The US and Kazakhstani presidents discussed the enhanced strategic partnership between Astana and Washington and resolved to strengthen co-operation on political and security issues.
The US and Central Asian nations share key strategic interests such as countering terrorism and improving regional stability, says a top US diplomat.
Central Asian nations will increase co-operation this year, with leaders potentially meeting for the first time since 2005, Kazakhstani political scientist Erlan Karin predicts.
Central Asian security, bilateral trade and infrastructure development were among the topics during Afghan President Ashraf Ghani's visit to Tashkent earlier this month.
The leaders of the two countries oversaw the signing of dozens of agreements and trade contracts worth more than $500 million.
Strengthening ties will help both countries develop rapidly and stimulate their economy, observers predict.
Integration of Central Asian states will help improve security and prosperity in the region, predicts Kazakhstani President Nursultan Nazarbayev.
EU concerns include preventing youth radicalisation, the Iranian nuclear programme and achieving stability in Afghanistan, EU foreign policy chief Federica Mogherini said.
The US Consulate General teamed with private businesses to open a new collaborative community centre.
The most tangible sign of progress was the re-opening of the long-restricted Dostuk/Dustlik border crossing.