* Asian stocks up slightly on hopes of Sino-U.S. trade talks
* Investors not sure if meaningful deal can be reached
* Oil edges up on tensions in the Persian Gulf
* Gold at 6-year high on weak dollar, safe-haven bids
* Asian stock markets: tmsnrt.rs/2zpUAr4
By Hideyuki Sano
TOKYO, June 24 (Reuters) - Asian shares were off to a cautious start on Monday as investors pinned their hopes on any signs of a thaw in Sino-U.S. trade negotiations while oil prices firmed on worries over heightened tensions between the United States and Iran.
MSCI's broadest index of Asia-Pacific shares outside Japan rose 0.16% in early trade while Japan's Nikkei ticked down 0.26%.
Wall Street shares closed slightly lower on Friday after hitting a record high thanks to signals last week from the Federal Reserve that it would cut interest rates soon to bolster its economy from protracted trade conflicts.
The Chinese state-run Xinhua news agency said on Sunday China's President Xi Jinping will attend the G20 summit in Japan this week, giving the first official confirmation of his attendance at a gathering where he is expected to meet U.S. President Donald Trump.
The news came after U.S. Vice President Mike Pence on Friday decided to call off a planned China speech, which also increased optimism on upcoming trade talks with Beijing. Pence had upset China with a fierce speech in October in which he laid out a litany of complaints ranging from state surveillance to human-rights abuses.
"Event-driven players are buying back stocks as U.S. and China at least appear to be talking to each other," said Norihiro Fujito, chief investment strategist at Mitsubishi UFJ Morgan Stanley Securities.
Still, there remain doubts on whether the two sides could come to any meaningful agreement as the tensions have extended beyond tariffs, particularly after Washington put Huawei , the world's biggest telecoms gear maker, on a blacklist that effectively bans U.S. firms from doing business with the company.
The U.S. Commerce Department said on Friday it was adding several Chinese companies and a government-owned institute involved in super computing with military applications to its national security "entity list" that bars them from buying U.S. parts and components without government approval.
In China, the Global Times newspaper said FedEx Corp is likely to be added to Beijing's 'unreliable entities list'.
"Few investors would expect a dramatic progress when they are talking about entity lists, just days before a likely summit," Fujito said, adding that markets could slip back on disappointment after the summit.
Oil prices held firm near three-week highs hit last week after the United States and Iran came to the brink of war following Iran's shooting down of an unmanned U.S. surveillance drone.
Brent crude futures rose 0.6% to $65.58 per barrel, near Friday's three-week high of $65.76. U.S. crude futures were up 0.75% at $57.88 per barrel.
Tehran said the drone was spying over its territory while Washington said it was downed over international airspace.
President Trump said on Sunday he was not seeking war with Tehran after a senior Iranian military commander warned any conflict in the Gulf region could spread uncontrollably and threaten the lives of U.S. troops.
Yet tensions remain high between longtime foes Iran and the United States, with Washington due to announce "significant" sanctions on Iran on Monday.
Also potentially becoming a factor in the equation, Arab politicians and commentators greeted Trump's $50 billion Middle East economic vision with a mixture of derision and exasperation, although some in the Gulf called for it to be given a chance.
The combination of heightened geopolitical worries and likely U.S. interest rates cuts encouraged investors to seek the safety of gold.
The precious metal stood at $1,406.2 per ounce, near Friday's six-year high of $1,411.2.
The euro rose to three-month high of $1.1379 in early Monday trade.
The dollar fetched 107.33 yen, having slipped to as low as 107.045 on Friday, the lowest level since its flash crash on Jan. 3.
The Turkish lira strengthened about 0.75% to 5.767 after Turkey's main opposition claimed a decisive victory on Sunday in Istanbul's re-run election, dealing one of the biggest blows to President Tayyip Erdogan. (Editing by Jacqueline Wong)