• Title/Summary/Keyword: Organ size

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Hippo-YAP/TAZ signaling in angiogenesis

  • Park, Jeong Ae;Kwon, Young-Guen
    • BMB Reports
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    • v.51 no.3
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    • pp.157-162
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    • 2018
  • Angiogenesis is a complex, multistep process involving dynamic changes in endothelial cell (EC) shapes and behaviors, especially in specialized cell types such as tip cells (with active filopodial extensions), stalk cells (with less motility) and phalanx cells (with stable junction connections). The Hippo-Yes-associated protein (YAP)/ transcription activator with PDZ binding motif (TAZ) signaling plays a critical role in development, regeneration and organ size by regulating cell-cell contact and actin cytoskeleton dynamics. Recently, with the finding that YAP is expressed in the front edge of the developing retinal vessels, Hippo-YAP/TAZ signaling has emerged as a new pathway for blood vessel development. Intriguingly, the LATS1/2-mediated angiomotin (AMOT) family and YAP/TAZ activities contribute to EC shapes and behaviors by spatiotemporally modulating actin cytoskeleton dynamics and EC junction stability. Herein, we summarize the recent understanding of the role of Hippo-YAP/TAZ signaling in the processes of EC sprouting and junction maturation in angiogenesis.

A New Species of Genus Neon (Araneae, Salticidae) from Korea (한국산 Neon속(거미목, 깡충거미과)의 1신종)

  • Seo, Bo-Keun
    • Animal Systematics, Evolution and Diversity
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    • v.11 no.3
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    • pp.323-327
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    • 1995
  • A new species, Neon rostratus n.sp., is descirbed withi illustrations. This species is closet to N. avalonus especially in the shapes of palpal organ and epigynum, but , in female, is readily separated by comparing the size of spermathecae, which is remarkably larger than that of N. avalonus, The male of N. roastratus can be clearly distinguished from other Neon-species by the tip structure of ejaculatory duct.

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HABIT : Cancer Diagnosis System (HABIT : 질병 진단 시스템)

  • Kim, Gi-Seong;On, Seung-Yeop;Gang, Gyeong-Nam
    • Proceedings of the KIEE Conference
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    • 2003.11c
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    • pp.898-902
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    • 2003
  • In this paper we proposes a new technique for identification of breast cancer by classification of proteome pattern generated from 2-D polyacrylamide gel electrophoresis (2-D PAGE) and development of cancer diagnosis system : HABIT. Proteome patterns reflect the underlying pathological state of a human organ and it is believed that the anomalies or diseases of human organs are identified by the analysis or classification of the patterns. Proteome patterns consist of quantitative information of the spots such as their size, position, and density in the proteome image produced from 2-D PAGE, for the Image mining of proteome pattern, SVM(support vector machine) and GA(genetic algorithm) are used to generate a decision model for the identification of breast cancer The decision model was then used to classify an independent set of test proteome patterns into the affecter and unaffecter classes. The proposed technique was tested by actual clinical test samples and showed a good performance of a hit ratio of 90%.

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A New Species of Pholcus (Araneae: Pholcidae) from Korea (한국산 유령거미속(거미목: 유령거미과)의 1신종)

  • Seo, Bo-Keun
    • Animal Systematics, Evolution and Diversity
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    • v.20 no.1
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    • pp.73-77
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    • 2004
  • Phalcus joreangensis sp. nov.(Pholcidae) is described with illustrations. This species is very similar to Pholcus clavimaculatus Zhu and Song, 1999 in shape of uncus and embolus of male palpal organ. But it is distinguished from the latter by size of uncus, length of embolus, shape of procursus and trochanter spur, and lengths of 3rd and 4th leg.

Pharmacodynamic principles and target concentration intervention

  • Holford, Nick
    • Translational and Clinical Pharmacology
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    • v.26 no.4
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    • pp.150-154
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    • 2018
  • This tutorial reviews the principles of dose individualisation with an emphasis on target concentration intervention (TCI). Once a target effect is chosen then pharmacodynamics can predict the target concentration and pharmacokinetics can predict the target dose to achieve the required response. Dose individualisation can be considered at three levels: population, group and individual. Population dosing, also known as fixed dosing or "one size fits all" is often used but is poor clinical pharmacology; group dosing uses patient features such as weight, organ function and comedication to adjust the dose for a typical patient; individual dosing uses observations of patient response to inform about pharmacokinetic and pharmacodynamics in the individual and use these individual differences to individualise dose.

A novel role of Hippo-Yap/TAZ signaling pathway in lymphatic vascular development

  • Cha, Boksik;Moon, Sungjin;Kim, Wantae
    • BMB Reports
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    • v.54 no.6
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    • pp.285-294
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    • 2021
  • The lymphatic vasculature plays important role in regulating fluid homeostasis, intestinal lipid absorption, and immune surveillance in humans. Malfunction of lymphatic vasculature leads to several human diseases. Understanding the fundamental mechanism in lymphatic vascular development not only expand our knowledge, but also provide a new therapeutic insight. Recently, Hippo-YAP/TAZ signaling pathway, a key mechanism of organ size and tissue homeostasis, has emerged as a critical player that regulate lymphatic specification, sprouting, and maturation. In this review, we discuss the mechanistic regulation and pathophysiological significant of Hippo pathway in lymphatic vascular development.

Adrenal incidentaloma: a case of asymptomatic pheochromocytoma

  • Park, Sang Yoong;Rim, Jong Cheol;Cho, Hyun Chul;Lee, Yoon Chan;Kim, Jung A;Choi, So Ron
    • Kosin Medical Journal
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    • v.33 no.2
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    • pp.215-222
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    • 2018
  • An incidentaloma is a tumor found incidentally without clinical symptoms or suspicion; the lesion may be adrenal, pituitary, or thyroidal. We report the case of an asymptomatic individual with preoperatively undiagnosed pheochromocytoma (size: 4.86 cm) that was revealed using elective nonadrenal surgical procedures. The patient demonstrated peri- and post-operative hypertensive crisis and tachycardia. Three days after the dramatic onset of symptoms, the patient expired due to pulmonary edema, multiple organ failure, and terminal sepsis, despite administration of extracorporeal membrane oxygenation-assisted cardiopulmonary resuscitation. A left medial kidney mass obtained at autopsy confirmed pheochromocytoma.

Function and regulation of nitric oxide signaling in Drosophila

  • Sangyun Jeong
    • Molecules and Cells
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    • v.47 no.1
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    • pp.100006.1-100006.10
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    • 2024
  • Nitric oxide (NO) serves as an evolutionarily conserved signaling molecule that plays an important role in a wide variety of cellular processes. Extensive studies in Drosophila melanogaster have revealed that NO signaling is required for development, physiology, and stress responses in many different types of cells. In neuronal cells, multiple NO signaling pathways appear to operate in different combinations to regulate learning and memory formation, synaptic transmission, selective synaptic connections, axon degeneration, and axon regrowth. During organ development, elevated NO signaling suppresses cell cycle progression, whereas downregulated NO leads to an increase in larval body size via modulation of hormone signaling. The most striking feature of the Drosophila NO synthase is that various stressors, such as neuropeptides, aberrant proteins, hypoxia, bacterial infection, and mechanical injury, can activate Drosophila NO synthase, initially regulating cellular physiology to enable cells to survive. However, under severe stress or pathophysiological conditions, high levels of NO promote regulated cell death and the development of neurodegenerative diseases. In this review, I highlight and discuss the current understanding of molecular mechanisms by which NO signaling regulates distinct cellular functions and behaviors.

The Modified Method of Splenic Irradiation (초음파를 이용한 비장의 조준법)

  • Chung, Su-Mi;Jang, Hong-Seok;Choi, Ihl-Bohng;Kim, Choon-Yul;Bahk, Yong-Whee
    • Radiation Oncology Journal
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    • v.6 no.2
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    • pp.259-262
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    • 1988
  • Splenic irradiation in chronic myelogenous leukemia is reserved for patients who have painful splenemegaly despite chemotherapy and/or inoperable splenomegaly because of huge size. The role of splenic irradiation is diminution of painful splenomegaly and indirect effect of splenic irradiation on unirradiated hematopoietic and lymphoreticular tissue such as reduction of leukocyte count and increase of hemoglobin level. We report on a useful clinical method for splenic irradiation in chronic myelogenous leukemia. We have used sonography as the tool of simulation. The portal size using modified method is smaller than the field size of conventional simulation, and so this method suggests that useful to irradiation of huge splenomegaly, effective shielding of critical organ and the downfall of complication during irradiation of spleen.

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Effects of Astragalus membranaceus on Surgically Induced Endometriosis in Rats (황기가 자궁내막증 유발 흰쥐에 미치는 영향)

  • Kim, Yoon-Sang;Lim, Eun-Mee;Cho, Hyun-Ju
    • The Journal of Korean Obstetrics and Gynecology
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    • v.20 no.2
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    • pp.43-59
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    • 2007
  • Purpose : Astragalus membranaceus is a herb which has effectiveness of energy increase, protection against pathogenic and organ immune response control. Endometriosis has been thought to be related with immune response in uterus. Therefore in this study, the effects of Astragalus membranaceus on endometriosis were investigated. Methods : The endometrial tissue was autografted to rat's small intestine. Rats with surgically induced endometriosis was administerd with Astragalus membranaceus extracts for 40 days orally or rectally. We observed the size of ectopic uterine implants at the mesenteric with the naked eye and examined the concentrations of estradiol, progesterone, $TNF-{\alpha}$ and IL-2, IL-4, IL-6 and IL-10 in serum. Also, we inquired out the efficiency between oral and rectal administration groups. Results : The size of ectopic uterine implants of oral and rectal treated groups were much smaller than those of control groups. The concentration of estradiol, progesterone. $TNF-{\alpha}$ and IL-2 were significantly decreased in oral administration experimental group compared with the control group. The concentration of progesterone were significantly decreased in rectal administration experimental group compared with the control group. The efficiency of oral administration group was better than that of rectal administration group in the serum concentration of estradiol, $TNF-{\alpha}$ and IL-2. Conclusion : Our data suggest that Astragalus membranaceus reduce the size of ectopic uterine implants at the mesenteric wall and inhibit the growth of ectopic uterine implants. Judging from the above results, it can be suggested that Astragalus membranaceus should be a useful agent for inhibiting the proliferation of uterine endometrial tissue. May be, oral administration of Astragalus membranaceus is more effective than rectal administration for inhibiting the proliferation of endometriosis.

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