Objective: To analyze the causes and distribution characteristics of leukopenia in apheresis platelet donors, and to formulate effective pre-donation intervention measures. Methods: The data of apheresis platelet donors with leukopenia in Dongguan Central Blood Station during the entire year of 2021 were collected. Combined with the results of peripheral blood smear examination, the related factors that may cause leukopenia were analyzed. Results: There were 57 apheresis platelet donors with leukopenia in peripheral blood, with an incidence of 1.53% (57/3 726). The rate of leukopenia showed no significant difference between male and female apheresis platelet donors (χ =0.627, P>0.05), and was not related to the frequency of platelet donation (χ =1.48, P>0.05). However, there were statistically significant differences in the rate of leukopenia across seasons (χ =10.13, P<0.05), highly significant differences among different age groups (χ =22.98, P<0.001), and a significant association with the number of apheresis platelet donations (χ =7.80, P<0.05). Multivariate logistic regression analysis showed that age (36-55 years old), number of donations (≥26 times), and season (first and fourth quarters) were independent risk factors for leukopenia in apheresis platelet donors, while gender had no significant independent effect on leukopenia. Peripheral blood smear examination was performed on all apheresis platelet donors with leukopenia, and primary malignant hematological diseases infiltrated into peripheral blood were excluded. Among them, two cases of peripheral blood smear showed left shift of granulocyte nucleus with increased and thickened granules, whereas the other 55 cases only showed decreased peripheral blood nucleated cell counts without obvious morphological abnormalities. Conclusion: Leukopenia in apheresis platelet donors mainly occurred in young and middle-aged people and those with ≥26 donations, with high incidence in winter and spring, and more common in males. Blood routine examination combined with blood smear examination can facilitate the detection of conditions that are not suitable for blood donation, including hematological malignant diseases and infection-related leukopenia. Strengthening health consultation before blood donation is an important measure to identify blood donors with leukopenia.

BACKGROUND: Alpha-glucosidase inhibitors or dipeptidyl peptidase-4 inhibitors are both hypoglycemia agents that specifically impact on postprandial hyperglycemia. We compared the effects of acarbose and sitagliptin add on to metformin on time in range (TIR) and glycemic variability (GV) in Chinese patients with type 2 diabetes mellitus through continuous glucose monitoring (CGM). METHODS: This study was a randomized, open-label, active-con-trolled, parallel-group trial conducted at 15 centers in China from January 2020 to August 2022. We recruited patients with type 2 diabetes aged 18-65 years with body mass index (BMI) within 19-40 kg/m 2 and hemoglobin A1c (HbA1c) between 6.5% and 9.0%. Eligible patients were randomized to receive either metformin combined with acarbose 100 mg three times daily or metformin combined with sitagliptin 100 mg once daily for 28 days. After the first 14-day treatment period, patients wore CGM and entered another 14-day treatment period. The primary outcome was the level of TIR after treatment between groups. We also performed time series decomposition, dimensionality reduction, and clustering using the CGM data. RESULTS: A total of 701 participants received either acarbose or sitagliptin treatment in combination with metformin. There was no statistically significant difference in TIR between the two groups. Time below range (TBR) and coefficient of variation (CV) levels in acarbose users were significantly lower than those in sitagliptin users. Median (25th percentile, 75th percentile) of TBR below target level <3.9 mmol/L (TBR 3.9 ): Acarbose: 0.45% (0, 2.13%) vs . Sitagliptin: 0.78% (0, 3.12%), P = 0.042; Median (25th percentile, 75th percentile) of TBR below target level <3.0 mmol/L (TBR 3.0 ): Acarbose: 0 (0, 0.22%) vs . Sitagliptin: 0 (0, 0.63%), P = 0.033; CV: Acarbose: 22.44 ± 5.08% vs . Sitagliptin: 23.96 ± 5.19%, P <0.001. By using time series analysis and clustering, we distinguished three groups of patients with representative metabolism characteristics, especially in GV (group with small wave, moderate wave and big wave). No significant difference was found in the complexity of glucose time series index (CGI) between acarbose users and sitagliptin users. By using time series analysis and clustering, we distinguished three groups of patients with representative metabolism characteristics, especially in GV. CONCLUSIONS: Acarbose had slight advantages over sitagliptin in improving GV and reducing the risk of hypoglycemia. Time series analysis of CGM data may predict GV and the risk of hypoglycemia. TRIAL REGISTRATION Chinese Clinical Trial Registry: ChiCTR2000039424.
Humans ; Metformin/therapeutic use* ; Sitagliptin Phosphate/therapeutic use* ; Acarbose/therapeutic use* ; Diabetes Mellitus, Type 2/blood* ; Middle Aged ; Male ; Female ; Adult ; Blood Glucose/drug effects* ; Hypoglycemic Agents/therapeutic use* ; Aged ; Glycated Hemoglobin/metabolism* ; Adolescent ; Young Adult ; China ; East Asian People

Objective To retrospectively analyze the pregnancy outcome of pregnant women exposed to botulinum toxin A(BTX-A)during pregnancy,so as to provide experience for clinicians to guide safe drug use in pregnant women.Methods To investigate the pregnancy outcome of pregnant women exposed to BTX-A during pregnancy or the last three months before pregnancy who visited the medication consultation clinic of Hangzhou Women's Hospital from January 2017 to March 2023.Results A total of 17 pregnant women exposed to BTX-A during pregnancy or the last three months before pregnancy were included in this study.Specifically,8 cases had known pregnancy outcomes,among which 1 case had birth defect with the ratio accounting for 12.5%,while the remaining 9 cases required early induced abortion.Conclusion Exposure to BTX-A during pregnancy is probably safe,but further studies are needed.

Objective:To compare the diagnostic performance of multiparametric magnetic resonance imaging (mpMRI) and prostate-specific membrane antigen (PSMA) PET/CT in detecting pelvic lymph node metastasis in prostate cancer.Methods:This is a retrospective case series study. A retrospective analysis was conducted on the data of 115 prostate cancer patients who underwent both mpMRI and PSMA PET/CT before undergoing radical prostatectomy and extended pelvic lymph node dissection at the Department of Urology, Xiangya Hospital, Central South University, between March 2020 and September 2023. The age ( M(IQR)) was 67(10) years (range: 45 to 84 years), and the body mass index was 24(4) kg/m 2 (range: 18 to 30 kg/m 2). Pathological and imaging data were obtained from the patients. Lymph node pathology results were used as the gold standard to evaluate the diagnostic performance of mpMRI and PSMA PET/CT for detecting pelvic lymph node metastasis in PCa through diagnostic evaluation tests. Comparisons between groups were performed using independent samples t-test, Mann-Whitney U test, or χ2 test. Results:The positive rate for detecting pelvic lymph node metastasis was 18.3% (21/115) with mpMRI and 25.2% (29/115) with PSMA PET/CT. The pathological positive rate for lymph nodes was 28.7% (33/115). In patient-based analysis, the diagnostic sensitivity of PSMA PET/CT was significantly higher than that of mpMRI (63.6% vs. 30.3%, χ2=7.36, P=0.007). In lesion-based analysis, both the sensitivity and positive predictive value of PSMA PET/CT were significantly higher than those of mpMRI (sensitivity: 68.0% vs. 21.6%, χ2=42.20, P<0.01; positive predictive value: 50.0% vs. 23.1%, χ2=7.54, P=0.006). Conclusions:PSMA PET/CT and mpMRI both demonstrates good specificity in predicting pelvic lymph node metastasis in prostate cancer. However, PSMA PET/CT is significantly superior to mpMRI in terms of sensitivity and the detection rate of pathologically positive lymph nodes.

Objective:To compare the diagnostic performance of multiparametric magnetic resonance imaging (mpMRI) and prostate-specific membrane antigen (PSMA) PET/CT in detecting pelvic lymph node metastasis in prostate cancer.Methods:This is a retrospective case series study. A retrospective analysis was conducted on the data of 115 prostate cancer patients who underwent both mpMRI and PSMA PET/CT before undergoing radical prostatectomy and extended pelvic lymph node dissection at the Department of Urology, Xiangya Hospital, Central South University, between March 2020 and September 2023. The age ( M(IQR)) was 67(10) years (range: 45 to 84 years), and the body mass index was 24(4) kg/m 2 (range: 18 to 30 kg/m 2). Pathological and imaging data were obtained from the patients. Lymph node pathology results were used as the gold standard to evaluate the diagnostic performance of mpMRI and PSMA PET/CT for detecting pelvic lymph node metastasis in PCa through diagnostic evaluation tests. Comparisons between groups were performed using independent samples t-test, Mann-Whitney U test, or χ2 test. Results:The positive rate for detecting pelvic lymph node metastasis was 18.3% (21/115) with mpMRI and 25.2% (29/115) with PSMA PET/CT. The pathological positive rate for lymph nodes was 28.7% (33/115). In patient-based analysis, the diagnostic sensitivity of PSMA PET/CT was significantly higher than that of mpMRI (63.6% vs. 30.3%, χ2=7.36, P=0.007). In lesion-based analysis, both the sensitivity and positive predictive value of PSMA PET/CT were significantly higher than those of mpMRI (sensitivity: 68.0% vs. 21.6%, χ2=42.20, P<0.01; positive predictive value: 50.0% vs. 23.1%, χ2=7.54, P=0.006). Conclusions:PSMA PET/CT and mpMRI both demonstrates good specificity in predicting pelvic lymph node metastasis in prostate cancer. However, PSMA PET/CT is significantly superior to mpMRI in terms of sensitivity and the detection rate of pathologically positive lymph nodes.

Extracellular vesicles (EV) are highly heterogeneous nanoscale vesicles secreted by cells. They carry various bioactive molecules derived from the parent cells. EV are widely distributed in various body fluids, showing enormous potential in liquid biopsy and disease treatment. However, conventional flow cytometers face challenges in detecting single EV with a diameter smaller than 300 nm. The nano-flow cytometry (nFCM) developed based on Raleigh scattering and sheath-flow single-molecule fluorescence detection has successfully pushed the detection limit of EV to 40 nm. Through multi-parameter detection at the single-particle level, nFCM enables simultaneous analysis of particle size, particle concentration, and multiple biochemical properties of individual EV. nFCM can be applied to clinical diagnosis and therapeutics based on EV.

Objective:To investigate the clinical features, treatment, and prognosis of transient hyperammonemia of the newborn (THAN).Methods:Data of two infants with severe THAN admitted to the Department of Neonatology of Shanghai Children's Hospital in September 2021 and August 2022 were retrospectively investigated. Clinical data of confirmed THAN cases (blood ammonia>400 μmol/L) were collected from relevant literature retrieved from the Wanfang Database, China National Knowledge Infrastructure, Chinese Medical Journal Database, and PubMed up to July 2022. A descriptive method was used for statistical analysis.Results:A total of 24 cases were involved (two in the present study, and 22 in 12 retrieved articles), including 19 (79.2%) premature newborns and five term infants. The average birth weight was (2 237±608) g and the average onset time was 27 h (4-55 h) after birth. The early clinical symptoms included respiratory distress and hyporesponsiveness (drowsiness, lethargy, coma or hypotonia) in 18 cases (75.0%), metabolic acidosis in 11 cases (45.8%), hypocalcemia in seven cases (29.2%), pupil fixation/dilation in six cases (25.0%), convulsion in five cases (20.8%), apnea in three cases (12.5%) and sinus bradycardia in one case (4.2%). The serum ammonia levels were 1 422.8 μmol/L (547.2-4 494.1 μmol/L). Treatments included peritoneal dialysis plus exchange transfusion in eight cases (33.3%), exchange transfusion in seven cases (29.2%), continuous renal replacement therapy (CRRT) in four cases (16.7%), arginine in two cases (8.3%), peritoneal dialysis in two cases (8.3%), and CRRT+peritoneal dialysis in one case (4.2%). During follow-ups of four months (one month to six years), 13 cases (54.2%) showed no abnormalities in development; two (8.3%) had a neurodevelopmental delay, and six (25.0%) died. The follow-up of the other three cases (12.5%) were not reported in the literature.Conclusions:The early clinical manifestation of severe THAN is atypical. A good prognosis can be expected through early exclusion of possible hyperammonemia-related genetic metabolic diseases and lowering the serum ammonia level. Long-term follow-up is needed for neurological evaluation.

【Objective】 To observe the effect of platelet transfusion in inpatients with haematological diseases, analyze the possible causes of platelet transfusion refractoriness (PTR), in order to further improve the efficacy of platelet transfusion. 【Methods】 A total of 310 patients with blood disease in our hospital from August 2020 to November 2021 who received platelet transfusion were retrospectively analyzed. Possible influencing factors of platelet transfusion, including gender, age, platelet preservation time, number of platelet transfusions, complication and red blood cell product transfusion were analyzed. 【Results】 Patients were divided into effective group and refractory group according to percentage platelet recovery (PPR) and corrected count increment (CCI). PTR was defined as PPR <20% or CCI <5 000 after two consecutive transfusions in 24 h or clinical bleeding symptoms or tendency not significantly controlled. Statistical differences were noticed between the two groups in terms of gender, pretransfusion white blood cell count, anemia, and whether antibiotics were used (P<0.05). The type of disease, gender, anemia and number of comorbidities were associated with PTR. The incidence of PTR was the highest in patients with myelodysplastic syndrome, and the incidence of PTR was higher in men than in women. Transfusion units of suspended red blood cells and the number of comorbidities were negatively correlated with the transfusion efficacy (P<0.05). 【Conclusion】 Possible influencing factors of platelet transfusion included the level of white blood cells before transfusion, use of antibiotics, anemia and transfusion of red blood cells, number of comorbidities, and type of disease, while no significant differences were found in age, hemolysis, hypersplenism, platelet preservation time, and number of platelet transfusions on transfusion efficacy.

Objective:To investigate the risk factors and missed diagnosis of intraductal carcinoma of prostate (IDC-P) in patients with metastatic prostate cancer.Methods:The preoperative PSA, prostate MRI, bone scans and lung CT of all patients who underwent prostate biopsy in Department of Urology, Xiangya Hospital, Central South University from January 2018 to July 2020 were reviewed. A total of 261 patients with high suspicion of metastatic prostate cancer were screened for inclusion. Two full-time senior pathologists of urogenital tumors in Xiangya Hospital independently reviewed their pathological sections and detected IDC-P according to the 2016 WHO tumor classification. Diagnostic criteria are defined as malignant epithelial cells filling large acini and prostatic ducts, with preservation of basal cells and solid or dense cribriform pattern/loose cribriform or micropapillary pattern with either marked nuclear atypia or non-focal comedonecrosis.Results:The detection rate of IDC-P was 29.12%(76/261), while the actual reporting rate was only 9.96%(26/261). The results of subgroup analysis including age, PSA level, Gleason score as well as different metastatic sites showed that detection rate of IDC-P was 33.69% in the PSA≥50 ng/ml subgroup, much higher than 17.57% in the PSA <50 ng/ml subgroup ( P=0.0039); And it was 32.33% in the Gleason score ≥ 8 subgroup, much higher than 3.45% in the Gleason score < 8 subgroup ( P<0.01). It was not significantly different in different age subgroups as well as different metastatic site subgroups. These data suggest that PSA ≥ 50 ng/ml as well as Gleason score ≥ 8 may be risk factors of IDC-P.157 samples were stained by immunohistochemistry. The detection rates of IDC-P were 84.21% (16/19) in P63 (+ ) samples, 36.00% (9/25) in ERG (+ ) samples. There were 3 samples with both P63 (+ ) and ERG (+ ), all of which had IDC-P. Conclusions:There is misdiagnosis of IDC-P on prostate needle biopsy in patients with metastatic prostate cancer currently. PSA ≥ 50 ng/ml and Gleason score ≥ 8 are risk factors of IDC-P. Thus, attention should be paid to the possibility of IDC-P in such patients. When the diagnosis is difficult, immunohistochemical staining for ERG and P63 is helpful in IDC-P determination.

Objective: This study examined school-based sexual harassment experience among college students in Guangzhou, and to provide theoretical basis for preventing campus sexual harassment. Methods: A cross-sectional survey was conducted among 1 062 college students from five universities in Guangzhou, China. A self-made questionnaire regarding awareness sexual harassment and experience of school-based sexual harassment was filled out by students voluntarily and anonymously. Results: A total of 169 students reported they experienced school-based sexual harassment. The incidence of school-based sexual harassment among college students in Guangzhou was 15.91%, higher among female students (20.30%) than male students(10.2%)(χ 2=19.91, P<0.01). Verbal harassment (10.26%) was the most common type of sexual harassment, followed by physical harassment (7.16%), visual harassment (4.61%) and unwanted sexual advances (1.69%). Sexual harassment primarily took place in teaching building(58), dormitory(33) and office(17). Among the victims, 116(68.64%) were influenced by harassment. Females(n=94) being harassed were more likely to be negatively influenced compare to males(n=22). Conclusion School-based sexual harassment may result adverse psychological outcomes to students, more emphasis should be put on the prevention of sexual harassment.