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Sonic hedgehog signaling pathway in Myelodysplastic Syndrome: Abnormal activation and jervine intervention.

骨髓增生异常综合征中的Sonic hedgehog信号通路: 异常激活和jervine干预。

  • 影响因子:2.60
  • DOI:10.1016/j.gene.2020.144881
  • 作者列表:"Qin Y","Jiang M","Tuerxung N","Wang H","Zhao F","Zhen Y","Hao J
  • 发表时间:2020-09-05
Abstract

OBJECTIVE:This study aims to investigate the roles of Sonic hedgehog (Shh) signaling pathway in the occurrence and progression of Myelodysplastic Syndrome (MDS) and further evaluate using jervine as therapeutic strategy for MDS by inhibiting Shh pathway. METHODS:CD34+ cells from the bone marrow of 53 MDS patients were counted by flow cytometry and isolated by magnetic bead sorting. Shh, Smo, Ptch-1 and Gli-1 (involved in Shh pathway) in CD34+ cells were examined by RT-qPCR. Besides, the relationship between Shh pathway-related genes and the clinical features or prognosis of MDS were analyzed. Further, the effects of jervine on MUTZ-1 cells regarding their proliferation, apoptosis and cell cycle as well as Shh pathway-related gene and protein expression were analyzed. RESULTS:Gene expression level of Shh, Gli-1 and Smo was significantly increased in MDS patients. Herein, Smo and Gli-1 were correlated with chromosome karyotype classification and IPSS. MDS patients with high expression of Smo or Gli-1 had a poor prognosis. Jervine inhibited gene and protein expression of Shh, Smo, Ptch-1 and Gli-1. Besides, jervine suppressed the proliferation and promoted the apoptosis of MUTZ-1 cells, as well as inhibited the transition of cells from G1 to S phase. CONCLUSION:Shh signaling pathway of MDS patients is abnormally activated and participated in the occurrence and progression of MDS. Jervine intervention is a potential therapeutic strategy for MDS.

摘要

目的: 本研究旨在探讨Sonic hedgehog (Shh) 信号通路在骨髓增生异常综合征 (MDS) 发生、发展中的作用,并进一步评价jervine通过抑制Shh通路作为MDS的治疗策略。 方法: 采用流式细胞术对53例MDS患者骨髓CD34 + 细胞进行计数,磁珠分选分离。通过RT-qPCR检测CD34 + 细胞中的Shh、Smo、Ptch-1和Gli-1 (参与Shh途径)。分析Shh通路相关基因与MDS临床特征及预后的关系。此外,分析了jervine对MUTZ-1细胞增殖、凋亡和细胞周期以及Shh途径相关基因和蛋白表达的影响。 结果: MDS患者Shh、Gli-1和Smo基因表达水平明显升高。Smo和Gli-1与染色体核型分类和IPSS相关。高表达Smo或Gli-1的MDS患者预后较差。Jervine抑制Shh、Smo、Ptch-1和Gli-1的基因和蛋白表达。jervine抑制MUTZ-1细胞的增殖,促进其凋亡,抑制细胞从G1期向S期的转变。 结论: MDS患者Shh信号通路异常激活,参与了MDS的发生和进展。Jervine干预是MDS的潜在治疗策略。

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发表时间:2020-01-01
来源期刊:Congenital anomalies
DOI:10.1111/cga.12331
作者列表:["Shahid M","Firasat S","Satti HS","Satti TM","Ghafoor T","Sharif I","Afshan K"]

METHODS::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.

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影响因子:2.36
发表时间:2020-01-01
来源期刊:Platelets
DOI:10.1080/09537104.2019.1581922
作者列表:["Szanto T","Nummi V","Jouppila A","Brinkman HJM","Lassila R"]

METHODS::In type 3 von Willebrand disease (VWD3), the most severe form with absent von Willebrand factor (VWF), the bleeding phenotype is variable. Platelet contribution to the hemostatic defect in VWD3 calls upon further studies. We investigated the contribution of platelets to in vitro thrombin generation (TG) and platelet procoagulant activity in VWD3. TG was assessed by calibrated automated thrombogram (CAT) in platelet-poor (PPP) and -rich plasma (PRP) from 9 patients before and in 6 patients also 30 min after receiving their regular VWF therapy. Responsiveness of PPP to FVIII and protein S was also investigated. TG data were compared with routine laboratory variables, rotational thromboelastometry (ROTEM) and platelet expression of P-selectin and phosphatidylserine in flow cytometry. Compared with healthy controls, TG was markedly decreased in VWD3 PPP (peak thrombin was 16% of normal median), but not in PRP (77% of normal median) (p = 0.002). Six out of nine patients (67%) were high responders in their platelet P-selectin, and 5/9 (56%) in phosphatidylserine expression. Replacement therapy improved TG in PPP, while in PRP TG only modestly increased or was unaffected. In PPP, FVIII levels associated with TG and in vitro FVIII-supplemented TG inclined up to threefold. Conversely, a FVIII inhibitory antibody reduced plasma TG in all, but especially in patients with remnant FVIII levels. Inhibition of protein S improved plasma TG, particularly at low FVIII levels. ROTEM failed to detect VWD3.In VWD3, TG is reduced in PPP and regulated by FVIII and protein S, but TG is close to normal in PRP. VWD3 platelets seem to compensate for the FVIII-associated reduction in TG by their exposure of P-selectin and phosphatidylserine.

影响因子:1.41
发表时间:2020-03-01
DOI:10.1177/1078155219843987
作者列表:["Al-Momani D","Al-Qasem W","Kasht R","Sultan I"]

METHODS:BACKGROUND:The optimal timing of initiating granulocyte-colony stimulating factor following chemotherapy in pediatric patients has not been clearly defined. This study aimed to compare the administration of granulocyte-colony stimulating factor on day 1 versus day 3 postchemotherapy in pediatric patients with Ewing sarcoma. METHOD:A retrospective study of pediatric patients with Ewing sarcoma who received granulocyte-colony stimulating factor following chemotherapy between January 2016 and September 2018 at a comprehensive cancer center. The institution's chemotherapy protocol for Ewing sarcoma was modified in April 2017 to include granulocyte-colony stimulating factor initiation on day 3 instead of day 1 post-chemotherapy. Febrile neutropenia requiring hospitalization, duration of hospital stay, and chemotherapy delay were compared for patients before and after the protocol change. RESULTS:Over the study period, 250 cycles were evaluated with day 1 granulocyte-colony stimulating factor and 221 cycles with day 3 granulocyte-colony stimulating factor. There were no differences between the day 1 and day 3 groups in the number of cycles associated with Febrile neutropenia requiring hospitalization (34 vs. 19, p = 0.086), and the length of Febrile neutropenia-related hospitalization (mean 4 ± 2.1 vs. 4.6 ± 1.8, p = 0.123). However, delay in chemotherapy due to neutropenia was reported in significantly more cycles in the day 1 group, compared to the day 3 group (37 vs. 16, p = 0.01). CONCLUSIONS:Febrile neutropenia resulting in hospital admission and the length of hospital stay was not different between pediatric patients with Ewing sarcoma who received granulocyte-colony stimulating factor on day 1 or day 3 post-chemotherapy. Chemotherapy delay due to neutropenia was higher in patients who received granulocyte-colony stimulating factor on day 1. Larger studies are required to fully determine the impact of delayed initiation of granulocyte-colony stimulating factor.

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