• Journal of Microbiology and Biotechnology
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• 제17권12호
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• pp.1944-1948
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• 2007

Silkworm hemolymph (SH), prepared from fifth-instar larvae of Bombyx mori and heat-treated at $60^{\circ}C$ for 30 min, was used to improve cell viability and the production of human cytotoxic T-lymphocyte antigen 4-immunoglobulin (hCTLA4Ig) in transgenic Oryza sativa L. cell suspension cultures. Even though SH could not elevate cell viability at the concentrations up to 3% (v/v), addition of 0.3% (v/v) SH to a culture medium enhanced the production of hCTLA4Ig by 36.8% over an SH-free medium. Moreover, the production period of hCTLA4Ig could be shortened in a 0.3% (v/v) SH-added medium compared with that in an SH-free culture. As a result, addition of 0.3% (v/v) SH improved the productivity of hCTLA4Ig significantly in transgenic rice cell cultures.

• Biotechnology and Bioprocess Engineering:BBE
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• 제11권4호
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• pp.364-367
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• 2006

In order to enhance the repair of defects in articular cartilage via cell therapy with autologous chondrocytes, as well as with periosteum-derived progenitor cells (PDPCs), silkworm hemolymph (SH) and a variety of cartilage-specific extracellular matrices (ECMs) including type II collagen, proline, chondroitin 4-sulfate, and chondroitin 6-sulfate were assessed with regard to their efficacy as media supplements. SH, a known anti-apoptotic agent, was found to enhance cell growth, as was shown by the results of a 3-(4,5-dimethylthiazol-2yl)-2,5-diphenyltetrazolium bromide (MTT) assay. According to the results of reverse transcriptase polymerase chain reaction (RT-PCR) analyses, the cartilage-specific ECMs were found to stimulate the expression of hyaline cartilage-specific genes, most notably type II collagen and Sox9, in monolayer cultures of PDPCs.

• KSBB Journal
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• 제20권3호
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• pp.233-237
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• 2005

누에체액 성분 중의 30K 단백질은 Q-Sepharose FF를 이용한 단계별 농도구배 이온교환 크로마토그래피로 0.16 M NaCl 용출 조건에서 쉽게 얻을 수 있었다. 얻어진 단백질을 인간유래 정상세포에 처리하여 세포 증식 향상이 확인되었고, 이는 30K 단백질이 인간을 위한 세포치료제에 이용되는 세포의 증식을 위한 첨가물로 사용될 수 있음으로써 의료 분야에의 적용 가능성을 확인하였다. 또한 본 연구를 통해 확립된 30K 단백질의 간단한 정제 공정은 향후 대량 생산 공정으로 scale-up이 용이하게 이루어질 것으로 기대된다. 이 결과들은 동물세포를 생산 숙주로 사용할 때 생산 물질 자체의 생산량 증대에도 효과적으로 이용될 수 있으며 세포치료제를 위한 세포의 증식에도 효과를 보일 수 있으므로 세포배양을 이용한 생산 공정 전반에 큰 영향을 미칠 수 있을 것이다.