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Hire Dr. Jana H.

Germany

USD 50 /hr

Senior Neuroscientist & Cell Biologist | 30+ Years Research | High-Impact Publishing, Medical Writing & Scientific Consu

Profile Summary

I bring over 30 years of experience in biomedical basic research to the table. I studied biophysics and obtained a PhD in biology, demonstrating my ability for independent research and project leadership with a habilitation (professorial degree) in neuroscience. I have worked at leading German universities and Max Planck Institutes as well as at University College London (UCL), and I have published in high-impact journals such as Cell, Neuron, The EMBO Journal, Nature Neuroscience, and Nature Communications. The scientific questions I addressed focused on cell biological mechanisms that are ubiquitous in the mammalian organism: exocytosis, membrane potential (including action potential firing), synaptic signaling, ionotropic and metabotropic receptors, cellular Ca²⁺ signaling and homeostasis. These topics were always clinically relevant, particularly for neurological disorders such as ataxias and Alzheimer’s disease, but also for allergies, metabolic diseases, and cancer. For several of my projects, I collaborated directly with clinicians, for example at the Max Delbrück Center for Molecular Medicine and at UCL. I am familiar with a wide range of cutting-edge laboratory techniques and am an expert in confocal and two-photon calcium imaging as well as the patch-clamp technique. My publication list reflects both my scientific expertise and my excellent English writing skills. Today, I help my clients publish their own work. Thanks to my excellent research skills and my ability to quickly immerse myself in other disciplines, I can also handle topics beyond my immediate field of expertise. I provide advice on research strategies and planning. A 100% job success rate and Top Rated Plus status on other platforms reflect the satisfaction of my clients.

Subject Matter Expertise

• ☆ Cell Biology
• ☆ Cell Signaling Pathways
• ☆ Membrane Biology
• ☆ Neuroscience
• ☆ Electrophysiology
• ☆ Patch-Clamp Electrophysiology
• ☆ Neurophysiology
• ☆ Neuropharmacology
• ☆ Molecular Neuroscience
• ☆ Neurobiology
• ☆ Biophysics
• ☆ Microscopy
• ☆ Light Microscopy
• ☆ Fluorescence Microscopy
• ☆ Scanning Probe Microscopy
• ☆ Cell Culture
• ☆ Human Biology
• ☆ Neurology
• ☆ Clinical Neurophysiology
• ☆ Alzheimer's Disease
• ☆ Medical Sciences

Services

• Writing
• Research
• Consulting
• Data & AI

Writing Medical Writing, Technical Writing, Copywriting, General Proofreading & Editing, Translation

Research Fact Checking, Gap Analysis

Consulting Scientific and Technical Consulting

Data & AI Image Processing, Image Analysis, Data Visualization

Work Experience

Independent researcher and scientific writer, self-employed

Hartmann Online-Dienstleistungen

2022 - Present

Research fellow

University College, London

2019 - 2022

Senior researcher

Technical University of Munich

2005 - 2018

Researcher

Ludwig-Maximilians-Universität in Munich

2000 - 2004

Postdoc

Saarland University

1999 - 1999

Postdoc

Max Delbrück Center for Molecular Medicine

1995 - 1998

PhD student

Max Planck Institute for Medical Research

1992 - 1995

PhD student

Free University of Berlin

1990 - 1992

Education

Diploma

Humboldt Universität Berlin - Germany

January 2025 - January 2025

Habilitation (Professorial Degree)

Technical University of Munich

January 2001 - December 2009

Dr. rer. nat.

Ruprecht-Karls-Universität Heidelberg - Germany

September 1992 - July 1995

Certifications

• Habilitation

  Technical University of Munich

  December 2009 - Present

• PhD

  Heidelberg University

  November 1995 - Present

• Diploma in Biophysics

  Humboldt University Berlin

  June 1990 - Present

Publications

JOURNAL ARTICLE

Jana Hartmann, Samuel S. Harris, Robert Ellingford, Debanjan Dasgupta, Marten Kehring, Rikesh M. Rajani, David Graykowski, Noé Quittot, Dhanush Sivasankaran, Caitlin Commins, et al. (2025). Alzheimer’s disease patient-derived high-molecular-weight tau impairs bursting in hippocampal neurons . Cell.

Jana Hartmann, Hsing-Jung Chen-Engerer, Arthur Konnerth (2021). Where have all the Orais gone? Commentary on “Orai1 channels are essential for amplification of glutamate-evoked Ca2+ signals in dendritic spines to regulate working and associative memory” . Cell Calcium.

(2020). Seizure protein 6 controls glycosylation and trafficking of kainate receptor subunits GluK2 and GluK3 . The EMBO journal.

(2019). TRPC3 is a major contributor to functional heterogeneity of cerebellar Purkinje cells . eLife.

(2019). Two types of functionally distinct Ca²⁺ stores in hippocampal neurons . Nature communications.

(2019). Abolishing cAMP sensitivity in HCN2 pacemaker channels induces generalized seizures . JCI Insight.

(2017). Novel members of quinoline compound family enhance insulin secretion in RIN-5AH beta cells and in rat pancreatic islet microtissue . Scientific Reports.

(2017). Transient Receptor Potential Canonical 3 (TRPC3) Channels Are Required for Hypothalamic Glucose Detection and Energy Homeostasis . Diabetes.

(2015). TRPC3‐dependent synaptic transmission in central mammalian neurons . Journal of Molecular Medicine.

(2015). TRPC3‐dependent synaptic transmission in central mammalian neurons . Journal of Molecular Medicine.

(2014). An assay to image neuronal microtubule dynamics in mice . Nature Communications.

(2014). An assay to image neuronal microtubule dynamics in mice . Nature Communications.

(2014). STIM1 Controls Neuronal Ca2+ Signaling, mGluR1-Dependent Synaptic Transmission, and Cerebellar Motor Behavior . Neuron.

(2013). Early Onset of Ataxia in Moonwalker Mice Is Accompanied by Complete Ablation of Type II Unipolar Brush Cells and Purkinje Cell Dysfunction . Journal of Neuroscience.

(2012). NMDA Receptor-Dependent Synaptic Activation of TRPC Channels in Olfactory Bulb Granule Cells . Journal of Neuroscience.

(2012). P/Q-type and T-type calcium channels, but not type 3 transient receptor potential cation channels, are involved in inhibition of dendritic growth after chronic metabotropic glutamate receptor type 1 and protein kinase C activation in cerebellar Purkinje c . European Journal of Neuroscience.

(2011). mGluR1/TRPC3-mediated Synaptic Transmission and Calcium Signaling in Mammalian Central Neurons . Cold Spring Harbor Perspectives in Biology.

(2009). Mechanisms of metabotropic glutamate receptor-mediated synaptic signalling in cerebellar Purkinje cells . Acta Physiologica.

(2008). TRPC3 Channels Are Required for Synaptic Transmission and Motor Coordination . Neuron.

(2008). Homosynaptic Long-Term Synaptic Potentiation of the "Winner" Climbing Fiber Synapse in Developing Purkinje Cells . Journal of Neuroscience.

(2007). Requirement of TrkB for synapse elimination in developing cerebellar Purkinje cells . Brain Cell Biology.

(2005). Determinants of postsynaptic Ca2+ signaling in Purkinje neurons . Cell Calcium.

(2004). Distinct Roles of G q and G 11 for Purkinje Cell Signaling and Motor Behavior . Journal of Neuroscience.

(2003). Differential Regulation of Exocytotic Fusion and Granule-Granule Fusion in Eosinophils by Ca2+and GTP Analogs . Journal of Biological Chemistry.

(2003). Impairment of LTD and cerebellar learning by Purkinje cell–specific ablation of cGMP-dependent protein kinase I . The Journal of Cell Biology.

(2003). Impairment of LTD and cerebellar learning by Purkinje cell–specific ablation of cGMP-dependent protein kinase I . The Journal of Cell Biology.

(2003). Calbindin in Cerebellar Purkinje Cells Is a Critical Determinant of the Precision of Motor Coordination . The Journal of Neuroscience.

(1998). Relations between intracellular Ca2+stores and store-operated Ca2+entry in primary cultured human glioblastoma cells . The Journal of Physiology.

(1998). Glutamate receptor activation can trigger electrical activity in human glioma cells . European Journal of Neuroscience.

(1998). Functional GABA A receptors on human glioma cells . European Journal of Neuroscience.

(1995). Influence of conductance changes on patch clamp capacitance measurements using a lock-in amplifier and limitations of the phase tracking technique . Biophysical Journal.

(1995). A novel Ca2+ -dependent step in exocytosis subsequent to vesicle fusion . FEBS Letters.

(1995). Regulation of granule size in human and horse eosinophils by number of fusion events among unit granules . The Journal of Physiology.

(1995). Regulation of granule size in human and horse eosinophils by number of fusion events among unit granules . The Journal of Physiology.

(1994). Three Distinct Fusion Processes during Eosinophil Degranulation . Annals of the New York Academy of Sciences.

(1991). The influence of chlorpromazine on the potential-induced shape change of human erythrocyte . Bioscience Reports.

OTHER

Jana Hartmann, Caroline Fecher, Laura Trovò, Stephan A. Müller, Nicolas Snaidero, Jennifer Wettmarshausen, Sylvia Heink, Oskar Ortiz, Ingrid Wagner, Ralf Kühn, et al.(2018). Profound functional and molecular diversity of mitochondria revealed by cell type-specific profiling in vivo . Cold Spring Harbor Laboratory