Does ferritin level affect the outcomes of autologous stem cell transplantation equally in all diseases?

BACKGROUND: In this retrospective study, we evaluated the effect of ferritin levels on the outcomes of autologous stem cell transplantation in patients with MM or lymphoma. METHODS: In this study, 170 patients with measured ferritin levels within one month before transplantation who underwent ASCT with the diagnosis of MM or lymphoma were evaluated. The cut-off value of ferritin was determined as 500 ng/mL to evaluate the transplant outcomes in both groups. The hematological recovery status/duration, febrile neutropenia rate, hospitalization time, transplant-related mortality (TRM) in the first 100 days, and OS were evaluated according to the ferritin level RESULTS: Of all patients, 105 (61,8%) were diagnosed with MM and 65 (38.2%) with lymphoma. Ferritin levels had no statistically significant effect on the engraftment status/times, the febrile neutropenia rates, and hospitalization times of both lymphoma and myeloma patients (p > .05). Ferritin level was not significantly associated with TRM in MM (p = .224). However, in lymphoma, ferritin level was significantly associated with TRM (33.3% for ferritin level ≥500 ng/L vs. 5.3% for ferritin level ng/mL, p = .005). There was no statistically significant correlation between ferritin value and OS in MM group [ferritin level ≥ 500 ng/L: 39.9 months (95% CI: 33.7-46.1) and ferritin level 500 ng/mL: 39.4 months (95% CI: 36.5-42.2), p = .446]. Ferritin level was significantly associated with OS in patients with lymphoma [ferritin level ≥ 500 ng/L: 22.1 months 95% CI: 14.7-29.5), ferritin level 500 ng/mL: 27.3 months (95% CI: 22.4-32.2), p = .038] CONCLUSION: High ferritin level is important prognostic factor on survival after ASCT in patients with lymphoma.

International Forum: The Turkish perspective on apheresis activity: The Turkish apheresis registry report.

Therapeutic apheresis is an extracorporeal treatment that selectively removes abnormal cells or harmful substances in the blood that are associated with or cause certain diseases. During the last decades the application of therapeutic apheresis has expanded to a broad spectrum of hematological and non-hematological diseases due to various studies on the clinical efficacy of this procedure. In this context there are more than 30 centers performing therapeutic apheresis and registered in the apheresis database in Turkey. Herein, we, The Turkish Apheresis Registry, aimed to analyze some key articles published so far from Turkey regarding the use of apheresis for various indications.

Effect of extracorporeal photopheresis on survival in acute graft versus host disease.

BACKGROUND: Extracorporeal photopheresis (ECP) is the main non-pharmacological approach accompanying systemic medical treatments in steroid-resistant acute or chronic graft versus host disease. The study aimed to examine the effect of ECP on survival in acute graft versus host disease (aGVHD). METHODS: A total of 35 patients who were followed up in the adult hematology clinic of Inönü University Turgut Özal Medical Center for aGVHD were included in the study. Stem cell transplantation and ECP application parameters that may affect the survival of the patients were examined. RESULTS: In aGVHD using ECP, the degree of involvement affects survival. Involvements with a clinical and laboratory score (Glucksberg system) of 2 and above significantly reduced survival. The duration of ECP use is associated with survival. Especially, 45 days and longer use increases survival (hazard ratio, P-value <.05). The duration of steroid use was found to be effective in survival in aGVHD (P < .001). ECP administration day (P = .003), duration of steroid use (P < .001), duration of ECP use (P = .001), and grade of aGVHD (P < .001) affect survival. CONCLUSION: ECP use is effective in survival in patients with aGVHD score ≥2. In patients with aGVHD, especially the use of 45 days and longer has a positive effect on survival. The duration of steroid use is associated with survival in aGVHD.

The effect of comorbidity on survival and collected CD34 + cell counts in autologous hematopoietic stem cell transplant patients.

OBJECTIVE: In this study, we aimed to report the effectiveness of hematopoietic cell transplantation-specific comorbidity index (HCT-CI) and GATMO scores in predicting overall survival (OS) who underwent autologous stem cell transplantation (ASCT). MATERIAL AND METHODS: The data of 263 MM and 204 lymphoma patients who underwent ASCT in the last 11 years were retrospectively analyzed. RESULTS: Neutrophil engraftment time, thrombocyte engraftment time and collected CD34+ cell counts were similar in MM patients with HCT-CI>2 and HCT-CI≤2 (all p>0.05). Although the estimated median OS of MM patients with HCT-CI ≤2 tended to be higher than those with HCT-CI>2, this difference was not statistically significant (52.8 vs 45 months, p=0.172). No effect of GATMO score on CD34 + count, engraftment times and OS in MM patients was detected (p>0.05). The effect of HCT-CI score on lymphoma patients was examined, it was found that the neutrophil engraftment time was longer (p=0.039) and the number of collected CD34+ cells was lower (p=0.02) in patients with HCT-CI>2 than those with HCT-CI≤2. While the estimated median OS of lymphoma patients with HCT-CI≤2 was 51.5 months, the estimated median OS of patients with HCT-CI>2 was 9.5 months (p=0.012). When lymphoma patients were divided into four groups according to their GATMO scores, the OS of the four groups was found to be different from each other (p<0.001). CONCLUSION: HCT-CI and GATMO scores predict OS in lymphoma patients but not MM patients.

The effect of G-CSF used after allogeneic hematopoietic stem cell transplantation on engraftment times and platelet suspension replacement numbers.

BACKGROUND: With the use of granulocyte colony stimulating factor (G-CSF) after allogeneic hematopoietic stem cell transplantation (HSCT), the duration of neutrophil engraftment and hospitalization were shortened. However, there is no consensus on the effect of G-CSF on platelet engraftment time. The primary aim of our study is to determine the effect of G-CSF use on platelet engraftment time after HSCT. Secondary purposes are to determine the number of platelet suspension, number of erythrocyte suspension and incidence of acute graft versus disease after HSCT. MATERIAL AND METHODS: Patients who had allogeneic stem cell transplantation at our center between 01.01.2011 and 01.01.2022 were retrospectively analyzed. Patients were divided into 2 groups as those who received and did not receive G-CSF after transplantation. RESULTS: A total of 64 patients were included. While 32 patients were given post-HSCT G-CSF support, the other 32 patients were not given. Neutrophil engraftment time and length of hospital stay were shorter in the group receiving G-CSF (p < 0.05). Platelet engraftment time was shorter in the group that did not receive G-CSF (p < 0.05). The incidence of acute GVHD of the patients in group 1 tended to be higher than the patients in group 2 (40.6 % vs 15.6 %, p = 0.052). Post-HSCT platelet suspension was less in the group that did not receive G-CSF, but this difference was not statistically significant (p = 0.173). CONCLUSION: While the positive effect of post HSCT G-CSF use on duration of neutrophil engraftment and hospitalization is evident, its effects on platelet engraftment need to be investigated.

Impact of periodontal status on the oral mucositis in patients receiving high-dose chemotherapy.

OBJECTIVES: Oral mucositis (OM) is a frequent complication of cancer treatments. Oral mucositis and periodontal disease have a common inflammatory pattern. The purpose of this study was to evaluate the OM and its association with periodontal status in patients with hematologic malignancies who undergo high-dose chemotherapy. MATERIALS AND METHODS: Fifty-five patients who received high-dose chemotherapy were included in the study. Full-mouth periodontal clinical measurements including plaque index (PI), gingival index (GI), clinical attachment level (CAL), and probing depth (PD) values were recorded before the condition chemotherapy regime. OM monitoring was initiated 1 day after the chemotherapy and maintained for 20 days. RESULTS: Twenty-two of patients (40%) were observed oral mucositis after high-dose chemotherapy. Patients with mucositis had significantly higher GI scores than those who did not have mucositis (p < 0.05). There was a significantly moderate positive correlation between the grade of mucositis and GI scores (p < 0.05). In patients with periodontitis, the incidence of grade 1-2 mucositis was significantly higher than in the healthy group (p < 0.05). In individuals with periodontitis and gingivitis, the healing duration of mucositis was significantly longer than the healthy group (p < 0.05). CONCLUSIONS: The results of this study showed that the severity grades of oral mucositis may increase in patients with gingival inflammation. The results also suggest that periodontal diseases may have a significant impact on the duration of oral mucositis. CLINICAL RELEVANCE: The current study contributes to our understanding of the importance of oral health status in reducing the occurrence, severity, and duration of OM in hematological cancer patients treated with high-dose chemotherapy.

Filgrastim alone versus cyclophosphamide and filgrastim for mobilization in multiple myeloma patients.

BACKGROUND AND OBJECTIVE: High-dose chemotherapy followed by autologous stem cell transplantation (ASCT) is standard treatment approach in most multiple myeloma (MM) patients. Before ASCT, chemomobilization or only granulocyte-colony stimulating factor (G-CSF) mobilization can be preferred in stem cell mobilization. The primary aim of the study is to compare the effect of the two mobilization regimens on hematopoietic engraftment times, CD34+cell counts and number of apheresis required to harvest stem cells. MATERIALS AND METHODS: The records of MM patients who applied to our hospital between 2010 and 2020 were analysed retrospectively. Patients were divided into two groups (Group A: Cyclophosphamide plus filgrastim, Group B: Filgrastim alone) according to the mobilization regimen. RESULTS: A total of 223 MM patients were included in this study (Group A:153, Group B:70 patients). When the patients in Group A and Group B were compared, the number of collected CD34+ cells were higher in Group A (p < 0.001). However, there was no significant difference between the two groups in terms of median times to neutrophil and platelet engraftment, and number of apheresis required to harvest stem cells (p > 0.05). The rate of infection development during mobilization in the patients in group A and the duration of hospitalization of these patients were higher than the patients in group B (p < 0.001). Patients receiving >6 cycles of chemotherapy and immunomodulatory treatment had lower collected CD34+ cells than other patients (p = 0.012 and p = 0.054). CONCLUSION: Based on our findings, filgrastim alone seems to provide a sufficient amount of stem cells in MM patients.

Lenograstim versus filgrastim in mobilization before autologous hematopoietic stem cell transplantation in patients with multiple myeloma and lymphoma - Single center experience.

OBJECTIVE: Peripheral blood stem cell transplantation is frequently used in the treatment of various hematological malignancies after intensive chemotherapy. The primary aim of our study is to compare the amount of collected CD34+ cells and engraftment times in patients mobilized with filgrastim or lenograstim. MATERIAL AND METHODS: Demographic and clinical data of multiple myeloma (MM) and lymphoma patients who underwent autologous transplantation and mobilized with G-CSF (filgrastim or lenograstim) without chemotherapy were collected retrospectively. RESULTS: One hundred eleven MM and 58 lymphoma patients were included in the study. When mobilization with filgrastim and lenograstim was compared in MM patients, there was no significant difference in neutrophil and thrombocyte engraftment times of lenograstim and filgrastim groups (p = 0.931 p = 0.135, respectively). Similarly, the median number of CD34+ cells collected in patients receiving filgrastim and lenograstim was very similar (4.2 × 106/kg vs 4.3 × 106/kg, p = 0.977). When compared with patients who received lenalidomide before transplantation and patients who did not receive lenalidomide, the CD34+ counts of the two groups were similar. However, neutrophil and platelet engraftment times in the group not receiving lenalidomide tended to be shorter (p = 0.095 and p = 0.12, respectively). When lymphoma patients mobilized with filgrastim and lenograstim were compared, neutrophil engraftment time (p = 0.498), thrombocyte engraftment time (p = 0.184), collected CD34+ cell counts (p = 0.179) and mobilization success (p = 0.161) of the groups mobilized with filgrastim and lenograstim were similar. CONCLUSION: The superiority of the two agents to each other could not be demonstrated. Multi-center prospective studies with larger numbers of patients are needed.

The effect of therapeutic plasma exchange on management of HELLP Syndrome: The report of 47 patients.

BACKGROUND AND OBJECTIVES: HELLP syndrome is a life-threatening condition that may potentially cause complications during pregnancy. If not diagnosed and treated quickly, HELLP syndrome may lead to serious complications both for the mother and the baby. The aim of this study was to determin the effectiveness of therapeutic plasma exchange (TPE) for treatment of Class-I HELLP syndrome. MATERIALS AND METHODS: Laboratory results from 47 patients with Class-I HELLP syndrome patients who underwent TPE between 2011 and 2020 were recorded before and after the procedure. A central venous catheter was inserted, and TPE was performed in patients who had not responded to delivery, steroid, and supportive therapy (blood products, anti-hypertensive therapy, intravenous fluid administration, and antibiotics) within 24 hours after the diagnosis of Class I HELLP syndrome according to the Mississippi Criteria. RESULTS: The average age of patients was 33 ± 4.7 years (range; 21-39 years). A mean of 5 (range; 4 to 6) TPE sessions were performed. There was a statistically significant decrease in total bilirubin, lactic dehydrogenase, aspartate aminotransferase, and alanine aminotransferase levels in all patients, whereas a significant increase in platelet count was observed (p < 0.05). Furthermore, clinical and laboratory improvement was achieved. CONCLUSION: In all patients with HELLP syndrome, a dramatically clinical and laboratory improvement occurred after TPE. Our study suggests that postpartum use of TPE within 24 hours is an efficient treatment option for Class-I HELLP syndrome.

Therapeutic plasma exchange for envenomation: Is it reasonable?

BACKGROUND AND OBJECTIVES: The incidence of poisoning due to snakebite and Crimean Congo Hemorrhagic Fever (CCHF), referred to as 'envenomation', varies according to the region, and many deaths occur every year. Therapeutic plasma exchange (TPE) is a method of extracorporeal blood purification that clears toxins and virus load from the circulation. Therefore, its use has been increasing recently in envenomation cases. However, there are a limited number of studies on poisoning due to snakebite and CCHF. In the present study, we share our TPE experience retrospectively in patients diagnosed with poisoning due to snakebite and CCHF between 2010 and 2019. MATERIALS AND METHODS: A total of 26 patiens, including 20 patients with poisoning due to snakebite and 6 CCHF patients were treated with TPE. Demographic data, clinical status, and outcomes of patients were recorded. Routine biochemical and hematologic laboratory parameters were analyzed before and after TPE. TPE was performed by using centrifugation technology via a central venous catheter. Fresh frozen plasma was used as replacement fluid. RESULTS: An average of 3.95 (1-11) apheresis sessions were applied to patients poisoned due to snakebite, and 19 patients (95 %) were discharged in an average of 8.3 (1-17) days without any complications. None of the patients enrolled in the study lost their limbs. Only one patient died due to disseminated intravascular coagulopathy. Six patients with CCHF who received 5 sessions of TPE on average were discharged successfully after an average of 6.5 days. No adverse events or complications were observed in any patient after TPE. CONCLUSIONS: TPE is a good alternative and a reliable method in treating envenomation cases who are refractory to supportive measures. TPE should be performed without delay in cases of poisoning due to snakebite and CCHF.

Selection of the mobilization regimen in lymphoma patients: A retrospective cohort study.

BACKGROUND AND OBJECTIVES: Consolidation with autologous stem cell transplantation (ASCT) is recommended for patients with recurrent or refractory lymphoma after salvage chemotherapy. Stem cells which will be used in ASCT are provided by mobilization using granulocyte colony stimulation factor (G-CSF) or chemotherapy plus G-CSF. The aim of this study was to compare the effect of various mobilization regimens on the clinical parameters of lymphoma patients. MATERIALS AND METHODS: Mobilization interventions of lymphoma patients were analysed retrospectively. The patients were divided into 3 groups according to the mobilization method implemented to collect stem cells before ASCT, (Group 1: Salvage chemotherapy plus G-CSF, Group 2: Cyclophosphamide plus G-CSF, Group 3: G-CSF alone). RESULTS: Analysis of CD34+ cell counts of the 3 groups revealed a significant difference (p < 0.001). Although the number of CD34+ cells collected were different, the neutrophil and platelet engraftment of the 3 groups were similar (p > 0.05). Furthermore, the results were similar in the separate analysis of NHL and HL patients. While the mobilization success rate in group 1 was 97.8 %, it was 90.2 % in group 3. This difference showed a certain trend towards statistical significance (p = 0.074). Patients who received DHAP plus G-CSF had a higher CD34+ count, while neutrophil engraftment was shorter than with ESHAP plus G-CSF (p < 0.05). CONCLUSION: Although the success rate of mobilization and number of CD34+ cell collected were higher in the salvage chemotherapy plus G-CSF than G-CSF alone, G-CSF alone group provided similar neutrophil and thrombocyte engraftment in most lymphoma patients.

An innovation in stem cell harvesting: Heparin use.

BACKGROUND AND OBJECTIVES: Stem cell transplantation is a growing treatment strategy for most malignant and non- malignant hematological diseases. Plerixafor and granulocyte colony stimulating factor (G-CSF) are usually used in mobilization regimens to increase the CD34+ cell count in the harvest. Heparin is a sulphated glycosaminoglycated polymer with 12-15 kDa mass. Heparin inhibits the CXCR4/SDF1 axis, as does plerixafor. In this study, our aim was to investigate the effect of using heparin on stem cell mobilization and harvesting. MATERIALS AND METHODS: We administered 5000 units of unfractioned heparin intravenously in 150 mL (mL) of isotonic sodium chloride solution, 15 min before the stem cell harvesting procedure to 141 patients who underwent bone marrow transplantation between the years of 2018 and 2019 at our Stem Cell Transplantation Unit. Thirty patients were included as a control group, and they were not given heparin. The study population included patients with multiple myeloma and lymphoma equally in each group. RESULTS: In all patients hematopoeitic stem cells were successfully harvested in a single cycle of apheresis. In multiple myeloma patients who received heparin, the mean collected CD34+ cell number was 8 × 106/kg, and the mean CD34+ cell number yield was 12,555/µl. In the control group, the mean collected CD34+ cell number was 4,2 × 106/kg, and mean CD34+ cell number in yield was 492/µl. In lymphoma patients who received heparin, the mean collected CD34+ cell number was 6,8 × 106/kg, and the mean CD34+ cell number was 1421/µl. In the control group the mean collected CD34+ cell number was 4,3 × 106/kg, and the mean CD34+ cell number was 358/µl. The effect of heparin on the collected stem cell number in both myeloma and lymphoma patients was statistically significant (p < 0.01). CONCLUSIONS: Our results have shown that heparin increases harvested stem cell numbers significantly. Heparin may be a promising agent for stem cell harvesting.

Extracorporeal photopheresis in steroid-refractory chronic graft-versus-host disease: A retrospective multicenter study.

BACKGROUND AND OBJECTIVES: Extracorporeal photopheresis (ECP) is a treatment strategy in steroid-refractory chronic graft-versus-host disease (cGvHD). In this study, we aimed to share our multicenter experience using ECP in our steroid-refractory cGvHD patients. MATERIALS AND METHODS: In this multicenter observational retrospective study with the participation of four Turkish transplant centers, 100 patients with the diagnosis of steroid-refractory cGvHD who underwent ECP were analyzed. All ECP procedures were performed with the off-line system. RESULTS: Severe cGvHD was observed in 77 % of the patients. 50 % of the patients had more than 1 organ involvement. The overall response rate in cGvHD was 58 %, and the complete response (CR) rate was 35 %. The skin was the most involved organ, with a response rate of 61.2 % (CR rate 30.6 %) in cGvHD. At a median 13 months (1-261) follow-up, overall survival (OS) was 41 % (n = 41) and the mortality rate was 59 % (n = 59). Median overall survival (OS) was 2 months for non-responders and 91 months for responders (p < 0.001). Significant OS differences were observed for patients responding to ECP in cGvHD (HR = 4.1, p = 0.001) patients. CONCLUSIONS: ECP is a good therapeutic alternative and could be used earlier in patients with steroid-resistant cGvHD.

Extracorporeal photopheresis in the treatment of acute graft-versus-host disease: A multicenter experience.

BACKGROUND AND OBJECTIVES: Extracorporeal photopheresis (ECP) is one of the second-line treatment strategies in steroid-refractory acute graft-versus-host disease (aGvHD). We aimed to share our multicenter experience using ECP in our steroid-refractory aGvHD patients. MATERIALS AND METHODS: A retrospective observational series of 75 aGvHD patients from 4 transplant centers were analyzed. All ECP procedures were performed with the off-line system. All patients received ECP as second-line therapy. RESULTS: 74.7 % of aGvHD patients were grade 3 or 4. The overall response rate was 42.7 % (32/75) in aGvHD including 17 complete responses (22.7 %). Median follow-up was 6 months (range, 1-68). Median overall survival (OS) was 5 months for non-responders and 68 months for responders (p < 0.001). Twenty-seven (36 %) patients are alive, and 48 (64 %) patients have died. CONCLUSIONS: Early initiated ECP could be an effective treatment alternative in patients with steroid-refractory aGvHD.

A multicenter retrospective analysis on therapeutic plasma exchange in immune thrombocytopenic purpura.

Immune Thrombocytopenia (ITP) is an autoimmune disease characterized by thrombocytopenia and skin and mucosal bleeding. In patients with an indication for treatment, corticosteroids, intravenous immunoglobulin (IVIg) and anti-D are recommended as the first line, while splenectomy, thrombopoietin receptor agonists or rituximab are recommended second line options. Approximately 10 % of adult patients with ITP fall into the chronic refractory ITP group. Therapeutic plasma exchange (TPE) has generally been tested in patients with refractory ITP, who have failed to respond to conventional treatments, in case of bleeding or prior to surgical interventions. It has been stated that elimination of the antibodies that are held responsible in the pathogenesis of the disease has an effective role in the treatment. In this article, we present the results of 17 patients, who underwent TPE for refractory ITP, together with the literature data.

Early therapeutic plasma exchange may improve treatment outcomes in severe acute toxic Hepatitis.

BACKGROUND AND OBJECTIVES: Acute toxic hepatitis can result in a different clinical course from a completely curable disease to subacute hepatitis, chronic hepatitis, and fulminant hepatitis failure, which is quite mortal. For this purpose, therapeutic plasma exchange (TPE) can be used for improving treatment outcomes by reducing the harmful substances caused with and/or without liver function in acute toxic hepatitis. We aimed to evaluate treatment outcomes in severe acute toxic hepatitis patients who applied early TPE procedure. MATERIALS AND METHODS: A total of 335 patients who received TPE between 2010-2021 were retrospectively screened and 59 (male/female, 30/29; min/max-age, 22-84) patients with acute toxic hepatitis who underwent TPE in the first 24 h were included in the study. TPE was performed in patients who had high total bilirubin level (>10 mg/dL). Laboratory parameters of the patients before and after the TPE procedure, number of patients developed complications of acute toxic hepatitis and mortality rates were evaluated for effectiveness of TPE. RESULTS: Acute toxic hepatitis was associated with hepatotoxic drugs in 44 (74.5 %), herbal medication 6 (10.2 %), mushroom poisoning 6 (10.2 %) and with substance abuse 3 (5.1 %) in patients. When the patients were compared based on INR, liver function tests, ammonia, lactate and Model For End-Stage Liver Disease (MELD) score at baseline, 48 h after TPE (independently of TPE number) and before final state a statistically significant decrease was observed in all parameters (p < 0.05). Fifty three (90 %) of patients improved without complications, the remaining 6 (10 %) patients were diagnosed with fulminant hepatitis. All these remaining patients died before liver transplantation (LTx) could be performed. CONCLUSION: TPE is a safe, tolerable therapy option and early TPE may improve treatment outcomes in severe acute toxic hepatitis.

Apheresis in patients with sepsis: A multicenter retrospective study.

BACKGROUND AND OBJECTIVES: To consider the effectiveness of apheresis, which is a supportive treatment method, in sepsis. MATERIALS AND METHODS: A hundred and eleven adults with sepsis or septic shock were included in this retrospective study. The demographic characteristics of the patients, the focus and source of infection causing sepsis or septic shock, characteristics of the pathogen, Acute Physiological and Chronic Health Assessment (APACHE) II score, routine laboratory values, which apheresis method was used, the characteristics of the replacement fluids used during the apheresis procedure, the number of apheresis procedures, complications related to the apheresis procedure, the follow-up time after the procedure, and mortality were recorded. The primary outcome was 28-day mortality. RESULTS: Sixty-nine (62.2 %) of the patients were male. The mean age of the patients was 47.7 ± 18.6 years. The most common source of sepsis was hospital-acquired (79.3 %), the most common pathogen causing sepsis was gram-negative bacteria (41.4 %), and the most common infection site was the respiratory tract (58.7 %). The median APACHE II score was 19 (13-24). 92 (82.9 %) of the patients had septic shock. Theropeutic plasma exchange (TPE) was performed in 11.7 % of the patients and immunoabsorbtion IA in 88.3 %. The median number of sessions was 3 (3-5). No procedure-related fatal complication was observed in the study. While 28-day mortality was 61.3 % in all patients, when the mortality according to the apheresis procedures was examined, it was 11.3 % and 88.2 % in the patients who underwent TPE and IA, respectively. The most common cause of mortality was multiorgan failure. CONCLUSIONS: Apheresis in sepsis can be considered as a salvage treatment. The indication for apheresis in sepsis is still at the level of patient-based individualized decision in line with the studies done so far, including our study. However, there is a need for a multicenter randomized controlled study with a large number of patients in order to give positive or negative recommendations about its effectiveness.

Life-saving effect of convalescent plasma treatment in covid-19 disease: Clinical trial from eastern Anatolia.

AIM: Convalescent Plasma (CP) therapy is of interest as no vaccine or specific treatment is available for emerging viruses such as severe acute respiratory syndrome coronavirus 2 causing Covid-19. It was aimed to report the results of our patients who underwent CP in the treatment of Covid-19. METHODS: CP treatment was applied to 26 Covid-19 patients in intensive care unit who had quantitative reverse transcriptase-polymerase chain reaction positive Sars-Cov-2 infection. Plasma was collected at least 14 days after complete recovery from patients who had mild or moderate infection with Sars-Cov-2 infection. The collected CP (200cc) were applied to severe Covid-19 patients. Laboratory values of patients just before CP and after 7 days were compared. RESULTS: There were no statistically significant differences in leukocyte, neutrophil, lymphocyte, platelet, CRP, ferritin, LDH, ALT, AST, sO2 and total bilirubin values just before and after 1 week of CP. A statistically significant difference was found between age and lymphocyte values of living and dying patients. The patients who died were determined to have older age (74,6 vs 61,85, p = 0,018) and more severe lymphopenia (0,47 vs 1,18, p = 0,001). CONCLUSION: CP therapy has the potential to provide immediate and promising treatment options before specific vaccines and treatments are developed. In early stage Covid-19 patients who do not need mechanical ventilation, CP treatment may be a curative treatment option.

Incidence and risk factors for hepatic sinusoidal obstruction syndrome after allogeneic hematopoietic stem cell transplantation: A retrospective multicenter study of Turkish hematology research and education group (ThREG).

Hepatic sinusoidal obstruction syndrome (HSOS) is a potentially life-threatening complication of allogeneic hematopoietic stem cell transplantation (allo-HSCT). We retrospectively evaluated the incidence, risk factors, treatment and survival for HSOS after allo-HSCT in Turkey. We also reported our experience of defibrotide (DF) for HSOS prophylaxis in high-risk (HR) patients. Across Turkey, 1153 patients from 10 centers were enrolled in the study. We evaluated the medical records of patients who were treated with allo-SCT between January 2012 and December 2015. The study included 1153 patients (687 males/466 females) with median age of 38 (15-71) years. The incidence of HSOS was 7.5 % (n = 86). The incidences of HSOS in the HR/DF+, HR/DF- and standard risk (SR) group were 8%, 66.7 % and 6.2 %, respectively. The rate of HSOS development was not statistically different between HR/DF + and SR group (p = 0.237). HSOS prophylaxis (defibrotide) was significantly decreased HSOS-related mortality (p = 0.004). The incidence of HSOS was found similar to literature in this large Turkish cohort. Defibrotide prophylaxis appears to be associated with low incidence of HSOS development and reduced HSOS-related mortality. Although these results are promising, future studies are needed to support the efficacy of defibrotide prophylaxis in patients with risk of HSOS.

The Turkish experience with therapeutic plasma exchange: A national survey.

Therapeutic plasma exchange (TPE) is used to treat more than 60 diseases worldwide and has drawn growing interest. Little is known about the current situation of TPE activity in Turkey, so we developed a survey to obtain information about this timely topic. We collected data on TPE from 28 apheresis units throughout Turkey. We performed a total of 24,912 TPE procedures with 3203 patients over the past decade. Twenty years ago, the majority of procedures were performed for neurological and hematological disorders, and today, most TPE procedures are done for the same reasons. The only historical change has been an increase in TPE procedures in renal conditions. Currently, renal conditions were more frequently an indication for TPE than rheumatic conditions. Fresh frozen plasma was the most frequently used replacement fluid, followed by 5% albumin, used in 57.9% and 34.6% of procedures, respectively. The most frequently used anticoagulants in TPE were ACD-A and heparin/ACD-A, used with 1671 (52.2%) and 1164 (36.4%) patients, respectively. The frequency of adverse events (AEs) was 12.6%. The most common AEs were hypocalcemia-related symptoms, hypotension, and urticaria. We encountered no severe AEs that led to severe morbidity and mortality. Overall, more than two thirds of the patients showed improvement in the underlying disease. Here, we report on a nationwide survey on TPE activity in Turkey. We conclude that there has been a great increase in apheresis science, and the number of TPE procedures conducted in Turkey has increased steadily over time. Finally, we would like to point out that our past experiences and published international guidelines were the most important tools in gaining expertise regarding TPE.