Current use of androgens in bone marrow failure disorders: a report from the Severe Aplastic Anemia Working Party of the European Society for Blood and Marrow Transplantation

Androgens represent the historical therapeutic backbone of bone marrow failure (BMF) syndromes. However, their role has rarely been analyzed in a prospective setting, and systematic and long-term data regarding their usage, effectiveness and toxicity in both acquired and inherited BMF are currently unavailable. Here, taking advantage of a unique disease-specific international dataset, we retrospectively analyzed the largest cohort so far of BMF patients who received androgens before or in the absence of an allogeneic hematopoietic cell transplantation (HCT), re-evaluating their current use in these disorders. We identified 274 patients across 82 European Society for Blood and Marrow Transplantation (EBMT) affiliated centers: 193 with acquired (median age 32 years) and 81 with inherited (median age 8 years) BMF. With a median duration of androgen treatment of 5.6 and 20 months, respectively, complete and partial remission rates at 3 months were 6% and 29% in acquired and 8% and 29% in inherited disorders. Five-year overall survival and failure-free survival (FFS) were respectively 63% and 23% in acquired and 78% and 14% in inherited BMF. Androgen initiation after second-line treatments for acquired BMF, and after >12 months post diagnosis for inherited BMF were identified as factors associated with improved FFS in multivariable analysis. Androgen use was associated with a manageable incidence of organ-specific toxicity, and low rates of solid and hematologic malignancies. Sub-analysis of transplant-related outcomes after exposure to these compounds showed probabilities of survival and complications similar to other transplanted BMF cohorts. This study delivers a unique opportunity to track androgen use in BMF syndromes and represents the basis for general recommendations on this category of therapeutics on behalf of the Severe Aplastic Anemia Working Party of the EBMT.

Stem Cell Transplantation for Diamond-Blackfan Anemia. A Retrospective Study on Behalf of the Severe Aplastic Anemia Working Party of the European Blood and Marrow Transplantation Group (EBMT)

Data on stem cell transplantation (SCT) for Diamond-Blackfan Anemia (DBA) is limited. We studied patients transplanted for DBA and registered in the EBMT database. Between 1985 and 2016, 106 DBA patients (median age, 6.8 years) underwent hematopoietic stem cell transplantation from matched-sibling donors (57%), unrelated donors (36%), or other related donors (7%), using marrow (68%), peripheral blood stem cells (20%), both marrow and peripheral blood stem cells (1%), or cord blood (11%). The cumulative incidence of engraftment was 86% (80% to 93%), and neutrophil recovery and platelet recovery were achieved on day +18 (range, 16 to 20) and +36 (range, 32 to 43), respectively. Three-year overall survival and event-free survival were 84% (77% to 91%) and 81% (74% to 89%), respectively. Older patients were significantly more likely to die (hazard ratio, 1.4; 95% confidence interval, 1.06 to 1.23; P < .001). Outcomes were similar between sibling compared to unrelated-donor transplants. The incidence of acute grades II to IV of graft-versus-host disease (GVHD) was 30% (21% to 39%), and the incidence of extensive chronic GVHD was 15% (7% to 22%). This study shows that SCT may represent an alternative therapeutic option for transfusion-dependent younger patients.

Epidemiology of aplastic anemia: a study of 1324 cases

Objective: Prevalence of aplastic anemia (AA) is high in the Asian population. This study was done to explore the etiology and association of AA with various socio-economic and environmental factors.Study design and setting: Study included 1324 consecutive AA cases registered at Armed Forces Bone Marrow Transplant Centre Rawalpindi, Pakistan, from March 2001 to August 2016. The study questionnaire was completed through an interview. It included patients' socio-demographic details, personal and family medical history, environmental attributes and clinico-hematological features.Results: The median age of patients was 20 years, 997 were male and 327 female. Distribution of non-severe, severe and very severe AA was 230 (17.4%); 598 (45.2%) and 496 (37.4%), respectively. The majority of patients were from low (n = 761, 57.5%) or middle socioeconomic class (n = 543, 41%). Consanguinity among patients (n = 806, 61%) was slightly higher than the national statistics. History of chemical exposures included fertilizers (n = 116, 8.7%), pesticides (n = 56, 4.2%) and industrial chemicals (n = 37, 2.8%). PNH clone was found in 63 of AA patients. After excluding 298 patients undergoing HSCT and 660 deaths/lost to follow-up, disease evolution was observed in 38(10.4%) patients out of 366 evaluable patients. These included PNH = 18, MDS = 11 and AML = 9.Discussion: Due to lack of funding and adequate human resource at the center, age and sex-matched controls could not be included. Other limitations were a lack of molecular testing to exclude the possibility of inherited bone marrow failure syndromes on a genetic basis.Conclusion: Younger age, male predominance and higher consanguinity point toward genetic factors in AA etiology among the South Asian population.

Bortezomib-based Triplet Regimens for Remission Induction in Multiple Myeloma

OBJECTIVE

To compare the efficacy and side effect profile of different bortezomib-based triplet regimens for remission induction in patients with multiple myeloma (MM).

STUDY DESIGN

Observational study.

PLACE AND DURATION OF STUDY

Armed Forces Bone Marrow Transplant Centre, Rawalpindi from January 2014 to December 2018.

METHODOLOGY

A total of 81 patients of MM, were registered from January 2014 to December 2018. In final analysis, 44 out of 81 patients were included as per inclusion/exclusion criteria. Bortezomib-based regimens were used either as first line (in newly diagnosed) or as second line (in relapsed/refractory bortezomib naïve patients) therapy. Three different bortezomib-based triplet therapies were used (1) VCd, (2) VRd and (3) VTd. As there were only two patients in VTd regimen group so for study purposes VRd and VTd were grouped together, i.e. Vd with an IMiD. Response to treatment was assessed using the IMWG criteria. Comparison between different bortezomib-based regimens was performed in terms of their tolerability and response rate after four cycles of chemotherapy.

RESULTS

Out of 44 patients, 79.5% (n=35) patients received bortezomib-based triplet regimen as first line therapy, and in 20.5% (n=9) patients as second line therapy. VCd was administered to 56.8% (n=25) and Vd with an IMiD was used in 43.1% (n=19, VRd in 17 and VTd in 2) of the patients. Response was assessed at the end of fourth cycle. Overall response rate was comparable in both groups, 88% in VCd versus 89.4% in Vd with an IMiD group (p=0.432). In VCd and Vd with an IMiD group, CR was observed in 52% (n=13) and 57.9% (n=11) patients, respectively. Disease remained stable in 6.8% (n=3) patients. Treatment was generally well tolerated. Comparative analyses of both treatment groups revealed that the frequency of peripheral neuropathy was significantly higher in Vd with an IMiD group (47.3% vs 8% p=0.03). Grade III/IV neuropathy observed in 15.7% (n=3) of the patients in Vd with an IMiD group vs none in VCd group. Grade III/IV cytopenias were more seen in VCd group then in Vd with an IMiD group (16% vs. 5.2% p=0.16).

CONCLUSION

The overall response rates were comparable in VCd and Vd with IMiD, with a better side effect profile seen with VCd regimen. Key Words: Multiple myeloma, Bortezomib, Triplet therapy, Remission induction, Peripheral neuropathy.

Outcome of hematopoietic stem cell transplantation (HCT) from HLA-matched related donor for Fanconi anemia (FA) in adolescents and adults: a retrospective study by Eastern Mediterranean Blood and Marrow Transplantation Group (EMBMT)

Hematopoietic Stem Cell Transplantation (HSCT) is the only potentially curative treatment option for the hematologic complications that occur in patients with Fanconi anemia (FA). In this study, we present a retrospective multicenter analysis from the Eastern Mediterranean Blood and Marrow Transplantation Group (EMBMT) of matched related donor HSCT for FA in adolescents and adults transplanted between 1988 and 2015. Forty-five patients received HSCT with a median age at transplant of 18 years, the interquartile range (IQR) (15-23.5); 25 (55.6%) patients were females and 20 (44.4%) were males. Conditioning regimen was fludarabine-based in 29 (64.4%) patients, irradiation-based in five (11.1%) patients, and the remaining patients received other combinations. Indication for HSCT was bone marrow failure in 39 (86.7%) and myelodysplastic syndrome in six (13.3%) patients. Stem cell source was bone marrow in 22 (48.9%), peripheral blood in 20 (44.4%), umbilical cord blood in one (2.2%), and combination of bone marrow and cord blood in two (4.4%) patients. Twenty-seven (60%) patients engrafted and five (11.1%) had primary engraftment failure. The median time to neutrophil engraftment was 14 days (range 10-21 days); median time for platelet engraftment was 17 days (10-33 days). The probability of developing grade II-IV acute GVHD for all patients was 7.0% and chronic GVHD 36.6%. No new malignancies were reported. The OS probability was 53.6% (95% CI, 38.3-68.9%) with a median follow-up of 13 months (95% CI, 1-240). Our HLA-matched related HSCT results in AYA patients with FA compare favorably with other reported international registry data.

Screening of the FANCA gene mutational hotspots in the Pakistani fanconi anemia patients revealed 19 sequence variations

Fanconi anemia (FA) is a recessive disorder that predispose to bone marrow failure and multiple congenital anomalies in affected individuals worldwide. To date, 22 FA genes are known to harbor sequence variations in disease phenotype. Among these, mutations in the FANCA gene are associated with 60% to 70% of FA cases. The aim of the present study was to screen FA cases belonging to consanguineous Pakistani families for selected exons of FANCA gene which are known mutational hotspots for Asian populations. Blood samples were collected from 20 FA cases and 20 controls. RNA was extracted and cDNA was synthesized from blood samples of cases. DNA was extracted from blood samples of cases and ethnically matched healthy controls. Sanger's sequencing of the nine selected exons of FANCA gene in FA cases revealed 19 genetic alterations of which 15 were single nucleotide variants, three were insertions and one was microdeletion. Of the total 19 sequence changes, 13 were novel and six were previously reported. All identified variants were evaluated by computational programs including SIFT, PolyPhen-2 and Mutation taster. Seven out of 20 analyzed patients were carrying homozygous novel sequence variations, predicted to be associated with FA. These disease associated novel variants were not detected in ethnically matched controls and depict genetic heterogeneity of disease.

Epidemiological, clinical and genetic characterization of aplastic anemia patients in Pakistan

Aplastic anemia (AA) is the most serious non-malignant blood disorder in Pakistan, ranked second in prevalence, after thalassemia. We investigated various epidemiological, clinical, and genetic factors of AA in a Pakistani cohort of 214 patients reporting at our hospital between June 2014 and December 2015. A control group of 214 healthy subjects was included for comparison of epidemiological and clinical features. Epidemiological data revealed 2.75-fold higher frequency of AA among males. A single peak of disease onset was observed between ages 10 and 29 years followed by a steady decline. AA was strongly associated with lower socioeconomic profile, rural residence, and high rate of consanguineous marriages. Serum granulocyte colony-stimulating factor and thrombopoietin levels were significantly elevated in AA patients, compared to healthy controls (P < 0.0001), while there was no statistical significance in other nine cytokine levels screened. Allele frequencies of DRB1*15 (56.8%) and DQB1*06 (70.3%) were predominantly high in AA patients. Ten mutations were found in TERT and TERC genes, including two novel mutations (Val526Ala and Val777Met) in exons 3 and 7 of TERT gene. Despite specific features of the AA cohort, this study suggests that epidemiologic and etiologic factors as well as host genetic predisposition exclusively or cooperatively trigger AA in Pakistan.

Cyclosporine induced neurotoxicity in a stem cell transplant recipient

Neurological complications are quite frequent in stem cell transplant (SCT) recipients. Major causes are conditioning regimen toxicity, metabolic and electrolyte disturbances, viral infections and cyclosporine related toxicity. Cyclosporine induced neurotoxicity is a well documented complication in stem cell transplant recipients. These patients usually present with seizures which are easily controlled with anti-convulsants and by reducing/withholding the drug. However uncontrolled seizures requiring ventilatory support are rarely reported. Here we present a case report of cyclosporine induced uncontrolled seizures in a young female after allogeneic SCT which was unresponsive to anti-convulsive therapy but was successfully treated with mechanical ventilatory support.

Successful allogeneic stem cells transplantation in severe aplastic anaemia complicated by dengue Fever

Aplastic anaemia is characterized by severe compromise of haematopoiesis and hypocellular bone marrow. Haemorrhagic episodes in patients with aplastic anemia occur usually secondary to thrombocytopenia and require frequent support with platelet concentrates and other blood products. Infection with dengue virus (particularly dengue sero type-2 of South Asian genotype) is associated with dengue haemorrhagic fever. Dengue infection further worsens the disease process in patients with aplastic anaemia due to uncontrolled haemorrhagic diathesis and major organ failure, which may prove fatal in these already immunocompromised patients, if not treated in time. Recent epidemics of dengue haemorrhagic fever has not only affected the southern region of our country but also spread to other areas of the country. With this background, we report a case of aplastic anaemia complicated by dengue haemorrhagic fever who achieved successful engraftment after allogeneic stem cell transplantation from sibling brother and is having normal healthy post transplant life.

Pulmonary tuberculosis in allogeneic stem cell transplant recipients

Mycobacterium tuberculosis is a serious, but rare infectious complication after allogeneic bone marrow transplantation. Tuberculosis is a major problem in South East Asia, particularly in India and Pakistan. We describe here infection due to mycobacterium tuberculosis in four patients after allogeneic stem cell transplantation (Allo SCT). The diagnosis was made on the bases of clinical findings, sputum / blood / pleural and pericardial fluids / broncho alveolar lavage (BAL) and tissue biopsy examination. Anti tuberculosis therapy (ATT) was started immediately after diagnosis. Three patients responded to antituberculosis therapy, where as one patient developed severe infective respiratory complications and died at six months post transplant. Mycobacterial infection should be considered in patients post allo SCT with unexplained fever, cough or pleuritic chest pain. These patients at diagnosis should be promptly treated with ATT.

Management of acute myeloid leukaemia--5 years experience at Armed Forces Bone Marrow Transplant Centre, Rawalpindi

OBJECTIVE

To evaluate the outcome in denovo AML patients treated with different remission induction and consolidation chemotherapy regimens in our population.

METHODS

A retrospective study on acute myeloid leukaemia (AML) patients was carried out at Armed Forces Bone Marrow Transplant Centre Rawalpindi Pakistan between July 2001 and June 2006. During 5 years period 46 patients received treatment for AML at our centre. Twenty nine patients were males and 17 were females. Median age of patients was 21 years (range: 7-56 years). These 46 patients were categorized into two groups on the basis of type of leukaemia and chemotherapy given. In group-I 40 patients (group Ia: 23 patients of M1-M6, less M3 group Ib: 17 patients of AML M3) received anthracycline and cytarabin based chemotherapy. In group-II, six patients (AML- M3) received all trans retinoic acid (ATRA) based chemotherapy.

RESULTS

In group Ia, out of 23 patients, 14 patients (60.8%) achieved complete remission (CR) after remission induction chemotherapy, 10 patients remained in CR after 3rd and 4th consolidation. Eleven patients died and five patients relapsed during treatment and follow up. In this group overall CR, relapse rate (RR) and mortality was 30.4% (7/23), 21.7% (5/23) & 48% (11/23) respectively. In group Ib out of 17 patients, 9 patients (53%) achieved CR after remission induction. Eleven patients died during treatment while one patient relapsed in this group. Overall CR, RR & mortality was 29.4% (5/17), 6% (1/17) & 55% (11/17) respectively. In group II all patients achieved CR (100%) after 1st course of chemotherapy. Two of these patients unfortunately died of uncontrolled sepsis during 1st consolidation, while remaining 4 patients 66.6% are on maintenance chemotherapy and are still in CR.

CONCLUSION

Overall CR, RR and mortality in all groups was 35% (16/46), 13% (6/46) and 52% (24/46) respectively at a median follow-up of 36 + 8 months. Survival in AML-M3 patients treated with ATRA based chemotherapy is significantly superior than anthracycline based chemotherapy (66.6% vs. 29.4%). Infection and chemotherapy toxicity being major causes of mortality.

Cardiac complications after stem cell transplantation

Cardiac insufficiency / toxicity has been recognized as a complication of intensive cytotoxic therapy used in stem cell transplant setting. The incidence of clinically significant cardiac toxicity following high dose chemotherapy ranges between 2 - 43% with mortality of 2 - 9%. Two patients are reported who developed life-threatening cardiac complications following cyclophosphamide and busulphan therapy requiring pericardiocentesis and pericardiectomy.

Cutaneous aspergillosis as a first manifestation of systemic infection in allogeneic haematopoietic stem cell transplantation

Infections are one of the major causes of morbidity and mortality after stem cell transplantation (SCT). Opportunistic infections of varying severity with bacterial fungal and viral organisms occur in > 90% of patients after allogeneic SCT. Fatal opportunistic infections have been reported in 4-15% of related transplant recipients and 12-28% of unrelated transplant recipients. More than half of the transplant patients affected by invasive aspergillosis die despite treatment. Cutaneous aspergillosis has been rarely reported in transplant patients. During last five years 154 patients underwent allo SCT at our centre for various haematological disorders. Aspergillus infection was observed in six patients. Three patients had systemic aspergillosis whereas other three patients had primary cutaneous aspergillus infection. Patients with primary cutaneous aspergillosis are presented here as case report.