• 제목/요약/키워드: Microvascular

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A study and the growth and the development of microvascular complications in patients with type 1 diabetes mellitus (1형 당뇨병 환자의 성장과 미세혈관 합병증 발생에 대한 연구)

  • Lee, Young Ah;Yun, Kyong-Ah;Shin, Choong Ho;Yang, Sei Won
    • Clinical and Experimental Pediatrics
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    • v.50 no.2
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    • pp.190-197
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    • 2007
  • Purpose : Reduced growth and microvascular complications have been recognized as consequences of type 1 diabetes mellitus (T1DM). We assessed the effect of T1DM on growth and factors associated with the development of microvascular complications. Methods : We conducted a retrospective longitudinal evaluation of 154 patients above 16 years of age. We analyzed factors which affect final height standard deviation scores (SDS) and development of microvascular complications. Results : Final height SDS was $-0.11{\pm}1.15$ ($-0.26{\pm}1.33$ in females, $0.04{\pm}0.91$ in males). Final height SDS was significantly lower than midparental height SDS and height SDS at diagnosis. There was no difference in final height SDS according to age at onset, existence or nonexistence of complications, or average $HbA_{1C}$. Height SDS at onset of puberty, midparental height SDS and pubertal growth gain affected final height SDS. The number of patients with complications was 37 (24 percent). Microvascular complications developed at a younger age and after longer duration of diabetes in patients with a prepubertal onset of T1DM compared to patients with pubertal onset. Patients with complications had a higher level of average $HbA_{1C}$ than patients without complications. Patients whose microalbuminuria regressed had lower levels of average $HbA_{1C}$, systolic BP, second 24h urine microalbumin than patients with persistant or progressed microalbuminuria. Conclusion : The results suggest that degrees of glycemic control don't affect final height, but various factors associated with T1DM can impair growth potential. Additionally, the degrees of glycemic control and puberty affect the development of microvascular complications.

Fusobacterium nucleatum GroEL signaling via Toll-like receptor 4 in human microvascular endothelial cells

  • Lee, Hae-Ri;Choi, Bong-Kyu
    • International Journal of Oral Biology
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    • v.37 no.3
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    • pp.130-136
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    • 2012
  • The GroEL heat-shock protein from Fusobacterium nucleatum, a periodontopathogen, activates risk factors for atherosclerosis in human microvascular endothelial cells (HMEC-1) and ApoE-/- mice. In this study, we analyzed the signaling pathways by which F. nucleatum GroEL induces the proinflammatory factors in HMEC-1 cells known to be risk factors associated with the development of atherosclerosis and identified the cellular receptor used by GroEL. The MAPK and NF-${\kappa}B$ signaling pathways were found to be activated by GroEL to induce the expression of interleukin-8 (IL-8), monocyte chemoattractant protein 1 (MCP-1), intercellular adhesion molecule 1 (ICAM-1), vascular cell adhesion molecule 1 (VCAM-1), E-selectin, and tissue factor (TF). These effects were inhibited by a TLR4 knockdown. Our results thus indicate that TLR4 is a key receptor that mediates the interaction of F. nucleatum GroEL with HMEC-1 cells and subsequently induces an inflammatory response via the MAPK and NF-${\kappa}B$ pathways.

Free jejunal graft for cervical esophageal reconstruction (경부식도 재건을 위한 유리 공장 이식술)

  • O, Sang-Jun;Kim, Chang-Ho
    • Journal of Chest Surgery
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    • v.24 no.5
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    • pp.515-521
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    • 1991
  • Since Carrel in 1907 reported transfer of a free jejunal segment in dog, reconstruction of the cervical esophagus and hypopharynx has been accomplished successfully with free jejunal transplantation using microvascular technique. Free jejunal graft is useful in cases of failed colonic interpositions. Three patients with benign esophageal stricture had undergone reconstruction with right colon interposition. Because of necrosis and stricture of the interposed colon, in each case the defect was reconstructed with a free jejunal graft by using microvascular technique. The postoperative course in two patients was uncomplicated, and they were able to eat general diet. Graft necrosis occurred in one patient, but she is waiting for a reoperation.

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Oxidant Activities in Human Dermal Microvascular Endothelial Cells Infected with Orientia tsutsugamushi (Orientia tsutsugamushi에 감염된 인간 피부 미세혈관 내피세포의 산화 활성)

  • Koh Young-Sang
    • Korean Journal of Microbiology
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    • v.41 no.3
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    • pp.232-235
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    • 2005
  • Transcripts levels of superoxide dismutases increase slightly following infection of human dermal microvascular endothelial cells(HMEC-1) by the obligae intracellular bacterium Orientia tsutsugamushi, the causative agent of scrub typhus. In addition, fluorescence-activated cell sorter analysis demonstrates significant intracellular peroxide activity in infected cells within 5 hr after exposure to O. tsutsugamushi. Furthermore, infected cells experienced a significant depletion of glutathiones. These results support hypothesis that cells infected by this intracellular bacterium experience oxidant-mediated injury.

Downbeat Nystagmus Associated With Brainstem Compression by Vertebral Artery

  • Moon, Ki-Hyoung;Lee, Sang-Ahm;Ahn, Jae-Sung;Kwun, Byung-Duk
    • Journal of Korean Neurosurgical Society
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    • v.41 no.3
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    • pp.190-192
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    • 2007
  • Rarely, downbeat nystagmus can occur due to compression of the lower brainstem by the ectatic vertebral artery and be resolved by microvascular decompression. We present a case of a 67-year-old man with downbeat nystagmus associated with brainstem compression by ectatic vertebral artery. He presented with oscillopsia and vertigo. When he turned his head upward, his symptoms were aggravated and a gait disturbance occurred. Magnetic resonance imaging and computed tomographic angiography demonstrated compression of the medulla oblongata by the left ectatic vertebral artery and other medical causes of downbeat nystagmus were ruled out. Retromastoid craniotomy was performed and after lifting the vertebral artery off the medulla, a trough-shaped indentation in the lower brainstem was identified. The ectatic vertebral artery was repositioned and a Teflon was inserted between the brainstem and the ectatic vertebral artery. Postoperatively, downbeat nystagmus had disappeared.

Radiofrequency Thermocoagulation for Trigeminal Neuralgia Sustained Following Microvascular Decompression -A case report- (미세혈관감압술에도 지속된 삼차신경통의 고주파 열응고술을 이용한 치험 -증례 보고-)

  • Kim, Hae-Kyu;Kang, Dong-Hee;Kim, Ki-Yeob;Baik, Seong-Wan;Kim, In-Se
    • The Korean Journal of Pain
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    • v.11 no.2
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    • pp.302-306
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    • 1998
  • The authors report the result achieved in the treatment of trigeminal neuralgia patient, especially V2 involved patient, using radiofrequency (RF) thermocoagulation of Gasserian ganglion. A 62-year old female patient had severe burning pain on right cheek usually initiating from upper molar teeth area for 10 years. She was treated with microvascular decompression operation 10 years ago. However, there was no pain relief by operation. She wanted non-surgical treatment. Therefore, we recommended RF thermocoagulation therapy. After 2 times of RF thermocoagulation, there was excellent pain relief without complications. And, for 6months follow-up, there were no pain, and no evidences of complication and recurrence.

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Hemifacial Spasm Caused by Fusiform Aneurysm at Vertebral Artery-Posterior Inferior Cerebellar Artery Junction

  • Choi, Seok-Keun;Rhee, Bong-Arm;Park, Bong-Jin;Lim, Young-Jin
    • Journal of Korean Neurosurgical Society
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    • v.44 no.6
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    • pp.399-400
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    • 2008
  • Hemifacial spasm induced by intracranial aneurysm is a rare clinical condition. A 45-year-old male patient presented with a 3-year history of progressive involuntary twitching movement on right face. On radiological study, a dilated vascular lesion compressing the brain stem was found at the junction of vertebral artery and posterior inferior cerebellar artery. On operative field, we found the posterior inferior cerebellar artery and the fusiform aneurysm compressing root exit zone of facial nerve. Microvascular decompression was performed and the facial symptom was relieved without complications.