DES MOINES, Iowa (Reuters) - A bill curbing collective bargaining rights for public workers in Iowa passed the House labor committee on Friday after an all-night attempt by Democrats to block the vote.

Democrats on the committee added 50 amendments to the bill, all of which were voted down. The bill passed on a party-line vote and now heads for the full house.

Representative Kirsten Running-Marquardt, a Democrat from Cedar Rapids, had urged colleagues to keep collective bargaining rights in place for Iowa's public employees.

"We are willing to go all night long here, tomorrow, through the weekend, however long we need to take, so we will not take away rights from police officers, firefighters teachers, state troopers and all of our other workers," Running-Marquardt said.

The bill would exclude health insurance from the scope of collective bargaining, along with other changes.

Republican-backed bills to limit collective bargaining for public workers have led to protests in Wisconsin and Ohio.

(Reporting by Kay Henderson; Editing by Mary Wisniewski and Jerry Norton)