Diagnostic performance and clinical impacts of metagenomic sequencing after allogeneic hematopoietic stem cell transplantation.

Background: Metagenomic Next-Generation Sequencing (mNGS) is a rapid, non-culture-based, high-throughput technique for pathogen diagnosis. Despite its numerous advantages, only a few studies have investigated its use in patients undergoing allogeneic hematopoietic stem cell transplantation (allo-HSCT).

Methods: We conducted a retrospective analysis of 404 mNGS tests performed on 264 patients after allo-HSCT.

[The Relationship between Occurrence of aGVHD in Patients with Acute Myeloid Leukemia after Allogeneic Hematopoietic Stem Cell Transplantation and Immune Cell Components in Graft].

Objective: To explore the relationship between occurrence of acute graft-versus-host disease (aGVHD) and various immune cell composition in patients with acute myeloid leukemia (AML) after allogeneic hematopoietic stem cell transplantation (allo-HSCT).

Methods: The clinical data of 104 patients with AML undergoing allo-HSCT in our hospital were retrospectively analyzed, and the hematopoietic reconstitution and occurrence of GVHD were analyzed. Flow cytometry was used to detect the proportion of various types of immune cells in the grafts, the number of graft composition in patients with different degrees of aGVHD was calculated and compared, and to analyze the correlation between the severity of aGVHD in AML patients after allo-HSCT and the immune cell components in the graft.

[Clinical Analysis of Fusion Gene Positive Patients with Acute Leukemia].

Objective: To analyze the characteristics and prognosis of acute leukemia(AL) with fusion gene.

Methods: The clinical data of 17 patients over 14 years old newly diagnosed with positive AL admitted in Institute of Hematology and Blood Diseases Hospital from August 2017 to May 2021 were analyzed retrospectively.

Results: Among the 17 positive patients, 13 cases were diagnosed as T-ALL (ETP 3 cases, Pro-T-ALL 6 cases, Pre-T-ALL 3 cases, Medullary-T-ALL 1 case), AML 3 cases (2 cases M5, 1 case M0) and ALAL 1 case.

Safety and efficacy of a modified busulfan/cyclophosphamide conditioning regimen incorporating cladribine for autologous hematopoietic stem cell transplantation in acute myeloid leukemia.

This is a small phase I study examining the safety and efficacy of a cladribine (CLAD)-containing conditioning regimen prior to autologous hematopoietic stem cell transplantion (auto-HSCT) for patients with acute myeloid leukemia (AML). All patients, aged 15-54 years (median 32 years), had favorable/intermediate risk AML (n = 20) or acute promyelocytic leukemia (APL; n = 2) and no evidence of minimal residual disease (MRD) prior to transplantation. Fourteen of the 22 patients received the conditioning regimen as follows: busulfan (Bu) + cyclophosphamide (Cy) + CLAD + cytarabine (Ara-c) or idarubicin.

Herombopag promotes platelet engraftment and decreases platelet transfusion after allogeneic hematopoietic stem cell transplantation.

The delayed platelet engraftment associated with allogeneic hematopoietic stem cell transplantation (allo-HSCT) is a common complication and often results in increased transplant-related complications. A single-center, prospective, investigator-initiated pilot study was conducted to explore whether herombopag, a second generation thrombopoietin-receptor agonist, would promote platelet engraftment after allo-HSCT. Between 2/2022 and 06/2022, 17 individuals (median age 39; range 15-58 years) with hematological malignancies were enrolled.

Conditioning Regimen of 5-Day Decitabine Administration for Allogeneic Stem Cell Transplantation in Patients with Myelodysplastic Syndrome and Myeloproliferative Neoplasms.

Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is a potentially curative treatment for patients with myelodysplastic syndromes (MDS) and myelodysplastic/myeloproliferative neoplasms (MDS/MPN). However, post-HSCT relapse remains a major cause of treatment failure. Here we assessed the efficacy of a new conditioning regimen comprising decitabine (Dec), busulfan (Bu), cyclophosphamide (Cy), fludarabine (Flu), and cytarabine (Ara-c) for allo-HSCT in patients with MDS and MDS/MPN.

[Relationship between Early Peak Temperature and Neutropenia Duration in Acute Leukemia Patients after Chemotherapy and Its Mechanism].

Objective: To investigate the relationship between early peak body temperature and neutropenia duration and its potential mechanism.

Methods: A total of 111 patients with CR1 phase acute leukemia (AL) with neutropenia infection were enrolled in this study. The relationship between early peak body temperature and neutropenia duration was analyzed retrospectively, and the IL-6 serum level in patients with different peak of body temperature was detected, and the single cell culture system in vitro was established, the incorparation rate of EdU in vivo was detected, and the effect of IL-6 on mouse hematopoietic stem cells /progenitor cells was analyzed.

[The Effect of Serum Cytokine Levels prior Transplantation on the Outcome of Severe Aplastic Anemia Patients Received Allogeneic Hematopoietic Stem Cell Transplantation].

Objective: To identify the role of serum cytokine levels prior allogeneic hematopoietic stem cell trans-plantation (allo-HSCT) in the outcome of severe aplastic anemia (SAA) patients received allo-HSCT treatment.

Methods: The clinical data of 117 SAA patients received allo-HSCT were enrolled in this study. The overall survival (OS), graft versus host disease (GVHD) incidence and relationship of serum cytokines with OS and major transplantation complications were retrospectively analyzed.

BCR-ABL enhances the prolyl isomerase activity of Pin 1 by interacting with DAPK1 in ph ALL.

Philadelphia chromosome (Ph)/BCR-ABL-positive (ph ) ALL is the most common genetic abnormality associated with ALL and has been shown to confer the worst prognosis to both children and adults. Increasing evidence has revealed that the dysregulation of prolyl isomerase Pin 1 contributes to multicancer development and progression, including ALL, although the underlying molecular mechanisms remain unclear. Here, we report that the expression of Pin 1 was enhanced in ph ALL patient samples and was associated positively with the expression of BCR-ABL.

Outcomes of Adults with Acute Lymphoblastic Leukemia After Autologous Hematopoietic Stem Cell Transplantation and the Significance of Pretransplantation Minimal Residual Disease: Analysis from a Single Center of China.

Background: The postremission therapies for adult patients generally contain consolidation chemotherapy, allogeneic hematopoietic stem cell transplantation and autologous hematopoietic stem cell transplantation (auto-HSCT). Because of the various results from different centers, the optimal therapy for adult acute lymphoblastic leukemia (ALL) patients is still uncertain. This study aimed to better understand predictive factors and role of auto-HSCT in the postremission therapy for adult ALL patients.

[Analyses of risk factors for intestinal acute graft-versus-host disease after allogeneic hematopoietic stem cell transplantation].

Objective: To investigate the risk factors of intestinal acute graft-versus-host disease (aGVHD) after allogeneic hematopoietic stem cell transplantation (allo-HSCT).

Methods: The clinical data of 534 cases of 533 patients undergoing allo-HSCT during Jan 2004 and Sep 2012 were retrospectively analyzed. The effects of donor-recipient HLA mismatching, recipient age, donor age, donor-recipient sex combination, donor-recipient relationship, HSC source, conditioning regimen with or without total body irradiation (TBI) and HLA loci on intestinal aGVHD with different severity were analyzed by Logistic regression.

[Prophylaxis of invasive fungal infection with different administration regimens of itraconazole in patients with acute myeloid leukemia: a report from a randomized, controlled trial].

Objective: To evaluate the efficacy and safety of antifungal prophylaxis of itraconazole in patients with acute myeloid leukemia (AML) to probe the relationship of the antifungal effect and the adverse events with serum concentration.

Methods: From April 2009 to May 2011, a total of 310 courses from 112 patients referred to our institute were enrolled in this study; of them, 297 courses were eligible for analysis. Eligible cases were randomized into oral group and injection/oral group according to different chemotherapy of induction and consolidation.

[Synergistic immunomodulatory effects of interferon-gamma and bone marrow mesenchymal stem cells].

Objective: To investigate mesenchymal stem cells (MSCs) immunosuppressive activity in the presence of interferon-gamma (IFN-γ) to reveal synergistic immunomodulatory effects of IFN-γ and MSCs.

Methods: ① MSCs were cultured in the presence or absence of IFN-γ（100 ng/ml）, the supernatants were collected for measurements of PGE2、HGF and TGF-β1 by ELISA kits. ② MSCs were cultured in the presence or absence of IFN-γ （100 ng/ml）for 48 h.

[Autologous stem cell transplantation for adult patients with acute lymphoblastic leukemia and related prognostic factors].

Objective: This study was aimed to observe the efficacy of autologous stem cell transplantation (ASCT) for adult patients with acute lymphoblastic leukemia (ALL), and investigate related prognostic factors.

Methods: A total of 86 adult ALL patients underwent ASCT in Institute of Hematology and Blood Disease Hospital from November 2001 to January 2012 were followed up. Clinical characteristics and outcomes of all patients were retrospectively analyzed.

[Role of IFN-γ + 874 genetic polymorphisms in allogeneic hematopoietic stem cell transplantation].

Objective: To explore the impact of IFN-γ + 874 polymorphisms on the outcome in HLA matched sibling HSCT.

Methods: We used PCR-sequence-specific primer analysis (PCR-SSP) to analyze the polymorphisms of IFN-γ + 874 T/A in 80 recipient and donor pairs from October 2005 to March 2008.

Results: Recipients having donors who possessed IFN-γ + 874 A/A genotype had significantly earlier neutrophil recovery compared with those having donors with non-A/A genotype (15 (11 - 27) days vs 18 (12 - 30) days, P = 0.

The impact of recipient HLA-Cw and donor killer immunoglobulin-like receptor genotyping on the outcome of patients receiving HLA-matched sibling donor hematopoietic stem cell transplantation for myeloid malignancies.

Background: The alloreactivity of natural killer cell and certain subsets of T lymphocyte are regulated by the interaction between killer immunoglobulin-like receptors (KIRs) of donor cells and human leukocyte antigen (HLA)-class I molecules on target cells. The interaction has been shown to influence the outcome of allogeneic haematopoietic stem cell transplantation (HSCT). Homozygous C1 or C2 and heterozygous C1/C2 were divided by HLA-Cw typing and they influenced the outcome of HSCT.

[Outcome of allogeneic hematopoietic stem cell transplantation from HLA-matched sibling donor for 41 cases of severe aplastic anemia].

Objective: To evaluate the outcome of allogeneic hematopoietic stem cell transplantation (allo-HSCT) from HLA-matched sibling donor (MSD allo-HSCT) for severe aplastic anemia (SAA).

Methods: The clinical data of 41 SAA patients received MSD allo-HSCT from May. 2003 to Aug.

[Effect of alloreactive natural killer cells on immune reconstitution in mouse haploidentical bone marrow transplantation].

The study was purposed to investigate the effect of alloreactive natural killer (alloNK) cells on immune reconstitution in murine haploidentical bone marrow transplantation (BMT). The murine model of haploidentical BMT was established by using (C57BL/6×BALB/c)BCF(1)(H-2(d/b)) mouse as the donor, and BALB/c (H-2(d)) mouse as the recipient. Recipient mice were divided into BMT group, non-allo-reactive NK (non-alloNK) cell group and alloNK cell group according to different transfusion.

[Clinical features and antimicrobial resistance of Gram positive bacterial blood stream infection in patients with hematologic diseases].

Objective: To study the clinical characteristics and antimicrobial resistance of bloodstream infections caused by Gram positive bacteria, so as to provide reference for the rational use of antimicrobial agent.

Methods: One hundred and eight patients with bloodstream infections of Gram positive bacteria in our hospital from January 2009 to December 2009 were retrospectively reviewed. The clinical manifestations, pathogen types and antimicrobial susceptibility results of pathogens isolated from bloodstream were analyzed.