Allelic variants of IL1R1 gene associate with severe hand osteoarthritis.

BACKGROUND: In search for genes predisposing to osteoarthritis (OA), several genome wide scans have provided evidence for linkage on 2q. In this study we targeted a 470 kb region on 2q11.2 presenting the locus with most evidence for linkage to severe OA of distal interphalangeal joints (DIP) in our genome wide scan families. METHODS: We genotyped 32 single nucleotide polymorphisms (SNPs) in this 470 kb region comprising six genes belonging to the interleukin 1 superfamily and monitored for association with individual SNPs and SNP haplotypes among severe familial hand OA cases (material extended from our previous linkage study; n = 134), unrelated end-stage bilateral primary knee OA cases (n = 113), and population based controls (n = 436). RESULTS: Four SNPs in the IL1R1 gene, mapping to a 125 kb LD block, provided evidence for association with hand OA in family-based and case-control analysis, the strongest association being with SNP rs2287047 (p-value = 0.0009). CONCLUSIONS: This study demonstrates an association between severe hand OA and IL1R1 gene. This gene represents a highly relevant biological candidate since it encodes protein that is a known modulator of inflammatory processes associated with joint destruction and resides within a locus providing consistent evidence for linkage to hand OA. As the observed association did not fully explain the linkage obtained in the previous study, it is plausible that also other variants in this genome region predispose to hand OA.

Lichtenstein hernioplasty versus totally extraperitoneal laparoscopic hernioplasty in treatment of recurrent inguinal hernia--a prospective randomized trial.

OBJECTIVE: To compare the Lichtenstein hernioplasty with a totally extraperitoneal preperitoneal laparoscopic technique (TEP) in treatment of recurrent inguinal hernias. SUMMARY BACKGROUND DATA: Only a few studies thus far have compared an open and laparoscopic approach with the treatment of recurrent inguinal hernia in a prospective randomized study setting. METHODS: Ninety-nine patients undergoing surgery for recurrent inguinal hernia were prospectively randomized into having either open or laparoscopic mesh repair. Pre, peri- and postoperative factors were recorded in addition to 3-year follow-up data at the outpatient clinic. At 5-10 years, the patients were interviewed via telephone for recurrent symptoms. The primary end-points chosen were hernia recurrence and chronic pain. RESULTS: Preoperative factors did not differ between the 2 groups. Rerecurrence rates were 3 in the Lichtenstein group and none in the TEP group (6.4% versus 0.0%, respectively), but this difference was statistically not significant. Chronic pain was more prevalent in the Lichtenstein group compared with the TEP group (13 [27.7%] versus 4 [8.2%] patients, respectively, P = 0.02). Postoperatively, the Lichtenstein group needed more pain medication than the TEP group (4.4 versus 3.0 doses, respectively, P = 0.02) and returned to work later (17.9 versus 14.8 days, respectively, P = 0.05). CONCLUSIONS: The laparoscopic technique with mesh in the treatment of recurrent inguinal hernia was proven superior to the open mesh repair in several important clinical aspects, with concomitant improvement in patient satisfaction.