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Ptacin JL, Ma L, Caffaro CE, Acuff NV, Germar K, Severy P, Qu Y, Vela JL, Cai X, San Jose KM, Aerni HR, Chen DB, Esche E, Ismaili TK, Herman R, Pavlova Y, Pena MJ, Nguyen J, Koriazova LK, Shawver LK, Joseph IB, Mooney J, Peakman M, Milla ME. A CD25-biased interleukin-2 for autoimmune therapy engineered via a semi-synthetic organism. Commun Med (Lond) 2024; 4:58. [PMID: 38532017 DOI: 10.1038/s43856-024-00485-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 03/18/2024] [Indexed: 03/28/2024] Open
Abstract
BACKGROUND Natural cytokines are poorly suited as therapeutics for systemic administration due to suboptimal pharmacological and pharmacokinetic (PK) properties. Recombinant human interleukin-2 (rhIL-2) has shown promise for treatment of autoimmune (AI) disorders yet exhibits short systemic half-life and opposing immune responses that negate an appropriate therapeutic index. METHODS A semi-synthetic microbial technology platform was used to engineer a site-specifically pegylated form of rhIL-2 with enhanced PK, specificity for induction of immune-suppressive regulatory CD4 + T cells (Tregs), and reduced stimulation of off-target effector T and NK cells. A library of rhIL-2 molecules was constructed with single site-specific, biorthogonal chemistry-compatible non-canonical amino acids installed near the interface where IL-2 engages its cognate receptor βγ (IL-2Rβγ) signaling complex. Biorthogonal site-specific pegylation and functional screening identified variants that retained engagement of the IL-2Rα chain with attenuated potency at the IL-2Rβγ complex. RESULTS Phenotypic screening in mouse identifies SAR444336 (SAR'336; formerly known as THOR-809), rhIL-2 pegylated at H16, as a potential development candidate that specifically expands peripheral CD4+ Tregs with upregulation of markers that correlate with their suppressive function including FoxP3, ICOS and Helios, yet minimally expands CD8 + T or NK cells. In non-human primate, administration of SAR'336 also induces dose-dependent expansion of Tregs and upregulated suppressive markers without significant expansion of CD8 + T or NK cells. SAR'336 administration reduces inflammation in a delayed-type hypersensitivity mouse model, potently suppressing CD4+ and CD8 + T cell proliferation. CONCLUSION SAR'336 is a specific Treg activator, supporting its further development for the treatment of AI diseases.
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Affiliation(s)
- Jerod L Ptacin
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - Lina Ma
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - Carolina E Caffaro
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - Nicole V Acuff
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | | | - Peter Severy
- Sanofi, 350 Water St., Cambridge, MA, 02141, USA
| | - Yanyan Qu
- Sanofi, 350 Water St., Cambridge, MA, 02141, USA
| | | | - Xinming Cai
- Sanofi, 350 Water St., Cambridge, MA, 02141, USA
| | - Kristine M San Jose
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - Hans R Aerni
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - David B Chen
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - Ean Esche
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - Taylor K Ismaili
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - Rob Herman
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - Yelena Pavlova
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - Michael J Pena
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - Jasmine Nguyen
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - Lilia K Koriazova
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - Laura K Shawver
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - Ingrid B Joseph
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - Jill Mooney
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA
| | - Mark Peakman
- Sanofi, 350 Water St., Cambridge, MA, 02141, USA
| | - Marcos E Milla
- Synthorx, a Sanofi Company, 11099 N. Torrey Pines Rd. Suite 190, La Jolla, CA, 92037, USA.
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Chen DB, Chen P, Chen HS. [Can tumor vaccines really cure liver cancer?]. Zhonghua Gan Zang Bing Za Zhi 2022; 30:918-922. [PMID: 36299183 DOI: 10.3760/cma.j.cn501113-20220706-00370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
In China, the incidence of liver cancer remains high. Approximately 80% of diagnosed patients are in the intermediate and advanced stages, with a high recurrence rate and poor prognosis after surgery. Therefore, substantially reducing the incidence and mortality has always been a major clinical challenge for liver cancer. In recent years, immune checkpoint inhibitor therapy represented by programmed death protein 1 (PD-1) antibody is gradually innovating the traditional paradigm of tumor treatment, but the beneficiary population in liver cancer patients is relatively limited. With the rapid development of high-throughput sequencing, proteomics and immunomics and other fields, the demand for precision medicine continues to increase. Tumor vaccines, especially derived from neoantigens, have shown promising therapeutic effects in malignant solid tumors such as melanoma and non-small cell lung cancer due to their immunogenicity. Combining the latest research reports at home and abroad, this paper emphasis on whether tumor vaccines can effectively treat or even cure liver cancer.
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Affiliation(s)
- D B Chen
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Disease, Beijing 100044, China
| | - P Chen
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Disease, Beijing 100044, China
| | - H S Chen
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Disease, Beijing 100044, China
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Chen SZ, Xu JJ, Xiao TT, Weng YX, Chen DB, Zhang Y, Ren JH, Luo XF, Zheng ZH, Zheng XY, Chen ZZ, Hu JD, Yang T. [Clinical characteristics and prognostic risk factors analysis of carbapenem-resistant organism in the department of hematology]. Zhonghua Xue Ye Xue Za Zhi 2021; 42:563-569. [PMID: 34455743 PMCID: PMC8408494 DOI: 10.3760/cma.j.issn.0253-2727.2021.07.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Indexed: 11/04/2022]
Abstract
Objective: To study the distribution and drug resistance of Carbapenem-Resistant Organism (CRO) and to analysis the risk factors of CRO 30-day mortality. Methods: A total of 181 patients with CRO infection diagnosed in Department of Hematology, Fujian Medical University Union Hospital from January 2018 to June 2020 were retrospectively investigated. The clinical and laboratory data of the patients were collected, the prognosis of patients diagnosed with CRO infection in day 30 was followed up, and the risk factors of prognosis were analyzed. The clinical significance of Carbapenem-Resistant Enterobacteriaceae (CRE) active screening was further evaluated in the CRE subgroup. Results: Among the total of 181 CRO isolates, 47.2% were CRE, 37.0% were Pseudomonas aeruginosa, and 32.6% were Klebsiella pneumoniae, which were highly resistant to carbapenem and had high MIC value, 76.8% (139/181) of CRO were MIC of imipenem resistance≥16 μg/ml. The main sources of isolates were blood and sputum. The 30-day all-cause mortality rates of patients with CRO or CRE infection were (41.4±3.7) % and (44.7±5.4) %, respectively. The COX multivariate regression analysis showed that the level of procalcitonin >0.2 ng/ml and the MIC value of imipenem resistance ≥ 16 μg/ml were independent risk factors for 30-day mortality of CRO infected patients. The CRE subgroup analysis showed that MIC value of imipenem resistance ≥16 μg/ml were independent risk factors for 30-day mortality of CRE infected patients. The 30-day cumulative survival rate of patients with CRE active screening was higher than the patients without CRE active screening [ (68.0±9.3) % vs (50.0±6.5) %, P=0.21]. Conclusion: The high MIC value of imipenem resistance isolates seriously affects the prognosis of patients with CRO infection in the hematology department, and the mortality rate was high. CRE active screening is expected for early prevention, early diagnosis, and early treatment for high-risk patients.
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Affiliation(s)
- S Z Chen
- Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fuzhou 350001, China
| | - J J Xu
- Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fuzhou 350001, China
| | - T T Xiao
- Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fuzhou 350001, China
| | - Y X Weng
- Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fuzhou 350001, China
| | - D B Chen
- Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fuzhou 350001, China
| | - Y Zhang
- Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fuzhou 350001, China
| | - J H Ren
- Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fuzhou 350001, China
| | - X F Luo
- Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fuzhou 350001, China
| | - Z H Zheng
- Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fuzhou 350001, China
| | - X Y Zheng
- Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fuzhou 350001, China
| | - Z Z Chen
- Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fuzhou 350001, China
| | - J D Hu
- Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fuzhou 350001, China
| | - T Yang
- Fujian Medical University Union Hospital, Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fuzhou 350001, China
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Liu XY, Kong FZ, Du JJ, Chen DB. [Metastatic infiltrating lobular carcinoma of breast with cervical tumor as the first manifestation: a case report]. Zhonghua Zhong Liu Za Zhi 2021; 42:981-982. [PMID: 33256315 DOI: 10.3760/cma.j.cn112152-20200531-00503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- X Y Liu
- Department of Pathology, Peking University People's Hospital, Beijing 100044, China
| | - F Z Kong
- Department of Pathology, Peking University People's Hospital, Beijing 100044, China
| | - J J Du
- Department of Pathology, Peking University People's Hospital, Beijing 100044, China
| | - D B Chen
- Department of Pathology, Peking University People's Hospital, Beijing 100044, China
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Chen DB, Zhang H, Kong FZ, Jiang Q, Fang XZ, Shen DH, Kan X. [Clinicopathological features of myeloid sarcoma and DLBCL in the breast: a comparative study]. Zhonghua Bing Li Xue Za Zhi 2020; 49:250-255. [PMID: 32187897 DOI: 10.3760/cma.j.issn.0529-5807.2020.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the clinicopathological features, diagnosis and differential diagnosis of myeloid sarcoma of the breast. Methods: Ten cases of myeloid sarcoma (MS) and 19 cases of diffuse large B cell lymphoma (DLBCL) of the breast were selected from Peking University People's Hospital from February 2005 to September 2019. The cases were evaluated by microscopy and immunohistochemistry basing on WHO classification (2008 and 2017). Results: For the 10 cases of MS, the mean and median age was 33.8 and 31 years (range 23 to 47 years) respectively. All patients presented with breast masses; six presented with B symptoms (6/10); and LDH level was elevated in four patients. The largest tumor dimension was 1.0 to 5.3 cm (mean 2.7 cm). All 10 patients had history of acute myeloid leukemia (AML), and in one patient, the AML occurred after chemotherapy for hydatidiform mole. One case was classified as M0, four were M2, two were M4 and three were M5. For the AML, all patients received chemotherapy and nine were treated by allogeneic hematopoietic stem cell transplant (allo-HSCT) and the breast masses occurred4 months to 2 years post-transplant. Using Ann Arbor staging, five cases were stage Ⅰ, three were stage Ⅱ, and 2 were stage Ⅳ. The MS was found in the left breast (two cases); right breast (three cases) and both breasts (five cases). Lymphocyte in peripheral blood, B symptom and site of lesion had statistical significance between myeloid sarcoma and DLBCL(P<0.05). The tumor cells were primitive, expressing MPO, CD43, CD117, etc. All ten patients had follow-up information, and the median survival period was 14.4 months (range 1 to 50 months). Seven patients died. The prognosis of patients with MS was worse than DLBCL(P=0.002). Conclusions: The clinical history, pathologic morphology, immunophenotyping and molecular studies are very important for diagnosing MS tumors in the breast, and MS may occur after allo-HSCT for AML. Tumor resection, chemotherapy, radiotherapy and donor lymphocyte infusion are recommended for treatment. The prognosis is poor.
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Affiliation(s)
- D B Chen
- Department of Pathology, Peking University People's Hospital, Beijing 100044, China
| | - H Zhang
- Department of Pathology, Xinjiang Medical University Cancer Hospital, Urumqi 830000, China
| | - F Z Kong
- Department of Pathology, Peking University People's Hospital, Beijing 100044, China
| | - Q Jiang
- Department of Hematology, Peking University People's Hospital, Beijing 100044, China
| | - X Z Fang
- Department of Pathology, Xinjiang Medical University Cancer Hospital, Urumqi 830000, China
| | - D H Shen
- Department of Pathology, Peking University People's Hospital, Beijing 100044, China
| | - X Kan
- Department of Pathology, Peking University People's Hospital, Beijing 100044, China
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Zhou XX, Qin HL, He RX, Chen DB, Wu C, Feng L, Li XH, Liang XL. [Clinical characteristics of patients with delayed hepatolenticular degeneration]. Zhonghua Nei Ke Za Zhi 2019; 58:501-507. [PMID: 31269566 DOI: 10.3760/cma.j.issn.0578-1426.2019.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the clinical manifestations, metal metabolism, imaging characteristics and treatment response in patients with delayed Wilson disease (WD). Methods: Patients with untreated WD (40 with delayed onset and 40 with non-delayed onset) were enrolled. Twenty healthy people were included as normal controls. All patients were evaluated with modified Young scale neural symptom scores, grade of Child liver function and mental symptoms rating scale, magnetic resonance imaging (MRI) scan, magnetic sensitive imaging (susceptibility weighted imaging, SWI), metal metabolism. Corrected phase (CP) was measured at SWI. After 2 week treatment, neurologic symptoms, liver function, and metal metabolism were reviewed. Results: The total score of neurological symptoms in WD patients with delayed onset was lower than that of non-delayed onset (13.00±6.87 vs. 21.13±5.53, P=0.033). The scores of SCL-90 and HAMA depression scales in patients with delayed onset were lower than those of non-delayed onset. On T(2) weighted imaging, areas including substantia nigra and thalamus, the caudate nucleus, globus pallidus, putamen presented high signal rate in patients with delated onset than those with non-delayed (P=0.022, 0.037, 0.022, 0.037, 0.029 respectively). The SWI CP values of cangbai sphere and shell nucleus in patients with delayed onset were lower than those with non-delayed onset. Patients with delayed onset had higher urinary copper than those with non-delayed onset before and after treatment (P=0.040, 0.036). After treatment, the score of abnormal tremor and gait in patients with delayed onset was decreased (P=0.037, 0.044), while as the occurrence of neurological symptoms was increased by 10%, and the liver function level in patients with delayed WD was decreased in 3 cases. Conclusions: The brain of WD patients with delayed onset is mainly composed of metal deposits, however the cell damage is not apparent. Clinical symptoms are characterized by significant liver injury, but relatively mild neurological and psychiatric symptoms. Patients with delayed WD have higher urinary copper excretion than those with non-delayed WD. Chelating agents improves the neurological symptoms in patients with delayed onset.
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Affiliation(s)
- X X Zhou
- Department of Neurology, the East Area of the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510700, China
| | - H L Qin
- Department of Imaging, the East Area of the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510700, China
| | - R X He
- Department of Imaging, the East Area of the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510700, China
| | - D B Chen
- Department of Neurology, the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, China
| | - C Wu
- Department of Neurology, the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, China
| | - L Feng
- Department of Neurology, the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, China
| | - X H Li
- Department of Neurology, the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, China
| | - X L Liang
- Department of Neurology, the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, China
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Joseph IB, Ma L, Ptacin JL, Caffaro CE, Aerni HR, Jose KMS, Pena MJ, Herman RW, Pavlova Y, Chen DB, Bragstad K, Li S, Nguyen J, Shawver LK, Koriazova LK, Milla ME. Abstract 3258: THOR-707, a novel not-alpha IL-2, elicits durable pharmacodynamic responses in non-human primates and efficacy as single agent and in combination with anti PD-1 in multiple syngeneic mouse models. Cancer Res 2019. [DOI: 10.1158/1538-7445.am2019-3258] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Aldesleukin is a recombinant form of IL-2 approved for metastatic melanoma and renal cell carcinoma that induced complete, durable remissions in certain patients. Yet, its use is infrequent because of vascular leak syndrome (VLS), a severe dose-limiting adverse event stemming from the engagement of the high affinity IL-2 receptor (IL-2R) alpha chain in type 2 innate lymphoid cells, eosinophils and vascular endothelial cells. THOR-707 is a site-directed, singly pegylated form of IL-2 completely lacking IL-2R alpha chain engagement yet retaining normal binding to the intermediate affinity IL-2R beta-gamma signaling complex expressed by natural killer (NK) and CD8+ T tumor-killing cells. We studied THOR-707 pharmacokinetics (PK) and pharmacodynamics (PD) in non-human primates (NHP) to evaluate peripheral biomarkers of immune cell activation (expansion of NK, CD8+ T and CD4+ regulatory T (Treg) cells and the induction of pSTAT5 and the proliferation marker Ki67). Here we show that in NHP, THOR-707 elicits the expansion of peripheral CD8+ T cells and the persistence of that response with different administration regimes. We also show that in the mouse syngeneic colon tumor model CT-26, THOR-707 induced Ki67 and the expansion of peripheral NK and CD8+ T cells. Within the tumor, THOR-707 promoted an increase in the numbers of infiltrating tumor-killing NK and CD8+ T cells without expansion of suppressive CD4+ Treg cells. Immunohistochemical (IHC) analysis showed that in THOR-707 treated animals, CD8+ T cells were mostly seen around the edges of the tumor and at areas of necrosis. Evaluation of T cell receptor (TCR) clonality revealed that treatment with THOR-707 increased intra-tumoral T cell diversity compared to the untreated animals. THOR-707 induction of CD8+ T cell tumor infiltration resulted in single agent dose-dependent anti-tumor efficacy, and additive efficacy in combination with PD-1 checkpoint inhibitor, increasing the survival of CT-26 tumor-bearing mice over either group alone. The pharmacodynamics, T cell infiltration and clonality, and efficacy of THOR-707 in two additional syngeneic models, have also been studied. Filing of an investigational new drug application for THOR-707 is expected in the second quarter of 2019 and thereafter initiation of a Phase 1/2 clinical trial in multiple tumor types as a single agent and in combination with an immune checkpoint inhibitor.
Citation Format: Ingrid B. Joseph, Lina Ma, Jerod L. Ptacin, Carolina E. Caffaro, Hans R. Aerni, Kristine M. San Jose, Michael J. Pena, Robert W. Herman, Yelena Pavlova, David B. Chen, Ken Bragstad, Shukuan Li, Jasmine Nguyen, Laura K. Shawver, Lilia K. Koriazova, Marcos E. Milla. THOR-707, a novel not-alpha IL-2, elicits durable pharmacodynamic responses in non-human primates and efficacy as single agent and in combination with anti PD-1 in multiple syngeneic mouse models [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2019; 2019 Mar 29-Apr 3; Atlanta, GA. Philadelphia (PA): AACR; Cancer Res 2019;79(13 Suppl):Abstract nr 3258.
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Affiliation(s)
| | - Lina Ma
- Synthorx, Inc., La Jolla, CA
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Chen DB, Zhang H, Zhang YH, Wang Y, Song QJ, Yang SM, Cui H, Zhao Y, Fang XZ, Shen DH. [Analysis of proliferative lesions of haematopoietic and lymphoid tissue in the female productive tract]. Zhonghua Fu Chan Ke Za Zhi 2018; 53:263-269. [PMID: 29747272 DOI: 10.3760/cma.j.issn.0529-567x.2018.04.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the clinicopathologic features, diagnosis and differential diagnosis of tumors of haematopoietic and lymphoid tissue in the female productive tract. Methods: Eleven cases of myeloid sarcoma and leukemia, 9 of non Hodgkin lymphoma (NHL) , 13 of cervical lymphoma-like lesions were selected from Peking University People's Hospital from January 2006 to August 2017. According to WHO classification of tumors of haematopoietic and lymphoid tissues (2008) and updated classification(2016), the cases were studied by microscopy, immunohistochemistry and in situ hybridization. Results: In 20 cases of tumors of haematopoietic and lymphoid tissue, the mean and median age was 48.5 and 56 years old (range: 16-77 years old) . In cases of lymphoma-like lesion of uterine cervix, the mean and median age was 45.9 and 48 years old (range: 23-62 years old) . The patients with neoplasm present as fever, fatigue, hypogastralgia, colporrhagia and mass etc. Eight cases had history of acute myeloid leukemia, and 3 had myeloid leukemia while pregnancy. One case of chronic lymphocytic leukaemia/small lymphocytic lymphoma (CLL/SLL) had history of ovary small cell carcinoma and high grade serous carcinoma resected with chemotherapy. One case of diffuse large B cell lymphoma (DLBCL) had history of renal transplantation. Lactic dehydrogenase (LDH) was elevated in 9 cases (9/18) . The cases of lymphoma-like lesion present as contact bleeding in most cases and all located in cervix. Four cases of neoplasm located in vulva, 1 in vagina, 4 in cervix, 4 in uterine corpus, 8 in ovary and 2 in placenta. Clinical staging of NHL: 4 case was stageⅠ, 1 case of stageⅢ, and 4 cases of stage Ⅳ. Pathological morphology: 9 cases were myeloid sarcoma, 2 cases were placenta invaded by myeloid leukemia. Six cases were DLBCL, and 1 case was CLL/SLL, 1 case was mucosa associated lymphoid tissuse lymphoma (MALToma) , and 1 case was anaplastic large cell lymphoma. Resected mass, chemotherapy was performed in tumors of haematopoietic and lymphoid tissue. Five cases of myeloid sarcoma and 2 of NHL died. In 13 cases of lymphoma-like lesion of uterine cervix, the general condition was good as following up. Conclusions: The clinical history, pathological morphology and immunohistochemistry are very important for diagnosing tumors of haematopoietic and lymphoid tissue in the female productive tract. Resection with chemotherapy is recommended in treatment. The prognosis of lymphoma-like lesion of uterine cervix is good, and should be differentiated from lymphoma.
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Affiliation(s)
- D B Chen
- Department of Pathology, Peking University People's Hospital, Beijing 100044, China
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Chen DB, Shen DH, Zhang H, Wang Y, Song QJ, Yang SM, Fang XZ. [Tumors of lymphoid and hematopoietic tissue of spleen: a clinicopathologic analysis of 53 cases]. Zhonghua Bing Li Xue Za Zhi 2017; 46:775-781. [PMID: 29136691 DOI: 10.3760/cma.j.issn.0529-5807.2017.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the clinicopathologic features, diagnosis and differential diagnosis of the tumors of lymphoidand hematopoietic tissue of the spleen(TLTS). Methods: Fifty-three cases of TLTS were selected from the pathologic files from Peking University People's Hospital from April 2002 to April 2017. According to WHO classification of tumors of hematopoietic and lymphoid tissues (2008) and its updated classification (2016), the cases were studied by microscopy, immunohistochemistry and in situ hybridization, combined with the bone marrow biopsy and clinical examination. Results: In 53 cases of TLTS, the male to female ratio was 3.4∶1.0; the mean age was 55.4 years (range 21-76 years), and all patients presented with variable degree of splenomegaly. Laboratory examination showed increased percentage of lymphocyte in peripheral blood in 22 cases, and elevated serum LDH level in 24 cases. Abnormal blood counts were seen in 26 cases pre-operatively, in which 22 cases showed complete or partial correction of these abnormalities post-operatively (84.6%, 22/26). The clinical symptoms included abdominal pain or distension, fatigue, fever, and weight loss, etc. Seventeen cases presented with lymphadenopathy of abdomen or other sites. Bone marrow biopsy was performed in 30 cases, and 19 cases were involved by tumor (63.3%). Of all 53 cases, 43 were diagnosed as primary splenic lymphoma (PSL), and the remaining 10 cases as secondary TLTS. According to Ann Arbor staging, 14 cases were stages Ⅰ or Ⅱ, 6 were stage Ⅲ and 28 were stage Ⅳ. By histopathologic classification, 43 cases of PSL were splenic B-cell marginal zone lymphoma (SMZL; 48.8%, 21/43), diffuse large B cell lymphoma (DLBCL; 23.3%, 10/43), splenic diffuse red pulp small B-cell lymphoma (11.6%, 5/43), mantle cell lymphoma (9.3%, 4/43), follicular lymphoma (4.7%, 2/43), and composite lymphoma (CL, DLBCL and classical Hodgkin lymphoma; 2.3%, 1/43). The remaining 10 cases were chronic lymphocytic leukaemia/small lymphocytic lymphoma (4 cases), hairy cell leukaemia (1 case), hepatosplenic T-cell lymphoma (HSTL; 5 cases), with lesions in other sites. Of the 53 cases of TLTS, 47 were B cell neoplasm (88.7%, 47/53), and the T cell neoplasms were all HSTL(5 cases, 9.4%, 5/53), 1 case was composite lymphoma. In 11 cases of TLTS, EBER in situ hybridization was performed and all cases were negative. Forty eight cases had follow-up data, and the median survival period was 17.0 months(range: 1-96 months). The survival of patients with SMZL and DLBCL were 25.7 and 18.6 months respectively. Thirteen patients died (27.1%, 13/48). The prognosis of those with elevated LDH level, high clinical stage, B symptoms and older than 60 years of age was worse. And the prognosis of DLBCL was worse than that of SMZL. There was no statistically significant difference between these factors and prognosis (P>0.05). Conclusions: Most TLTS cases present with splenomegaly and abnormal blood counts, and complete or partial remission of blood counts isseen after splenectomy. The most common pathologic types of TLTS are SMZL and DLBCL. Definite diagnosis of TLTS could be made by combining clinical features, histopathology, immunophenotype, genetics, bone marrow biopsy and laboratory examination.
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Affiliation(s)
- D B Chen
- Department of Pathology, Peking University People's Hospital, Beijing 100044, China
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Solayar GN, Chinappa J, Harris IA, Chen DB, Macdessi SJ. A Comparison of Plain Radiography with Computer Tomography in Determining Coronal and Sagittal Alignments following Total Knee Arthroplasty. Malays Orthop J 2017; 11:45-52. [PMID: 29021879 PMCID: PMC5630051 DOI: 10.5704/moj.1707.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Introduction: Optimal coronal and sagittal component positioning is important in achieving a successful outcome following total knee arthroplasty (TKA). Modalities to determine post-operative alignment include plain radiography and computer tomography (CT) imaging. This study aims to determine the accuracy and reliability of plain radiographs in measuring coronal and sagittal alignment following TKA. Materials and Methods: A prospective, consecutive study of 58 patients undergoing TKA was performed comparing alignment data from plain radiographs and CT imaging. Hip-knee-angle (HKA), sagittal femoral angle (SFA) and sagittal tibial angle (STA) measurements were taken by two observers from plain radiographs and compared with CT alignment. Intra- and inter-observer correlation was calculated for each measurement. Results: Intra-observer correlation was excellent for HKA (r>0.89) with a mean difference of <1.9°. The least intra-observer correlation was for SFA (mean r=0.58) with a mean difference of 8°. Inter-observer correlation was better for HKA (r>0.95) and STA (r>0.8) compared to SFA (r=0.5). When comparing modalities (radiographs vs CT), HKA estimations for both observers showed the least maximum and mean differences while SFA observations were the least accurate. Conclusion: Radiographic estimation of HKA showed excellent intra- and inter-observer correlation and corresponds well with CT imaging. However, radiographic estimation of sagittal plane alignment was less reliably measured and correlated less with CT imaging. Plain radiography was found to be inferior to CT for estimation of biplanar prosthetic alignment following TKA.
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Affiliation(s)
- G N Solayar
- Department of Orthopaedics, International Medical University (IMU), Seremban, Malaysia
| | - J Chinappa
- Department of Orthopaedics, Canterbury Hospital, Sydney, Australia
| | - I A Harris
- Ingham Institute for Applied Medical Research, South Western Sydney Clinical School, UNSW Australia, Sydney, Australia
| | - D B Chen
- Sydney Knee Specialists, St George Private Hospital, Sydney, Australia
| | - S J Macdessi
- Sydney Knee Specialists, St George Private Hospital, Sydney, Australia
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Rahman MH, Yu P, Zhang YX, Sun LP, Wu WX, Shen XH, Zhan XD, Chen DB, Cao LY, Cheng SH. Quantitative trait loci mapping of the stigma exertion rate and spikelet number per panicle in rice (Oryza sativa L.). Genet Mol Res 2016; 15:gmr-15-gmr15048432. [PMID: 27813561 DOI: 10.4238/gmr15048432] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The stigma exertion rate is a polygenic inherited trait that is important for increased seed yield in hybrid rice breeding. To identify quantitative trait loci (QTL) associated with high stigma exertion rate, we conducted QTL mapping using 134 recombinant inbred lines derived from XieqingzaoB and Zhonghui9308, which have high and low stigma exertion rates, respectively. A total of eight QTLs (qSES6, qSSE11, qDSE1a, qDSE1b, qDSE10, qDSE11, qTSE1, and qTSE11) for single stigma exertion, double stigma exertion, and total stigma exertion were detected. The locations of qSSE11 and qTSE11 have not been previously reported, and the qDSE11 allele from parent XQZB exhibited a positive additive effect. In addition, three QTLs (qSNP1, qSNP3a, and qSNP3b), for spikelet number per panicle were identified. Of note, one QTL (qSNP1) was detected in two different environments (Hainan and Zhejiang). To evaluate the advantage of exerted stigma for cross-pollination, single, dual, and total stigma exertion should be considered separately for future genetic improvement in the production of rice hybrid seeds. In addition, this study provides information for fine mapping, gene cloning, and marker assisted selection, with emphasis on the latter.
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Affiliation(s)
- M H Rahman
- National Center for Rice Improvement, China National Rice Research Institute, Key Laboratory for Zhejiang Super Rice Research, Hangzhou, Zhejiang, China
| | - P Yu
- National Center for Rice Improvement, China National Rice Research Institute, Key Laboratory for Zhejiang Super Rice Research, Hangzhou, Zhejiang, China
| | - Y X Zhang
- National Center for Rice Improvement, China National Rice Research Institute, Key Laboratory for Zhejiang Super Rice Research, Hangzhou, Zhejiang, China
| | - L P Sun
- National Center for Rice Improvement, China National Rice Research Institute, Key Laboratory for Zhejiang Super Rice Research, Hangzhou, Zhejiang, China
| | - W X Wu
- National Center for Rice Improvement, China National Rice Research Institute, Key Laboratory for Zhejiang Super Rice Research, Hangzhou, Zhejiang, China
| | - X H Shen
- National Center for Rice Improvement, China National Rice Research Institute, Key Laboratory for Zhejiang Super Rice Research, Hangzhou, Zhejiang, China
| | - X D Zhan
- National Center for Rice Improvement, China National Rice Research Institute, Key Laboratory for Zhejiang Super Rice Research, Hangzhou, Zhejiang, China
| | - D B Chen
- National Center for Rice Improvement, China National Rice Research Institute, Key Laboratory for Zhejiang Super Rice Research, Hangzhou, Zhejiang, China
| | - L Y Cao
- National Center for Rice Improvement, China National Rice Research Institute, Key Laboratory for Zhejiang Super Rice Research, Hangzhou, Zhejiang, China
| | - S H Cheng
- National Center for Rice Improvement, China National Rice Research Institute, Key Laboratory for Zhejiang Super Rice Research, Hangzhou, Zhejiang, China
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Goyal N, Chen DB, Harris IA, Rowden N, Kirsh G, MacDessi SJ. Clinical and financial benefits of intra-articular tranexamic acid in total knee arthroplasty. J Orthop Surg (Hong Kong) 2016; 24:3-6. [PMID: 27122503 DOI: 10.1177/230949901602400103] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
PURPOSE To determine whether intra-articular tranexamic acid (TXA) use after total knee arthroplasty (TKA) results in decreased postoperative blood transfusion and length of hospital stay. METHODS Medical records of 1981 patients (mean age, 69.2 years) who underwent primary TKA with (n=1006) or without (n=975) TXA use by any of 4 knee arthroplasty surgeons were reviewed. TXA (3000 mg/30ml) was administered via an epidural catheter into the knee joint after wound closure. Postoperative blood transfusion was given to patients with haemoglobin (Hb) level <80 g/dl on days 1 and 2 or with symptoms of acute anaemia. RESULTS Intra-articular TXA use after TKA resulted in a lower blood transfusion rate (4.5% [45/1006] vs. 14.8% [144/975], p<0.0001), fewer units of blood transfused (86 vs. 313 units, p<0.0001), fewer units of blood transfused per 100 patients (8.5 vs. 32.1, p<0.0001), and shorter length of hospital stay (4.7±2.3 vs. 5.3±2.7 days, p<0.0001). Total cost savings with respect to the reduction in blood transfusion was AU$143.68 per patient. When the change in length of hospital stay and TXA costs were included, the overall saving was AU$631.36 per patient. CONCLUSION Intra-articular TXA use can reduce costs as a result of decreased blood transfusion rate and length of hospital stay in patients undergoing TKA.
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Affiliation(s)
- N Goyal
- Sydney Knee Specialists, Australia
| | - D B Chen
- Sydney Knee Specialists, Australia
| | - I A Harris
- Ingham Institute for Applied Medical Research, South Western Sydney Clinical School, University of New South Wales, Australia
| | - N Rowden
- St George Knee Clinic, Kogarah, NSW, Australia
| | - G Kirsh
- St George Private Hospital, Kogarah, NSW, Australia
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13
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Wernecke GC, Seeto BG, Chen DB, MacDessi SJ. Posterior condylar cartilage thickness and posterior condylar offset of the femur: a magnetic resonance imaging study. J Orthop Surg (Hong Kong) 2016; 24:12-5. [PMID: 27122505 DOI: 10.1177/230949901602400105] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
PURPOSE To measure the femoral posterior condylar cartilage (PCC) thickness and the posterior condylar offset (PCO) and determine the correlation between the 2 parameters in 530 normal subjects using magnetic resonance imaging (MRI). METHODS Records of 287 male and 243 female patients (mean age, 40.7 years) who underwent MRI for traumatic soft tissue knee injuries not involving the femoral PCC and did not have symptomatic knee arthritis were reviewed. RESULTS The PCC thickness was comparable in the lateral and medial sides (2.04 vs. 1.99 mm, p=0.13). Males had thicker PCC in the medial (2.05 vs. 1.92 mm, p=0.0006) and lateral (2.16 vs. 1.86, p<0.0001) sides than females. Age did not correlate with PCC thickness. The bony PCO was larger in the medial than lateral side (25.8 vs. 22.6 mm, p<0.0001). Males had a larger PCO than females in the medial side only (26.1 vs. 25.5 mm, p = 0.0195). The bony PCO did not correlate with PCC thickness. CONCLUSION Femoral PCC thickness was comparable in the medial and lateral sides. Males had thicker PCC in the medial and lateral sides than females.
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Abstract
The aim of this study was to explain the pathogenesis and deterioration process of breast cancer. Breast cancer expression profile data GSE27567 was downloaded from the Gene Expression Omnibus (GEO) database, and breast cancer-related genes were extracted from databases, including Cancer-Resource and Online Mendelian Inheritance In Man (OMIM). Next, h17 transcription factor data were obtained from the University of California, Santa Cruz. Database for Annotation, Visualization, and Integrated Discovery (DAVID)-enrichment analysis was applied and gene-regulatory networks were constructed by double-two-way t-tests in 3 states, including normal, benign, and malignant. Furthermore, network topological properties were compared between 2 states, and breast cancer-related bub genes were ranked according to their different degrees between each of the two states. A total of 2380 breast cancer-related genes and 215 transcription factors were screened by exploring databases; the genes were mainly enriched in their functions, such as cell apoptosis and proliferation, and pathways, such as p53 signaling and apoptosis, which were related with carcinogenesis. In addition, gene-regulatory networks in the 3 conditions were constructed. By comparing their network topological properties, we found that there is a larger transition of differences between malignant and benign breast cancer. Moreover, 8 hub genes (YBX1, ZFP36, YY1, XRCC5, XRCC4, ZFHX3, ZMAT3, and XPC) were identified in the top 10 genes ranked by different degrees. Through comparative analysis of gene-regulation networks, we identified the link between related genes and the pathogenesis of breast cancer. However, further experiments are needed to confirm our results.
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Affiliation(s)
- D B Chen
- Breast Surgery, Zhejiang Cancer Hospital, Hangzhou, Zhejiang Province, China
| | - H J Yang
- Breast Surgery, Zhejiang Cancer Hospital, Hangzhou, Zhejiang Province, China
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Lin XP, Feng L, Xie CG, Chen DB, Pei Z, Liang XL, Xie QY, Li XH, Pan SY. Valproic acid attenuates the suppression of acetyl histone H3 and CREB activity in an inducible cell model of Machado-Joseph disease. Int J Dev Neurosci 2014; 38:17-22. [PMID: 25068645 DOI: 10.1016/j.ijdevneu.2014.07.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2014] [Revised: 07/15/2014] [Accepted: 07/16/2014] [Indexed: 11/26/2022] Open
Abstract
Machado-Joseph disease (MJD) is caused by a (CAG)n trinucleotide repeat expansion that is translated into an abnormally long polyglutamine tract. This disease is considered the most common form of spinocerebellar ataxia (SCA). In the present study, we developed stable inducible cell lines (PC12Tet-On-Ataxin-3-Q28/84) expressing ataxin-3 with either normal or abnormal CAG repeats under doxycycline control. The expression of acetyl histone H3 and the induction of c-Fos in response to cAMP were strongly suppressed in cells expressing the protein with the expanded polyglutamine tract. Treatment with valproic acid, a histone deacetylase inhibitor (HDACi), attenuated mutant ataxin-3-induced cell toxicity and suppression of acetyl histone H3, phosphorylated cAMP-responsive element binding protein (p-CREB) as well as c-Fos expression. These results indicate that VPA can stimulate the up-regulation of gene transcription through hyperacetylation. Thus, VPA might have a therapeutic effect on MJD.
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Affiliation(s)
- X P Lin
- Department of Huiqiao Building, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - L Feng
- Department of Neurological Intensive Care Unit, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - C G Xie
- Department of Neurology, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - D B Chen
- Department of Neurology, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Z Pei
- Department of Neurology, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - X L Liang
- Department of Neurology, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Q Y Xie
- Department of Hyperbaric Oxygen Therapy, Guangzhou General Hospital of Guangzhou Military Area Command of Chinese PLA, Guangzhou, Guangdong Province, China
| | - X H Li
- Department of Neurology, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China.
| | - S Y Pan
- Department of Neurology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
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Fan TY, Wei SL, Yan WW, Chen DB, Li J. An investigation of pulsatile release tablets with ethylcellulose and Eudragit L as film coating materials and cross-linked polyvinylpyrrolidone in the core tablets. J Control Release 2001; 77:245-51. [PMID: 11733092 DOI: 10.1016/s0168-3659(01)00508-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
To develop new pulsatile release tablets, which can suppress drug release in stomach and release the drug rapidly after a predetermined lag time of about 3 h in intestine, the use of tablets with ethylcellulose/Eudragit L as a coating film and cross-linked polyvinylpyrrolidone in the core tablets was investigated. The release of diltiazem hydrochloride (DIL) as a model drug in the core tablets was investigated in vitro. The lag time (t10) was prolonged with an increase of the coating level, whereas the drug release rate was almost constant, irrespective of the coating level. The water-uptake study and electron microscope photographs suggested the mechanism of pulsatile release of drug. Pulsatile release tablets containing 60 mg DIL with 4.4 h of lag time (t10) in vitro were administrated to eight volunteers. The mean plasma concentration curves showed 4.9 h of lag time (tlag), 8.0 h of time to maximum concentration (tmax) and 3.1 h of time between tmax and tlag (t(psi)) in vivo. Relative bioavailability was 1.05 for pulsatile release tablets compared to conventional tablets.
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Affiliation(s)
- T Y Fan
- Department of Pharmacy, Peking University School of Pharmaceutical Sciences, 100083, Beijing, China
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Chen DB, Yang TZ, Lu WL, Zhang Q. In vitro and in vivo study of two types of long-circulating solid lipid nanoparticles containing paclitaxel. Chem Pharm Bull (Tokyo) 2001; 49:1444-7. [PMID: 11724235 DOI: 10.1248/cpb.49.1444] [Citation(s) in RCA: 169] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Paclitaxel (Taxol), a diterpenoid isolated from Taxus brevifolia, is effective against several murine tumors, and is one of the most exciting anticancer molecules currently available. Due to its low solubility in water, it is clinically administered with polyethoxylated castor oil (Cremophor EL), which causes serious side effects. Inclusion of paclitaxel in solid lipid nanoparticles (SLNs) has proved to be a good approach to eliminate the need for Cremophor EL and improve the drug's antitumor efficacy. This paper describes the development of two types of long-circulating SLNs as colloidal carriers for paclitaxel. SLNs are constituted mainly of bioacceptable and biodegradable lipids. In vitro release kinetics showed that the release was very slow, the release of paclitaxel from F68-SLN is linear, and the release of paclitaxel from Brij78-SLN followed the Weibull equation. Pharmacokinetics was evaluated in KM mice after injection of paclitaxel formulated in Cremophor EL or in Brij78-SLN and F68-SLN. Encapsulation of paclitaxel in both SLNs produced marked differences compared with the free drug pharmacokinetics. F68-SLN and Brij78-SLN are long-circulating (t 1/2 beta, 10.06 and 4.88 h, respectively) compared with paclitaxel injection (t 1/2 beta, 1.36 h).
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Affiliation(s)
- D B Chen
- Department of Pharmaceutics, Peking University School of Pharmaceutical Sciences, Beijing, PR China
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Chen DB, Yee DC. Flexor digitorum profundus tendon avulsion through a recurrent enchondroma--a case report. Hand Surg 2001; 6:125-6. [PMID: 11677676 DOI: 10.1142/s0218810401000485] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2000] [Accepted: 06/05/2000] [Indexed: 11/18/2022]
Abstract
Flexor digitorum profundus (FDP) tendon avulsion from the distal phalanx is a well recognised injury, which usually follows a hyperextension force to a flexed distal interphalangeal (DIP) joint. It is commonly seen in contact sport athletes, with a predilection for the ring finger.(2,4) Avulsion of the FDP tendon from pathological bone is an infrequent occurrence. It has, however, been reported to occur in association with an enchondroma of the distal phalanx.(2,3) To our knowledge, an FDP tendon avulsion through a recurrent enchondroma has not been reported. We present the case findings of such an event.
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Abstract
Apoptosis of cardiac muscle cells may contribute to the development of cardiomyopathy and heart failure. Alcohol (ethanol) abuse is a major cause of cardiomyopathy, but its underlying mechanism remains unknown. To determine whether ethanol causes apoptosis in cardiac muscle and whether insulin-like growth factor I (IGF 1) improves cardiac muscle survival upon ethanol exposure, we have defined the effects of ethanol and IGF I in primary cardiomyocytes. Ethanol decreased cell viability in dose-response manner from 0.2% to 1%. In contrast, ethanol (0.2-1%) did not alter viability of cardiac fibroblasts. To assess the occurrence of apoptosis, DNA fragmentation was determined with quantitation of nucleosomes. Nucleosomes were increased in ethanol-treated cells, thus confirming the apoptotic effects of ethanol. The pro-apoptotic Bax protein and Caspase 3 are important proteins of apoptotic signaling. The content of Bax and the activities of Caspase 3 were increased upon ethanol exposure. IGF I partially suppressed Bax induction, Caspase 3 activation, DNA fragmentation, and increased cardiomyocyte survival. The effects of IGF I on ethanol-induced apoptosis can be inhibited with a chemical inhibitor of PI 3 Kinase (LY-294002), suggesting that anti-apoptotic actions of IGF I involves PI 3 Kinase. These results may have important implications on further understanding the pathogenesis of alcoholic heart disease and the development of new strategies to treat alcoholic cardiomyopathy.
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Chen DB, Westfall SD, Fong HW, Roberson MS, Davis JS. Prostaglandin F2alpha stimulates the Raf/MEK1/mitogen-activated protein kinase signaling cascade in bovine luteal cells. Endocrinology 1998; 139:3876-85. [PMID: 9724043 DOI: 10.1210/endo.139.9.6197] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Upon binding to its G protein-coupled transmembrane receptors, the actions of PGF2alpha on the corpus luteum are initiated by the phospholipase C/diacylglycerol-inositol 1,4,5-trisphosphate (InsP3)/Ca2+-protein kinase C (PKC) pathway. However, little is known about the downstream intracellular signaling events that can lead to transcriptional activation in response to PGF2alpha. The present study was conducted to examine the involvement of the mitogen-activated protein kinase (MAPK) signaling cascade in the corpus luteum. Three isoforms of the Raf family of oncoprotein kinases (A-Raf, B-Raf, and Raf-1 or c-Raf) were detected in bovine luteal cells. Raf-1 and B-Raf, but not A-Raf, were activated by PGF2alpha (1 microM) and the pharmacological PKC activator phorbol myristate acetate (PMA, 20 nM). Kinetic analysis revealed that PGF2alpha rapidly and transiently activated Raf-1. In vitro protein kinase assays demonstrated that activation of Raf-1 and B-Raf resulted in the phosphorylation and activation of MAPK kinase (MEK1), which subsequently phosphorylated p42mapk. As determined by hyperphosphorylation, tyrosine phosphorylation, and enzymatic activity, p42mapk and p44mapk were rapidly and transiently activated by both PGF2alpha (1 microM) and PMA (20 nM). Additionally, both PGF2alpha (1 microM) and PMA (20 nM) stimulated phosphorylation of Raf-1, MEK1, and p42mapk in 32P-labeled cells. Our data demonstrate that PGF2alpha activates the Raf/MEK1/p42/44mapk signaling cascade in bovine luteal cells and that the actions of PGF2alpha are mimicked by the PKC activator PMA. Activation of the Raf/MEK1/MAPK signaling cascade by PGF2alpha in luteal cells provides a mechanism to transduce signals initiated by PGF2alpha receptors on the cell surface into the nucleus. Activation of the Raf/MEK1/MAPK signaling cascade may be associated with transcriptional activation of luteal genes possessing activator protein-1-binding sites.
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Affiliation(s)
- D B Chen
- The Women's Research Institute, Department of Obstetrics and Gynecology, University of Kansas School of Medicine-Wichita, 67214, USA
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Lang PZ, Wang Y, Chen DB, Wang N, Zhao XM, Ding YZ. Bioconcentration, elimination and metabolism of 2,4-dinitrotoluene in carps(Cyprinus Carpio L.). Chemosphere 1997; 35:1799-1815. [PMID: 9353907 DOI: 10.1016/s0045-6535(97)00258-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Bioconcentration curves of 2,4-dinitrotoluene(2,4-DNT) in carps (whole fish, liver, intestine and muscle) were investigated using semistatic system. For whole fish, its curve could be described as a gentle peak which began with a rise in concentration to summit or steady state, then declined and reached lower level followed by another steady state. For liver and intestine, their curves both contained two successive peaks, with the second peak followed by slight fluctuation. Bioconcentration factors of 2,4-DNT in whole fish during the first and second steady state were 9.15 and 4.15,(97.86 and 44.39, based on lipid content), respectively. By logarithmic plotting, two straight-lines with different slopes(3.6 and 0.1 d-1) were measured for elimination. According to peaky curves of 2,4-DNT in whole fish, liver and intestine, smaller BCFs than calculated BCFs based on the regression equations for inert chemicals, and large rate constants of elimination, biotransformation was inferred to have happened in tissues such as liver, intestine, and other tissues. Two metabolites were separated from liver and identified as 4-amino-2-nitrotoluene(4A2NT) and 2,4-diamino-toluene(2,4-DAT) on HPLC, their retention times were 23.1 and 8.8 min, respectively. In bioconcentration test of 2,4-DNT in liver, two metabolites and parent were determined at the same time at intervals, higher concentrations of 4A2NT and 2,4-DAT were found when level of 2,4-DNT declined. Such results demonstrated our inference that metabolism caused the declines in bioconcentration curves. A one-compartment model was set up to simulate the bioconcentration, in which biotransformation adhered to Delayed Enzyme-Catalytic Logarithmic Kinetics. Good fit of model curves with measured values could be observed.
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Affiliation(s)
- P Z Lang
- Department of Environmental Science, Northeast Normal University, Changchun, P.R. China
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Abstract
Leukemia inhibitory factor (LIF) has been shown to be essential for the implantation of mouse blastocysts. The present study was designed to determine how LIF protein was hormonally regulated in rabbit and mouse uterus using immunohistochemistry. In unmated rabbits, LIF protein was at a low level in the uterine epithelium and glands, and up-regulated by progesterone alone or estradiol-17 beta and progesterone combined. Estradiol-17 beta alone had no apparent effect. In ovariectomized mice, the level of LIF protein was very low in the uterine epithelium and glands, and was up-regulated by estradiol-17 beta alone or estradiol-17 beta and progesterone combined. Progesterone alone had no apparent effect. These results suggest that LIF protein is differentially regulated in rabbit and mouse uterus by progesterone and estrogen, respectively. This would explain the high level of LIF protein observed in uterine epithelium and glands prior to blastocyst implantation in the two species with different hormonal requirements for implantation.
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Affiliation(s)
- Z M Yang
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas, USA
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23
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Yang ZM, Chen DB, Le SP, Brown RW, Chuong CJ, Harper MJ. Localization of leukemia inhibitory factor in human endometrium during the menstrual cycle. Early Pregnancy 1996; 2:18-22. [PMID: 9363198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Leukemia inhibitory factor (LIF) has been shown to be imperative for the implantation of mouse blastocysts. The objective of this study was to examine the pattern of LIF protein in the human endometrium during the menstrual cycle. A low level of LIF was detected in endometrial glands during the proliferative phase. During the luteal phase, LIF staining in the glands appeared stronger in the mid- and late luteal phase than immediately after ovulation. However, a low level of LIF was detected in the stromal cells during the early and midproliferative phase, while only a minimal level was observed during the late proliferative and luteal phases.
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Affiliation(s)
- Z M Yang
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas, USA
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24
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Yang ZM, Le SP, Chen DB, Cota J, Siero V, Yasukawa K, Harper MJ. Leukemia inhibitory factor, LIF receptor, and gp130 in the mouse uterus during early pregnancy. Mol Reprod Dev 1995; 42:407-14. [PMID: 8607969 DOI: 10.1002/mrd.1080420406] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Leukemia inhibitory factor (LIF) has been shown to play an important role in the implantation of mouse blastocysts. The present study was designed to investigate the changes of LIF protein, LIF receptor, and gp130 in the mouse uterus during the early pregnancy. LIF protein and LIF receptor were at high levels in the mouse uterus near the time of ovulation and on day 4 of pregnancy. gp130 was highest on days 3 and 4 of pregnancy. Both LIF receptor and gp130 showed strong staining in the stroma of the day 5 uterus, at a time when LIF protein was low. The presence of LIF receptor and gp130 in the luminal epithelium on day 4 and in the stroma on day 5 may indicate the site of the high affinity LIF receptor. The coexistence of a high level of LIF protein, LIF receptor, and gp130 in the day 4 uterus is consistent with the previously observed high level of uterine LIF mRNA on the same day and the importance of LIF for the blastocyst implantation in mouse.
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Affiliation(s)
- Z M Yang
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas 77030, USA
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25
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Kudolo GB, Yang YQ, Chen DB, Jones MA, Harper MJ. Differential metabolism of exogenous platelet-activating factor by glandular epithelial and stromal cells of rabbit endometrium. J Reprod Fertil 1995; 105:315-24. [PMID: 8568777 DOI: 10.1530/jrf.0.1050315] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Significant changes in platelet-activating factor (PAF; 1-O-alkyl-2-acetyl-sn-glycero-3-phosphorylcholine) concentration have been observed in rabbit endometrium during the preimplantation period, but, under in vitro conditions, constitutive PAF biosynthesis by isolated endometrial tissues was not easily demonstrable. Relative changes in enzymes involved in the synthesis and metabolism of PAF in the tissues may account for this disparity. In addition, during this period of preimplantation, marked changes in PAF receptor concentration have been noted. The present study examines the factors that may modulate the metabolism of exogenous [3H]PAF in the endometrium of rabbits on day 6 of pregnancy. Since preferential [3H]PAF binding in situ by the glandular epithelial, but not by the stromal, cells was demonstrated, their cell-specific metabolism of exogenous [3H]PAF was also examined. After entry into the endometrial cell, [3H]PAF was rapidly metabolized by the sequential action of cytosolic Ca(2+)-independent acetylhydrolase to [3H]lyso-PAF and this was in turn acylated by membrane-associated transacylase to [3H]alkylacyl-glycerylphosphorylcholine. PAF resynthesis was not observed and, in stromal cells, there was a significant build-up of [3H]lyso-PAF, suggesting that lyso-PAF:acetyl-CoA acetyl-transferase may be a limiting factor. In the glandular epithelial cells, however, there was a significant accumulation of a neutral lipid without a significant build-up of [3H]lyso-PAF or [3H]PAF. The neutral lipid co-migrated with the product of phospholipase C-catalysed metabolism of PAF and authentic 1-O-hexadecyl-2-acetyl-glycerol. In addition, the elution times of phospholipase C digestion of C18 PAF and the neutral lipid produced by cellular metabolism of [3H]PAF, determined by gas chromatography/flame ionization detection, were similar. It seems that it is the synthesis of the neutral lipid from reacetylated [3H]lyso-PAF that prevented [3H]PAF accumulation under in vitro conditions. This is the first documentation of the synthesis of this lipid in the mammalian uterus. The lipid may serve as the precursor for de novo PAF synthesis in the glandular epithelial cells during endometrial proliferation.
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Affiliation(s)
- G B Kudolo
- Department of Clinical Laboratory Sciences, School of Allied Health Science, University of Texas Health Science Center, San Antonio 78284, USA
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26
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Chen DB, Yang ZM, Hilsenrath R, Le SP, Harper MJ. Stimulation of prostaglandin (PG) F2 alpha and PGE2 release by tumour necrosis factor-alpha and interleukin-1 alpha in cultured human luteal phase endometrial cells. Hum Reprod 1995; 10:2773-80. [PMID: 8567812 DOI: 10.1093/oxfordjournals.humrep.a135790] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Tumour necrosis factor-alpha (TNF-alpha) and interleukin-1 alpha (IL-1 alpha) are important mediators of cell signalling in the uterus. Prostaglandins (PG) have been implicated in the increase of endometrial vascular permeability which occurs during the implantation process. This study evaluates the effect of these two pleiotropic cytokines on PGF2 alpha and PGE2 release from human luteal phase endometrial glandular epithelial cells (GEC) and stromal cells (STC) in culture. Basal PGF and PGE release did not differ significantly from each other or among cell types, and declined significantly with increasing number of days in culture. On day 3, basal PG release had decreased to half of that on day 1 of culture. However, both cell types were still able to respond to the addition of exogenous arachidonic acid (5 microM) on day 3 of culture, with PG release by GEC being elevated 7- to 10-fold and by STC moderately, but still significantly, on day 4. The permissive effect of arachidonic acid on the stimulation of PG release may indicate the down-regulation of phospholipase A2 with continued time in culture. However, the addition of arachidonic acid (5 microM) on day 0 of culture, while able to cause significantly increased PG release from GEC, had no effect on STC. In contrast, the addition of a combination of arachidonic acid (5 microM), and either recombinant human TNF-alpha (10 micrograms rhTNF-alpha/l) or 10 micrograms rhIL-1 alpha/l, had a synergistic action and caused the significantly increased release of PGF and PGE from both cell types, compared with that achieved with either arachidonic acid or the cytokine alone (although GEC responded more than STC). During the first 24 h after the addition of rhTNF-alpha or rhIL-1 alpha, both cytokines stimulated PG release from both cell types in a dose- and time-dependent fashion. Neither cycloheximide (10 microM) nor actinomycin D (10 microM) affected basal PG release, but both blocked cytokine-induced PG release from both cell types. These results suggest that there is a differential control of human endometrial cell PG biosynthesis, and that PG release may be regulated through gene activation.
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Affiliation(s)
- D B Chen
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA
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27
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Yang ZM, Chen DB, Le SP, Harper MJ. Interleukin-1 alpha in the rabbit uterus during early pregnancy. Early Pregnancy 1995; 1:201-5. [PMID: 9363252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Immunoreactive (ir) interleukin-1 alpha (IL-alpha) was present in the endometrium and myometrium of the rabbit uterus during early pregnancy. Interleukin-1 alpha was at a high level in endometrial epithelium from days 3 to 6 of pregnancy. A similar level of IL-1 alpha was detected on day 6 of pseudopregnancy. Interleukin-1 alpha declined rapidly on day 7 at both the implantation and non-implantation areas. Our results suggest that IL-1 alpha may play a role in rabbit blastocyst implantation.
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Affiliation(s)
- Z M Yang
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA
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28
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Chen DB, Hilsenrath R, Yang ZM, Le SP, Kim SR, Chuong CJ, Poindexter AN, Harper MJ. Leukaemia inhibitory factor in human endometrium during the menstrual cycle: cellular origin and action on production of glandular epithelial cell prostaglandin in vitro. Hum Reprod 1995; 10:911-8. [PMID: 7650142 DOI: 10.1093/oxfordjournals.humrep.a136060] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Leukaemia inhibitory factor (LIF) is a pleiotrophic cytokine which plays an obligatory role in mouse implantation. To investigate its potential role in the regulation of uterine function in the human, LIF secretion by isolated human endometrial glandular epithelial and stromal cells in primary culture was determined. Endometrial cells secreted a detectable amount of LIF protein during the first 48 h of culture. In the follicular and late-luteal phases, LIF secretion by both cell types was low. At every stage of the menstrual cycle, the epithelial cells secreted significantly more LIF than did stromal cells. Glandular epithelial cells of the mid-luteal phase, at the expected time of implantation in the human, secreted significantly more LIF than at other stages of the cycle. Stromal cells showed a similar, but nonsignificant, LIF secretion pattern. It could be concluded that endometrial LIF expression was dependent on cell type and stage of the menstrual cycle, and might thus play a role in human implantation. Oestradiol-17 beta stimulated both prostaglandin (PG) F and E release by the epithelial cells in both follicular and luteal phases. PGE release during the luteal phase was greater than in the follicular phase. However, addition of recombinant human LIF did not change either PGF or PGE release in either follicular or luteal phases, in the presence or absence of oestradiol.
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Affiliation(s)
- D B Chen
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA
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29
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Yang ZM, Le SP, Chen DB, Yasukawa K, Harper MJ. Expression patterns of leukaemia inhibitory factor receptor (LIFR) and the gp130 receptor component in rabbit uterus during early pregnancy. J Reprod Fertil 1995; 103:249-55. [PMID: 7616497 DOI: 10.1530/jrf.0.1030249] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The presence of leukaemia inhibitory factor (LIF) binding and expression of the gp130 component of the LIF receptor were studied in the rabbit uterus during pregnancy. LIF binding to myometrium was moderate in oestrous and non-oestrous animals and on day 1 of pregnancy, declined on days 2 and 3, and increased to a peak value on days 5 and 6 of pregnancy. Binding to stromal cells was not observed. Binding of LIF to luminal and glandular epithelium was low in unmated animals and on days 1 and 2 of pregnancy. Binding to luminal epithelium increased from day 3, and to glandular epithelium from day 5 of pregnancy. Highest binding was seen on days 5 and 6, with a slight decline observed on day 7, and with little difference between the mesometrial and antimesometrial regions of the implantation site. In all cases, binding of LIF was similar in the uteri of day 6 pseudopregnant and pregnant animals. At all stages, gp130 was absent from stroma and almost absent from myometrium and glandular epithelium. It was expressed in luminal epithelium, reaching maximal expression on day 6 of pregnancy and pseudopregnancy, but diminished on day 7 of pregnancy, particularly in the antimesometrial area of the implantation site. The coexpression of LIF binding and gp130 may indicate the presence of high-affinity LIF receptor, which matches the pattern of LIF protein expression and, as in mice, suggests its importance for implantation.
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Affiliation(s)
- Z M Yang
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA
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30
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Abstract
Leukemia inhibitory factor (LIF) has been shown to play an important role in the implantation of mouse blastocysts. The present study was designed to document the appearance of LIF in the rabbit uterus during early pregnancy and to determine whether changes just prior to implantation, similar to those in mice, occurred. LIF was localized in endometrial epithelium, myometrium, and endometrial glands. A low level of LIF was detected in the uterus of nonestrous and estrous females. LIF expression reached its highest level on day 5 of pregnancy and declined on days 6 and 7. By day 13 of pregnancy, little endometrial LIF was apparent. The expression of LIF on day 5 of pseudopregnancy was similar to that on day 5 of pregnancy. LIF expression was much higher at implantation sites than that at nonimplantation areas on day 7 of pregnancy. It is concluded that LIF may be important for the implantation of rabbit blastocysts.
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Affiliation(s)
- Z M Yang
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
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31
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Chen DB, Jin L. [External route trabeculotomy combined with trabeculectomy in the treatment of congenital glaucoma]. Zhonghua Yan Ke Za Zhi 1993; 29:340-2. [PMID: 8020375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
27 patients (52 eyes) with congenital glaucoma, aged 45 days to 6 years, were performed external route trabeculotomy in combination with trabeculectomy. In the follow-up of 23 patients (45 eyes) for 4 to 48 months, the IOP was controlled in 93.4%. The operation was safe with little complication. The surgical technique and postoperative management were discussed.
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Affiliation(s)
- D B Chen
- Department of Ophthalmology, Teaching Hospital of Bengbu Medical College
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32
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Chen DB. [The model PC-A8610C artificial intraocular lens]. Zhonghua Yan Ke Za Zhi 1991; 27:84-6. [PMID: 1860410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The Model PC-A8610C artificial intraocular lens was developed in collaboration with the Institute of Optical Precision Machinery, Academia Sinica, in 1986. From April 1987 to November 1988, the lens was implanted in 80 eyes (73 cases) that were followed up 6-24 months. Corrected visual acuity was 0.5 or over in 90.9% of the patients and complications were few.
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Affiliation(s)
- D B Chen
- Department of Ophthalmology, Bengbu Medical College, Anhui Province
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