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Parathyroid hormone and trabectedin have differing effects on macrophages and stress fracture repair. Bone 2024; 179:116983. [PMID: 38013019 DOI: 10.1016/j.bone.2023.116983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 10/25/2023] [Accepted: 11/23/2023] [Indexed: 11/29/2023]
Abstract
Stress fractures occur as a result of repeated mechanical stress on bone and are commonly found in the load-bearing lower extremities. Macrophages are key players in the immune system and play an important role in bone remodeling and fracture healing. However, the role of macrophages in stress fractures has not been adequately addressed. We hypothesize that macrophage infiltration into a stress fracture callus site promotes bone healing. To test this, a unilateral stress fracture induction model was employed in which the murine ulna of four-month-old, C57BL/6 J male mice was repeatedly loaded with a pre-determined force until the bone was displaced a distance below the threshold for complete fracture. Mice were treated daily with parathyroid hormone (PTH, 50 μg/kg/day) starting two days before injury and continued until 24 h before euthanasia either four or six days after injury, or treated with trabectedin (0.15 mg/kg) on the day of stress fracture and euthanized three or seven days after injury. These treatments were used due to their established effects on macrophages. While macrophages have been implicated in the anabolic effects of PTH, trabectedin, an FDA approved chemotherapeutic, compromises macrophage function and reduces bone mass. At three- and four-days post injury, callus macrophage numbers were analyzed histologically. There was a significant increase in macrophages with PTH treatment compared to vehicle in the callus site. By one week of healing, treatments differentially affected the bony callus as analyzed by microcomputed tomography. PTH enhanced callus bone volume. Conversely, callus bone volume was decreased with trabectedin treatment. Interestingly, concurrent treatment with PTH and trabectedin rescued the reduction observed in the callus with trabectedin treatment alone. This study reports on the key involvement of macrophages during stress fracture healing. Given these observed outcomes on macrophage physiology and bone healing, these findings may be important for patients actively receiving either of these FDA-approved therapeutics.
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Abstract
Data on pediatric antibiotic prescribing and utilization practices at urgent care centers (UCC) remain limited. In this study, an electronic medical record-based review of UCC encounters for respiratory tract infections (RTI) of patients belonging to one mid-sized pediatric practice was performed. Antibiotic prescribing and guideline adherence were compared between UCCs that were staffed exclusively by pediatric-trained providers to those staffed otherwise. Of a total of 457 RTI visits, 330 (72%) occurred at the pediatric UCC. Across all bacterial RTIs, 82% of encounters at the pediatric UCC were guideline-adherent versus 59% at nonpediatric UCCs (P < .001). At nonpediatric UCCs, pharyngitis was the most common RTI encounter diagnosis (40%), and full streptococcal management guideline adherence was 41%. While 93% of RTI-UCC encounters for <2 years were at pediatric UCCs, the majority of children >10 presented to nonpediatric UCCs. RTI guideline education to UCCs should be a focus of ambulatory stewardship efforts.
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Abstract
Background and Purpose—
Strokes have especially devastating implications if they occur early in life; however, only limited information exists on the characteristics of acute cerebrovascular disease in young adults. Although risk factors and manifestation of atherosclerosis are commonly associated with stroke in the elderly, recent data suggests different causes for stroke in the young. We initiated the prospective, multinational European study Stroke in Young Fabry Patients (sifap) to characterize a cohort of young stroke patients.
Methods—
Overall, 5023 patients aged 18 to 55 years with the diagnosis of ischemic stroke (3396), hemorrhagic stroke (271), transient ischemic attack (1071) were enrolled in 15 European countries and 47 centers between April 2007 and January 2010 undergoing a detailed, standardized, clinical, laboratory, and radiological protocol.
Results—
Median age in the overall cohort was 46 years. Definite Fabry disease was diagnosed in 0.5% (95% confidence interval, 0.4%–0.8%; n=27) of all patients; and probable Fabry disease in additional 18 patients. Males dominated the study population (2962/59%) whereas females outnumbered men (65.3%) among the youngest patients (18–24 years). About 80.5% of the patients had a first stroke. Silent infarcts on magnetic resonance imaging were seen in 20% of patients with a first-ever stroke, and in 11.4% of patients with transient ischemic attack and no history of a previous cerebrovascular event. The most common causes of ischemic stroke were large artery atherosclerosis (18.6%) and dissection (9.9%).
Conclusions—
Definite Fabry disease occurs in 0.5% and probable Fabry disease in further 0.4% of young stroke patients. Silent infarcts, white matter intensities, and classical risk factors were highly prevalent, emphasizing the need for new early preventive strategies.
Clinical Trial Registration Information—
URL:
http://www.clinicaltrials.gov
.Unique identifier: NCT00414583
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5
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Monitoring forest condition in Europe: concentrations of nitrogen and sulphur in bulk deposition and defoliation of main tree species. ACTA ACUST UNITED AC 2008. [DOI: 10.1080/00207230701862637] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Heavy metals in some French forest soils: Distribution, origin and controlling factors. ACTA ACUST UNITED AC 2003. [DOI: 10.1051/jp4:20030494] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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8
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Identification of chromosomal loci associated with non-P-glycoprotein-mediated multidrug resistance to topoisomerase II inhibitor in lung adenocarcinoma cell line by comparative genomic hybridization. Genes Chromosomes Cancer 2001; 30:136-42. [PMID: 11135430 DOI: 10.1002/1098-2264(2000)9999:9999<::aid-gcc1071>3.0.co;2-t] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
In order to identify genomic changes associated with an etoposide resistance acquisition, we used comparative genomic hybridization (CGH) to compare a human lung adenocarcinoma cell line, A549 wild type, and three sublines, A549-VP1-3, exposed to increasing concentrations of the topoisomerase II inhibitor, VP16. R-banding karyotype, fluorescence in situ hybridization (FISH), and Southern blot for the MLL gene were also performed. The CGH analysis showed that the A549-VP3 cell line shared chemoresistance-specific abnormalities (amplification of 11q23-qter, loss of chromosome 17, and deletions of 2p14-pter and 2q23-q24). FISH analysis confirmed the loss of one chromosome 17 in the three resistant sublines and revealed an increased fragmentation of chromosome 2 in more than two segments, depending on the etoposide concentration. FISH with an MLL gene probe showed additional signals of MLL (from three in the A549-WT to seven in the A549-VP3 cell line) translocated onto several other chromosomes. Southern blot indicated an amplification of the MLL gene, dependent on the etoposide concentration, without gene rearrangement. The CGH results are suggestive of loci that could be associated with the acquisition of an etoposide-chemoresistant phenotype. Deletion of the 2p region has already been reported, without any candidate gene being identified. The role of MLL in leukemogenesis has previously been demonstrated, but its role in the development of other tumors or its significance in the chemoresistance process remains to be elucidated.
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Spatial and temporal variability of foliar mineral concentration in beech (Fagus sylvatica) stands in northeastern France. TREE PHYSIOLOGY 2000; 20:13-22. [PMID: 12651522 DOI: 10.1093/treephys/20.1.13] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Foliar mineral concentration may provide a basis for monitoring the consequences of long-term environmental changes, such as eutrophication and acidification of soils, or increase in atmospheric CO(2) concentration. However, analytical drifts and inter-tree and year-to-year variations may confound environmental effects on long-term changes in foliar mineral concentration. We have characterized the relative effects of these potentially confounding factors on foliar carbon, nitrogen, phosphorus, calcium, potassium, magnesium and manganese concentrations in 118 pure beech (Fagus sylvatica L.) stands, sampled in 1969-71 and 1996-97. Interannual fluctuations of these elements were quantified in a subset of six beech stands monitored for 5 years. Intercalibration between the methods used at each sampling period for nitrogen and phosphorus analyses showed significant, but low, relative differences (0.8 and 3.3% for N and P, respectively). Based on inter-tree variability, elements could be arranged in four groups: C (constant), N and P (low variability), K and Ca (medium variability), Mn and Mg (high variability). Inter-tree coefficients of variation were 2, 6, 8, 15, 18, 22 and 27%, respectively. Year-to-year fluctuations increased in the order N, P, Mg, K, Ca, and Mn coefficients of variation of 4, 4, 7, 9, 11, 15 and 29%, respectively). Between the two sampling periods, foliar N concentration increased 12%, whereas decreases were observed for P (-23%), Mg (-38%) and Ca (-16%). Ratios of N/P, N/K and N/Mg increased by 42, 19 and 77%, respectively. These changes were larger than the interannual variations for P, Mg, N/P, N/Mg and Mg/Ca. Decreasing concentrations of P and cations were particularly marked for trees growing on acidic soils, whereas the positive N trend did not depend on soil type. Both increasing atmospheric CO(2) concentrations and acidification of forest soils could contribute to decreasing P and cation concentrations in foliage. The increase in foliar N concentration with time suggests a nitrogen deposition effect. Whatever the causes of these changes, the large shift in element ratios indicates an accelerating imbalance between nitrogen and cation status.
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Abstract
Survival signalling by ligand-activated tyrosine kinase receptors plays a crucial role in maintaining the balance between cell viability and apoptosis in multicellular organisms. To identify receptor domains and pathways involved in survival signalling, the nerve growth factor receptor TrkA was expressed in Rat-1/MycER fibroblasts. We demonstrate that wt-TrkA receptor delays c-Myc-, U.V.- and Cycloheximide-induced apoptosis and activates targets such as the mitogen-activated protein kinase (MAPK) Erk2 and the serine/threonine kinase Akt/PKB, both of which have been implicated in survival signalling. TrkA mutated within its SHC binding site (Y490F) delays c-Myc-induced apoptosis without activating endogenous Akt/PKB. In contrast, the TrkA Y490F mutant receptor does not delay U.V.-induced apoptosis whilst TrkA mutated at its PLC-gamma binding site (Y785F) is capable of protecting from apoptosis induced by c-Myc or U.V. treatment. The double mutant TrkA YY490/785FF fails to block either of these two apoptotic stimuli. While P13-kinase inhibitors LY294002 and Wortmannin completely block survival signalling following U.V. treatment, neither drug affects the ability of TrkA to block c-Myc-induced apoptosis. We show that the Akt/PKB pathway is essential for NGF stimulated TrkA survival signalling in the case of U.V.-induced apoptosis, but that apoptosis induced by c-Myc is also blocked by a novel, Akt/PKB-independent, pathway. These observations suggest that TrkA can activate different survival signalling pathways, which can interfere with specific apoptotic pathways.
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Abstract
To facilitate the creation of Bak knockout mice and the further analysis of this Bcl-2 family member, we have isolated and sequenced the complete mouse Bak cDNA. The cDNA is 2 kb long and shares an overall nucleotide identity to the human Bak cDNA of 62%. The mouse Bak protein is 208 amino acids long with a predicted molecular weight of 23 kDa. The mouse Bak mRNA could be detected in all mouse tissues examined. In addition we mapped the murine bak gene. It consists of six exons spanning about 10 kb on chromosome 17B. The 5' region of the murine bak gene is unmethylated on the dinucleotide CpG in the area around exon 1. Furthermore, it contains potential binding sites for transcription factors such as Sp1 and c-Myb.
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Mechanism of transformation by v-ErbA: substitution for steroid hormone receptor function in self renewal induction. Oncogene 1997; 15:701-15. [PMID: 9264411 DOI: 10.1038/sj.onc.1201208] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
V-ErbA, a mutated thyroid hormone receptor (TR) alpha cooperates with tyrosine kinase oncoproteins to induce fatal erythroleukemia in chicks. In vitro, v-ErbA employs a similar cooperation to induce sustained proliferation and arrest differentiation of committed erythroid progenitors. V-ErbA has been proposed to function as a dominant-negative c-ErbA/TR alpha, since it lacks an AF-2 transactivation domain and cannot be activated by hormone but retains the capacity to bind corepressors. However, v-ErbA fails to heterodimerize with the coreceptor RXR, exhibits an altered DNA binding specificity and fails to suppress the action of coexpressed TR alpha/c-ErbA in erythroblasts. In this paper, we identify a novel mechanism by which v-ErbA contributes to leukemogenesis. Recently, the glucocorticoid receptor (GR) was identified as a key regulator of proliferation and differentiation in normal erythroid progenitors. For this, the GR required to cooperate with endogenous receptor tyrosine kinases (c-Kit) and with the estrogen receptor (ER). Here, we demonstrate that v-ErbA can substitute for the ligand-activated GR and ER, inducing proliferation and arresting differentiation in the presence of specific GR and ER antagonists. Like the GR, v-ErbA required to cooperate with c-Kit for both proliferation induction and differentiation arrest, being devoid of biological activity in the absence of an active c-Kit. In self-renewing erythroblasts, v-ErbA not only repressed known v-ErbA target genes but also maintained high expression of c-myb. These biological activities of v-ErbA depended on distinct mutations in the DNA-binding domain. Additionally, v-ErbA acted as a partial, weak repressor of c-ErbA/TR alpha function in normal erythroblasts. It could be converted into a truly dominant-negative receptor by restoring its ability to heterodimerize with RXR.
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MESH Headings
- Animals
- Cell Differentiation/genetics
- Cell Division/genetics
- Cells, Cultured
- Chick Embryo
- Chickens
- Erythroblasts
- Fibroblasts
- Gene Expression Regulation, Neoplastic
- Genetic Vectors/genetics
- Kinetics
- Oncogene Proteins v-erbA/genetics
- Oncogene Proteins v-erbA/metabolism
- Oncogene Proteins v-erbA/physiology
- Phosphotyrosine/analysis
- Protein-Tyrosine Kinases/metabolism
- Proto-Oncogene Proteins/genetics
- Proto-Oncogene Proteins/metabolism
- Proto-Oncogene Proteins c-kit/metabolism
- Proto-Oncogene Proteins c-kit/physiology
- Proto-Oncogene Proteins c-myb
- Receptors, Estrogen/antagonists & inhibitors
- Receptors, Estrogen/metabolism
- Receptors, Estrogen/physiology
- Receptors, Glucocorticoid/antagonists & inhibitors
- Receptors, Glucocorticoid/metabolism
- Receptors, Glucocorticoid/physiology
- Receptors, Thyroid Hormone/genetics
- Receptors, Thyroid Hormone/metabolism
- Receptors, Thyroid Hormone/physiology
- Retroviridae/genetics
- Trans-Activators/genetics
- Trans-Activators/metabolism
- Transformation, Genetic
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Abstract
The viability of vertebrate cells depends on survival factors which activate signal transduction pathways that suppress apoptosis. Defects in anti-apoptotic signalling pathways are implicated in many pathologies including cancer, in which apoptosis induced by deregulated oncogenes must be forestalled for a tumour to become established. Phosphatidylinositol-3-kinase (PI(3)K) is involved in the intracellular signal transduction of many receptors and has been implicated in the transduction of survival signals in neuronal cells. We therefore examined the role of PI(3)K, its upstream effector Ras, and its putative downstream protein kinase effectors PKB/Akt and p70S6K (ref. 5) in the modulation of apoptosis induced in fibroblasts by the oncoprotein c-Myc. Here we show that Ras activation of PI(3)K suppresses c-Myc-induced apoptosis through the activation of PKB/Akt but not p70S6K. However, we also found that Ras is an effective promoter of apoptosis, through the Raf pathway. Thus Ras activates contradictory intracellular pathways that modulate cell viability. Induction of apoptosis by Ras may be an important factor in limiting the expansion of somatic cells that sustain oncogenic ras mutations.
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Structure and expression of the chicken retinoblastoma gene. CELL GROWTH & DIFFERENTIATION : THE MOLECULAR BIOLOGY JOURNAL OF THE AMERICAN ASSOCIATION FOR CANCER RESEARCH 1994; 5:221-30. [PMID: 8180136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The molecular cloning and initial characterization of the complementary DNA encoding the chicken homologue of the human retinoblastoma susceptibility gene product Rb are described. Chicken Rb (chRb) was found to be highly homologous to human, mouse, and Xenopus Rb in primary amino acid sequence, underlining its conserved function in cell cycle control in higher eukaryotes. The highest level of homology was found within the Rb "pocket domains" and at the Rb COOH terminus, whereas the extreme NH2 terminus of chRb is divergent. We also show that transcription of chRb initiates at multiple start sites within a DNA segment which represents a CpG island. ChRb is transcribed as a 4.7-kilobase (kb) mRNA species in a variety of normal chicken tissues and oncogene-transformed hematopoietic cells. However, in v-rel-transformed cell lines, a variant 3.1-kb Rb-specific mRNA was detected in addition to the 4.7-kb transcript. ChRb is expressed as a 104 kilodalton protein and is therefore slightly smaller than the mammalian Rb proteins.
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Immortalization of conditionally transformed chicken cells: loss of normal p53 expression is an early step that is independent of cell transformation. Genes Dev 1992; 6:876-87. [PMID: 1577279 DOI: 10.1101/gad.6.5.876] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Clones of mortal chicken fibroblasts and erythroblasts transformed by temperature-sensitive v-src and v-erb B oncoproteins have been developed into immortal cell lines that retain the conditional transformed phenotype. The expressions of two tumor suppressor genes, the retinoblastoma (Rb) gene and the p53 gene, were investigated during senescence, crisis, and cell line establishment. In temperature-sensitive (ts)-v-erb B erythroblasts and ts-v-src fibroblasts (as well as in v-myc macrophages), loss of p53 mRNA or expression of a mutated p53 gene invariably occurred in the early phase of immortalization. In contrast, expression of the Rb gene was unchanged at all stages of immortalization. Inactivation of the original temperature-sensitive oncogene led to loss of the transformed phenotype in fibroblasts and to differentiation in erythroblasts, even in lines that were immortal and lacked p53. The results demonstrate that the process of immortalization is distinct from cell transformation, probably requiring different mutational events.
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A multidrug-resistant ovarian carcinoma cell line with a malignant suppressed phenotype is a CD44 gene expression defective mutant. CANCER GENETICS AND CYTOGENETICS 1992; 60:14-9. [PMID: 1591701 DOI: 10.1016/0165-4608(92)90225-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A multidrug-resistant cell subline (OV1/VCR) derived from an ovarian adenocarcinoma cell line (OV1/P) was characterized by a typical suppressed malignant phenotype and by a unique karyotypic change: del(11)(p13). In an attempt to discern some genetic alteration of 11p genes that may be relevant to the phenotypic shift, cells were analyzed with DNA probes mapped in the deleted region and with monoclonal antibodies (MoAbs) against 11p-encoded membrane molecules. Southern blot did not detect abnormal restriction patterns of the probed sequences. OV1/VCR cells did not express the CD44 epitope (11p13 MIC4 locus) recognized by the F10-44 MoAb and did not accumulate RNAs of the CD44 (Hermes) core peptide. This defect was not detected in another OV1/P-derived drug-resistant subline that retained the malignant behavior and did not have the del(11p) marker. It may have contributed to phenotypic reversion because evidence shows that CD44 membrane molecule is involved in cell-cell interaction and growth regulation of cancer cells.
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[Development of special continued professional training for the special dental technician]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1989; 30:233-5. [PMID: 2640077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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19
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Comparative efficacy of ciprofloxacin, azlocillin, imipenem/cilastatin and tobramycin in a model of experimental septicemia due to Pseudomonas aeruginosa in neutropenic mice. Infection 1989; 17:311-5. [PMID: 2599653 DOI: 10.1007/bf01650716] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The in vivo activity of ciprofloxacin against Pseudomonas aeruginosa was studied in a septicemia model in neutropenic mice and compared to that of other antibiotics with established activity against P. aeruginosa. When given as a single agent, ciprofloxacin proved to be as effective as imipenem/cilastatin, whereas azlocillin and tobramycin were rather ineffective. After infection with higher challenge inocula, combinations of two (synergistic) antibiotics were more effective than single agent therapy in most instances. The combination of ciprofloxacin with azlocillin was at least as effective as that of imipenem/cilastatin with tobramycin. Selection of mutants with decreased sensitivity to ciprofloxacin occurred during therapy, however, post-therapy MICs of ciprofloxacin did not exceed a level of 1 mg/l and rises of MICs did not detrimentally influence treatment outcome. Taken together with the results of earlier studies, our data encourage the use of ciprofloxacin in gram-negative septicemia in neutropenic patients.
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[Continued professional training of teachers in dental mechanics schools]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1988; 29:170-4. [PMID: 3242326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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21
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[Further development of the functional continuing education of a managerial dental technician in a medical college of a specialty polyclinic for dentistry in Halle]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1987; 28:3-10. [PMID: 3473842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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22
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[Contribution of professional schools on the further professional education of students of universities and professional colleges]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1986; 27:97-8. [PMID: 3465126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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23
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[Further developments in medical school education]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1986; 27:10-2. [PMID: 3461635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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24
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[Teamwork from the technical laboratory viewpoint]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1985; 26:204-5. [PMID: 3913244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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25
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[Further development of postgraduate continuing education programs for dental technicians]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1985; 26:135-40. [PMID: 3868286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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26
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[Significance, aims, content and methodology in teamwork--technics]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1985; 26:7-10. [PMID: 3863415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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27
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[Communist education, especially ethical-moral education, in the practical and theoretical training of students in the profession of dental technology]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1984; 25:179-87. [PMID: 6594860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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28
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[Significance, position, destination, content and function of work teams in the continuing education system of dental technicians as well as in the methodical-didactical format of their work]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1983; 24:354-60. [PMID: 6583958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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29
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[Cooperation in dental work and service]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1983; 24:229-31. [PMID: 6583948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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30
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[Asbestos dust hazards in the modern asbestos processing industry]. ZENTRALBLATT FUR ARBEITSMEDIZIN, ARBEITSSCHUTZ, PROPHYLAXE UND ERGONOMIE 1982; 32:228-36. [PMID: 7136324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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31
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[Preliminary terms for the use of planning standards and for the creation of premium wages for dental technicians]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1982; 23:147-60 contd. [PMID: 6956182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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32
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[Ideas for a new development phase of medical professional school studies for dental technicians]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1982; 23:145-6. [PMID: 6956181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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33
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[Ideas and proposals on the training and continuing education of dental graduates]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1982; 23:1-3. [PMID: 6956168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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34
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[Continuing education for medical professional school graduates]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1981; 22:537-40. [PMID: 6956157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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35
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[Postgraduate qualification as "Head Dental Technician" as related to his duties]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1981; 22:97-104. [PMID: 6945783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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36
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[Structure, task and function of the Medical Technical School of the polyclinic for stomatology in Halle (Saale)]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1981; 22:49-53. [PMID: 6943888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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37
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[Management, planning, organization and methodical and didactic aspects of dental technician training under special curriculum of 1977]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1979; 20:208-9 contd. [PMID: 294051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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38
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[Management, planning, organization and methodical and didactic aspects of dental technician training according to special curriculum of 1977]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1979; 20:162-4. [PMID: 294747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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39
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[Management, planning, organization and methodical and didactic aspects of dental technical training using the new curriculum of 1977]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1979; 20:106-7. [PMID: 294036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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40
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[Development of structural and functional relations of orthodontics with other special fields of stomatology--unity and differentiation as a process]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1979; 20:55-60. [PMID: 294038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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41
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[Management, planning, organization and methodical and didactic aspects of dental technician training using the new curriculum of 1977]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1979; 20:34-6. [PMID: 294031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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42
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[Management, planning, organization and methodical, didactic aspects of dental technician training using the new curriculum of 1977]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1978; 19:515-7. [PMID: 294027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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43
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[Observations and thoughts on work and education process in dental technology]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1978; 19:384-5. [PMID: 284695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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44
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[Notes on the application of the improved "Guideline for the introduction of technical quality specifications and planning standards for dental laboratory work as a basis for incentive time wages"]. STOMATOLOGIE DER DDR 1978; 28:395-8. [PMID: 276960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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45
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[Orofacial system]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1978; 19:206-8 contd. [PMID: 284687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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46
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[Thoughts and proposals for collective development of "guidelines for the introduction of technical quality standards and the planning value for dental technical work as a basis for premium time compensation"]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1978; 19:96-7 contd. [PMID: 280112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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47
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[The total prosthesis]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1977; 18:523-4 contd. [PMID: 360699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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48
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[The total prosthesis]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1977; 18:489-91 contd. [PMID: 360695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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49
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[Total prosthesis]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1977; 18:460-2. [PMID: 356481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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50
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[Continuing education, planning and organizations education of dental technic in the year 1978]. ZAHNTECHNIK; ZEITSCHRIFT FUR THEORIE UND PRAXIS DER WISSENSCHAFTLICHEN ZAHNTECHNIK 1977; 18:429-31. [PMID: 278412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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