Hematopoietic Bone Marrow Transplantation Research Articles

First reported case of thymoma-associated multiorgan autoimmunity induced by COVID-19.

Thymoma-associated multiorgan autoimmunity (TAMA) presents with skin symptoms similar to those of graft-versus-host disease (GVHD), liver dysfunction, and enteritis, in the absence of a history of hematopoietic stem cell or bone marrow transplantation. TAMA is a type of paraneoplastic syndrome associated with thymoma. Its etiology is unclear but is thought to be a result of breakdown of immune tolerance. Histopathologically, TAMA is characterized by epidermal acanthosis with parakeratosis, individual cell keratinization, liquefaction degeneration, and intraepidermal infiltration of CD8-positive lymphocytes. A 64-year-old female patient with a history of myasthenia gravis and thymoma treated with prednisolone (10 mg/day) and cyclosporine (150 mg/day) experienced erythema on her trunk after coronavirus disease 2019 (COVID-19) onset. A psoriatic drug eruption was suspected and the possible causative drug was discontinued, but the skin rash failed to improve. A skin biopsy demonstrated GVHD-like histopathological findings. Diarrhea, abdominal pain, and duodenal perforation occurred concurrently, leading to the diagnosis of TAMA. Thereafter, the patient continued prednisolone and cyclosporine in the same doses as the TAMA treatment and added topical steroids. During the disease course, candida fungemia and cytomegalovirus infection developed, resulting in the patient's death. The TAMA was considered to have been caused by the release of inflammatory cytokines, autoreactive T cell activation, and regulatory T cell dysfunction induced by COVID-19.

Current and Future Therapeutics for Treating Patients with Sickle Cell Disease.

Sickle cell disease (SCD) is the most common genetic blood disorder in the United States, with over 100,000 people suffering from this debilitating disease. SCD is caused by abnormal hemoglobin (Hb) variants that interfere with normal red blood cell (RBC) function. Research on SCD has led to the development and approval of several new SCD therapies in recent years. The recent FDA-approved novel gene therapies are potentially curative, giving patients an additional option besides a hematopoietic bone marrow transplant. Despite the promise of existing therapies, questions remain regarding their long-term pharmacological effects on adults and children. These questions, along with the exorbitant cost of the new gene therapies, justify additional research into more effective therapeutic options. Continual research in this field focuses on not only developing cheaper, more effective cures/treatments but also investigating the physiological effects of the current therapies on SCD patients, particularly on the brain and kidneys. In this article, we undertake a comprehensive review of ongoing clinical trials with completion dates in 2024 or later. Our exploration provides insights into the landscape of current therapeutics and emerging novel therapies designed to combat and potentially eradicate SCD, including the latest FDA-approved gene therapies.

Therapeutic use of autologous hematopoietic bone marrow transplant combined with concentrated platelet in infected surgical wounds: single-center prospective study

The healing wound is the consecutive process of maintaining tissue integrity including inflammatory, proliferative, and remodeling processes. Stem cells can self-renew, and also to differentiate into all cell types, and are involved in physiological regeneration, use of mesenchymal stem cells deriving from the bone marrow with PRP has potentiated the healing process. We conducted a single-arm pilot prospective analytical study was performed on 15 patients whose mean age was 31 years (range: 29–51 years), with refractory abdominal wounds at a private hospital in Iraq from March 30, 2022, to March 2023. Ten days after the stem cell transplant the re-enforcement with PRP subcutaneous injection around wounds. Small papules of granulation tissue appeared over the wound, and tissue granulation increased from 80% (30.26–80.00%) to 100% (81–100%). At the same time, the wound size was reduced by 60% (52.10–78.23%). The follow-up period was 7–24 months, during which no recurrence of the wound was found. In conclusion, the current study is the first to characterize the safety and efficacy of bone marrow-derived stem cells in combination with PRP in the treatment of refractory abdominal wound infection. All patients achieved a 100% healing rate in a short time, and no treatment-related adverse reactions occurred during the treatment.

Lessons Learned From Ocular Graft versus Host Disease: An Ocular Surface Inflammatory Disease of Known Time of Onset.

The ocular surface inflammatory disorders (OSIDs) comprise a group of conditions characterized by persistent inflammation of the ocular surface and adnexal tissues. Systemic autoimmune diseases and hypersensitivity reactions cause them, and, if left untreated, can result in severe inflammatory dry eye, corneal damage, and vision loss. Ocular graft-versus-host disease (oGVHD) forms part of the ocular surface inflammatory disease umbrella. It is a condition occurring after allogeneic hematopoietic stem cell or bone marrow transplantation, usually in chronic graft-versus-host disease. oGVHD can virtually affect any ocular adnexal tissue, especially the meibomian glands, and cause persistent inflammation, tissue fibrosis, and subsequent chronic, severe dry eye disease. Among the OSIDs, oGVHD has the particularity that it has a "time zero," meaning we know when the disease started. As such, preclinical models have leveraged this to investigate the molecular mechanisms involved in the damage oGVHD causes to the ocular surface. In oGVHD, establishing a "time zero" allows for predicting the clinical course and establishing adequate treatment. This is also possible because the inflammatory infiltration occurs in ocular surface tissues, which are readily accessible. Using oGVHD, we might be able to understand the immune response mechanisms in other OSIDs better (i.e., Sjögren syndrome, Stevens-Johnson syndrome, among others). This review presents an up-to-date overview of the pathogenesis, clinical presentation, and treatment of oGVHD. In addition, we will discuss the value of the "time zero" concept in the study of oGVHD.

Daha Önce Tanı Almamış İnsan İmmünyetmezlik Virüsü Pozitif Hastada Plazmablastik Lenfoma: Bir Olgu Sunumu

Plasmablastic lymphoma (PBL) is a rare and aggressive non-Hodgkin lymphoma subtype associated with human immunodeficiency virus (HIV) infection. PBL is extremely aggressive and has a poor response to treatment. Clinically PBL resembles a periodontal disease, Kaposi sarcoma, or melanoma. Delayed diagnosis adversely affects the treatment and life expectancy. A 52-year-old male presented with a firm intraoral mass causing a slight elevation noticeable extraorally. Radiologically, loss of lamina dura around the first premolar and loss of both vertical and horizontal bone height around the dental implant replacing the second premolar were present. The biopsy confirmed a diagnosis of PBL. Further evaluation revealed that the patient was positive for HIV. The chemotherapy regimen included etoposide, vincristine, hydroxydaunorubicin, cyclophosphamide, and prednisolone, followed by an autologous hematopoietic stem cell bone marrow transplant. This article attempts to describe the clinical presentation and histopathological evaluation of PBL, and emphasize the paramount role of biopsy, early clinical suspicion, and correct diagnosis.

Short-Term Impact of Hematopoietic Stem Cell Transplantation in Leukemia Patients on Bone Bio Markers, Electrolytes and Blood Profile

Hematopoietic stem cell transplantation (HSCT) or Bone Marrow Transplantation (BMT) has significantly improved the survival rates of patients suffering from hematological malignancies. However, the cure can only be achieved at the price of morbidity and long-term complications such as bone diseases leading to fractures and osteopenia. Several studies have reported the impact of organ transplants on bone metabolism, electrolytes and blood profile. This prospective observational clinical study aims at elucidating the effects of HSCT on bone metabolism, electrolytes and blood profile in leukemia patients. Sixty patients were included in this study. The current study aimed to evaluate the short-term (30 days) impact of HSCT on bone biomarkers [osteoprotegerin (OPG) and alkaline phosphatase], electrolytes (calcium, sodium, potassium, and magnesium), and blood profile [hemoglobin, absolute neutrophil count (ANC), platelet, and total leucocyte count (TLC)] in leukemia patients undergoing HSCT from their record files before HSCT (TP1) and after 30 days of HSCT (TP2). Further, the correlation among various parameters at TP2 was assessed using Spearman correlation analysis. At TP2, the level of OPG, alkaline phosphatase, calcium, magnesium and TLC increased significantly compared to TP1. However, no significant change was observed in other parameters at TP2 compared to TP1. A statistically significant positive correlation of TLC with hemoglobin and sodium; and magnesium with alkaline phosphatase was observed. Furthermore, a significant negative correlation between hemoglobin and calcium was observed. Even though there was a statistically significant increase in the level of OPG, alkaline phosphatase, calcium, magnesium and hemoglobin after 30 days of HSCT, the level of bone biomarkers, electrolytes and blood profile were in the normal physiological range. However, additional studies are required to get a detailed understanding of the changes in parameters after HSCT.

525 - A case of atypical inflammatory myopathy in a 4-year-$$$old girl after hematopoietic bone marrow transplantation

525 - A case of atypical inflammatory myopathy in a 4-year-$$$old girl after hematopoietic bone marrow transplantation

Autologous hematopoietic bone marrow and concentrated growth factor transplantation combined with core decompression in patients with avascular necrosis of the femoral head.

The study aimed to assess the effectiveness of autologous hematopoietic bone marrow and concentrated growth factor (CGF) transplantation and core decompression in patients with avascular necrosis of the femoral head (ANFH). We performed a single-center prospective study on 31 patients with non-traumatic early-stage (stage I to III) ANFH based on the 1994 classification of the Association Research Circulation Osseous (ARCO). The patients were subjected to bone marrow aspiration from the posterior iliac crest, separation, and concentration of growth factors from the bone marrow aspirate, core decompression of the femoral head, and injection of hematopoietic bone marrow and CGFs into the necrotic lesion. Patients were evaluated using the visual analogue scale, the WOMAC questionnaire, and X-ray and MRI examinations of the hip joints before, at 2, 4, and 6 months after the intervention. Patients had a mean age of 33 years (range 20-44 years), 19 (61%) of them being male and 12 (39%) females. The presentation of the disease was bilateral in 21 patients and unilateral in 10 patients. The main cause of ANFH was steroid treatment. The mean VAS and WOMAC scores were 48.37 (SD: 14.67) out of 100, and the mean VAS pain score was 50.83 out of 100 (SD: 20.46), respectively, before transplant. This value significantly improved to 22.31 (SD 12.12) of 100, and the mean VAS pain score was 21.31 of 100 (SD: 20.46) (P=0.04). MRI showed a significant improvement (P=0.012). Our results suggest that autologous hematopoietic bone marrow and CGFs transplantation with core decompression have a beneficial effect in early-stage ANFH.

Effects of Exercise Programs on Psychoemotional and Quality-of-Life Factors in Adult Patients with Cancer and Hematopoietic Stem Cell Transplantation or Bone Marrow Transplantation: A Systematic Review

This review analyzed the effects of an exercise program on psychoemotional and quality-of-life (QoL) factors in adult patients with cancer and hematopoietic stem cell transplantation (HSCT) or bone marrow transplantation (BMT). Studies were identified from the PubMed and Web of Science databases (from inception to 24 August 2022), according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) checklist. The methodological quality of the included studies was assessed with the Physiotherapy Evidence Database (PEDro) scale, based in turn on the Delphi list. A total of 20 randomized controlled studies were included with 1219 participants. The main result of this systematic review is that exercise program interventions produce improvements on psychoemotional and QoL factors in adult patients with cancer and HSCT or BMT. Moreover, exercise programs may have a beneficial effect on health, maintaining or increasing the patient's QoL. Further, it has a positive effect on the prevention and control of transplant complications in combination with medical treatment.

Prevalence of neurotrophic keratopathy in patients with chronic ocular graft-versus-host disease

PurposeTo determine the prevalence, clinical characteristics, and risk factors associated with neurotrophic keratopathy (NK) in patients with chronic ocular graft-versus-host disease (oGVHD). DesignRetrospective cohort study. MethodsWe performed a chart review of patients diagnosed with chronic oGVHD between January 2015 and December 2018 at a single academic institution and recorded demographic data, systemic and ocular comorbidities, history of hematologic malignancy, transplant characteristics, oGVHD severity scores, and adnexal and ocular examination findings. We determined the prevalence of NK and clinical characteristics associated with NK in these patients. A multivariate logistic regression analysis was performed to determine the risk factors associated with NK in these patients. Main outcome measurePrevalence of NK in chronic oGVHD. ResultsWe identified 213 patients diagnosed with chronic oGVHD following hematopoietic stem cell or bone marrow transplantation from our electronic patient database, and the prevalence of NK was 14%. The mean age of oGVHD patients with NK was 62.6 ± 12.9 years; 48% were women, 19 had unilateral NK, and ten had bilateral NK. In the cohort, 56%, 20%, and 24% eyes of the patients had grades 1, 2, and 3 of NK, respectively. The mean time to diagnose NK after transplantation was 52.9 ± 45.4 months. oGVHD patients diagnosed with NK had a significantly higher NIH oGVHD severity score (p = 0.04) and a lower corneal sensation score (p = 0.0001) than those without NK. Our analyses showed a significantly higher CFS score (p = 0.01) and a trend toward lower Schirmer test scores (p = 0.16) and tear break-up times (p = 0.08) in oGVHD patients with NK. Additionally, we observed a significantly higher prevalence of persistent epithelial defect (p = 0.0001), corneal ulceration (p = 0.0001), and corneal perforation (p = 0.005) in oGVHD patients diagnosed with NK. A logistic regression analysis to determine factors associated with NK showed that a higher NIH oGVHD score (odds ratio [OR] = 2.03, p = 0.026) and history of cataract surgery (odds ratio [OR] = 5.03, p = 0.001) are significant risk factors for NK in oGVHD patients. ConclusionsThe prevalence of NK in chronic oGVHD patients was 14% during the study period. Our analysis shows that oGVHD patients with a higher NIH oGVHD severity score and previous history of cataract surgery are at a higher risk of developing NK and may develop severe sequelae such as persistent epithelial defect or corneal ulceration.

STR typing of skin swabs from individuals after an allogeneic hematopoietic stem cell transplantation

One of the pre-requisites for forensic DNA analysis is the fact that all nucleated cells of a person carry the same genetic information. However, this is not the case for individuals who have received an allogeneic hematopoietic stem cell or bone marrow transplantation, as all new cells formed by the bone marrow no longer show the genetic information of the recipient but that of the donor, while all other cells still carry the original information before transplantation. Thus, STR typing of a blood sample after successful transplantation yields a DNA profile that differs from the recipient’s original profile and corresponds to the donor genotype instead. Evidence from a routine case suggests that transplanted individuals may show donor alleles in skin swabs, as well. In order to examine this issue more closely, various skin swabs from 28 patients who have received an allogeneic hematopoietic stem cell transplantation were examined in this study. Swabs from the right and left palm, the back of the hand, one of the two upper arms, and the neck were collected from each person. Ninety-one of the 140 resulting swabs delivered useful results. All of those samples showed mixtures of recipient and donor DNA with different mixture ratios and the proportions of donor and recipient alleles revealed inter- and intra-individual differences. Those results were discussed with respect to graft versus host disease.

Testicular Tissue Banking for Fertility Preservation in Young Boys: Which Patients Should Be Included?

Due to the growing number of young patients at risk of germ cell loss, there is a need to preserve spermatogonial stem cells for patients who are not able to bank spermatozoa. Worldwide, more and more clinics are implementing testicular tissue (TT) banking programs, making it a novel, yet indispensable, discipline in the field of fertility preservation. Previously, TT cryopreservation was predominantly offered to young cancer patients before starting gonadotoxic chemo- or radiotherapy. Nowadays, most centers also bank TT from patients with non-malignant conditions who need gonadotoxic conditioning therapy prior to hematopoietic stem cell (HSCT) or bone marrow transplantation (BMT). Additionally, some centers include patients who suffer from genetic or developmental disorders associated with prepubertal germ cell loss or patients who already had a previous round of chemo- or radiotherapy. It is important to note that the surgical removal of TT is an invasive procedure. Moreover, TT cryopreservation is still considered experimental as restoration methods are not yet clinically available. For this reason, TT banking should preferably only be offered to patients who are at significant risk of becoming infertile. In our view, TT cryopreservation is recommended for young cancer patients in need of high-risk chemo- and/or radiotherapy, regardless of previous low-risk treatment. Likewise, TT banking is advised for patients with non-malignant disorders such as sickle cell disease, beta-thalassemia, and bone marrow failure, who need high-risk conditioning therapy before HSCT/BMT. TT retrieval during orchidopexy is also proposed for patients with bilateral cryptorchidism. Since patients with a medium- to low-risk treatment generally maintain their fertility, TT banking is not advised for this group. Also for Klinefelter patients, TT banking is not recommended as it does not give better outcomes than a testicular sperm extraction later in life.

Effects of Exercise Programs on Physical Factors and Safety in Adult Patients with Cancer and Haematopoietic Stem Cell Transplantation: A Systematic Review.

This study looks at the effects of exercise programs on physical factors and safety in adult patients with cancer and hematopoietic stem cell transplantation (HSCT) or bone marrow transplantation (BMT). A systematic search was performed in the PubMed and Web of Science databases (from inception to 26 August 2021). A review was carried out following the Preferred Reporting Items for Systematic review and Meta-Analyses (PRISMA) checklist. The methodological quality of the included studies was assessed with the Physiotherapy Evidence Database (PEDro) scale, based, in turn, on the Delphi list. A total of 25 randomized controlled trials studies were included, comprising 1434 patients. The most significant result of this systematic review is that exercise program interventions are safe and produce positive changes in cardiorespiratory fitness, muscle strength, and the functional mobility-state in adult patients with cancer and HSCT or BMT. Only 3 patients from the 711 participants in the exercise interventions (i.e., 0.42%) reported adverse events related to exercise interventions. Moreover, exercise training programs may have a cardiological and muscular protective effect, as well as a healthy effect on the prevention and control of transplant complications, improving health outcomes.

Genetic Vaccination as a Flexible Tool to Overcome the Immunological Complexity of Invasive Fungal Infections.

The COVID-19 pandemic has highlighted genetic vaccination as a powerful and cost-effective tool to counteract infectious diseases. Invasive fungal infections (IFI) remain a major challenge among immune compromised patients, particularly those undergoing allogeneic hematopoietic bone marrow transplantation (HSCT) or solid organ transplant (SOT) both presenting high morbidity and mortality rates. Candidiasis and Aspergillosis are the major fungal infections among these patients and the failure of current antifungal therapies call for new therapeutic aids. Vaccination represents a valid alternative, and proof of concept of the efficacy of this approach has been provided at clinical level. This review will analyze current understanding of antifungal immunology, with a particular focus on genetic vaccination as a suitable strategy to counteract these diseases.

Antineoplastic agents used in pediatric hematopoietic bone marrow transplantation: a review about pharmacology and pharmaceutical issues.

This article proposes the characterization of the main chemotherapeutic agents used in hematopoietic stem cell transplantation in pediatric patients, carrying out a review of the main pharmacological and pharmacokinetic characteristics that are peculiar to children, as well as technical aspects for the handling, prescription, and administration of each one of these.
 It is extremely important that all professionals know how to recognize the characteristics of each drug and how its peculiarities impact the quality of patient's treatment, being able to predict and propose necessary interventions for potential problems of therapy, which can be identified and measured.

A Systematic Review of the Effect of Iron Chelation Therapy on Survival in Patients with Sickle Cell Disease and β-Thalassemia

Background: Patients with sickle cell disease (SCD) and beta (β)-thalassemia often require regular blood transfusions; however, each unit of blood contains approximately 200 mg of iron, which can rapidly lead to iron overload (IO). This can result in iron deposition in the heart, liver, and endocrine organs, ultimately leading to organ failure, including cardiac disease, liver fibrosis, and metabolic disorders. The introduction of iron chelation therapy (ICT) with deferoxamine (DFO) and more recently deferiprone (DFP) and deferasirox (DFX) has had a significant impact on IO, demonstrating reductions in serum ferritin level and liver iron content. Although ICT has become the standard of care over the past few decades, there are limited data on the effects of these agents on overall survival. The objective of this systematic review is to evaluate the impact of ICT on survival in patients with transfusion-dependent SCD or β-thalassemia.Methods: This systematic review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Protocols(PRISMA-P) guidelines. Electronic databases, including Embase, PubMed, Cochrane Library, and the World Health Organization (WHO) Clinical Trials Search Portal, along with American Society of Hematology annual meeting abstracts from 2010-2015 were searched to identify English language articles that were relevant to the topic. Search terms included “sickle cell anemia” or “SCA,” “sickle cell disease” or “SCD,” “beta thalassemia” or “thalassemia,” “iron chelation,” “iron overload,” “survival,” “death,” “study,” and “trial.” Abstracts identified by the literature were independently reviewed and only articles with unanimous support were included; when the eligibility of an abstract was disputed, a full copy of the article was retrieved for review. References were excluded for lack of evidence of survival analysis, comparison between regimens, or if trials had fewer than 25 patients. Details of the included studies were collected for categorization. Although a meta-analysis of the data was initially planned, there were too few studies with similar study parameters to complete the analysis.Results: For SCD, the literature search yielded 203 articles of which 6 were deemed relevant (Figure 1). Of these, 3 were excluded and 3 (published between 2001 and 2014) were included. Reasons for exclusion included small patient number, no comparator, and being a theoretical paper. Only 1 of the 3 was a randomized clinical trial (RCT). For β-thalassemia, theliterature analyses yielded 398 articles of which 40 were deemed relevant (Figure 2). After reviewing the articles, 22 were excluded while 18 (published between 1991 and 2015) were included. Reasons for exclusion included small patient number, no comparator, no survival data, no chelation data, or a focus on hematopoietic stem cell or bone marrow transplantation. Only 3 of the 18 were RCTs; the remainder were retrospective and/or longitudinal studies. Most data on effectiveness of ICT were from longitudinal studies that suggest treatment outcomes have improved significantly over time mainly due to the introduction of new and improved iron chelation agents, including oral treatments and combination therapy. Effectiveness was also investigated in studies evaluating treatment compliance that suggest survival is improved in patients compliant to ICT. Compliance has been enhanced with the introduction of oral agents such as DFP and DFX compared with DFO, which requires daily subcutaneous injections.Conclusions: This systematic review identified few RCTs of ICT reporting survival in SCD and β-thalassemia. Despite limited data, the available literature suggests that ICT improves overall survival in SCD and β-thalassemia. Survival may also have been affected by factors such as hydroxyurea usage and the number of blood transfusions. Newer oral treatments have improved compliance, shown to be an important factor in survival, although there have not been any prospective long-term RCTs adequately powered to compare the efficacy among available iron chelation agents in either SCD or β-thalassemia. [Display omitted] DisclosuresBallas:Novartis: Honoraria, Speakers Bureau. Zeidan:Takeda: Speakers Bureau; AbbVie, Otsuka, Pfizer, Gilead, Celgene, Ariad, Incyte: Consultancy, Honoraria; Otsuka: Consultancy.

Perceptions and Misperceptions of Early Palliative Care Interventions for Patients With Hematologic Malignancies Undergoing Bone Marrow Transplantation

Hematopoietic stem cell or bone marrow transplantation (BMT) is one of the most promising and potentially curative therapeutic options available for eligible patients with hematologic malignancies (HMs) or leukemias. However, the nature and clinical course of HMs, specifically for patients undergoing BMT, are associated with significant morbidity, symptomatology, healthcare service utilization, psychosocial and end of life issues, and overall decreased quality of life. Early palliative care (PC) consultations and utilization for patients with HMs have been shown to improve patient outcomes, satisfaction, and autonomy as well as caregiver burden, shared-decision making, and holistic care management. Despite the complexity of care and complications for patients with HM undergoing BMT, early PC interventions are systematically underutilized and understudied in this population compared to patients with solid tumors or non-HMs. Herein, the authors reviewed the current literature and knowledge to assess and report the perceptions and barriers to early PC utilization in the care of patients with HMs undergoing BMT. Clinical and cultural aspects of PC perceptions as well as current PC care models and potential directions for PC implementation were reviewed to inform future research studies and clinical practice guidelines necessary for the improvement of care and quality of life for HM patients undergoing BMT.

Reactive Oxygen Species and Nrf2: Functional and Transcriptional Regulators of Hematopoiesis.

Hematopoietic stem cells (HSCs) are characterized by self-renewal and multilineage differentiation potentials. Although they play a central role in hematopoietic homeostasis and bone marrow (BM) transplantation, they are affected by multiple environmental factors in the BM. Here, we review the effects of reactive oxygen species (ROS) and Nrf2 on HSC function and BM transplantation. HSCs reside in the hypoxic microenvironment of BM, and ROS play an important role in HSPC regulation. Recently, an extraphysiologic oxygen shock/stress phenomenon was identified in human cord blood HSCs collected under ambient air conditions. Moreover, Nrf2 has been recently recognized as a master transcriptional factor that regulates multiple antioxidant enzymes. Since several years, the role of Nrf2 in hematopoiesis has been extensively studied, which has functional similarities of cellular oxygen sensor hypoxia-inducible factor-1 as transcriptional factors. Increasing evidence has revealed that abnormally elevated ROS production due to factors such as genetic defects, aging, and ionizing radiation unexceptionally resulted in lethal impairment of HSC function and hematopoiesis. Both experimental and clinical studies have identified elevated ROS levels as a major culprit of ineffective BM transplantation. Lastly, we discuss the possibility of using small molecule antioxidants, such as N-acetyl cysteine, resveratrol, and curcumin, to augment HSC function and improve the therapeutic efficacy of BM transplantation. Further research on the function of ROS levels and improving the efficacy of BM transplantation may have a great potential for broad clinical applications of HSCs.

Comparison of the DONOR Lymphocyte Infusion and Second Allogeneic STEM-CELL Transplantation in the Treatment of First Hematological Relapse after Allogeneic STEM-CELL Transplantation in Adults with ACUTE Leukemia

Purpose: Relapse after allogeneic hematopoietic bone marrow transplantation (AHSCT) in acute leukemia is a poor prognosis indicator. Although there is no definite opinion about the optimal treatment chemotherapy, second allogeneic hematopoietic stem cell transplantation (AHSCT2) or donor lymphocyte infusion (DLI) are among the treatment options. Relapse after allogeneic transplantation remains unfortunately quite common and we frequently face difficult management decisions. The decision to offer either option is based on several factors, including donor availability, remission status, presence of disabling comorbidities, and center or physician preference. The aim of this study was to investigate the effect of AHBMT2 or DLI on survival in relapsed transplant patients suffers from acute leukemia. Method:We here in report a retrospective analysis of single-center experience with AHBMT2 and DLI to treat patients relapsing from acute leukemia after a first AHBMT from 2003 to 2018.We enrolled the study 20 patients who underwent DLI and 6 patients who underwent AHBMT2. Result:There was no significant difference in OS between the groups afterward intervention (p:0,9) The 2-year survival rate was 33% in the AHBMT2 group and 43% in the DLI group. After intervention, chronic GVHD was observed only in DLI group. Conclusion: DLI can be considered after relapse as a safer and less toxic method than AHBMT2. Disclosures No relevant conflicts of interest to declare.

Tuberculosis: A Complication after Hematopoietic Stem Cell Therapy (HSCT) and Bone Marrow Transplant

Tuberculosis: A Complication after Hematopoietic Stem Cell Therapy (HSCT) and Bone Marrow Transplant