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Lee HS, Seo Y, Rho JR, Shin J, Paul VJ. New steroidal alkaloids from an undescribed sponge of the genus Corticium. JOURNAL OF NATURAL PRODUCTS 2001; 64:1474-1476. [PMID: 11720539 DOI: 10.1021/np0101649] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Two new steroidal alkaloids, along with a previously reported one of the plakinamine class, were isolated from the sponge Corticium sp. collected from Guam. The structures of the new compounds were determined by combined spectroscopic methods. These compounds exhibited moderate cytotoxicity and antifungal activity as well as DNA- and RNA-cleaving activities.
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Kim YJ, Park JJ, Lee JR, Rho JR, Yun YS, Choi JY, Noh CI. Modified Lecompte procedure for the anomalies of ventriculoarterial connection. Ann Thorac Surg 2001; 72:176-80; discussion 180-1. [PMID: 11465174 DOI: 10.1016/s0003-4975(01)02618-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND The Lecompte procedure for correcting transposition of the great arteries has an advantage because it obviates the need for an extracardiac conduit for the reconstruction of the pulmonary outflow tract. In this study, we evaluated the effectiveness and the application of the Lecompte procedure based on our experiences. METHODS A retrospective review was conducted of the records of 45 patients who underwent the Lecompte procedure during the past 11 years to achieve direct right ventricle to pulmonary artery continuity. Mean age at operation was 2.4+/-1.7 years (range 3.5 months to 6.9 years). The diagnoses involved anomalies of the ventriculoarterial connection with ventricular septal defect and pulmonary outflow tract obstruction, such as transposition of the great arteries, double-outlet right ventricle, and double-outlet left ventricle. RESULTS Early mortality was 4.4% (2 of 45 patients) and late mortality was 4.7% (2 of 43). The mean follow-up was 4.9+/-3.1 years. Fourteen patients (34.1% of survivors, n = 41) had pulmonary stenosis (pressure gradient above 30 mm Hg), the main reason for which was a calcified monocusp valve (n = 10, 71.4%). Eight of 45 patients (17.8%) underwent reoperation: 2 for residual ventricular septal defect, 1 for recurrent septic vegetation, and 5 for pulmonary stenosis. The cumulative survival rates were 91.1%+/-4.2% at 10 years. The actuarial probabilities of freedom from reoperation for pulmonary stenosis were 93.8%+/-4.3% and 71.4%+/-11.8% at 5 and 10 years, respectively. CONCLUSIONS Our review suggests that the Lecompte procedure is an effective treatment modality for anomalies of the ventriculoarterial connection with ventricular septal defect and pulmonary outflow tract obstruction. Repair in early age is possible with acceptable morbidity and mortality, but recurrent right ventricular outflow tract obstruction caused by degeneration of the monocusp valve is a problem that needs resolution.
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Shin J, Lee HS, Woo L, Rho JR, Seo Y, Cho KW, Sim CJ. New triterpenoid saponins from the sponge Erylus nobilis. JOURNAL OF NATURAL PRODUCTS 2001; 64:767-771. [PMID: 11421740 DOI: 10.1021/np010047d] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Erylosides G--J (1--4), four new triterpenoid saponins, were isolated from the sponge Erylus nobilis collected from Jaeju Island, Korea. On the basis of the results of combined chemical and spectral analyses, the structures of the aglycones were determined to be lanostane-based, modified penasterols. The oligosaccharide portions were composed of one unit each of L-arabinose, D-galactose, and 2-N-acetyl-D-glucosamine (1 and 3) or two units of L-arabinose and one unit of 2-N-acetyl-D-glucosamine (2 and 4). These compounds exhibited moderate cytotoxicty against a human leukemia cell line.
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Cho KW, Lee HS, Rho JR, Kim TS, Mo SJ, Shin J. New lactone-containing metabolites from a marine-derived bacterium of the genus Streptomyces. JOURNAL OF NATURAL PRODUCTS 2001; 64:664-667. [PMID: 11374972 DOI: 10.1021/np000599g] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Six novel metabolites containing a lactone moiety as a common structural feature, along with the previously described (-)-blastmycinolactol, have been isolated from the cultivation broth of a bacterium of the genus Streptomyces isolated from marine sediment. On the basis of the results of combined spectroscopic analysis, the structures of the new compounds have been determined as butenolides and 3-hydroxy-gamma-butyrolactones.
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Rho JR, Oh MS, Jang KH, Cho KW, Shin J. New xenicane diterpenoids from the gorgonian Acalycigorgia inermis. JOURNAL OF NATURAL PRODUCTS 2001; 64:540-543. [PMID: 11325246 DOI: 10.1021/np0005154] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Eight diterpenes and norditerpenes including five new xenicane metabolites (4--8) have been isolated from the gorgonian Acalycigorgia inermis. The structures of these compounds have been determined by combined spectroscopic analysis. The new compounds exhibited significant cytotoxicity against a human leukemia cell-line.
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Shin J, Rho JR, Seo Y, Lee HS, Cho KW, Kwon HJ, Sim CJ. Wondonins A and B, new bis(dihydroxystyryl)imidazoles from a two-sponge association. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)00092-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Jo YH, Choi JS, Kim WE, Park JW, Choi WW, Kim HC, Kim WG, Ahn H, Rho JR, Min BG. Analysis of the interventricular pressure waveform in the moving-actuator total artificial heart. ASAIO J 2000; 46:749-55. [PMID: 11110275 DOI: 10.1097/00002480-200011000-00018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Right and left filling pressures are important parameters in the automatic control of a total artificial heart (TAH) within normal physiologic ranges. Our TAH is composed of a moving actuator, right and left ventricles, and an interventricular space (IVS) enclosed by a semirigid housing. During operation of the TAH, the IVS volume is changed dynamically by the difference between the ejection volume of one ventricle and the inflow volume of the other. We measured the interventricular pressure (IVP) waveform by using a pressure sensor and analyzed the relationship between the IVP and the preload condition. From in vitro and in vivo experiments, we found that the measured filling pressures were linearly related to the negative peak value of the IVP. Additionally, we found that we could use the time interval from actuator start to the positive peak value of the IVP (outflow valve opening) as a useful parameter to estimate the blood filling volume of the diastole ventricle.
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Shin J, Lee HS, Seo Y, Rho JR, Cho KW, Paul VJ. New Bromotyrosine Metabolites from the Sponge Aplysinella rhax. Tetrahedron 2000. [DOI: 10.1016/s0040-4020(00)00761-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Lee HS, Seo Y, Cho KW, Rho JR, Shin J, Paul VJ. New triterpenoid saponins from the sponge Melophlus isis. JOURNAL OF NATURAL PRODUCTS 2000; 63:915-919. [PMID: 10924165 DOI: 10.1021/np990589j] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Four new triterpenoid saponins were isolated, along with two known 30-norlanostane-type saponins- sarasinosides A(1) (1) and A(3) (2)-from the sponge Melophlus isis collected from Guam. The structures of these new compounds (3-6) proved to be 30-norlanosta-8(14),24-dien-23-ones bearing two hydroxyl groups or the corresponding methoxy groups at the 9alpha,15alpha- and 9alpha, 15beta-positions and the pentasaccharide portion identical with those of 1 and 2 at the 3beta position, by spectral, chemical, and GC analyses.
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Rho JR, Lee HS, Seo Y, Cho KW, Shin J. New xenicane diterpenoids from the gorgonian Acalycigorgia inermis. JOURNAL OF NATURAL PRODUCTS 2000; 63:254-257. [PMID: 10691721 DOI: 10.1021/np990392r] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Acalycixeniolides D-G [corrected] (1-4), four new diterpenoids of the xenicane class, have been isolated from the gorgonian Acalycigorgia inermis. The structures of these compounds have been determined by combined spectroscopic methods. These compounds exhibited cytotoxicity against a human leukemia cell-line.
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Kim KB, Cho KR, Sohn DW, Ahn H, Rho JR. The Cox-Maze III procedure for atrial fibrillation associated with rheumatic mitral valve disease. Ann Thorac Surg 1999; 68:799-803; discussion 803-4. [PMID: 10509965 DOI: 10.1016/s0003-4975(99)00777-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
BACKGROUND The surgical results of the Cox-Maze III procedure (CM-III) for atrial fibrillation (AF) associated with rheumatic mitral valve (MV) disease are not as good as the results from surgery for AF alone. METHODS To assess the efficacy and safety of the CM-III in AF associated with rheumatic MV disease, we retrospectively analyzed 75 patients who underwent the CM-III combined with a rheumatic MV procedure between April 1994 and December 1997. Fourteen cases were reoperations because of prosthetic valve failure. RESULTS Mean aortic cross-clamp (ACC) times and cardiopulmonary bypass (CPB) times were 151+/-43 and 251+/-73 min, respectively. Concomitant procedures were mitral valve replacement (MVR) in 25 patients, MVR and aortic valve replacement (AVR) in 14 patients, MV repair in 10 patients, MVR and tricuspid annuloplasty (TAP) in 6 patients, MVR and AV repair in 3 patients, MVR and coronary artery bypass grafting (CABG) in 2 patients, MVR and AVR and CABG in 1 patient, redo-MVR in 8 patients, redo-MVR and TAP in 4 patients, and redo-MVR and redo-AVR in 2 patients. There were two in-hospital mortalities (2 of 75, 2.7%). Seventy-three survivors were followed for a mean duration of 30+/-13 months (12-56 months). Normal sinus rhythm was restored in 90.4% (66 of 73). Three patients remained in AF and 2 patients were in junctional rhythm. Permanent pacemakers were implanted in 2 patients due to sick sinus syndrome. Right atrial (RA) contractility was demonstrable in 100% (66 of 66) and left atrial (LA) contractility in 62.1% (41 of 66) of the patients in the latest follow-up echocardiography. RA and LA contractilities were restored a mean 69+/-93 and 126+/-136 days after the operation, respectively. LA contractility was restored significantly later at a lower rate than RA contractility in rheumatic MV disease. There were no differences in ACC time, CPB time, incidence of postoperative bleeding complications, and sinus conversion rates between non-redo and redo cases in spite of the significantly longer duration of preoperative AF in redo cases (p<0.05). CONCLUSIONS The CM-III for AF associated with rheumatic MV disease demonstrated a high sinus conversion rate with acceptable operative risk even in cases of reoperation.
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Kim WG, Choi JS, Won YS, Jo YH, Park SK, Chung CI, Kim J, Min BG, Ahn H, Rho JR. In vivo experiment leading to clinical application of an electrohydraulic ventricular assist device with magnetic coupling. ASAIO J 1999; 45:215-7. [PMID: 10360726 DOI: 10.1097/00002480-199905000-00021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
We developed an electrohydraulic ventricular assist device with magnetic coupling. The integrated system consists of a blood pump, a water conduit for pressure transmission, a bellows type pumping sac, an actuator for transforming the circular motion of a motor to the linear motion of a pusher plate attached to the pumping sac with magnetic coupling, and a controller. The purpose of the coupling was to prevent excessive sucking against the atrial wall. Number 21 Medtronic Hall (Irvine, CA) mechanical valves were used in the inflow and outflow ports of the blood pump. Maximum dynamic stroke volume was 48 ml, and against a mean afterload of 100 mm Hg, maximum pump output was 7 L/min. Chronic in vivo experiments were performed in three sheep, and during these evaluations the system showed no noticeable problems related to mechanical or electronic devices. When left atrial pressure decreased below 0 mm Hg, the magnetic coupling system decoupled the pumping sac and pusher plate with satisfactory reliability. The device was clinically applied in a postoperative patient with chronic dilating cardiomyopathy, and no significant device related problems ensued. These results prove that the electrohydraulic ventricular assist system with magnetic coupling is a suitable ventricular assist device.
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Shin J, Seo Y, Cho KW, Rho JR, Sim CJ. New Bis(Indole) alkaloids of the topsentin class from the sponge spongosorites genitrix. JOURNAL OF NATURAL PRODUCTS 1999; 62:647-649. [PMID: 10217734 DOI: 10.1021/np980507b] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Four bis(indole) alkaloids of the topsentin class, including two new brominated compounds (1 and 2), have been isolated from the sponge Spongosorites genitrix collected from Jaeju Island, Korea. The structures of the novel compounds were determined by spectroscopic methods. These compounds exhibited moderate cytotoxicity against a human leukemia cell-line (K-562).
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Seo Y, Cho KW, Lee HS, Rho JR, Shin J. New acetylenic enol ethers of glycerol from the sponge Petrosia sp. JOURNAL OF NATURAL PRODUCTS 1999; 62:122-126. [PMID: 9917297 DOI: 10.1021/np9803575] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Ten acetylenic enol ethers of glycerols, including six new compounds (1-6) and a linear acetylenic alcohol (7), have been isolated from a sponge of the genus Petrosia. The structures of the novel compounds were elucidated by spectroscopic methods. The absolute stereochemistry of 1-7 was determined by chemical transformations and the Mosher method. Some of these compounds exhibited weak cytotoxicity against a human leukemia cell-line (K-562).
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Kim YJ, Sohn DW, Park DG, Kim HS, Oh BH, Lee MM, Park YB, Choi YS, Seo JD, Lee YW, Kim KB, Rho JR. Restoration of atrial mechanical function after maze operation in patients with structural heart disease. Am Heart J 1998; 136:1070-4. [PMID: 9842022 DOI: 10.1016/s0002-8703(98)70165-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND The maze operation is effective for the restoration of sinus rhythm; however, restoration of atrial mechanical function has not been demonstrated in all patients. METHODS Maze operations were performed in 32 patients (13 men, 19 women; mean age 47.1 +/- 9.0 years) combined with valvular surgery (n = 25), coronary artery bypass graft (CABG) (n = 3), and others (n = 4). At 1 week, 3 months, 6 months, and 1 year after the operation, prospective serial Doppler echocardiographic examination was carried out to determine the presence of atrial mechanical function. RESULTS Sinus rhythm was restored and maintained during the follow-up period in 26 (81%) patients; in 22 patients this was due solely to the operation, whereas in four patients an antiarrhythmic agent was needed to maintain sinus rhythm. Another four patients showed paroxysmal atrial fibrillation (AF) despite treatment with an antiarrhythmic agent. Right atrial mechanical function was restored in all 30 patients with sinus rhythm or paroxysmal AF; in 19 (63%) of these, left atrial mechanical function was restored. In patients with restored left atrial mechanical function, peak A velocity (A) and A/E ratio (A/E) of mitral inflow were significantly lower than in the 16 postoperative control patients (A: 0.46 +/- 0.14 m/sec vs 0. 75 +/- 0.29 m/sec, p < 0.01; A/E: 0.40 vs 0.80, p < 0.01). In patients with left atrial mechanical function, the duration of AF was significantly shorter than in patients without left atrial mechanical function (1.9 +/- 2.9 years vs 7.1 +/- 3.0 years, p < 0. 01), but there were no significant differences in left atrial size and volume. CONCLUSIONS The maze operation could be safely added to standard open heart surgery for the correction of underlying structural heart disease. The rate of conversion to sinus rhythm resulting solely from the operation might be lower than the rates previously reported with only the duration of AF adversely affecting the restoration of left atrial mechanical function. Considering the fact that not all patients converted to sinus rhythm show atrial mechanical function, the role of the maze operation in the prevention of systemic embolism, with subsequent improvement in survival, requires further study.
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Shin J, Seo Y, Cho KW, Rho JR, Paul VJ. Osirisynes A-F, highly oxygenated polyacetylenes from the sponge Haliclona osiris. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(98)00480-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Seo Y, Cho KW, Rho JR, Shin J, Sim CJ. Petrocortynes and petrosiacetylenes, novel polyacetylenes from a sponge of the genus Petrosia. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(97)10290-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Paul VJ, Seo Y, Cho KW, Rho JR, Shin J, Bergquist PR. Sesquiterpenoids of the drimane class from a sponge of the genus Dysidea. JOURNAL OF NATURAL PRODUCTS 1997; 60:1115-1120. [PMID: 9392880 DOI: 10.1021/np9703297] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Ten sesquiterpenoids, including seven new ones, have been isolated from an undescribed sponge of the genus Dysidea. Compounds 1-8 are sesquiterpenoids of the drimane class, while 9 and 10 are 12-norsesquiterpenoids of the same structural class. The structures of novel compounds have been determined by combined spectroscopic methods. These compounds exhibited moderate antimicrobial and enzyme inhibitory (Na+/K(+)-ATPase and PLA2) activities.
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Kim WG, Chang JK, Kim HC, Min BG, Won YS, Rho JR. Moving actuator type total artificial heart with reverse position of the aortic and pulmonary conduits. Artif Organs 1997; 21:957-60. [PMID: 9247187 DOI: 10.1111/j.1525-1594.1997.tb00257.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Adequate intrathoracic anatomical compatibility is one of the most important considerations in designing a fully implantable total artificial heart (TAH). We have recently developed an innovative concept of reverse positioning of the aortic and pulmonary conduits to facilitate anatomical compatibility of the moving actuator type TAH. The pulmonary conduit of this TAH is designed to be located posterior to the aortic conduit, which results in a substantial reduction in the anteroposterior diameter of this heart, as well as the virtual elimination of the compression of the low pressure pulmonary conduit. In ovine orthotopic implantation experiments with this model of the TAH, we consecutively achieved 3 day survival in 1 sheep and 2 day survival in another. To the best of our knowledge, these were the first significant short-term survival cases in the orthotopic implantation of electric TAHs in sheep.
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Shin J, Seo Y, Cho KW, Rho JR, Sim CJ. Stellettamide B, a new indolizidine alkaloid from a sponge of the genus Stelletta. JOURNAL OF NATURAL PRODUCTS 1997; 60:611-613. [PMID: 9296951 DOI: 10.1021/np970041h] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Ahn H, Kim K, Chae H, Rho JR. Surgical management of type A aortic dissection: evaluation of predisposing factors for postoperative neurologic complication and late reoperation. CARDIOVASCULAR SURGERY (LONDON, ENGLAND) 1997; 5:104-11. [PMID: 9158131 DOI: 10.1016/s0967-2109(96)00071-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The technique of cerebral protection during hypothermic circulatory arrest remains controversial. Forty-seven patients underwent operations for type A aortic dissection in the past 9 years. During hypothermic circulatory arrest, selective cerebral perfusion and retrograde cerebral perfusion was applied in 12 and seven patients, respectively. The mortality rate was 28.6% in patients without adjunctive cerebral perfusion, 25.0% in selective cerebral perfusion patients, and zero in the retrograde cerebral perfusion group (P > 0.05). However, there was no mortality by cerebral injury in cerebral perfusion groups (P = 0.03). Age (P = 0.001), hypothermic circulatory arrest time (P = 0.012), and acuity (P = 0.013) were predisposing factors for cerebral injury, but cerebral perfusion has not yet been found to be a protective factor (P = 0.56). Nine late reoperations and three deaths occurred during the follow-up period. Marfan syndrome was the only predisposing factor for late reoperation (P = 0.016). In summary, although further studies are still required, retrograde cerebral perfusion is a possible cerebral protective factor. In addition, periodic follow-up is mandatory, especially in patients with Marfan syndrome.
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Kim WG, Kim YT, Park SK, Kim HC, Suh JW, Park JW, Paik WK, Lee BH, Min BG, Rho JR. Do sheep really have problems with cardiopulmonary bypass for total artificial heart implantation? Artif Organs 1997; 21:154-9. [PMID: 9028499 DOI: 10.1111/j.1525-1594.1997.tb00353.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Although the use of sheep in total artificial heart (TAH) implantation has many advantages, they are known to show a significant morbidity rate on cardiopulmonary bypass (CPB); this has been considered to be a major limiting factor in using them for TAH experiments. We conducted a series of ovine CPB experiments to evaluate the sheep's pathophysiological response to CPB. CPB-related hemolysis, bleeding, and lung dysfunction were analyzed in 5 sheep, which had undergone CPB, used at our hospital for TAH implantation. Four of the 5 sheep survived the experimental procedures, and 3 of them survived on a long-term basis. Unacceptable degrees of hemolysis related to CPB were not observed. Postoperative bleeding was not remarkable, and coagulation test results did not show significant abnormal findings. Acute lung injuries of a mild to moderate degree were found mainly at the microscopic level, but rarely had clinical significance. In conclusion, this experiment suggests that sheep can be used for the animal model for TAH implantation with acceptable risk on CPB circuits and techniques are used.
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Seo Y, Rho JR, Geum N, Yoon JB, Shin J. Isolation of guaianoid pigments from the gorgonian Calicogorgia granulosa. JOURNAL OF NATURAL PRODUCTS 1996; 59:985-986. [PMID: 8984163 DOI: 10.1021/np960485y] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Three pigments of the guaiazulene class have been isolated from the gorgonian Calicogorgia granulosa. Structures of these compounds have been determined as guaiazulene, 2,2'- diguaiazulenylmethane, and a new compound, 2,2'-biguaiazulenyl, by combined chemical and spectroscopic methods. 2,2'-Biguaiazulenyl exhibited moderate antimicrobial activity.
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Seo Y, Cho KW, Rho JR, Shin J, Kwon BM, Bok SH, Song JI. Solandelactones A-I, lactonized cyclopropyl oxylipins isolated from the hydroid Solanderia secunda. Tetrahedron 1996. [DOI: 10.1016/0040-4020(96)00606-0] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
BACKGROUND Congenital bronchoesophageal fistulas have rarely been reported. Presented here is the 14-year experience of our hospital with this lesion. METHODS The study comprises 13 patients; 9 had a Braimbridge type II fistula; 2, a type I fistula; and 2, a type IV fistula. The most frequent site of communication was between the middle esophagus and the right lower lobe of the lung, especially the superior segment. A fistulectomy, with or without pulmonary resection, was performed on each patient. RESULTS All patients had complete relief of symptoms. No operative complications were observed. CONCLUSIONS Congenital bronchoesophageal fistulas in adults are usually diagnosed by an esophagography. Symptoms are often nonspecific, and the possibility of a congenital bronchoesophageal fistula should be considered in patients who complain of long-standing unexplainable respiratory symptoms such as coughing and frequent pulmonary infections. The surgical intervention is relatively simple. In many cases, a fistulectomy with simple closure of the openings in both the esophagus and the bronchus is all that is required. Pulmonary resection is needed in some patients with severe bronchiectasis and recurrent pneumonitis.
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