• Title/Summary/Keyword: Bak-like

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Identification of Bak-like Protein cDNA (Bak-like 단백질을 code하는 cDNA의 동정)

  • 김진경
    • YAKHAK HOEJI
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    • v.45 no.4
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    • pp.426-430
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    • 2001
  • Cells are eliminated in a variety of physiological settings by apoptosis, a genetically encoded process of cellular suicide. Bak, a member of the Bcl-2 protein family, accelerates apoptosis by an unknown mechanism. We have found a novel cDNA encoding a 101 amino acid protein possessing a Bak-like in our full-length cDNA bank. Bak-like shares the conserved domains BHI and 2 with other proapoptotic proteins but lacks the BH3 domain. Bak-like is expressed in a wide variety of tissues. Like Bak, Bak-like gene product primarily enhances apoptotic cell death following an appropriate stimulus.

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Quality Characteristics and Antioxidant Activity of Jeung-pyun added with Ju-bak Powder (주박 추출물 분말을 첨가한 증편의 항산화 활성 및 품질 특성)

  • Ko, Yeon Suk;Sim, Ki Hyeon
    • Journal of the East Asian Society of Dietary Life
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    • v.24 no.2
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    • pp.190-200
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    • 2014
  • In this study, the antioxidant activity and quality characteristics of the Korean traditional food jeung-pyun made with ju-bak powder were investigated. Jeung-pyun added with 10% ju-bak powder had a total polyphenol content of 54.27%, DPPH free radical scavenging activity of 91.98%, reducing power of 0.51% and SOD-like antioxidant activity of 18.21%. Jeung-pyun added with ju-bak powder had a moisture content of 52.65 to 46.94%, crude fat content of 1.61 to 1.29%, crude protein content of 3.50 to 4.66%, crude ash content of 0.68 to 0.82% and dietary fiber content of 0.12 to 1.46%. Ju-bak powder added with jeung-pyun had a pH level from 4.86 to 4.39. As ju-bak content increased, the pH decreased significantly. Color L value were 78.82 to 68.67. As ju-bak content increased, the Color L value content decreased significantly; a value ranged from -1.89 to 0.69 and b value from 2.99 to 14.25. As ju-bak content increased, the color content significantly increased. As ju-bak content increased, the volume significantly decreased (ranged from 42.50 to 30.00 mL), hardness, gumminess and chewiness significantly increased, and cohesiveness significantly decreased. From SEM, as ju-bak content increased, the pores merged and collapsed, whereas the number of pores decreased and pore size became larger. Sensory evaluation of color, flavor, taste, texture, appearance, cell uniformity and overall acceptability for various levels of ju-bak powder showed that 10% had the highest acceptability. Therefore, 10% ju-bak power added with jeung-pyun has both high antioxidant capacity and sensory acceptability.

Mitochondrially Targeted Bcl-2 and Bcl-XL Chimeras Elicit Different Apoptotic Responses

  • Liu, Sen;Pereira, Natasha Ann;Teo, Joong Jiat;Miller, Peter;Shah, Priya;Song, Zhiwei
    • Molecules and Cells
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    • v.24 no.3
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    • pp.378-387
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    • 2007
  • The Bcl-2 family of proteins interacts at the mitochondria to regulate apoptosis. However, the anti-apoptotic Bcl-2 and $Bcl-X_L$ are not completely localized to the mitochondria. In an attempt to generate Bcl-2 and $Bcl-X_L$ chimeras that are constitutively localized to the mitochondria, we substituted their C-terminal transmembrane tail or both the C-terminal transmembrane tail and the adjacent loop with the equivalent regions from Bak or Bax mutant (BaxS184V) as these regions determine the mitochondrial localization of Bak and Bax. The effects of these substitutions on subcellular localization and their activities were assessed following expression in HeLa and CHO K1 cells. The substitution of the C-terminal tail or the C-terminal tail and the adjacent loop of Bcl-2 with the equivalent regions from Bak or the Bax mutant resulted in its association with the mitochondria. This change in subcellular localization of Bcl-2 chimeras triggered cells to undergo apoptotic-like cell death. The localization of this Bcl-2 chimera to the mitochondria may be associated with the disruption of mitochondrial membrane potential. Unlike Bcl-2, the loop structure adjacent to the C-terminal tail in $Bcl-X_L$ is crucial for its localization. To localize the $Bcl-X_L$ chimeras to the mitochondria, the loop structure next to the C-terminal tail in $Bcl-X_L$ protein must remain intact and cannot be substituted by the loop from Bax or Bak. The chimeric $Bcl-X_L$ with both its C-terminal tail and the loop structure replaced by the equivalent regions of Bak or Bax mutant localized throughout the entire cytosol. The $Bcl-X_L$ chimeras that are targeted to the mitochondria and the wild type $Bcl-X_L$ provided same protection against cell death under several death inducing conditions.

A Note on Nitschkia confertula

  • Lee, Seon-Ju;Bak, Won-Chul;Kim, Kyung-Hee
    • Mycobiology
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    • v.30 no.3
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    • pp.180-182
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    • 2002
  • A fungus that grew over bed-logs of shiitake(Lentinula edodes) and caused damage was isolated from mushroom-growing farms. The fungus produced extensive mat-like dark subiculum with ascomata in it and was identified as Nitschkia confertula. This is the first report in Korea and morphological characteristics are fully described.

Morphopathogenesis o the abscess induced by Dermatophilus-like microorganism in mice (마우스에 있어서 Dermatophilus 양 균에 의한 농양의 형태 병리 발생)

  • Ha, Chang-su;Bak, Ung-bok
    • Korean Journal of Veterinary Research
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    • v.33 no.4
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    • pp.633-647
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    • 1993
  • NC strain mice were inoculated intraperitoneally with Dermatophoilus-like microorganism strain W254 isolated from the sulfur granules of the swine tonsils. The development of the resulting abscesses in NC strain mice was investigated at regular time intervals by means of histological, histochemical and electron microscopical methods. The results obtained were as follows ; 1. The inoculated bacteria have settled in the subserous site of the peritoneal organ and provoked cellular response to form neutrophil, macrophage and connective tissue layers at the time of one week after inoculation, and thereafter were found to have formed typical actinomycotic abscess two weeks after inoculation. 2. The persistant abscesses were appeared to reveal close interaction between higher activity of organism and tissue reaction and contained hyaloid bodies within or outside bacterial clumps. 3. The hyaline materials were appeared to be composed of protein rich in hydroxyphenyl group by histochemical examination. The materials were presumed to be produced by the interaction between bacterial activity and host cell reaction. 4. The bacteria in the abscesses showed the various developmental stages of coccoid body, mulberry-like body tuber-shaped body and filamentous body, and it was confirmed that the mesosomal development was related to septation of the bacterial cells.

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Phagocytic osteoclasts in the alveolar bone of diabetic rats with periodontitis

  • Bak, Eun-Jung;Kim, Ae Ri;Kim, Ji-Hye;Yoo, Yun-Jung
    • International Journal of Oral Biology
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    • v.45 no.3
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    • pp.92-98
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    • 2020
  • Periodontitis is a bacteria-induced inflammatory disease associated with alveolar bone loss. Osteoclast is a macrophage-lineage cell that exhibits phagocytic activity; however, osteoclast phagocytic activity has not been demonstrated under pathological conditions. Diabetes is a pathological condition that exacerbates alveolar bone loss via periodontitis; therefore, we examined phagocytic osteoclasts in diabetic rats that had periodontitis. The rats were divided into the control (C), periodontitis (P), and diabetes with periodontitis (DP) groups. Diabetes and periodontitis were induced by streptozotocin injection and ligature of the mandibular first molars, respectively. On days 3 and 20 after the ligature, the rats were sacrificed, and osteoclasts containing inclusions were quantified by tartrate-resistant acid phosphatase staining. On day 3, there were more osteoclasts containing inclusions in the DP group than in the C group. Among inclusions, osteocyte-like cells and dense bodies were more frequently observed in the DP group than in the C group. Cytoplasm-like structures were elevated more in the DP group than in the C and P groups. However, no differences were observed on day 20. Interestingly, some osteoclasts were in contact with the osteocytes within the exposed lacunae and contained several inclusions within a large vacuole. Thus, the elevation of phagocytic osteoclasts in rats with diabetes and periodontitis provides insight into the role of osteoclast phagocytic activity under pathological conditions.

Ambulatory Anesthesia Management of the Patient with Adrenoleukodystrophy for Dental Treatment -A Case Report- (부신백질이영양증 환자의 치과치료를 위한 외래전신마취 -증례 보고-)

  • Seo, Kwang-Suk;Bak, So-Yeon;Shin, Teo-Jeon;Kim, Hyun-Jeong
    • Journal of The Korean Dental Society of Anesthesiology
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    • v.10 no.1
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    • pp.45-49
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    • 2010
  • Adrenoleukodystrophy (ALD) is a rare X-linked genetic disorder associated with various central nervous system problems and adrenal insufficiency. It is common in childhood and symptoms include loss of previously acquired neurological abilities, seizures, ataxia, Addison's disease as well as degeneration of visual and auditory function. These children frequently require anesthesia during imagining procedure such as MRI or during some surgical procedures like gastrostomy. There is special need for careful management because of numerous anesthetic challenges like difficulty in cooperation, seizure disorders, life-threatening airway obstruction, copious oral secretion and possibility of aspiration. In addition, adrenal involvement and hypofunction must be considered for safe anesthesia management. We report a successful anesthetic management in a patient with ALD for dental procedures.

The study of movement of Tae-Geuk-Guan (태극권(太極拳)의 동작(動作)에 관(關)한 연구(硏究))

  • Jung, Min-sueb;Oh, Min-seok;Song, Tae-won
    • Journal of Haehwa Medicine
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    • v.10 no.1
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    • pp.385-394
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    • 2001
  • Tough study of movement of Tae-Geuk-Guan(太極拳), we understand Tae-Geuk-Guan(太極拳) & essential movement. Theory about creator of Tae-Geuk-Guan(太極拳) is indistinct. there are Jangsampung-theory(張三豊設), Wangjongak-theory(王宗岳設), Jinwangjung-theory(陳王廷設), Jinbok-theory(陳卜設). Tae-Geuk-Guan(太極拳) is military arts developed before Song empire(宋). Tae-Geuk-Guan(太極拳) has many branch.(Jin-sik陳式, Yang-sik楊式, Mu-sik武式 O-sik吳式, Son-sik孫式) Tae-Geuk-Guan'(太極拳) manual movement use fist(拳), palm(掌), hook shape(鉤) and its using form has many type like Bung, Yi, Jae, An, Chae, Yul, Ju, Go. Its gait has many type like Sang-bo(上步), Tae-bo(退步), Jin-bo(進步), Deng-gak, Bun-gak(分脚), Bak-gak(拍脚). Essential theory of Tae-Geuk-Guan(太極拳) is Yi-Sim-Hang-Gi(以心行氣) & Yi-Gi-Un-Sin(以氣運身). It means mind(心) moves qi(氣) and qi(氣) moves body(身).

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