• Nutrition Research and Practice
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• 제18권1호
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• pp.62-77
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• 2024

BACKGROUND/OBJECTIVES: Colorectal cancer (CRC) is the third most common cancer worldwide with a high recurrence rate. Oxaliplatin (OXA) resistance is one of the major reasons hindering CRC therapy. β-Carotene (BC) is a provitamin A and is known to have antioxidant and anticancer effects. However, the combined effect of OXA and BC has not been investigated. Therefore, this study investigated the anticancer effects and mechanism of the combination of OXA and BC on CRC. MATERIALS/METHODS: In the present study, the effects of the combination of OXA and BC on cell viability, cell cycle arrest, and cancer stemness were investigated using HCT116, HT29, OXA-resistant cells, and human CRC organoids. RESULTS: The combination of OXA and BC enhanced apoptosis, G₂/M phase cell cycle arrest, and inhibited cancer cell survival in human CRC resistant cells and CRC organoids without toxicity in normal organoids. Cancer stem cell marker expression and self-replicating capacity were suppressed by combined treatment with OXA and BC. Moreover, this combined treatment upregulated apoptosis and the stem cell-related JAK/STAT signaling pathway. CONCLUSIONS: Our results suggest a novel potential role of BC in reducing resistance to OXA, thereby enhances the anticancer effects of OXA. This enhancement is achieved through the regulation of cell cycle, apoptosis, and stemness in CRC.

• 한국가축번식학회지
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• 제20권3호
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• pp.239-250
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• 1996

The objective of the present experiments were to determine whether micromanipulative and electro-stimulation conditions for blastomere survival overlapped those for oocyte activation in porcine. Eggs selected for in vitro development potential of blastomeres isolated from 4-cell embryos and oocyte activation by electrostimulation were equilibrated for 5~10 min, in 0.3M sucrose solution containing 7.5$\mu\textrm{g}$/ml cytochalasin B, and then electrostimulated for 30$\mu$sec using one pulse of 100, 120, 150 or 180 volts DC with electrodes 0.2mm apart. Single blastomeres were inserted into empty zona pellucida prior to electrostimulaticn. Then they were cultured in 20${mu}ell$ drops of fresh BECM to observe their developmental ability in vitro in a humidified incubat or at 38.5$^{\circ}C$. The results obtained from these experiments are as follows : 1. When one pulse of 100, 120, 150 or 180 volts DC for 30$\mu$sec were applied to porcine oocytes having the slit formed on zona pellucida for activation, activation rates were 65.1, 66.7, 70.7 and 91.7%, respectively. Higher activation rate was observed in 180V. 2. Infact oocytes incubated for 30 min, in 0.3M sucrose solution after electrostimulation were significantally different from control group with increasing of voltages(p<0.05). When voltages used for electrostimulation were increased, activation rates of oocytes were improved in all treatment groups. 3. When zona punctured-oocytes were only electrostimulated, or incubated in 0.3M sucrose solution for 30 min. after electrostimulation at 180 volt DC, activation rates were 90.5 and 95.5%, respectively. And activation rates of zona punctured-oocytes were significantly different from the groups for which zona pellucida was not punctured(P<0.05). 4. When single blastomeres form 4-cell transferred into empty zona pellucida were incubated for 0, 15 and 30 min. in 0.3M sucrose solution after electrostimulation using one pulse of 180 volt DC for 30 $\mu$sec, developmental rates of electrostimulated-single blastomeres to blastocyst were 72.5, 59.0 and 51.2%, respectively, and the ratio of control group developed to blastocyst were 80.0%. 5. The average cell number in electrostimulated-blastomeres developed to blastocyst were 7.9~10.8, and reduced than the cell number in diploid control ; Also cell number decreased with increasing of voltages. The results of these experiments indicate that the optimal condition for achieving in vitro developmental ability of single 4-cell blastomeres and oocyte activatin is 1 pulse, duration 30 $\mu$sec. in 180 volt, and incubation of blastomeres and oocytes in 0.3M sucrose solution after electrostimulation was not significantally different from another treatment groups. The results also show that this condition is suitable for nuclear transplantation using porcine eggs.

• 한국수정란이식학회지
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• 제15권2호
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• pp.175-180
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• 2000

The possible use of micromanipulative biopsy and PCR of the biopsied embryonic cells was tested to produce sexed bovine embryos in practical terms. By micromanipulation and PCR techniques, higher survival rate and accurate sexing of demi-embryos were btained. Bovine oocytes matured and fertilized in vitro were co-cultured with bovine oviductal epithelial cell (BOEC) monolayer in USU-6 medium supplemented with 15% FBS, and the embryos of 37% (327/885) were developed to blastocysts. Among 111 blastocysts produced by invitro, only 7 (6.3%) embryos were found unable to determine their sex, probably due to the loss of cells, since no PCR product was found from those cells. All the remaining 104 (93.7%) demi-embryos survived micromanipulation and demonstrated male-specific product or bovine-specific product alone suggesting that correct sexing of the sample. Forty-three point one percent(25/58) of manipulated and cryopreserved demi-embryos after thawing were survived. Final verification of the sexed embryos is necessary to make sure the same sex in fetus and newborn calf upon embryo transfer. The established sexing method on a large number of bovine embryos from previous and this study suggests that this a could be used practically in the field.

• Natural Product Sciences
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• 제8권4호
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• pp.155-161
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• 2002

The mistletoe lectins are major active components in the extract of European mistletoe (Viscum album L) that have been widely used in adjuvant chemotherapy of cancer. This study was performed to investigate the antitumor activity of extract of Korean mistletoe (Viscum album var. coloratum) modified with Korean mistletoe lectin (Viscum album var. coloratum agglutinin, VCA). Compared with the results of VCA, survival rate was increased and experimental lung metastasis was reduced by treatment of modified extract (VCM). In addition, the treatment of VCM reduced angiogenesis and VCA-induced toxicity measured by a CAM assay. And VCM inhibited proliferation and induced apoptosis in vitro in tumor cells originated from tissues which are possible to apply topically without surgery. Taken together, the antitumor activities of VCM-treated group outperformed the activities of the VCA-treated group.

• Journal of Veterinary Science
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• 제19권6호
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• pp.788-797
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• 2018

In many countries, vaccines are used for the prevention of foot-and-mouth disease (FMD). However, because there is no protection against FMD immediately after vaccination, research and development on antiviral agents is being conducted to induce protection until immunological competence is produced. This study tested whether well-known chemicals used as RNA virus treatment agents had inhibitory effects on FMD viruses (FMDVs) and demonstrated that ribavirin showed antiviral effects against FMDV in vitro/in vivo. In addition, it was observed that combining the administration of the antiviral agents orally and complementary therapy with vaccines synergistically enhanced antiviral activity and preserved the survival rate and body weight in the experimental animals. Antiviral agents mixed with an adjuvant were inoculated intramuscularly along with the vaccines, thereby inhibiting virus replication after injection and verifying that it was possible to induce early protection against viral infection prior to immunity being achieved through the vaccine. Finally, pigs treated with antiviral agents and vaccines showed no clinical signs and had low virus excretion. Based on these results, it is expected that this combined approach could be a therapeutic and preventive treatment for early protection against FMD.

• 대한한방소아과학회지
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• 제28권2호
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• pp.56-71
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• 2014

Objectives In this study, the author tried to investigate whether piryongbang-gamgil-tang (PGGT) significantly affect in vitro airway mucin secretion, PMA- or EGF- or TNF-${\alpha}$-induced MUC5AC mucin production / gene expression from human airway epithelial cells and increase in airway epithelial mucosubstances and hyperplasia of tracheal goblet cells of rats. Materials and Methods For in vitro experiment, confluent RTSE cells were chased for 30 min in the presence of PGGT to assess the effect of PGGT on mucin secretion by enzyme-linked immunosorbent assay (ELISA). Also, effect of PGGT on PMA- or EGFor TNF-${\alpha}$-induced MUC5AC mucin production and gene expression from human airway epithelial cells (NCI-H292) were investigated. Confluent NCI-H292 cells were pretreated for 30 min in the presence of PGGT and treated with PMA (10 ng/ml) or EGF (25 ng/ml) or TNF-${\alpha}$ (0.2 nM) for 24 hrs, to assess both effect of PGGT on PMA- or EGF- or TNF-${\alpha}$-induced MUC5AC mucin production by ELISA and gene expression by reverse transcription-polymerase chain reaction (RT-PCR). For in vivo experiment, the author induced hypersecretion of airway mucus and goblet cell hyperplasia by exposure of rats to $SO_2$ during 3 weeks. Effect of orally-administered PGGT during 2 weeks on increase in airway epithelial mucosubstances from tracheal goblet cells of rats and hyperplasia of goblet cells were assesed by using histopathological analysis after staining the epithelial tissue with alcian blue. Possible cytotoxicities of PGGT in vitro were assessed by examining LDH release from RTSE cells and the rate of survival and proliferation of NCI-H292 cells. In vivo liver and kidney toxicities of PGGT were evaluated by measuring serum GOT/GPT activities and serum BUN/creatinine concentrations of rats after administering PGGT orally. Results (1) PGGT did not affect in vitro mucin secretion from cultured RTSE cells. (2) PGGT significantly inhibited PMA-, EGF-, and TNF-${\alpha}$-induced MUC5AC mucin productions and the expression levels of MUC5AC mRNA from NCI-H292 cells. (3) PGGT decreased the amount of intraepithelial mucosubstances and showed the tendency of expectorating airway mucus already produced. (4) PGGT increased LDH release from RTSE cells. However, PGGT did not show in vivo liver and kidney toxicities and cytotoxicity to NCI-H292 cells. Conclusion The result from this study suggests that PGGT can regulate the production and gene expression of airway mucin observed in diverse respiratory diseases accompanied by mucus hypersecretion and do not show in vivo toxicity to liver and kidney functions after oral administration. Effect of PGGT with their components should be further studied using animal experimental models that reflect the diverse pathophysiology of respiratory diseases through future investigations.

• Korean Journal of Acupuncture
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• 제18권1호
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• pp.1-9
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• 2001

애엽으로 약침액을 조제하여 암예방 효과를 살펴 본 결과 다음과 같은 결론을 얻었다. 애엽 약침액으로 10일간 전투여한 후 Ehrlich ascites tumor cell을 이식하여 복수암이 유발된 생쥐의 EATC 성장을 살펴 본 결과 약침액을 투여한 생쥐의 EATC의 성장이 크게 억제되었으며, 복수암이 유발된 생쥐의 비장 무게가 대조군에 비해 증가하였다. 또한 장기간의 관찰에 의해서도 복수암 세포의 성장 저해에 의해 생쥐의 체중변화율은 대조군에 비해 크게 억제되었으며 수명 연장 효과가 나타났다. 이와같은 생체에서의 암예방 효과를 in vitro 상에서 그 기전을 살펴본 결과 애엽 약침액은 phase II detoxification 효소인 QR의 생성을 유도하고 GSH 함량을 증가시켜서 암예방 효과를 나타내었다.

• Plant Biotechnology Reports
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• 제3권3호
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• pp.175-182
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• 2009

Simple, reproducible, high frequency, improved plant regeneration protocol in Eastern Cottonwood (Populus deltoides) clones, WIMCO199 and L34, has been reported. Initially, aseptic cultures established from axillary buds of nodal segments from mature plus trees on MS liquid medium supplemented with $0.25mg\;1^{-1}$ KIN and $0.25mg\;1^{-1}$ IAA. Nodal and internodal segments were found to be extra-prolific over shoot apices during course of aseptic culture establishment, while $0.25mg\;1^{-1}$ KIN concentration played a stimulatory role in high frequency plant regeneration. Diverse explants, such as various leaf segments, internodes, and roots from in vitro raised cultures, were employed. Direct plant regeneration was at high frequency of 92% in internodes, 88% in leaf segments, and 43% in root segments. This led to the formation of multiple shoot clusters on established culture media with rapid proliferation rates. Many-fold enhanced shoot elongation and growth of the clusters could be achieved on liquid MS medium supplemented with borosilicate glass beads, which offer physical support for proliferating shoots leading to faster growth in comparison to semi-solid agar or direct liquid medium. SEM examination of initial cultures confirmed direct plant regeneration events without intervening calli. In vitro regenerated plants induced roots on half-strength MS medium with $0.15mg\;1^{-1}$ IAA. Rooted 5- to 6-week-old in vitro regenerated plants were transferred into a transgenic greenhouse in pots containing 1:1 mixture of vermicompost and soil at $27{\pm}2^{\circ}C$ for hardening and acclimatization. 14- to 15-week-old well-established hardened plants were transplanted to the field and grown to maturity. The mature in vitro raised poplar trees exhibited a high survival rate of 85%; 4-year-old healthy trees attained an average height of 8 m and an average trunk diameter of 25 cm and have performed well under field conditions. The regeneration protocol presented here will be very useful for undertaking genetic manipulation, providing a value addition to Eastern Cottonwood propagation in future.

• 약학회지
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• 제38권2호
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• pp.191-196
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• 1994

Higenamine is a tetrahydroisoquinoline alkaloid which was isolated as a cardiotonic principle from Aconiti tuber. 1.v. injection of higenamine was reported to increase the cardiac output and heart rate and to decrease the blood pressure and the systemic vascular resistance presumably by stimulating the adrenergic ${\beta}-receptors$. The anti-platelet and anti-thrombotic effects of higenamine were investigated in this paper. Higenamine(0.5 mg/ml) showed mild inhibitory effect against collagen induced platelet aggregation in vitro and the inhibito교 effect was increased with the pre-incubation$(5{\sim}30\;min)$ of platelet rich plasma(PRP) with higenamine. With the 30 min incubation, the platelet aggregation was almost completely inhibited. And the oral administration of higenamine$(50{\sim}200\;mg/kg)$ enhanced the survival in the mouse model of thrombosis and that of endotoxic shock. The anti-thrombotic and anti-septic effects of higenamine thus appear to be due to the ${\beta}-agonistic$ and the anti-platelet effects of this compound.

• 한국작물학회지
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• 제47권3호
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• pp.186-188
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• 2002

생물반응기에서 배양 수확한 신초의 발근과 순화조건을 알기 위하여 실험한 결과는 다음과 같다. 배양배지는 MS 기본배지의 농도를 반으로 줄이고 아가 농도를 1.2%로 하는 것이 신초의 발근과 순화에 유리하였다. 여과막이 부착된 배양병에서 신초를 생육시키는 것이 밀폐된 배양병에서 생육시킨 것보다 생육이 양호하고 생존율도 높았다. 배지에 paclobutrazol을 0.3-0.4mg/l로 처리한 경우 신초의 발근과 생육이 양호하였다.