초파리 망막 세포의 미세구조연구는 1960년대부터 수행되어 왔으나, 이 연구들은 2차원 구조연구에 국한되어 있었다. 본 논문은 초고압 동결법, 연속절편법, 초고압 전자현미경, 그리고 3차원 구조 구현법을 이용하여 초파리 성체의 망막 세포에 존재하는 미토콘드리아, 미세소관, 그리고 핵의 3차원 분포를 연구한 결과이다. 이를 통하여 미토콘드리아는 주로 세포막 가까이에 위치하며, 그 수는 렌즈와 가까운 말단부분에 많은 것을 알 수 있었고, 미세소관은 렌즈와 가까운 망막 말단부분과 시신경과 연결되는 기부에 특히 많은 수가 존재하는 것을 알 수 있었다. 이들은 망막 변성의 원인이 되는 세포 소기관이므로, 이들의 세포 내 3차원 분포는 병의 원인을 연구하는 데 있어 중요한 자료가 될 것으로 사료된다.
초파리 망막 세포의 미세구조연구는 1960년대부터 수행되어 왔으나, 이 연구들은 2차원 구조연구에 국한되어 있었다. 본 논문은 초고압 동결법, 연속절편법, 초고압 전자현미경, 그리고 3차원 구조 구현법을 이용하여 초파리 성체의 망막 세포에 존재하는 미토콘드리아, 미세소관, 그리고 핵의 3차원 분포를 연구한 결과이다. 이를 통하여 미토콘드리아는 주로 세포막 가까이에 위치하며, 그 수는 렌즈와 가까운 말단부분에 많은 것을 알 수 있었고, 미세소관은 렌즈와 가까운 망막 말단부분과 시신경과 연결되는 기부에 특히 많은 수가 존재하는 것을 알 수 있었다. 이들은 망막 변성의 원인이 되는 세포 소기관이므로, 이들의 세포 내 3차원 분포는 병의 원인을 연구하는 데 있어 중요한 자료가 될 것으로 사료된다.
Studies about the structure of Drosophila melanogaster retinal cell using electron microscopy have been carried out in details since 1960s. However, these results can have limitations in functional research because of two-dimensional structure. In this study, the adult retina of Drosophila melanogas...
Studies about the structure of Drosophila melanogaster retinal cell using electron microscopy have been carried out in details since 1960s. However, these results can have limitations in functional research because of two-dimensional structure. In this study, the adult retina of Drosophila melanogaster was investigated by employing high pressure freezing method, serial sections, high voltage electron microscopy, and 3-dimensional reconstruction method. From there results, mitochondria, microtubules, and nuclei were reconstructed as 3-dimensional structure using IMOD program. The 3D structure of these organelles showed that mitochondira mainly located in distal region near lens, and microtubule mainly located in distal and basal region. The 3D reconstruction of these organelles can be used for a critical evaluation in the dynamic change of cellular organelles caused by functional abnormality like retinal degeneration.
Studies about the structure of Drosophila melanogaster retinal cell using electron microscopy have been carried out in details since 1960s. However, these results can have limitations in functional research because of two-dimensional structure. In this study, the adult retina of Drosophila melanogaster was investigated by employing high pressure freezing method, serial sections, high voltage electron microscopy, and 3-dimensional reconstruction method. From there results, mitochondria, microtubules, and nuclei were reconstructed as 3-dimensional structure using IMOD program. The 3D structure of these organelles showed that mitochondira mainly located in distal region near lens, and microtubule mainly located in distal and basal region. The 3D reconstruction of these organelles can be used for a critical evaluation in the dynamic change of cellular organelles caused by functional abnormality like retinal degeneration.
* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.
가설 설정
3-D model of microtubule in Drosophila melanogaster retina. A: Surface model of 8 retinular cells. b-basal, d-distal.
b-basal, d-distal. B: The presence of nuclei and cross-section microtubules in ommatidium. N-nuclei, mt-microtubule.
N-nuclei, mt-microtubule. C: The presence of nuclei and cross-section microtubules in axon bundle. mt-microtubule.
제안 방법
, 2007). Therefore in this study, 3-dimensional reconstruction method using rapid freezing fixation, thick serial section, HVEM, and IMOD program were used for structural analysis of Drosophila retinal cells.
As a result, we could show that number of mitochondria is fewer at basal region than distal region and located near the plasmamembrane. This study provided the first detailed distribution of mitochondria in Drosophila retina through 3-dimensional reconstruction method using serial section. Because mitochondria are dynamic organelles that can change the shape, the 3D reconstruction is a good method for quantification of this organelle (Perkins & Frey, 2000).
후속연구
Therefore we could explain the cause for appearance of microtubules mainly at basal and distal sides. This study on distribution of microtubule can be of help to researches on the cause of retinal degeneration diseases like retinitis pigmentosa through various mutant lines.
참고문헌 (16)
Bravo-Nuevo A, Williams N, Geller S, Stone J: Mitochondrial deletions in normal and degenerating rat retina. Adv Exp Med Biol 533 : 241-248, 2003
Eckmiller MS: Defective cone photoreceptor cytoskeleton, alignment, feedback, and energetics can lead to energy depletion in macular degeneration. Prog Retin Eye Res 23(5) : 495-522, 2004
Grayson C, Bartolini F, Chapple JP, Willison KR, Bhamidipati A, Lewis SA, Luthert PJ, Hardcastle AJ, Cowan NJ, Cheetham ME: Localization in the human retina of the X-linked retinitis pigmentosa protein RP2, its homologue cofactor C and the RP2 interacting protein Arl3. Hum Mol Genet 11(24) : 3065-3074, 2002
Hama K, Arii T, Kosaka T: Three-dimensional organization of neuronal and glial processes: high voltage electron microscopy. Microsc Res Tech 29(5) : 357-367, 1994
Perkins GA, Ellisman MH, Fox DA: Three-dimensional analysis of mouse rod and cone mitochondrial cristae architecture: bioenergetic and functional implications. Mol Vis 9 : 60-73, 2003
Perkins GA, Ellisman MH, Fox DA: The structure-function correlates of mammalian rod and cone photoreceptor mitochondria: observations and unanswered questions. Mitochondrion 4(5-6) : 695-703, 2004
AI-Helper
※ AI-Helper는 부적절한 답변을 할 수 있습니다.