[Clinical characteristics and gestational complications associated with acute hepatitis a in pregnancy].

BACKGROUND/AIMS: Acute hepatitis A was recently significant increased among women with gestational age in Korea. However, the clinical course and gestational complications have not been fully elucidated in pregnant patients with acute hepatitis A. We evaluated the clinical impact of acute HAV infection in pregnancy. METHODS: Twelve pregnant women out of 85 female patients with acute hepatitis A during 6 years were retrospectively reviewed. RESULTS: The median age of the pregnant group was 26.5 years old. The number of patient with acute hepatitis A were 5 cases in the 1st trimester, 3 cases in the 2nd and 4 cases in the 3rd. 4 cases had significant gestational complications. One case experienced the abortion in 1st trimester and one fetal distress was noted in 3rd trimester. The latter case was delivered of a low birth weight infant (2,390 g) caused by premature rupture of membrane in 36 weeks of gestational age. Other two cases experienced premature contraction and they had been required tocolytic treatment. But, all mothers featured full recovery from HAV infection. Except one aborted fetus and one premature birth, Newborn babies were not affected by maternal hepatitis A. CONCLUSIONS: Acute HAV infection during pregnancy may be associated with the risk of gestational complications. HAV serology and vaccination for women with gestation age should be considered at high prevalence area of acute hepatitis A.

KITENIN is associated with tumor progression in human gastric cancer.

BACKGROUND: KAI1 COOH-terminal interacting tetraspanin (KITENIN) promotes tumor cell migration, invasion and metastasis in colon, bladder, head and neck cancer. The aims of current study were to evaluate whether KITENIN affects tumor cell behavior in human gastric cancer cell line and to document the expression of KITENIN in a well-defined series of gastric tumors, including complete long-term follow-up, with special reference to patient prognosis. MATERIALS AND METHODS: To evaluate the impact of KITENIN knockdown on behavior of a human gastric cancer cell line, AGS, migration, invasion and proliferation assays using small-interfering RNA were performed. The expression of activator protein-1 (AP-1) target genes and AP-1 transcriptional activity were evaluated by reverse transcription-polymerase chain reaction (RT-PCR) and luciferase reporter assay. The expression of KITENIN and AP-1 target genes by RT-PCR and Western blotting or immunohistochemistry was also investigated in human gastric cancer tissues. RESULTS: The knockdown of KITENIN suppressed tumor cell migration, invasion and proliferation in AGS cells. The mRNA expression of matrix metalloproteinase-1 (MMP-1), MMP-3, cyclooxygenase-2 (COX-2), and CD44 was reduced by knockdown of KITENIN in AGS. AP-1 transcriptional activity was significantly decreased by knockdown of KITENIN in AGS cells. KITENIN expression was significantly increased in human cancer tissues at RNA and protein levels. Expression of MMP-1, MMP-3, COX-2 and CD44 were significantly increased in human gastric cancer tissues. Immunostaining of KITENIN was predominantly identified in the cytoplasm of cancer cells. Expression of KITENIN was significantly associated with tumor size, Lauren classification, depth of invasion, lymph node metastasis, tumor stage and poor survival. DISCUSSION: These results indicate that KITENIN plays an important role in human gastric cancer progression by AP-1 activation.