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Related Concept Videos

Gastritis II: Pathophysiology01:26

Gastritis II: Pathophysiology

The pathophysiology of gastritis begins with the colonization of the stomach lining by Helicobacter pylori (H. pylori). This bacterium spreads mainly via the oral-oral route through saliva or shared utensils, and can also be transmitted in overcrowded or unhygienic environments through contaminated water, despite its brief survival outside the body.ColonizationOnce ingested, H. pylori enters the stomach and begins colonization by navigating through the mucus layer lining the stomach wall. It...
Renewal of Intestinal Stem Cells01:23

Renewal of Intestinal Stem Cells

The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the goblet,...
Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
Cellular Adaptation IV: Dysplasia and Metaplasia01:24

Cellular Adaptation IV: Dysplasia and Metaplasia

DysplasiaDysplasia refers to abnormal changes in the size, shape, and organization of mature cells, characterized by pleomorphism, nuclear abnormalities, and increased mitotic activity. It commonly affects epithelial tissues, including the cervix, gastrointestinal tract, respiratory mucosa, and endometrium. Although it may occur alongside hyperplasia, dysplasia is not a true adaptive response but a preneoplastic change with potential to progress to cancer.When confined above the basement...
Role Of Notch Signalling In Intestinal Stem Cell Renewal01:12

Role Of Notch Signalling In Intestinal Stem Cell Renewal

Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...

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Related Experiment Video

Updated: May 13, 2026

Genome-Wide Analysis of DNA Methylation in Gastrointestinal Cancer
07:50

Genome-Wide Analysis of DNA Methylation in Gastrointestinal Cancer

Published on: September 18, 2020

Low SP1 expression differentially affects intestinal-type compared with diffuse-type gastric adenocarcinoma.

Hun Seok Lee1, Cheol-Keun Park, Ensel Oh

  • 1Research Institute of Pharmaceutical Science, College of Pharmacy, Seoul National University, Seoul, Korea.

Plos One
|February 26, 2013
PubMed
Summary

Specificity protein 1 (SP1) impacts gastric cancer outcomes differently based on cell type. Low SP1 expression correlates with poor survival in intestinal-type gastric cancer, while high SP1 expression is linked to decreased survival in diffuse-type gastric cancer.

Related Experiment Videos

Last Updated: May 13, 2026

Genome-Wide Analysis of DNA Methylation in Gastrointestinal Cancer
07:50

Genome-Wide Analysis of DNA Methylation in Gastrointestinal Cancer

Published on: September 18, 2020

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Specificity protein 1 (SP1) is a transcription factor crucial for cancer-related gene regulation.
  • Aberrant SP1 expression is implicated in cancer development and progression.
  • Understanding SP1's role in gastric cancer is vital for improving patient outcomes.

Purpose of the Study:

  • To investigate the expression patterns of SP1 in gastric carcinoma.
  • To correlate SP1 expression levels with disease outcomes in different histological types of gastric cancer.
  • To elucidate the functional role of SP1 in gastric cancer cell migration, invasion, and proliferation.

Main Methods:

  • Analysis of SP1 expression in gastric carcinoma patient samples.
  • Correlation of SP1 levels with patient survival data for diffuse-type and intestinal-type gastric cancer.
  • SP1 knockdown and forced expression experiments in gastric cancer cell lines (MKN28, AGS, SNU484).
  • Assessment of cell migration, invasion, and proliferation following SP1 manipulation.
  • Microarray analysis to identify downstream gene expression changes.

Main Results:

  • In diffuse-type gastric cancer, increased SP1 expression correlated with decreased patient survival.
  • In intestinal-type gastric cancer, low SP1 expression was significantly associated with poor survival.
  • SP1 knockdown in intestinal-type cells (MKN28) enhanced migration and invasion while reducing proliferation.
  • Forced SP1 expression in intestinal-type cells (AGS) decreased migration and invasion.
  • SP1 knockdown in diffuse-type cells (SNU484) reduced migration and invasion.

Conclusions:

  • SP1 plays a differential role in the progression of intestinal-type versus diffuse-type gastric adenocarcinoma.
  • Low SP1 expression is linked to cancer progression and metastasis in intestinal-type gastric cancer.
  • SP1's distinct functions highlight the need for type-specific therapeutic strategies in gastric cancer treatment.