BACKGROUND:The incidence rate of peripheral T cel lymphoma is high in Asia, and peripheral T cel lymphoma is aggressive with generaly poor prognosis. However, there is no standard treatment strategy. OBJECTIVE:To retrospectively analyze the therapeutic effect of autologous hematopoietic stem cel transplantation on peripheral T cel lymphoma as wel as relevant toxic and side effects. METHODS:A retrospective review was conducted in 35 patients with peripheral T cel lymphoma who underwent autologous hematopoietic stem cel transplantation from March 2003 to April 2014, including 22 cases of extranodal NK/T-cel lymphoma (nasal type), 1 case of angioimmunoblastic T-cel lymphoma, 8 cases of peripheral T cel lymphoma (non-specific), 3 cases of ALK-positive anaplastic large cel lymphoma, and 1 case of ALK-negative anaplastic large cel lymphoma. Al of 35 patients were classified pathologicaly according to WHO pathological type in 2001 and 2008, and received the high-dose chemotherapy with vincristine, cytarabine, etoposide, mitoxantrone, semustine, cyclophosphamide, and total body irradiation. RESULTS AND CONCLUSION: After a median folow-up of 54 (9-120) months, the probabilities of overal survival and disease-free survival after transplantation were 80% (n=28) and 71% (n=25), respectively. Eight cases (23%) relapsed after transplantation, seven of which died. It was safe with mild and moderate transplantation related side-effects on opportunistic infections, oral cavity mucosa and bladder responses and so on, and there were no severe, life-threatening late complications. Autologous hematopoietic stem cel transplantation may be an effective and safe treatment for peripheral T cel lymphoma, and there is a better benefit in peripheral T cel lymphoma patients with first complete remission.

BACKGROUND:Studies have shown that paeoniflorin functions as replenishing blood and treatment of autoimmune diseases, and bone marrow mesenchymal stem cels also play an important role in the body’s blood and immune function. However, paeoniflorin effects on bone marrow mesenchymal stem cel proliferation and cytokine secretion and expression are rarely reported. OBJECTIVE:To investigate the effect of paeoniflorin on proliferation of bone marrow mesenchymal stem cels and the expression of interleukin-6. METHODS:Human bone marrow mesenchymal stem cels were separated and culturedin vitro by density gradient centrifugation combined with attachment method. The biological characteristics of bone marrow mesenchymal stem cels were identified by flow cytometry and osteogenic/adipogenic induction. The proliferation of bone marrow mesenchymal stem cels under different concentrations of paeoniflorin was detected by MTT method. The mRNA expression and secretion of interleukin-6 in the supernatant of bone marrow mesenchymal stem cels were detected by RT-PCR and ELISA, respectively. RESULTS AND CONCLUSION: Bone marrow mesenchymal stem cels were isolated successfuly and had osteogenic and adipogenic differentiation potential. Compared with the controlgroup, 2 μmol/L and 10 μmol/L paeoniflorin significantly promoted the proliferation of bone marrow mesenchymal stem cels. 10 μmol/L paeoniflorin could significantly decrease the proportion of bone marrow mesenchymal stem cels in G0/G1 phase and increase this proportion in S phase. Compared with the control group, the experimental group could significantly increase the secretion and mRNA expression of interleukin-6 (P < 0.01). It is concluded that paeoniflorin at certain concentrations can obviously promote the proliferation of bone marrow mesenchymal stem cels, and increase the expression and secretion of interleukin-6.

BACKGROUND:Cobalt chloride (CoCl2) may promote the proliferation of human umbilical cord-derived mesenchymal stem cels (hUC-MSCs) in a time- and concentration-dependent manner, and meanwhile, CoCl2 can regulate the expression of genes and proteins in hUC-MSCs. OBJECTIVE:To explore the effects of CoCl2 induced-hypoxia on the proliferation of hUC-MSCs and gene and protein expressions in hUC-MSCs, thereby establishing an effective method for MSCs culture and amplificationin vitro. METHODS: hUC-MSCs were extracted using tissue explant method. Under hypoxia conditions induced by CoCl2 (0, 100, 150, 200, 250 μmol/L) for different periods (0, 1, 2, 3, 4 days), flow cytometry was used to identify cel surface-associated antigens; cel counting kit-8 was used to detect cel proliferation; RT-PCR was used to determine levels of hypoxia inducible factor-1α, inducible nitric oxide synthase, stromal cel-derived factor-1, interleukin-6, transforming growth factor-β mRNA; western blot assay was used to detect protein expression of hypoxia inducible factor-1α. RESULTS AND CONCLUSION:The cels were positive for CD29, CD73, CD90, CD105, while negative for CD31, CD14, CD34, CD45, CD11b, HLA-DR. Moreover, the antigen expression was not affected by CoCl2 induced-hypoxia. CoCl2 induced-chemical hypoxia could promote the proliferation of hUC-MSCs in a time- and concentration-dependent manner. RT-PCR results showed thatunder hypoxia, hypoxia inducible factor 1α, inducible nitric oxide synthase and stromal cel-derived factor-1 mRNA expressions were significantly up-regulated, but interleukin-6 and transforming growth factor-β mRNA expressions were down-regulated significantly (P < 0.05). Additionaly, the protein expression of hypoxia inducible factor 1α was increased under hypoxia conditions. These findings indicate that CoCl2 induced-hypoxia environment may promote the proliferation of hUC-MSCs and the optimal concentration of CoCl2 is 200μmol/L. However, a higher concentration of CoCl2 (≥ 250μmol/L) inhibits the proliferation of hUC-MSCs, and the mechanism may be related to the increase of hypoxia inducible factor-1α at protein and mRNA levels.

OBJECTIVE: To explore the curative effect of nasal type extranodal NK/T-cell lymphoma by sequential chemotherapy combined radiotherapy compared with chemtherapy. METHOD: Fifty-seven cases of nasal type extranodal NK/T-cell lymphoma confirmed by pathological morphology and immuno-histochemistry were divided into chemotherapy combined radiotherapy group (34 cases) or chemotherapy group (23 cases). Twenty-three patients in the chemotherapy group alternately applied CHOP, VDLP and MEOP regimen after each two treatments into the clinical observation; Chemotherapy combined radiotherapy group of 34 patients, in addition to the above chemotherapy, applied three-dimensional conformal radiation therapy of the primary site by linear accelerators. Then all of patients were ceased treatment and followed up 3-5 years. RESULT: (1) After treatment, effective rate of two groups was 91.2% and 87.0%, there was no obvious difference (P > 0.05); After follow up about 1 year, effective rate of two groups was 76.5% and 73.9%, there was no obvious difference (P > 0.05); (3) After follow up about 3 years and 5 years, disease free survival (DFS) of two groups was 61.3%, 47.6% and 43.5%, 21.4%, there was obvious difference (P < 0.05). (4) Long-term survival is closely related to treatment mode. (5) B symptoms, advanced (III, IV) stage, the International Prognostic Index (IPI), KPS scores were correlated with prognosis, and were independent prognostic factors. CONCLUSION Treatment with chemotherapy and radiotherapy for nasal type extranodal NK/T-cell lymphoma had obvious curative effect and may improve long-term survival efficiently compared with chemotherapy alone.
Adult ; Antineoplastic Combined Chemotherapy Protocols ; Combined Modality Therapy ; Female ; Humans ; Lymphoma, Extranodal NK-T-Cell ; drug therapy ; radiotherapy ; therapy ; Male ; Middle Aged ; Radiotherapy ; methods ; Treatment Outcome ; Young Adult

Objective To observe the effects of low dose irradiation (LDR) on proliferation,adipogenesis and osteogenic potential of human umbilical cord mesenchymal stem cells (hucMSCs).Methods hucMSCs were isolated from Wharton's jelly tissue of human umbilical cord by modified tissuepiece inoculation,and flow cytometry was used to detect the expression of specific marker in the hucMSCs.The hucMSCs were randomly divided into two groups:irradiation group undergoing irradiation with the doses 50,100,or 200 mGy respectively,and control group without irradiation.MTT method was applied to evaluate the proliferation of the hucMSCs at different time points with various doses irradiation.The third passage hucMSCs were randomly divided into two groups:irradiation group undergoing low dose irradiation of 200 mGy,and control group without irradiation,and then underwent induction by adipocytic and oesteocytic differentiation induction fluids respectively so as to differentiate into adipocytes and osteoblasts.Oil red O staining was used to detect the activity of alkaline phophatase (ALP),and RT-PCR was used to detect the mRNA expression of core binding factor alpha 1 in human osteoblast.Results After 9-12days,fibroblasts began to swim out of the tissue piece with a confluence rate of 80% 2 weeks later.Within 7 days the absorption values of the hucMSCs undergoing different irradiation doses 2,3,4,5,and 6 days later were all significantly higher than those of the control group(F = 159.17,448.81,265.15,183.93,and 181.83 ,all P <0.01),with the proliferation rates of the 100 mGy subgroup being the highest.After being induced liquid,vacuoles were observed in the irradiated group 2 days later.21 days later,the adipogenic rates of irradiated group was significantly higher than that of the control group (t = 28.25,P <0.01).The ALP activity increased in the irradiated group compared with control group (t=16.87,P <0.01) .The expression level of Cbf-α1 mRNA was up-regulated obviously (t = 14.16,P＜0.01).Conclusions LDR promotes the proliferation of hucMSCs,and accelerates the hucMSCs' differentiation into adipocytes and osteoblasts.

Objective To investigate the curative effect of allogeneic hematopoietic stem cell transplantation (allo-HSCT) and the method of the pretreatment choice on myelodysplastic syndrome (MDS).Methods 13 cases who were undergoing allo-HSCT including 10 HLA-matched, 2 HLA partially matched,and one umbilical cord blood transplanted patients were enrolled in this study. The infusion number of MNC and CD+34 cells is 6.92 (2.65-21.33)×108/kg and 4.47 (1.49-10.22) ×106/kg, respectively. Of the 13 cases,5 adopted TBI, fludarabine(Flud), and cyclophosphamide(Cy) pretreatment, 3 chose BU/Cy pretreatment, and 3 chose TBI and Cy pretreatment, 2 chose Ara-C+BU+Cy+VM26 pretreatment. In order to prevent GVHD, 2cases of HLA partially matched were treated with ATG, cyclosporin A (CsA), MTX and MMF aftertransplantation, while the others were treated with CsA and MTX only. Results 9 out of 13 cases achieved hematopoietic reconstruction completely. 4 died of complications. Conclusion The allogeneic hematopoietic stem cell transplantation is an efficient regimen to cure MDS. The pretreatment should adopt the individuation.

Objective To explore the feasibility and safety of cotransplantation of autologous bone marrow-derived mesenehymal stem cells (MSCs) and peripheral blood stem cells in hematological malignant diseases and to observe its effect on hematopoietic reconstruction after cotransplantation. Methods Adult human MSCs were isolated from the healthy bone marrow of the patient himself with Percoll (1. 073 g/ml) and cultured in Dulbecco's modified Eagle's medium with low glucose containing 10% AB type human serum. After conditioning regimen of high-dose chemotherapy and radiotherapy, cotransplantation of autologous bone marrow-derived MSCs and peripheral blood stem cells was done in five patients with hematological malignant diseases. Results The process of the infusion was safe and there were no adverse reactions or other toxicities related to the infustion of MSCs. The median time to achieve neutrophil counts greater than 0. 5 × 109/L was 9.4 days ( ranging from 8 to 11 days) after cotransplantation and platelet counts greater than 20 × 109/L 12. 2 days (ranging from 10 to 14 days). Conclusion Cotransplantation of autologous bone marrow-derived MSCs and peripheral blood stem cells in hematological malignant diseases is feasible and safe. The rapid hematopoietic reconstruction after cotransplantation shows that MSCs have an effect on hematopeiesis, but the mechanism is still to be investigated.

BACKGROUND: Preliminary study has proven that adult human bone marrow-derived mesenchymal stem cells (MSCs) suppress peripheral blood lymphocytes proliferation.But the mechanism was still to be investigated.OBJECTIVE: To study the negatively regulatory effect of adult human MSCs on allogeneic lymphocyte proliferation by cell-free condition.DESIGN,TIME AND SETTING: Cytological observation in vitro,which was performed in the Lanzhou General Hospital,Lanzhou Military Area Command of Chinese PLA between October 2005 and December 2007.MATERIALS: The bone marrow sample was provided by the allo-transplantation donor.The peripheral blood lymphocytes were provided by the healthy volunteer.METHODS: Adult human MSCs were separated with Percoll + adherence method.Allogeneic peripheral blood lymphocytes were obtained from healthy donors with Ficoll solution and the cell concentration was adjusted as 2×109/L for use.100μ L MSCs culture supernatant was taken out in 96-well plates.The groups were following: A superuatant + 3-day MSCs culture media (100 μ L/well); B superuatant + phytohemagglutini (PHA; 1 g/L,5 μ L); C medium + LG-DMEM culture media containing 10% fetal bovine serum (100 μ L); D medium + PHA (1 g/L,5 μ L).The cells were incubated at 37 ℃ with 5% CO2 in a fully humidified atmosphere for three days.MAIN OUTCOME MEASURES: Effect of MSCs supematant on proliferation and transformation of variant lymphocytes.RESULTS: Peripheral blood lymphocytes proliferation was suppressed as compared with the blank control group and PHA group after MSCs culture,and the inhibition ratio was 9.00% (P ＜ 0.05).When lymphocytes were stimulated by PHA,the suppression effects were even stronger and the inhibition ratio was 20.91% (P ＜ 0.01).CONCLUSION: Adult human MSCs supernatant can suppress peripheral blood lymphocytes proliferation and transformation; furthermore,PHA can enhance the inhibitory effect,suggesting the negative regulation is at least in part due to indirectly inhibiting lymphocytes via soluble cytokines.

Objective To study the immunoregulatory effects of bone marrow mesenchymal stem cells (MSC) on allogeneic peripheral B lymphocytes in vitro. Methods MSCs were isolated and cultured from bone marrow by gradient centrifugation. Mononuclear cells were isolated routinely from peripheral blood, then monocytes were eliminated by L-leucine methy ester method. Remained T lymphocytes were eliminated by AET-SRBC rosette method. The action of MSCs and its supernatant on B lymphocytes proliferation in the presence of anti-human IgM goat antibodies (anti-IgM) was investigated by MTT. The IgG, IgM in the supernatant were detected by ELISA. The percent of apoptosis B lymphocytes, co-cultured with MSCs for 24 or 48h, was assayed by FACS. Results MSCs and its supernatant inhibited B lymphocytes proliferation and Ig secretion. The inhibitory effect depended on the amount of MSCs and condition of its supernatant. The date of FACS indicated that the apoptosis ratio of B lymphocytes, co-cultured with MSCs for different times, were non-significant. The inhibitory effect of MSCs on B lymphocytes was temporary and reversible. Conclusion MSCs have immunoregulatory effects on B lymphocytes, and its mechanisms are complex, not only correlating with the concentration of MSCs but also the action between cells and the secretory cytokine of MSCs.