scholarly journals Reference Values of Human Bone Marrow and Peripheral Blood Levels of 49 Cytokines According to Age and Clonal Hematopoiesis

Blood ◽  
2021 ◽  
Vol 138 (Supplement 1) ◽  
pp. 4296-4296
Author(s):  
Noemie Ravalet ◽  
Hélène Guermouche ◽  
Pierre Hirsch ◽  
Frederic Picou ◽  
Nathalie Gallay ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Inflammatory Cytokines ◽  
Reference Values ◽  
Peripheral Blood ◽  
Plasma Concentrations ◽  
Multiple Comparisons ◽  
Clonal Hematopoiesis ◽  
Age Related ◽  
Biological Studies ◽  
Cytokine Levels

Abstract INTRODUCTION Cytokines are involved in many processes, including hematopoiesis and inflammation. Aging is associated with the onset of clonal hematopoiesis (CH) of indeterminate potential, putatively associated with a higher risk of progression to hematological malignancies such as myelodysplastic syndromes or acute myeloid leukemia. Moreover, CH may participate to create a pro-inflammatory environment contributing to the pathogenesis of age-related diseases, such as cardiovascular diseases. This is likely to be driven by or translated in changes in bone marrow (BM) and/or peripheral blood (PB) soluble factors for which reference values still remain unclear, because BM cytokines levels have never been determined in strictly selected healthy people. Indeed, control BM samples classically used in studies are from subjects undergoing surgeries for non-hematologic causes, such as total hip replacement or cardiac surgery, patients suffering from immune thrombocytopenic purpura, brain death patients or allogeneic BM donors. In this study, the BM and PB plasma concentrations of 49 hematopoietic and inflammatory cytokines were measured in a representative panel of 94 healthy adult volunteers and the results were analyzed considering their age and presence of CH. METHOD Ninety-four healthy donors aged from 18.6 to 80.1 years old (yo), including 58 women were recruited for this study (HEALTHOX protocol, CPP Tours, AFSSAPS identifier ID-RCB: 2016-A00571-50 and ClinicalTrials.gov # NCT02789839). The presence or absence of CH (>1% of variant allele frequency) in this cohort is already known (Guermouche H, Ravalet N et al, Blood Adv 2020;4(15):3550-3557). BM samples were obtained through sternal aspiration using a classical procedure in France, and PB sampling was performed at the same time by venipuncture. Samples were collected on sodium heparin or EDTA, centrifuged twice (1200 g, 10 min, 20 C°), aliquoted and stored at -80°C. A 48-plex human cytokine panel assay was used to quantify 48 human cytokines in PB and BM plasmas [beta-NGF, CCL2, CCL3, CCL4, CCL5, CCL7, CCL11, CCL27, CLEC11A, CXCL1, CXCL8, CXCL9, CXCL10, CXCL12, FGF-2, G-CSF, GM-CSF, HGF, IFN-alpha-2, IFN-gamma, IL-1 alpha, IL-1 beta, IL-1ra, IL-2, IL-2-RA, IL-3, IL-4, IL-5, IL-6, IL-7, IL-9, IL-10, IL-12, IL-12B, IL-13, IL-15, IL-16, IL-17A, IL-18, KITLG, LIF, LT-alpha, M-CSF, MIF, PDGF subunit B, TNF, TNFSF10, VEGF-A]. MIF and FLT3L quantification were performed by ELISA. Regarding CH, the controls were subjects older than 50 yo without CH. Statistical analyses were performed with the R (3.6.3) and Rstudio version 1.2.5042 (www.rstudio.org) software. Comparisons were computed by Wilcoxon and Kruskal-Wallis tests. All pairwise multiple comparisons were performed using Dunn's-test for multiple comparisons of independent samples (PMCMR package). Correlations between cytokine levels in PB and BM were tested with Pearson and Spearman methods. Correlation matrices were plotted using the "corrplot" package. RESULTS CH was detected in 16 volunteers, mostly in individuals over 50 yo. BM and PB plasma samples were studied in 3 age-groups: 18-40, 40-60 and 60-80 yo. With aging, variations were observed for 18 BM cytokine levels, with 7 increasing (FLT3L, CXCL9, HGF, FGF-2, CCL27, IL-16, IL-18) and 8 decreasing (G-CSF, TNF, IL-2, IL-15, IL-17a, IL-4, LT-alpha, IL-1 alpha). In PB, 10 cytokines significantly increased with age (CXCL9, FLT3L, CCL27, CXCL10, HGF, CCL11, IL-16, IL-6, IL-1 beta, CCL2). CH was associated with significantly higher BM levels of MIF and IL-1 beta, lower BM levels of IL-9 and IL-5 and higher PB levels of IL-15, VEGF-A, IL-2, CXCL8, CXCL1 and G-CSF (Table). CONCLUSION In this study and for the first time, we concomitantly analyzed BM and PB concentrations of a panel of hematopoietic and inflammatory cytokines in a cohort of strictly selected healthy volunteers. In addition to the establishment of reference values, useful for various biological studies, and correlations between blood and BM levels, we identify variations in the BM of key cytokines according to age and CH. The differences in these cytokine concentrations, either as causes or as consequences, may shape both the BM microenvironment and hematopoietic processes, eventually leading to the beginning of age-related myeloid malignancies or inflammatory conditions. Figure 1 Figure 1. Disclosures Hirsch: Daiichi Sankyo Oncology: Consultancy; Novartis Pharma: Consultancy. Suner: Sanofi - Genzyme: Consultancy. Delhommeau: Celgene: Consultancy; BMS: Consultancy; Novartis: Consultancy.

scholarly journals Cytokine Consistency Between Bone Marrow and Peripheral Blood in Patients With Philadelphia-Negative Myeloproliferative Neoplasms

2021 ◽  
Vol 8 ◽  
Author(s):  
Pu Chen ◽  
Boting Wu ◽  
Lili Ji ◽  
Yanxia Zhan ◽  
Feng Li ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Inflammatory Cytokines ◽  
Peripheral Blood ◽  
Myeloproliferative Neoplasms ◽  
Critical Role ◽  
Primary Myelofibrosis ◽  
Diagnostic Value ◽  
Inflammatory Status ◽  
Bm Niche ◽  
Cytokine Levels

Background: Inflammation might play a critical role in the pathogenesis and progression of Philadelphia-negative myeloproliferative neoplasms (Ph−MPNs) with elevated inflammatory cytokines in peripheral blood (PB). However, the inflammatory status inside the bone marrow (BM), which is the place of malignancy origin and important microenvironment of neoplasm evolution, has not yet been elucidated.Methods: Inflammatory cytokine profiles in PB and BM of 24 Ph-MPNs patients were measured by a multiplex quantitative inflammation array. Cytokines that correlated between PB and BM were selected and then validated by ELISA in a separate cohort of 52 MPN patients. Furthermore, a panel of cytokines was identified and examined for potential application as non-invasive markers for the diagnosis and prediction of fibrosis progress of MPN subtypes.Results: The levels of G-CSF, I-309, IL-1β, IL-1ra, IL-12p40, IL-15, IL-16, M-CSF, MIG, PDGF-BB, and TIMP-1 in BM supernatants were significantly higher than those in PB (all p < 0.05). Linear correlations between BM and PB levels were found in 13 cytokines, including BLC, Eotaxin-2, I-309, sICAM-1, IL-15, M-CSF, MIP-1α, MIP-1δ, RANTES, TIMP-1, TIMP-2, sTNFRI, and sTNFRII (all R > 0.4 and p < 0.05). Levels of BLC, Eotaxin-2, M-CSF, and TIMP-1 in PB were significantly different from those in health controls (all p < 0.05). In PB, levels of TIMP-1 and Eotaxin-2 in essential thrombocythemia (ET) group were significantly lower than those in groups of prefibrotic primary myelofibrosis (pre-PMF) [TIMP-1: 685.2 (322.2–1,229) ng/ml vs. 1,369 (1,175–1,497) ng/ml, p = 0.0221; Eotaxin-2: 531.4 (317.9–756.6) pg/ml vs. 942.4 (699.3–1,474) pg/ml, p = 0.0393] and primary myelofibrosis (PMF) [TIMP-1: 685.2 (322.2–1229) ng/ml vs. 1,365 (1,115–1,681) ng/ml, p = 0.0043; Eotaxin-2: 531.4 (317.9–756.6) pg/ml vs. 1,010 (818–1,556) pg/ml, p = 0.0030]. The level of TIMP-1 in myelofibrosis (MF) >1 group was significantly higher than that in MF ≤ 1 group.Conclusion: Abnormal inflammatory status is present in MPN, especially in its BM microenvironment. Consistency between PB and BM levels was found in multiple inflammatory cytokines. Circulating cytokine levels of BLC, M-CSF, Eotaxin-2, and TIMP-1 reflected inflammation inside BM niche, suggesting potential diagnostic value for MPN subtypes and prognostic value for fibrosis progression.

scholarly journals Effects of PARP Inhibitor Therapy on p53-Deficient Hematopoietic Stem and Progenitor Cell Fitness

Blood ◽  
2021 ◽  
Vol 138 (Supplement 1) ◽  
pp. 3275-3275
Author(s):  
Jeremy T Baeten ◽  
Irenaeus C.C. Chan ◽  
Daniel C. Link ◽  
Kelly L. Bolton
Keyword(s):  
Bone Marrow ◽  
Peripheral Blood ◽  
Prior Exposure ◽  
Clinical Samples ◽  
Hematopoietic Stem ◽  
Clonal Hematopoiesis ◽  
Fitness Advantage ◽  
Increased Risk ◽  
Bone Marrow Chimeras ◽  
The Impact

Abstract Poly (ADP-ribose) polymerase (PARP) inhibitors are an important new class of anti-cancer therapies. Therapy-related myeloid neoplasia (tMN) has been reported following PARPi therapy and is associated with adverse outcomes. We have previously shown, in retrospective data, that prior chemotherapy increases the incidence of clonal hematopoiesis (CH), especially in DNA damage response (DDR) pathway genes including TP53, PPM1D, and CHEK2 and is associated with progression to tMN. In particular, patients who receive PARPi therapy are more likely to have CH compared to other therapies or untreated patients. In the IMPACT study of CH in 10,156 cancer patients, exposure to PARPi were more likely to have CH (33%) compared to untreated patients (16%). This was particularly pronounced for DDR gene mutations, with 25% of PARPi treated patients with DDR CH compared to 2% of untreated patients. In multivariate analysis accounting for demographics and exposure to other chemotherapy or radiation therapy, exposure to PARPi conferred an increased risk of DDR CH (OR = 3.6, 95% CI 1.5-8.5, p = 0.004). From these data, we hypothesize that mutations in DDR pathway genes provide a fitness advantage to hematopoietic stem/progenitor cells (HSPCs) following PARPi treatment, leading to clonal hematopoiesis. A major limitation, however of our previous work in retrospective clinical samples, is the inability to completely adjust for the confounding effect of prior exposure to cytotoxic therapy (in particular platinum therapies) and germline BRCA1/2 mutations; both which have been shown or hypothesized to increase the risk of tMN. To test whether PARPi exposure might provide a fitness advantage to HSPCs independent of prior exposure to other therapies, we first examined the response of CRISPR-gene edited TP53-/- MOLM13 cells to the PARPi Olaparib and, as a control, Cisplatin. As expected, TP53-/- cells had increased resistance to both agents, though the response was much more pronounced in Cisplatin-treated cells (Figure 1A,B). Next, we implemented a mouse model of TP53-mutant clonal hematopoiesis, by generating mixed bone marrow chimeras transplanted with a 1:9 ratio of wildtype (CD45.1) to TP53 R172H+/- (CD45.2) cells. The "baseline" contribution of TP53 R172H+/- (CD45.2) cells to peripheral blood leukocytes 8 weeks after transplantation was determined by flow cytometry. Mice were then randomized into the following three cohorts: 1) Cisplatin (6mg/kg on days 1, 8, and 15); 2) Olaparib (50mg/kg daily for 3 weeks); and 3) vehicle alone. Peripheral blood chimerism was assessed 3, 9, and 12 weeks after initiating treatment. In addition, the contribution of TP53 R172H+/- to lineage -Sca1 +Kit + (LSK) cells in the bone marrow was determined. Cisplatin treatment resulted in a significant increase in the contribution of TP53 R172H+ to peripheral blood total leukocytes, granulocytes, and bone marrow LSK cells (Figure 1C-E). In contrast, Olaparib treated mice showed no change in CD45 chimerism. From these results we conclude that p53-deficiency does not confer a strong fitness advantage to mouse HSPCs in response to PARPi treatment. This suggests that the strong association observed between prior PARPi therapy, CH and tMN in clinical cohorts may in part be due to the confounding effects of prior (often heavy) exposure to platinum-based therapy. However, the majority of patients receiving PARPi have germline heterozygous BRCA1/2 mutations that could be contributing to their hematopoietic response to PARPi therapy. Experiments are underway to test this possibility by analyzing mixed bone marrow chimeras carrying heterozygous mutations of both Brca1 and Trp53. Figure 1 Figure 1. Disclosures No relevant conflicts of interest to declare.

scholarly journals IL-6 Deficiency Reverses Leukemic Transformation in an MDS Mouse Model

Blood ◽  
2020 ◽  
Vol 136 (Supplement 1) ◽  
pp. 36-36
Author(s):  
Yang Mei ◽  
Yijie Liu ◽  
Xu Han ◽  
Jing Yang ◽  
Peng Ji
Keyword(s):  
Bone Marrow ◽  
Mouse Model ◽  
Inflammatory Cytokines ◽  
Conflicts Of Interest ◽  
Double Knockout ◽  
Leukemic Transformation ◽  
Hematopoietic Stem ◽  
Cell Counts ◽  
Age Related

Myelodysplastic syndromes (MDS) are a group of age-related myeloid malignancies that are characterized by ineffective hematopoiesis and increased incidence of developing acute myeloid leukemia (AML). The mechanisms of MDS to AML transformation are poorly understood, which is partially due to the scarcity of leukemia transformation mouse models. Recently, we established a mDia1/miR146a double knockout (DKO) mouse model mimicking human del(5q) MDS. DKO mice present with pancytopenia with aging due to myeloid suppressive cell (MDSC) expansion and over-secretion of pro-inflammatory cytokines including TNF-a and interlukine-6 (IL-6). In the current study, we found that most of the DKO mice underwent leukemic transformation at 12-14 months of age. The bone marrow of these mice was largely replaced by c-Kit+ blasts in a background of fibrosis. Flow cytometry analysis and in vitro colony formation assay demonstrated that hematopoietic stem progenitor cells (HSPCs) in DKO bone marrow were dramatically declined. The leukemic DKO mice had elevated white blood cell counts and circulating blasts, which contributes to the myeloid cell infiltration in non-hematopoietic organs including liver and lung. Moreover, the splenocytes from DKO old mice efficiently reconstitute the hematopoiesis, but led to a 100% disease occurrence with rapid lethality in gramma irradiated recipient mice, suggesting the leukemic stem cells enriched in DKO spleen were transplantable. Given the significant roles of the inflammatory cytokines in the pathogenesis of the DKO mice, we crossed DKO mice with IL-6 knockout mice and generated mDia1/miR-146a/IL-6 triple knockout (TKO) mice. Strikingly, the TKO mice showed dramatic rescue of the leukemic transformation of the DKO mice in that all the aforementioned leukemic phenotypes were abolished. In addition, IL-6 deficiency normalized the cell comparts and prevented leukemic transplantation ability in TKO spleen. Single cell RNA sequencing analyses indicated that DKO leukemic mice had increased monocytic blast population with upregulation of Fn1, Csf1r, and Lgals1, that was completely diminished with IL-6 knockout. Through a multiplex ELISA, we found IL-6 deficiency attenuated the levels of multiple inflammatory cytokines in TKO serum. In summary, we report a mouse model with MDS leukemic transformation during aging, which could be reverted with the depletion of IL-6. Our data indicate that IL-6 could be a potential target in high risk MDS. Disclosures No relevant conflicts of interest to declare.

Abstract 12445: A Detailed Analysis of Peripheral Blood Cytokines 2-3 weeks After Acute Myocardial Infarction: IL-6-Related Impairment of Bone Marrow Function

Circulation ◽  
2015 ◽  
Vol 132 (suppl_3) ◽  
Author(s):  
Mahan Shahrivari ◽  
Elizabeth Wise ◽  
Doris A Taylor ◽  
Carl J Pepine ◽  
Timothy D Henry ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Bone Marrow ◽  
Cell Therapy ◽  
Cardiac Function ◽  
Peripheral Blood ◽  
Progenitor Cell ◽  
Research Network ◽  
Cytokine Levels ◽  
Cell Phenotypes

Background: Intracoronary infusion of bone marrow (BM) mononuclear cells (BM-MNCs) late after acute myocardial infarction (AMI) has shown no improvement in global or regional left ventricular (LV) function (LateTIME and SWISS-AMI). Studies in experimental AMI models suggest a possible cytokine-related depression of progenitor cell function. Furthermore, BM cell content is correlated with the LV functional response. Accordingly, we hypothesize that inflammatory cytokines associated with the late phase of AMI may impair BM function and alter progenitor cell subsets. Method: Patients with previous AMI (n=87) were recruited in a multicenter cell therapy trial by the Cardiovascular Cell Therapy Research Network (CCTRN LateTIME, NCT00684060). BM and peripheral blood (PB) were collected 2-3 weeks after AMI and examined for cell phenotypes and progenitor capacities as well as PB inflammatory and angiogenic cytokines in a core laboratory. Multiple regression analyses were conducted and correlations between cytokine levels and cell phenotypes, cell functions, and post-MI cardiac function were determined. BM from healthy donors, handled in the same manner, was used as a reference. Result: Of 26 cytokines analyzed, IL-6 showed a negative correlation with ECFC colony maximum in BM (estimate±SE (SEE) -0.13±0.04 P=0.007, multivariableR2: 0.59) and Healthy BM showed decreased ECFC colony outgrowth in the presence of IL-6 (P <0.05), in a dose-dependent manner. PDGF-BB positively correlated with CFU-EC colony maximum in BM (SEE 0.006± 0.002, P=0.023, R2: 0.22), MSC colony maximum in BM (SEE 0.006±0.002, P=0.023, R2: 0.17) and MSC colony maximum in PB (SSE 0.018±0.005, P=0.00005, R2:0.24). No significant correlations were found between cardiac function after AMI and PB cytokine levels. Conclusions: At 2-3 weeks after AMI, PB levels of the angiogenic cytokine, PDGF-BB and the pro-inflammatory cytokine, IL-6, were associated with BM cell phenotype and function. IL-6 has the potential to impair endothelial progenitor cell capacity; inhibiting IL-6 may be a target for improving the regenerative capacity of BM cells after AMI.

scholarly journals Reversing Clonal Hematopoiesis and Associated Atherosclerotic Disease By Targeted Antibody-Drug-Conjugate (ADC) Conditioning and Transplant

Blood ◽  
2020 ◽  
Vol 136 (Supplement 1) ◽  
pp. 34-35
Author(s):  
Karin Gustafsson ◽  
Catherine S Rhee ◽  
Elizabeth W Scadden ◽  
Vanessa Frodermann ◽  
Rahul Palchaudhuri ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Stem Cell ◽  
Stem Cell Transplantation ◽  
Peripheral Blood ◽  
Publicly Traded ◽  
Antibody Drug Conjugate ◽  
Hematopoietic Stem ◽  
Clonal Hematopoiesis ◽  
The Past ◽  
Antibody Drug

Cardiovascular disease (CVD) is the leading cause of death worldwide. Recently, age-related clonal hematopoiesis (CH) has been recognized as a risk factor for CVD of comparable magnitude to smoking, hypertension and hypercholesteremia. While these other risk factors can be mitigated by pharmacological intervention or lifestyle changes, there are no such strategies in place for CH. As CH is initiated by mutations in hematopoietic stem cells (HSCs), a hematopoietic stem cell transplantat (HSCT) could serve as a curative therapy. However, stem cell transplantation is associated with significant toxicity due in part from current conditioning regimens. There is also no evidence that depletion of the disease-driving clones impacts established atherosclerosis. We developed an antibody drug conjugate (ADC) targeting murine CD45. In the context of stem cell transplantation, the CD45-ADC efficiently depletes endogenous HSCs as well as mature leukocytes while enabling rapid engraftment of an infused stem cell graft. In addition, the CD45-ADCs are not based on broad-acting genotoxic agents that lead to long-lasting health risks. We decided to test if CD45-ADC and HSCT could halt atherosclerosis progression through elimination Tet2 knockout HSCs and their disease propagating myeloid progeny. To model CH associated atherosclerosis, LDLR knockout mice were transplanted with 20% CFP labeled wild-type (WT) or Tet2 knockout bone marrow. A single dose of isotype- or CD45-ADC was delivered after 6 weeks of atherosclerosis development and was followed by an infusion of WT CD45.1 bone marrow. As has been reported before, we observed in the isotype-ADC treated animals that Tet2 deficiency leads to a competitive advantage over WT cells. Tet2 knockout cells contributed to peripheral blood chimerism at successively increasing levels and mice harboring the knockout graft showed a significant expansion of their HSC population. Despite their obvious advantage, Tet2 deficient HSC were as efficiently depleted as their WT counterparts upon CD45-ADC and HSCT. Peripheral blood and bone marrow chimerism were similar in WT and Tet2 knockout hosts and the expanded HSC pool was successfully curbed 6 weeks following the intervention. More importantly, CD45-ADC also depleted cells in the atherosclerotic plaques as efficiently as in blood in both WT and Tet2 mutant recipients. This resulted in a significant reduction of myeloid cell infiltration in CD45-ADC conditioned and transplanted knockout hosts and ultimately lead to drastically reduced plaque size in these animals. In conclusion, these data demonstrate that CD45-ADC and HSCT efficiently replaces the disease driving myeloid cells in the atherosclerosis plaques leading to an overall reduction in disease burden. CD45-ADC and transplantation may thus offer a novel therapy for CH and its associated morbidities. Disclosures Palchaudhuri: Magenta Therapeutics: Current Employment. Hyzy:Magenta Therapeutics: Current Employment, Current equity holder in publicly-traded company. Proctor:Magenta Therapeutics: Current Employment. Gillard:Magenta Therapeutics: Current Employment. Boitano:Magenta Therapeutics: Ended employment in the past 24 months, Patents & Royalties. Cooke:Magenta Therapeutics: Ended employment in the past 24 months. Scadden:Magenta Therapeutics: Consultancy, Current equity holder in publicly-traded company, Membership on an entity's Board of Directors or advisory committees.

scholarly journals Dynamic Changes in Inflammatory Cytokines in Pigs Infected with Highly Pathogenic Porcine Reproductive and Respiratory Syndrome Virus

2010 ◽  
Vol 17 (9) ◽  
pp. 1439-1445 ◽  
Author(s):  
Yonggang Liu ◽  
Wenda Shi ◽  
Enmin Zhou ◽  
Shujie Wang ◽  
Shouping Hu ◽  
...  
Keyword(s):  
Immune Responses ◽  
Inflammatory Cytokines ◽  
Peripheral Blood ◽  
Interleukin 1 ◽  
Respiratory Syndrome Virus ◽  
Necrosis Factor Alpha ◽  
Highly Pathogenic ◽  
Cytokine Levels ◽  
Loss Of Appetite ◽  
Highly Pathogenic Prrsv

ABSTRACT Porcine reproductive and respiratory syndrome virus (PRRSV) infection induces both humoral and cellular immune responses. In this study, we investigated the changes in cytokine levels in peripheral blood between the highly pathogenic PRRSV HuN4 strain and its derivative strain HuN4-F112 obtained by serial propagation in MARC145 cells to 112 passages. The results demonstrated that pigs infected with HuN4 showed a loss of appetite, decrease in body weight, raised body temperature, and respiratory symptoms, along with interstitial pneumonia lesions. The PRRSV amounts in the pigs infected with HuN4 were 105 to 109 copies/ml in the blood and 1010 to 1011 copies/g in the lung tissues, whereas the virus amounts with HuN4-F112 were 102.15 to 103.13 copies/ml in the blood and 103.0 to 103.6 copies/g in the lungs. Moreover, the levels of interleukin 1 (IL-1), IL-6, tumor necrosis factor alpha (TNF-α), and alpha interferon (IFN-α) in peripheral blood were upregulated 7 days postinoculation with HuN4, which was earlier than in the HuN4-F112 group. Furthermore, cytokine levels in the pigs infected with HuN4 returned to normal on the 21st day postinoculation, while the levels in those infected with HuN4-F112 continued to increase. These results demonstrated that the pigs infected with the highly pathogenic PRRSV HuN4 strain generated earlier and higher levels of inflammatory cytokines, and the results also indicated that HuN4 may aggravate inflammation and damage tissues and organs. The low-pathogenic PRRSV HuN4-F112 strain induced lower levels of inflammatory cytokines, which may enhance the immune responses against the infection.

scholarly journals IL-10 and ARG-1 Concentrations in Bone Marrow and Peripheral Blood of Metastatic Neuroblastoma Patients Do Not Associate with Clinical Outcome

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Fabio Morandi ◽  
Michela Croce ◽  
Giuliana Cangemi ◽  
Sebastiano Barco ◽  
Valentina Rigo ◽  
...  
Keyword(s):  
Patient Outcome ◽  
Bone Marrow ◽  
Plasma Concentration ◽  
Peripheral Blood ◽  
Patient Survival ◽  
Plasma Concentrations ◽  
Arginase 1 ◽  
History Of ◽  
Tr1 Cells

The expression of the immunosuppressive moleculesIL-10and arginase 1 (ARG-1), and ofFOXP3andCD163, as markers of regulatory T cells (Treg) and macrophages, respectively, was evaluated in bone marrow (BM) and peripheral blood (PB) samples collected at diagnosis from patients with metastatic neuroblastoma (NB). IL-10 and ARG-1 plasma concentrations were measured and the association of each parameter with patients’ outcome was tested. The percentages of immunosuppressive Treg and type-1 regulatory (Tr1) cells were also determined. In both BM and PB samples,IL-10mRNA expression was higher in metastatic NB patients than in controls. IL-10 plasma concentration was higher in patients with NB regardless of stage. NeitherIL-10expression nor IL-10 plasma concentration significantly associated with patient survival. In PB samples from metastatic NB patients,ARG-1andCD163expression was higher than in controls but their expression did not associate with survival. Moreover, ARG-1 plasma concentration was lower than in controls, and no association with patient outcome was found. Finally, in metastatic NB patients, the percentage of circulating Treg was higher than in controls, whereas that of Tr1 cells was lower. In conclusion, although IL-10 concentration and Treg percentage were increased, their contribution to the natural history of metastatic NB appears uncertain.

scholarly journals Inflammatory signals from fatty bone marrow supports the early stages of DNMT3a driven clonal hematopoiesis

2022 ◽  
Author(s):  
Naama Zioni ◽  
Akihad Bercovich ◽  
Noa Chapal-Ilani ◽  
Aryeh Solomon ◽  
Ekaterina Petrovich ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Neutralizing Antibodies ◽  
Fold Increase ◽  
Selective Advantage ◽  
Hematopoietic Stem ◽  
Clonal Hematopoiesis ◽  
Early Stages ◽  
Inflammatory Signals ◽  
Cytokine Analysis ◽  
Age Related

Age related cancer is not only due to the random accumulation of mutations, but also how phenotypes are selected by the aging environment. While fatty bone marrow (FBM), is one of the hallmarks of bone marrow ageing, it is unknown whether FBM can modify the evolution of the early stages of leukemia and clonal hematopoiesis (CH). To address this question, we established FBM mice models and transplanted both human and mice preleukemic hematopoietic stem cells (PreL-HSCs) carrying DNMT3A mutations. We demonstrate that castration which models age related andropenia result in FBM. A significant increase in self-renewal was found when DNMT3AMut-preL-HSPCs were exposed to FBM. To better understand the mechanisms of the FBM-preL-HSPCs interaction, we performed single cell RNA-sequencing on HSPCs three days after FBM exposure. A 20-50 fold increase in DNMT3AMut-preL-HSCs was observed under FBM conditions in comparison to other conditions. PreL-HSPCs exposed to FBM exhibited an activated inflammatory signaling (IL-6 and INFγ). Cytokine analysis of BM fluid demonstrated increased IL-6 levels under FBM conditions. Anti-IL-6 neutralizing antibodies significantly reduced the selective advantage of DNMT3AMut-preL-HSPCs exposed to FBM. Overall, age related paracrine FBM inflammatory signals promote DNMT3A-driven clonal hematopoiesis, which can be inhibited by blocking the IL-6 receptor.

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