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Kinetics of platelet 5-hydroxytryptamine uptake in headache patients.
Cephalalgia. 1991 Jul; 11(3):141-5.C

Abstract

Platelet 5-hydroxytryptamine (5-HT) uptake was measured in asymptomatic headache patients attending a specialist migraine clinic, and in hospital staff who did not suffer from regular or severe headache. Current levels of anxiety and depression were assessed in all subjects using the Hospital Anxiety and Depression (HAD) scale and their possible influence on the uptake kinetics taken into account during the analysis of results. The Michaelis-Menten constant (Km) was significantly raised in common migraine and tension headache compared with controls (p less than 0.001 and p less than 0.01, respectively), but not in classical migraine or cluster headache. The increase remained significant after adjusting for differences in age, sex, presence of anxiety or depression (HAD sub-scale score greater than or equal to 8), drug intake during the week before testing, time elapsed since last attack and time of assay (am or pm). No differences were observed between patients and controls in the maximal rate of uptake (Vmax) or platelet count, and previous reports of a reduction in Vmax in patients experiencing attack within 5 days prior to testing could not be confirmed. The cause and significance of an increased Km are not clear, but plasma factors acting as competitive inhibitors for the uptake site or an alteration in the configuration of the uptake site are possible explanations. If confirmed, the shared biochemical abnormality may suggest that common migraine and tension headache have a common pathogenesis.

Authors+Show Affiliations

Bernhard Baron Memorial Research Laboratories, Queen Charlotte's and Chelsea Hospital, London.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

1889070

Citation

Hannah, P, et al. "Kinetics of Platelet 5-hydroxytryptamine Uptake in Headache Patients." Cephalalgia : an International Journal of Headache, vol. 11, no. 3, 1991, pp. 141-5.
Hannah P, Jarman J, Glover V, et al. Kinetics of platelet 5-hydroxytryptamine uptake in headache patients. Cephalalgia. 1991;11(3):141-5.
Hannah, P., Jarman, J., Glover, V., Sandler, M., Davies, P. T., & Clifford Rose, F. (1991). Kinetics of platelet 5-hydroxytryptamine uptake in headache patients. Cephalalgia : an International Journal of Headache, 11(3), 141-5.
Hannah P, et al. Kinetics of Platelet 5-hydroxytryptamine Uptake in Headache Patients. Cephalalgia. 1991;11(3):141-5. PubMed PMID: 1889070.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Kinetics of platelet 5-hydroxytryptamine uptake in headache patients. AU - Hannah,P, AU - Jarman,J, AU - Glover,V, AU - Sandler,M, AU - Davies,P T, AU - Clifford Rose,F, PY - 1991/7/1/pubmed PY - 1991/7/1/medline PY - 1991/7/1/entrez SP - 141 EP - 5 JF - Cephalalgia : an international journal of headache JO - Cephalalgia VL - 11 IS - 3 N2 - Platelet 5-hydroxytryptamine (5-HT) uptake was measured in asymptomatic headache patients attending a specialist migraine clinic, and in hospital staff who did not suffer from regular or severe headache. Current levels of anxiety and depression were assessed in all subjects using the Hospital Anxiety and Depression (HAD) scale and their possible influence on the uptake kinetics taken into account during the analysis of results. The Michaelis-Menten constant (Km) was significantly raised in common migraine and tension headache compared with controls (p less than 0.001 and p less than 0.01, respectively), but not in classical migraine or cluster headache. The increase remained significant after adjusting for differences in age, sex, presence of anxiety or depression (HAD sub-scale score greater than or equal to 8), drug intake during the week before testing, time elapsed since last attack and time of assay (am or pm). No differences were observed between patients and controls in the maximal rate of uptake (Vmax) or platelet count, and previous reports of a reduction in Vmax in patients experiencing attack within 5 days prior to testing could not be confirmed. The cause and significance of an increased Km are not clear, but plasma factors acting as competitive inhibitors for the uptake site or an alteration in the configuration of the uptake site are possible explanations. If confirmed, the shared biochemical abnormality may suggest that common migraine and tension headache have a common pathogenesis. SN - 0333-1024 UR - https://www.unboundmedicine.com/medline/citation/1889070/Kinetics_of_platelet_5_hydroxytryptamine_uptake_in_headache_patients_ L2 - https://journals.sagepub.com/doi/10.1046/j.1468-2982.1991.1103141.x?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -