1
|
Pyeon DB, Lee SE, Yoon JW, Park HJ, Park CO, Kim SH, Oh SH, Lee DG, Kim EY, Park SP. The antioxidant dieckol reduces damage of oxidative stress-exposed porcine oocytes and enhances subsequent parthenotes embryo development. Mol Reprod Dev 2021; 88:349-361. [PMID: 33843103 DOI: 10.1002/mrd.23466] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 07/08/2020] [Revised: 12/24/2020] [Indexed: 12/13/2022]
Abstract
This study investigated the effect of the antioxidant dieckol, a component of Ecklonia cava, on maturation and developmental competence of porcine oocytes exposed to oxidative stress in vitro. Oocytes were matured in in vitro maturation (IVM) medium containing various concentrations of dieckol. The blastocyst formation rate was highest in the 0.5 μM dieckol-treated (0.5 DEK) group. The reactive oxygen species level was decreased, and the level of glutathione and expression of antioxidant genes (NFE2L, SOD1, and SOD2) at metaphase II were increased in the 0.5 DEK group. Abnormal spindle organization and chromosome misalignment were prevented in the 0.5 DEK group. Expression of maternal markers (CCNB1 and MOS) and activity of p44/42 mitogen-activated protein kinase were increased in the 0.5 DEK group. After parthenogenetic activation, the total number of cells per blastocyst was increased and the percentage of apoptotic cells was decreased in the 0.5 DEK group. Expression of development-related genes (CX45, CDX2, POU5F1, and NANOG), antiapoptotic genes (BCL2L1 and BIRC5), and a proapoptotic gene (CASP3) were altered in the 0.5 DEK group. These results indicate that the antioxidant dieckol improves IVM and subsequent development of porcine oocytes and can be used to improve the quality of oocytes under peroxidation experimental conditions.
Collapse
Affiliation(s)
- Da-Bin Pyeon
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Jeju Province, Korea
- Stem Cell Research Center, Jeju National University, Jeju-si, Jeju Province, Korea
| | - Seung-Eun Lee
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Jeju Province, Korea
- Stem Cell Research Center, Jeju National University, Jeju-si, Jeju Province, Korea
| | - Jae-Wook Yoon
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Jeju Province, Korea
- Stem Cell Research Center, Jeju National University, Jeju-si, Jeju Province, Korea
| | - Hyo-Jin Park
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Jeju Province, Korea
- Stem Cell Research Center, Jeju National University, Jeju-si, Jeju Province, Korea
| | - Chan-Oh Park
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Jeju Province, Korea
- Stem Cell Research Center, Jeju National University, Jeju-si, Jeju Province, Korea
| | - So-Hee Kim
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Jeju Province, Korea
- Stem Cell Research Center, Jeju National University, Jeju-si, Jeju Province, Korea
| | - Seung-Hwan Oh
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Jeju Province, Korea
- Stem Cell Research Center, Jeju National University, Jeju-si, Jeju Province, Korea
| | - Do-Geon Lee
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Jeju Province, Korea
- Stem Cell Research Center, Jeju National University, Jeju-si, Jeju Province, Korea
| | - Eun-Young Kim
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Jeju Province, Korea
- Stem Cell Research Center, Jeju National University, Jeju-si, Jeju Province, Korea
- Mirae Cell Bio, Seoul, Korea
| | - Se-Pill Park
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Jeju Province, Korea
- Stem Cell Research Center, Jeju National University, Jeju-si, Jeju Province, Korea
- Mirae Cell Bio, Seoul, Korea
| |
Collapse
|
2
|
Yoon JW, Lee SE, Park YG, Kim WJ, Park HJ, Park CO, Kim SH, Oh SH, Lee DG, Pyeon DB, Kim EY, Park SP. The antioxidant icariin protects porcine oocytes from age-related damage in vitro. Anim Biosci 2020; 34:546-557. [PMID: 32777912 PMCID: PMC7961286 DOI: 10.5713/ajas.20.0046] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 01/28/2020] [Accepted: 04/29/2020] [Indexed: 02/08/2023] Open
Abstract
OBJECTIVE If fertilization does not occur within a specific period, the quality of unfertilized oocytes in the oviduct (in vivo aging) or in culture (in vitro aging) will deteriorate over time. Icariin (ICA), found in all species of Epimedium herbs, has strong antioxidant activity, and is thought to exert anti-aging effects in vitro. We asked whether ICA protects oocytes against age-related changes in vitro. METHODS We analyzed the reactive oxygen species (ROS) levels and expression of antioxidant, maternal, and estrogen receptor genes, and along with spindle morphology, and the developmental competence and quality of embryos in the presence and absence of ICA. RESULTS Treatment with 5 μM ICA (ICA-5) led to a significant reduction in ROS activity, but increased mRNA expression of glutathione and antioxidant genes (superoxide dismutase 1 [SOD1], SOD2, peroxiredoxin 5, and nuclear factor erythroid 2-like 2), during aging in vitro. In addition, ICA-5 prevented defects in spindle formation and chromosomal alignment, and increased mRNA expression of cytoplasmic maturation factor genes (bone morphogenetic protein 15, cyclin B1, MOS proto-oncogene, serine/threonine kinase, and growth differentiation factor-9). It also prevented apoptosis, increased mRNA expression of antiapoptotic genes (BCL2-like 1 and baculoviral IAP repeat-containing 5), and reduced mRNA expression of pro-apoptotic genes (BCL2 antagonist/killer 1 and activation of caspase-3). Although the maturation and cleavage rates were similar in all groups, the total cell number per blastocyst and the percentage of apoptotic cells at the blastocyst stage were higher and lower, respectively, in the control and ICA-5 groups than in the aging group. CONCLUSION ICA protects oocytes against damage during aging in vitro; therefore, it can be used to improve assisted reproductive technologies.
Collapse
Affiliation(s)
- Jae-Wook Yoon
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju 63243, Korea.,Stem Cell Research Center, Jeju National University, Jeju 63243, Korea
| | - Seung-Eun Lee
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju 63243, Korea.,Stem Cell Research Center, Jeju National University, Jeju 63243, Korea
| | - Yun-Gwi Park
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju 63243, Korea.,Stem Cell Research Center, Jeju National University, Jeju 63243, Korea
| | - Won-Jae Kim
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju 63243, Korea.,Stem Cell Research Center, Jeju National University, Jeju 63243, Korea
| | - Hyo-Jin Park
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju 63243, Korea.,Stem Cell Research Center, Jeju National University, Jeju 63243, Korea
| | - Chan-Oh Park
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju 63243, Korea.,Stem Cell Research Center, Jeju National University, Jeju 63243, Korea
| | - So-Hee Kim
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju 63243, Korea.,Stem Cell Research Center, Jeju National University, Jeju 63243, Korea
| | - Seung-Hwan Oh
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju 63243, Korea.,Stem Cell Research Center, Jeju National University, Jeju 63243, Korea
| | - Do-Geon Lee
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju 63243, Korea.,Stem Cell Research Center, Jeju National University, Jeju 63243, Korea
| | - Da-Bin Pyeon
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju 63243, Korea.,Stem Cell Research Center, Jeju National University, Jeju 63243, Korea
| | - Eun-Young Kim
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju 63243, Korea.,Stem Cell Research Center, Jeju National University, Jeju 63243, Korea.,Mirae Cell Bio, Seoul 04795, Korea
| | - Se-Pill Park
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju 63243, Korea.,Stem Cell Research Center, Jeju National University, Jeju 63243, Korea.,Mirae Cell Bio, Seoul 04795, Korea
| |
Collapse
|
3
|
Park CO, Ro H, Lee J. Effects of intubation with a double-lumen endotracheal tube on intraocular pressure during rapid sequence induction using succinylcholine chloride in patients with or without underlying systemic hypertension. Anesth Pain Med (Seoul) 2019; 14:449-455. [PMID: 33329776 PMCID: PMC7713805 DOI: 10.17085/apm.2019.14.4.449] [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: 05/02/2019] [Revised: 07/22/2019] [Accepted: 08/01/2019] [Indexed: 12/03/2022] Open
Abstract
Background Tracheal intubation is closely associated with increases in intraocular pressure (IOP); however, the effects of double-lumen tube (DLT) intubation on IOP have not been validated. Systemic hypertension (HTN) is another factor that may increase IOP. In this study, we observed differences in IOP increases between DLT and singlelumen tube (SLT) intubation, and evaluated the influence of underlying HTN during rapid sequence induction. Methods Sixty-eight patients were allocated into one of the following group: SLT/without HTN (n = 17), SLT/HTN (n = 17), DLT/without HTN (n = 17), and DLT/HTN (n = 17). An SLT was inserted for orthopedic or gynecological surgery, and a DLT was inserted for lung surgery after rapid sequence induction using succinylcholine. IOP was measured before anesthetic induction and until 10 min after intubation using a handheld tonometer (Tono-Pen AVIA®). Results In the DLT/without HTN and DLT/HTN groups, the maximum increases in IOPs after tracheal intubation were 7.9 and 12.2 mmHg, respectively, compared to baseline. In the SLT/without HTN and SLT/HTN groups, the maximum increases were 5.0 and 4.9 mmHg, respectively, compared to baseline. In comparisons between patients with and without underlying HTN, the values of IOPs were comparable. Conclusions Tracheal intubation with a DLT is associated with more increases in IOPs than with an SLT in rapid sequence induction. Well-controlled underlying hypertension did not increase IOP during tracheal intubation.
Collapse
Affiliation(s)
- Chan-Oh Park
- Department of Anesthesiology and Pain Medicine, 1Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hojun Ro
- Uijeongbu St. Mary's Hospital, The Catholic University of Korea, College of Medicine, Uijeongbu, Korea
| | - Jaemin Lee
- Uijeongbu St. Mary's Hospital, The Catholic University of Korea, College of Medicine, Uijeongbu, Korea
| |
Collapse
|
4
|
Jeong SG, Lee SE, Kim WJ, Park YG, Yoon JW, Park CO, Park HJ, Kim EY, Park SP. Pioglitazone improves porcine oocyte maturation and subsequent parthenogenetic embryo development in vitro by increasing lipid metabolism. Mol Reprod Dev 2019; 86:1245-1254. [PMID: 31429176 DOI: 10.1002/mrd.23252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 06/30/2019] [Indexed: 12/17/2022]
Abstract
Optimization of culture conditions is important to improve oocyte maturation and subsequent embryo development. In particular, this study analyzed the effects of increasing concentrations of PIO in the maturation medium on spindle formation and chromosome alignment, glutathione, and intracellular ROS levels and expression of selected genes related to maternal markers, apoptosis, and lipid metabolism. The percentage of oocytes displaying normal spindle formation and chromosome alignment was higher in the 1 µM PIO (1 PIO)-treated group than in the control group. The glutathione level was significantly higher in the 1 PIO-treated group than in the control group, while the reactive oxygen species level did not differ. Expression of maternal marker (MOS and GDF9), antiapoptotic (BIRC5), and lipid metabolism-related (ACADS, CPT2, SREBF1, and PPARG) genes was higher in the 1 PIO-treated group than in the control group, while expression of a proapoptotic gene (CASP3) was lower. The blastocyst formation rate and the percentage of blastocysts that reached at least the hatching stage on Days 6 and 7, and the percentage of blastocysts containing more than 128 cells were significantly higher in the 1 PIO-treated group than in the control group. These results indicate that PIO treatment during in vitro maturation improves porcine oocyte maturation and subsequent parthenogenetic embryo development mainly by enhancing lipid metabolism and antioxidant defense in oocytes.
Collapse
Affiliation(s)
- Sang-Gi Jeong
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Korea.,Stem Cell Research Center, Jeju National University, Jeju-si, Korea
| | - Seung-Eun Lee
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Korea.,Stem Cell Research Center, Jeju National University, Jeju-si, Korea
| | - Won-Jae Kim
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Korea.,Stem Cell Research Center, Jeju National University, Jeju-si, Korea
| | - Yun-Gwi Park
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Korea.,Stem Cell Research Center, Jeju National University, Jeju-si, Korea
| | - Jae-Wook Yoon
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Korea.,Stem Cell Research Center, Jeju National University, Jeju-si, Korea
| | - Chan-Oh Park
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Korea.,Stem Cell Research Center, Jeju National University, Jeju-si, Korea
| | - Hyo-Jin Park
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Korea.,Stem Cell Research Center, Jeju National University, Jeju-si, Korea
| | - Eun-Young Kim
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Korea.,Stem Cell Research Center, Jeju National University, Jeju-si, Korea.,Mirae Cell Bio, Seoul, Korea
| | - Se-Pill Park
- Faculty of Biotechnology, College of Applied Life Sciences, Jeju National University, Jeju-si, Korea.,Stem Cell Research Center, Jeju National University, Jeju-si, Korea.,Mirae Cell Bio, Seoul, Korea
| |
Collapse
|
5
|
Park KH, Lee J, Lee JY, Lee SC, Sim DW, Shin JU, Park CO, Lee JH, Lee KH, Jeong KY, Park JW. Sensitization to various minor house dust mite allergens is greater in patients with atopic dermatitis than in those with respiratory allergic disease. Clin Exp Allergy 2018; 48:1050-1058. [PMID: 29700921 DOI: 10.1111/cea.13164] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 02/11/2018] [Accepted: 03/14/2018] [Indexed: 02/05/2023]
Abstract
BACKGROUND Various allergenic proteins are produced by house dust mites (HDM). However, the allergenicity and clinical implications of these allergens are unknown. OBJECTIVE The purpose of this study was to identify allergens in Dermatophagoides farinae and elucidate the sensitization profiles to these in Korean patients suffering from respiratory (allergic rhinitis and/or asthma) and atopic dermatitis symptoms. METHODS IgE reactivities in sera from 160 HDM allergy patients were analysed by one- and two-dimensional gel electrophoresis and immunoblotting. IgE-reactive components were identified by liquid chromatography-coupled electrospray ionization-tandem mass spectrometry. Nine recombinant mite allergens (Der f 1, Der f 2, Der f 10, Der f 11, Der f 13, Der f 14, Der f 30, Der f 32 and Der f Alt a 10) were produced, and the IgE reactivity in sera to each was determined by ELISAs. RESULTS Der f 1 and Der f 2 were recognized by IgE in serum samples from 88.1% and 78.1% of all patients, respectively. Patients with respiratory allergies were mainly sensitized to these major allergens, whereas patients with atopic dermatitis symptoms showed polysensitization to major and minor allergen components (including Der f 11, Der f 13, Der f 14, Der f 32 and Der f Alt a 10). CONCLUSIONS Patients with respiratory allergic disease sensitize to major allergen components of HDM. Those with atopic dermatitis were sensitized to a broader range of minor allergen components of HDM (Der f 11, Der f 13, Der f 14, Der f 32 and Der f Alt a 10).
Collapse
Affiliation(s)
- K H Park
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - J Lee
- Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - J-Y Lee
- Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - S C Lee
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - D W Sim
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Division of Allergy, Asthma, and Clinical Immunology, Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - J U Shin
- Department of Dermatology, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - C O Park
- Department of Dermatology, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - J-H Lee
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - K H Lee
- Department of Dermatology, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - K Y Jeong
- Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| | - J-W Park
- Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
| |
Collapse
|
6
|
Hong SH, Park CO, Park CS. Prediction of newly developed acute renal failure using serum phosphorus concentrations after living-donor liver transplantation. J Int Med Res 2013; 40:2199-212. [PMID: 23321177 DOI: 10.1177/030006051204000618] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE This retrospective study investigated the predictive role of serum phosphorus concentration for acute renal failure (ARF), defined by the Risk Injury Failure Loss End-stage kidney disease (RIFLE) criteria, after living-donor liver transplantation (LDLT). METHODS Perioperative factors, including serum phosphorus concentrations, in LDLT recipients without pre-existing renal dysfunction were retrospectively analysed and compared between patients with or without post-LDLT ARF. RESULTS A total of 45 patients out of 350 (12.9%) met the RIFLE ARF criteria and experienced significantly higher postoperative mortality, longer intensive care unit stay and more frequent graft dysfunction than those patients without post-LDLT ARF. Multivariate logistic regression analyses showed that a serum phosphorus concentration ≥ 4.5 mg/dl on postoperative day 1 (relative risk [RR] 5.31; 95% confidence interval [CI] 2.56, 11.03), a preoperative model for end-stage liver disease score 20 points (RR 4.17, 95% CI 2.04, 8.52), and packed red blood cell transfusion 10 units (RR 2.55, 95% CI 1.13, 5.88) were independent risk factors for post-LDLT ARF. CONCLUSIONS Hyperphosphataemia on postoperative day 1 could be an early and simple indicator of ARF occurrence after LDLT.
Collapse
Affiliation(s)
- S H Hong
- Department of Anaesthesiology and Pain Medicine, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Republic of Korea
| | | | | |
Collapse
|
7
|
Affiliation(s)
- K-Y Lee
- Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | | | | | | |
Collapse
|
8
|
Abstract
Although nitric oxide (NO) plays an important role in the pathophysiological process of cerebral ischemia or severe traumatic brain injury, its contribution to the pathogenesis of moderate diffuse axonal injury (mDAI) remains to be clarified. The alterations in nitric oxide synthase (NOS) activity and the histopathological response after mDAI was investigated. Forty anesthetized Sprague-Dawley adult rats were injured with a Marmarou's weight-drop device through a Plexiglas guide tube. These rats were divided into 8 groups (control, 1 hr, 2 hr, 3 hr, 6 hr, 12 hr, 24 hr, 48 hr after trauma). The temporal pattern of apoptosis in the adult rat brain after mDAI was characterized using TUNEL histochemistry. In addition, the cDNA for NOS activity was amplified using RT-PCR. The PCR products were electrophoresed on a 2% agarose gel. eNOS activity was not detected, but nNOS activity was expressed after 3 hr and continuously 48 hr after impact, which was approximately double that of the control group at 12 and 24 hr. Subsequently, there was a decrease in activity after 48 hr. The iNOS activity increased dramatically after 12 hr and was constant for a further 12 hr followed by a dramatic decrease below the level of the control group. Significant apoptotic changes occurred 12 and 24 hr. after insult. nNOS and iNOS activity were affected after moderate diffuse axonal injury in a time-dependent manner and there was a close relation between the apoptotic changes and NOS activity. Although the nNOS activity was expressed early, its activity was not stronger than iNOS, which was expressed later.
Collapse
Affiliation(s)
- C O Park
- Department of Neurosurgery, College of Medicine, Inha University, Sungnam, Korea.
| | | |
Collapse
|
9
|
Abstract
The role of the Na+/H+ exchanger in rat hearts during ischemia and reperfusion was investigated by measurements of intracellular Na+ concentration ([Na+]i) and intracellular and extracellular pH. Under our standard conditions (2-Hz stimulation), 10 min of ischemia caused no significant rise in [Na+]i but an acidosis of 1.0 pH unit, suggesting that the Na+/H+ exchanger was inactive during ischemia. This was confirmed by showing that the Na+/H+ exchange inhibitor methylisobutyl amiloride (MIA) had no effect on [Na+]i or on intracellular pH during ischemia. However, there was a short-lived increase in [Na+]i of 8.2 +/- 0.6 mM on reperfusion, which was reduced by MIA, showing that the Na+/H+ exchanger became active on reperfusion. To investigate the role of metabolic changes, we measured [Na+]i during anoxia. The [Na+]i did not change during 10 min of anoxia, but there was a small, transient rise of [Na+]i on reoxygenation, which was inhibited by MIA. In addition, we show that the Na+/H+ exchanger, tested by sodium lactate exposure, was inhibited during anoxia. These results show that the Na+/H+ exchanger is inhibited during ischemia and anoxia, probably by an intracellular metabolic mechanism. The exchanger activates rapidly on reperfusion and can cause a rapid rise in [Na+]i.
Collapse
Affiliation(s)
- C O Park
- Institute of Biomedical Research and Department of Physiology, University of Sydney F13, New South Wales 2006, Australia
| | | | | |
Collapse
|
10
|
Park CO. The effects of methylprednisolone on prevention of brain edema after experimental moderate diffuse brain injury in rats--comparison between dosage, injection time, and treatment methods. Yonsei Med J 1998; 39:395-403. [PMID: 9821787 DOI: 10.3349/ymj.1998.39.5.395] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Our study was designed to determine whether methylprednisolone exerts a beneficial effect after experimental moderate diffuse brain injury and whether this possible beneficial effect is affected by the dosage, the timing of administration, and the methods of treatment. A total of 200 anesthetized adult rats were injured utilizing a weight-drop device through a Plexiglas guide tube. These rats were divided into eight groups: Group 1 (n = 35) was assigned to receive no methylprednisolone after impact (control group), Group 2 (n = 25) received an initial intraperitoneal administration of methylprednisolone with a dose of 5 mg/kg at 1 hour after cranial impact, followed by administration with a maintenance dose of 5 mg/kg/4 hours. Group 3 (n = 25), group 5 (n = 25), and group 7 (n = 20) received an initial 30 mg/kg at 1 hour, 4 hours, and 8 hours, respectively without a maintenance dose. Group 4 (n = 25), group 6 (n = 25), and group 8 (n = 20) received an initial 30 mg/kg at 1 hour, 4 hours, and 8 hours after impact, with a maintenance dose of 15 mg/kg/4 hours. Measured water content of brain tissue expressed the amount of water as the difference between fresh and dry weight. At 48 hours after impact, the water content in group 4 and 6 were significantly lower than group 1. Mean +/- SD was 61.4 +/- 0.37% in group 4 (p < 0.03), 61.5 +/- 0.34% in group 6 (p < 0.001), and 63.6 +/- 0.48% in group 1. Compared to group 1, the difference was not statistically significant in group 2 (p > 0.1), group 3 (p > 0.5), group 5 (p > 0.6), group 7 (p > 0.1), and group 8 (p > 0.5). Groups treated with mega dose before 4 hours after head injury, including maintenance dose, showed beneficial effects. Our study suggests that the efficacy of methylprednisolone in head injury was related to the dosage, the timing of administration, and method of treatment.
Collapse
Affiliation(s)
- C O Park
- Department of Neurosurgery, Inha Hospital, College of Medicine, Inha University, Sung Nam City, Korea
| |
Collapse
|
11
|
Abstract
There have been no reports indicating diurnal variations in MRI at different portions of each lumbar disc. Eight asymptomatic healthy volunteers between 22 and 29 years old had MRI of their lumbar spine, twice on the same day (in the morning and evening). Forty lumbar discs were studied and the signal intensity change was measured from three portions of each disc (a total of 120 portions). No visible changes could be detected between scans by blinded observers. However, the calculated signal intensity changes showed an average loss of -20.0% (ant., 5 cases), -19.0% (mid, 2 cases), and -17.5% (post., 1 case). Height loss of the disc showed an average loss of -9.9% (ant., 4 cases), -8.3% (mid., 2 cases), and -10.4% (post., 2 cases). An increase of disc bulge at L4-5 level (18.3%) was pronounced, but L5-S1 level was less than others. Loss of body height averaged a loss of 7 mm (0.39% of body height). There was no correlation between reduced signal intensity and height loss at the ant./post. portion (p = 0.42), but there was a close relation at the mid. portion (p = 0.008). Diurnal change of the disc bulge was not correlated with reduced signal intensity (p = 0.48) or height loss (p = 0.16). Intradiscal fluid change was not necessarily influenced by the disc height loss, and height loss did not necessarily have an effect on disc bulge. But diurnal change showed a trend that was reflected in reduced signal intensity, height loss, and an increase of disc bulge which was more apparent from the ant. portion to the post, portion on moving down to the lower levels. Loss of disc height was one factor in the reduction of body height. These changes occurred randomly throughout 5 lumbar disc levels in each case.
Collapse
Affiliation(s)
- C O Park
- Department of Neurosurgery, Inha Hospital, College of Medicine, Inha University, Sung Nam City, Kyung Gi Do, Korea
| |
Collapse
|
12
|
Abstract
A case report is presented of a Class II, Division 1 malocclusion with a considerable amount of maxillary arch length deficiency and a significant anterior posterior discrepancy. The patient was treated without extraction to the standards of the American Board of Orthodontics. [This case was presented to the American Board of Orthodontics in partial fulfillment of the requirements for the certification process conducted by the Board.]
Collapse
Affiliation(s)
- C O Park
- Department of Orthodontics, Temple University, Philadelphia, PA, USA
| | | |
Collapse
|
13
|
Koh KK, Kim SH, Lee KH, Kwon KS, Kim EJ, Baik SH, Cho SK, Kim SS, Park CO, Chung JK. Does prevalence of migraine and Raynaud's phenomenon also increase in Korean patients with proven variant angina? Int J Cardiol 1995; 51:37-46. [PMID: 8522395 DOI: 10.1016/0167-5273(95)02371-3] [Citation(s) in RCA: 14] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND The incidence of coronary artery spasm in oriental patients is higher than that in western patients. Oriental patients with variant angina (VA) frequently show normal or insignificant coronary artery stenosis by angiogram, compared with western patients. The prevalence of migraine and Raynaud's phenomenon in oriental patients with VA has not yet reported. OBJECTIVE We did a prospective study on the prevalence of migraine and Raynaud's phenomenon in patients with proven VA compared with those in two control groups using a radioisotope technique following ice water exposure. Simultaneously, we studied lipid profiles of each group. METHODS AND RESULTS migraine was diagnosed if the score in part A totalled 7 or more of 26, and Raynaud's phenomenon was diagnosed if the score in part B totalled 4 or more of 11 by Miller et al. Technetium-99m-labeled red blood cells (99mTc-RBC) radionuclide angiography was performed in all patients. Patients were included in a prospective protocol. Patients were grouped as follows: Group I: 20 patients with proven VA; Group II: 30 patients with coronary artery disease; Group III: 31 patients without heart disease. Age and sex of patients were not statistically different among the three groups. Migraine was diagnosed in 8 patients (40.0%) of group I and in 6 patients (20.0%) of group II and in 12 patients (38.7%) of group III. Raynaud's phenomenon was reported in 2 (10.0%) of the patients in group I and in 5 (16.1%) of the patients of group III. The mean index ratio of the digital blood flow of right over left hand on static image was 0.85 +/- 0.07 (mean +/- S.E.M.) of the patients of group I, 0.73 +/- 0.03 of the patients of group II and 0.74 +/- 0.04 of the patients of group III. The mean flow index ratio of right over left hand of the digital blood flow on dynamic study was 0.51 of the patients of group I, 0.43 of the patients of group II and 0.43 of the patients of group III. The score of migraine did not differ significantly among the three groups. The score of Raynaud's phenomenon of patients with variant angina did not differ significantly from that of patients in the non-coronary control group, although it differed significantly from that of patients in the coronary control group. But, the prevalence of migraine and Raynaud's phenomenon (questionnaire and radionuclide angiography) in patients of group I did not differ significantly from that in groups II and III. In the end, more patients with variant angina than coronary or non-coronary control group did not reach the predetermined point level for the diagnosis of migraine and Raynaud's phenomenon. Lipid profiles were not significantly different among three groups. CONCLUSIONS This result suggests that variant angina may not be a manifestation of a generalized vasospastic disorder in Korean patients.
Collapse
Affiliation(s)
- K K Koh
- Department of Internal Medicine and Neurology, Inha University Hospital, Sungnam-si, Kyunggi-do, Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Abstract
A consecutive series of 34 severe head-injured patients (DAI) were studied prospectively. Patients were categorized according to a new, simple classification system comprised of four lesion types according to the compression or obliteration of the ventricles or cisterns. Five patients belonged to type II and 19 patients to type IV. Each type was further subdivided into two GCS score ranges (5 to 8 and below 5). The distribution of the posttraumatic infarction was mainly in the frontal and temporal lobes (60% of all cases). Our data demonstrated that the ICP was significantly lower at a 30 degrees head elevation than at 0 degree (18.6 +/- 7.21 mmHg vs 23.0 +/- 10.60 mmHg. t = 4.22 P < 0.001), but head position did not statistically affect CPP (69.4 +/- 19.86 mmHg vs 68.2 +/- 19.87 mmHg. t = -0.54, P < 0.59). The effect of intensive therapy on ICP, CPP and AVDO2 was studied in all cases, employing steroids and diuretics in a modified intensive care scale. In cases where barbiturates were employed, there were statistically significant changes in ICP and AVDO2 (P < 0.001), but CPP was not affected (P < 0.59). Surviving patients were analyzed by using the GOS and the neurological grading score (NGS, Nihon University) of the persistent vegetative state. Our data suggests that head elevation of 30 degrees and barbiturate therapy are more effective on ICP and AVDO2, and NGS more exact than GOS in vegetative patients.
Collapse
Affiliation(s)
- C O Park
- Department of Neurosurgery, In Ha Hospital, College of Medicine, In Ha University, Sungnam, Korea
| | | |
Collapse
|
15
|
Park CO, Lee KC, Kim YS, Lee HJ. Clinical observation and surgical treatment of cerebral arteriovenous malformation. Yonsei Med J 1978; 19:39-48. [PMID: 754411 DOI: 10.3349/ymj.1978.19.1.39] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
|
16
|
Park CO, Lee LS, Park CH. [Clinical observations and nursing care of a cardiac patient with hypertension]. Taehan Kanho 1970; 9:40-4. [PMID: 5266881] [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: 01/14/2023]
|
17
|
Park CO. [Clinical observation and nursing care of patients with cerebral apoplexy]. Taehan Kanho 1969; 8:49-52. [PMID: 5262564] [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: 01/14/2023]
|