[Observation of liver indexes in patients with relapsed/refractory multiple myeloma treated with CAR-T-cells based on BCMA]

Objective: To observe the characteristics of the evolution of liver indexes in patients with relapsed/refractory multiple myeloma (RRMM) treated with CAR-T-cells based on BCMA. Methods: Retrospective analysis was performed of patients with RRMM who received an infusion of anti-BCMA CAR-T-cells and anti-BCMA combined with anti-CD19 CAR-T-cells at our center between June 1, 2019, and February 28, 2023. Clinical data were collected to observe the characteristics of changes in liver indexes such as alanine aminotransferase (ALT), aspartate aminotransferase (AST), total bilirubin (TBIL), and direct bilirubin (DBIL) in patients, and its relationship with cytokine-release syndrome (CRS) . Results: Ninety-two patients were included in the analysis, including 41 patients (44.6%) in the group receiving a single infusion of anti-BCMA CAR-T-cells, and 51 patients (55.4%) in the group receiving an infusion of anti-BCMA combined with anti-CD19 CAR-T-cells. After infusing CAR-T-cells, 31 patients (33.7%) experienced changes in liver indexes at or above grade 2, which included 20 patients (21.7%) with changes in one index, five patients (5.4%) with changes in two indexes, and six patients (6.5%) with changes in three or more indexes. The median time of peak values of ALT and AST were d17 and d14, respectively, and the median duration of exceeding grade 2 was 5.0 and 3.5 days, respectively. The median time of peak values of TBIL and DBIL was on d19 and d21, respectively, and the median duration of exceeding grade 2 was 4.0 days, respectively. The median time of onset of CRS was d8, and the peak time of fever was d9. The ALT, AST, and TBIL of patients with CRS were higher than those of patients without CRS (P=0.011, 0.002, and 0.015, respectively). CRS is an independent factor that affects ALT and TBIL levels (OR=19.668, 95% CI 18.959-20.173, P=0.001). The evolution of liver indexes can be reversed through anti-CRS and liver-protection treatments, and no patient died of liver injury. Conclusions: In BCMA-based CAR-T-cell therapy for RRMM, CRS is an important factor causing the evolution of liver indexes. The evolution of liver indexes after CAR-T-cell infusion is transient and reversible after treatment.

[Long-term safety and activity of humanized CD19 chimeric antigen receptor T cells for children and young adults with relapsed/refractory acute lymphoblastic leukemia]

Objective: To investigate the efficacy and safety of humanized CD19-specific chimeric antigen receptor T cells (hCART19s) in treating children and young adults with relapsed/refractory acute lymphoblastic leukemia (R/R ALL) and to analyze relevant factors affecting its curative effect and prognosis. Methods: We conducted a single-center clinical trial involving 31 children and young adult patients with R/R B-ALL who were treated with humanized CD19-specific CAR-T cells (hCART19s) from May 2016 to September 2021. Results: Results showed that 27 (87.1%) patients achieved complete remission (CR) or CR with incomplete count recovery (CRi) one month after CAR-T cell infusion. During treatment, 20 (64.5%) patients developed grade 1-2 cytokine release syndrome (CRS) , and 4 (12.9%) developed grade 3 CRS. Additionally, two patients had grade 1 neurological events. During the follow-up with a median time of 19.3 months, the median event-free survival (EFS) was 15.7 months (95% CI 8.7-22.5) , and the median overall survival (OS) was 32.2 months (95% CI 10.6-53.9) . EFS and OS rates were higher in patients who have undergone hemopoietic stem cell transplantation (HSCT) than in those without [EFS: (75.0 ± 12.5) % vs (21.1 ± 9.4) %, P=0.012; OS: (75.0 ± 12.5) % vs (24.6 ± 10.2) %, P=0.035]. The EFS and OS rates were significantly lower in patients with >3 treatment lines than in those with <3 treatment lines [EFS: 0 vs (49.5±10.4) %, P<0.001; OS: 0 vs (52.0±10.8) %, P<0.001]. To the cutoff date, 12 patients presented with CD19(+) relapse, and 1 had CD19(-) relapse. Conclusion: hCART19s are effective in treating pediatric and young adult R/R ALL patients, with a low incidence of severe adverse events and reversible symptoms. Following HSCT, the number of treatment lines can affect the long-term efficacy and prognosis of pediatric and young adult R/R ALL patients.

[Effects of calcium supplementation during the pregnancy and early infancy stage on the body mass index and gut microbiota in the infants]

Objective: To investigate the effects of calcium supplementation during the pregnancy and early infancy stage on body mass index (BMI) and gut microbiota in the infants. Methods: A total of 1 752 healthy pregnant women and their infants (breast feeding) in two maternal and child health care hospitals of Beijing were chosen as the subjects in this study from May to October 2016. Questionnaires were used to obtain the general information and supplementation of calcium and vitamin D in mothers and their infants. The body length and weight of infants at birth and 6 months were recorded to calculate the BMI. The random number table method was used to randomly select 40 infants from each group for gut microbiota analysis (If less than 40 infants were all included in this study, 23 infants in the pregnancy and early infancy would be all treated with calcium supplements. There were 6 infants who was not added calcium during the pregnancy but added in the early infancy). Then it was compared that the effects of calcium supplementation during the pregnancy and early infancy on the BMI and gut microbiota composition of infants were determined at birth and 6 months. Results: Compared to the group with no calcium supplementation during the pregnancy ((12.76±1.23), (17.68±0.76)kg/m(2)), the BMI of infants at birth and 6 months in the group with calcium supplementation during the pregnancy ((13.51±0.47), (17.91±0.23)kg/m(2)) were significantly higher(P<0.05). In the group with maternal calcium supplementation, the BMI at 6 months ((18.63±0.52)kg/m(2)), BMI increment ((5.71±0.54)kg/m(2)) and the content of lactobacillus (21.04%±3.68%) in the only calcium supplementation subgroup in the early infancy were higher than those in only vitamin D supplementation subgroup ((17.69±0.89) kg/m(2), (4.17±1.01) kg/m(2) and 12.28%±3.86%) (P<0.05). In the group without maternal calcium supplementation, the content of lactobacillus (20.15%±4.87%) in the only calcium supplementation subgroup were also higher than those in only vitamin D supplementation subgroup (14.64%±3.71%) (P<0.05). Conclusion: Appropriate calcium supplementation during the pregnancy is good for the growth and development of the fetus. Calcium supplementation in the early infancy could increase the BMI of infants, and promote the growth of intestinal lactobacillus.

[Construction and in vitro verification of a new humanized anti-CD19 CAR-T cells with high affinity]

目的

构建人源化抗CD19嵌合抗原受体T细胞（CAR-T），通过体外实验验证其杀伤白血病细胞的能力。

方法

将人CD19的鼠源抗体（FMC63）进行了人源化改造，获得高亲和力的人源化CD19抗体；构建携带人源化CD19 CAR慢病毒载体，感染T细胞获得人源化CD19 CAR-T细胞（hCART19）；按不同效靶比将效应细胞[hCART19、未转染的T细胞（阴性组）及对照病毒转染的T细胞（对照组）]及靶细胞（CHO-K1-CD19及Raji细胞）混合培养，LDH释放实验及ELISA法检测hCART19杀伤白血病细胞的能力及细胞因子释放水平；白血病小鼠模型检测hCART19的杀瘤效果。

结果

LDH释放实验证实随着效靶比的不断增加，对靶细胞的杀伤率逐渐增加，当效靶比为10∶1时hCART19组的杀伤率最大，在Raji细胞中为（87.56±1.99）%，明显高于阴性组[（19.31±1.16）%]及对照组[（21.35±1.19）%]（P值均<0.001）。ELISA法检测显示Raji细胞作为靶细胞时，hCART19组IL-2水平[（10.56±0.88）pg/ml]及IFN-γ[（199.02±12.66）pg/ml]较阴性组[IL-2：（3.55±0.26）pg/ml；IFN-γ：（37.63±0.85）pg/ml]及对照组[IL-2：（2.92±0.32）pg/ml；IFN-γ：（52.07±3.33）pg/ml]明显升高（P值均<0.001）。以上实验在CHO-K1-CD19细胞作为靶细胞时也出现了相似的结果。给予白血病小鼠模型尾静脉分别注射hCART19、对照病毒转染的T细胞及未转染的T细胞，结果显示hCART19组小鼠存活时间>40 d，另外两组小鼠在20~30 d全部死亡，差异有统计学意义（χ²=11.73，P=0.008）。

结论

成功构建了具有抗白血病活性的人源化CD19 CAR-T细胞，为下一步的临床研究奠定了基础。

[Effect of docosahexenoic acid supplementation on infant's growth and body mass index during maternal pregnancy]

Objective: To investigate the effects of docosahexenoic acid (DHA) supplementation on infant's growth and BMI during pregnancy. Methods: A total of 1 516 healthy pregnant women delivered their babies in two maternal and child health care hospitals in Beijing and were chosen as the subjects in this cohort study from May to October 2015. Self-developed questionnaires were used to gather general information of the subjects, including age, height, weight, weight gain during pregnancy, delivery mode, DHA supplementation etc., before giving birth. Information on body length, weight, head circumference and BMI at birth and 6 months postnatal, of the infants were recorded. Breast milk was collected to test the fatty acid profiles by using the gas chromatography (GC) method at one to three months postnatally. Results: The overall rate of DHA supplementation was 47.76% among the pregnant women, in which introduction of DHA from the early and second stage of the pregnancy accounted for 49.31% and 39.64% respectively. When DHA supplementation began from the early pregnant stage, the DHA concentration showed an increase in the milk (P<0.05), whereas the supplementation began from the second and third stages did not affect the milk DHA concentration (P>0.05). Higher height and lower BMI were seen in the infants at birth and 6 months in the supplementation group when comparing to the non-supplementary group (P<0.05), with the greatest effects noticed in the earliest supplementation group. Specifically, the head circumference appeared larger from the early pregnant stage in the DHA supplementary group, than that in the non-supplement group (P=0.001). The increment of head circumference was larger than that in the other groups when the infants were 6-month old (P<0.01). Results from the partial regression analysis showed that during pregnancy, there were positive correlations between DHA supplementation and height (r=0.324, r=0.216), head circumference (r=0.221, r=0.302) as well as the increment of head circumference (r=0.276) at birth and 6 months (P<0.05). Whereas, a negative correlation was shown between DHA and the infants' BMI (r=-0.310, r=-0.371) (P<0.05) when supplementation was given during maternal pregnancy. Conclusions: When DHA supplementation program was carried out during maternal pregnancy, it could increase the height and head circumference and inhibit the rapid increase of BMI in the infants BMI. Our findings seemed helpful in promoting brain development and preventing the childhood obesity.

[Complications of cleft palate repair]

From May 1979 to April 1987, 528 cases of cleft palate were repaired with different techniques. Complications occurred in 91 cases. The techniques of operation and prevention of complication were discussed.