20 research outputs found
๋ง์ฐ์ค์์ ๋ชจ์ฒด๋ฅผ ํตํด ์ป์ Naegleria fowleri ๋ฉด์ญ์ ๊ดํ ์ฐ๊ตฌ
์ํ๊ณผ/๋ฐ์ฌ[์๋ฌธ]
[ํ๊ธ]
์ธ์ฒด์์ ์๋ฐ์ฑ ๋์๋ง์ผ์ ์ผ์ผํค๋ Naegleria fowleri๋ ์์ฐํ๊ฒฝ์์ ๊ฒ์ถ๋๋ ๋ณ
์์ฑ์ด ๊ฐํ ์์ ์ํ์๋ฉ๋ฐ์ ์ผ์ข
์ผ๋ก ์ด์ ์ํ ๋ฐ๋ณ์ ์ด๋ฅธ๋ณด๋ค ์ด๋ฆฐ์ด์์ ๊ทธ ๋น๋
๊ฐ ๋์ ํธ์ด๋ค.
N. fowleri์ ์๋๋ฉด์ญ์ ๋ํด์๋ ํ์ฌ๊น์ง ๋ณ๋ก ์๋ ค์ง ๋ฐ๊ฐ ์์ผ๋ฏ๋ก ๋ณธ ์ฐ๊ตฌ์์๋
๋ง์ฐ์ค์ ์์ด ์์ ์ค ์ด๋ฏธ๋ง์ฐ์ค์ ๋ถ์ฌํ ๋ฉด์ญ์ด ํ๋ฐ์ ํตํ์ฌ ํ์ค(่ไธญ)์ธ ๋ง์ฐ์ค
์ ์ ๋ฌ๋๋์ง ๋๋ ๋ถ๋งํ์ ์์ (ๆไนณ)๋ฅผ ํตํ์ฌ ๊ทธ ๋ฉด์ญ์ด ์ ๋ฌ๋๋์ง๋ฅผ ์์๋ณด๊ณ ์
ํ์๋ค.
N. fowleri ์์ํ 0359์ฃผ(ๆ ช)๋ 37โ ํญ์จ๊ธฐ ๋ด์์ CGVS๋ฐฐ์ง๋ฅผ ์ฌ์ฉํ์ฌ ๋ฌด๊ตฐ์ ์ผ๋ก
๋ฐฐ์ํ์์ผ๋ฉฐ ์คํ๋๋ฌผ๋ก ICR๋ง์ฐ์ค๋ฅผ ์ฌ์ฉํ์๊ณ ์๋ผ ๋ง์ฐ์ค๋ 3โผ4์ฃผ ๋์ ์์ ์ํจ
ํ N. fowleri๋ฅผ ๊ฐ์ผ ์์ผฐ๋ค.
์์ ์ด ํ์ธ๋ ํ 1์ฃผ ๋๋ 2์ฃผ๋ถํฐ ์ด์์๋ N. fowleri ์์ํ์ 1์ฃผ์ผ ๊ฐ๊ฒฉ์ผ๋ก 2ํ
์ฃผ์
์์ผ ๋ฉด์ญ์์ผฐ๋ค. ๋ง์ฐ์ค๋ฅผ secobarbital๋ก ๋ง์ทจ์ํจ ํ N. fowleri์์ํ 5ร10**4
๊ฐ๊ฐ ํจ์ ๋ ์๋ฆฌ์์ผ์ ๋ถ์ ์ก 5ฮผl๋ฅผ ๋น๊ฐ๋ด๋ก ๋จ์ด๋จ๋ ค ๊ฐ์ผ์์ผฐ๋ค.
์คํ๊ตฐ๊ณผ ๋์กฐ๊ตฐ์ ๋ค์๊ณผ ๊ฐ์ด ๋ถ๋ฅํ์๋ค. ์ฆ ์คํ โ
๊ตฐ์ ์ด๋ฏธ๋ง์ฐ์ค๋ฅผ N. fowleri
๋ก ๋ฉด์ญ์ํค๊ณ ํ์ด๋ ์๋ผ๋ง์ฐ์ค์๊ฒ ๊ทธ ๋ชจ์ ๋ฅผ ๋จน์ธ ์คํ๊ตฐ์ด๊ณ , ์คํ โ
ก๊ตฐ์ ๋ฉด์ญ๋
์ด๋ฏธ๋ง์ฐ์ค์์ ํ์ด๋ ์๋ผ๋ง์ฐ์ค์๊ฒ ๋ฉด์ญ์ด ์๋ ์ ์ ์ด๋ฏธ๋ง์ฐ์ค์ ๋ชจ์ ๋ฅผ ๋จน์ธ ์คํ
๊ตฐ์ด๋ค. ์คํ โ
ข๊ตฐ์ ์๋ฆฌ์์ผ์๋ฅผ ๋ณต๊ฐ๋ด๋ก ์ฃผ์
์ํจ ์ ์ ๋ง์ฐ์ค๋ก๋ถํฐ ํ์ด๋ ์๋ผ๋ง
์ฐ์ค์๊ฒ ๋ฉด์ญ์ํจ ์ด๋ฏธ๋ง์ฐ์ค์ ๋ชจ์ ๋ฅผ ๋จน์ธ ์คํ๊ตฐ์ด๋ฉฐ, ์คํโ
ฃ๊ตฐ์ ๋ณต๊ฐ๋ด๋ก ์๋ฆฌ์์ผ
์๋ฅผ ์ฃผ์
์ํจ ์ด๋ฏธ๋ง์ฐ์ค์์ ํ์ด๋ ์๋ผ์๊ฒ ๊ทธ ๋ชจ์ ๋ฅผ ๋จน์ธ ๋์กฐ๊ตฐ์ด๋ค.
์ด๋ฏธ๋ง์ฐ์ค๋ฅผ ๋ฉด์ญ์ํจ ํ ์ด๋ฏธ์ ์ด๋ก๋ถํฐ ํ์ด๋ ์๋ผ๋ง์ฐ์ค ํ์ฒญ ๋ด์์ N. fowleri
์ ๋ํ ํญ์ฒด๊ฐ๋ฅผ ํจ์ํ์ ๋ฉด์ญ๊ฒ์ฌ๋ฒ (enzyme linked immunosorbent assay, ELISA)์ผ๋ก
์ธก์ ํ์๋ค.
์์ 2โผ3์ฃผ์ ๋ฉด์ญ์์ผฐ์ ๊ฒฝ์ฐ ์คํ๊ตฐ โ
, โ
ก, โ
ข์์ N. fowleri ๊ฐ์ผ์ผ๋ก ์ธํ ๋ง์ฐ
์ค์ ์ฌ๋ง์จ์ ๋์กฐ๊ตฐ์ ๋นํด ํ์ ํ ๋ฎ์์ผ๋ฉฐ ์์กด๊ธฐ๊ฐ์ ๋์กฐ๊ตฐ์ ๋นํด ํฐ ์ฐจ์ด๊ฐ ์์
๋ค. ์์ 1โผ2์ฃผ์ ๋ฉด์ญ์์ผฐ์ ๊ฒฝ์ฐ ์คํ๊ตฐ โ
, โ
ก, โ
ข์ ๋ง์ฐ์ค ์ฌ๋ง์จ์ ๋์กฐ๊ตฐ๊ณผ ๋น๊ต
ํ ๋ ํฐ ์ฐจ์ด๊ฐ ์์๊ณ ์์กด ๊ธฐ๊ฐ๋ ๋์กฐ๊ตฐ์ ๋นํด ์ฐจ์ด๊ฐ ์์๋ค.
N, fowleri๋ฅผ ๋ง์ฐ์ค ๋ณต๊ฐ๋ด์ ๋์ฐจ๋ก ์ฃผ์
์์ผ ๋ฉด์ญ์ํจ ํ ๋งค์ฃผ ์ธก์ ๋ ํญ์ฒด๊ฐ๋ ์
์ฐจ ์ฆ๊ฐํ์๊ณ ๋ฐ๋ผ์ ์ํํ ๋ฉด์ญ๋ฐฉ๋ฒ์ด ํจ๊ณผ์ ์์ ์ ์ ์์๋ค. ์๋ผ๋ง์ฐ์ค๋ฅผ 3โผ4์ฃผ
๋์ ์์ ์ํจ ํ N. fowleri๋ก ๊ฐ์ผ์ํค๊ธฐ ์ง์ ์ ํ์ฒญ๋ด์ ํญ์ฒด๊ฐ๋ฅผ ์ธก์ ํ์์ ๋ ์ค
ํ๊ตฐ โ
, โ
ก, โ
ข ๋ชจ๋์์ ๋์กฐ๊ตฐ๋ณด๋ค ๋์ ํญ์ฒด๊ฐ๋ฅผ ๋ํ๋ด์๋ค.
์ฌ๋งํ ๋ง์ฐ์ค์ ๋์กฐ์ง์์ N. fowleri ๊ฐ์ผ์ ์ํ ์๋ฉ๋ฐ์ฑ ๋์๋ง์ผ์ ์ผ์ฆ์๊ฒฌ์
๊ด์ฐฐํ ์ ์์๋ค.
์ด์์ ์คํ์ฑ์ ์ผ๋ก ๋ณด์ ์ด๋ฏธ ๋ง์ฐ์ค์ N. fowleri๋ก ๋ฉด์ญ์ํค๋ฉด ์ด๋ก๋ถํฐ ํ์ด๋ ์
๋ผ๋ง์ฐ์ค๋ ๋ฐฉ์ด๋ฉด์ญ์ ๊ฐ์ง๊ณ ์์ผ๋ฉฐ, ์ด๋ฌํ ์๋๋ฉด์ญ์ ์ด๋ฏธ๋ก๋ถํฐ ์๋ผ๋ง์ฐ์ค๋ก ํ๋ฐ
์ ํตํ์ฌ ์ ๋ฌ ๋ ๋ฟ๋ง์๋๋ผ ๋ชจ์ ๋ฅผ ํตํด์๋ ์ ๋ฌ๋๋ค๋ ๊ฒฐ๋ก ์ ์ป์๋ค.
Experimental Study on Vertical Transmission of Immunity Against Naegleria fowleri
Myoung-Hee Ahn
Department of Medical Science The Graduate School, Yonsei University
(Directed by Professor Keun-Tae Lee, M.D. and Professor Kyung-Il Im. H.D.)
Naegleria fowleri, a highly pathogenic free-living amoeba, has been recognized as
a causative agent of fatal meningoencephalitis in humans, especially in young
children.
Several studies have shown that maternal (colostral and/or transplacental)
antibody may passively protect the newborn against infectious agents prior to the
acquired immunity.
The present investigation was aimed to study the effect of vertical transmission
of immunity against N. fowleri infection from dams to offsprings in murine model.
Naegleria fowlers, strain 0359, cultivated axenically in CGVS medum at 37โ was
employed as an experimental pathogen. Male and female ICR mice were mated for two
weeks with 3:2 ratio, respectively. Pregnant mice were immunized by intraperitoneal
inoculation of live trophozoites of N. fowlers, with an inoculum of 1ร10**5
amoebae once a week for 2 times. Immunization was done on the 2nd and 3rd week
gestation. Immediately after the delivery, the newborns were mated either with
their dams (Immunized vs. non-immunized) or with foster mothers (immunized vs.
non-immunized), and were fed milk for 3 to 4 weeks. The mice were inoculated
intranasally with 5ร10**4 live N. fowleri, trophozoites in 10ฮผl physiological
saline under secobarbital anesthesia. After infection, they were inspected daily
until sacrifice. After sequential immunization and just before infection in cases
of offsprings, the serum IgG response in mice against N. fowleri was examined by
enzyme linked immunosorbent assay(ELISA). For the study, Naegleria trophozoites
were disrupted by sonicator and sedimented at 8,000รg for 1 hour. The supernatant
was used as Naegleria antigen for ELISA after dialysis.
The optical density of the serum IgG level were significantly increased from
0.21ยฑ0.11 before immunization to 0.45ยฑ0.29 and 1.02ยฑ0.28 after 1st and 2nd
immunization, respectively. The mortality rate (53.6%) in experimental progeny was
also significantly decreased as compared with controls(93.6%) when dams were
immunized on the 2nd and 3rd week gestation. Mean survival time did not prolong in
experimental groups as compared with control group. In addition. serum IgG levels
of the offsprings mated with immunized dams(natural or foster) were higher than
those of the control group.
Based on these results, it is considered that maternal immunity against N.
fowleri is transferred to the offsprings through the placenta and/or milk.restrictio