OBJECTIVETo investigate the correlation between the expression of key proto-oncogenes playing major roles in tumorigenic process and abnormal sarring.

METHODSImmunohistochemical technique was performed to detect the expressions of c-myc, c-fos and ras p21 proteins on hypertrophic scars, keloids and normal skin. Image analysis was used to compare their quantitative difference of expression.

RESULTSC-myc and c-fos expressions on the nucleus of fibroblasts of hypertrophic and keloid scars were significantly higher than normal skin controls, and there was no difference between the two lesions. Ras p21 expression was not detected on the fibroblasts of hypertrophic and keloid scars.

CONCLUSION1. c-myc and c-fos oncogenes are activated on hypertrophic and keloid scars, which may contribute to proliferation and differentiation of fibroblasts, synthesis and degradation of collagen and regulation of cytokines and induce abnormal scarring, the mechanisms of their effects remain to be further studied. 2. Ras gene may not mutate or its mutations may not play a major role in the process of abnormal scarring. 3. Only part of proto-oncogenes moderately expressed on abnormal scars. The expression of multiple oncogenes does not coexist in abnormal scars may be the cause of their less chances to induce malignant transformation.

Cicatrix, Hypertrophic ; metabolism ; Humans ; Immunohistochemistry ; Proto-Oncogene Proteins c-fos ; analysis ; Proto-Oncogene Proteins c-myc ; analysis ; Proto-Oncogene Proteins p21(ras) ; analysis ; Proto-Oncogenes

UNLABELLED: AbstractObjective: To analyze the expression of FOSB in acute myeloid leukemia （AML） and its correlation with prognosis of the patient based on the large sample data. METHODS: The genome, transcriptome, gene chip and clinical information from multiple public databases were statistical analyzed. RESULTS: The expression of FOSB gene in AML patients was significantly higher than that in normal people. The prognostic analysis of the 163 patients showed that the patients with high FOSB expression showed longer OS and EFS than those with FOSB low expression. The patients were further divided into chemotherapy group and allogeneic hematopoietic stem cell transplantation (allo-HSCT) group according to the treatment method, and then each group was divided into two subgroups (FOSBhigh, FOSBlow) according to the median expression level of FOSB. In the allo-HSCT group, the patients with FOSB high expression was longer event-free survival (EFS: P=0.017) and overall survival (OS: P=0029). At the same time, allo-HSCT in patients with high FOSB expression could improve the prognosis of the patients (Chemotherapy vs Allo-HSCT, OS: P<0.001, EFS: P=0.007). Multivariate analysis showed that the high expression of FOSB was an independent favorable prognostic factor for EFS and OS (EFS: HR=0.501， P=0.019; OS: HR=0.461， P=0.009) of the patients. CONCLUSION The high expression of FOSB indicated a good prognosis for acute myeloid leukemia.
Hematopoietic Stem Cell Transplantation ; Humans ; Leukemia, Myeloid, Acute/drug therapy* ; Multivariate Analysis ; Prognosis ; Proto-Oncogene Proteins c-fos/genetics*

OBJECTIVETo study the potential relationship between the expressions of c-jun and c-fos oncogenes and the prognosis of medulloblastoma.

METHODSThe specimens from 70 cases of medulloblastoma of the posterior fossa and 10 cases of normal cerebellar tissues were collected to determine c-jun and c-fos expressions by immunohistochemical staining in formalin fixed paraffin-embedded sections.

RESULTS(1) It showed that c-fos and c-jun protein expression was negative in 10 normal cerebellar tissue, while positive c-fos, c-jun immunoreactivity was found in 70 medulloblastoma specimens. The positive rate of c-jun and c-fos was 80% and 77%, respectively. There was high expression of c-jun and c-fos protein in medulloblastoma tissues. (2) There were positive correlations and strong co-operativity between c-jun and c-fos expression (r = 0.493, P < 0.01). (3) Correlative analysis indicated that expression of c-jun, c-fos were significantly correlated with survival time (c-jun: r = -0.447, P < 0.01; c-fos: r = -0.590, P < 0.01). The higher the expression level of c-jun and c-fos protein was, the worse the prognosis was in medulloblastoma patients.

CONCLUSIONSHigh expression of c-jun and c-fos protein could be noted in medulloblastoma tissues. The two transcription factors show positive correlation and strong co-existence between c-jun and c-fos expressions. The expression levels of c-jun as well as c-fos are negatively correlated with the mortality rate and life expectancy of patients with medulloblastoma. In addition, the co-expression of c-jun and c-fos could serve as an indicator for judging the prognosis of medulloblastoma.

Adolescent ; Adult ; Child ; Child, Preschool ; Female ; Humans ; Immunohistochemistry ; Infant ; Male ; Medulloblastoma ; metabolism ; mortality ; pathology ; Proto-Oncogene Proteins c-fos ; analysis ; Proto-Oncogene Proteins c-jun ; analysis ; Survival Analysis ; Survival Rate

OBJECTIVETo observe effects of electroacupuncture (EA) of low frequency on heroin-seeking behavior and FosB protein expression in relative brain regions so as to explore the mechanism of EA.

METHODSRat model of relapsing into heroin was established with progressive fixed ratio program, and model rats were randomly divided into 3 groups: a "Sanyinjiao" needle-retention control group, a low frequency and weak EA group, and a low frequency and strong EA group. Heroin-seeking behavior was elicited by conditional clue and small dose of heroin; FosB protein expression was investigated with immunohistochemical technique.

RESULTSAfter treatment, the heroin-seeking behavior induced by conditional clue decreased in the needle-retention control group and the weak EA group, and the heroin-seeking behavior induced by small dose of heroin in the weak EA group significantly reduced as compared with the control group, and FosB protein expression in the nucleus accumbens septi, globus pallidus, basolateral amygdaloid nucleus significantly decreased in the weak EA group, and did not significantly change in the strong EA group; the activity induced by heroin increased as compared with those in the control group and the weak EA group.

CONCLUSIONEA of low frequency and low intensity can cure the heroin-seeking behavior, which is correlated with regulating nervous adaptation of nucleus accumbens septi, basolateral amygdaloid nucleus, etc..

Amygdala ; chemistry ; Animals ; Electroacupuncture ; methods ; Globus Pallidus ; chemistry ; Heroin Dependence ; therapy ; Immunohistochemistry ; Male ; Nucleus Accumbens ; chemistry ; Proto-Oncogene Proteins c-fos ; analysis ; Rats ; Rats, Sprague-Dawley

OBJECTIVETo study the ability of aqueous extract of Hericium erinaceus mushroom in the treatment of nerve injury following peroneal nerve crush in Sprague-Dawley rats.

METHODSAqueous extract of Hericium erinaceus was given by daily oral administration following peroneal nerve crush injury in Sprague-Dawley rats. The expression of protein kinase B (Akt) and mitogen-activated protein kinase (MAPK) signaling pathways; and c-Jun and c-Fos genes were studied in dorsal root ganglia (DRG) whereas the activity of protein synthesis was assessed in peroneal nerves by immunohistochemical method.

RESULTSPeripheral nerve injury leads to changes at the axonal site of injury and remotely located DRG containing cell bodies of sensory afferent neurons. Immunofluorescence studies showed that DRG neurons ipsilateral to the crush injury in rats of treated groups expressed higher immunoreactivities for Akt, MAPK, c-Jun and c-Fos as compared with negative control group (P <0.05). The intensity of nuclear ribonucleoprotein in the distal segments of crushed nerves of treated groups was significantly higher than in the negative control group (P <0.05).

CONCLUSIONH. erinaceus is capable of promoting peripheral nerve regeneration after injury. Potential signaling pathways include Akt, MAPK, c-Jun, and c-Fos, and protein synthesis have been shown to be involved in its action.

Agaricales ; chemistry ; Animals ; Axons ; pathology ; Female ; Ganglia, Spinal ; metabolism ; Glucans ; analysis ; MAP Kinase Signaling System ; Nerve Crush ; Nerve Regeneration ; physiology ; Peripheral Nerves ; enzymology ; physiology ; Peroneal Nerve ; physiology ; Protein Biosynthesis ; Proto-Oncogene Proteins c-akt ; metabolism ; Proto-Oncogene Proteins c-fos ; genetics ; metabolism ; Proto-Oncogene Proteins c-jun ; genetics ; metabolism ; Rats, Sprague-Dawley

OBJECTIVETo investigate whether the decrease in expression of interleukin-2 (IL-2) after trauma is associated with changes in DNA binding activity of nuclear factor of activated T cells (NFAT) and activator protein-1 (AP-1).

METHODSMice with closed impact injury with fracture in both hind limbs were adopted as the trauma model. Spleen lymphocytes were isolated from traumatized mice and stimulated with Con-A. Culture supernatants were assayed for IL-2 activity, and total RNA was extracted from spleen lymphocytes and assayed for IL-2 mRNA. DNA binding activity of NFAT and AP-1 were measured by electrophoretic mobility shift assay (EMSA). The expression of c-Fos, c-Jun and JunB proteins was determined by the Western blot analysis.

RESULTSDNA binding activity of NFAT and AP-1 gradually decreased to a minimum of 41% and 49%, respectively, of the control on the 4th day after injury, which was closely followed by the decline in IL-2 activity and IL-2 mRNA. A decrease in the expression of c-Fos on the 1st and 4th day after trauma had no significant effect on c-Jun expression; the increase in expression of JunB was only on the 1st day after injury.

CONCLUSIONDecreased IL-2 expression is, at least in part, due to a decline in the activation of NFAT and AP-1 in traumatized mice. The decline in DNA binding activity of NFAT and AP-1 is partly due to a trauma-induced block in the expression of c-Fos.

Animals ; Cell Nucleus ; chemistry ; DNA ; metabolism ; DNA-Binding Proteins ; metabolism ; Electrophoretic Mobility Shift Assay ; Female ; Interleukin-2 ; analysis ; genetics ; Male ; Mice ; NFATC Transcription Factors ; Nuclear Proteins ; Proto-Oncogene Proteins c-fos ; analysis ; Proto-Oncogene Proteins c-jun ; analysis ; RNA, Messenger ; analysis ; Transcription Factor AP-1 ; metabolism ; Transcription Factors ; metabolism

Animal models for human chronic pain syndromes have been developed and widely used for pain research. One of these neuropathic pain models by Kim and Chung (1992) has many advantages for operation and pain elicitation. In this neuropathic model we have examined the c-fos protein, substance P, CGRP immunoreactivity in dorsal root ganglia and dorsal horn. 50 Sprague-Dawley rats were used for this study. L5 and L6 spinal nerves were ligated tightly to produce the neuropathic pain model. After 2, 4, 8, 16, and 24 hours and 1 week of surgery, rats were anesthetized and sacrificed by perfusion. After confirmation of the roots transected by the surgery, the L5 and L6 dorsal root ganglions and spinal cord were removed and processed for immunohistochemistry. All tissue sections were immunohistochemically stained for substance P, CGRP and c-fos using the peroxidase-antiperoxidase (PAP) method. The number of immunostained substance P and CGRP dorsal root ganglion cells and c-fos immunoreactive dorsal horn cells were counted and analyzed statistically with Mann-Whitney U test. The results are as follows. The number of c-fos protein immunoreactive neurons in the superficial layer of dorsal horn were increased markedly 2 hours after operation, and gradually decreased to normal level 1 week after operation. The number of c-fos protein immunoreactive neurons in the deep layer of the dorsal horn gradually increased to a peak 24 hours after operation, then decreased to the normal level 1 week after operation. The number of substance P and CGRP immunoreactive L5 and L6 dorsal root ganglion neurons were decreased markedly 1 week after the pain model operation. In conclusion, after neuropathic pain model operation, c-fos proteins were immediately expressed in the superficial layer of spinal dorsal horn, thereafter c-fos proteins in the deep layer of spinal dorsal horn were expressed. CGRP and substance P immunoreactive neurons in DRG were decreased markedly 1 week after neuropathic pain model operation. These decrements do not coincide with the other chronic pain models, which show great increases in these pain transmitting substances. Therefore, the relationship between pain and c-fos, SP and CGRP should be investigated further.
Animal ; Calcitonin Gene-Related Peptide/analysis* ; Ganglia, Spinal/chemistry* ; Immunohistochemistry ; Neurotransmitters/analysis* ; Pain/metabolism* ; Peripheral Nervous System Diseases/metabolism* ; Proto-Oncogene Proteins c-fos/analysis* ; Rats ; Rats, Sprague-Dawley ; Spinal Cord/chemistry* ; Substance P/analysis*

OBJECTIVETo investigate the effect of cytoskeleton integrity on the expression of c-fos gene in osteoblasts induced by fluid shear stress.

METHODSBALB/c mouse primary osteoblasts were divided into four groups (according to fluid shear stress loaded or not and cytochalasin D used or not). The Tagman probe real-time PCR and immunofluorescence were performed to detect the expression levels of c-fos mRNA, c-fos protein and cytoskeleton, respectively. The data were analysed using two-way ANOVA.

RESULTSIn control group and cytochalasin D group, fluid shear stress could significantly increase the expression levels of c-fos mRNA (0.1637 +/- 0.0303 and 0.0104 +/- 0.0070, respectively) and protein (177.14 +/- 9.37 and 150.95 +/- 6.17, respectively) in osteoblasts, compared with the unloaded osteoblasts of the control group and the cytochalasin D group (0.0057 +/- 0.0021 and 0.0032 +/- 0.0014, respectively for c-fos mRNA, and 117.96 +/- 4.11 and 119.77 +/- 5.19, respectively for protein, P < 0.05). Induced by the fluid shear stress, the expression levels of c-fos mRNA and protein in cytochalasin D group were lower than control group, and the difference had statistical significance (P < 0.05).

CONCLUSIONSThe cytoskeleton integrity in osteoblasts was essential to the expression of c-fos gene induced by fluid shear stress.

Analysis of Variance ; Animals ; Cells, Cultured ; Cytochalasin D ; pharmacology ; Cytoskeleton ; physiology ; Mice ; Mice, Inbred BALB C ; Osteoblasts ; drug effects ; metabolism ; Proto-Oncogene Proteins c-fos ; metabolism ; RNA, Messenger ; metabolism ; Rheology ; Stress, Mechanical

OBJECTIVETo explore the potential reporter gene assay for the detection of sodium channel-specific toxins in shellfish as an alternative for screening harmful algal bloom (HAB) toxins, considering the fact that the existing methods including HPLC and bioassay are inappropriate for identifying HAB toxins which poses a serious problem on human health and shellfish industry.

METHODSA reporter plasmid pEGFP-c-fos containing c-fos promoter and EGFP was constructed and transfected into T24 cells using LipofectAMINE 2000. Positive transfectants were screened by G418 to produce a pEGFP-c-fos-T24 cell line. After addition of increasing neurotoxic shellfish poison (NSP) or GTX2,3, primary components of paralytic shellfish poison (PSP), changes in expression of EGFP in the cell line were observed under a laser scanning confocal microscope and quantified with Image-pro Plus software.

RESULTSDose-dependent changes in the intensity of green fluorescence were observed for NSP in a range from 0 to 10 ng/mL and for GTX2,3 from 0 to 16 ng/mL.

CONCLUSIONpEGFP-c-fos-T24 can be applied in detecting HAB toxins, and cell-based assay can be used as an alternative for screening sodium channel-specific HAB toxins.

Animals ; Biological Assay ; Cell Line, Tumor ; Genes, Reporter ; physiology ; Green Fluorescent Proteins ; Harmful Algal Bloom ; physiology ; Humans ; Plasmids ; Proto-Oncogene Proteins c-fos ; genetics ; metabolism ; Shellfish ; analysis ; Sodium Channels ; Toxins, Biological ; chemistry ; toxicity

Animals ; Animals, Newborn ; Cyclic AMP Response Element-Binding Protein ; analysis ; Hippocampus ; blood supply ; chemistry ; pathology ; Hypoxia-Ischemia, Brain ; physiopathology ; Immunohistochemistry ; Proto-Oncogene Proteins c-fos ; analysis ; Rats ; Rats, Sprague-Dawley ; Reperfusion Injury ; physiopathology ; Time Factors