• 제목/요약/키워드: $LD_{50}$

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The Review on the Study of Bee Venom in the domestic papers (최근 10년간 국내의 봉독 관련 연구에 대한 고찰)

  • Lee, Hong-seok;Lee, Jae-dong;Koh, Hyung-kyun
    • Journal of Acupuncture Research
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    • v.20 no.3
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    • pp.154-165
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    • 2003
  • Objective : to research the trend of the study related to Bee venom and o establish the hereafter direction for the study on Bee Venom therapy. Methods : We reviewed the domestic papers published last ten years(1992-2001). Results: 1.We have searched 53 papers in 7 journals and the pattern of study was as follow: the experimental studies were 33, the clinical studies were 10 and the reviewed studies were 10. 2. The experimental studies were 2 papers of analysis of Bee Venom, 3 papers of safety assessment, 1 paper on production of antibody against Bee Venom and 26 paper of safety assessment. 3. Bee Venom used in studies was made in Korea, China and U.S.A.. There were differences of component and effect according to the place of production. 4. There were the experimental studies of LD50 in mouse, acute toxicity, local irritation test, antigenicity and pyrogen test of Bee Venom. Conclusions : We need more studies of unification of term about Bee Venom, difference according to the place of production, clinical safety and effects.

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Pharmaceutical Study on Ketoprofen Lysinate (Ketoprofen Lysinate의 약제학적(藥劑學的) 연구(硏究))

  • Lee, Wan-Ha;Kim, Jang-Bae;Jee, Ung-Kil;Rhyu, Byung-Tae
    • Journal of Pharmaceutical Investigation
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    • v.12 no.2
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    • pp.37-44
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    • 1982
  • In order to enhance water solubility, ketoprofen was made as lysine salt, such as acetylsalicylic acid lysine salt, ibuprofen lysine salt and amino acid salt of phenylbutazone. The purpose of this study was to make a comparison between ketoprofen lysine salt in aspects of analgesic, anti-inflammatory, and antipyretic effect. The experimental results were summerized as followings. 1. Ketoprofen lysinate was composed of one molecule of ketoprofen and one molecule of lysine. The product was water soluble and melting point was $92^{\circ}C{\sim}94^{\circ}C$. 2. Ketoprofen lysinate showed about 2 times stronger analgesic effect than that of ketoprofen while no difference in antipyretic effect was observed. 3. $LD_{50}$ of ketoprofen lysinate was higher than that of ketoprofen, suggesting ketoprofen lysinate as safer drug. 4. Blood concentration of ketoprofen lysinate was $156{\mu}g/ml$ while the concentration of ketoprofen was $116{\mu}g/ml$ in 30 min., suggesting long acting as well as high blood concentration.

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Influence of Panax Ginseng on the Hypothermia in Rats Elicited by Various Drugs (인삼(人蔘)의 각종약물투여(各種藥物投與)로 인(因)한 체온하강(體溫下降)에 미치는 영향(影響))

  • Kim, Young-Soo
    • The Korean Journal of Pharmacology
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    • v.2 no.1 s.2
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    • pp.83-97
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    • 1966
  • Attempts have been made upon the temperature response of the rat induced by some central nervous system depressants as well as stimulants, so as to secure some hidden facets of Panax Ginseng acting upon central nervous system. Although considerable works have been done with regard to Panax Ginseng, it is quite apparent that neither definite implication in terms of its effective chemical constituents is with us nor its pharmacological activity thus far. The author could, however, arrive at some results through procedures preceded by intraperitoneal administration of various drugs in combination with Panax Ginseng in albino rats, that is: (1) Nembutal and chlorpromazine displayed a highly inhibitory effect upon temperature response in the presence of Panax Ginseng, while meprobamate, reserpine, phenacetin and aspirin exerted potentiation actions upon hypothermia. Phenobarbital, serotonin and histamine, on the contrary, did not appear to produce any effect of significance. (2) Nembutal with Panax Ginseng caused prolongation of hypnosis in rat, whereas sodium phenobarbital did not have any effect on it. (3) $LD_{-50}$ in each experimental group of administration of central nervous system stimulants such as strychnine, picrotoxin with Panax Ginseng, necessitated marked increase in the lethal doses. The observations from this study seemed to imply that the complicated mechanism of action of Panax Ginseng might be referred to both central nervous depressive action and influence to basal metabolic rate of mammalian.

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A Study on the Acute Toxicity of Palmultang and Fermented Palmultang Extract in ICR Mice (ICR 마우스를 이용한 팔물탕 및 발효팔물탕의 급성독성 연구)

  • Jung, Kiyoun;Hwang, Youn-Hwan;Jang, Doorye;Ha, Jeong-Ho;Ma, Jin Yeul
    • Journal of Society of Preventive Korean Medicine
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    • v.17 no.1
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    • pp.117-124
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    • 2013
  • Objectives : This study was carried out to investigate the acute toxicity and safety of Palmultang and Fermented Palmultang Extract in Mice. Methods : To evaluate their acute toxicity and safety, 0 (control group), 2000 mg/kg of Palmultang and Fermented Palmultang Extracts were orally administered to 15 male and 15 female ICR mice. After a single administration, we observed survival rates, behavioral pattern, clinical sign, body weight. The results of biochemical analysis and hematological analysis were no any significant change. Results : Compared with the control group, we could not find any toxic alteration in all treated mice. Conclusions : Overall, the results suggest that, the oral administration of Palmultang and Fermented Palmultang extracts did not produce significant toxic effect in mice. Hence, the fermented extract can be utilized for herbal therapy.

Acute and Subacute Toxicity of l-Muscone in Beagle Dogs (비글개에서 l-muscone의 급성독성 및 아급성독성시험 연구)

  • 유아선;권오경;성하정;곽형일;방명주;박대규;정규혁;윤효인;조명행
    • Toxicological Research
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    • v.13 no.4
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    • pp.449-460
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    • 1997
  • Single and 4 weeks oral administration of l-muscone, a major active ingredient of musk, to beagle dogs of both sexes were performed to investigate both acute and subacute toxicity. Beagle dogs(3 males and 3 females) in acute experiments were administered orally with single dosage of 2,000 mg/kg and groups of 9 male and 9 female beagle dogs in subacute experiments were given daily different dosage of l-muscone, 0.2 mg/kg/day(low dosage group), 2 mg/kg/day(middle dosage group), or 20 mg/kg/day(high dosage group) once a day for 4 weeks by oral route according to the Established Regulation of Korean Food and Drug Administration(1996.4.16). $LD_{50}$ value for beagle dogs was more than 2,000 mg/kg on oral route for both male and females. In animals administered with l-muscone, there were neither dead animals nor significant changes of body weights. In addition, no differences were found between control and treated groups in clinical signs, urinalysis, eye examination, hematology, serum chemistry, organ weight and other findings. No histolopathological lesions were observed in both control and treatment groups. Above data strongly suggest that l-muscone in beagle dogs is considered to be safe.

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Single Dose Toxicity Studies of the Bamboo Salt (Jukyum) in rats (죽염에 대한 단회투여 독성시험연구)

  • 김준규;이봉훈;서경원;박미경;박창원;안진홍;홍충만;조대현
    • Toxicological Research
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    • v.17 no.4
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    • pp.273-277
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    • 2001
  • Though the bamboo salt, called as "JUKYUM" has been widely used in Korea as panacea, it's toxicity were not screened completely. To investigate the toxicity of bamboo salt, we compared with the toxicity of crude salt and reagent-grade NaCl by performing single dose oral toxicity test in SD rats. Crude salt, natural sun-dried salt (crude salt) production, was purchased from the western seashore of Korean peninsular, and reagent-grade NaCl was purchased from Sigma company. Results of the single dose oral toxicity tests on bamboo salt, crude salt and reagent-grade NaCl to SD rats are as follows, $LD_{50}$ of bamboo salt was 4174mg/kg (male) and 4074mg/kg (female), that of crude salt was 4871mg/kg (male) and 4898mg/kg (female) and that of reagent-grade NaCl was 4247mg/kg (male) and 4025mg/kg (female), respectively. There were little differences in clinical signs and gross legions among groups. Finding of gross autopsy and necropsy of bamboo salt treated group were similar to other groups.er groups.

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Acute and Subacute Toxicity Studies of Water Soluble Dimethyl Dimethoxy Biphenylate Derivative in Rats (수용성 DDB유도체의 주사제 개발을 위한 급성독성 및 아급성독성시험연구)

  • 김준규;박창원;이윤숙;김정구;이치호;조대현
    • Toxicological Research
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    • v.13 no.4
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    • pp.423-433
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    • 1997
  • The acute and subacute toxicity of water soluble dimethyl dimethoxy biphenylate derivative (new DDB), hepatitis therapeutics, were investigated in SD rats. In the acute toxicity study, body weights and clinical signs were observed for 7 days after the intravenous injection of new DDB at doses of 140, 182, 236, 307 and 400 mg/kg(r=1.3). Death. Severe convulsion, tremor and decrease motor activity were observed in almost treated groups (except the 140 mg/kg treated group). Changes of body weight in treated groups were not significantly different from control group. Autopsy of survived animals revealed no abnormal gross findings related to new DDB. As a results, the $LD_{50}$ values of new DDB were 244.1 mg/kg for male and 232.5 mg/kg for female. In subacute toxicity study, body weights and clinical signs were observed after intravenous injection of new DDB at doses of 57, 75 and 100 mg/kg/day for 28 days. Death, decrease motor activity and tremor were observed above 75 mg/kg treated groups. Statistically significant changes were observed in hematological and biochemical parameters of new DDB-treated groups; however, these changes were within normal range and had no relationship with dosage. Several abnormal findings were observed in microscopic examination of tissue; however, these findings were not caused by new DDB but environmental factor. The no toxic dose level of new DDB were estimated to be 57 mg/kg/day in this study.

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Pharmacological Screening of Dikamali Resin Extract

  • Sridhar, S.K.;Ramachandran, S.;Anbalagan, N.;Leonard, J. Thomas;Joanofarc, J.;Kumar, S. Sadish
    • Natural Product Sciences
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    • v.9 no.1
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    • pp.10-12
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    • 2003
  • In the present study, dikamali resin (obtained from the leaf buds and the young shoots of Gardenia gummifera Linn.) was extracted with diethyl ether and the extract was vacuum dried. Qualitative tests confirmed the presence of flavonoids and free phenolic compounds in the extract. The antioxidant property (qualitative) of the extract was performed by TLC method $({\beta}-carotene-linoleate method)$. The $LD_{50}$ of the extract was found to be 2227 mg/kg by Karber's arithmetic method. The extract was screened for analgesic, anti-inflammatory, antipyretic (100, 200 and 400 mg/kg) and anthelmintic (0.1,0.2 and 0.5%w/v) activities by standard methods. The extract exhibited antioxidant property and prevented oxidation of ${\beta}-carotene$. The extract exhibited significant graded dose response for analgesic, anti-inflammatory, antipyretic and anthelmintic activities. The extract caused the death of earthworms in all experimental concentration whereas the standard drug (piperazine) only effected paralysis. The present study proved the claims of dikamali resin mentioned in the Indian system of medicine.

Pharmacological Studies on Prunellae Herba and Thesii Herba (II) -On Central Nervous and Diuretic Actions- (한국산(韓國産) 하고초류(夏枯草類)의 약물학적(藥物學的) 연구(硏究)(II) -중추신경(中樞神經) 및 이뇨작용(利尿作用)에 대하여-)

  • Ko, In-Ja;Yoo, Seung-Jo;Lee, Eun-Bang
    • Korean Journal of Pharmacognosy
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    • v.17 no.3
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    • pp.242-247
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    • 1986
  • This study is an attempt to investigate the effects of the water extracts of the whole plants of Prunella vulgaris (Labiatae) and Thesii chinense (Santalaceae) on the acute toxicity, the activities on central nervous system and the diuretic action. The acute toxicities shown by $LD_{50}$ were estimated to be more than 3000 mg/kg p.o. and 1,000 mg/kg s.c. in the extracts of Prunellae Herba and Thesii Herba, respectively, in mice. The extracts at a dose of 2,000 mg/kg p.o. did not show any activities on central nervous system, i.e, sedative, analgesic, hypothermic and anticonvulsant actions. The urination in rats was increased by 45.5% and 57.6% when 100mg/kg of each of the extracts were given orally. The results obtained revealed that the water extracts possessed weak diuretic actions without any of central nervous system activities. Furthermore, it is considered that the potassium in the extract may play a role in the diuretic action.

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Skin Safety Evaluation of Pectin Lyase-modified Red Ginseng Extract (GS-E3D) (홍삼가수분해농축액(GS-E3D)의 피부 안전성 평가)

  • Pyo, Mi Kyung;Lee, Gyeong Hee;Cha, Seon Woo;Park, Ki Young;Lee, Ki Moo
    • Korean Journal of Pharmacognosy
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    • v.49 no.3
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    • pp.246-254
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    • 2018
  • Pectin lyase-modified red ginseng extract (GS-E3D) is a newly developed ginsenoside Rd-enriched ginseng extract. This study was designed to investigate the skin safety of GS-E3D. Single oral toxicity, single dermal toxicity, bovine corneal opacity and permeability (BCOP) assay, skin irritation test with $SkinEthic^{TM}$ human epidermis model, skin sensitization local lymph node assay, and human patch test, were examined. The oral and dermal $LD_{50}$ value of GS-E3D was over 2,000 mg/kg in rats. GS-E3D was identified as a non-irritant to skin in BCOP assay, human epidermis models, and patch test from the 32 human subjects. The skin sensitization potential of GS-E3D was less than 25% in local lymph node assay. These results indicate that GS-E3D can be used as a safe ingredient without adverse effects in various skin care products.