Room temperature stored platelets are associated with a higher risk of sepsis and related fatality. The risk of bacterial contamination of platelets is a leading risk of infection from blood transfusion. U.S. Food and Drug Administration recently issued a guidance on bacterial risk control strategies for blood collection establishments and transfusion services to enhance the safety and availability of platelets for transfusion. The prevention and control strategies in the guidance would be informative and instructive for further development of risk control strategies of platelet bacterial contamination in China.

Objective To observe the ultrasonic manifestations and outcomes of fetal congenital kidney anomalies(CKA)during the second trimester of pregnancy.Methods Data of 223 singleton fetuses with CKA detected with ultrasound during the second trimester of pregnancy were retrospectively analyzed.The ultrasonic manifestations of fetal CKA during the second trimester of pregnancy were observed,and the changes till the third trimester of pregnancy were analyzed.Results Among 223 CKA fetuses,simple renal pelvis separation was detected in 142 fetuses,while simple double renal pelvis malformation in was found in 41,polycystic kidney disease in 11,absent kidneys in 7,simple renal cysts and ectopic kidneys each in 6,smaller kidneys in 4,horseshoe kidneys and unilateral renal pelvis separation complicated with contralateral double renal pelvis malformation each in 2,unilateral renal cyst swelling complicated with contralateral double renal pelvis malformation and unilateral renal double renal pelvis malformation complicated with renal pelvis separation was noticed each in 1 fetus.Abnormalities such as renal pelvis separation,renal pelvis malformation,renal cysts and smaller kidney changed during the third trimester of pregnancy,while polycystic kidney disease,absent kidney,ectopic kidney and horseshoe kidney not significantly changed.Conclusion Fetal CKA had various types being able to change dynamically with the development of pregnancy,among which renal pelvis separation was the most common type.

Objective To observe the ultrasonic manifestations and genetic abnormalities in the second trimester of pregnancy of fetal congenital kidney anomalies(CKA).Methods Totally 14 singleton pregnancy women with CKA fetus detected with prenatal ultrasound and proved by genetic examination who underwent prenatal ultrasound in the second trimester of pregnancy were enrolled.The ultrasonic manifestations and genetic abnormalities in the second trimester of pregnancy were observed.Results Among 14 fetuses,simple renal abnormalities were detected in 10,while renal abnormalities complicated with extrarenal abnormalities were noticed in 4 fetuses with prenatal ultrasound in the second trimester of pregnancy,presented as enhanced renal echoes,renal pelvis separation and ectopic kidney,etc.Genetic examination showed chromosomal karyotype abnormalities in 4 fetuses,chromosomal copy number abnormalities in 8 fetuses,and genetic mutations in 2 fetuses.Conclusion The ultrasonic manifestations in the second trimester of pregnancy of fetal CKA included enhanced renal echo,renal pelvis separation and ectopic kidney,etc.Severe chromosomal or genetic abnormalities could exist even when the relative manifestations were not obvious.

Humans ; Endovascular Aneurysm Repair ; Endovascular Procedures ; Blood Vessel Prosthesis Implantation ; Aortic Aneurysm, Abdominal/surgery* ; Treatment Outcome ; Postoperative Complications ; Risk Factors ; Aortic Rupture/surgery* ; Retrospective Studies

Although chromosomal mosaic embryos detected by trophectoderm(TE)biopsy offer healthy embryos available for transfer,high-resolution postnatal karyotyping and chromosome testing of the transferred embryos are insufficient.Here,we applied single-cell multi-omics sequenc-ing for seven infants with blastula chromosomal mosaicism detected by TE biopsy.The chromo-some ploidy was examined by single-cell genome analysis,with the cellular identity being identified by single-cell transcriptome analysis.A total of 1616 peripheral leukocytes from seven infants with embryonic chromosomal mosaicism and three control ones with euploid TE biopsy were analyzed.A small number of blood cells showed copy number alterations(CNAs)on seem-ingly random locations at a frequency of 0％-2.5％per infant.However,none of the cells showed CNAs that were the same as those of the corresponding TE biopsies.The blastula chromosomal mosaicism may be fully self-corrected,probably through the selective loss of the aneuploid cells dur-ing development,and the transferred embryos can be born as euploid infants without mosaic CNAs corresponding to the TE biopsies.The results provide a new reference for the evaluations of trans-ferring chromosomal mosaic embryos in certain situations.

Objective:To carry out prenatal screening and diagnosis for a woman with advanced maternal age.Methods:Non-invasive prenatal testing (NIPT) was carried out to determine the risk of fetal chromosome aneuploidy. Aminiocentesis was proceeded for fetal chromosomal karyotyping and copy number variation sequencing (CNV-seq). The fetus was subjected to systematic ultrasound screening in the second trimester.Results:NIPT has indicated there was a loss of fetal sex chromosome. Karotyping of the amniocyte showed a mosaic sex chromosome abnormality 45, X[53]/46, X, + mar[7]. The result of fetal DNA CNV-seq was seq[GRCh37]del(Yq11.1q12) chrY: g. 13 104 553-28 819 361del, seq[GRCh37]del(Yp11.32p11.2) chrY: g. 10 001-9 873 915del (mosaic ratio: 30%). Ultrasonography discovered that the fetus had renal dysplasia and male external genitalia. The karyotypes of the couple were both normal.Conclusion:Multiple genetic tests should be carried out for fetus with a high risk for chromosome aneuploidies signaled by NIPT. It is difficult to predict the post-natal phenotype for fetuses with mosaic sex chromosomal aneuploidies. The couple should be carefully counseled upon genetic counseling.

The 2020 Nobel Prize in Chemistry recognized CRISPR-Cas9, a super-selective and precise gene editing tool. CRISPR-Cas9 has an obvious advantage in editing multiple genes in the same cell, and presents great potential in disease treatment and animal model construction. In recent years, CRISPR-Cas9 has been used to establish a series of rat models of drug metabolism and pharmacokinetics (DMPK), such as

Objective To explore the relationship between the RunX2 expression and the clinicopathological features in bone giant cell tumor(GCT).Methods Fifty-eight specimens of GCT were selected and grouped according to the malignant degree,tumor pathological grade,whether having soft tissue invasion and complicating pathological fracture.Then the immunohistochemical staining technique was used to analyze and compare the difference of RunX2 expression levels among different groups.Results The RunX2 expression level in malignant GCT tissues was significantly higher than that in benign GCT tissue(P＜0.05).RunX2 expression level was increased with the GCT tissue histological grade increase(P＜0.05).The expression level RunX2 in GCT tissue with soft tissue invasion was significantly higher than that in the GCT tissue without invasion(P＜0.05);the RunX2 expression level in GCT tissue with complicating pathologic fractures was significantly higher than that in the GCT tissue without complicating pathologic fractures(P＜0.05).Conclusion The RunX2 expression level is related to the severity of GCT.

Epigenetic modification refers to a variety of regulating processes that may induce the changes in gene expression without altering DNA sequence. Epigenetic mechanisms including DNA methylation, histone modification, and regulatory non-coding RNAs are involved in hepatic stellate cell activation and liver fibrogenesis. A deep understanding of epigenetic mechanisms in liver fibrosis helps to identify new markers and therapies for liver fibrosis.

Objective: To evaluate the self-developed intelligent assist order system for parenteral nutrition on the control of concentration exceeding standard of positive ions.Methods: The special comments, pharmacist audit and information control were used to intervene the concentration exceeding standard of positive ions in parenteral nutrition orders and the effect of the three intervention methods were evaluated.Results: For the intervention of concentration exceeding standard of positive ions in parenteral nutrition orders, the information control was better than the special comments and pharmacists audit.Conclusion: The intelligent assist order system for parenteral nutrition can solve the problem of concentration exceeding standard and promote the rational application of parenteral nutrition in hospitals.