分子神经科学

The core task of this step is to select a molecular neuroscience research question and design a rigorous experimental plan.

• Select research topic: choose from molecular neuroscience directions—molecular mechanism of synaptic transmission, molecular basis of synaptic plasticity, ion channel structure and function, neurotransmitter receptor regulation, signal transduction pathways, molecular mechanisms of neural development, molecular mechanisms of neurodegenerative diseases, molecular targets of neuropsychiatric disorders
• Molecular tool preparation: design molecular biology experimental tools—primer design (PCR primers, qPCR primers, sgRNA design), vector construction (overexpression vectors, shRNA/siRNA, CRISPR/Cas9 vectors, fluorescent fusion proteins, reporter gene vectors), antibody preparation/selection, probe design
• Experimental design: determine experimental system (in vitro cultured cell lines, primary neuron culture, brain slice culture, in vivo animals); design experimental groups (control, overexpression, knockdown/knockout, rescue experiment); determine detection indicators (mRNA, protein, cell morphology, electrophysiology, animal behavior); develop experimental workflow

The core task of this step is to analyze expression patterns of neural-related genes and perform gene functional manipulation experiments.

• Gene expression analysis: detect expression patterns of target genes—mRNA level (RT-PCR, qPCR, in situ hybridization, RNAscope, single-cell sequencing), protein level (Western blot, immunofluorescence, immunohistochemistry, immunoelectron microscopy), spatiotemporal specificity of expression (different brain regions, developmental stages, cell types)
• Gene functional manipulation: perform gain- and loss-of-function experiments—overexpression (plasmid transfection, viral-mediated: AAV, lentivirus, retrovirus), gene knockdown (siRNA, shRNA, ASO), gene knockout/knock-in (CRISPR/Cas9, Cre-loxP conditional knockout), point mutation (phosphorylation sites, binding site mutations)
• Manipulation efficiency validation: verify efficiency and specificity of gene manipulation—qPCR for mRNA expression changes, Western blot for protein expression changes, immunofluorescence/flow cytometry for transfection efficiency, sequencing for gene editing accuracy; set appropriate controls to rule out off-target effects

The core task of this step is to study neural protein interactions and signal transduction pathways, and understand regulatory mechanisms of molecular networks.

• Protein interaction study: detect protein-protein interactions—yeast two-hybrid (Y2H) screening for interacting proteins, co-immunoprecipitation (Co-IP) for in vivo interaction validation, GST pull-down for in vitro direct interaction, FRET for live-cell interaction detection, proximity ligation assay (PLA) for endogenous interaction detection
• Signaling pathway analysis: analyze neural signal transduction pathways—MAPK pathway, PI3K-Akt pathway, Ca2+-CaMKII-CREB pathway, NF-κB pathway, Wnt pathway, Notch pathway, etc.; detect pathway activity (phospho-protein detection, reporter gene assay, transcription factor activity assay); perform upstream/downstream pathway validation (gene manipulation + pathway activity detection)
• Post-translational modification analysis: study protein post-translational modifications—phosphorylation (Phos-tag electrophoresis, phospho-antibody detection, mass spectrometry identification of phosphorylation sites), ubiquitination, acetylation, methylation, glycosylation; analyze effects of modifications on protein function, localization, stability

The core task of this step is to validate molecular function at the neural cell level and study mechanisms at the cellular level.

• Neural cell culture: prepare primary neuron cultures (cortical, hippocampal, midbrain dopaminergic, etc.), neural stem cell culture and differentiation, neural cell lines (SH-SY5Y, PC12, N2a) culture; perform cell transfection/infection; establish stable cell lines
• Cell morphology and structure analysis: observe neuronal morphological changes—cell survival/apoptosis (TUNEL, flow cytometry Annexin V), neuronal polarization establishment, dendritic branching (Sholl analysis), dendritic spine morphology (density, type, size), synapse formation (pre/post synaptic marker co-localization); use confocal microscopy imaging
• Cell function detection: detect neuronal functional properties—electrophysiological properties (patch-clamp recording of resting potential, input resistance, action potentials, synaptic currents mEPSC/mIPSC, LTP/LTD), calcium imaging (single/two-photon calcium imaging for neuronal activity), transmitter release (microdialysis, electrochemical detection), neuronal excitability

The core task of this step is to write a molecular neuroscience research report systematically presenting the complete evidence chain of molecular mechanism research.

• Write research paper: write following molecular neuroscience paper standards—abstract, introduction, materials and methods (experimental materials, molecular biology methods, cell biology methods, electrophysiology methods, statistical analysis), results (gene expression → protein interaction → signaling pathway → cellular function, presented in logical hierarchy), discussion (molecular model, relationship with literature, significance and limitations), conclusion, references
• Build molecular mechanism model: construct molecular mechanism model diagram based on experimental results—show upstream/downstream regulatory relationships of target molecule, involved signaling pathways, regulatory modes on cellular function; draw signaling pathway diagrams and molecular interaction networks
• Translational significance discussion: discuss translational significance of findings—molecular targets for neurological diseases (drug targets, gene therapy targets), biomarkers, intervention strategies; discuss clinical translation potential of basic research combined with clinical studies