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McCulloch M, Hsieh E. M200 MANAGEMENT CONUNDRUMS IN MULTIPLE INTESTINAL ATRESIA WITH COMBINED IMMUNODEFICIENCY. Ann Allergy Asthma Immunol 2021. [DOI: 10.1016/j.anai.2021.08.341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Guo F, Song X, Li Y, Guan W, Pan W, Yu W, Li T, Hsieh E. Longitudinal change in bone mineral density among Chinese individuals with HIV after initiation of antiretroviral therapy. Osteoporos Int 2021; 32:321-332. [PMID: 32803316 PMCID: PMC9509525 DOI: 10.1007/s00198-020-05584-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 08/03/2020] [Indexed: 01/05/2023]
Abstract
UNLABELLED This is the first study to report changes in BMD and related risk factors among Chinese patients with HIV after initiation of tenofovir disoproxil fumarate (TDF)-containing antiretroviral therapy. Greater bone mineral density (BMD) loss was observed in patients treated with TDF, compared to those on non-TDF-containing regimens. Our findings provide important knowledge regarding the risk factors in the long-term clinical management of patients with HIV in China. INTRODUCTION Persons living with HIV (PLWH) are at increased risk for osteoporosis and fracture. Tenofovir disoproxil fumarate (TDF) has been associated with higher rates of bone mineral density (BMD) loss, osteoporosis, and fracture. Few studies have studied the impact among PLWH in Asia. METHODS We analyzed retrospectively patients from the outpatient HIV clinic of a large tertiary hospital in Beijing, China, from March 2007 to May 2016. Patients who had dual-energy X-ray absorptiometry testing prior to antiretroviral initiation and at 48 and/or 96 weeks after initiation were included in this analysis. RESULTS A total of 136 patients were included (mean age 36.0 ± 10.6 years) and over 90% participants were male and Han Chinese ethnicity. We observed greater declines in BMD at the spine from baseline to week 48 (-2.94% vs. -0.74%) and at the hip from baseline to week 96 (-4.37% vs. -2.34%) in the TDF group compared with the non-TDF group. With regard to HIV-specific parameters, longer duration since HIV diagnosis and undetectable viral load over time were associated with lower BMD at the hip [relative risk (RR) 0.97, 95% confidence index (CI) (0.95, 0.99) per 1 year increase and RR 0.96, 95%CI (0.94, 0.99), respectively] and femoral neck [RR 0.97, 95%CI (0.95, 0.99) per 1 year increase and RR 0.97, 95%CI (0.95, 0.998), respectively] over 96 weeks. CONCLUSIONS This is the first study to report changes in BMD among PLWH after initiation of TDF-based antiretroviral therapy in China. Our findings provide important knowledge for the long-term clinical management of PLWH from this region.
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Affiliation(s)
- F Guo
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, No.1 Shuaifuyuan, Wangfujing Street, Beijing, 100730, China
| | - X Song
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, No.1 Shuaifuyuan, Wangfujing Street, Beijing, 100730, China
| | - Y Li
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, No.1 Shuaifuyuan, Wangfujing Street, Beijing, 100730, China
| | - W Guan
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - W Pan
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, No.1 Shuaifuyuan, Wangfujing Street, Beijing, 100730, China
| | - W Yu
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - T Li
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, No.1 Shuaifuyuan, Wangfujing Street, Beijing, 100730, China.
- Center for AIDS Research, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
| | - E Hsieh
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, No.1 Shuaifuyuan, Wangfujing Street, Beijing, 100730, China.
- Section of Rheumatology, Allergy, and Clinical Immunology, Yale School of Medicine, 300 Cedar Street, TAC S-525, PO Box 208031, New Haven, CT, 06517, USA.
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Jin S, Hsieh E, Peng L, Yu C, Wang Y, Wu C, Wang Q, Li M, Zeng X. Incidence of fractures among patients with rheumatoid arthritis: a systematic review and meta-analysis. Osteoporos Int 2018; 29:1263-1275. [PMID: 29546507 DOI: 10.1007/s00198-018-4473-1] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 03/01/2018] [Indexed: 12/17/2022]
Abstract
UNLABELLED This study is the first meta-analysis investigating the pooled incidence rates of fractures among patients with RA. Our results demonstrated that this population is at high risk of overall and fragility fractures. Consideration of vertebral imaging and RA-specific risk factor assessment may aid in fracture prevention for this vulnerable group. INTRODUCTION This systematic review and meta-analysis aims to estimate the incidence of fractures (overall and fragility) in patients with rheumatoid arthritis (RA). METHODS MEDLINE, EMBASE, and CENTRAL were searched for cohort studies reporting incidence of fractures among patients with RA. Two reviewers independently assessed all studies for inclusion and extracted data. Pooled analyses of incidence rates and relative risk of fractures were conducted using a random-effects model. Subgroup analyses investigated potential sources of heterogeneity, and predictors of fractures were summarized. RESULTS Twenty-five studies were included in total. The pooled incidence rates of overall and fragility fractures were 33.00 (95% CI 18.39-59.21) and 15.31 (95% CI 10.43-22.47) per 1000 person-years, respectively. Patients with RA had a higher risk of overall (RR 1.52, 95% CI 1.07-2.14) and fragility (RR 1.61, 95% CI 1.44-1.79) fractures. Subgroup analyses suggested a higher risk of fragility fractures among female patients (31.03 vs. 23.75 per 1000 person-years). The pooled site-specific incidence rates of vertebral, hip, forearm, and proximal humeral fractures were 7.51 (95% CI 3.27-17.23), 4.33 (95% CI 2.26-8.27), 3.40 (95% CI 2.27-5.10), and 1.86 (95% CI 1.36-2.53) per 1000 person-years, respectively. Clinical vertebral fractures were underestimated compared with radiographic screening (4.29 vs. 42.40 per 1000 person-years). Predictors of fractures included both traditional OP risk factors and RA-specific factors. CONCLUSIONS Patients with RA are at high risk of incident overall and fragility fractures. Consideration of vertebral imaging for patients with additional OP risk factors, including RA-specific risk factors, may help with early OP diagnosis and timely intervention.
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Affiliation(s)
- S Jin
- Department of Rheumatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, No.1 Shuaifuyuan, Wangfujing Ave, Beijing, 100730, China
| | - E Hsieh
- Section of Rheumatology, Yale School of Medicine, 300 Cedar Street, TAC S-525, P.O. Box 208031, New Haven, CT, 06520-8031, USA.
| | - L Peng
- Department of Rheumatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, No.1 Shuaifuyuan, Wangfujing Ave, Beijing, 100730, China
| | - C Yu
- Department of Rheumatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, No.1 Shuaifuyuan, Wangfujing Ave, Beijing, 100730, China
| | - Y Wang
- Department of Epidemiology and Bio-statistics, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - C Wu
- Department of Rheumatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, No.1 Shuaifuyuan, Wangfujing Ave, Beijing, 100730, China
| | - Q Wang
- Department of Rheumatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, No.1 Shuaifuyuan, Wangfujing Ave, Beijing, 100730, China
| | - M Li
- Department of Rheumatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, No.1 Shuaifuyuan, Wangfujing Ave, Beijing, 100730, China.
| | - X Zeng
- Department of Rheumatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, No.1 Shuaifuyuan, Wangfujing Ave, Beijing, 100730, China
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Guo F, Cheng X, Hsieh E, Du X, Fu Q, Peng W, Li Y, Song X, Routy JP, Li T. Prospective plasma efavirenz concentration assessment in Chinese HIV-infected adults enrolled in a large multicentre study. HIV Med 2018; 19:10.1111/hiv.12607. [PMID: 29761920 PMCID: PMC6538474 DOI: 10.1111/hiv.12607] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/29/2018] [Indexed: 01/11/2023]
Abstract
OBJECTIVES Few studies have explored the optimal dosing for efavirenz in individuals from China. We investigated plasma efavirenz concentrations and their association with efficacy and tolerance of efavirenz 600 mg daily in Chinese HIV-infected adults. METHODS An analysis was performed using plasma samples from 455 patients enrolled in a prospective multicentre trial in China. A total of 1198 plasma samples collected at weeks 4, 24 and 48 following antiretroviral therapy initiation were analysed. The mid-dose interval efavirenz concentrations (C12 ) were determined using high-performance liquid chromatography. RESULTS The median efavirenz concentration (interquartile range) steadily increased over time from 3.02 (2.28-4.23) to 3.71 (2.91-4.91) mg/L from week 4 to 48 (P < 0.001). The proportion of patients with C12 > 4.0 mg/L also rose from 28.0% to 34.2% and 43.8%, measured at 4, 24 and 48 weeks, respectively (P < 0.001). Five patients had efavirenz concentrations < 1.0 mg/L at week 4, 24 or 48. In the multivariable regression analysis, lower body weight and non-Han ethnicities were associated with higher efavirenz concentrations over time. At each time-point, patients with a body weight < 60 kg had significantly higher efavirenz C12 compared with those with body weight ≥ 60 kg (P < 0.05). CONCLUSIONS Efavirenz concentrations increased steadily over 48 weeks, and a substantial proportion of participants had efavirenz C12 above the upper limit of the proposed therapeutic window, especially those with low body weight (< 60 kg). Based upon these findings, a dosage reduction of efavirenz to 400 mg daily may warrant consideration in this population, especially for those with lower body weight.
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Affiliation(s)
- F Guo
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - X Cheng
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - E Hsieh
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
- Department of Internal Medicine, Yale School of Medicine, New Haven, CT, USA
| | - X Du
- Department of Pharmacy and Pharmacology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - Q Fu
- Department of Pharmacy and Pharmacology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - W Peng
- Department of Pharmacy and Pharmacology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - Y Li
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - X Song
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
| | - J-P Routy
- Division of Hematology and Chronic Viral Illness Service, McGill University Health Centre, Montreal, Quebec, Canada
| | - T Li
- Department of Infectious Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China
- Center for AIDS Research, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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Chen H, Hsieh E, Tseng W, Hung Y, Yao C. Develop and optimize a serum-free freezing medium for cryopreservation of human hematopoietic stem cells. Cytotherapy 2018. [DOI: 10.1016/j.jcyt.2018.02.360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Kinupe Abrahao A, Jamani R, Hsieh E, Ko YJ. Analysis of PD-L1 Expression in Patients with Gastrointestinal Stromal Tumors. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx387.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Huang J, Li M, Tian Z, Hsieh E, Wang Q, Liu Y, Xu D, Hou Y, Zhao J, Guo X, Lai J, Hu C, Song N, Sun Q, Sun Q, Zhang F, Zhao Y, Zeng X. Clinical and laboratory characteristics of systemic sclerosis patients with pulmonary arterial hypertension in China. Clin Exp Rheumatol 2014; 32:S-115-21. [PMID: 25372797] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Accepted: 09/04/2014] [Indexed: 06/04/2023]
Abstract
OBJECTIVES Pulmonary arterial hypertension (PAH) is associated with significant morbidity and mortality, especially in systemic sclerosis (SSc). Since there was no published study regarding PAH in the Chinese SSc population, we aimed to describe a cohort to provide some data for early diagnosis. METHODS We evaluated 236 systemic sclerosis patients prospectively registered in the EUSTAR (European League Against Rheumatism Scleroderma Trial and Research Group) database from the Peking Union Medical College Hospital from 2009 to 2012. Among them, 33 individuals received right heart catheterisations (RHC) while the remaining patients were grouped by echocardiographic data. These patients were classified into two groups, PAH and non-PAH group. Their clinical and laboratory features were statistically analysed to identify possible risk factors for PAH in Chinese SSc population. RESULTS The possible prevalence of PAH in SSc patients was approximately 11% in our study. Digital ulcers (52.0% vs. 31.2%), telangiectasias (64.0% vs. 37.6%) and gastroesophageal reflux disease (GERD) (60.0% vs. 36.2%) were more common in SSc patients with PAH. Some laboratory results were also proved to be significantly correlated with it. Logistic regression analysis showed that telangiectasias (OR=2.888, 95% CI=1.176-7.093), presence of GERD (OR=2.592, 95% CI=1.067-6.296), anti-RNP positivity (OR=24.384, 95% CI=1.978-36.651), IgA level elevation (OR=8.745, 95% CI 4.838-122.896) and FVC/TLCO ratio (OR=97.067, 95% CI 12.475-755.271) were associated with an increased odds for PAH in SSc patients. CONCLUSIONS This study described possible predictors of PAH in Chinese SSc population, which have been supported by similar studies in other ethnic groups.
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Affiliation(s)
- J Huang
- Department of Rheumatology, Peking Union Medical College Hospital, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, No.1 shuaifuyuan, Beijing 100730, China.
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Hsieh E, Wang Q, Zhang R, Li J, Zhou CW, Qiao Y, Fraenkel L, Bradley E, Smith J, Zhang P. Risk and prevalence of vertebral fractures among breast cancer survivors
in China. Ann Glob Health 2014. [DOI: 10.1016/j.aogh.2014.08.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Butowski NA, Lamborn K, Chang S, Hsieh E, Fedoroff A, Parvataneni R, Nicol S, Liepa A, Thornton D, Prados M. Phase II and pharmacogenomics study of enzastaurin plus temozolomide and radiation therapy in patients with glioblastoma multiforme or gliosarcoma. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.2020] [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] [Indexed: 11/20/2022] Open
Abstract
2020 Background: ENZ, an oral serine/threonine kinase inhibitor, suppresses signaling through PKCβ and the PI3K/AKT pathways to induce apoptosis, reduce proliferation, and suppress angiogenesis. The primary endpoint of this single-arm phase II trial was overall survival (OS). Secondary objectives included progression-free survival (PFS), safety, PK/PD, and patient-reported outcomes (PROs). A concurrent PGx project assessed the value of pretreatment molecular profiles as predictive of outcome. Magnetic resonance spectroscopy (MRS) was also evaluated during treatment for its value in predicting OS. Methods: Patients enrolled with newly diagnosed GBM/GS and KPS ≥60. Treatment started <5 weeks after diagnosis with RT 60 Gy given over 6 weeks and TMZ 75 mg/m2 given daily during RT and then at 200 mg/m2 from days 1–5 of a 28-day cycle. ENZ 250 mg/day was given daily during RT and adjuvantly. Planned treatment duration was 1 year. PGx parameters were: MGMT promoter methylation, mismatch repair status, PKC isoforms, pERK, pCREB, EGFR, PTEN, GSK3B, ser9, VEGF, and pS6. MRS was performed at baseline and at scheduled intervals. Changes in molecular signatures and imaging characteristics relative to survival were estimated using Kaplan-Meier and proportional hazards models. Analyses included phase I patients at ENZ 250 mg/day. Results: From September 2007 to November 2008, 60 phase II patients enrolled; 52 completed RT and eight are receiving RT. Of these, seven patients progressed immediately after RT and 17 progressed after one or more adjuvant cycles; five discontinued due to toxicity; four withdrew from trial. Treatment was well tolerated. The only toxicities seen in more than one-third of pateints were grade 1 fatigue, grade 1 nausea, and grade 1–2 lymphopenia. Grade 1 thrombocytopenia was seen in eight patients and grade 3 lymphopenia in five patients. OS, PFS, PROs, PGx, and imaging findings will be reported. Conclusions: The combination of ENZ plus TMZ during and following RT was well tolerated and may be an active regimen in GBM. This study represents the future of neuro-oncology clinical trial design by employing a novel multi-modal therapy while concurrently studying novel imaging and molecular techniques that may predict efficacy. [Table: see text]
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Affiliation(s)
- N. A. Butowski
- University of California, San Francisco, San Francisco, CA; Eli Lilly, Indianapolis, IN
| | - K. Lamborn
- University of California, San Francisco, San Francisco, CA; Eli Lilly, Indianapolis, IN
| | - S. Chang
- University of California, San Francisco, San Francisco, CA; Eli Lilly, Indianapolis, IN
| | - E. Hsieh
- University of California, San Francisco, San Francisco, CA; Eli Lilly, Indianapolis, IN
| | - A. Fedoroff
- University of California, San Francisco, San Francisco, CA; Eli Lilly, Indianapolis, IN
| | - R. Parvataneni
- University of California, San Francisco, San Francisco, CA; Eli Lilly, Indianapolis, IN
| | - S. Nicol
- University of California, San Francisco, San Francisco, CA; Eli Lilly, Indianapolis, IN
| | - A. Liepa
- University of California, San Francisco, San Francisco, CA; Eli Lilly, Indianapolis, IN
| | - D. Thornton
- University of California, San Francisco, San Francisco, CA; Eli Lilly, Indianapolis, IN
| | - M. Prados
- University of California, San Francisco, San Francisco, CA; Eli Lilly, Indianapolis, IN
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Abstract
Efficiency calibrations of multiple high-purity germanium (HPGe) detectors are being maintained at the National Institute of Standards and Technology (NIST). Four generally available software packages for HPGe detector gamma-ray spectrum analysis, including the one currently used at NIST, were tested on spectra collected from two HPGe detectors at different source-to-detector distances and using point sources and ampoules as calibration geometries. The resulting efficiency curves were inter-compared.
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Affiliation(s)
- L Pibida
- National Institute of Standards and Technology, Gaithersburg, MD 20899-8462, USA.
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Abstract
As the number of women infected with HIV in the United States continues to increase, the medical community is faced with the challenge of providing adequate and appropriate care to them. This paper reviews key questions concerning the state of knowledge on the epidemiology, biology, and clinical care of women living with HIV and AIDS in the United States. Because heterosexual transmission accounts for a growing number of cases among women, biological factors and cofactors that may enhance women's susceptibility to HIV infection are also reviewed. HIV-related gynecological issues are presented separately to evaluate whether gynecological complications are distinct in HIV-uninfected and HIV-infected women. Questions of whether there are sex-specific differences in the efficacy and adverse effects of new antiviral agents are discussed. In addition, significant gaps are highlighted that still exist in our understanding of both the effects of HIV and HIV-related drugs upon pregnancy. Finally, the psychiatric stresses and complications that affect women living with HIV and AIDS are also discussed. In each section of this review, gaps in our knowledge of these issues are identified. To properly address these disparities in knowledge, not only do efforts to gather sex-specific biomedical data need to be more exacting, but there is a distinct need to conduct more sex-specific research concerning HIV.
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Affiliation(s)
- R Marlink
- Harvard AIDS Institute, Boston, MA 02115, USA
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Marcus VA, Madlensky L, Gryfe R, Kim H, So K, Millar A, Temple LK, Hsieh E, Hiruki T, Narod S, Bapat BV, Gallinger S, Redston M. Immunohistochemistry for hMLH1 and hMSH2: a practical test for DNA mismatch repair-deficient tumors. Am J Surg Pathol 1999; 23:1248-55. [PMID: 10524526 DOI: 10.1097/00000478-199910000-00010] [Citation(s) in RCA: 175] [Impact Index Per Article: 7.0] [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: 01/21/2023]
Abstract
Inactivation of deoxyribonucleic acid (DNA) mismatch repair genes, most commonly human mutL homologue 1 (hMLH1) or human mutS homologue 2 (hMSH2), is a recently described alternate pathway in cancer development and progression. The resulting genetic instability is characterized by widespread somatic mutations in tumor DNA, and is termed high-frequency microsatellite instability (MSI-H). Although described in a variety of tumors, mismatch repair deficiency has been studied predominantly in colorectal carcinoma. Most MSI-H colorectal carcinomas are sporadic, but some occur in patients with hereditary nonpolyposis colorectal cancer (HNPCC), and are associated with germline mutations in mismatch repair genes. Until now, the identification of MSI-H cancers has required molecular testing. To evaluate the role of immunohistochemistry as a new screening tool for mismatch repair-deficient neoplasms, the authors studied the expression of hMLH1 and hMSH2, using commercially available monoclonal antibodies, in 72 formalin-fixed, paraffin-embedded tumors that had been tested previously for microsatellite instability. They compared immunohistochemical patterns of 38 MSI-H neoplasms, including 16 cases from HNPCC patients with known germline mutations in hMLH1 or hMSH2, with 34 neoplasms that did not show microsatellite instability. Thirty-seven of 38 MSI-H neoplasms were predicted to have a mismatch repair gene defect, as demonstrated by the absence of hMLH1 and/or hMSH2 expression. This included correspondence with all 16 cases with germline mutations. All 34 microsatellite-stable cancers had intact staining with both antibodies. These findings clearly demonstrate that immunohistochemistry can discriminate accurately between MSI-H and microsatellite-stable tumors, providing a practical new technique with important clinical and research applications.
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Affiliation(s)
- V A Marcus
- Department of Pathology, Samuel Lunenfeld Research Institute and Mount Sinai Hospital, Toronto, Canada
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Yuan ZQ, Wong N, Foulkes WD, Alpert L, Manganaro F, Andreutti-Zaugg C, Iggo R, Anthony K, Hsieh E, Redston M, Pinsky L, Trifiro M, Gordon PH, Lasko D. A missense mutation in both hMSH2 and APC in an Ashkenazi Jewish HNPCC kindred: implications for clinical screening. J Med Genet 1999; 36:790-3. [PMID: 10528862 PMCID: PMC3622028 DOI: 10.1136/jmg.36.10.792] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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Kania DR, Kornblum H, Hammel BA, Seely J, Brown C, Feldman U, Glendinning G, Young P, Hsieh E, Hennesian M, DaSilva L, MacGowan BJ, Montgomery DS, Back CA, Doyas R, Edwards J, Lee RW. Characterization of an x-ray-flux source for the production of high-energy-density plasmas. Phys Rev A 1992; 46:7853-7868. [PMID: 9908136 DOI: 10.1103/physreva.46.7853] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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MacGowan BJ, Kania DR, Hammel BA, Back CA, Hsieh E, Doyas R, Iglesias CA, Rogers FJ, Lee RW. Absorption measurements demonstrating the importance of Delta n=0 transitions in the opacity of iron. Phys Rev Lett 1992; 69:438-441. [PMID: 10046939 DOI: 10.1103/physrevlett.69.438] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Chao T, Hsieh E, Hwang B. A study of the effect of humidification on temperature of incubators in the nursery in Taiwan. Zhonghua Yi Xue Za Zhi (Taipei) 1989; 44:25-30. [PMID: 2819565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
To test whether it is necessary to humidify incubators in Taiwan, over a one-year-period, 180 sets of simultaneous recordings including room temperature, room humidity, incubator temperature and incubator humidity were collected. Water was randomly added to half of the incubators. Cultures from those and swab cultures from the other half, or the dry humidifiers were presented simultaneously for examination. Results showed that incubator humidities were unaffected by seasonal changes, while room humidities did change with the seasons. Adding water to incubators could raise the humidity to a significantly higher level (mean +/- SD: 60.70 +/- 7.86%) than in those without water (mean +/- SD: 50.30 +/- 6.45% P less than 0.01). Bacterial growth rate of incubators with water was significantly higher (89.09%) than those without water (37.93%, p less than 0.01), but the organisms cultured could not be related to babids' illnesses on clinical and/or laboratory grounds.
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Castleman A, Hsieh E, Upschulte B, Schelling F, Keesee R, Holland P. Some considerations of the dynamics of ion molecule cluster reactions. ACTA ACUST UNITED AC 1983. [DOI: 10.1016/0020-7381(83)87168-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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