been employed as a traditional medicine for centuries in the Asia-Pacific region. Its pharmacological action differs according to the different extraction methods utilized and the degree of fruit ripening. In this study, we determined the cellular effect of different ethanol extracts of mature and immature Rubus coreanus fruits in human hepatic cell line, HepG2 cells. The antioxidant activity, effect on superoxide dismutase activity and cholesterol biosynthesis efficiency was also evaluated. Immature Rubus coreanus extract showed higher antioxidant capability, compared with that of its mature fractions. Cellular antioxidant proteins including HO-1, Cu/Zn-superoxide dismutase and catalase were highly expressed in the presence of Rubus coreanus. Cholesterol levels in HepG2 cells treated with the water fraction of immature Rubus coreanus were significantly reduced. This antihyperlipidaemic action of Rubus coreanus is a consequence of cholesterol biosynthesis and extracellular secretion in HepG2 cells. These results indicate that among different ethanol fraction of mature and immature Rubus coreanus fruit extracts, water extract of immature fruit extract shows higher antioxidant as well as higher antihyperlipidaemic action.

Nestin expression as an indicator of cervical cancer initiation

Nestin is an intermediate filament protein expressed in proliferating cells during embryonic development of the central nervous system (CNS) and considered to be a neuronal stem cell/progenitor cell marker. This study investigated the difference of nestin expression between pre-cancer (carcinoma in situ - CIS) and cancer of cervix in 129 tissues (49 normal cervix, 41 CIS, and 39 invasive cervical cancer) through the use of a paraffin-embedded tissue array. Immunostaining was evaluated by intensity, proportion of stained cells, and pattern of expression. The expression of nestin was positive in 63.4% (26/41) for CIS and 43.6% (17/39) for invasive cervical cancer, but only 26.5% (13/49) for normal tissues (p = 0.002). Strong positive staining/large proportion staining were 53.7% (22/41) / 36.6% (15/41), 15.4% (6/39) / 61.5% (24/39) in the CIS and invasive cervical cancer tissues, respectively (p = 0.043, p < 0.001). The diffuse stain with basal layer was positive in 90.2% (37/41) for CIS, but only 24.5% (12/49) of the samples were positive in normal tissues (p < 0.001). Based on these results, the authors suggest that nestin expression seems to participate in the step of cancer initiation and could potentially be a useful marker in the early detection of cervical cancer.

Development and characterization of 22 polymorphic microsatellite markers for the balloon flower Platycodon grandiflorum (Campanulaceae)

The balloon flower (Platycodon grandiflorum A. DC.) is a perennial flowering plant of the Campanulaceae family; it is the only member of the genus Platycodon. Information on the genetic diversity of balloon flower populations is of great importance for the conservation and germplasm utilization of this flowering plant. Twenty-two polymorphic microsatellite loci were developed and characterized with eight balloon flower accessions collected from South Korea and China. Eighty-one alleles were detected among the eight balloon flower accessions. The number of alleles per locus ranged from two to six, with a mean of four alleles per locus. The observed and expected heterozygosity values ranged from 0.000 to 0.875 (mean = 0.355) and 0.117 to 0.766 (mean = 0.489), respectively. The polymorphic information content values ranged from 0.110 to 0.733, with a mean of 0.449. These new microsatellite markers will be useful for population and conservation genetic studies of P. grandiflorum.

Ambipolar charge transport in "traditional" organic hole transport layers

Organic semiconductors are often labeled as electron or hole transport materials due to the primary role they perform in devices. However, despite these labels we have shown using time-of-flight that two of the traditional "hole transport materials" TPD and NPB are actually excellent electron transporters the electron transport properties of which are comparable to those for holes.

Effects of dietary potential Acid production value on productivity in dairy cows

This study was conducted to estimate the potential acid production value (PAPV) of major diets and to determine the relationship between dietary PAPV and dairy production traits. Estimation of PAPV of major cattle feeds was based on an in vitro technique, which determined the degree of Ca dissociation from CaCO₃. Data on feeds and production traits were collected on 744 multiparous lactating Holstein dairy cows from five different farms. Grains had high PAPV with variable protein sources and by-products. High PAPV feedstuffs had a higher total gas production and lower pH compared to those with low PAPV. Dietary PAPV had a positive correlation with intake of dry matter, NDF, ADF, milk yield and milk solid production but a negative correlation with milk protein and milk fat concentration. Current results indicate that dietary PAPV can be utilized in predicting dairy production traits.

Acute appendicitis: relationships between CT-determined severities and serum white blood cell counts and C-reactive protein levels

OBJECTIVES

The aim of this study was to evaluate the relationships between the severity of appendicitis as depicted on CT and blood inflammatory markers of serum white blood cell (WBC) count and C-reactive protein (CRP).

METHODS

CT images in 128 patients (109 surgically proven and 19 with clinically excluded appendicitis) were retrospectively reviewed. Two radiologists by consensus evaluated and scored (using a 0, 1 or 2 point scale) severities based on CT-determined appendiceal diameters, appendiceal wall changes, caecal changes, periappendiceal inflammatory stranding and phlegmon or abscess formation. We investigated whether CT findings were significantly related to elevated WBC counts or CRP levels and performed the correlations of WBC counts and CRP levels with CT severity scores. Patients were also subjectively classified using four grades from normal (Grade I) to perforated appendicitis (Grade IV) on the basis of CT findings to evaluate differences in WBC counts and CRP levels between grades.

RESULTS

Only appendiceal wall changes and the phlegmon or abscess formation were related to elevated WBC counts and CRP levels, respectively (p<0.05). CT severity scores were found to be more strongly correlated with CRP levels (r = 0.669) than with WBC counts (r = 0.222). On the basis of CT grades, the WBC counts in Grade I were significantly lower than in other grades (p<0.001), whereas CRP levels in Grade IV were significantly higher than in other grades (p<0.001).

CONCLUSION

CRP levels were found to correlate with CT-determined acute appendicitis severity and could be a useful predictor for perforated appendicitis, whereas WBC counts might be useful to detect early acute appendicitis.

Strong cytoplasmic expression of COX2 at the invasive fronts of gallbladder cancer is associated with a poor prognosis

AIM

The significance of cell cycle proteins, p21 and p53, and cyclo-oxygenase-2 (COX2) is still controversial in gallbladder adenocarcinoma. Conflicting results exist with regard to the prognostic significance of p21 and p53 expression, and the strong association of gallbladder cancer with chronic inflammation makes it only natural that COX2 negativity is rarely encountered, even in non-neoplastic biliary epithelia.

METHODS

The authors explored whether the p21 and p53-labelling indices (LI) and strong cytoplasmic COX2 expression differ in the central parts (TC) and invasive fronts (IF) of gallbladder cancer. Paraffin-embedded whole tissue sections of 67 gallbladder cancers were immunohistochemically analysed for p21, p53 and COX2-LI at the IF and TC, and results were correlated with the clinicopathological features.

RESULTS

Significantly higher LI was seen in IF compared with TC for p21, p53 and COX2. COX2-LI-IF showed significant positive correlations with perineural and lymphatic invasion, higher T and N stages, and non-papillary gross morphology. Gall-bladder cancers with COX2-LI-IF≥30% showed decreased overall and disease-free survival, and COX2-LI-IF≥30% was an independent poor prognostic factor on multivariable analysis. Gall-bladder cancers with high COX2 and p21-LI-IF showed decreased overall and disease-free survival.

CONCLUSIONS

The IF of gallbladder cancer is characterised by significantly increased expression of p21, p53 and strong COX2 expression, and strong cytoplasmic COX2 expression at IF is associated with a poorer prognosis. Heterogeneity between TC and IF should be considered in in situ molecular studies, especially during interpretation of immunohistochemical stain results and tissue microarray construction.

Identification of Kunitz trypsin inhibitor mutations using SNAP markers in soybean mutant lines

The Kunitz trypsin inhibitor (KTi) in soybean has several polymorphic types that are controlled by multiple alleles, which behave in a co-dominant fashion. Of these, Tia and Tib, which differ by nine amino acids, are the predominant types. In order to develop a single nucleotide amplified polymorphism (SNAP) marker for the classification of the predominant KTi types, Tia and Tib, and evaluate KTi activities by differing KTi type total 451 soybean mutant lines (M(12)-M(16) generation) were incorporated in this study. Among 451 soybean mutants, 144 and 13 mutant lines showed decreased and increased trypsin inhibitor activity when compared with the original cultivars, respectively. To identify the KTi type, we designed a SNAP marker. Among 451 mutant lines from 12 soybean cultivars and landraces, 8 mutant lines derived from cvs. Baekwoon, Paldal and Suwon115 showed a change in KTi type when compared with the original cultivars using the SNAP marker. Five mutant lines in Suwon115 changed from Tib to Tia, while two mutant lines derived from cv. Baekwoon and one mutant line derived from cv. Paldal were changed from Tia to Tib. These changes of KTi types were confirmed by sequencing of the KTi genes and non-denaturing polyacrylamide gel electrophoresis of the KTi proteins. To identify the effect of KTi activity based on the change in KTi type, we measured the KTi activity using the three cultivars and eight mutant lines that showed changes in KTi type. Two mutant lines (BW-1 and 7-2) derived from cv. Baekwoon and one mutant line (PD-5-10) from cv. Paldal that changed from Tia to Tib showed lower activity than the original cultivar. In cv. Suwon115, five mutant lines that changed from Tib to Tia showed higher activity than the original cultivar. These results indicate that the designed SNAP marker was capable of identifying the KTi type and that Tia activity was higher than Tib activity in soybean.

Enhancing effect of albumin hydrolysate on ethanol production employing Saccharomyces sake

The enhancing effect of albumin hydrolysate on ethanol production was investigated in ethanol fermentations using Saccharomyces sake. In batchwise ethanol production, addition of supplemental albumin hydrolysate and phosphatidylcholine, or albumin hydrolysate alone, brought about a more than 60% increase in final ethanol concentration (148 or 144 g/L compared with 88 g/L with no supplementation [control] after 72 h). The effect of the supplements is believed to be due to an enhanced alcohol tolerance of cells grown in media containing the supplements. Cells grown in media containing albumin hydrolysate were enriched in phenyalanine, tyrosine, and methionine in their plasma membranes. All three amino acids were also present in considerable amounts in the albumin hydrolysate. This fact suggests that the three amino acids, which are present in albumin hydrolysate, are incorporated into the plasma membranes of cells. Under ethanol production conditions in which only one amino acid among the components of albumin hydrolysate was excluded, namely phenlalanine, tyrosine, or methionine, significant reductions in ethanol production resulted.

Aberrant promoter CpG island hypermethylation of the adenomatosis polyposis coli gene can serve as a good prognostic factor by affecting lymph node metastasis in squamous cell carcinoma of the esophagus

There has been no clear evidence demonstrating whether DNA hypermethylation can affect the prognosis of esophageal cancer. We collected tissue from 50 cases of squamous cell carcinoma of the esophagus and tested them for DNA hypermethylation using methylation-specific polymerase chain reaction. CpG island hypermethylations were observed in 10% for p16, 34% for RARbetaP2, 46% for adenomatosis polyposis coli (APC), 14% for RASSF1A, 84% for FHIT, and 8% for hMLH1. APC promoter hypermethylation was frequently found in patients without lymph node metastasis compared with those with lymph node metastasis (62.5% : 30.8%, P = 0.025). The number of metastatic lymph nodes were lower in patients with APC promoter hypermethylation (0.87 +/- 0.30 : 3.07 +/- 0.72, P = 0.008). Excluding operative mortalities and incomplete resections, 42 patients were analyzed for long-term outcome. During the mean follow-up period of 35 months, 17 developed recurrence and 14 died of cancer. Ten patients died of other causes. In univariable analysis, unmethylation of APC (P = 0.0015) and FHIT (P = 0.0044), as well as presence of lymph node metastasis (P = 0.0038), were risk factors for recurrence. In multivariable analysis, lymph nodes metastasis (P = 0.050) and unmethylation of APC promoter (P = 0.023) remained as significant risk factors. In conclusion, promoter hypermethylation of the APC gene is related to a lower number of metastatic lymph nodes and to superior prognosis in terms of recurrence, which suggests it might be involved in the process of lymph node metastasis in esophageal cancer.

First Report of Anthracnose Fruit Rot Caused by Colletotrichum acutatum on Strawberry in Korea

Symptoms typical of anthracnose fruit rot; sunken, dark brown lesions on maturing fruits, were found in a commercial field of strawberry (Fragaria × ananassa) cv. Cal Giant in Yangyang County, Korea in May 2007. Masses of conidia were produced in acervuli in the center of lesions. The fungus was isolated on potato dextrose agar (PDA). Colonies grown on PDA were pale to mouse gray and became dark green to black in reverse. Conidia were formed in orange-to-salmon pink masses in the center of the culture. The average size of conidia on PDA was 15.2 × 4.6 μm, and they were hyaline, straight, cylindrical, with pointed ends, and aseptate (1). The fungus did not form an ascigerous stage in culture. Mycelial growth rate was 7.5 mm per day at 25°C on PDA. The identity of two isolates was confirmed as Colletotrichum acutatum J.H. Simmonds by PCR amplification using species-specific primers TBCA and TB5 (2), resulting in a characteristic 330-bp band on agarose gel. Morphological characters were in accordance with previous reports on C. acutatum. A pathogenicity test was conducted with five healthy plants of cvs. Cal Giant, Maehyang, Seolhyang, Kumhyang, Akihime, and Redpearl. After fruits and flowers were sprayed with a conidia suspension (10⁵ conidia per ml), the plants were maintained at 10 to 25°C and 100% relative humidity in a greenhouse. As a control, five healthy plants were sprayed with sterile distilled water and incubated under the same conditions. Dark brown, water-soaked spots appeared on mature fruits of all cultivars after 5 days, and lesions on green fruits appeared on individual achenes. Flowers developed dark lesions, dried out, and died. No symptoms were found on the control plants. After the pathogen was reisolated from fruits and flowers lesions, the morphological characters developed in culture as described above. To our knowledge, this is the first report of C. acutatum causing strawberry anthracnose in Korea. References: (1) B. J. Smith and L. L. Black. Plant Dis. 74:69, 1990. (2) P. Talhinhas et al. Appl. Environ. Microbiol. 71:2987, 2005.

Medical physics aspects of cancer care in the Asia Pacific region

Medical physics plays an essential role in modern medicine. This is particularly evident in cancer care where medical physicists are involved in radiotherapy treatment planning and quality assurance as well as in imaging and radiation protection. Due to the large variety of tasks and interests, medical physics is often subdivided into specialties such as radiology, nuclear medicine and radiation oncology medical physics. However, even within their specialty, the role of radiation oncology medical physicists (ROMPs) is diverse and varies between different societies. Therefore, a questionnaire was sent to leading medical physicists in most countries/areas in the Asia/Pacific region to determine the education, role and status of medical physicists.Answers were received from 17 countries/areas representing nearly 2800 radiation oncology medical physicists. There was general agreement that medical physicists should have both academic (typically at MSc level) and clinical (typically at least 2 years) training. ROMPs spent most of their time working in radiotherapy treatment planning (average 17 hours per week); however radiation protection and engineering tasks were also common. Typically, only physicists in large centres are involved in research and teaching. Most respondents thought that the workload of physicists was high, with more than 500 patients per year per physicist, less than one ROMP per two oncologists being the norm, and on average, one megavoltage treatment unit per medical physicist.There was also a clear indication of increased complexity of technology in the region with many countries/areas reporting to have installed helical tomotherapy, IMRT (Intensity Modulated Radiation Therapy), IGRT (Image Guided Radiation Therapy), Gamma-knife and Cyber-knife units. This and the continued workload from brachytherapy will require growing expertise and numbers in the medical physics workforce. Addressing these needs will be an important challenge for the future.

Origin of lumbar spinal roots and their relationship to intervertebral discs: a cadaver and radiological study

Previous studies on the anatomy of the lumbar spine have not clarified the precise relationship of the origin of the lumbar roots to their corresponding discs or their angulation to the dural sac. We studied 33 cadavers (25 formalin-preserved and eight fresh-frozen) and their radiographs to determine these details. All cadavers showed a gradual decrease in the angle of the nerve root from L1 to S1. The origin of the root was found to be below the corresponding disc for the L1 to L4 roots. In the formalin-preserved cadavers 8% of the L5 roots originated above, 64% below and 28% at the L4/L5 disc. In the fresh cadavers the values were 12.5%, 62.5% and 25%, respectively. For the S1 root 76% originated above and 24% at the L5-S1 disc in the formalin-preserved cadavers and 75% and 25%, respectively, in the fresh cadavers.A herniated disc usually compresses the root before division of the root sleeve. Thus, compression of the thecal sac before the origin of the root sleeve is common for L1 to L5 whereas compression at the root sleeve is common for S1. Our findings are of value in understanding the pathophysiology of prolapse of the disc and in preventing complications during surgery.

Impact of IL-1 receptor antagonist gene polymorphism on schizophrenia and bipolar disorder

OBJECTIVES

Variable levels of cytokines were observed in patients with schizophrenia and bipolar disorder, and an especially high level of interleukin-1 (IL-1) was detected in schizophrenia patients. It is known that IL-1 receptor antagonist (IL-1RA) binds to IL-1 receptors and inhibits the receptor binding of IL-1alpha and IL-1beta.

METHODS

In this study, the association between the variable number of tandem repeats polymorphism of the IL-1RA gene and schizophrenia (n=269) and bipolar disorder (n=83) was investigated.

RESULTS

The genotype distribution and allele frequency were significantly different between schizophrenic patients and the control group (P<0.05); however, there were no prominent differences between bipolar patients and the control group. The carriage rate for the IL1RN*2 allele was associated with higher risk of schizophrenia (odds ratio=2.24).

CONCLUSIONS

This study indicates that IL-1RA could be a candidate gene for susceptibility to schizophrenia.

Differences in p53 gene polymorphisms between Korean schizophrenia and lung cancer patients

The reduced incidence of cancer observed in schizophrenia patients may be related to differences in genetic background. It has been suggested that genetic predisposition towards schizophrenia is associated with reduced vulnerability to lung cancer, and p53 gene is one of the candidate genes. We tested the genetic association between schizophrenia and lung cancer by analyzing polymorphic sites in the p53 gene. Genotype and allele frequencies at two polymorphic sites in the p53 gene (BstUI and MspI restriction sites in exon 4 and intron 6, respectively) were studied in Korean schizophrenia (n=179) and lung cancer patients (n=104). Comparisons of the genotype and allele frequencies of the MspI polymorphism revealed significant differences between schizophrenia and lung cancer patients. The results suggest that the p53 polymorphism specifically found in schizophrenia patients may be associated with reduced vulnerability to lung cancer.