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Luo L, Wang Z, Wang X, Gao J, Zheng A, Duan X. Fluorine-18 prostate-specific membrane antigen-1007-avid indeterminate bone lesions in prostate cancer: clinical and PET/CT features to predict outcomes and prognosis. Clin Radiol 2024; 79:346-353. [PMID: 38216370 DOI: 10.1016/j.crad.2023.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/29/2023] [Accepted: 12/11/2023] [Indexed: 01/14/2024]
Abstract
AIM To determine clinical and fluorine-18 prostate-specific membrane antigen-1007 (18F-PSMA-1007) integrated positron-emission tomography (PET)/computed tomography (CT) features that could be used to interpret indeterminate bone lesions (IBLs) and assess the prognosis of prostate cancer (PCa) in patients with IBLs. MATERIALS AND METHODS Consecutive patients who underwent PSMA PET/CT were analysed retrospectively. IBLs were identified as benign or malignant based on follow-up imaging and clinical management. Lesion- and patient-based assessments were performed to define features predictive of bone lesion results and determine clinical risk. Patients' prognosis was analysed based on clinical characteristics, including prostate-specific antigen (PSA) and alkaline phosphatase (ALP), respectively. RESULTS A total of 105 patients (mean age ± SD, 72.1 ± 8 years) were evaluated and 158 IBLs were identified. Fifty-three (33.5%), 36 (22.8%), and 69 (43.7%) IBLs were benign, malignant, and equivocal, respectively. Variables including location, maximum standard uptake value (SUVmax), and lymph node metastases (LNM) were related to the benignancy or malignancy of IBLs (p=0.046, p<0.001 and p<0.001, respectively). Regression analysis indicated that LNM, SUVmax, and location of IBLs could be predictors of lesion interpretation (p<0.001, p=0.002 and p=0.035). Patients with benign IBLs experienced the most considerable decreases in PSA and ALP levels. CONCLUSIONS LNM, SUVmax, and location may contribute to IBL interpretation. A rapid decrease in PSA and ALP levels might suggest a better prognosis for patients with benign IBLs.
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Affiliation(s)
- L Luo
- PET/CT Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Z Wang
- PET/CT Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - X Wang
- PET/CT Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - J Gao
- PET/CT Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - A Zheng
- PET/CT Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - X Duan
- PET/CT Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.
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Abstract
BACKGROUND Although the literature supports not using preoperative antibiotic prophylaxis for clean soft tissue procedures around the hand, there is limited data for soft tissue procedures around the elbow, such as cubital tunnel release. Complications of postoperative infection include scarring, stiffness, and rarely, amputation. The purpose of this study is to determine if preoperative antibiotic prophylaxis decreases the risk of surgical site infection for cubital tunnel release. METHODS A retrospective review of 919 in situ, subcutaneous transposition, and submuscular transposition cubital tunnel surgery at a tertiary care center was performed. Patient records were searched to determine preoperative antibiotic status and infection within 30 days of surgery. In addition, comorbidities and demographics such as age, race, sex, and past medical history were also identified. Comorbidities with qualitative variables were analyzed with odds ratio, Chi-squared, and Fisher's Exact test, linear variables analyzed with t-test. RESULTS There were 5/296 (1.7%) infections in patients without preoperative antibiotics, and 17/623 (2.7%) infections in patients with preoperative antibiotics. Patients who had received preoperative antibiotics had no significant change in infection rate (95% odds ratio: 0.597-1.633). Other variables, such as age, body mass index, race, surgeon, insurance type, diabetes, depression, anxiety, arthritis, concurrent surgeries, and hyperlipidemia were also not significant for risk of infection. CONCLUSIONS Preoperative antibiotics do not demonstrate benefit for patients undergoing uncomplicated ulnar nerve releases at the elbow. Preoperative antibiotics do not significantly decrease the risk for postoperative infections in patients, regardless of patient comorbidities.Type of Evidence: Level 4-retrospective study.
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Affiliation(s)
| | - John R. Fowler
- Department of Orthopaedics, University of Pittsburgh Medical Center, PA, USA
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Zheng A, Huang N, Bean D, Rayapaneni S, Deeney J, Sagar M, Hamilton JA. Resolvin E1 heals injured cardiomyocytes: Therapeutic implications and H-FABP as a readout for cardiovascular disease & systemic inflammation. Prostaglandins Leukot Essent Fatty Acids 2023; 197:102586. [PMID: 37604082 DOI: 10.1016/j.plefa.2023.102586] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 08/07/2023] [Accepted: 08/08/2023] [Indexed: 08/23/2023]
Abstract
The purpose of this study is to investigate heart-fatty acid binding protein (H-FABP) leakage from cardiomyocytes as a quantitative measure of cell membrane damage and to test healing by Resolvin E1 (RVE1) as a potential therapeutic for patients with inflammatory diseases (cardiovascular disease and comorbidities) with high morbidity and mortality. Our quantitative ELISA assays demonstrated H-FABP as a sensitive and reliable biomarker for measuring cardiomyocyte damage induced by lipopolysaccharide (LPS) and healing by RvE1, a specialized pro-resolving mediator (SPM) derived from the Omega-3 fatty acid, eicosapentaenoic acid (EPA), a dietary nutrient that balances inflammation to restore homeostasis. RvE1 reduced leakage of H-FABP by up to 86%, which supports our hypothesis that inflammation as a mechanism of injury can be targeted for therapy. H-FABP as a blood biomarker was tested in 40 patients admitted to Boston Medical Center for respiratory distress, (20 patients with and 20 patients without COVID infection). High levels of H-FABP correlated with clinically diagnosed CVD, diabetes, and end-stage renal disease (ESRD) in both patient groups. The level of H-FABP indicates not only CVD damage but is a valuable measure for patients with increased inflammation disease comorbidities.
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Affiliation(s)
- A Zheng
- Boston University, United States of America
| | - N Huang
- Boston University School of Medicine, United States of America
| | - D Bean
- Boston University School of Medicine, United States of America
| | | | - Jude Deeney
- Boston University School of Medicine, United States of America
| | - M Sagar
- Boston Medical Center, United States of America
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Dooley SW, Gong MF, Carlson LA, Frear AJ, Mandell JB, Zheng A, Bhogal S, Schoedel KE, Weiss KR. Postoperative infection and bone sarcoma survival: systematic review of the role of infection in bone sarcoma prognosis. Ann Jt 2023; 8:22. [PMID: 38529233 PMCID: PMC10929285 DOI: 10.21037/aoj-22-41] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 06/16/2023] [Indexed: 03/27/2024]
Abstract
Background Osteosarcoma (OS) and chondrosarcoma (CS) are primary bone malignancies whose prognoses have stagnated despite advancements in surgical management, chemotherapy, radiation therapy, and immunotherapy. The role of the immune system in generating anti-cancer physiologic responses is critical to prognosis. Prior studies have explored if immune system activation via infection enhances survival in bone sarcomas without a clear consensus. Methods This study sought to (I) retrospectively examine the effect of postoperative infection on survival in OS and CS and (II) systematically review the effect of postoperative infection on survival in primary bone malignancies. We performed a retrospective case-control study of 192 patients treated between 1/2000-12/2015 at a single academic sarcoma referral center. Patients with OS or CS undergoing operative resection were included. Eligible patients were grouped by presence of metastasis, and survival was compared between patients with or without postoperative infection. Furthermore, we performed a systematic review following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines investigating the effect of infection on primary bone malignancy survival. Risk of bias assessment was performed utilizing the ROBINS-I (Risk of Bias in Non-randomized Studies-of Interventions) assessment tool. All presented studies included author information, study population, and overall or disease-free survival results. Results One hundred and four patients were included, with 85 without infection (26 metastatic, 59 non-metastatic) and 19 with infection (10 metastatic, 9 non-metastatic). Five-year survival was greatest in patients without metastasis with a postoperative infection (100%), followed by patients without metastasis who were infection-free (80%). Five-year survival was comparatively lower in patients with metastasis who were infection-free (35%) and lowest in patients with metastasis with a postoperative infection (20%). No significant differences were present (P=0.17) on log-rank analysis. Our systematic review collected six studies exploring the impact of infection on primary bone malignancy survival, with two studies reporting significant findings of infection improving survival. Limitations of this review included risk of bias due to confounding, inconsistency comparing outcomes, and differences in patient populations. Conclusions This retrospective study and systematic review suggests postoperative infection may play a role in modulating immune response to malignancy. Understanding the synergy between anti-pathogen and anti-cancer responses warrants further investigation as an alternative method of targeted cancer treatment.
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Affiliation(s)
- Sean W. Dooley
- Musculoskeletal Oncology Laboratory, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Matthew F. Gong
- Musculoskeletal Oncology Laboratory, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Luke A. Carlson
- Musculoskeletal Oncology Laboratory, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Andrew J. Frear
- Musculoskeletal Oncology Laboratory, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Jonathan B. Mandell
- Department of Microbiology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Aaron Zheng
- Musculoskeletal Oncology Laboratory, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Sumail Bhogal
- Musculoskeletal Oncology Laboratory, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Karen E. Schoedel
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Kurt R. Weiss
- Musculoskeletal Oncology Laboratory, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- UPMC Hillman Cancer Center, Pittsburgh, PA, USA
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Fox MA, Drain NP, Rai A, Zheng A, Carlos NB, Serrano Riera R, Sabzevari S, Hughes JD, Popchak A, Rodosky MW, Lesniak BP, Lin A. Increased Failure Rates After Arthroscopic Bankart Repair After Second Dislocation Compared to Primary Dislocation With Comparable Clinical Outcomes. Arthroscopy 2023; 39:682-688. [PMID: 36740291 DOI: 10.1016/j.arthro.2022.10.012] [Citation(s) in RCA: 1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 09/23/2022] [Accepted: 10/10/2022] [Indexed: 12/12/2022]
Abstract
PURPOSE The purpose of this study was to compare rates of recurrent dislocation and postsurgical outcomes in patients undergoing arthroscopic Bankart repair for anterior shoulder instability immediately after a first-time traumatic anterior dislocation versus patients who sustained a second dislocation event after initial nonoperative management. METHODS A retrospective chart review was performed of patients undergoing primary arthroscopic stabilization for anterior shoulder instability without concomitant procedures and minimum 2-year clinical follow-up. Primary outcome was documentation of a recurrent shoulder dislocation. Secondary clinical outcomes included range of motion, Visual Analog Scale (VAS), American Shoulder and Elbow Surgeons Shoulder Score (ASES), and Shoulder Activity Scale (SAS). RESULTS Seventy-seven patients (mean age 21.3 years ± 7.3 years) met inclusion criteria. Sixty-three shoulders underwent surgical stabilization after a single shoulder dislocation, and 14 underwent surgery after 2 dislocations. Average follow-up was 35.9 months. The rate of recurrent dislocation was significantly higher in the 2-dislocation group compared to single dislocations (42.8% vs 14.2%, P = .03). No significant difference was present in range of motion, VAS, ASES, and SAS scores. The minimal clinically important difference (MCID) was 1.4 for VAS and 1.8 for SAS scores. The MCID was met or exceeded in the primary dislocation group in 31/38 (81.6%) patients for VAS, 23/31 (74.1%) for ASES, and 24/31 for SES (77.4%) scores. For the second dislocation cohort, MCID was met or exceeded in 7/9 (77.8%) for VAS, 4/7 (57.1%) for ASES, and 5/7 for SES (71.4%) scores. CONCLUSION Immediate arthroscopic surgical stabilization after a first-time anterior shoulder dislocation significantly decreases the risk of recurrent dislocation in comparison to those who undergo surgery after 2 dislocation events, with comparable clinical outcome scores. These findings suggest that patients who return to activities after a primary anterior shoulder dislocation and sustain just 1 additional dislocation event are at increased risk of a failing arthroscopic repair. STUDY DESIGN Retrospective comparative study; Level of evidence, 3.
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Affiliation(s)
- Michael A Fox
- Pittsburgh Shoulder Institute, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania.
| | - Nicholas P Drain
- Pittsburgh Shoulder Institute, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Ajinkya Rai
- Pittsburgh Shoulder Institute, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Aaron Zheng
- University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Noel B Carlos
- University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Rafael Serrano Riera
- Pittsburgh Shoulder Institute, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Soheil Sabzevari
- Pittsburgh Shoulder Institute, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Jonathan D Hughes
- Pittsburgh Shoulder Institute, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Adam Popchak
- Department of Physical Therapy, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Mark W Rodosky
- Pittsburgh Shoulder Institute, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Bryson P Lesniak
- Pittsburgh Shoulder Institute, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Albert Lin
- Pittsburgh Shoulder Institute, Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
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Moore H, Zheng A, Cairns A, Lillaney P, Black J. Enhancement of a Machine Learning Algorithm to Alert Sleep Clinicians of Patients at Risk for Narcolepsy, Using Nocturnal Polysomnography in General Sleep Medicine Clinics. Sleep Med 2022. [DOI: 10.1016/j.sleep.2022.05.429] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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7
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Bournet Q, Jonusas M, Zheng A, Guichard F, Natile M, Zaouter Y, Joffre M, Bonvalet A, Druon F, Hanna M, Georges P. Inline amplification of mid-infrared intrapulse difference frequency generation. Opt Lett 2022; 47:4885-4888. [PMID: 36181142 DOI: 10.1364/ol.467792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 08/22/2022] [Indexed: 06/16/2023]
Abstract
We demonstrate an ultrafast mid-infrared source architecture that implements both intrapulse difference frequency generation (iDFG) and further optical parametric amplification (OPA), in an all-inline configuration. The source is driven by a nonlinearly compressed high-energy Yb-doped-fiber amplifier delivering 7.4 fs pulses at a central wavelength of 1030 nm, at a repetition rate of 250 kHz. It delivers 1 µJ, 73 fs pulses at a central wavelength of 8 µm, tunable over more than one octave. By enrolling all the pump photons in the iDFG process and recycling the long wavelength pump photons amplified in the iDFG in the subsequent OPA, we obtain an unprecedented overall optical efficiency of 2%. These performances, combining high energy and repetition rate in a very simple all-inline setup, make this technique ideally suited for a growing number of applications, such as high harmonic generation in solids or two-dimensional infrared spectroscopy experiments.
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Drain N, Rai A, Zheng A, Carlos N, Lesniak B, Lin A, Fox M. Poster 152: Arthroscopic Bankart Repair Following a Second Dislocation Results in Increased Failure Rates Compared to Immediate Repair After Following a Traumatic First Time Dislocation. Orthop J Sports Med 2022. [PMCID: PMC9344142 DOI: 10.1177/2325967121s00713] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Objectives: Many surgeons will consider nonoperative treatment following a 1st
time dislocation and will consider operative management if a second
instability event occurs particularly for the in season athlete. The
objective of this study was to compare rates of recurrent dislocation and
post-surgical outcomes in patients undergoing arthroscopic bankart repair
for anterior shoulder instability immediately following a 1st
time traumatic anterior dislocation versus patients who sustained a
2nd dislocation event following initial conservative
management. We hypothesized that patients sustaining a 2nd
anterior shoulder dislocation would be more at risk for recurrent
dislocations after arthroscopic repair and secondarily, would have worse
objective and subjective outcomes. Methods: This was a retrospective chart review identifying all patients undergoing
primary arthroscopic surgical stabilization for anterior shoulder
instability between 2013-2019 at a single academic institution.
Demographics, clinical history, physical exam, imaging, operative details,
and postoperative course was reviewed. Patients were eligible for inclusion
if they underwent arthroscopic Bankart repair without remplissage sustained
one or two dislocation events and were clinically followed for a minimum of
12 months postoperatively. Exclusion criteria included posterior
instability, multidirectional instability, and previous stabilization
surgery, Primary outcome was documentation of recurrent shoulder dislocation
during the postoperative period. Secondary clinical outcome measures were
assessed including need for revision surgery, need for manipulation under
anesthesia (MUA), range of motion, strength, Subjective Shoulder Value
(SSV), Visual Analog Scale (VAS), PROMIS mental and physical health,
American Shoulder and Elbow Surgeons Shoulder Score (ASES), and Brophy
shoulder activity scores. Results: A series of 89 patients (mean age 21.3 years ± 7.3 years) met criteria for
inclusion. 72 shoulders underwent surgical stabilization after a single
shoulder dislocation event and 17 underwent surgery after sustaining two
documented shoulder dislocations. No significant difference in demographic
and radiographic characteristics, including presence of bony Bankart and
off-track Hill Sachs lesions, was present between the groups. The rate of
recurrent dislocation was significantly higher in the multiple dislocation
group compared to single dislocations (31% vs 12%, p=0.048). There was a
trend toward increased rate of revision stabilization in the 2nd
dislocation group which did not reach statistical significance (22% vs 58%,
p=0.167). No significant difference was present in the need for revision
surgery, need for MUA, conversion to Latarjet procedure, range of motion,
supraspinatus strength, VAS, PROMIS, ASES, and Brophy scores between the
groups. Conclusions: Immediate surgical stabilization following a 1st time dislocation
significantly diminishes the risk of recurrent dislocation in comparison to
those who undergo surgery following two dislocation events. These findings
suggest that patients who return to activities after a primary anterior
shoulder dislocation and undergo surgical stabilization following just one
additional event are at increased risk of failure following surgery.
Furthermore, patients who have sustained even one additional dislocation
from the primary event may benefit from more aggressive approaches may be
necessary including arthroscopic approaches with augmentation or open
approaches. Despite differences in recurrence rates, both groups achieved
excellent subjective functional outcomes at a minimum of 12 months after
surgery.
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Affiliation(s)
- Nicholas Drain
- University of Pittsburgh Medical Center
- UPMC Center for Sports Medicine
| | - Ajinkya Rai
- University of Pittsburgh Medical Center
- UPMC Center for Sports Medicine
| | - Aaron Zheng
- University of Pittsburgh Medical Center
- UPMC Center for Sports Medicine
| | - Noel Carlos
- University of Pittsburgh Medical Center
- UPMC Center for Sports Medicine
| | - Bryson Lesniak
- University of Pittsburgh Medical Center
- UPMC Center for Sports Medicine
| | - Albert Lin
- University of Pittsburgh Medical Center
- UPMC Center for Sports Medicine
| | - Michael Fox
- University of Pittsburgh Medical Center
- UPMC Center for Sports Medicine
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Vu T, Eberly H, Zheng A, Hintze A, Cruz J, Shin B. Abstract No. 599 Clinical significance of measuring hepatic venous pressure gradient during transjugular liver biopsy for patients with precirrhotic bridging fibrosis liver disease. J Vasc Interv Radiol 2022. [DOI: 10.1016/j.jvir.2022.03.581] [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: 10/18/2022] Open
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Ou L, Luo J, Wei Z, Zheng A, Xu J, Shi B. Urachal tuberculosis with invasion of the bladder wall: A case report and literature review. Actas Urol Esp 2022; 46:1-3. [PMID: 34838494 DOI: 10.1016/j.acuroe.2020.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 12/17/2020] [Indexed: 11/20/2022]
Affiliation(s)
- L Ou
- Department of Urology, Shenzhen Second People's Hospital/the First Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, Guangdong, China
| | - J Luo
- Department of Urology, Peking University Shenzhen Hospital, Shenzhen, Guangdong, China
| | - Z Wei
- Department of Urology, Shenzhen Second People's Hospital/the First Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, Guangdong, China
| | - A Zheng
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, Guangdong, China
| | - J Xu
- Department of Urology, Shenzhen Second People's Hospital/the First Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, Guangdong, China
| | - B Shi
- Department of Urology, Shenzhen Second People's Hospital/the First Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, Guangdong, China.
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Ou L, Luo J, Wei Z, Zheng A, Xu J, Shi B. Tuberculosis uracal con invasión de la pared vesical: informe de un caso y revisión de la literatura. Actas Urol Esp 2022. [DOI: 10.1016/j.acuro.2020.12.002] [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: 10/20/2022]
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Chen SR, Gibbs CM, Zheng A, Dalton JF, Gannon EJ, Shaw JD, Ward WT, Lee JY. Use of L5-S1 transdiscal screws in the treatment of isthmic spondylolisthesis: a technical note. J Spine Surg 2021; 7:510-515. [PMID: 35128125 PMCID: PMC8743294 DOI: 10.21037/jss-21-73] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 10/15/2021] [Indexed: 06/14/2023]
Abstract
Surgical treatment of L5-S1 isthmic spondylolisthesis consists of a combination of decompression and fusion. One previously discussed mode of fusion is via transdiscal screws. Biomechanical studies of transdiscal screws have demonstrated greater rigidity than traditional pedicle screw fixation, which theoretically translates to a higher fusion rate. Furthermore, when compared to pedicle screw fixation, transdiscal screw fixation also demonstrates improved functional and radiographic outcomes. However, transdiscal screw placement can be technically difficult. At this time, a detailed surgical technique has yet to be reported in the literature. Our surgical technique for transdiscal screw placement using intraoperative C-arm at L5-S1 is described. We include considerations for preoperative planning including necessary imaging and appropriate patient selection. We also discuss intraoperative concerns such as setup, surgical approach, proper screw trajectory, and our method for achieving indirect decompression. The results of thirteen consecutive patients treated with transdiscal screw fixation are described. One patient had subcutaneous seroma requiring reoperation (7.7%), three patients had implant failure (23.1%), and one patient had nonunion (7.7%). Our results suggest that transdiscal screw fixation is a safe and acceptable alternative for stabilization and indirect decompression of L5-S1 isthmic spondylolisthesis. Recent innovation in intraoperative navigation and robotic surgery may lessen the technical difficulty of transdiscal screw placement and make it even more effective.
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13
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Hao Q, Zheng A, Zhang H, Cao H. Down-regulation of betatrophin enhances insulin sensitivity in type 2 diabetes mellitus through activation of the GSK-3β/PGC-1α signaling pathway. J Endocrinol Invest 2021; 44:1857-1868. [PMID: 33464548 DOI: 10.1007/s40618-020-01493-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 07/08/2020] [Accepted: 12/23/2020] [Indexed: 12/23/2022]
Abstract
OBJECTIVE The incidence of type 2 diabetes mellitus (T2DM) among children and adolescents has been rising. Accumulating evidences have noted the significant role of betatrophin in the regulation of lipid metabolism and glucose homeostasis. In our study, we tried to figure out the underlying mechanism of betatrophin in insulin resistance (IR) in type 2 diabetes mellitus (T2DM). METHODS First, fasting serum betatrophin, fasting blood glucose (FBG), insulin, total cholesterol (TC), triglyceride (TG), and low-density lipoprotein cholesterol (LDL-C) were detected in T2DM children. The homeostasis model assessment of insulin resistance (HOMA-IR), Gutt insulin sensitivity index (ISIG) and Matsuda insulin sensitivity index (ISIM) were calculated. A T2DM-IR mouse model was induced by high-fat diet, with the expression of GSK-3β and PGC-1α detected. Besides, HepG2 cells were induced by a high concentration of insulin to establish an IR cell model (HepG2-IR). The cell viability, glucose consumption, liver glycogen content, inflammation, and fluorescence level of GSK-3β and PGC-1α were analyzed. RESULTS Betatrophin was highly expressed in serum of T2DM children and was positively correlated with FBG, insulin, TC, TG, LDL-C and HOMA-IR, while negatively correlated with ISIG and ISIM. Betatrophin and GSK-3β in the liver tissues of T2DM-IR mice were increased, while the PGC-1α expression was decreased. Betatrophin expression was negatively correlated with PGC-1α and positively correlated with GSK-3β. Silencing of betatrophin enhanced insulin sensitivity through the activation of GSK-3β/PGC-1α signaling pathway. In vitro experiments also found that silencing of betatrophin promoted glucose consumption and glycogen synthesis while inhibited inflammation. CONCLUSION Our findings concluded that silencing of betatrophin could enhance insulin sensitivity and improve histopathological morphology through the activation of GSK-3β/PGC-1α signaling pathway.
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Affiliation(s)
- Q Hao
- Department of Endocrinology, The First People's Hospital of Shangqiu, No.292 Kaixuan South Road, Shangqiu, 476100, Henan, People's Republic of China
| | - A Zheng
- College of Biology and Food, Shangqiu Normal University, Shangqiu, 476000, Henan, People's Republic of China
| | - H Zhang
- Department of Endocrinology, The First People's Hospital of Shangqiu, No.292 Kaixuan South Road, Shangqiu, 476100, Henan, People's Republic of China
| | - H Cao
- Department of Endocrinology, The First People's Hospital of Shangqiu, No.292 Kaixuan South Road, Shangqiu, 476100, Henan, People's Republic of China.
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Zheng A, Kira M, Adam RD, Papageorgiou P, Shambrook J, Abbas A, Vedwan K, Long J, Walkden M, Harden S, Peebles C, Flett AS. Characteristics and long-term outcomes of patients with reduced ejection fraction referred for adenosine stress perfusion cardiac magnetic resonance imaging. Eur Heart J Cardiovasc Imaging 2021. [DOI: 10.1093/ehjci/jeab090.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Background
Adenosine stress perfusion has been shown to be of minimal incremental benefit in distinguishing between ischaemic and non-ischaemic aetiology of severe left ventricular systolic dysfunction (LVSD) over and above that obtained from Cardiac Magnetic Resonance (CMR) with Late Gadolinium Enhancement (LGE). Stress CMR has, however, been shown to be effective in risk-stratifying LVSD patients, with ischaemia being an independent predictor of cardiovascular death or myocardial infarction (MI) and associated with higher rates of further intervention.
Purpose
Evaluate real world data from a single tertiary UK cardiac MRI centre to determine the characteristics and long-term clinical outcomes of patients with LVSD referred for stress CMR.
Methods
As part of an ongoing registry, all consenting patients with Ejection Fraction (EF) ≤40% and a completed adenosine stress perfusion CMR between January 2015 and December 2019 were included with prospective baseline data collection. All-cause mortality and cardiac hospitalisation, coronary angiography/revascularisation was determined from electronic hospital records. Outcomes were compared between the inducible ischaemia vs. no ischaemia groups, and LGE present vs. no LGE groups using chi square.
Results
The sample included 86 patients. The mean EF was 32 ± 6%. Median follow up was 3.8 years (range 41-2222 days). The indications for CMR were: 30 (35%) assess ischaemia, 35 (41%) assess LVSD aetiology and 21 (24%) LVSD assess viability.
Inducible ischemia was present in 30 (35%) patients and absent in 56 (65%). Patient characteristics and outcomes are shown in Table 1. Baseline characteristics were similar between the groups but there was a higher rate of hypertension and ischaemic heart disease in the ischaemia group. There was a non-significant difference in combined mortality and cardiac hospitalisation rates between the groups (40% vs. 27% p = 0.20).
LGE was present in 69 (80%) patients (28 with ischaemia; 41 without) and absent in 17 (20%, 2 with ischaemia, 15 without). The event rate was 23 (33%) vs. 4 (24%) between LGE vs. No LGE groups (p = 0.44). Of the 15 patients (17%) with no LGE or ischaemia; 2 died and 1 was hospitalised, there were no MI"s and no Percutaneous Coronary Intervention (PCI).
The lack of statistical difference in event rates between ischaemia and no ischaemia groups may be due to our relatively small sample size or could reflect the effectiveness of contemporary disease modifying treatment for Heart Failure with reduced EF.
Conclusion
This real-world data supports published findings that in patients with LVSD and no LGE on CMR, ischaemia is very uncommon and stress CMR is unlikely to increase diagnostic yield. Conversely, if stress CMR is performed and ischaemia is absent, incidence of subsequent angiography and revascularisation is very low, which is reassuring in clinical practice. In those patients without ischaemia and LGE, likelihood of MI is low.
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Affiliation(s)
- A Zheng
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom of Great Britain & Northern Ireland
| | - M Kira
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom of Great Britain & Northern Ireland
| | - RD Adam
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom of Great Britain & Northern Ireland
| | - P Papageorgiou
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom of Great Britain & Northern Ireland
| | - J Shambrook
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom of Great Britain & Northern Ireland
| | - A Abbas
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom of Great Britain & Northern Ireland
| | - K Vedwan
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom of Great Britain & Northern Ireland
| | - J Long
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom of Great Britain & Northern Ireland
| | - M Walkden
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom of Great Britain & Northern Ireland
| | - S Harden
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom of Great Britain & Northern Ireland
| | - C Peebles
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom of Great Britain & Northern Ireland
| | - AS Flett
- University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom of Great Britain & Northern Ireland
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15
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Abstract
Bone homeostasis is continually maintained by the process of bone remodeling throughout life. Recent studies have demonstrated that Wnt signaling pathways play a fundamental role in the process of bone homeostasis and remodeling. Intracellular Wnt signaling cascades are initially triggered by a Wnt ligand-receptor complex formation. In previous studies, the blocking of Wnt ligands from different osteoblastic differentiation stages could cause defective bone development at an early stage. Osteocytes, the most abundant and long-lived type of bone cell, are a crucial orchestrator of bone remodeling. However, the role of Wnt ligands on osteocyte and bone remodeling remains unclear. In our present study, we found that, besides osteoblasts, osteocytes also express multiple Wnt ligands in the bone environment. Then, we used a Dmp1-Cre mouse line, in which there is expression in a subset of osteoblasts but mainly osteocytes, to study the function of Wnt ligands on osteocyte and bone remodeling in vivo. Furthermore, we explored the role of Wnt ligands on osteocytic mineralization ability, as well as the regulatory function of osteocytes on the process of osteoblastic differentiation and osteoclastic migration and maturity in vitro. We concluded that Wnt proteins play an important regulatory role in 1) the process of perilacunar/canalicular remodeling, as mediated by osteocytes, and 2) the balance of osteogenesis and bone resorption at the bone surface, as mediated by osteoblasts and osteoclasts, at least partly through the canonical Wnt/β-catenin signaling pathway and the OPG/RANKL signaling pathway.
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Affiliation(s)
- J H Du
- 1 Department of Prosthodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,2 National Clinical Research Center for Oral Diseases, Shanghai, China.,3 Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai, China.,4 Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China
| | - S X Lin
- 1 Department of Prosthodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,2 National Clinical Research Center for Oral Diseases, Shanghai, China.,3 Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai, China.,4 Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China.,5 Department of Prosthodontics, School and Hospital of Stomatology, Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai, China
| | - X L Wu
- 1 Department of Prosthodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,2 National Clinical Research Center for Oral Diseases, Shanghai, China.,3 Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai, China.,4 Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China
| | - S M Yang
- 1 Department of Prosthodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,2 National Clinical Research Center for Oral Diseases, Shanghai, China.,3 Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai, China.,4 Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China
| | - L Y Cao
- 1 Department of Prosthodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,2 National Clinical Research Center for Oral Diseases, Shanghai, China.,3 Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai, China.,4 Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China
| | - A Zheng
- 1 Department of Prosthodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,2 National Clinical Research Center for Oral Diseases, Shanghai, China.,3 Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai, China.,4 Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China
| | - J N Wu
- 1 Department of Prosthodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,2 National Clinical Research Center for Oral Diseases, Shanghai, China.,3 Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai, China.,4 Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China
| | - X Q Jiang
- 1 Department of Prosthodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,2 National Clinical Research Center for Oral Diseases, Shanghai, China.,3 Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai, China.,4 Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Shanghai, China
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Welling J, Roennow A, Sauvé M, Brown E, Galetti I, Gonzalez A, Portales Guiraud AP, Kennedy A, Leite C, Riggs RJ, Zheng A, Perkovic Popovic M, Gilbert A, Moros L, Sroka-Saidi K, Schindler T, Finnern H. PARE0009 COMMUNITY ADVISORY BOARD INPUT CAN MAKE LAY SUMMARIES OF CLINICAL TRIAL RESULTS MORE UNDERSTANDABLE. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.4340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:Under European Union (EU) Clinical Trial regulations,1clinical research sponsors (CRSs) must ensure all studies performed in the EU are accompanied by a trial summary for laypersons, published within 1 year of study completion. These lay summaries should disseminate clinical trial results in an easy-to-understand way for trial participants, patient and caregiver communities, and the general public. The European Patients Forum (EPF)2and European Patients’ Academy on Therapeutic Innovation (EUPATI)3encourage CRSs to engage with patient organisations (POs) in the development of lay summaries. This recognises the patients’ contribution to clinical research and supports the development of patient-focused material.Objectives:We share learnings from a collaboration between scleroderma POs and a CRS to create the SENSCIS® trial (NCT02597933) written and video lay summaries.Methods:A community advisory board (CAB), comprising representatives from 11 scleroderma POs covering a range of countries/regions, was formed based on the EURORDIS charter for collaboration in clinical research.4Through three structured meetings, over a seven-month period, the CAB provided advice on lay summary materials (written and video) drafted by the CRS’ Lay Summary Group (Fig. 1). At each review cycle, the CAB advice was addressed to make content more understandable and more relevant for patients and the general public.Results:The CAB advised that the existence of lay summaries is not well known in the patient community and also recommended the development of trial-specific lay summary videos to further improve understandability of the clinical trial results for the general public. Videos are a key channel of communication, enabling access to information for people with specific health needs and lower literacy levels. Following CAB advice, the CRS developed a stand-alone video entitled“What are lay summaries?”and a trial-specific lay summary video. Revisions to lay summary content (written and video) included colour schemes, iconography and language changes to make content more understandable. For videos, adjustments to animation speed, script and voiceover were implemented to improve clarity and flow of information (Fig. 2). Approved final versions of lay summary materials are publicly available on the CRS website. Translation into languages representing trial-site countries is in progress to widen access to non-English speakers and, where possible, local versions are being reviewed by the patient community.Conclusion:Structured collection and implementation of CAB advice can make lay summary materials more understandable for the patient community and wider general public.References:[1]EU. Summaries of clinical trial results for laypersons. 2018[2]EPF. EPF position: clinical trial results – communication of the lay summary. 2015[3]EUPATI. Guidance for patient involvement in ethical review of clinical trials. 2018[4]EURORDIS. Charter for Collaboration in Clinical Research in Rare Diseases. 2009Disclosure of Interests:Joep Welling Speakers bureau: Four times as a patient advocate for employees of BII and BI MIDI with a fixed amount of € 150,00 per occasion., Annelise Roennow: None declared, Maureen Sauvé Grant/research support from: Educational grants from Boehringer Ingelheim and Janssen., EDITH BROWN: None declared, Ilaria Galetti: None declared, Alex Gonzalez Consultant of: Payment made to the patient organisation (Scleroderma Research Foundation) for participation in advisory boards, Alexandra Paula Portales Guiraud: None declared, Ann Kennedy Grant/research support from: AS FESCA aisbl, Catarina Leite: None declared, Robert J. Riggs: None declared, Alison Zheng Grant/research support from: We get grants from Lorem Vascular; BI China,; Jianke Pharmaceutical Co., Ltd.; Kangjing Biological Co., Ltd.; COFCO Coca-Cola to organize national scleroderma meetings, offer patients service, holding academic meetings and other public activities, there is also a small part of the grants used to pay the workers in our organization., Consultant of: I worked as a paid consultant for BI. Pay-per-job., Speakers bureau: I was invited once to be a speaker at BI China’s internal meeting and they paid me., Matea Perkovic Popovic: None declared, Annie Gilbert Consultant of: I have worked as a paid consultant with BI International for over 3 years, since Sept 2016., Lizette Moros Employee of: Lizette Moros is an employee of Boehringer Ingelheim, Kamila Sroka-Saidi Employee of: Paid employee of Boehringer Ingelheim., Thomas Schindler Employee of: Employee of Boehringer Ingelheim Pharma, Henrik Finnern Employee of: Paid employee of Boehringer Ingelheim.
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McAlpine AK, Sauve LJ, Collet JC, Goldfarb DM, Guest E, McDonald PJ, Zheng A, Srigley JA. Risk factors for cerebrospinal fluid shunt infections during an outbreak: a case-control study. J Hosp Infect 2019; 105:78-82. [PMID: 31870886 DOI: 10.1016/j.jhin.2019.12.012] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 12/12/2019] [Indexed: 10/25/2022]
Abstract
BACKGROUND There are few published reports of cerebrospinal fluid (CSF) shunt infection outbreaks. In 2017-2018, British Columbia Children's Hospital (BCCH) experienced an increase in CSF shunt infections co-incident with a move to new operating rooms and a change in shunt catheters used. AIMS To describe how an outbreak was detected, investigations were undertaken to determine the cause, risk factors associated with CSF shunt infection during the outbreak, and changes implemented to attempt to control the outbreak. METHODS Retrospective case-control study. Population included patients who underwent new shunt insertion or revision. Univariate logistic regression models were fitted for each of the variables. Associations with P-values <0.2 were considered of potential interest for further investigation. FINDINGS There were six cases of CSF shunt infection and 19 controls. The causative organism was different in each case. The only risk factors that met the criteria for further investigation were being a neonate at the time of surgery [odds ratio (OR) 9.0, 95% confidence interval (CI) 0.7-125.3, P=0.10] and the presence of gastrointestinal disease (OR 3.8, 95% CI 0.5-26.2, P=0.18). No association was found with the operating room used or the surgical staff. In response to the outbreak, human traffic through the operating rooms was limited, rigid adherence to the wearing of surgical masks was enforced, and return to the previous CSF shunt catheters used was implemented. CONCLUSION No modifiable risk factors were associated with CSF shunt infection. After implementation of surgical protocol changes, no further cases of CSF shunt infection linked to the outbreak were identified.
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Affiliation(s)
- A K McAlpine
- British Columbia Children's Hospital, Vancouver, British Columbia, Canada
| | - L J Sauve
- British Columbia Children's Hospital, Vancouver, British Columbia, Canada
| | - J C Collet
- British Columbia Children's Hospital, Vancouver, British Columbia, Canada
| | - D M Goldfarb
- British Columbia Children's Hospital, Vancouver, British Columbia, Canada
| | - E Guest
- British Columbia Children's Hospital, Vancouver, British Columbia, Canada
| | - P J McDonald
- British Columbia Children's Hospital, Vancouver, British Columbia, Canada
| | - A Zheng
- British Columbia Children's Hospital, Vancouver, British Columbia, Canada
| | - J A Srigley
- British Columbia Children's Hospital, Vancouver, British Columbia, Canada.
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Li B, Zhang J, Zhang K, Li G, Zheng A, Li J, Li X, Sun X, Chen S, Chen X, Liu L, Ye S, Liu X, Sheng Y, Ge H, Yu Z, Stchin G, Dai M, Wang J, Liu S. Chemoradiation with ENI versus IFI, High-Dose Versus Standard-Dose Radiation Therapy for Locally Advanced Esophageal Squamous Cell Carcinoma: Preliminary Results of Multicenter, Phase Ⅲ Clinical Trial (NROG 001-Northern Radiation Oncology Group of China). Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.2096] [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: 10/26/2022]
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Linch E, Miller L, Looney T, Zheng A, Topacio-Hall D, Nistala G, Lowman G, Hyland F, Andersen M. PO-394 Performance of a targeted T cell receptor beta immune repertoire sequencing panel in several FFPE tissue types – a tool for interrogation of the tumour microenvironment. ESMO Open 2018. [DOI: 10.1136/esmoopen-2018-eacr25.906] [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: 11/03/2022] Open
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20
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Zheng A, Yang X, Ye X, Huang G, Wei Z, Wang J, Han X, Ni X, Meng M. Bronchopleural fistula after lung ablation: Experience in two cases and literature review. Indian J Cancer 2016; 52 Suppl 2:e41-6. [PMID: 26728673 DOI: 10.4103/0019-509x.172512] [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: 11/04/2022]
Abstract
BACKGROUND Bronchopleural fistula (BPF) complicating lung tumor ablation is rare but severe. The purpose of this article was to study its characteristics and treatments. MATERIALS AND METHODS Two of 682 (0.3%) sessions of lung microwave ablation (MWA) were complicated with BPF and documented. Two electronic databases were searched for reported cases of BPF after lung tumor ablation. Case selection and data collection were done by 3 independent reviewers. RESULTS A 56-year-old man and a 61-year-old woman developed BPF after MWA and died. Thirteen cases (mean age 63.8, 61.5% male) of BPF with adequate information were identified from 8 articles. Of the 13 cases, 5 (38.5%) had pulmonary co-morbidity, 3 (23.1%) had a history of pulmonary surgery, 7 (53.8%) had a target tumor adjacent or abutting pulmonary pleura, and 6 (46.2%) developed severe infections. After chest tube placement, pleurodesis, endoscopic therapy, surgery, and other treatments, 12 were cured and 1 died of BPF and pneumonia. CONCLUSION BPF is a rare but severe complication of lung ablation, and the management needs a multidisciplinary and individualized treatment strategy.
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Affiliation(s)
| | | | - X Ye
- Department of Oncology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China
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21
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Yang A, Yu X, Zheng A, James AT. Rebalance between 7S and 11S globulins in soybean seeds of differing protein content and 11SA4. Food Chem 2016; 210:148-55. [PMID: 27211633 DOI: 10.1016/j.foodchem.2016.04.095] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 03/31/2016] [Accepted: 04/20/2016] [Indexed: 11/22/2022]
Abstract
Protein content and globulin subunit composition of soybean seeds affect the quality of soy foods. In this proteomic study, the protein profile of soybean seeds with high (∼45.5%) or low (∼38.6%) protein content and with or without the glycinin (11S) subunit 11SA4 was examined. 44 unique proteins and their homologues were identified and showed that both protein content and 11SA4 influenced the abundance of a number of proteins. The absence of 11SA4 exerted a greater impact than the protein content, and led to a decreased abundance of glycinin G2/A2B1 and G5/A5A4B3 subunits, which resulted in lower total 11S with a concomitant higher total β-conglycinin (7S). Low protein content was associated with higher glycinin G3/A1aB1b and lower glycinin G4/A5A4B3. Using the proteomic approach, it was demonstrated that 11SA4 deficiency induced compensatory accumulation of 7S globulins and led to a similar total abundance for 7S+11S irrespective of protein content or 11SA4.
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Affiliation(s)
- A Yang
- CSIRO Agriculture, 306 Carmody Road, St Lucia, QLD 4067, Australia.
| | - X Yu
- CSIRO Agriculture, 306 Carmody Road, St Lucia, QLD 4067, Australia; College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - A Zheng
- CSIRO Agriculture, 306 Carmody Road, St Lucia, QLD 4067, Australia; Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - A T James
- CSIRO Agriculture, 306 Carmody Road, St Lucia, QLD 4067, Australia
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Yang X, Zhang K, Ye X, Zheng A, Huang G, Li W, Wei Z, Wang J, Han X, Ni X, Meng M, Ni Y, Yuan Q, Xing C. Artificial pneumothorax for pain relief during microwave ablation of subpleural lung tumors. Indian J Cancer 2016; 52 Suppl 2:e80-3. [PMID: 26728680 DOI: 10.4103/0019-509x.172519] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND When microwave ablation (MWA) is used for subpleural lesions, severe pain was the common side effect under the local anesthesia conditions during the procedure and postprocedure. To study the pain relief effect of artificial pneumothorax in the treatment of subpleural lung tumors with MWA. MATERIALS AND METHODS From February 2012 to October 2014, 37 patients with 40 subpleural lung tumors underwent MWA, including 17 patients of 19 sessions given artificial pneumothorax prior to MWA (group-I), and 20 patients of 21 sessions without artificial pneumothorax (group-II). Patient's pain assessment scores (10-point visual analog scale [VAS]) at during-procedure, 6, 12, 24, and 48 h after the MWA procedure and mean 24 h morphine dose were compared between the two groups. Complications of the artificial pneumothorax were also summarized. RESULTS Pain VAS were 0.53, 0.65, 1.00, 0.24, and 0.18 at during-procedure, 6, 12, 24, and 48 h for group-I and 5.53, 2.32, 2.82, 1.21, and 0.21 for group-II, respectively. Pain VAS in group I was significantly decreased at during-procedure, 6, 12, and 24 h after the MWA (P < 0.001). No statistical pain VAS difference was observed at 48 h after the MWA between the two groups (P > 0.05). The mean 24 h morphine dose was 5.00 mg in group-I and 12.63 mg in group-II (P = 0.000). "Artificial pneumothorax" related complications occurred in two patients from group-I, including one pleural effusion and one minor hemoptysis. No patient in group-I and group-II died during the procedure or in 30 days after MWA. CONCLUSION Artificial pneumothorax is a safe and effective method for pain relief during MWA of subpleural lung tumors.
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Affiliation(s)
| | | | - X Ye
- Department of Oncology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong Province, China
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Kamyshova ES, Shvetsov MY, Kutyrina IM, Burdennyi AM, Zheng A, Nosikov VV, Bobkova IN. Clinical value of TNF, IL-6, and IL-10 gene polymorphic markers in chronic glomerulonephritis. TERAPEVT ARKH 2016; 88:45-50. [DOI: 10.17116/terarkh201688645-50] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Wang JM, Yuan XY, Shan D, Zheng A. Styrene/Isoprene/Styrene Thermoplastic Elastomer Prepared by Anionic Bulk Polymerization in a Twin-Screw Extruder. INT POLYM PROC 2015. [DOI: 10.3139/217.2884] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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]
Abstract
Abstract
In this study, a styrene/isoprene/styrene (SIS) triblock copolymer was synthesized in an intermeshing, co-rotating, twin-screw extruder. N-butyl lithium was used as the initiator. The styrene and isoprene monomer as well as 1,2-dibromoethane were sequentially added into the extruder. The weight content of isoprene in this copolymer was above 60%. Gel permeation chromatography (GPC) results showed that the polystyrene in the copolymer chains was mainly comprised of only one long block. Dynamic mechanical analysis (DMA) and transmission electron microscopy (TEM) showed that the polystyrene phase transferred from larger numbers of small microdomains to a continuous aggregation after the coupling reaction. As a result, the tensile stress and ultimate elongation was significantly improved, similar to the commercial product. Traditionally, SIS has only been synthesized by solution polymerization. The present work offers the capacity to synthesize it with very little or no solvent. This method fits the environmentally friendly trend.
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Affiliation(s)
- J.-M. Wang
- Key Laboratory for Ultrafine Materials of Ministry of Education , East China University of Science and Technology, Shanghai , PRC
| | - X.-Y. Yuan
- Key Laboratory for Ultrafine Materials of Ministry of Education , East China University of Science and Technology, Shanghai , PRC
| | - D. Shan
- Key Laboratory for Ultrafine Materials of Ministry of Education , East China University of Science and Technology, Shanghai , PRC
| | - A. Zheng
- Key Laboratory for Ultrafine Materials of Ministry of Education , East China University of Science and Technology, Shanghai , PRC
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Vorburger TV, Yen J, Song JF, Thompson RM, Renegar TB, Zheng A, Tong M. The Second National Ballistics Imaging Comparison (NBIC-2). J Res Natl Inst Stand Technol 2015; 119:644-673. [PMID: 26601051 PMCID: PMC4487285 DOI: 10.6028/jres.119.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/26/2014] [Indexed: 06/04/2023]
Abstract
In response to the guidelines issued by the American Society of Crime Laboratory Directors/Laboratory Accreditation Board (ASCLD/LAB-International) to establish traceability and quality assurance in U.S. crime laboratories, NIST and the ATF initiated a joint project, entitled the National Ballistics Imaging Comparison (NBIC). The NBIC project aims to establish a national traceability and quality system for ballistics identifications in crime laboratories utilizing ATF's National Integrated Ballistics Information Network (NIBIN). The original NBIC was completed in 2010. In the second NBIC, NIST Standard Reference Material (SRM) 2461 Cartridge Cases were used as reference standards, and 14 experts from 11 U.S. crime laboratories each performed 17 image acquisitions and correlations of the SRM cartridge cases over the course of about half a year. Resulting correlation scores were collected by NIST for statistical analyses, from which control charts and control limits were developed for the proposed quality system and for promoting future assessments and accreditations for firearm evidence in U.S. forensic laboratories in accordance with the ISO 17025 Standard.
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Ye X, Li W, Yang X, Li Y, Huang G, Wang J, Han X, Ni X, Wei Z, Zheng A, Meng M. Microwave ablation as palliative treatment of locally recurrent colorectal cancer. Indian J Cancer 2015; 52 Suppl 2:e61-3. [PMID: 26728676 DOI: 10.4103/0019-509x.172515] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Ye X, Han X, Yang X, Liu Q, Huang G, Wang J, Li W, Zheng A, Ni Y, Men M. Computed tomography-guided percutaneous microwave ablation of patients 75 years of age and older with early-stage nonsmall cell lung cancer. Indian J Cancer 2015; 52 Suppl 2:e56-60. [PMID: 26728675 DOI: 10.4103/0019-509x.172514] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Shvetsov MY, Zheng A, Kozlovskaya LV, Serova AG, Travkina EV, Mukhin NA. Urinary excretion of angiogenesis regulatory factors and renal injury markers in chronic glomerulonephritis: Significance in the assessment of progression. TERAPEVT ARKH 2015; 87:75-82. [DOI: 10.17116/terarkh201587675-82] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Wang X, Li H, Zheng A, Yang L, Liu J, Chen C, Tang Y, Zou X, Li Y, Long J, Liu J, Zhang Y, Feng Z. Mitochondrial dysfunction-associated OPA1 cleavage contributes to muscle degeneration: preventative effect of hydroxytyrosol acetate. Cell Death Dis 2014; 5:e1521. [PMID: 25393477 PMCID: PMC4260731 DOI: 10.1038/cddis.2014.473] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 08/27/2014] [Accepted: 10/06/2014] [Indexed: 01/15/2023]
Abstract
Mitochondrial dysfunction contributes to the development of muscle disorders, including muscle wasting, muscle atrophy and degeneration. Despite the knowledge that oxidative stress closely interacts with mitochondrial dysfunction, the detailed mechanisms remain obscure. In this study, tert-butylhydroperoxide (t-BHP) was used to induce oxidative stress on differentiated C2C12 myotubes. t-BHP induced significant mitochondrial dysfunction in a time-dependent manner, accompanied by decreased myosin heavy chain (MyHC) expression at both the mRNA and protein levels. Consistently, endogenous reactive oxygen species (ROS) overproduction triggered by carbonyl cyanide 4-(trifluoromethoxy) phenylhydrazone (FCCP), a mitochondrial oxidative phosphorylation inhibitor, was accompanied by decreased membrane potential and decreased MyHC protein content. However, the free radical scavenger N-acetyl-L-cysteine (NAC) efficiently reduced the ROS level and restored MyHC content, suggesting a close association between ROS and MyHC expression. Meanwhile, we found that both t-BHP and FCCP promoted the cleavage of optic atrophy 1 (OPA1) from the long form into short form during the early stages. In addition, the ATPase family gene 3-like 2, a mitochondrial inner membrane protease, was also markedly increased. Moreover, OPA1 knockdown in myotubes was accompanied by decreased MyHC content, whereas NAC failed to prevent FCCP-induced MyHC decrease with OPA1 knockdown, suggesting that ROS might affect MyHC content by modulating OPA1 cleavage. In addition, hydroxytyrosol acetate (HT-AC), an important compound in virgin olive oil, could significantly prevent t-BHP-induced mitochondrial membrane potential and cell viability loss in myotubes. Specifically, HT-AC inhibited t-BHP-induced OPA1 cleavage and mitochondrial morphology changes, accompanied by improvement on mitochondrial oxygen consumption capacity, ATP productive potential and activities of mitochondrial complex I, II and V. Moreover, both t-BHP- and FCCP-induced MyHC decrease was sufficiently inhibited by HT-AC. Taken together, our data provide evidence indicating that mitochondrial dysfunction-associated OPA1 cleavage may contribute to muscle degeneration, and olive oil compounds could be effective nutrients for preventing the development of muscle disorders.
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Affiliation(s)
- X Wang
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - H Li
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - A Zheng
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - L Yang
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - J Liu
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - C Chen
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Y Tang
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - X Zou
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Y Li
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - J Long
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - J Liu
- 1] Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China [2] Tianjin Key Laboratory of Exercise Physiology & Sports Medicine, Tianjin University of Sport, Tianjin 300381, China
| | - Y Zhang
- Tianjin Key Laboratory of Exercise Physiology & Sports Medicine, Tianjin University of Sport, Tianjin 300381, China
| | - Z Feng
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
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Wu S, Zhang X, Xia B, Luo H, Li J, Zheng A, Xie C, Wang L, Hu W, Lian X, Du D, Chen M, Bian X, Tan B, Hui Z, Zhao F, Tian Z, Liu H, Huang K, Hu J. Interim Results of a Randomized Controlled Phase III Trial of Elective Nodal Irradiation Plus Erlotinib Combined with Chemotherapy for Esophageal Squamous Cell Carcinoma (Nct00686114). Ann Oncol 2014. [DOI: 10.1093/annonc/mdu334.5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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Li X, Yi R, Liu B, Zheng A, Yu X, Yi P. Synthesis of New Spiro Isoxazoline-Pyrrolizinone Derivativesvia1,3-Dipolar Cycloaddition of Nitrile Oxide. J Heterocycl Chem 2013. [DOI: 10.1002/jhet.1610] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- X. Li
- Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, Hunan Province College Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering; Hunan University of Science and Technology; Xiangtan Hunan 411201 China
| | - R. Yi
- Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, Hunan Province College Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering; Hunan University of Science and Technology; Xiangtan Hunan 411201 China
| | - B. Liu
- Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, Hunan Province College Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering; Hunan University of Science and Technology; Xiangtan Hunan 411201 China
| | - A. Zheng
- Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, Hunan Province College Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering; Hunan University of Science and Technology; Xiangtan Hunan 411201 China
| | - X. Yu
- Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, Hunan Province College Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering; Hunan University of Science and Technology; Xiangtan Hunan 411201 China
| | - P. Yi
- Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, Hunan Province College Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering; Hunan University of Science and Technology; Xiangtan Hunan 411201 China
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Xue Y, Guan Y, Zheng A, Wang H, Xiao H. Synthesis and Characterization of Ciprofloxacin Pendant Antibacterial Cationic Polymers. Journal of Biomaterials Science, Polymer Edition 2012; 23:1115-28. [DOI: 10.1163/092050611x576639] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Y. Xue
- a Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada; Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Y. Guan
- b Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - A. Zheng
- c Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - H. Wang
- d Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada
| | - H. Xiao
- e Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada.
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Yao M, Zheng A, Tanaka I. Structure analysis of eukaryotic translation initiation factor complex 5B-1A. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311082511] [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: 11/10/2022] Open
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Tchebotareva N, Bobkova I, Kozlovskaya L, Li O, Plaisier E, Terrier B, Lacraz A, Bridoux F, Huart A, Marie I, Launay D, Hummel A, Saint-Martin L, Bonnet F, Belenotti P, Kahn JE, Hinschberger O, Rullier P, Cacoub P, Casian A, Szpirt W, Jayne D, Walsh M, Haris A, Polner K, Aranyi J, Braunitzer H, Meran Z, Kaszas I, Mazanowska O, Koscielska-Kasprzak K, Kaminska D, Penar J, Zabinska M, Dziemianko I, Krajewska M, Klinger M, Marco H, Corica M, Picazo M, Arce Y, Llobet JM, Diaz M, Ballarin J, Kuroki A, Akizawa T, Papasotiriou M, Kalliakmani P, Huang L, Gerolymos M, Goumenos DS, Johnson TS, Ogahara S, Abe Y, Ito K, Watanabe M, Saito T, Saito T, Watanabe M, Ito K, Abe Y, Ogahara S, Nesen A, Topchii I, Semenovylh P, Galchinskaya V, Bantis C, Heering P, Kouri NM, Schwandt C, Rump LC, Ivens K, Nagasawa Y, Iio K, Fukuda S, Date Y, Iwatani H, Yamamoto R, Horii A, Inohara H, Imai E, Ohno H, Rakugi H, Rakugi Y, Sahin OZ, Gibyeli Genek D, Alkan Tasli F, Yavas H, Gurses S, Yeniay P, Uzum A, Ersoy R, Cirit M, Christou D, Molyneux K, Peracha J, Feehally J, Smith AC, Barratt J, Yamamoto R, Nagasawa Y, Shoji T, Katakami N, Ohtoshi K, Hayaishi-Okano R, Yamasaki Y, Yamauchi A, Tsubakihara Y, Imai E, Rakugi H, Isaka Y, Faria B, Vidinha J, Pego C, Garrido J, Lemos S, Lima C, Sorbo G, Lorga E, Sousa T, Yavas HH, Sahin OZ, Ozen KP, Gibyeli Genek D, Ersoy R, Alkan Tasli F, Yucel O, Cirit M, Wada Y, Ogata H, Yamamoto M, Ito H, Kinugasa E, Lundberg S, Lundahl J, Gunnarsson I, Jacobson S, Camilla R, Loiacono E, Dapra V, Morando L, Conrieri M, Bianciotto M, Bosetti FM, Gallo R, Peruzzi L, Amore A, Coppo R, Jeong K, Kim Y, Lee TW, Lee SH, Moon JY, Lee S, Ihm C, Komatsu H, Fujimoto S, Kikuchi M, Sato Y, Kitamura K, Sulikowska B, Johnson R, Grajewska M, Donderski R, Odrowaz-Sypniewska G, Manitius J, Amore A, Camilla R, Morando L, Peruzzi L, Rollino C, Quarello F, Colla L, Segoloni G, Caramello E, Cravero R, Quaglia M, Stratta P, Mazzucco G, Coppo R, Coppo R, Grcevska L, Petrusevska G, Nikolov V, Polenakovic M, Lee KW, Ham YR, Jang WI, Jung JY, Jang DS, Chung S, Choi DE, Na KR, Shin YT, Sulikowska B, Johnson R, Grajewska M, Donderski R, Odrowaz-Sypniewska G, Manitius J, Pasquariello A, Innocenti M, Pasquariello G, Mattei P, Colombini E, Ricchiuti G, Sami N, Cupisti A, Rocchetti MT, Di Paolo S, Tamma G, Lasorsa D, Suriano IV, D'Apollo A, Papale M, Mastrofrancesco L, Grandaliano G, Svelto M, Valenti G, Gesualdo L, Wang C, Li Y, Jia N, Fan J, Vigotti FN, Daidola G, Colla L, Besso L, Segoloni GP, Rocchetti MT, Papale M, Di Paolo S, Vocino G, Suriano IV, D'Apollo A, Grandaliano G, Gesualdo L, Berthoux F, Mohey H, Laurent B, Mariat C, Afiani A, Thibaudin L, Rivera F, Segarra A, Praga M, Vozmediano C, Rivera F, Lopez JM, Hernandez D, Pesickova S, Rysava R, Lenicek M, Potlukova E, Jancova E, Vitek L, Honsova E, Zavada J, Svarcova J, Kalousova M, Trendelenburg M, Tesar V, Li X, Ren H, Zhang W, Pan X, Zhang Q, Chen X, Xu Y, Shen P, Chen N, Hruskova Z, Mareckova H, Svobodova B, Jancova E, Bednarova V, Rysava R, Tesar V, Bobrova L, Kozlovskaya N, Khafizova E, Meteleva N, Shakhnova E, Alsuwaida A, Hussain S, Alghonaim M, AlOudah N, Ullah A, Kfoury H, Lorusso P, Bottai A, Cipollini I, Giorgetti M, Barsotti G, Goplani K, Kaswan K, Gera D, Patel H, Gumber M, Shah P, Vanikar A, Trivedi H, Gluhovschi C, Gluhovschi G, Potencz E, Lazar E, Trandafirescu V, Petrica L, Velciov S, Bozdog G, Bob F, Gadalean F, Vernic C, Cioca D, Bantis C, Heering P, Stangou M, Kouri NM, Schwandt C, Memmos D, Rump LC, Ivens K, Tofik R, Rippe B, Torffvit O, Bakoush O, Silska M, Lipkowska K, Warzywoda A, Soltysiak J, Blumczynski A, Musielak A, Ostalska-Nowicka D, Zachwieja J, Spartalis M, Stangou M, Pliakos K, Oikonomidou D, Pantzaki A, Rizopoulou E, Efstratiadis G, Memmos D, Okino VT, Moyses Neto M, Silva GEB, Vieira Neto O, Romao EA, Coelho EB, Dantas M, Liakou H, Stangou M, Ekonomidou D, Pantzaki A, Patinakis P, Sigounas V, Efstratiadis G, Memmos D, Shvetsov M, Bobkova I, Zheng A, Li O, Chebotareva N, Kamyshova E, Rudenko T, Gelpi R, Navarro I, Ngango L, Poveda R, Goma M, Torras J, Grinyo JM, Fulladosa X, Wang Y, Ivany J, Jardine M, Zhong F, Wang W, Ren H, Xie Y, Huang Q, Chen N, Chiappini MG, Di Girolamo M, Grosso A, Muzi L, Panetta V, Khafizova E, Kozlovskaya N, Bobrova L, Bobkova I, Avdonin P, Gluhovschi C, Gluhovschi G, Potencz E, Lazar E, Trandafirescu V, Petrica L, Velciov S, Bozdog G, Bob F, Gadalean F, Vernic C, Cioca D, Ito M, Kimachi M, Nishio S, Koike T, Choi H, Cho AJ, Jang HR, Lee JE, Huh W, Kim DJ, Oh HY, Kim YG. Clinical Nephrology: primary and secondary glomerulonephritis. Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.35] [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: 11/13/2022] Open
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Abstract
OBJECTIVE The aim of the study was to determine the efficacy of uterine artery embolisation (UAE) combined with local methotrexate (MTX) for the treatment of caesarean scar pregnancy, compared with other traditional modalities, and to investigate the complications associated with this treatment. DESIGN A retrospective cohort study. SETTING A large obstetrics and gynaecology unit within a university hospital in China. SAMPLE Women who were diagnosed with a caesarean scar pregnancy between January 2003 and December 2008, and who had informative case records, were included in the study. METHODS We reviewed the results for all women who received one of three treatments: dilation and curettage (D&C) (11 patients; group A), systemic MTX (17 patients; group B), and UAE and local MTX (38 patients; group C). MAIN OUTCOME MEASURES The main outcome measures were success rate, blood loss, time for beta human chorionic gonadotrophin (beta-hCG) to decline to normal values, and the duration of hospital stay. Success was defined as a complete recovery with no severe complications and with the preservation of fertility. RESULTS A total of 66 women diagnosed with caesarean scar pregnancy between January 2003 and December 2008 were identified, and their data were analysed. The success rate in group C was significantly higher than that in groups A and B after adjusting for beta-hCG level (89.5 versus 27.3 and 58.8%, respectively; P < 0.001). The mean blood loss in group C was lower than in the other two groups (240.5 versus 855.5 and 639.4 ml, respectively; P = 0.008 and 0.009, respectively). The average time for beta-hCG to decline to normal values was significantly shorter in group C than in group B (28.1 versus 44.3 days; P = 0.021). A significantly shorter duration of hospital stay was observed in group C compared with group B (12.5 versus 22.0 days; P = 0.024). CONCLUSIONS UAE combined with local MTX is of benefit to women wishing to preserve fertility, and is suitable for use as the primary treatment for caesarean scar pregnancy.
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Affiliation(s)
- X-Y Yang
- Department of Obstetrics and Gynaecology, West China Second University Hospital, Sichuan University, Chengdu, China
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Affiliation(s)
- X-Y Yang
- Department of Obstetrics and Gynaecology, West China Second University Hospital, Sichuan University, Chengdu, China
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Wang H, Xi M, Zhang J, Chen Y, Zheng A. O987 Analysis of clinic staging and lymph-nodes metastasis in 508 patients of cervical cancer. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)61360-6] [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: 10/20/2022]
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Zheng A, Sakari R, Cheng SM, Hietikko A, Moilanen P, Timonen J, Fagerlund KM, Kärkkäinen M, Alèn M, Cheng S. Effects of a low-frequency sound wave therapy programme on functional capacity, blood circulation and bone metabolism in frail old men and women. Clin Rehabil 2009; 23:897-908. [DOI: 10.1177/0269215509337273] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Objective: To evaluate the effects of a low-frequency sound wave therapy programme on functional capacity, blood circulation and bone metabolism of the frail elderly. Design: Single-blind, randomized, controlled trial. Setting: Two senior service centres. Subjects: Forty-nine volunteers (14 males and 35 females) aged 62—93 years with up to 12 diagnosed diseases were allocated in either the intervention group (n = 30) or control group (n = 19). Intervention: The intervention group underwent sound wave therapy, 3—5 times a week for 30 minutes per session over a period of 6 months. The control group received no intervention. Main measurements: Blood pressure, functional capacity, mobility, bone density, biochemical markers, isometric muscle strength, balance, and skin surface temperature. Results: Compared with the control group, the intervention group’s mobility and the amount of self-reported kilometres walked per week increased by 3 km (P<0.05), while levels of cholesterol (4.97 (0.72) to 4.52 (0.65) mmol/L, P =0.019), low-density lipoprotein (2.82 (0.72) to 2.45 (0.61) mmol/L, P =0.022), bone markers of total osteocalcin (11.0 (6.5) to 10.3 (5.9) ng/mL, P =0.048)) and tartrate-resistant acid phosphatase isoform 5b (2.50 (1.0) to 2.41 (1.1) IU/L, P =0.021)) decreased. The average skin surface temperature was significantly higher during active sessions at the end of the intervention than in the beginning (P = 0.004). No change was found during placebo sessions. Conclusions: Low-frequency sound wave therapy may have the potential to promote well-being of frail elderly subjects via improved functional capacity, especially in subjects who are too frail to undertake exercise.
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Affiliation(s)
- A. Zheng
- Department of Health Sciences, University of Jyväskylä, Jyväskylä
| | - R. Sakari
- Department of Health Sciences, University of Jyväskylä, Jyväskylä
| | - SM Cheng
- Department of Health Sciences, University of Jyväskylä, Jyväskylä,
| | - A. Hietikko
- Department of Health Sciences, University of Jyväskylä, Jyväskylä
| | - P. Moilanen
- Department of Physics, University of Jyväskylä, Jyväskylä
| | - J. Timonen
- Department of Physics, University of Jyväskylä, Jyväskylä
| | - KM Fagerlund
- Department of Cell Biology and Anatomy, University of Turku, Turku
| | - M. Kärkkäinen
- Department of Health Sciences, University of Jyväskylä
| | - M. Alèn
- Department of Medical Rehabilitation, Oulu University Hospital and Institute of Health Sciences, University of Oulu, Oulu
| | - S. Cheng
- Department of Health Sciences, University of Jyväskylä, Jyväskylä, Department of Orthopaedics and Traumatology, Kuopio University Hospital, Kuopio, Finland
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Pakstis LM, Dunkers JP, Zheng A, Vorburger TV, Quinn TP, Cicerone MT. Evaluation of polydimethylsiloxane modification methods for cell response. J Biomed Mater Res A 2009; 92:604-14. [PMID: 19235219 DOI: 10.1002/jbm.a.32402] [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: 11/05/2022]
Abstract
Many methods exist in the literature to modify surfaces with extracellular matrix (ECM) proteins prior to cell seeding. However, there are few studies that systematically characterize and compare surface properties and cell response results among modification methods that use different bonding mechanisms. In this work, we compare cell response and physical characterization results from fibronectin or laminin attached to polydimethylsiloxane (PDMS) elastomer surfaces by physical adsorption, chemisorption, and covalent attachment to determine the best method to modify a deformable surface. We evaluate modification methods based on completeness and uniformity of coverage, surface roughness, and hydrophilicity of attached ECM protein. Smooth muscle cell adhesion, proliferation, morphology, and phenotype were also evaluated. We found that chemisorption methods resulted in higher amounts of protein attachment than physical adsorption and covalent bonding of the ECM proteins. Cell response to protein-modified surfaces was similar with respect to cell adhesion, area, aspect ratio, and phenotype. When all the data are considered, the chemisorption methods, most notably silane_70, provide the best surface properties and highest cell proliferation.
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Affiliation(s)
- L M Pakstis
- Polymers Division, Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
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Abstract
Tamoxifen (Tam) is widely used in chemotherapy of estrogen receptor-positive breast cancer. It inhibits proliferation and induces apoptosis of breast cancer cells by estrogen receptor-dependent modulation of gene expression, but recent reports have shown that Tam (especially at pharmacological concentrations) has also rapid nongenomic effects. Here we studied the mechanisms by which Tam exerts rapid effects on breast cancer cell viability. In serum-free medium 5-7 microM Tam induced death of MCF-7 and MDA-MB-231 cells in a time-dependent manner in less than 60 min. This was associated with release of mitochondrial cytochrome c, a decrease of mitochondrial membrane potential and an increase in production of reactive oxygen species (ROS). This suggests that disruption of mitochondrial function has a primary role in the acute death response of the cells. Accordingly, bongkrekic acid, an inhibitor of mitochondrial permeability transition, was able to protect MCF-7 cells against Tam. Rapid cell death induction by Tam was not associated with immediate activation of caspase-9 or cleavage of poly (ADP-ribose) polymerase. It was not blocked by the caspase inhibitor z-Val-Ala-Asp-fluoromethylketone either. Diphenylene ionodium (DPI), an inhibitor of NADPH oxidase, was able to prevent Tam-induced cell death but not cytochrome c release, which suggests that ROS act distal to cytochrome c. The pure antiestrogen ICI 182780 (1 microM) could partly oppose the effect of Tam in estrogen receptor positive MCF-7 cells, but not in estrogen receptor negative MDA-MB-231 cells. Pre-culturing MCF-7 cells in the absence of 17beta-estradiol (E(2)) or in the presence of a low Tam concentration (1 microM) made the cells even more susceptible to rapid death induction by 5 or 7 microM Tam. This effect was associated with decreased levels of the anti-apoptotic proteins Bcl-X(L) and Bcl-2. In conclusion, our results demonstrate induction of a rapid mitochondrial cell death program in breast cancer cells at pharmacological concentrations of Tam, which are achievable in tumor tissue of Tam-treated breast cancer patients. These mechanisms may contribute to the ability of Tam therapy to induce death of breast cancer cells.
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Affiliation(s)
- A Kallio
- Department of Anatomy and Medicity Research Laboratory, Institute of Biomedicine, University of Turku, Tykistökatu 6A, 20520 Turku, Finland.
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Gao J, Zheng A, Chen W, Peng Z, Cao Z. [A study of prognostic factors of stage IV epithelial ovarian cancer]. Hua Xi Yi Ke Da Xue Xue Bao 2001; 32:309-12. [PMID: 12600118] [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: 03/01/2023]
Abstract
OBJECTIVE To determine the effects of treatments for stage IV epidermal ovarian cancer and detect the prognostic factors. METHODS 31 cases primarily treated in our hospital from 1990 to 1998 were analyzed retrospectively. RESULTS Univariate analysis showed that the number of courses of chemotherapy, the size of residual disease, the histologic cell type, and the metastatic site were the significant prognostic factors(P < 0.05). Cox proportional hazard model confirmed that two factors (the size of residual lesion < or = 2 cm and the cycles of chemotherapy > or = 8 decreased the death odds ratio by 0.28 and 0.72 respectively. Three factors (lack of operation, presence of supraclavicular lymph node involvement and liver involvement) increased the death odds ratio by 14.25 times, 11.44 times and 1.85 times respectively (P < 0.05). CONCLUSION Surgical debulking, aggressive and appropriate chemotherapy are important measures to improve survival rate for patients with stage IV epithelial ovarian cancer.
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Affiliation(s)
- J Gao
- Department of Obstetrics and Gynecology, Second Affiliated Hospital, WCUMS, Chengdu 610041, China
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Shen W, Zhang R, Shen Y, Zhang J, Zhang D, Zhang X, Zheng A. Optimal timing of coronary stenting in unstable angina patients. Chin Med J (Engl) 2001; 114:59-61. [PMID: 11779437] [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] [Indexed: 02/23/2023] Open
Abstract
OBJECTIVE To assess the efficacy and safety of intracoronary stenting in the acute phase of unstable angina pectoris (UAP). METHODS Fifty-five patients with UAP were randomized to early (Group I, n = 29) and delayed interventional treatment (Group II, n = 26). Coronary angiography and stenting were performed within 48 hours in Group I and 7-10 days later in Group II. Procedural success rate, time interval from admission to angina relief and duration of hospitalization were recorded. Cardiac events within 30 days were observed as well. RESULTS Clinical characteristics and angiographic features were similar between the two groups. There was no significant difference in the procedural success rate (93% versus 96%), but the cardiac event rate within 30 days was significantly lower in Group I than in Group II (0% versus 9.2%, P < 0.05). The time interval from admission to angina relief (4.4 +/- 3.1 days versus 5.7 +/- 2.9 days) and the duration of hospitalization (8.8 +/- 3.2 days versus 13.5 +/- 3.1 days) were significantly reduced in Group I (both P < 0.05). CONCLUSIONS Intracoronary stent implantation is effective and safe in the acute phase of UAP. Early percutaneous coronary intervention results in rapid improvement in symptomatology and a shorter hospitalization. Its long-term effect has to be confirmed in a future randomized study.
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Affiliation(s)
- W Shen
- Department of Cardiology, Ruijin Hospital, Shanghai Second Medical University, Shanghai 200025, China
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Zheng A, Mäntymaa P, Säily M, Savolainen E, Vähäkangas K, Koistinen P. p53 pathway in apoptosis induced by all-trans-retinoic acid in acute myeloblastic leukaemia cells. Acta Haematol 2000; 103:135-43. [PMID: 10940651 DOI: 10.1159/000041036] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [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: 11/19/2022]
Abstract
The role of the p53 pathway in apoptosis induced by all-trans-retinoic acid (ATRA) was studied in 5 human acute myeloid leukaemia (AML) cell lines, OU-AML-3, -4, -5, -7 and -8, previously established and characterized by the authors. Although all the cell lines have a wild-type (wt) p53 gene, the protein is in a mutant conformation detectable by the anti-p53 antibody PAb 240. Exposure of the cell lines to 1.0 microM ATRA for 72 h caused induction of apoptosis detectable by morphology and the annexin V assay. The number of apoptotic cells according to the annexin V assay varied from 16 +/- 8% (OU-AML-7) to 61 +/- 4% (OU-AML-3) in ATRA-treated cells, while it was 7 +/- 6% in control cells. Western blotting and flow cytometry showed down-regulation of the p53 protein by ATRA. The conformation of p53 remained unchanged, being detectable in flow cytometry by PAb 240, but not by PAb 1620 (an antibody which only detects p53 in wt conformation). At the same time bcl-2 was down-regulated as shown by Western blotting and flow cytometry, while no induction of bax was observed by ATRA. On the basis of these results, ATRA-induced apoptosis in these AML cell lines is independent of the p53 pathway, although it is associated with the down-regulation of bcl-2.
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Affiliation(s)
- A Zheng
- Department of Internal Medicine, University of Oulu, Oulu, Finland
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Shen W, Lu A, Zhang J, Zhang D, Zhang X, Zheng A. Direct coronary stenting in acute myocardial infarction. Chin Med Sci J 2000; 15:149. [PMID: 12903772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Affiliation(s)
- W Shen
- Department of Cardiology, Rui Jin Hospital, Shanghai Second Medical University, Shanghai 200025
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Zheng A, Peng Z, Cao Z. [Relationship between vulvar dystrophy, malignant tumor and the estrogen progestin receptor]. Hua Xi Yi Ke Da Xue Xue Bao 2000; 31:248-9, 252. [PMID: 12515151] [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: 02/28/2023]
Abstract
In order to investigate the relationship between vulvar dystrophy, malignant tumor, and estrogen, progestin receptor, we made an analysis on estrogen and progestin receptor (ER, PR) contents in 31 cases of vulvar dystrophy and 19 cases of malignant tumor, using the dextran-coated charcoal method. The Results showed that ER content of the mixed type was higher than that of the atrophic type. PR content of the mixed type was higher than that of the hyperplastic type; and the PR content of the hyperplastic type was higher than that of the atrophic type. The relationship between ER and PR contents of the vulvar dystrophy and adjacent normal tissue was in positive correlation. The PR content of vulvar squamous cell carcinoma went down along with the drop of its dedifferentiation degree. The PR content of carcinoma was much lower than that of the adjacent normal tissue. The results of suggest that the study provided theoretic basis for endocrinotherapy of the vulvar dystrophy, PR in malignant tumor is regarded as one of the indexes to predict prognosis.
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Affiliation(s)
- A Zheng
- Department of Obstetrics and Gynecology, Second Affiliated Hospital, WCUMS, Chengdu 610041
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Shan D, Zheng A, Ballard CE, Wang W, Borchardt RT, Wang B. A facilitated cyclic ether formation and its potential application in solid-phase peptide and organic synthesis. Chem Pharm Bull (Tokyo) 2000; 48:238-44. [PMID: 10705512 DOI: 10.1248/cpb.48.238] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A "trimethyl lock" system has been known to facilitate lactonization reactions through what has been termed a stereopopulation control mechanism. We have found that a similar trimethyl lock system can also facilitate cyclic ether formation with the concomitant release of a carboxylic acid in the presence of anhydrous tetrabutylammonium fluoride. To study this base-mediated trimethyl lock-facilitated cyclic ether formation, we synthesized fifteen model compounds. All model compounds underwent base-mediated cyclic ether formation in high yields at 0 degree C to room temperature (r.t.) with the concomitant release of the attached carboxylate. Such a system potentially could be used for the development of a two-dimensional linker for solid phase peptide and organic synthesis.
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Affiliation(s)
- D Shan
- Department of Chemistry, North Carolina State University, Raleigh 27695-8204, USA
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Zheng A, Mäntymaa P, Säily M, Siitonen T, Savolainen ER, Koistinen P. An association between mitochondrial function and all-trans retinoic acid-induced apoptosis in acute myeloblastic leukaemia cells. Br J Haematol 1999; 105:215-24. [PMID: 10233386] [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] [Indexed: 02/12/2023]
Abstract
The present study investigated whether all-trans retinoic acid (ATRA)-induced apoptosis in acute myeloblastic leukaemia (AML) is related to changes in mitochondrial function. Two human AML cell lines, OU-AML-3 and OU-AML-7, known to be inducible to time-dependent apoptosis of varying degrees by ATRA, were used. Apoptosis induced by ATRA was shown to be a slow event. It was detected by the DNA electrophoretic method and cytofluorimetrical annexin V assay after 48 h exposure, and by morphology and polyADPribose polymerase (PARP) cleavage after 72 h exposure of AML cells to ATRA. The efflux of mitochondrial cytochrome c to cytosol was notable in Western blotting after 48 h exposure of the cells to ATRA and was observed before the drop in the mitochondrial membrane potential, which only took place after 72 h exposure, when measured by flow cytometry and a JC-1 probe. The apoptotic events in mitochondria were more evident in the OU-AML-3 than the OU-AML-7 cell line. This might relate to the different bcl-2 contents of the cell lines: the basic bcl-2 levels of the OU-AML-7 cell line were almost twofold compared to that of the OU-AML-3 cell line, as analysed by the ELISA method. However, both of the cell lines showed progressive down-regulation of bcl-2, which began after 12-24 h exposure of the cells to ATRA as determined by ELISA, Western blotting and flow cytometry. The present results show that mitochondria have a role in ATRA-induced apoptosis in AML cells and down-regulation of bcl-2 is related to it. In view of the previously published studies, the present results underline the fact that the timing of apoptotic events, such as fragmentation of DNA, externalization of phosphatidylserine, cytochrome c efflux, change in mitochondrial membrane potential and cleavage of PARP, are, to a notable extent, cell type and inducer-dependent.
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Affiliation(s)
- A Zheng
- Departments of Internal Medicine; Clinical Chemistry, University of Oulu, Oulu, Finland
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Abstract
We analysed the status of the p53 gene and protein in eight newly established acute myeloid leukaemia (AML) cell lines representing blast cells of either de novo leukaemia patients in first remission or patients with relapsed and chemotherapy-resistant disease causing their death. There were no mutations in the p53 gene in any of the cell lines as analysed by single-strand conformation polymorphism of amplified exons 5-8. However, the p53 protein was clearly and consistently expressed in all of these cell lines, as shown by immunohistochemistry, Western blotting and flow cytometry. The consistently expressed p53 protein was located in both the nucleus and the cytoplasm of all the cell lines and, as shown by flow cytometry, it was mostly in a conformation typical of the mutated protein. These AML cell lines offer a tool for studying the production and function of the p53 protein and its possible role in cell cycle regulation and chemoresistance as well as in the regulation of apoptosis in AML.
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Affiliation(s)
- A Zheng
- Department of Clinical Chemistry, University of Oulu, Finland
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Shen W, Zhang R, Zhang J, Zhang D, Zhang X, Zheng A. A comparative study on the effects of low dose of tPA and different regimens of intravenous urokinase in acute myocardial infarction. Chin Med J (Engl) 1999; 112:18-21. [PMID: 11593632] [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] [Indexed: 02/21/2023] Open
Abstract
OBJECTIVE To compare the effects of low dose of recombinant tissue-type plasminogen activator (tPA) with those of conventional dose of urokinase (UK) and assess the influence of different regimens of intravenous UK in patients with acute myocardial infarction (AMI). METHODS Eighty patients with AMI were randomized to 50 mg of tPA (Group I; n = 26) using an accelerating approach or 1.0-1.5 million U of UK (Group II; n = 54). UK was administered as a single bolus injection of whole dose (Group IIa; n = 26) or half dose bolus injection followed by half dose infusion (Group IIb; n = 28). All patients underwent coronary arteriography 90 min after the initiation of intravenous thrombolysis, and the infarct-related coronary artery (IRA) patency was evaluated. Cardiac events during hospitalization were recorded and predischarge left ventricular function was determined by two-dimensional echocardiography. RESULTS The IRA patency rate was significantly higher in Group I (88.4%) than in Group II (53.7%) (P < 0.01). Group I patients had less cardiac events during hospitalization (11.5% vs 33.3%) and greater improvement in left ventricular function than Group II patients. However, these angiographic, left ventricular functional and prognostic parameters did not significantly differ between Group IIa and Group IIb. CONCLUSIONS Thrombolysis after AMI with low dose of intravenous tPA exerts better angiographic and clinical effects than that with conventional dose of UK. The thrombolytic effects of UK were not affected by different regimens of intravenous administration of the agent.
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Affiliation(s)
- W Shen
- Department of Cardiology, Rui Jin Hospital, Shanghai Second Medical University, Shanghai 200025, China
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Säily M, Koistinen P, Pulkki K, Zheng A, Savolainen ER. Acute myeloblastic leukaemia cells produce soluble interleukin 6 receptor by a mechanism of alternative splicing. Cytokine 1998; 10:860-7. [PMID: 10025979 DOI: 10.1016/s1043-4666(98)90003-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [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: 11/18/2022]
Abstract
The aim of the present work was to investigate whether acute myeloblastic leukaemia (AML) blast cells express a soluble (s) form of interleukin 6 (IL-6) receptor (R), and if they do, what is the mechanism of production. Eight AML patient cell lines and 25 primary AML blast cell samples were investigated. The cell lines secreted high quantities of sIL-6R into their culture medium when examined by enzyme-linked immunosorbent assay (ELISA). To determine whether sIL-6R is synthesized by a mechanism of alternative splicing, RNA was analysed from all the AML blast cell samples by using reverse transcription polymerase chain reaction. In this method, primer sites flanking the transmembrane domain were utilized and the alternatively spliced IL-6R mRNA was distinguished from the non-spliced transcript form by size. All the cell lines and 64% of the primary blast cell samples expressed the alternatively spliced IL-6R mRNA. To confirm the phenomenon of alternative splicing at protein level, cytoplasmic protein fractions of the cell lines were investigated by using a sensitive adaptation of the Western blot method. All the cell lines expressed two IL-6R proteins sized 80 and 50 kDa and corresponding to the membraneous and soluble forms of IL-6R, respectively. In conclusion, the results obtained at both mRNA and protein levels strongly support alternative splicing as a mechanism of sIL-6R production in AML. Because sIL-6R modulates the effects of IL-6 on target cells, differences in sIL-6R expression levels may partially explain the previously observed diversity in IL-6-induced growth responses in AML
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Affiliation(s)
- M Säily
- Department of Clinical Chemistry, University of Oulu, Finland
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