Although it has been known that human seminal plasma (HSP) suppresses immune responses, there is little data concerning in vivo effects on humoral and cellular immune responses, particularly on immediate hypersensitivity. Thus, the present study was undertaken in an effort to investigate the in vivo effect of HSP on humoral and cellular immune responses, including active systemic anaphylaxis (ASA) in mice. The immune responses investigated were delayed-type hypersensitivity (DTH) reaction to sheep red blood cell (SRBC) or human sperm antigen, hemagglutinin response, and active systemic anaphylaxis induced by egg albumin (OVA). Effect of HSP on Candida albicans infection was also studied. It was found that intraperitoneal administration of HSP before or after immunization with SRBC significantly suppressed the DTH to SRBC. HSP given after immunization with SRBC failed to suppress hemagglutinin response whereas HSP given before immunization with SRBC significantly suppressed the hemagglutinin response. Interestingly, intravaginal administration of HSP together with human sperm significantly suppressed DTH to human sperm as measured by footpad swelling reactions. HSP inhibited phagocytic function of macrophage and enhanced germ tube producing phagocytosed yeasts. Colony forming unit (CFU) of Candida albicans in kidneys of HSP-treated mice were enumerated. HSP given to mice before infection significantly increased the number of CFU in kidneys, strongly suggesting that HSP may decrease the resistance of mice to Candida infection. For the ASA experiment, mice were sensitized by i.p. injection of 500 ug OVA, 1.0 mg alum and 2x1000000000 Bordetella pertussis in 0.5 ml PBS and were challenged by i.v. inje-ction of 0.25 ml PBS containing 500 big OVA 18 days after sensitization. Surpris-ingly,HSP injection before ASA induction inhibited intensity of ASA and improved survival of anaphylaxis. Taken together, this study strongly suggests that HSP may suppress in vivo immediate and delayed immune responses and that HSP may decrease the resistance against Candida albicans infection, and this study may be the first to show the immunosuppressive effect of HSP on the induction of active systemic anaphylaxis.
Administration, Intravaginal ; Anaphylaxis ; Animals ; Bordetella pertussis ; Candida ; Candida albicans ; Erythrocytes ; Hemagglutinins ; Humans* ; Hypersensitivity ; Hypersensitivity, Immediate ; Immunity, Cellular* ; Immunization ; Kidney ; Macrophages ; Mice* ; Ovum ; Semen* ; Sheep ; Spermatozoa ; Stem Cells ; Yeasts

Neuregulin-1 (NRG1) signaling participates in the synaptic plasticity, maintenance or regulation of adult brain. Although ErbB4, a key NRG1 receptor, is expressed in multiple regions in the adult animal brain, little is known about its localization in Alzheimer's disease (AD) brains. We previously reported that ErbB4 immunoreactivity showed regional difference in the hippocampus of age-matched control. In the present paper, immunohistochemical characterization of the distribution of ErbB4 receptor in the hippocampus relative to pathology staging were performed in age-matched control (Braak stage 0, n=6) and AD (Braak stage I/V, n=10). Here, we found that ErbB4 immunoreactivity was significantly increased in apoptotic hippocampal pyramidal neurons in the brains of AD patients, compared to those of age-matched control subjects. In AD brains, ErbB4 immunoreactivity was demonstrated to colocalize with the apoptotic signal Bax in apoptotic hippocampal pyramidal neurons. These results suggest that up-regulation of ErbB4 immunoreactivity in apoptotic neuron may involve in the progression of pathology of AD.
Adult ; Alzheimer Disease ; Animals ; Apoptosis ; Brain ; Hippocampus ; Humans ; Neuregulin-1 ; Neurons ; Plastics ; Up-Regulation

Neuregulin-1 (NRG1) plays important roles in the development and plasticity of the brain, and has also been reported to exhibit potent neuroprotective properties. Although ErbB4, a key NRG1 receptor, is expressed in multiple regions in the adult animal brain, little is known about its role in Alzheimer's disease (AD). AD is characterized by progressive impairment of cognition and behavioral disturbance that strongly correlate with degeneration and death of neurons in the cerebral cortex and limbic brain areas, such as the hippocampus and the amygdala. Here, we show that the ErbB4 and phospho-ErbB4 immunoreactivities were higher intensity in the neurons of the CA1-2 transitional field of AD brains as compared to age-matched controls. Also, ErbB4 expression was increased in the neurons of the cortico medial nucleus amygdala, human basal forebrain and superior frontal gyrus of AD brains. In cerebral cortex and hippocampus of amyloid precursor protein/presenilin 1 double transgenic mice, ErbB4 immunoreactivity significantly increased in comparison to age-matched wild type control. These results suggest that up-regulating of ErbB4 immunoreactivity may involve in the progression of pathology of AD.
Adult ; Alzheimer Disease ; Amygdala ; Amyloid ; Animals ; Brain ; Cerebral Cortex ; Cognition ; Hippocampus ; Humans ; Mice ; Mice, Transgenic ; Neuregulin-1 ; Neurons ; Plastics ; Prosencephalon

The complications and sequelae after the mandibular surgery are related to inferior alveolar neurovascular bundles, which pass through the mandibular canal. The knowledge of their positions would decrease the risk of mandibular surgery dramatically and would be used for the development of the new surgical techniques. This study was undertaken to clarify the anatomical position of mandibular canal for the mandibular surgery. Forty four mandibules (23 males and 21 females average 66.5 years) obtained from the collection of Hanyang medical college were studied. The location of mandibular canal in the sections between premolars and molars were measured. The obtained results were as follows; At first, the mandibular canal lay lingual to the distal part of the body of the mandible. It then ran anteriorly and to the buccal part of the mandible between the first and the second premolars. In the sections between premolars and molars, the distance between the mandibular canal and the lower border of mandibular body was 8.9+/-1.9 mm at the position of the first molar, the distance between the deepest point of the alveolar socket and the mandibular canal was 9.5+/-3.5 mm at the second molar, which was the narrowest point. The results of this study would be useful to decrease the risk of the mandibular surgery and to develop the new techniques for mandibul surgery in the field of the dentistry and maxillofacial surgery.
Bicuspid ; Dentistry ; Female ; Humans ; Male ; Mandible* ; Molar ; Surgery, Oral

During the routine gross anatomical dissection, bilateral absence of the musculocutaneous nerve and unilateral brachioradial artery were found in a 76-year-old Korean male cadaver. At the apex of the axilla, the lateral cord of the brachial plexus united into the median nerve without branching off the musculocutaneous nerve. The flexor arm musculatures, normally innervated by the musculocutaneous nerve, were innervated by two separate branches from the median nerve. The distal one continued as the lateral antebrachial cutaneous nerve. In addition, the radial artery of the left arm was originated from the middle one-third of the brachial artery. At bifurcation, it lay deep to the median nerve and crossed it medially. However, at the elbow, it crossed again the median nerve anterolaterally. Just above the cubital fossa, it anastomosed with the brachial artery. The arterial distribution of the right arm was normal. The separate reports which described the absence of the musculocutaneous nerve or brachioradial artery have been reported. However, this combined variation has not been documented until now.
Aged ; Arm ; Arteries ; Axilla ; Brachial Artery ; Brachial Plexus ; Cadaver ; Elbow ; Humans ; Male ; Median Nerve ; Musculocutaneous Nerve ; Radial Artery

In order to present the optimal neuroscience tutorial material for medical students and researchers, this study is aimed to make neuro-digital slide and neuro-atlas based on the histological specimens of human spinal cord and brain stem. Cadavers which had agreed for organ donation for research purpose were used in this study. Brains and spinal cords were extracted within 24 hours after death, and then fixed with 10% neutral buffered formalin. Paraffin blocks were made with the following regions; 8 regions from the spinal cord (the levels of the upper cervical segment, the cervical enlargement, the upper thoracic segment, the mid thoracic segment, the lower thoracic segment, the upper lumbar segment, the lumbar enlargement, the sacral segment), 14 regions from the brain stem (the levels of the spinomedullary junction, the pyramidal decussation, the medial lemniscus decussation, the obex, the mid-olivary medulla, the upper medulla, the pontomedullary junction, the lower pons, the mid pons, the upper pons, the isthmus rhombencephali, the inferior colliculus, the superior colliculus, the posterior commissure). Using virtual microscope software, we made digital neuro-slides which can be used anywhere and anytime regardless of equipment of microscope. To help understanding anatomy and functions of nervous tissue, we also made neuro-atlas based on the digital slide images. As results, the outline and detailed structures of nuclei and tracts are easily discriminated and also matched with marks and nomenclatures of neuro-atlas. Moreover, the cytoarchitecture of each nucleus and histological features can be well distinguished. We hope that this product would be used as a useful neuroscience tutorial material for the medical and paramedical school students, clinical trainees like interns and residents, and also neuroscience researchers.
Brain ; Brain Stem ; Formaldehyde ; Humans ; Inferior Colliculi ; Neurosciences ; Paraffin ; Pons ; Pyramidal Tracts ; Spinal Cord ; Students, Medical ; Superior Colliculi ; Tissue and Organ Procurement

The aim of this study was to propose new more reliable peripheral nerve transection model to overcome the defect of the traditional sciatic axotomy model by specifically transecting L5 spinal nerve just after emerging from the intervertebral foramen and confining analysis area to the L5 spinal segment. The adult male Sprague-Dawley rats, weighing 300~350 g at the time of surgery, were used for the experiments. Four different experimental groups were used. 1. Sciatic nerve transection (Sc-Tx) group: transect the sciatic nerve in the popliteal fossa where it divided into the common peroneal nerve and tibial nerve. 2. L5 spinal nerve transection (L5-Tx) group: L5 spinal nerve was specifically transected. 3. Suture (Su) group: L5 spinal nerve was transected and immediately sutured. 4. Control group: the same surgical procedure with L5 spinal nerve transection group was performed except for the excision of L5 spinal nerve. To distinguish L5 motoneurons from the other level ones, the animals were received the retrograde tracer, FluoroGold into the axotomized proximal nerve stump. Serial coronal frozen sections at 40 microm thick through the L4 to L6 spinal segment was performed and the resultant total number of sections was about 180. Approximate serial 50 sections (approximately 2 mm) could be considered as the L5 segment based on the number of the fluorescent signals (above 20). L5 spinal segment could be differentiated from L4 and L6 segment based on their morphological characteristics under Cresyl violet stain. In L5-Tx group, at 2 and 4 weeks post-transection, the number of L5 spinal motoneurons was reduced by 8%. Meanwhile, Sc-Tx and Su groups showed no statistically notable changes. In this study, the authors could propose more reliable peripheral nerve axotomy model than the conventional sciatic nerve axotomy model by specifically transecting L5 spinal nerve and confining the investigating area within the L5 spinal segment.
Adult ; Animals ; Axotomy ; Benzoxazines ; Frozen Sections ; Humans ; Male ; Peripheral Nerve Injuries ; Peripheral Nerves ; Peroneal Nerve ; Rats ; Rats, Sprague-Dawley ; Sciatic Nerve ; Spinal Nerves ; Sutures ; Tibial Nerve ; Viola

The aim of this study was to propose new more reliable peripheral nerve transection model to overcome the defect of the traditional sciatic axotomy model by specifically transecting L5 spinal nerve just after emerging from the intervertebral foramen and confining analysis area to the L5 spinal segment. The adult male Sprague-Dawley rats, weighing 300~350 g at the time of surgery, were used for the experiments. Four different experimental groups were used. 1. Sciatic nerve transection (Sc-Tx) group: transect the sciatic nerve in the popliteal fossa where it divided into the common peroneal nerve and tibial nerve. 2. L5 spinal nerve transection (L5-Tx) group: L5 spinal nerve was specifically transected. 3. Suture (Su) group: L5 spinal nerve was transected and immediately sutured. 4. Control group: the same surgical procedure with L5 spinal nerve transection group was performed except for the excision of L5 spinal nerve. To distinguish L5 motoneurons from the other level ones, the animals were received the retrograde tracer, FluoroGold into the axotomized proximal nerve stump. Serial coronal frozen sections at 40 microm thick through the L4 to L6 spinal segment was performed and the resultant total number of sections was about 180. Approximate serial 50 sections (approximately 2 mm) could be considered as the L5 segment based on the number of the fluorescent signals (above 20). L5 spinal segment could be differentiated from L4 and L6 segment based on their morphological characteristics under Cresyl violet stain. In L5-Tx group, at 2 and 4 weeks post-transection, the number of L5 spinal motoneurons was reduced by 8%. Meanwhile, Sc-Tx and Su groups showed no statistically notable changes. In this study, the authors could propose more reliable peripheral nerve axotomy model than the conventional sciatic nerve axotomy model by specifically transecting L5 spinal nerve and confining the investigating area within the L5 spinal segment.
Adult ; Animals ; Axotomy ; Benzoxazines ; Frozen Sections ; Humans ; Male ; Peripheral Nerve Injuries ; Peripheral Nerves ; Peroneal Nerve ; Rats ; Rats, Sprague-Dawley ; Sciatic Nerve ; Spinal Nerves ; Sutures ; Tibial Nerve ; Viola

Neuregulin-1 (NRG1) signaling participates in numerous neurodevelopmental processes. Although ErbB4, a key NRG1 receptor, is expressed in multiple regions in the adult animal brain, little is known about its expression in aged human brain. We show that ErbB4 immunoreactivity was shown regional difference in the hippocampus of age-matched control and that the distribution of these molecules was altered in Alzheimer's disease (AD) brains. Immunohistochemical characterization of the distribution of ErbB4 receptor in the hippocampus relative to pathology staging were performed in age-matched control (Braak stage I/II, n=5), early AD (Braak stage III/IV, n=5) and advanced AD(Braak stage V/VI, n=10). The intensity of ErbB4 immunoreactivity was higher in neurons of the CA2 than that in CA1 or CA3 in the age-matched control. Particularly, in the early AD, ErbB4 immunoreactivity was significantly increased in the apoptotic cells of the CA2 field. In the advanced AD, ErbB4 immunostaining was more intense in the apoptotic cell of the CA2 field. In the dentate gyrus (DG), ErbB4-positive granular cell density was gradually increased in proportion to the progression of pathology of AD brains. We have also found that ErbB4 immunostaining was increased in the nucleus, suggesting that the presenilin-dependent cleavage of ErbB4 generates the soluble ErbB4 ICD (intracellular domain) that translocalized to the nucleus. Together, these results provide the immunohistochemical analysis of ErbB4 receptor in the human hippocampus staged by the progression of pathology of AD.
Adult ; Aged ; Alzheimer Disease ; Animals ; Apoptosis ; Brain ; Cell Count ; Dentate Gyrus ; Hippocampus ; Humans ; Neuregulin-1 ; Neurons

During inflammation of the colon, cells of the gut mucosa produce or express numerous inflammatory mediators, such as tumor necrosis factor-alpha (TNF-alpha), interleukin-1beta (IL-1 beta), and intercellular adhesion molecule 1 (ICAM-1). These mediators have been implicated as contributory factors to the inflammatory process, which results in colitis during inflammatory bowel disease (IBD). Rebamipide is an anti-gastric ulcer drug with anti-inflammatory properties in vivo and in vitro. The effects of Rebamipide on IBD have not been largely evaluated. Therefore, this study investigated the potential of Rebamipide to regulate the production of inflammatory mediators such as TNF-alpha, IL-1beta, and ICAM-1. Mice with trinitrobenzene sulfonic acid (TNBS)-induced colitis (IBD animal model), were treated intrarectally with 2 mM Rebamipide. Body weight, macro- and micro-histological scores, and activity were evaluated. As an index of tissue edema, the thickness of the colonic wall was measured between the serosal surface and the luminal surface of the mucosa. TNF-alpha, IL-1 beta, and ICAM-1 were detected by immunohistochemical staining. Rebamipide treatment of mice exhibiting TNBS-induced colitis dramatically improved the clinical and histopathological findings of inflammation. In addition, Rebamipide suppressed TNF-alpha, IL-1 beta, and ICAM-1 expression in TNBS-treated animals. Taken together, these findings suggest that Rebamipide is a potential therapeutic agent for treating patients with IBD.
Animals ; Body Weight ; Colitis ; Colon* ; Down-Regulation* ; Edema ; Humans ; Inflammation ; Inflammatory Bowel Diseases ; Intercellular Adhesion Molecule-1* ; Interleukin-1beta ; Mice ; Mucous Membrane ; Phenobarbital ; Tumor Necrosis Factor-alpha* ; Ulcer