2026 Hamid M. Said: Biology and Biochemistry Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Biology and Biochemistry	65	9202	8492	4077	3658	383	14287

Overview

Hamid M. Said is affiliated with the University of California, Irvine in the United States. Their research primarily spans the fields of Medicine and Biochemistry, Genetics and Molecular Biology, with a substantive focus on several subfields including Neurology, Physiology, Nutrition and Dietetics, Clinical Biochemistry, and Rheumatology.

The scientist's work covers a range of topics, notably:

Alcoholism and Thiamine Deficiency
Diet and metabolism studies
Metabolism and Genetic Disorders
Folate and B Vitamins Research
Biotin and Related Studies
Vitamin C and Antioxidants Research
Escherichia coli research studies

Hamid M. Said has contributed to several research articles in various reputable scientific journals. Some of their recent publications include:

Enterotoxigenic Escherichia coli heat-labile toxin drives enteropathic changes in small intestinal epithelia (2022), published in Nature Communications
pH-dependent pyridoxine transport by SLC19A2 and SLC19A3: Implications for absorption in acidic microclimates (2020), published in Journal of Biological Chemistry
Biotin Deficiency Induces Intestinal Dysbiosis Associated with an Inflammatory Bowel Disease-like Phenotype (2023), published in Nutrients
Alzheimer's disease is associated with disruption in thiamin transport physiology: A potential role for neuroinflammation (2022), published in Neurobiology of Disease
Hypoxia inhibits colonic uptake of the microbiota-generated forms of vitamin B1 via HIF-1α-mediated transcriptional regulation of their transporters (2022), published in Journal of Biological Chemistry

The frequent coauthors collaborating with Hamid M. Said include:

Subrata Sabui
Kalidas Ramamoorthy
James M. Fleckenstein
Anthonymuthu Selvaraj
Alaullah Sheikh

Regarding publication venues, Said has multiple works appearing in the following journals:

American Journal of Physiology-Gastrointestinal and Liver Physiology
American Journal of Physiology-Cell Physiology
Gastroenterology
Physiology
Journal of Biological Chemistry

Best Publications

TNF-α-induced increase in intestinal epithelial tight junction permeability requires NF-κB activation

Thomas Y. Ma;Gary K. Iwamoto;Neil T. Hoa;Vimesh Akotia

1006
Citations
Lipopolysaccharide Causes an Increase in Intestinal Tight Junction Permeability in Vitro and in Vivo by Inducing Enterocyte Membrane Expression and Localization of TLR-4 and CD14

Shuhong Guo;Rana Al-Sadi;Rana Al-Sadi;Hamid M. Said;Thomas Y. Ma;Thomas Y. Ma

646
Citations
Mechanism of TNF-α modulation of Caco-2 intestinal epithelial tight junction barrier: role of myosin light-chain kinase protein expression

Thomas Y. Ma;Michel A. Boivin;Dongmei Ye;Ali Pedram

518
Citations
Intestinal absorption of water-soluble vitamins in health and disease

Hamid M. Said

388
Citations
IL-1β-Induced Increase in Intestinal Epithelial Tight Junction Permeability Is Mediated by MEKK-1 Activation of Canonical NF-κB Pathway

Rana Al-Sadi;Dongmei Ye;Hamid M. Said;Thomas Y. Ma

216
Citations
Recent Advances in Carrier-Mediated Intestinal Absorption of Water-Soluble Vitamins

Hamid M. Said

186
Citations
Intestinal absorption of water-soluble vitamins: an update.

Hamid M Said;Zainab M Mohammed

185
Citations
Adaptive regulation of intestinal folate uptake: effect of dietary folate deficiency.

Hamid M. Said;Nabendu Chatterjee;Riaz Ul Haq;Veedamali S. Subramanian

160
Citations
Mechanism of IL-1β Modulation of Intestinal Epithelial Barrier Involves p38 Kinase and Activating Transcription Factor-2 Activation

Rana Al-Sadi;Shuhong Guo;Dongmei Ye;Karol Dokladny

153
Citations
Folate transport by human intestinal brush-border membrane vesicles

H. M. Said;F. K. Ghishan;Reyadh Redha

151
Citations
Expression and functional contribution of hTHTR-2 in thiamin absorption in human intestine

Hamid M. Said;Krishnaswamy Balamurugan;Krishnaswamy Balamurugan;Veedamali S. Subramanian;Veedamali S. Subramanian;Jonathan S. Marchant

141
Citations
Biotin uptake by human colonic epithelial NCM460 cells: a carrier-mediated process shared with pantothenic acid.

Hamid M. Said;Alvaro Ortiz;Alvaro Ortiz;Eric McCloud;Eric McCloud;David Dyer;David Dyer

140
Citations
Effect of folate oversupplementation on folate uptake by human intestinal and renal epithelial cells

Balasubramaniem Ashokkumar;Zainab M Mohammed;Nosratola D Vaziri;Hamid M Said

137
Citations
Human intestinal folate transport: Cloning, expression, and distribution of complementary RNA

Toai T. Nguyen;David L. Dyer;Daniel D. Dunning;Stanley A. Rubin

137
Citations
Intestinal transport of zinc and folic acid: a mutual inhibitory effect

F K Ghishan;H M Said;P C Wilson;J E Murrell

130
Citations
Biotin uptake by human intestinal and liver epithelial cells: role of the SMVT system

Krishnaswamy Balamurugan;Alvaro Ortiz;Hamid M. Said

125
Citations
Cell and Molecular Aspects of Human Intestinal Biotin Absorption

Hamid M. Said

125
Citations
Biotin transport in the human intestine: inhibition by anticonvulsant drugs.

H M Said;R Redha;W Nylander

124
Citations
A carrier-mediated, Na+ gradient-dependent transport for biotin in human intestinal brush-border membrane vesicles

H. M. Said;R. Redha;W. Nylander

122
Citations
Riboflavin uptake by human-derived colonic epithelial NCM460 cells.

Hamid M. Said;Alvaro Ortiz;Mary Pat Moyer;Norimoto Yanagawa

117
Citations