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Yang MQ, Sun MJ, Zhang HJ. Mucosal esophageal carcinoma following endoscopic submucosal dissection with giant gastric metastasis: A case report and review of literature. World J Gastroenterol 2023; 29:5935-5944. [PMID: 38111508 PMCID: PMC10725560 DOI: 10.3748/wjg.v29.i44.5935] [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] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/15/2023] [Accepted: 11/14/2023] [Indexed: 11/27/2023] Open
Abstract
BACKGROUND Esophageal carcinoma is a highly aggressive digestive cancer responsible for a notable proportion of cancer-related deaths worldwide. Its elevated metastatic rate contributes to a poor prognosis in affected patients. In this case review, we aim to summarize the metastatic characteristics of intramural gastric metastasis (IGM) in mucosal esophageal squamous carcinoma. CASE SUMMARY A 56-year-old man was admitted to our hospital because of a dry cough with an esophageal sensation for one year. Endoscopic examination revealed a 2.0 cm 1.0 cm, superficial esophageal squamous cell carcinoma, and the patient underwent endoscopic submucosal dissection (ESD). Fifteen months after ESD, positron emission tomography/computed tomography revealed that the metabolism of the stomach cardia wall had increased slightly. However, the mucosa of the gastric cardia was smooth under gastroendoscopy. Two years after ESD, endoscopic examination revealed a giant gastric cardia carcinoma, while the esophageal mucosa was smooth, and no advanced cancer was found. A biopsy of the gastric cardia indicated squamous-cell carcinoma. The patient received immunochemotherapy and radiotherapy for esophageal cancer for 8 mo and is currently under follow-up. CONCLUSION Early-stage esophageal carcinoma with IGM is rare. Despite the ESD of the primary lesion, IGM may still occur and should be closely monitored after ESD.
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Affiliation(s)
- Mei-Qi Yang
- Department of Gastroenterology, The First Hospital of China Medical University, Shenyang 110000, Liaoning Province, China
| | - Ming-Jun Sun
- Department of Endoscopy, The First Affiliated Hospital of China Medical University, Shenyang 110000, Liaoning Province, China
| | - Hui-Jing Zhang
- Department of Gastroenterology, The First Hospital of China Medical University, Shenyang 110000, Liaoning Province, China
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Li D, Yang L, Wang Y, Sui JD, Liu YC, Yang MQ. Eosinophil Dynamics during Chemo-Radiation Correlate to Clinical Outcome in Stage II-IVA Nasopharyngeal Carcinoma Patients: Results from a Large Cohort Study. Int J Radiat Oncol Biol Phys 2023; 117:e596. [PMID: 37785801 DOI: 10.1016/j.ijrobp.2023.06.1952] [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: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) We investigated the dynamics of eosinophil depletion and recovery during definitive concurrent chemo-radiotherapy (CCRT) and how they affect the prognosis of stage II-IVA nasopharyngeal carcinoma (NPC) patients. MATERIALS/METHODS A total of 1225 patients with pathologically proven NPC from 2013 to 2019 were enrolled. Fuzzy C-Means Clustering (FCM) was used to assess trends in eosinophil during CCRT longitudinally and to grade eosinophil decline during treatment in combination with absolute eosinophil counts (AECs) at the end of CCRT. Grade G0 refers to patients with no decreasing trend in eosinophils and AECs >0.05×109 cells/L, grade G1 refers to patients with a decreasing trend in eosinophils or AECs between 0-0.05×109 cells/L, grade G2 refers to patients with a decreasing trend in eosinophils and AECs between 0-0.05×109 cells/L. Progression-free survival (PFS) is the primary outcome measure, with overall survival (OS), distant metastasis-free survival (DMFS), and local recurrence-free survival (LRFS) as secondary outcome measures. A Cox proportional risk model was used to determine the hazard ratio for adverse prognostic effects in declining grades of eosinophil. RESULTS During a median follow-up of 4.1 years, 376 (30.69%) patients experienced disease progression events. The grade of eosinophil reduction after CCRT was significantly associated with PFS, OS, and DMFS but not with LRFS. After adjusting for demographics, clinical baseline indicators, tumor characteristics, and treatment characteristics, a 1.57-fold (p = 0.001), 1.69-fold (p = 0.007), and 1.51-fold (p = 0.019) increase in the risk of developing PFS, OS, and DMFS was observed for G1 compared with G0, whereas a 2.4-fold (p < 0.001), 2.76-fold (p < 0.001), and 2.31-fold (p < 0.001) increase in the risk of developing PFS, OS, and DMFS was observed for G2. Moreover, among patients with G0, treatment with CCRT with a cumulative dose of platinum-based chemotherapy < 200 mg/m2 resulted in PFS, OS, and DMFS that were not inferior to CCRT with cumulative doses ≥ 200 mg/m2. CONCLUSION Eosinophil is an easily detectable and inexpensive biomarker that may be useful in the clinical setting to aid in assessing the prognosis for standard treatment of NPC.
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Affiliation(s)
- D Li
- School of Medicine, Chongqing University, Chongqing, China
| | - L Yang
- Radiation Oncology Center, Chongqing University Cancer Hospital, Chongqing, Chongqing, China
| | - Y Wang
- Radiation Oncology Center, Chongqing University Cancer Hospital, Chongqing, China
| | - J D Sui
- Radiation Oncology Center, Chongqing University Cancer Hospital, Chongqing, China
| | - Y C Liu
- College of Bioengineering, Chongqing University, Chongqing, China, China
| | - M Q Yang
- Chongqing University Cancer Hospital, Chongqing, China
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Li SY, Yang MQ, Liu YM, Sun MJ, Zhang HJ. Endoscopic and pathological characteristics of de novo colorectal cancer: Retrospective cohort study. World J Gastroenterol 2023; 29:2836-2849. [PMID: 37274065 PMCID: PMC10237105 DOI: 10.3748/wjg.v29.i18.2836] [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] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/14/2023] [Accepted: 04/19/2023] [Indexed: 05/11/2023] Open
Abstract
BACKGROUND Endoscopy has rapidly developed in recent years and has enabled further investigation into the origin and features of intestinal tumors. The small size and concealed position of these tumors make it difficult to distinguish them from nonneoplastic polyps and carcinoma in adenoma (CIA). The invasive depth and metastatic potential determine the operation regimen, which in turn affects the overall survival and distant prognosis. The previous studies have confirmed the malignant features and clinicopathological features of de novo colorectal cancer (CRC).
AIM To provide assistance for diagnosis and treatment, but the lack of a summary of endoscopic features and assessment of risk factors that differ from the CIA prompted us to conduct this retrospective study.
METHODS In total, 167 patients with small-sized CRCs diagnosed by endoscopy were reviewed. The patients diagnosed as advanced CRCs and other malignant cancers or chronic diseases that could affect distant outcomes were excluded. After screening, 63 cases were excluded, including 33 de novo and 30 CIA cases. Patient information, including their follow-up information, was obtained from an electronic His-system. The characteristics between two group and risk factors for invasion depth were analyzed with SPSS 25.0 software.
RESULTS Nearly half of the de novo CRCs were smaller than 1 cm (n = 16, 48.5%) and the majority were located in the distal colon (n = 26, 78.8%). The IIc type was the most common macroscopic type of de novo CRC. In a Pearson analysis, the differential degree, Sano, JNET, and Kudo types, surrounding mucosa, and chicken skin mucosa (CSM) were correlated with the invasion depth (P < 0.001). CSM was a significant risk factor for deep invasion and disturbed judgment of endoscopic ultrasound. A high degree of tumor budding and tumor-infiltrating lymphocytes are accompanied by malignancy. Finally, de novo CRCs have worse outcomes than CIA CRCs.
CONCLUSION This is the first comprehensive study to analyze the features of de novo CRCs to distinguish them from nonneoplastic polyps. It is also the first study paying attention to CSM invasive depth measurement. This study emphasizes the high metastatic potential of de novo CRCs and highlights the need for more research on this tumor type.
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Affiliation(s)
- Shi-Yang Li
- Department of Endoscopy, The First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China
| | - Mei-Qi Yang
- Department of Endoscopy, The First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China
| | - Yi-Ming Liu
- Department of Endoscopy, The First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China
| | - Ming-Jun Sun
- Department of Endoscopy, The First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China
| | - Hui-Jing Zhang
- Department of Endoscopy, The First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China
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Luo X, Zhang WF, Yang L, Qian EF, Yang MQ, Zhang H, Ji JY, Huang J. [Polymorphism and Forensic Application of 11 Y-SNP in Guizhou Shui Ethnic Group]. Fa Yi Xue Za Zhi 2021; 36:791-796. [PMID: 33550727 DOI: 10.12116/j.issn.1004-5619.2020.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Indexed: 11/30/2022]
Abstract
Abstract Objective To investigate the frequency distribution features of 11 Y-SNP of Guizhou Shui ethnic group, explore its genetic relationship with other ethnic groups and evaluate its forensic application value. Methods Multiplex amplification of the 11 Y-SNP of samples of 180 unrelated male individuals from Guizhou Shui ethnic group was performed with microsequencing technique. The frequency of haplogroup was calculated by direct counting method, and principal component analysis (PCA) of Guizhou Shui ethnic group and reference ethnic groups was performed by using Multi-variate statistical package (MVSP). The Fst genetic distance between Guizhou Shui ethnic group and other ethnic groups was calculated with Arlequin v3.5. The phylogenetic tree was established with MEGA 4.0 software according to the Fst value. Results Six types of Y chromosome haplogroups were observed in total. Among which, the distribution frequency of O-M175 haplogroup was the highest (71.11%), followed by C-M130 (25.00%), and D-M174 (3.89%). O1b-M268 (31.11%) and O2a2-IMS-JST021354 (28.33%) had a relatively high distribution frequency in O haplogroup. The paternal relationship between Guizhou Shui ethnic group and Guizhou Gelao ethnic group in the same language group was the closest. Conclusion The distribution of Y-SNP haplogroup of the Shui ethnic group in Guizhou has certain specificity, which can provide basic data for forensic biogeographic inference.
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Affiliation(s)
- X Luo
- School of Forensic Medicine, Guizhou Medical University, Guiyang 550004, China
| | - W F Zhang
- School of Forensic Medicine, Guizhou Medical University, Guiyang 550004, China
| | - L Yang
- School of Forensic Medicine, Guizhou Medical University, Guiyang 550004, China
| | - E F Qian
- School of Forensic Medicine, Guizhou Medical University, Guiyang 550004, China
| | - M Q Yang
- School of Forensic Medicine, Guizhou Medical University, Guiyang 550004, China
| | - H Zhang
- School of Forensic Medicine, Guizhou Medical University, Guiyang 550004, China
| | - J Y Ji
- School of Forensic Medicine, Guizhou Medical University, Guiyang 550004, China
| | - J Huang
- School of Forensic Medicine, Guizhou Medical University, Guiyang 550004, China
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Zhu YY, Yao Y, Souman JL, Yang MQ, Zhou GF. 0210 Effects of Artificial Dawn on Sleep Inertia in Alertness, Mood, and Cognitive Performance in Healthy Participants. Sleep 2018. [DOI: 10.1093/sleep/zsy061.209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Y Y Zhu
- School of Psychology, South China Normal University, Guangzhou, CHINA
| | - Y Yao
- School of Psychology, South China Normal University, Guangzhou, CHINA
| | - J L Souman
- Philips Lighting Research, Eindhoven, NETHERLANDS
| | - M Q Yang
- School of Psychology, South China Normal University, Guangzhou, CHINA
| | - G F Zhou
- South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, CHINA
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Zhu YY, Souman JL, Yang MQ, Zhou GF. 0165 Effects of Dusk Simulation on Norcturnal Sleep and Morning Sleep Inertia in Young Adults. Sleep 2018. [DOI: 10.1093/sleep/zsy061.164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Y Y Zhu
- School of Psychology, South China Normal University, Guangzhou, CHINA
| | - J L Souman
- Philips Lighting Research, Eindhoven, NETHERLANDS
| | - M Q Yang
- School of Psychology, South China Normal University, Guangzhou, CHINA
| | - G F Zhou
- South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, CHINA
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Yang MQ, Yang CM, Zhu Y, Chen QW, Mao TX, Hsiao FC, Su YC, Yao Y, Dong QL, Luo LX, Ji YR, Wang YY, Zhou GF. 0145 The Acute Effects of Intermittent Light Exposure in The Evening on Alertness and Subsequent Sleep Architecture. Sleep 2018. [DOI: 10.1093/sleep/zsy061.144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- M Q Yang
- School of Psychology, South China Normal University, Guangzhou, CHINA
| | - C M Yang
- Department of Psychology, National Chengchi University, Taipei, TAIWAN
| | - Yy Zhu
- School of Psychology, South China Normal University, Guangzhou, CHINA
| | - Q W Chen
- School of Psychology, South China Normal University, Guangzhou, CHINA
| | - T X Mao
- School of Psychology, South China Normal University, Guangzhou, CHINA
| | - F C Hsiao
- Department of Psychology, National Chengchi University, Taipei, TAIWAN
| | - Y C Su
- Department of Psychology, National Chengchi University, Taipei, CHINA
| | - Y Yao
- School of Psychology, South China Normal University, Guangzhou, CHINA
| | - Q L Dong
- School of Psychology, South China Normal University, Guangzhou, CHINA
| | - L X Luo
- School of Psychology, South China Normal University, Guangzhou, CHINA
| | - Y R Ji
- School of Psychology, South China Normal University, Guangzhou, CHINA
| | - Y Y Wang
- School of Psychology, South China Normal University, Guangzhou, CHINA
| | - G F Zhou
- National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou, CHINA
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Zhang FR, Zhang RQ, He L, Yin JW, Yang MQ. Multidisciplinary management to decrease perioperative complications in senile patients with hypoxaemia in high altitudes during primary hip arthroplasty: data from our cohort study. Br J Anaesth 2016; 117:828-829. [PMID: 27956686 DOI: 10.1093/bja/aew369] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yang J, Yang MQ. SU-FF-I-55: Data Mining and Knowledge Discovery Methodology Development Using Predicting Transmembrane Proteins by Synergy of Computational and Molecule Biophysics Approaches as An Example. Med Phys 2006. [DOI: 10.1118/1.2240295] [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: 11/07/2022] Open
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Yang MQ, Kjellén E, Håkansson CH, Palmegren M. The effect of ionizing irradiation on type I collagen of the tail in growing mice: a histology and electron microscopy study. Scanning Microsc 1998; 10:821-31; discussion 831-2. [PMID: 9813642] [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: 02/09/2023]
Abstract
In order to examine the effect of radiation on growing tissue, especially the fibroblasts and their end-product, the collagen fibres, tails from 24 mice were irradiated at an age of 8 days with 20 Gy and 30 Gy (60Co). Tails from 18 animals served as controls. Six mice from each group were sacrificed on day 8, 20 and 30. Transmission electron microscopy was used to examine the fibroblasts and the collagen fibrils. Non-irradiated fibroblasts had a nucleus rich in chromatin and an abundant endoplasmic reticulum with cisternae and condensing vacuoles. On day 20, approximately 50%, and on day 30, 25% of the fibroblasts irradiated with 30 Gy had a sparse endoplasmic reticulum pointing to a reduction of protein synthesis. While, on day 20, the fibrils irradiated with 20 Gy and with 30 Gy had significantly larger diameters compared to the controls, on day 30, the irradiated fibrils had a notably smaller diameter compared to the controls; 30 Gy-fibrils were larger than the 20 Gy-fibrils on both days. On day 20, the binding mean value of the 30 Gy-fibrils exceeded that of the controls and was significantly higher than that of the 20 Gy-fibrils, which was lower, though not significantly, than the controls. On day 30, the banding mean value of the 30 Gy-fibrils was notably lower than the control; and the value of the 20 Gy-fibrils was significantly lower than that of the 30 Gy-fibrils. The results are explained as an edema together with an inhibitory effect on the protein synthesis of the fibroblasts caused by the irradiation. This deduction is further supported by light microscopy of the tails.
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Affiliation(s)
- M Q Yang
- Department of Oncology, University Hospital, Lund, Sweden
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Huang WF, Yang MQ, Zeng J, Li LZ, Cheng GR. Differences in molar absorptivity of 4-NP with the reaction solution and apparatus affect ALP measurement. Rinsho Byori 1997; 45:1098-102. [PMID: 9396352] [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: 02/05/2023]
Abstract
We examined the differences in molar absorptivity of 4-NP obtained using different kits for ALP measurement and different instruments. The apparent molar absorptivity of 4-NP in the same reaction solution determined by six different instruments was 15.98, 16.72, 16.06, 17.00, 16.27, 17.62 and that using four different reaction solution kits for ALP with the same instrument was 16.90, 17.38, 17.72, 16.11. We measured ALP in three serum samples with six instruments using the same kit and in twelve serum samples with the same instrument using four kits. ALP activities measured using the same molar absorptivity value differed with the instrument(p < 0.01). However, those measured using the apparent molar absorptivity value for each instrument revealed no significant differences(p > 0.05). In conclusion, we suggest that standard material should be contained in each kit for enzyme measurement and the apparent epsilon for each kit and instrument should be obtained to minimize the systematic error caused by using the same epsilon in different laboratories.
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Affiliation(s)
- W F Huang
- Department of Clinical Laboratory of Sichuan Provincial People's Hospital, China
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Liu DL, Yang MQ, Eberhardt J, Persson B. Repeated immunotherapy using intratumoural injection with recombinant interleukin-2 and tumour-infiltrating lymphocytes inhibits growth of breast cancer and induces apoptosis of tumour cells. Cancer Lett 1996; 103:131-6. [PMID: 8635148 DOI: 10.1016/0304-3835(96)04195-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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: 02/01/2023]
Abstract
This study tested the effect of repeated intratumoural injection with recombinant interleukin-2 (rIL-2) and tumour-infiltrating lymphocytes (TILs) on inhibition of growth of breast cancer and on induction of apoptosis of tumour cells. The tumour cell line LDLX43 was used to induce breast cancer in Wistar rats. Group I (10 rats) was the control. Group II (12 rats) received repeated intratumoural injection with rIL-2 and TILs. rIL-2 at the dose of 5 x 10(5) IU/day was given for 7 days, and 1 x 10(7) TILs were injected on the second day of each rIL-2 therapy, for a treatment session. Overall, two treatment sessions of immunotherapy with rIL-2 and TILs were given in all treated animals. Rapid increased tumour volume was found in the control group. In the treated group the total response rate was 42%, of which 25% tumours showed partial regression and 17% tumours reached complete remission where infiltration of plenty of T lymphocytes was detected, indicating that T cell-mediated antitumour immunity is primarily responsible for tumour rejection. Further investigation showed the repeated immunotherapy using intratumoural injection with rIL-2 and TILs could induce the development of apoptosis of breast cancer cells.
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Affiliation(s)
- D L Liu
- Tumour Biology and Immunotherapy Program, Top Cancer Institute, Lund, Sweden
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Cwikiel M, Yang MQ, Albertsson M, Håkansson CH, Palmegren M. Scanning electron microscopy of human esophageal mucosa in patients with carcinoma of the esophagus. Scanning Microsc 1993; 7:933-41; discussion 942. [PMID: 8146620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Specimens taken at surgery from 15 patients with carcinoma of the esophagus were examined with scanning electron microscopy. Nine patients were treated with chemotherapy (cisplatin + 5-fluorouracil), surgery and radiotherapy; one received preoperative radiotherapy only; and the remaining five primary surgery only. Scanning electron microscopy was performed on specimens of both tumor tissue and the mucosa at least 5 cm from the tumor. In adjacent non-tumor tissue, damage due to treatment was observed in the form of changes in microridges and increased cell loss. In tumor tissue, the degree of damage was correlated to tumor response to treatment. For patients with no residual tumor after treatment, the ultrastructure was normalized with a low tumor score, while for patients with residual tumor, the score was high.
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Affiliation(s)
- M Cwikiel
- Department of Oncology, University of Lund, University Hospital, Sweden
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Kingsley PB, Sako EY, Yang MQ, Zimmer SD, Ugurbil K, Foker JE, From AH. Ischemic contracture begins when anaerobic glycolysis stops: a 31P-NMR study of isolated rat hearts. Am J Physiol 1991; 261:H469-78. [PMID: 1877673 DOI: 10.1152/ajpheart.1991.261.2.h469] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The relationships among myocardial ATP, intracellular pH, and ischemic contracture in Langendorff-perfused rat hearts were investigated by 31P nuclear magnetic resonance spectroscopy during total global normothermic ischemia while the left ventricular pressure was recorded continuously via an intraventricular balloon. Glucose-perfused hearts (n = 63) were divided into five groups based on the time of onset of contracture (TOC), and three other groups of hearts were treated to vary the ischemic glycogen availability. ATP levels, which showed no evidence of accelerated ATP depletion during contracture, were significant and variable at TOC. Intracellular pH initially declined and then leveled off at TOC, with lower final pH in hearts with later TOC. We conclude that contracture began when anaerobic glycolysis (and thus glycolytic ATP synthesis) stopped. These results, though consistent with the concept that ischemic contracture in normal hearts results from rigor bond formation due to low ATP levels at the myofibrils, suggest that TOC is more closely related to glycolytic ATP production than to total cellular ATP content, thus providing evidence of some degree of subcellular compartmentation or metabolite channeling. In glycolytically inhibited hearts, the quite early contracture may have a Ca2+ component.
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Affiliation(s)
- P B Kingsley
- Gray Freshwater Biological Institute, University of Minnesota, Navarre 55392
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Huang WF, Yang MQ, Peng KH, Li LZ, Chen FH, Liu H. Stable uric acid standard solution with glycerol, not formaldehyde. Clin Chem 1991; 37:1138. [PMID: 2049840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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16
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Yang MQ. [The value of the estimation of cerebrospinal fluid lysozyme(muramidase) activity in differential diagnosis of meningitis]. Zhonghua Nei Ke Za Zhi 1982; 21:677-9. [PMID: 7166071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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