5 results on '"P. K. Mai"'
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2. The Role of Clonal Evolution on Progression, Blood Parameters, and Response to Therapy in Multiple Myeloma
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Sarah Sandmann, Katharina Karsch, Peter Bartel, Rita Exeler, Tobias J. Brix, Elias K. Mai, Julian Varghese, Georg Lenz, and Cyrus Khandanpour
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multiple myeloma ,clonal evolution ,survival ,prognosis ,chromosomal alteration ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
IntroductionA variety of biomarkers are considered for diagnosis (e.g., β2-microgobulin, albumin, or LDH) and prognosis [e.g., cytogenetic aberrations detected by fluorescence in situ hybridization (FISH)] of multiple myeloma (MM). More recently, clonal evolution has been established as key. Little is known on the clinical implications of clonal evolution.MethodsWe performed in-depth analyses of 25 patients with newly diagnosed MM with respect to detailed clinical information analyzing blood samples collected at several time points during follow-up (median follow-up: 3.26 years since first diagnosis). We split our cohort into two subgroups: with and without new FISH clones developing in the course of disease.ResultsEach subgroup showed a characteristic chromosomal profile. Forty-three percent of patients had evidence of appearing new clones. The patients with new clones showed an increased number of translocations affecting chromosomes 14 (78% vs. 33%; p = 0.0805) and 11, and alterations in chromosome 4 (amplifications and translocations). New clones, on the contrary, were characterized by alterations affecting chromosome 17. Subsequent to the development of the new clone, 6 out of 9 patients experienced disease progression compared to 3 out of 12 for patients without new clones. Duration of the therapy applied for the longest time was significantly shorter within the group of patients developing new clones (median: 273 vs. 406.5 days; p = 0.0465).DiscussionWe demonstrated that the development of new clones, carrying large-scale alterations, was associated with inferior disease course and shorter response to therapy, possibly affecting progression-free survival and overall survival as well. Further studies evaluating larger cohorts are necessary for the validation of our results.
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- 2022
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3. Toward a Common Terminology for the Gyri and Sulci of the Human Cerebral Cortex
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Hans J. ten Donkelaar, Nathalie Tzourio-Mazoyer, and Jürgen K. Mai
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terminology ,gyri ,sulci ,cerebral cortex ,human brain ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 ,Human anatomy ,QM1-695 - Abstract
The gyri and sulci of the human brain were defined by pioneers such as Louis-Pierre Gratiolet and Alexander Ecker, and extensified by, among others, Dejerine (1895) and von Economo and Koskinas (1925). Extensive discussions of the cerebral sulci and their variations were presented by Ono et al. (1990), Duvernoy (1992), Tamraz and Comair (2000), and Rhoton (2007). An anatomical parcellation of the spatially normalized single high resolution T1 volume provided by the Montreal Neurological Institute (MNI; Collins, 1994; Collins et al., 1998) was used for the macroscopical labeling of functional studies (Tzourio-Mazoyer et al., 2002; Rolls et al., 2015). In the standard atlas of the human brain by Mai et al. (2016), the terminology from Mai and Paxinos (2012) is used. It contains an extensively analyzed individual brain hemisphere in the MNI-space. A recent revision of the terminology on the central nervous system in the Terminologia Anatomica (TA, 1998) was made by the Working Group Neuroanatomy of the Federative International Programme for Anatomical Terminology (FIPAT) of the International Federation of Associations of Anatomists (IFAA), and posted online as the Terminologia Neuroanatomica (TNA, 2017: http://FIPAT.library.dal.ca) as the official FIPAT terminology. This review deals with the various terminologies for the cerebral gyri and sulci, aiming for a common terminology.
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- 2018
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4. DBS in the baso-lateral amygdala improves symptoms of autism and related self-injurious behaviourA case report and hypothesis on the pathogenesis of the disorder
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Volker eSturm, Oliver eFricke, Christian P. Buehrle, Doris eLenartz, Mohammad eMaarouf, Harald eTreuer, Jürgen K. Mai, and Gerd eLehmkuhl
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Amygdala ,Deep Brain Stimulation ,autism ,case report ,hyperexcitability ,Self-injurious Behaviour ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
We treated a thirteen year old boy for life-threatening self-injurious behavior (SIB) and severe Kanner’s autism with Deep Brain Stimulation (DBS) in the amygdaloid complex as well as in the supra-amygdaloid projection system. Two DBS-electrodes were placed in both structures of each hemisphere. The stimulation contacts targeted the paralaminar, the basolateral, the central amygdala as well as the supra-amygdaloid projection system. DBS was applied to each of these structures, but only stimulation of the baso-lateral part proved effective in improving SIB and core symptoms of the autism spectrum in the emotional, social and even cognitive domains over a follow up of now 24 months. These results, which have been gained for the first time in a patient, support hypotheses, according to which the amygdala may be pivotal in the pathogeneses of autism and point to the special relevance of the baso-lateral part.
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- 2013
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5. Toward a Common Terminology for the Thalamus
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Jürgen K. Mai and Milan Majtanik
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thalamus ,parcellation ,nomenclature ,terminology ,MNI standard space ,concordance analysis ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 ,Human anatomy ,QM1-695 - Abstract
The wealth of competing parcellations with limited cross-correspondence between atlases of the human thalamus raises problems in a time when the usefulness of neuroanatomical methods is increasingly appreciated for modern computational analyses of the brain. An unequivocal nomenclature is, however, compulsory for the understanding of the organization of the thalamus. This situation cannot be improved by renewed discussion but with implementation of neuroinformatics tools. We adopted a new volumetric approach to characterize the significant subdivisions and determined the relationships between the parcellation schemes of nine most influential atlases of the human thalamus. The volumes of each atlas were 3d-reconstructed and spatially registered to the standard MNI/ICBM2009b reference volume of the Human Brain Atlas in the MNI (Montreal Neurological Institute) space (Mai and Majtanik, 2017). This normalization of the individual thalamus shapes allowed for the comparison of the nuclear regions delineated by the different authors. Quantitative cross-comparisons revealed the extent of predictability of territorial borders for 11 area clusters. In case of discordant parcellations we re-analyzed the underlying histological features and the original descriptions. The final scheme of the spatial organization provided the frame for the selected terms for the subdivisions of the human thalamus using on the (modified) terminology of the Federative International Programme for Anatomical Terminology (FIPAT). Waiving of exact individual definition of regional boundaries in favor of the statistical representation within the open MNI platform provides the common and objective (standardized) ground to achieve concordance between results from different sources (microscopy, imaging etc.).
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- 2019
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