Objective To investigate the distribution of A subgroups in the A and AB blood type populations among voluntary blood donors in Zhongshan,study the antigen-antibody characteristics of A subgroups,establish a local A subgroup database,and support the development of precision medicine.Methods ABO subgroup screening was performed using the microplate method.Specimens negative for monoclonal anti-A1 reactivity underwent sequencing of exons 1～7 of the ABO gene to confirm genotypes.Cryopreservation and thawing of glycerolized subgroup red blood cells(RBCs),as well as preservation efficacy of concentrated human-derived antibodies with preservatives,were studied.Results Among 1 212 blood donor specimens,28 subgroup specimens were identified,with a prevalence of 1.54%(15/971)in blood type A and 5.39%(13/241)in blood type AB.Sequencing of 10 specimens revealed 7 ABO genotypes:ABO*A2.01/O.01.02(2 cases),ABO*A1.02/B.01(3 cases),ABO*BA.02/O.01.02,ABO*AW.31.02-05/A2.05,ABO*A2.05/B.01,ABO*A2new/O.01.01,and ABO*A1.02/O.01.01(1 case each).Additionally,one rare allele mutation(c.700C>G)and one novel allele mutation(c.203G>T)(GenBank accession number:PQ152337)were identified.Human anti-A1 antibodies with a titer of 8 were successfully concentrated.Optimal preservation conditions included 0.1%preservative concentration and cryopreserved subgroup RBCs stored at 4℃for 3 days post-thaw.Conclusion The predominant A subgroups in Zhongshan donors are A2 and B(A).A preliminary database for A2 and A2B subgroups is established,along with the discovery of a novel ABO allele mutation.Cryopreservation with glycerol,PEG antibody concentration,and ProClin 300 preservative demonstrate effective applications in preserving ABO blood group antigens and antibodies.

Objective To investigate the distribution of A subgroups in the A and AB blood type populations among voluntary blood donors in Zhongshan,study the antigen-antibody characteristics of A subgroups,establish a local A subgroup database,and support the development of precision medicine.Methods ABO subgroup screening was performed using the microplate method.Specimens negative for monoclonal anti-A1 reactivity underwent sequencing of exons 1～7 of the ABO gene to confirm genotypes.Cryopreservation and thawing of glycerolized subgroup red blood cells(RBCs),as well as preservation efficacy of concentrated human-derived antibodies with preservatives,were studied.Results Among 1 212 blood donor specimens,28 subgroup specimens were identified,with a prevalence of 1.54%(15/971)in blood type A and 5.39%(13/241)in blood type AB.Sequencing of 10 specimens revealed 7 ABO genotypes:ABO*A2.01/O.01.02(2 cases),ABO*A1.02/B.01(3 cases),ABO*BA.02/O.01.02,ABO*AW.31.02-05/A2.05,ABO*A2.05/B.01,ABO*A2new/O.01.01,and ABO*A1.02/O.01.01(1 case each).Additionally,one rare allele mutation(c.700C>G)and one novel allele mutation(c.203G>T)(GenBank accession number:PQ152337)were identified.Human anti-A1 antibodies with a titer of 8 were successfully concentrated.Optimal preservation conditions included 0.1%preservative concentration and cryopreserved subgroup RBCs stored at 4℃for 3 days post-thaw.Conclusion The predominant A subgroups in Zhongshan donors are A2 and B(A).A preliminary database for A2 and A2B subgroups is established,along with the discovery of a novel ABO allele mutation.Cryopreservation with glycerol,PEG antibody concentration,and ProClin 300 preservative demonstrate effective applications in preserving ABO blood group antigens and antibodies.

Objective:To investigate the serological and molecular genetic characteristics of a voluntary blood donor with combined FUT1 and ABO blood group gene variants causing para-Bombay and A2 subtype, and to review relevant literature on para-Bombay blood types carrying alleles such as FUT101W.37 and FUT101W.23. Methods:A blood donor with para-Bombay and A 2 subtype who participated in voluntary blood donation at the Dongguan Blood Center in August 2023 was selected as the study subject. Serological tests were performed to identify the ABO blood group, Lewis blood group antigens, and unexpected serum antibodies in the donor. Adsorption-elution test was conducted to detect trace antibodies in the blood donor′s plasma to trace the A, B and H antigens on the red blood cell surface. Sanger sequencing was carried out to analyze the sequences of the FUT1 and ABO genes. Using keywords such as " para-Bombay" " FUT1*01W.37" and " FUT1*01W.23" both in Chinese and English, relevant literature on para-Bombay blood type subjects carrying FUT1*01W.37 and FUT1*01W.23 alleles was retrieved from the CNKI, Wanfang Data Knowledge Service Platform, and PubMed databases, and the retrieval time was set as from the establishment of database to December 2022. This study has been approved by the Ethics Committee of Dongguan Blood Center (No. 2022005), and informed consent of blood donation was obtained from the blood donor. Results:Serological testing of the blood donor revealed inconsistent results between forward and reverse ABO blood typing, negative H antigen on the red blood cell surface, Le(a-b+ ) secretor type for Lewis blood group, and unexpected anti-H antibodies in the plasma, indicating a suspected para-Bombay type. Absorption-elution test suggested the blood type of the blood donor to be para-Bombay and A subtype. Sanger sequencing showed that the donor has harbored homozygous FUT1*(c.35T+ c.803A)/(c.35T+ c.803A) variant, with the FUT1*(c.35T+ c.803A) allele containing a dual nucleotide variant unrecorded by the International Society of Blood Transfusion (ISBT) FUT1 gene variant database, which was similar to the weakly functional allele of FUT101W. 37(c.803G>A) as recorded by the ISBT database. The ABO genotype was heterozygous ABOA2.05/O.01.02. Combining the results of serological and genetic testing, the blood type of the blood donor was determined to be para-Bombay and A 2 subtypes. Literature review has identified a pregnant women from Qingdao carrying the FUT1*01W.37 allele and 2 individuals carrying a heterozygous FUT1*01W.23 allele. Conclusion:This study has discovered a blood donor with coexisting para-Bombay and ABO subtype blood groups. Based on the characteristics of red blood cell surface antigens, the FUT1*01W.37 as classified as an FUT1 null allele.

Objective To explore the clinical value of laparoscopic radical cystectomy based on fascia anatomy for bladder cancer treatment.Methods The clinical data of 51 patients with bladder cancer who underwent 3D laparoscopic radical cystectomy during Jan.2015 and Jun.2022 were retrospectively analyzed.The surgery was performed based on membrane anatomy technology along four longitudinal and two transverse planes to complete the radical cystectomy.The pelvic plexus was preserved for patients with normal preoperative sexual function.Results All surgeries were completed without conversion to open operation.The mean operation time was(502.52±108.99)min,mean intraoperative blood loss was(275.96±155.18)mL,mean postoperative drainage time was(4.14±2.41)d,and the mean postoperative hospital stay was(16.37±4.85)d.The mean number of lymph nodes removed was(17.98±11.48).The mean postoperative follow-up was(30.27±19.39)months.At the last follow-up,no Clavien ≥grade 3 complications were observed.The estimated overall survival(OS),tumor-specific survival(TSS),and recurrence-free survival(RFS)were 82.4％,92.2％,and 88.2％,respectively.The lymph node positive patients had shorter OS and RFS(60.0％,60.0％)than the lymph node negative patients(84.8％,91.3％).Among the 19 male patients who underwent radical cystectomy with pre-exposure and preservation of pelvic plexus,daytime and nocturnal continence rate were 83.3％and 72.2％,respectively,and 17 patients recovered potency within 6 months postoperatively.Conclusion Laparoscopic radical cystectomy based on fascia anatomy is safe and effective in laparoscopic radical cystectomy,with standardized surgical procedure,satisfactory oncological outcomes,little hemorrhage,few complications and fast recovery.

The proband was a 33-year-old pregnant woman (G4P1) who suffered spontaneous abortion in the first 3 months of pregnancy without a history of blood transfusion or transplantation. The fourth pregnancy was clinically diagnosed with threatened abortion, and a cesarean section was performed on June 28, 2023, at the Obstetrics and Gynecology Department of Dongguan Hospital of Traditional Chinese Medicine. During cross-matching tests, unexpected antibodies were detected in the proband′s plasma, which could not be specifically identified, and no suitable donor red blood cells could be found. The blood samples were sent to the Blood Transfusion Laboratory of Dongguan Blood Center. The laboratory used serology to identify the erythrocyte phenotype of the proband and confirmed the proband as having a rare p blood group. The unexpected antibody was identified as anti-PP1P K, and gene sequencing of the proband revealed that the new allele A4GALT* (c.100G>A+c.418_428delins) was homozygous, which is speculated to cause changes in the polypeptide chains p.Veral34ile and p.GERln140TRPFS *73, and inactivation of α1, 4-galactosyltransferase. At the same time, another new allele A4GALT*c.100G>A was found in family members, and it was predicted that the single change of p.Val34Ile caused by this mutation would not affect protein function or enzyme activity.

OBJECTIVE: To explore the genetic mechanism underlying a case with para-Bombay phenotype. METHODS: The ABO and Lewis phenotype were identified with serological methods. The coding regions of exons 6 and 7 of the ABO and FUT1 genes were amplified with PCR and directly sequenced. Haploid sequence analysis was carried out on the variant sites of the FUT1 gene. RESULTS: Serological analysis confirmed that the proband has a rare para-Bombay phenotype. Direct sequencing revealed that he was a B.01/O.01.02 heterozygote for the ABO gene, and had heterozygous deletion for the 768 and 881-882 sites of the FUT1 gene. Further haploid analysis showed that the c.881_882delTT deletion has occurred in one haploid while c.768delC was present in the other haploid. The proband was therefore determined as a FUT1*01N.13/01N.20 heterozygote, which have resulted in frameshift in polypeptide chain p.Phe294Cysfs*40 and p.Val257Phefs*23, respectively. CONCLUSION A rare bi-allelic heterozygous deletion of para-Bombay phenotype has been identified in a blood donor. The c.881_882delTT and c.768delC deletions may decrease the activity of α-1,2-fucosyltransferase.
Animals ; Male ; ABO Blood-Group System/genetics* ; Alleles ; Fucosyltransferases/genetics* ; Genotype ; Heterozygote ; Mutation ; Phenotype ; Humans

【Objective】 To construct a platelet digital matching information system (PMIS). 【Methods】 The framework of PMIS was designed and the main functions were developed. The information system was connected with the information modules of clinical application, laboratory testing, blood donation service, blood inventory and distribution. Further, the preliminary application of this system will be carried on in clinical. 【Results】 The PMIS had been successfully developed and 5048 blood donors with HLA and HPA genotypes were registered in the system. A total of 306 patients applied for matching and 16.5% of them received compatible platelet reports immediately from the inventory bloods, with the median waiting time of all matching as 3 days, which was significantly shorter than that of the manual method (3.8±3.1 days vs 5.4±5.4 days). 【Conclusion】 The developed PMIS has realized the whole process management of blood donors and patients, which is helpful to improve the platelet matching level.

【Objective】 To establish the HLA-A, -B genotype-matched transfusion strategy for immune-mediated PTR patients based on donor HLA genotyping database, so as to improve the transfusion efficacy. 【Methods】 The serologic cross-match was used to screen immune PTR primarily. 35 PTR patients screened out were subjected to HLA-match. 24 patients were tested for HLA-A, -B genotyping and antibodies against platelet HLA classⅠ, and then received a total of 83 HLA-typed platelet transfusions, based on patient platelet genotype, donor specific antibody (DSA)(priority), and HLA-A, -B cross-reactive groups (CREGs) principle(lower priority). The other 11 patients received a total of 55 HLA-A/B-matched transfusions according to CREGs principle. The clinical information and transfusion outcome were followed up, and the corrected count increment (CCI) was calculated and statistically analyzed. 【Results】 A total of 453 ABO serological cross-matching tests were performed for 35 PTR patients, with 12.94 tests (453/35) per patient, an average of 4.21 (1908/453) donors per test and positive rate of 69.86% (1333/1908). 23 out 24(95.83%) patients, subjected to HLA class I antibody, were positive and each carried (44.37 ± 22.31) kinds of specific antibodies. According to the fluorescence intensity of the antibody in the patient′s serum, the antibody was strongly positive in 17(73.91%) cases, positive 20(86.96%) and weakly positive 23(100%). After 138 HLA-matched transfusions, the first mean CCI value was 14.08 ± 11.12 (23.95 ± 21.28 h), which was significant higher than 1 hour CCI (>7.5 effective) or 24 hours CCI (> 4.5 effective). The responses of DSA avoidance group (CCI of 1st =15.56±11.00)was significant higher than that of non-DSA avoidance group(CCI of 1st =11.86±12.00)(t=2.045, P<0.05). 49.28% of the patients had one or more non-immune factors during platelet transfusion. 【Conclusion】 The HLA-matched platelet transfusion is feasible to prevent and improve immune-mediated PTR. For patients with multiple blood transfusions and positive platelet antibodies, DSA avoidance and CREGs principle combined transfusion strategy can significantly improve the efficacy of blood transfusion and provide accurate platelet transfusion for the clinical.

Objective To compare with the characteristics of different demographic and blood donation behaviors of the first blood donors and the repeated blood donors,to analyze the related factors influencing the repeated blood donation behavior,to provide the evidence to develop the recall strategy for the retention of the first-time donors strategies.Methods Use methods such as the composition ratio of descriptive analysis,and logistic regression analysis,Retrospectively analyzed the data of 3 226 571 cases of the whole blood donors in Zhejiang province from 2006 to 2015.from BIS2.0 Results ZheJiang repeated blood donors in 2006-2015 is accounted for 30.8％,men (57.8％),the proportion of aged 25 above is higher than the first blood donors;71.7％ of men in the repeated blood donors are 60-79 kg,52.2％ of women repeated blood donors are 50 to 59 kg;40％ of the repeat donors blood for the first time donate 400 mL;71.6％ of the repeated blood donors to donate again in 0.5-2 years,and of these,40.8％ back in 0.5-1 year.Conclusion The main factors on the demographic aspects that influence the repeated blood donation is occupation,cultural degree,the quantity of blood donation for the first time.The characteristics of the precise recall people are as follows:Age 26 to 45 years old,stable career,donate 400 mL for the first-time,weight 70-89 kg of male,weight 55 kg above of women.The better recall intervention Interval is preferred to 0.5-2 years,and 0.5-1 year is the best.

Immunotherapy which has been in practice for more than 20 years proves effective for the treatment of metastatic renal cell carcinoma (mRCC). Anti-angiogenesis-targeted therapy has recently been identified as a promising therapeutic strategy for mRCC. This study was aimed to evaluate the effectiveness of vascular endothelial growth factor (VEGF) pathway-targeted therapy for mRCC by comparing its effectiveness with that of immunotherapy. The electronic databases were searched. Randomized controlled trials (RCTs) on comparison of VEGF inhibiting drugs (sorafenib, sunitinib and bevacizumab) with interferon (IFN) or placebo for mRCC treatment were included. Data were pooled to meta-analyze. A total of 7 RCTs with 3451 patients were involved. The results showed that anti-VEGF agents improved progression-free survival (PFS) and offered substantial clinical benefits to patients with mRCC. Among them, sunitinib had a higher overall response rate (ORR) than IFN (47% versus 12%, P<0.000001). Bevacizumab plus IFN produced a superior PFS [risk ratio (RR): 0.86, 95% confidence interval (CI): 0.76-0.97; P=0.01] and ORR (RR: 2.19; 95% CI: 1.72-2.78; P<0.00001) in patients with mRCC over IFN, but it yielded an increase by 31% in the risk of serious toxic effects (RR: 1.31; 95% CI: 1.20-1.43; P<0.00001) as compared with IFN. The overall survival (OS) was extended by sorafenib (17.8 months) and sunitinib (26.4 months) as compared with IFN (13 months). It was concluded that compared with IFN therapy, VEGF pathway-targeted therapies improved PFS and achieved significant therapeutic benefits in mRCC. However, the risk to benefit ratio of these agents needs to be further evaluated.