Publications by authors named "Ji Yong Song"

12 Publications

  • Page 1 of 1

Novel strategy of sirolimus plus thymalfasin and huaier granule on tumor recurrence of hepatocellular carcinoma beyond the UCSF criteria following liver transplantation: A single center experience.

Oncol Lett 2018 Oct 27;16(4):4407-4417. Epub 2018 Jul 27.

Department of Hepatobiliary Surgery, Organ Transplant Institute, Chinese PLA 309th Hospital, Beijing 100091, P.R. China.

Although liver transplantation (LT) lengthens the survival time of patients with hepatocellular carcinoma (HCC), LT patients exhibit a high recurrence rate; particularly those that had advanced HCC associated with the tumor biological characteristics and long-term application of immunosuppressants. A consensus on optimal prophylaxis and treatment for recurrent HCC following LT does not currently exist. The present study retrospectively analyzed data from 36 non-University of California at San Francisco criteria-eligible patients with advanced HCC who underwent LT, and then treated them with sirolimus (SRL)-based therapy with thymalfasin and huaier granules (SRL+, n=18), or with tacrolimus-based therapy (controls; n=18). The SRL+ group had significantly longer recurrence times (P=0.008) and survival times (P<0.0001) (OS, 1-year: 100%, 3-year: 94.4%, 5-year: 77.8%; DFS, 1-year: 88.9%, 3-year: 55.6%, 5-year: 50.0%). Furthermore, compared with pre-LT values and the control group, the SRL+ group had significantly lower serum α-fetoprotein (AFP) levels (both P<0.0001) and percentage of Forkhead box P3 (FoxP3) Treg lymphocytes (P<0.001) during the first year. In the SRL+ group, FoxP3/cluster of differentiation (CD)8 Treg lymphocyte percentages decreased significantly following LT (P<0.001); however, CD8/CD3 T-cells significantly increased (P<0.001). Levels of serum AFP and FoxP3 Treg cells increased when tumors relapsed, and decreased to near-normal when relapse foci were cured or stabilized. SRL+ therapy may decrease AFP and Treg levels, while increasing CD8 T cells, indicating an associated mechanism among them. In conclusion, SRL+ therapy appears to be safe and effective in preventing HCC recurrence following LT with no significant adverse events, and warrants further investigation.
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http://dx.doi.org/10.3892/ol.2018.9226DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6126158PMC
October 2018

Relationship between age at last delivery and age at menopause: The Korea National Health and Nutrition Examination Survey.

Obstet Gynecol Sci 2017 Jul 14;60(4):362-368. Epub 2017 Jul 14.

Department of Obstetrics and Gynecology, Bucheon St. Mary's Hospital, the Catholic University of Korea College of Medicine, Bucheon, Korea.

Objective: We used data from the 2010 to 2012 Korean National Health and Nutrition Examination Surveys to investigate whether the age at menopause is related to age at last delivery.

Methods: This was a cross-sectional study of the data for 714 women who became menopausal within the 3 years preceding the Korean National Health and Nutrition Examination Survey.

Results: Smoking, exercise, drink, educational level, and income were adjusted in model 1, and the mean ages at menopause were 50.5±0.3, 51.2±0.2, 51.2±0.3, and 50.2±0.4 years for women with <25, ≥25 and <30, ≥30 and <35, ≥35 years age at last delivery, respectively (=0.049). Smoking, exercise, drink, educational level, income, age at first delivery, age at last delivery, and gravidity were adjusted in model 2, and the respective mean ages at menopause were 50.5±0.5, 50.7±0.4, 50.3±0.4, and 49.2±0.5 years (=0.03). In both models, older age at last delivery showed higher age at menopause compared with women with younger age at last delivery.

Conclusion: Korean women with older age at last delivery were associated with younger age at menopause. Increased number of pregnancies was related to older age at menopause.
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http://dx.doi.org/10.5468/ogs.2017.60.4.362DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5547084PMC
July 2017

Individualized Immunosuppressive Protocol of Liver Transplant Recipient Should be Made Based on Splenic Function Status.

Chin Med J (Engl) 2016 Jun;129(11):1340-6

Department of Education, Chinese People's Liberation Army Medical School, Beijing 100853, China.

Background: Lymphocyte subsets play important roles in rejection in liver transplant recipients, and the effect of splenic function on these roles remains unknown. The aim of this study was to explore the feasibility to adjust immunosuppressive agents based on splenic function status through detecting the lymphocyte subsets in liver transplantBeijing recipients.

Methods: The lymphocyte subsets of 49 liver transplant recipients were assessed in the 309th Hospital of Chinese People's Liberation Army between June 2014 and August 2015. The patients were divided into splenectomy group (n = 9), normal splenic function group (n = 24), and hypersplenism group (n = 16). The percentages and counts of CD4+ T, CD8+ T, natural killer (NK) cell, B-cell, regulatory B-cell (Breg), and regulatory T-cell (Treg) were detected by flow cytometer. In addition, the immunosuppressive agents, histories of rejection and infection, and postoperative time of the patients were compared among the three groups.

Results: There was no significant difference of clinical characteristics among the three groups. The percentage of CD19+CD24+CD38+ Breg was significantly higher in hypersplenism group than normal splenic function group and splenectomy group (3.29 ± 0.97% vs. 2.12 ± 1.08% and 1.90 ± 0.99%, P = 0.001). The same result was found in CD4+CD25+FoxP3+ Treg percentage (0.97 ± 0.39% vs. 0.54 ± 0.31% and 0.56 ± 0.28%, P = 0.001). The counts of CD8+ T-cell, CD4+ T-cell, and NK cell were significantly lower in hypersplenism group than normal splenic function group (254.25 ± 149.08 vs. 476.96 ± 225.52, P= 0.002; 301.69 ± 154.39 vs. 532.50 ± 194.42, P= 0.000; and 88.56 ± 63.15 vs. 188.33 ± 134.51, P = 0.048). Moreover, the counts of CD4+ T-cell and NK cell were significantly lower in hypersplenism group than splenectomy group (301.69 ± 154.39 vs. 491.89 ± 132.31, P= 0.033; and 88.56 ± 63.15 vs. 226.00 ± 168.85, P = 0.032).

Conclusion: Splenic function status might affect the immunity of liver transplant recipients, that should be considered when we make immunosuppressive protocols.
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http://dx.doi.org/10.4103/0366-6999.182828DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4894046PMC
June 2016

Percutaneous Intraluminal Radiofrequency Ablation for Malignant Extrahepatic Biliary Obstruction: A Safe and Feasible Method.

Dig Dis Sci 2015 Jul 4;60(7):2158-63. Epub 2015 Feb 4.

Hepatobiliary Surgery Department, The 309th Hospital of PLA, Beijing, 100091, China,

Backgroud: The Habib™ EndoHBP catheter is a novel bipolar radiofrequency catheter developed for intraluminal ablation to relieve malignant extrahepatic biliary obstruction. Clinical experience with its use is limited and scattered.

Aim: The purpose of this study was to evaluate the clinical feasibility and safety of this technique.

Methods: A single central retrospective analysis was performed with patients who underwent percutaneous intraluminal radiofrequency ablation (RFA) combined with biliary stenting for treatment of extrahepatic obstructive jaundice between September 2011 and May 2014. A Habib™ EndoHBP catheter was used for RFA. Clinical and telephonic follow-ups were carried out. Procedure-related complications, stent patency, patient survival rate and postoperative biochemical tests were investigated.

Results: All the 47 patients tolerated well a total of 65 RFA procedures with self-expandable metal stents placed. The predominant disease was distal cholangiocarcinoma (16 of 47 cases). No procedure-related hemobilia or infections occurred. The main postablation complication was pain which could be controlled by analgesics. One patient suffered abdominal hemorrhage, diagnosed by blood test and abdominal ultrasonography and cured with conservative therapy. Significantly decreased TBIL and DBIL levels (P < 0.05) were observed on day 7 postoperatively. Stent patency was 149 days (15-281). Median survival was 181 days (15-495) from the time of the first RFA in each patient.

Conclusions: Percutaneous intraluminal RFA combined with biliary stenting is a safe and feasible therapeutic option for unresectable extrahepatic malignant biliary obstruction. Multiple central prospective controlled trials are necessary for the long-term benefits of RFA.
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http://dx.doi.org/10.1007/s10620-015-3547-6DOI Listing
July 2015

New strategies for prevention and treatment of splenic artery steal syndrome after liver transplantation.

World J Gastroenterol 2014 Nov;20(41):15367-73

Ji-Yong Song, Bing-Yi Shi, Zhi-Dong Zhu, De-Hua Zheng, Gang Li, Li-Kui Feng, Lin Zhou, Tian-Tian Wu, Guo-Sheng Du, Organ Transplant Institute, the 309 Hospital of Chinese People's Liberation Army, Beijing 100091, China.

Aim: To explore a prophylactic procedure to prevent splenic artery steal syndrome (SASS), as well as a therapeutic intervention to correct it.

Methods: Forty-three liver transplant patients were enrolled in a non-randomized controlled trial, with the eligible criterion that the diameter of the splenic artery is more than 5 mm and/or 1.5 times of the diameter of the hepatic artery. The procedure of splenic artery banding was performed in 28 of the 43 patients, with the other 15 patients studied as a control group. SASS and other complications were compared between these two groups. A new therapeutic intervention, temporary incomplete blockade of the splenic artery with a balloon, was performed to treat SASS in this study.

Results: The incidence of SASS was decreased by banding the splenic artery (0/28 vs 5/15, P = 0.006), and the same result was observed in total complications associated with prophylactic procedures (2/28 vs 6/15, P = 0.014). Five patients in the control group developed SASS within 5 d after OLT, 2 of whom were treated by coil embolization of the splenic artery, whereas the other 3 by temporary blockade of the splenic artery. Reappeared or better hepatic arteries with improved systolic amplitude and increased diastolic flow were detected by Doppler ultrasonography in all the 5 patients. Local splenic ischemic necrosis and nonanastomotic biliary stricture were diagnosed respectively in one patient treated by coil embolization, and no collateral complication was detected in patients treated by temporary blockade of the splenic artery.

Conclusion: SASS should be avoided during the operation by banding the splenic artery. Temporary blockade of the splenic artery is a new safe and effective intervention for SASS.
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http://dx.doi.org/10.3748/wjg.v20.i41.15367DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4223271PMC
November 2014

Uptake of donor lymphocytes treated with 8-methoxypsoralen and ultraviolet A light by recipient dendritic cells induces CD4+CD25+Foxp3+ regulatory T cells and down-regulates cardiac allograft rejection.

Biochem Biophys Res Commun 2010 May 13;395(4):540-6. Epub 2010 Apr 13.

Organ Transplant Center, Chinese PLA 309th Hospital, No. 17A Hei-Shan-Hu Road, Beijing 100091, China.

Extracorporeal photopheresis (ECP) is an effective immunomodulatory therapy and has been demonstrated to be beneficial for graft-vs-host disease and solid-organ allograft rejection. ECP involves reinfusion of a patient's autologous peripheral blood leukocytes treated ex vivo with 8-methoxypsoralen and UVA light radiation (PUVA). Previous studies focused only on ECP treatment of recipient immune cells. Our study is the first to extend the target of ECP treatment to donor immune cells. The results of in vitro co-culture experiments demonstrate uptake of donor PUVA-treated splenic lymphocytes (PUVA-SPs) by recipient immature dendritic cells (DCs). Phagocytosis of donor PUVA-SPs does not stimulate phenotype maturation of recipient DCs. In the same co-culture system, donor PUVA-SPs enhanced production of interleukin-10 and interferon-gamma by recipient DCs and impaired the subsequent capability of recipient DCs to stimulate recipient naïve T cells. Phagocytosis of donor PUVA-SP (PUVA-SP DCs) by recipient DCs shifted T-cell responses in favor of T helper 2 cells. Infusion of PUVA-SP DCs inhibited cardiac allograft rejection in an antigen-specific manner and induced CD4(+)CD25(high)Foxp3(+) regulatory T cells. In conclusion, PUVA-SP DCs simultaneously deliver the donor antigen and the regulatory signal to the transplant recipient, and thus can be used to develop a novel DC vaccine for negative immune regulation and immune tolerance induction.
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http://dx.doi.org/10.1016/j.bbrc.2010.04.062DOI Listing
May 2010

[Immune regulation effect of rat dendritic cells phagocytosing photochemotherapy-treated allogeneic cells on syngeneic T cells].

Zhongguo Shi Yan Xue Ye Xue Za Zhi 2009 Dec;17(6):1492-6

Chinese PLA Transplant Center, The Second Affiliated Hospital, Chinese PLA General Hospital, Beijing 100091, China.

The aim of this study was to investigate the immune regulatory effect of dendritic cells phagocytosing photochemotherapy-treated allogeneic spleen lymphocytes on syngeneic T cells. DA rat spleen lymphocytes were treated with 8-methoxypsoralen plus UVA irradiation (PUVA). LEW rat bone marrow-derived DCs were co-cultured with PUVA-treated DA spleen lymphocytes (PUVA-SP), and the surface markers (MHC-II, CD86 and CD40) of treated DC were detected by flow cytometry. CFSE-labeled PUVA SP were incubated with LEW DCs and the phagocytosis of DCs on PUVA-SP was observed by using fluorescent microscope. The ability of DC phagocytosing allogeneic PUVA-SP (PUVA-SP DC) to stimulate the proliferation of LEW T cells was analyzed by mixed leukocyte reactions (MLR). The production of IL-4, IL-10, IL-2, IFN-gamma in MLR culture supernatant was determined by luminex method. The results indicated that the PUVA treatment effectively induced early apoptosis of DA rat spleen lymphocytes. After co-culture, DC efficiently phagocytosed allogeneic PUVA-SP and still maintained an immature phenotype with low levels of MHC II, CD40 and CD86. PUVA-SP DC induced LEW T cell hyporesponsiveness to DA rat antigen, and led to skewing of T cell cytokine expression toward Th2 (IL-10 and IL-4). It is concluded that the PUVA-SP DC effectively down-regulate T cell response to alloantigen and induce Th2 immune deviation in vitro.
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December 2009

Overfilling of calcium hydroxide-based paste Calcipex II produced a foreign body granuloma without acute inflammatory reaction.

Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2009 Mar 25;107(3):e73-6. Epub 2009 Jan 25.

Department of Conservative Dentistry, College of Dentistry, Kangnung National University, Gangneung, Korea.

A patient, a 62-year-old man, received endodontic treatment of the lower left canine complicated by apical overfilling of Calcipex II. At the second day after the root canal filling, the 14th day after placement of Calcipex II intracanal medication, he complained of a gingival swelling in the treated area. The incisional biopsy of the gingival swelling revealed a foreign body granuloma infiltrated with macrophages engulfing the fine Calcipex II granules but with polymorphonuclear leukocytes (PMNs). However, the gingival swelling was healed uneventfully, and the tooth was free of symptoms at 4 months' follow-up. This study first reports the Calcipex II-induced reaction in human periodontium. In the immunohistochemistry using antisera of lysozyme, CD31, CD68, interleukin-8 (IL-8), and poly(ADP-ribose) polymerase 1 (PARP-1), the granule-laden cells are positive for lysozyme, CD31, CD68, and PARP-1, but negative for IL-8. Thus, it is presumed that the granule-laden cells belong to the macrophages/monocytes rather than the PMNs, and that they gradually undergo the apoptotic processes. These data suggest that the canal dressing material, Calcipex II, is able to be widely dispersed into the periodontal tissues, primarily engulfed by macrophages, and resulted in the foreign body granuloma in the absence of acute inflammatory reaction.
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http://dx.doi.org/10.1016/j.tripleo.2008.10.019DOI Listing
March 2009

Adaptation of Chinese hamster ovary cells to low culture temperature: cell growth and recombinant protein production.

J Biotechnol 2006 Apr 25;122(4):463-72. Epub 2005 Oct 25.

Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 371-1 Kusong-Dong, Yusong-Gu, Daejon 305-701, Republic of Korea.

Recombinant Chinese hamster ovary (rCHO) cells producing erythropoietin (EPO) and rCHO cells producing follicle-stimulating hormone (FSH) showed a significant increase in specific productivity (q) when grown at 32 degrees C compared to 37 degrees C. However, low culture temperature suppressed cell growth, and therefore, did not increase volumetric productivity as much as q. In an attempt to increase the volumetric productivity through improvement of hypothermic growth, EPO producing rCHO (CHO-EPO) cells and FSH producing rCHO (CHO-FSH) cells were adapted at 32 degrees C in a repeated batch mode using spinner flasks. Cell growth of both CHO-EPO and CHO-FSH gradually improved during adaptation at 32 degrees C. Specific growth rates of CHO-EPO and CHO-FSH cells at 32 degrees C, through adaptation, were increased by 73% and 20%, respectively. During adaptation at 32 degrees C, mRNA levels of cold-inducible RNA-binding protein (CIRP) of both rCHO cell lines did not change significantly, suggesting that CIRP expression may not be the only cause for growth suppression at low culture temperature. Unlike cell growth, the recombinant protein production of both rCHO cell lines was not increased during adaptation due to decreased specific productivities. The specific EPO productivity and specific FSH productivity were decreased by 49% and 22%, respectively. Southern blot analyses showed that the decreased specific productivities were not due to the loss of foreign gene copies. Taken together, improvement of hypothermic cell growth by adaptation does not appear to be applicable for enhanced recombinant protein production, since specific productivity decreases during adaptation to the low culture temperature.
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http://dx.doi.org/10.1016/j.jbiotec.2005.09.010DOI Listing
April 2006

Effect of culture pH on erythropoietin production by Chinese hamster ovary cells grown in suspension at 32.5 and 37.0 degrees C.

Biotechnol Bioeng 2005 Feb;89(3):345-56

Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 371-1 Kusong-Dong, Yusong-Gu, Daejon 305-701, Korea.

To investigate the effect of culture pH in the range of 6.85-7.80 on cell growth and erythropoietin (EPO) production at 32.5 and 37.0 degrees C, serum-free suspension cultures of recombinant CHO cells (rCHO) were performed in a bioreactor with pH control. Lowering culture temperature from 37.0 to 32.5 degrees C suppressed cell growth, but cell viability remained high for a longer culture period. Regardless of culture temperature, the highest specific growth rate (mu) and maximum viable cell concentration were obtained at pH values of 7.00 and 7.20, respectively. Like mu, the specific consumption rates of glucose and glutamine decreased at 32.5 degrees C compared to 37.0 degrees C. In addition, they increased with increasing culture pH. Culture pH at 32.5 degrees C affected specific EPO productivity (q(EPO)) in a different fashion from that at 37 degrees C. At 37 degrees C, the q(EPO) was fairly constant in the pH range of 6.85-7.80, while at 32.5 degrees C, the q(EPO) was significantly influenced by culture pH. The highest q(EPO) was obtained at pH 7.00 and 32.5 degrees C, and its value was approximately 1.5-fold higher than that at pH 7.00 and 37.0 degrees C. The proportion of acidic EPO isoforms, which is a critical factor for high in vivo biological activity of EPO, was highest in the stationary phase of growth, regardless of culture temperature and pH. Although cell viability rapidly decreased in death phase at both 32.5 and 37.0 degrees C, the significant degradation of produced EPO, probably by the action of proteases released from lysed cells, was observed only at 37.0 degrees C. Taken together, through the optimization of culture temperature and pH, a 3-fold increase in maximum EPO concentration and a 1.4-fold increase in volumetric productivity were obtained at pH 7.00 and 32.5 degrees C when compared with those at 37.0 degrees C. These results demonstrate the importance of optimization of culture temperature and pH for enhancing EPO production in serum-free, suspension culture of rCHO cells.
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http://dx.doi.org/10.1002/bit.20353DOI Listing
February 2005

Effect of low culture temperature on specific productivity, transcription level, and heterogeneity of erythropoietin in Chinese hamster ovary cells.

Biotechnol Bioeng 2003 May;82(3):289-98

Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 371-1 Kusong-Dong, Yusong-Gu, Daejon 305-701, Korea.

To determine the effect of low culture temperature on erythropoietin (EPO) production in recombinant Chinese hamster ovary (rCHO) cells, rCHO cells producing EPO (LGE10-9-27) were cultivated at 30, 33, and 37 degrees C. At a culture temperature lower than 37 degrees C cell growth was suppressed, but cell viability remained high for a longer culture period. When the culture temperature was lowered from 37 degrees C to 33 degrees C, more than a 2.5-fold increase in the maximum EPO concentration was achieved. This enhanced EPO production at 33 degrees C was not just because of the extended culture longevity with the decreased release of proteolytic enzymes from dead cells, but mainly because of enhanced q(EPO). The q(EPO) at 33 degrees C was 0.35 +/- 0.08 microg/10(6) cells/h, which was approximately 4-fold higher than that at 37 degrees C. Although the highest q(EPO) of 0.49 +/- 0.14 micro/10(6) cells/h was obtained at 30 degrees C, the maximum EPO concentration was lowest because the detrimental effect of lowering culture temperature on cell growth outweighed its beneficial effect on q(EPO). Like q(EPO), the relative EPO mRNA content increased by lowering culture temperature, indicating that the increased transcription level of EPO was responsible in part for the enhanced q(EPO) at low culture temperature. The quality of EPO produced at 33 degrees C in regard to isoform pattern, sialic acid content, and in vivo biological activity was comparable to or even better than that produced at 37 degrees C. Taken together, the results obtained demonstrate the potential of the application of low culture temperature to the commercial EPO production in rCHO cells.
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http://dx.doi.org/10.1002/bit.10566DOI Listing
May 2003