Y S Saad studies pig-to-human organ transplantation, specifically kidneys. This involves transplanting a pig kidney into a human recipient to assess its functionality and interaction with the human immune system. Saad's research highlights the immune responses involved when foreign organs are introduced into the human body, including the rejection of the transplanted organ and the necessary strategies to overcome these challenges. By using standard immunosuppression methods without experimental drugs, Saad aims to determine how well a pig kidney can sustain life in a human environment while identifying the immune barriers that hinder long-term success.
Key findings
In a study, a pig kidney was able to sustain a human recipient's kidney function for 61 days without the need for experimental treatments.
Specific T cell clones that reacted against the pig donor increased significantly during kidney rejection, indicating a strong immune response.
Natural killer cells and gamma-delta T cells were found to be actively attacking the transplanted kidney during the rejection process, revealing critical insights into the immune mechanisms at play.
Frequently asked questions
Does Dr. Saad study kidney transplants?
Yes, Dr. Saad specializes in kidney transplants, particularly the transplantation of pig kidneys into humans.
What treatments has Dr. Saad researched?
Dr. Saad has researched the use of standard immunosuppression methods to prevent organ rejection in xenotransplantation.
Is Dr. Saad's work relevant to patients needing organ transplants?
Yes, Dr. Saad's research is highly relevant as it explores potential solutions to the shortage of human organs by using pig organs for transplantation.
Publications in plain English
Physiology and immunology of a pig-to-human decedent kidney xenotransplant.
2026
Nature
Montgomery RA, Stern JM, Fathi F, Suek N, Kim JI +48 more
Plain English A gene-edited pig kidney was transplanted into a brain-dead human and kept functioning for a planned 61-day study using only standard approved anti-rejection drugs. The kidney maintained stable electrolyte balance and eliminated the need for dialysis, but antibody-mediated rejection emerged on day 33 and was reversed with plasma exchange and complement inhibition. The study shows a minimally modified pig kidney can sustain human-equivalent kidney function and identifies pre-existing immune cells reactive to pig tissue as a key obstacle to long-term success.
Donor-reactive T cells and innate immune cells promote pig-to-human decedent xenograft rejection.
2025
Research square
Fathi F, Suek N, Vermette B, Breen K, Saad YS +14 more
Plain English This study tracked how donor-reactive immune cells behaved during a 61-day pig-to-human decedent kidney transplant. Specific T cell clones that attack pig tissue were detected expanding in blood and the organ, and innate immune cells also contributed to rejection. The findings clarify the combined immune barriers that must be overcome before pig-to-human transplants can succeed in living patients.
Single hepatocytes show persistence and transcriptional inactivity of hepatitis B.
2020
JCI insight
Balagopal A, Grudda T, Ribeiro RM, Saad YS, Hwang HS +9 more
Plain English This study looked at how a common treatment for hepatitis B, called nucleos(t)ide analogs (NUCs), affects the virus in the liver over time. Researchers found that while the number of infected liver cells went down as people continued their NUC treatment, it would still take more than 100 years to completely eliminate the virus from the liver. In fact, in most patients, there were liver cells that had viral DNA but were not actively producing virus particles, which could be a key to finding better treatments.
Who this helps: This research benefits patients with chronic hepatitis B by paving the way for more effective treatments.
Comparative evaluation of Glasgow Coma Score and gag reflex in predicting aspiration pneumonitis in acute poisoning.
2009
Journal of critical care
Eizadi-Mood N, Saghaei M, Alfred S, Zargarzadeh AH, Huynh C +3 more
Plain English This study looked at how well the Glasgow Coma Score (GCS) and the gag reflex predict the risk of aspiration pneumonitis (a lung infection) in people who have been poisoned. Out of 155 patients with a GCS of 12 or less, 15.5% developed aspiration pneumonitis, with those showing a reduced gag reflex and not being intubated at higher risk. These findings help identify patients who might need more careful monitoring and treatment after poisoning to prevent lung complications.
Who this helps: Patients who have been poisoned and medical professionals treating them.
An analysis of individual, household, and environmental risk factors for intestinal helminth infection among children in Qena Governorate, Upper Egypt.
1999
Journal of tropical pediatrics
Curtale F, Pezzotti P, Saad YS, Aloi A
Plain English This study looked at various factors that contribute to intestinal worm infections in children aged 2 to 12 in Qena Governorate, Upper Egypt. The researchers found that children aged 4 to 5, mothers who married at a younger age, how families dispose of garbage, and the type of living conditions all significantly increased the risk of infection. Understanding these factors is crucial because it can help in creating targeted strategies to reduce infections in young children.
Who this helps: This helps children and families in areas affected by intestinal worm infections.
Knowledge, perceptions and behaviour of mothers toward intestinal helminths in Upper Egypt: implications for control.
1998
Health policy and planning
Curtale F, Pezzotti P, Sharbini AL, al Maadat H, Ingrosso P +2 more
Plain English This study examined how mothers in Upper Egypt understand and manage intestinal worms in their children, focusing on areas with higher infection rates. Researchers found that out of 2,657 children surveyed, worm infections were more common in rural areas, but most mothers knew these worms were harmful and how to prevent them. Good hygiene practices helped reduce infections, indicating that targeted health education and resources are essential for controlling these parasites effectively.
Who this helps: This helps mothers, children, and healthcare workers in communities affected by intestinal worm infections.