Fabricating human organs with tissue engineering and stem cells may be an alternative to current suboptimal therapies for treatment of malfunction or loss of human tissues or organs. From the tissue engineering's perspective, the patients are expected to be treated with new tissues or organs reconstructed with transplanted cells. The cells for tissue engineering could be somatic cells derived from the patients themselves, other individuals, or animals. Another valuable cell source would be stem cells. Embryonic stem cells retain the pluripotency to differentiate into every cell type of human organs, but ethical issues remain to be addressed. Adult stem cells may solve these ethical issues and immune rejection, but have limitation in differentiation into all ranges of tissue-specific cell types. Tissue engineering typically employs scaffolds fabricated from synthetic or natural biomaterials to engineer a new functional tissue from cells. The configuration of the biomaterials guides the structure of a regenerated tissue by defining a three-dimensional space. Appropriate combination of tissue engineering with stem cells shows a promise to fabricate human organs or tissues that can be utilized for patients in the near future.
Adult Stem Cells ; Animals ; Artificial Organs ; Biocompatible Materials ; Embryonic Stem Cells ; Ethics ; Humans ; Stem Cells* ; Tissue Engineering*

A number of tissues have been studied in the past with respect to their organ-specific antigens. In many instances it has been possible to produce autoantibodies against characteristic components. The testis, epididymis, and seminal plasma have been largely explored from this angle. Interest in the field of accessory glands began many years ago, when the first cross-reactions between extracts of prostate, seminal vesicles and seminal plasma were demonstrated. As a consequence, the possibility that some seminal plasma antigens might be present in the accessory glands before being secreted into the genital tract opened up a new approach to possible autoimmunologic damage of these glands and of seminal spermatozoa as well. The purpose of this study is made to observe the effect of homologous epididymal extracts on the spermatogenesis in mouse. Isoimmunization with extracts of mouse epididymis, administered with complete Freund`s adjuvant, has been performed in this study.The results were as follows: 1. The histological observations revealed that spermatogenesis was adversely affected by the immunization with homologous epididymal extract added with an equal amount of complete Freund's adjuvant for 6 weeks. It was observed that spermatogenesis was remarkably impaired in the experimental group whereas it was unaffected in the control group of male mouse. The results further indicated that the degeneration and exfoliation were found in the germinal cell of seminiferous tubules and in the epithelium of the epididymal ducts besides intercanalicular infiltration of m0nonuclear round cells. 2. The cross-reactions between extracts of epididymis and testicular tissues were demonstrated in mouse. 3. The immunological examination such as immune diffusion test and sperm agglutination test showed negative reaction on all of the experimental animals in this study. Therefore. the immunological change in this experiments seems to be caused by cell mediated immunity.
Animals ; Autoantibodies ; Diffusion ; Epididymis ; Epithelium ; Freund's Adjuvant ; Humans ; Immunity, Cellular ; Immunization ; Male ; Mice* ; Prostate ; Semen ; Seminal Vesicles ; Seminiferous Tubules ; Sperm Agglutination ; Spermatogenesis* ; Spermatozoa ; Testis

The histopathological observation was made on 48 cases of benign prostatic hypertrophy which had been admitted to the Department of Urology, Chung-Ang University Hospital from January, 1971 to December, 1981. The results were as follows: 1. Histopathologically the fibromyoadenomatous type was 22 cases (45.8%) and the fibroadenomatous type 17 cases (35.4%), the fibromuscular type 9 cases (16.7%), muscular type 1 case (2.1%). There was no special difference between each histopathological type in age distribution. 2. Mean size of removed prostatic tissue was 81.1cm3 in fibroadenomatous type, 71.8cm3 in fibromyoadenomatous type, 25.0cm3 in muscular type, 20.0cm3 in fibromuscular type. The type of which weight was more than 50 gm was fibromyoadenomatous type. 3. Additional lesion such as inflammation, infarction or cancer was notedin I6 cases (31.9%). Inflammatory Change were present in 4 cases of fibromyoadenomatous hyperplasia and in 3 cases of fibroadenomatous hyperplasia. Infarction was seen in 2 cases of fibromyoadenomatous hyperplasia and in 1 case of fibromuscular hyperplasia. Latent cancer was found in 2 cases of fibromyoadenomatous hyperplasia and in 2 cases of fibroadenomatous hyperplasia. Inflammatory changes and latent cancer were present only in adenomatous hyperplasia and infarction in fibromuscular hyperplasia.
Age Distribution ; Hyperplasia ; Infarction ; Inflammation ; Prostatic Hyperplasia* ; Urology

this study was first initiated to compare the effectiveness of the KOH mount versus actual culturing from 1928 skin scrapings obtained frorn December, 1975 to August, 1976 in Daegu area. Second, changes in both clicical patterns and fungal flora isilated among the causative organisms were observed and following results were obtained . The KOH mount reparte;d a higher number of positive cases, when compared with the culture method. Covered areas of the body reported higher KOH positive rates than exposed areas, while cultures from the finger and toe-nails r."ported unusually low positive rates. In 51. 3% of the cases, both culture and KOH rnount were pasitive. The positive coincidence rate was found to be highest with the lesions frorn the scalp, buttock and groin, and lowest with lesions from the hands and feet. The positive KOH scrapings when cultured, showed a 10. 3% negative rate while the negative KOH scrapings reported a 7. 3%. positive culture rate. The rate of culture contamination was highest in KOH negative cases and also highest among finger and toe-nail lesions. Weather was also thought to be a factor: the higher the temperature, the lower the frequency of contamination. The 1138 strains isolated in 1976 were compared to a similar study done between 1957---1959, the following result., were observed: Trubrum has markedly increased while T. ferrugineum has significantly decreased with M. gypseum reported for the first time in Korea. Although most of these species were fairly equally distributed thrcughout the urban and rural areas, M. canis and M. gypseum were lirnited to the urban areas. Compared to 1959 changes in the causative organisms rate of the following dermatophytosis were observed In T. pedis, T. corporis, T. manus and T. Unguiurn, T. rubrum was reported as the predorninant causative agent and t.he second most prominent causative agent was T. mentaprophytes. In. T. cruris, T, rubum. was also repoted as the predoniinant causative agent with E. floccosurn the second whiile in T. capitis, T. ferrugineum remained the predominant causative agent, The frequeny of dernatophytosis was reported as follows: Tinea nf the nands and feet reported the highest incidence, T. pedis alone accounted for 38. 8% of all dermatophytosis while T, cruris was second 21.0% Compared to the previously study T. capitis decreased significantly. The majority of cases were found to be in the ag group(20~39 years) 68.4%. T. capitis and T. cruris were reported predominatly in males while similar results were reported with T. pedis. T. rnanus and T. unguium in females. The monthly distribution of T. capitis, T. corporis and T, cruris remained fairly consiant while T. pedis and I manus greatly increased during the liottcr months KIay to August. Coexistence of dermatophytosis preferred females to males and T.cruris infected from T. pedis was also common in males. On second experiment we extended the length of application to 15 days and the number of sujects to 15 persons. There developed erytherna in 1 case after 13 days of application and the others never showed erythema after 15 days of application, whereas with 2% soap solution erythema developed in 2 cases in 24 hours, 9 cases by 48 hours and 13 cases by 72 hours of application. The other 2 cases never showed erythema after 15 days of application. With above result there is no need to calculata IT as Kligman already mentioned. It is apparent that topically applied Ginseng saponin is essentially non-irritant material to the skin.
Buttocks ; Daegu ; Erythema ; Female ; Fingers ; Foot ; Groin ; Hand ; Humans ; Incidence ; Korea ; Male ; Panax ; Saponins ; Scalp ; Skin ; Soaps ; Tinea* ; Weather

No abstract available.
Dialysis* ; Korea*

The series comprised 424 cutaneous reactions to drugs treated at the department of Dermatology, Medical college of Korea University, during the years 1969-1975. The whole series comprised 211 male(49. 8%) and 213 female(50. 2%) patients. Exanthernatous eruptions are the most frequent of all cutaneous manifestation of drug reactions. Antipyretic analgesics, antibiotics and antibacterial drugs were the three group inducing most drug reactions in the present study, following by herb drugs. Of the antipyretic anaIgesics, acetylsalicylic acid was the ones most of the involved, and sulfonamides were the most frequent cause of skin reactions induced by antibacterial drugs and penicillin and tetracycline were the frequent cause of skin reactions induced by antibiotics.
Analgesics ; Anti-Bacterial Agents ; Aspirin ; Dermatology ; Drug Eruptions* ; Humans ; Korea ; Penicillins ; Skin ; Sulfonamides ; Tetracycline

This authors reviewed the radiographs of 20,057 patients with spinl radiculomyelopathy from April 1983 August 1990. The incidence and distribtion of the ossification of the spinal ligaments were analized as following. 1) The overall incidence of spinal ligaments ossification was 3.6% among 20,057 patients. 2) The most frequently occurs at lumbar area(67.1%), and then cervical(27.5%) thoracic(0.4%) area as in orders. 3) The OPLL was most common type(2.19%) of these spinal ligaments ossification, and then OALL(0.7%), OLF(0.24%) as in orders. 4) OPLL (1) OPLL was most frequent at lumbar area(58.6%) and then cervical(37.0%), thoracic(0.4%) area as in orders. (2) The cervical OPLL was commonly found at C5 & C6 area and morphologically, the multiple segmented type was most common then continuous type, mixed type and single segmented type in orders. (3) The multiple segmented type was more frequently found at upper cervical area, but the continuous type was more frequent at lower cervical area. 5) OALL (1) OALL was most frequent at lumbar area(86.0%) but thoracic(1.4%) and cervecal area(5.3%) were relatively low in frequency. (2) Of the lumbar OALL, the L4/5 area was most frequent site(37.8%) but the L3/4(25.3%) and L5/S1 area(24.5%) also had relatively high occurance rate. 6) OLF (1) OLF was most frequent at lumbar area(92.7%), but the incidence of OLF was relativerly rare at cervical(2.1%) and thoracic area(5.2%). (2) Of the lumbar OLF, the L4/5 area was most common site(33.1), but L5/S1 area had also high occurance rate(27.2%).
Humans ; Incidence ; Ligaments*

No abstract available.
Humans ; Violence*

No abstract available.
Dialysis* ; Korea*

The purpose of this paper is to describe a new apparatus which utilizes the principle of Van Tieghems hanging drop culture method. After using various methods of culturing fungi authors have found van Tieghems method to yield the most satifsymg result. Until now, this method has been slightly more tedious due to durability, storage, and quantity of culture necessary for each species. The new apparatus consists of 20mm plexiglass tubing cut in 16mm lengths and attache to a 16cm x12cm x2mm plexiglass plate with paraffin or manicure. These tubes a.re ranged in rows approximately 6cm apart with at least 8mm between tubes. Plates of varying sizes can be made to accornodate specific experimente. The authors developed thse inexpensive unbreakable plexiglass plates to allow for aimultaneous growth of various fungi and therefore more accurate comparison. Since these plates can be stored and handled easily, most af the disadvantages of using van Tieghems hanging drop culture rnethod have been eliminated.
Fungi ; Paraffin ; Polymethyl Methacrylate*