Anti-Helicobacter pylori activity of crude N-acetylneuraminic acid isolated from glycomacropeptide of whey / 한국실험동물학회지

Helicobacter pylori colonizes the gastric mucosa of about half of the world's population, causing chronic gastritis and gastric cancer. An increasing emergence of antibiotic-resistant H. pylori arouses demand on alternative non-antibiotic-based therapies. In this study, we freshly prepared crude N-acetylneuraminic acid obtained from glycomacropeptide (G-NANA) of whey through a neuraminidase-mediated reaction and evaluated its antibacterial ability against H. pylori and H. felis. Overnight cultures of the H. pylori were diluted with fresh media and different concentrations (1-150 mg/mL) of crude G-NANA were added directly to the culture tube. Bacterial growth was evaluated by measuring the optical density of the culture medium and the number of viable bacteria was determined by a direct count of the colony forming units (CFU) on agar plates. For the in vivo study, mice were orally infected with 100 µL (5×108 cfu/mL) of H. felis four times at a day's interval, accompanied by a daily administration of crude G-NANA or vehicle. A day after the last infection, the mice were daily administered the crude G-NANA (0, 75, and 300 mg/mL) for 10 days and euthanized. Their stomachs were collected and bacterial colonization was determined by quantitative real-time PCR. Crude G-NANA inhibited H. pylori's growth and reduced the number of viable bacteria in a dose-dependent manner. Furthermore, crude G-NANA inhibited bacterial colonization in the mice. These results showed that crude G-NANA has antibacterial activity against Helicobacter and demonstrated its therapeutic potential for the prevention of chronic gastritis and gastric carcinogenesis induced by Helicobacter infection in humans.

A Case of Primary Tubal Choriocarcinoma / 대한산부인과학회잡지

Primary trbal choriocarcinoma is extremely rare. We have experienced a case of primary tubal choriocarcinoma and report with a brief review of its related literatures.

Clinical Review of the Hematopymetra of Uterus / 대한산부인과학회잡지

Background: Hematopyometra, an accumulation of bloody, purulent material in the ute-rine cavity, is a relatively uncommon event. The incidence is almost 0.01~0.5% in gynec-ologic patients. The most common cause of this condition is interference with the normal drainage of the uterus;endocervical obstruction by malignant disease. Other obstructive causes are the benign tumors in uterus, senile endocervicitis, long-term use of intrauterine device, cervical occlusion after surgery or radiation, intrauterinel infection, and congenital cervical anomaly. Methods: This report was performed to evaluate the hematopyometra patients, who were diagnosed and treated at Catholic University Medical College Hospitals from 1991 to 1995. Forty cases of hematopyometra were retrospectively reviewed by charts, radiologic and pathologic findings concerning with the clinical features. Results: 1) The most frequent age of hematopyometra patients was 50 to 59 years(45 %) and mean age was 63 years old. 2) Four patients(10 %) were at premenopausal period, and remaining 36 patients(90 %) were at the period of menopause(p<0.01). 3) The clinical manifestations of the patients were variable;profuse vaginal discharge(75 %), vaginal ble- eding or spotting(40 %), and lower abdominal pain(30 %). 4) The associating medical cond- itions or possible risk factors of hematopyometra are senile atrophic change(52.5 %), IUD inserted condition(25 %), genital malignant diseases(17.5 %), and uterine myoma(5 %). 5) The bacterial infection are frequently associated with hematopyometra and the causative ag ents are streptococci(50 %), E. coli(42 %), and mixed type(17 %). 6) Eight cases of them showed generalized peritonitis in the preoperative clinical course and three patients had been serious condition by septicemia. 7) The genital malignant diseases are associated with he- matopyomerta in 7 cases(17.5 %) of them(cervical cancer;4 cases, endometrial cancer;2 cases, and ovarian cancer;1 case). 8) All the cancer patients could be followed-up at le-ast for 2 years. Two patients, who were diagnosed for cervical cancer in the stage IIb and III, died of the persistent or recurrent disease in the period of following-up after the pri-mary treatment.

The effects of plaque control instruction in orthodontic patients / 대한치과교정학회지

The purpose of this study w-s to predict the respose to the chincap therapy from the initial cephalometric measurements and to obtain the indication of chincap therapy. 40 patients selected for this study were classified into two groups by the occlusal stability after completion of permanent dentition and the iiu4n ovement of facial profile, after chincap therapy. One was g response group which consisted of 25 children and the other was poor response group with 15 patients. Various measurements of the craniofacial structure in the initial lateral cephalogram were calculated and analyzed by t-test and discriminant analysis. The results were, as follows 1. Good response group had more horizontal growth pattern in initial stage of treatment, and the contributing measurements were Bjork sum, anterior-posterior facial height ratio, gonial angle, lower gonial angle and occlusal plane to AB plane angle. 2. The critical points and predictive values of the influential skeletal measurements were calculated. 3. The discriminant function was obtained from three. major influential measurements; Bjork sum, gonial angle and occliml plane to AB plane angle, and this function could discreminate correctly in 85% of this samples.

The effect of topical fluoride application on the number of salivary streptococcus mutans in orthodontic patients / 대한치과교정학회지

The effect of topical application on the number of S. mutans was tested in a group of 44 orthodontic patients (mean age, 12Y 3M). They were divided into 5 groups according to the method using NaF and SnF2. The number of S. mutans CFU were counted in stimulated saliva of each subject at baseline, and after one, two, three, and eight weeks. The following results were obtained. 1. In NaF rinsing group, and NaF topical application and NaF rinsing group, the number of S. mutans per ml saliva was not significantly changed. 2. In SnF2 topical application group, and SnF2 topical and NaF rinsing group, the number of S. mutans per ml saliva was significantly reduced. 3. After 8 weeks, there were no significant reduction of the number of S. mutans in comparison with baseline.

A cephalometric study on mesiodistal axial inclination of posterior teeth in open bite and deep bite / 대한치과교정학회지

For the purpose of investigating mesiodistal axial inclination of posterior teeth in normal occlusion group, open bite and deep bite group and investigating the correlationship between the axial inclination of posterior teeth and overbite of anterior teeth, a cephalometric study was performed on the subjects consisted of normal occlusion group(40), open bite group(71 : Angle's Class I 21, Class II, division 1 25, Class III 25) and deep bite group(64 : Angle's Class I 23, Class II, division 1 21, Class III 20). Mesiodistal axial inclination of posterior teeth to occlusal, mandibular and palatal plane were measured. The findings of this study were as follows: 1. Upper and lower posterior teeth were more mesially inclined to occlusal plane in open bite group than in deep bite group. 2. Lower posterior teeth were more mesially inclined in deep bite group than in open bite group in Angle's Class II, division 1 malocclusion but there were no significant differences in Angle's Class I and Class III malocclusion. 3. There was no significant correlationship between the axial inclination of posterior teeth to each plane and overbite of anterior teeth in open bite group. 4. There was a significant correlationship between the axial inclination of upper and lower second premolar to occlusal plane and overbite of anterior teeth in Angle's Class I, Class II, division 1 and Class III malocclusion.