I think it's broader than that... I found a paper relating BT carriers with symptoms resembling pseudo-PXE.
(Ringpfeil. Selected disorders of connective tissue: pseudoxanthoma elasticum, cutis laxa, and lipoid …. Clinics in Dermatology (2005) )
I was diagnosed, because of my joint laxity, with Ehlers-Danlos...not diagnosed genetically tho.
Sure I bruise easily and my skin is sorta flexible, and my shoulders pop out... but I think this may all be related to problems with connective tissue (CT) due to BT. If BTs have CT problems this could show up as a problem with PHT also.
If we could get the BT folks to test BTM, BTI and BTm people for issues with connective tissue. It would explain a lot, including the easy bruising.
There is another paper talking about exactly this in Monkeys where they introduced bovine collagen immunization. This collagen-induced arthritis then induced anemia.
(Uchiyama et al. Anemia in monkey collagen-induced arthritis is correlated with serum IL-6, but not TNFα. Rheumatol Int (2008) vol. 28 (9) pp. 879-883)
To me it seems the two are intimately related. If the difference between a symptom less carrier and those of us carriers and intermedia's that show symptoms maybe a co-existance of connective tissue genetic trait that exacerbates the anemia.
This has been shown in other cases that couple collagen-anemia:
"Cases of rheumatism and collagen disease show anemia with chronic diseases (ACD)"
http://sciencelinks.jp/j-east/article/200101/000020010100A0491921.phpHemolytic anemia caused by collagen related disease as in Lupus.
http://bidmc.harvard.edu/YourHealth/ConditionsAZ.aspx?ChunkID=100693Here is a paper that talks about platelet interacting with collagen and collage receptors in the blood.
http://www.bloodjournal.org/cgi/reprint/103/4/1180.pdfYet another paper cites collagen as a marker for Sickle cell health since Type I collage is synthesized by osteoblasts (made in the marrow and periosteum, or surface of the bone)...but if our marrow is already compromised and anemia prevents periosteum from receiving nourishment, then collage and bone growth/repair ought to be compromised...
http://cat.inist.fr/?aModele=afficheN&cpsidt=2124800I am but a PhD graduate student in engineering... and though I've taken some bio classes and my research involves simulation of molecules, I'm no PhD or doctor.
But from reading a few papers it sure seems to me that anemia and collage health go hand in hand and is much more synchronous than the docs caring for us have been taught it may be.
Who are the main PhD's and MD's researching thalassemia? Can't we talk to them? Can't we do our own study interviewing patients of thalassemia and their complaints?