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Fukui A, Kido A, Inada Y, Mii Y, Tamai S. Closed rupture of the flexor digitorum profundus tendon of the little finger caused by calcification of the triangular-fibrocartilage. JOURNAL OF HAND SURGERY (EDINBURGH, SCOTLAND) 1996; 21:375-7. [PMID: 8771481 DOI: 10.1016/s0266-7681(05)80207-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A case of rupture of flexor digitorum profundus tendon of the little finger caused by calcification of the triangular fibrocartilage (TFC) is reported. At operation, a round defect of the TFC and rupture of the flexor digitorum profundus tendon (FDP) of the little finger were observed. The defect of TFC was repaired using the palmaris tendon and FDP of the little finger was woven into FDP of the ring finger. Eleven months after operation, the patient had almost full flexion and extension of the distal and proximal interphalangeal joints.
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102
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Fukui A. Increasing coronary perfusion pressure on diastolic and systolic performance is less pronounced in right ventricle than in left ventricle. Cardiovasc Res 1996. [DOI: 10.1016/0008-6363(96)00044-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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103
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Fukui A, Yamaguchi S, Tamada Y, Miyawaki H, Shirakabe M, Baniya G, Tomoike H. Increasing coronary perfusion pressure on diastolic and systolic performance is less pronounced in right ventricle than in left ventricle. Cardiovasc Res 1996; 31:899-906. [PMID: 8759245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
OBJECTIVE Little is known as to whether an increase in coronary perfusion pressure can alter the right ventricular (RV) distensibility and the contractile function as it does in the case of the LV. METHODS In eight isolated isovolumically contracting canine hearts, RV and LV volumes and coronary perfusion were independently controlled. Effects of an increase in coronary perfusion pressure (from 73 +/- 1 to 152 +/- 6 mmHg) on the end-diastolic and end-systolic pressure-volume relations in both RV and LV were assessed. RESULTS Following an increase in coronary perfusion, and at a similar volume of the ventricles, end-diastolic pressure was elevated by 2.8 +/- 0.8 mmHg in RV and 8.9 +/- 2.0 mmHg in LV (P < 0.01; RV vs LV), and the slope of RV end-systolic pressure-volume relation, Ees, increased by 11 +/- 6% (P < 0.05) and that of the LV Ees by 21 +/- 5% (P < 0.01). The percent change of RV pressure-volume area (PVA) was less than that in LV-PVA (26 +/- 9 vs 48 +/- 11%; P < 0.05). CONCLUSIONS Accordingly, increases in coronary perfusion pressure and/or flow decreased the RV distensibility and enhanced the RV contractile function, the extent of which, however, was less than that in the LV.
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Hamamatsu Y, Kanamori S, Tachihara R, Fukui A, Nakamura S. 070 Whether allergic contact dermatitis is necessary to induce systemic immunization by applied hapten. J Dermatol Sci 1996. [DOI: 10.1016/0923-1811(96)89469-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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105
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Omokawa S, Mizumoto S, Iwai M, Tamai S, Fukui A. Innervated radial thenar flap for sensory reconstruction of fingers. J Hand Surg Am 1996; 21:373-80. [PMID: 8724464 DOI: 10.1016/s0363-5023(96)80347-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A radial thenar flap, which is supplied by the superficial palmar branch of the radial artery and innervated by the superficial branch of the radial nerve, was used in four patients for sensory reconstruction of the fingers. Two patients had degloving injuries of the hand and two had amputation injuries of the thumb. Three of the cases underwent free-flap transfers, and one case underwent a reverse-flow island flap. The size of these flaps was about 3 x 5 cm except in one case, where a 15 x 5 cm flap combined with a radial forearm flap was used. Sensory reinnervation was excellent and donor site morbidity was minimal in all four cases. An innervated radial thenar flap from the ipsilateral hand offers an alternative choice to reconstruct large palmar defects of the fingers.
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Yoshikane H, Hamajima E, Yokoi T, Suzuki T, Ieda H, Miyachi N, Fukui A. Lymphangioma of the colon treated by endoscopic resection following find-needle puncture aspiration. Endoscopy 1996; 28:407-8. [PMID: 8813521 DOI: 10.1055/s-2007-1005499] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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107
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Ono H, Nakagawa Y, Yajima H, Fukui A, Tamai S. Rupture of the common extensor tendon caused by an arthritic spur of the third metacarpophalangeal joint. J Hand Surg Am 1996; 21:87-8. [PMID: 8775201 DOI: 10.1016/s0363-5023(96)80159-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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108
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Takaori M, Fukui A, Kimura K, Mihira M, Endou S, Fujiwara T. [Hemostatic mechanism associated with aprotinin during and after the extracorporeal circulation for cardiac and great vessel surgery]. MASUI. THE JAPANESE JOURNAL OF ANESTHESIOLOGY 1995; 44:1661-6. [PMID: 8583662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
It has been reported that aprotinin (apr) is effective for hemostasis during and after the extracorporeal circulation (ECC) for cardiac or great vessel surgery. However its mechanism remains still obscure. In this study, we observed relationships between changes in interleukin-8 (IL-8), endothelial factors, or D-dimer and aprotinin administered before and after the ECC. Fourteen patients in whom cardiac or great vessel surgery was done using ECC were divided randomly into two groups. Seven subjects in Group I (G-I) were infused 10(6) KIU of apr immediately after anesthesia, immediately before and after the ECC, respectively, and 10(6) KIU of apr were also added during the ECC. Seven other subjects (G-II) were infused 10(6) KIU of apr immediately before and at three hours after the ECC, and also 2 x 10(6) KIU of apr immediately after the ECC. No marked hemorrhagic tendency was noted in all subjects and increase in plasma D-dimer was not marked. Immediately after the ECC, granulocyte elastase in plasma increased markedly in both groups but subsequently decreased in the G-II alone while it remained unchanged in the G-I. Similar changes were observed in plasma IL-8 values. During the ECC, intercellular adhesion molecule-1 in plasma decreased in both groups but von Willebrand factor activity decreased in the G-I alone. From the above data, the hemostatic effect of apr may contribute to protect the dysfunction of endothelial cells or to enhance recovering from the dysfunction during the ECC.
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109
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Yajima H, Tamai S, Ishida H, Fukui A. Partial soleus muscle island flap transfer using minor pedicles from the posterior tibial vessels. Plast Reconstr Surg 1995; 96:1162-8. [PMID: 7568494 DOI: 10.1097/00006534-199510000-00025] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A new method for partial soleus muscle island flap transfer using minor pedicles from the posterior tibial vessels was designed and executed. A portion of the soleus muscle body that was slightly wider than the defect was harvested with minor pedicles. The muscle flap was transposed by turning it over or by creating an island flap. Skin grafts were applied to the exposed muscle. This new type of muscle flap was applied to six patients with a pretibial skin defect at the lower third of the leg. It was used for treatment of an open fracture with an associated skin defect in four patients, chronic osteomyelitis in one patient, and a recurrent stasis ulcer in one patient. In all patients the transferred muscle flap survived completely.
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Fukui A, Inada Y, Murata K, Tamai S. "Plasmatic imbibition" in the rabbit flow-through venous flap, using horseradish peroxidase and fluorescein. J Reconstr Microsurg 1995; 11:255-64. [PMID: 7562717 DOI: 10.1055/s-2007-1006541] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
In the present study, the phenomenon of "plasmatic imbibition" was investigated histologically in a rabbit flow-through venous flap model, using horseradish peroxidase and fluorescein. Horseradish peroxidase introduced between the flap and the recipient bed, produced brown staining of the entire contact surface 10 min postoperatively. At 30 min, erythrocytes in the flow-through vein stained red. The flap and the erythrocytes became more intensely stained over time. When horseradish peroxidase was introduced from a central artery after a Silastic sheet had been inserted between the flap and recipient bed, the flap color became a soft brown and the erythrocytes of the flow-through vein stained red 10 min postoperatively. In the experimental groups subjected to fluorescein, introduced between the graft (or flap) and the recipient bed, fluorescence was seen 10 min postoperatively, except in the flow-through vein. At 30 and 120 min, the whole graft (or flap) showed fluorescence. Fluorescein was introduced into the femoral vein after flap elevation, or a Silastic sheet was inserted between the flap and the recipient bed. At 10 min, these groups showed a weak fluorescence only in the flow-through vein; subsequently, at 120 min, the flow-through vein and its surrounding tissue showed fluorescence, but the flap showed none. Plasmatic imbibition was proved to be acting in the flow-through vein, and it is considered as important a phenomenon in flap survival as venous flow itself.
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Onami K, Takahashi M, Fukui A, Kanno H, Tsukamoto K, Sato H, Komatsu M, Umetsu Y, Kikuta Y, Endo S. [A case of antimitochondrial antibody (AMA) negative primary biliary cirrhosis (PBC) associated with Sjögren's syndrome and arthropathy]. NIHON SHOKAKIBYO GAKKAI ZASSHI = THE JAPANESE JOURNAL OF GASTRO-ENTEROLOGY 1995; 92:259-63. [PMID: 7731097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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112
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Nakano H, Uchiyama H, Fukui A, Sugino H, Asashima M. Comparison of mesoderm-inducing activity with monomeric and dimeric inhibin alpha and beta-A subunits on Xenopus ectoderm. HORMONE RESEARCH 1995; 44 Suppl 2:15-22. [PMID: 7672775 DOI: 10.1159/000184656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Activin possesses mesoderm-inducing activity, erythroid-differentiating activity, and follicle-stimulating hormone-releasing activity. The chemical structures of the activin molecule are formed by a combination of two beta-subunit peptides of inhibin. Inhibin is a dimer consisting of an alpha and beta subunit. To examine the mesoderm-inducing activity of these substances, we tested several configurations including: (1) two types of alpha-subunit peptide; (2) two types of inhibin A and B dimer; (3) beta A-subunit peptide monomer; (4) three types of activins A, AB and B, and (5) follistatin (activin-binding protein) by the animal cap assay using Xenopus laevis ectoderm, and by the erythroid-differentiating factor (EDF) test. Activins, which are composed of dimeric inhibin beta A- or beta B-subunit peptides, had the highest mesoderm-inducing and EDF activities. The monomeric beta A-subunit peptide exhibited mesoderm-inducing and EDF activities that were much lower than activin A. The inhibitory effect of follistatin on mesodermal induction by the beta A-subunit peptide was also lower than that of activin. Both inhibins A and B had very weak mesoderm-inducing activity and no EDF activity. The two types of inhibin alpha-subunit monomer had little mesoderm-inducing activity and no EDF activity. The mesoderm induction caused by activin A was not suppressed by the addition of the alpha-subunit monomer and inhibin. The mesoderm-inducing activity in relation to the chemical structures of the monomeric and/or dimeric inhibin alpha and beta A subunits is discussed.
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Fukui A, Westmore B. To see or not to see: the debate over pornography and its relationship to sexual aggression. Aust N Z J Psychiatry 1994; 28:600-6. [PMID: 7794203 DOI: 10.3109/00048679409080783] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The role played by pornography in the generation of thoughts, feelings, impulses and behaviours in its viewers has long been a topic of debate and controversy. The uncertainty about its potential effects on human behaviour, especially its relationship to sexual aggression, has stimulated the recent debate with the possibility of tighter censorship laws being implemented throughout this country. A review of the topic from a number of different perspectives fails to establish that pornography in its purely erotic form has any significant detrimental effect on human behaviour. More difficult to determine are its effects on psychological development. If behavioural disturbances do occur following exposure to such material, they occur in the context of an individual who shows more global disturbances of personality. The current debate regarding pornography provides an opportunity to address in a broader social context issues perhaps more significant for our society: the relationships between men and women, and the roles and recognition provided to each of the sexes.
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Takaori M, Fukui A, Kimura K, Fujita Y. The effect of positive end-expiratory pressure on the cardiac output and organ blood volumes accompanied with increase in intraabdominal pressure. PATHOPHYSIOLOGY 1994. [DOI: 10.1016/0928-4680(94)90730-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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115
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Onami K, Fukui A, Takahashi M, Kanno H, Tsukamoto K, Sato H, Komatsu M, Umetsu Y, Kikuta Y, Endo S. [Two patients with positive anticentromere antibody showing different clinical features of CREST syndrome or primary biliary cirrhosis (PBC)]. NIHON SHOKAKIBYO GAKKAI ZASSHI = THE JAPANESE JOURNAL OF GASTRO-ENTEROLOGY 1994; 91:2004-8. [PMID: 7967139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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116
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Kurihara K, Fukui A, Kumano S. Malignant lymphoma of the esophagus associated with macroglobulinemia: report of a case. Pathol Int 1994; 44:712-5. [PMID: 7804434 DOI: 10.1111/j.1440-1827.1994.tb02951.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A case of non-Hodgkin's lymphoma of the esophagus in a 74 year old man is presented. Grossly, the surgically removed esophagus had a fusiform submucosal mass covered with smooth surfaced mucosa. Microscopic examination revealed that the mass consisted of a dense infiltrate of small to medium-sized lymphoid cells with plasmacytoid differentiation, leading to a diagnosis of diffuse small cell lymphoma with lymphoplasmacytic subtype. Laboratory data as well as immunohistochemical studies proved that the lymphoma produced monoclonal immunoglobulin M, giving rise to macroglobulinemia.
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Imamura K, Ashida H, Nakajima H, Takagi M, Ohashi K, Saeki M, Fukui A, Endo M, Ishikawa T. Reproducibility of magnetic resonance spectroscopy in patients undergoing dialysis and evaluation of the therapeutic response of tumors. Invest Radiol 1994; 29:758-65. [PMID: 7960626 DOI: 10.1097/00004424-199408000-00005] [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: 01/28/2023]
Abstract
RATIONALE AND OBJECTIVES The reproducibility of repeated magnetic resonance (MR) spectroscopy was studied in patients undergoing dialysis and treatment of a variety of malignant tumors. METHODS Localized MR spectra were obtained using a 1.5-T system by image-selected in vivo spectroscopy. Total metabolite signal was integrated between phosphomonoester and beta-adenosine triphosphate resonance. We termed this measurement AREA. RESULTS Intrapatient variability was evaluated on repeated thigh muscle spectroscopy for 10 patients. Sequential spectra of 10 malignant tumors of the extremities were analyzed and compared with the histology of surgical specimens in seven patients. Intrapatient variability in AREA was calculated as 14.0%. The extent of necrosis and AREA ratio (definition: AREA post-therapy/AREA pretherapy) were as follows; 6.1% in > 90% necrosis, 43% in 50% to 90% necrosis, and 79% in < 50% necrosis. CONCLUSIONS Localized MR spectra are fairly reproducible and may relate to treatment efficacy.
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Fukui A, Asashima M. Control of cell differentiation and morphogenesis in amphibian development. THE INTERNATIONAL JOURNAL OF DEVELOPMENTAL BIOLOGY 1994; 38:257-66. [PMID: 7981034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We reviewed cell differentiation and morphogenesis by mesoderm-inducing factors during amphibian embryogenesis. Recently, two kinds of growth factors, activin and FGF, have been identified as influential candidates for natural mesoderm-inducing factor in amphibian development. These factors are present in early Xenopus embryos. In particular, activin has been shown to induce many kinds of mesodermal tissues in a dose-dependent manner. Activin-treated ectodermal sheet (animal cap) acts as an organizer causing gene expression, mesoderm formation and functional events such as secondary axis formation. Follistatin, an activin-specific binding protein, also present in the early Xenopus embryo, makes a complex with activin. Follistatin protein exerts no inducing activity of Xenopus animal cap. Endogenous follistatin may, however, play the role of an activin regulation factor. Endogenous actions of activin and FGF were studied using injection of their receptor mRNAs. Disruption of the FGF signaling pathway by its non-functional dominant negative receptors produced trunk and tail defects. In the case of activin, an embryo cannot form axial structures. Animal-half blastomeres from the late 8-cell stage Xenopus embryo respond to activin, and there are prepatterns in ventral and dorsal cells from very early stages. The timing of mesoderm induction during development and the relationship between the inducing factors and competent cells are discussed in this report. Differentiation of tissues and organized formation of organs can be understood as a system of serial inductive reactions originating from the organizer. We have attempted to construct a model of organizer formation based on the results of recent studies.
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Fukui A, Nakamura T, Uchiyama H, Sugino K, Sugino H, Asashima M. Identification of activins A, AB, and B and follistatin proteins in Xenopus embryos. Dev Biol 1994; 163:279-81. [PMID: 8174782 DOI: 10.1006/dbio.1994.1143] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
There are several lines of evidence that activin is a crucial molecule for mesoderm induction in early Xenopus embryos. However, it is not known what kind and what amounts of activin proteins exist in cleavage stage embryos. Three isoforms of activins, A, AB, and B, were demonstrated to be present at least in part as a complex with abundant follistatin, an activin-binding protein, in early Xenopus embryos (stage 1-5). These results suggest that activin stored in eggs has an important role for mesoderm induction during early Xenopus embryogenesis and that follistatin can modulate the function of activin in signaling developmental changes.
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Abstract
We conducted a survey among 94 members of the Japanese Society of Reconstructive Microsurgery on the present status of replantation in Japan. The results indicate that 9,664 extremities were replanted (157 upper arms, 415 forearms, 471 hands, 8,320 digits, 33 thighs, 103 calves, 37 feet, and 128 toes); 8,227 replants survived, for a success rate of 85%. The survival rate was over 90% in 23 hospitals, and 7 of these hospitals replanted more than 100 limbs. Postoperative treatment consisted of continuous intravenous infusion of urokinase (120,000-240,000 U/day), heparin (10,000-20,000 U/day), and prostaglandin E1 (80-120 micrograms/day) for 3-10 days. Fifty-six surgeons attempted replantation whenever the patient requested it. At Nara Medical University, continuous local intra-arterial infusion of anticoagulants and fibrinolytic agents has increased the survival rate of the replantation to 97%, compared with 88% when using intravenous infusion.
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Fukui A, Inada Y, Maeda M, Mizumoto S, Yajima H, Tamai S. Venous flap--its classification and clinical applications. Microsurgery 1994; 15:571-8. [PMID: 7830540 DOI: 10.1002/micr.1920150810] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We previously reported pedicled venous flap survival using the rat model, as well as venovenous, arteriovenous, and arterialized flow-through venous flap survival using the rabbit ear model. For this study, we utilized these flaps clinically. Five of seven pedicled venous flaps survived, displaying superficial necrosis. The others became partially necrotic; they were transferred after dissection of a long pedicle vein. Eight of nine venovenous flow-through venous flaps survived; six displayed superficial necrosis. The nonsurviving flap became completely necrotic, possibly because only one donor vein and one recipient vein were used. Six of 10 arteriovenous flow-through venous flaps survived. The remaining four became partially necrotic, possibly because only one vein was anastomosed for outflow. The arterialized flow-through venous flap survived. The pedicled venous and venovenous groups studied seem likely to survive despite superficial necrosis. However, the draining vein should not be dissected more than 5 cm, and many draining veins should be anastomosed with recipient vessels.
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Yamaguchi S, Tamada Y, Miyawaki H, Niida Y, Fukui A, Shirakabe M, Ohta I, Tsuiki K, Tomoike H. Resetting of regional preload due to ventricular shape change alters diastolic and systolic performance. THE AMERICAN JOURNAL OF PHYSIOLOGY 1993; 265:H1629-37. [PMID: 8238573 DOI: 10.1152/ajpheart.1993.265.5.h1629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The diastolic and systolic pressure of one ventricle is increased by an increase in volume and/or pressure of the opposite ventricle; however, a mechanism for the ventricular interaction remains unclear. We hypothesized that the shape change of one ventricle elicited by the opposite ventricle would lead to resetting of the regional length, which may explain the ventricular interaction. We used 15 cross-circulated isovolumically contracting canine hearts in which both ventricular volumes were independently controlled. Diastolic regional segment area was calculated by multiplying circumferential and longitudinal lengths on right ventricular free wall (RVFW; n = 6), interventricular septum (IVS; n = 11), and left ventricular (LV) FW (n = 12). The regional area at relatively small volumes of both ventricles were expressed as 100%. With constant RV volume, increasing LV from 7 to 19 ml increased RV diastolic and systolic pressures by 2.7 and 5.5 mmHg, respectively. Conversely, increasing RV volume increased LV diastolic and systolic pressures by 2.3 and 7.5 mmHg, respectively. Increasing LV volume increased RVFW regional area from 121.0 to 124.6% (P < 0.01) and increased IVS regional area from 103.3 to 108.7% (P < 0.01), whereas the RV volume was held constant. Increasing RV volume also increased LVFW and IVS regional areas from 109.9 to 111.6% (P < 0.01) and from 106.8 to 108.9% (P < 0.05), respectively. Ventricular shape change elicited by ventricular interaction will increase the regional wall area, even though the volume of the chamber is unchanged. The increase in the regional area alters the position of the tissue on its resting and active length-tension relations and, thus, leads to enhancement of the chamber pressure.
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Fukui A, Nakamura T, Sugino K, Takio K, Uchiyama H, Asashima M, Sugino H. Isolation and characterization of Xenopus follistatin and activins. Dev Biol 1993; 159:131-9. [PMID: 8365557 DOI: 10.1006/dbio.1993.1227] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Xenopus follistatin and activins were purified from a Xenopus laevis cell line (XTC-F1) by four purification steps consisting of consecutive affinity chromatography on dextran sulfate-Sepharose and Sulfate Cellulofine, fast protein liquid chromatography gel permeation, and reverse-phase high performance liquid chromatography (HPLC). Our results thus obtained indicated that almost equimolar amounts of activins A, AB, and B were found to be present as a complex with follistatin (activin-binding protein) in the conditioned medium of XTC-F1 cells. Reverse-phase HPLC of the complex gave Xenopus follistatin and activins A, AB, and B. The purified Xenopus follistatin showed four major bands in a molecular mass range from 34 to 39 kDa by SDS-polyacrylamide gel electrophoresis under nonreducing conditions. The ability of each form of the protein to specifically bind activin was determined by activin-binding assay and ligand blotting analysis. Each protein was found to have the same NH2-terminus and its sequence was very homologous to that of mammalian follistatin. Several criteria including immunoblotting analysis and various functional assays revealed the existence of three isoforms of activins A, AB, and B in Xenopus, as in mammals. Xenopus activins significantly induced both ventral and dorsal mesoderm in explants of Xenopus blastula cells that would otherwise form epidermis. In a dose-dependent manner of each isoform of activin, the induced explants were able to differentiate into blood-like cells, coelomic epithelium, mesenchyme, muscle, and notochord. The induction patterns of three Xenopus activins were essentially the same. The mesoderm induction by the purified Xenopus activins was shown to be inhibited stoichiometrically by the purified Xenopus follistatin. These results indicate that Xenopus XTC-F1 cells secrete several molecular forms of follistatin/activin-binding protein and three isoforms of activins AB and B in addition to activin A.
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Ono H, Tamai S, Yajima H, Fukui A, Inada Y, Mizumoto S. Blood flow through prefabricated flaps--an experimental study in rabbits. BRITISH JOURNAL OF PLASTIC SURGERY 1993; 46:449-55. [PMID: 7693272 DOI: 10.1016/0007-1226(93)90216-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Prefabricated flaps were created by femoral vessel implantation beneath the abdominal skin in rabbits. The area of survival and blood flow through the prefabricated flap were measured after 1, 2, 4, 6, 8, and 12-week intervals. The parameters at 6, 8 and 12-week intervals were significantly larger than those for random pattern flaps (p < 0.01), but were significantly smaller than those for axial pattern flaps (p < 0.01). The minimum interval at which the prefabricated flap could be transferred successfully was between 6 and 8 weeks in this model. Microangiography demonstrated that neovascularisation began at the distal end of the implanted vascular bundle and spread throughout the flap by 8 weeks.
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